HYDROLOGY REPORT

PACIFIC CENTER Anaheim, California

Prepared for

Hines Company 4000 MacArthur Blvd. Suite 110 Newport Beach, CA 92660 949.313.2230 Prepared by

Fuscoe Engineering, Inc. 16795 Von Karman, Suite 100 Irvine, California 92606 949.474.1960 www.fuscoe.com Project Manager: Mark Nero, P.E.

Date Prepared: August 2017

Job Number: 1253-002-01

PACIFIC CENTER H yd r o l ogy R epo r t – A ugu s t 2017

125

3-0

02-0

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1253-0

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PACIFIC CENTER H yd r o l ogy R epo r t , Au gu s t 2017

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HYDROLOGY REPORT August 2017

Pacific Center City of Anaheim, CA

F:\Projects\1253\002\_Support Files\Reports\Hydrology\Hydrology Report August 2017.docx

Table of Contents

1.0 INTRODUCTION 1

1.1 Geographic Setting ...........................................................................................1

1.2 Project Description ............................................................................................1

1.3 Purpose of This Report .......................................................................................1

1.4 References .......................................................................................................2

2.0 EXISTING TOPOGRAPHIC & HYDROLOGIC CONDITIONS 3

2.1 Existing Topography ..........................................................................................3

2.2 Existing On-site Drainage Pattern and Facilities ....................................................3

3.0 PROPOSED ON-SITE DRAINAGE FACILITIES 3

4.0 HYDROLOGY STUDY 5

4.1 Storm Frequency ...............................................................................................5

4.2 Methodology ....................................................................................................5

5.0 DESIGN CRITERIA 5

6.0 RESULTS AND CONCLUSIONS 6

6.1 Conclusions .....................................................................................................6

6.2 Run-Off Comparison Chart ................................................................................7

7.0 APPENDICES 8

Appendix 1 Site Location Map

Appendix 2 10-Year Hydrology Study, Existing Condition Appendix 2.1 25-Year Hydrology Study, Existing Condition Appendix 2.2 100-Year Hydrology Study, Existing Condition

Appendix 3 10-Year Hydrology Study, Proposed Condition Appendix 3.1 25-Year Hydrology Study, Proposed Condition Appendix 3.2 100-Year Hydrology Study, Proposed Condition

Appendix 4 Soils Map Excerpt

Appendix 5 Hydrology Maps (Existing & Proposed) – in pocket

Appendix 6 FEMA Map

Appendix 7 Preliminary Analysis of Detention Requirements

HYDROLOGY REPORT August 2017

Pacific Center 1 City of Anaheim, CA

1.0 INTRODUCTION

1.1 GEOGRAPHIC SETTING

The site, known as “Pacific Center”, is located in the easterly portion of the City of Anaheim at the southwest corner of La Palma Avenue and Tustin Avenue. It is bounded on the west by “Burlington Northern/Santa Fe Railroad” and on the south by The Riverside Freeway (Hwy. 91) and is only a few hundred feet north of The Santa Ana River. The site is presently occupied by several businesses, including a furniture store, a hotel, office buildings, a bank and several restaurants. See Project Site Location Map in Appendix 1.

1.2 PROJECT DESCRIPTION

The proposed project consists of 3 sites: Site ‘A’, Site ‘B’, and Site ‘C’. See Project Site Location Map in Appendix 1. Site ‘A’ and Site ‘B’ which covers only a portion of “Pacific Center,” consists of the addition of approximately 400 apartment units, covered parking structures, swimming pools and landscape improvements. Site ‘C’ consists of reconfiguring and reconstructing the existing retail parking lot and adding a building pad for future building. Existing retail businesses using this parking lot will remain.

1.3 PURPOSE OF THIS REPORT

The purpose of this report is to accomplish the following objectives:

• To determine pre-development and post-developed storm water discharges generated within the project area for determination of design feasibility, detention requirements, constructability and impact on existing facilities. (See Hydrology Studies in Appendix 2 and 3).

• To demonstrate that the "storm water" and "flood" protection goals as outlined in The Orange County Hydrology Manual can be met.

• To establish that there are no significant impacts to the surrounding facilities and properties because of this proposed development.

• To determine site detention requirements, if any, for the project.

• To provide data for the design of size storm water inlet/outlet and conveyance facilities to support the project.

Ponding exhibits, to meet secondary overflow requirements, will be provided on more detailed reports at Precise Grading Plan submittals.

HYDROLOGY REPORT August 2017

Pacific Center 2 City of Anaheim, CA

1.4 REFERENCES

• Orange County Hydrology Manual, 1986

• Orange County Local Drainage Manual, 1986

• Record Plans, documents and GIS information from the City of Anaheim

• Record Plans, documents and GIS information from the County of Orange

• Record Plans and documents from Caltrans

• City of Anaheim “Master Plan of Drainage for North and West Santa Ana River Tributary Areas”

• City of Anaheim “Orange County Hydrology Manual Revisions, Deletions, and Additions,” August 2005

HYDROLOGY REPORT August 2017

Pacific Center 3 City of Anaheim, CA

2.0 EXISTING TOPOGRAPHIC & HYDROLOGIC CONDITIONS

2.1 EXISTING TOPOGRAPHY

The project site is relatively flat with the highest point being at the northwest corner of the site at La Palma Avenue and the railroad. The site generally slopes southwesterly, but there is a small portion thereof that flows north to La Palma Avenue and east to Tustin Avenue. Except for a small underground storm drain (12” to 18”) along the southern boundary, public and/or underground storm drain facilities are practically non-existent on the site, as the site relies almost solely on surface drainage. The site is almost completely improved with buildings, parking, local streets and drives.

2.2 EXISTING ON-SITE DRAINAGE PATTERN AND FACILITIES

Refer to the Hydrology Maps in Appendix 5 for graphical locations of the items described in the following sections. Drainage on the site follows the existing topography of the land, with existing drainage patterns as follows: The general direction of flow of the site is from northeast to southwest where flow is delivered to the corner of the site near the intersection of Highway 91 and the railroad. The runoff from the site is transported almost entirely by surface devices – streets, drives, curb and gutters, “V” gutters, rectangular channels, etc. In addition to the “small” storm drain mentioned above, there exists near the southwest corner of the site, a double 24” RCP culvert (with headwalls) and a 42” RCP “stub” from the Highway 91 right-of-way. Portion of the existing retail area flows north to La Palma Avenue and east to Tustin Avenue. Majority of the runoff flows on the surface toward either curb & gutters or parkway culvert which directs the runoff to gutters on La Palma Avenue and Tustin Avenue. See Appendix 4 for Plate “A” of the Orange County Soil map, showing the hydrological soil type for the project as type A.

3.0 PROPOSED ON-SITE DRAINAGE FACILITIES The developed project matches the historic drainage pattern flow of the existing conditions, with the majority of the runoff heading toward the southwest corner of the site and a small portion (existing retail area) flowing toward either La Palma Avenue or Tustin Avenue. It is anticipated that flow originating on the site and moving on the surface southwesterly will be picked up in improved devices constructed along the west boundary (common with the railroad R/W) and directed to the south toward the existing 42” RCP storm drain pipe. It is also anticipated that two (2) east-to-west underground connector pipes will be constructed to convey flow from and through the new development to the proposed on-grade facilities to be constructed along the west boundary of the site.

HYDROLOGY REPORT August 2017

Pacific Center 4 City of Anaheim, CA

A large majority of the Storm water runoff from this project will be conveyed and discharged into an existing detention basin at the southwest corner of the site. A small percentage of runoff will occur from the north side of the apartment building on site A. This runoff will be detained via an underground storage area and discharged at a rate not exceeding the existing runoff rate.

The preliminary sizing for the storage volume for this project was determined using the small area hydrograph as described in Section J of the Orange County hydrology manual. This estimation is sufficient for watersheds whose time of concentration is less than 25 minutes duration. This project meets the requirements for use of the small area hydrograph as Tc values are on the order of 15 minutes.

No record basin calculations are available for the current development. For purposes of this preliminary report a preliminary basin capacity analysis indicates that the current basin is adequately sized for the proposed development. A conservative value for the change in surface elevation during the peak 25-year storm event calculates at less than 6” using only the bottom area of the basin and disregarding the side slopes and extended “fingers” of the basin. The basin has a storage capacity of approximately 80,000 cubic feet before fully cresting at the culvert inlet. The basin appears to be sized for back to back storms, which is typical for control structures. See the basin capacity calculations at the end of appendix 7. A full depth/discharge analysis will be done for the final hydrology report to be submitted with the precise grading plan documents.

When the existing retail parking lot has been re-configured and re-constructed, a portion of the runoff will still surface drain towards La Palma Avenue and Tustin Avenue. The other portion of the retail parking lot will surface flow towards pervious pavement and bioretention planter which will infiltrate into the ground.

HYDROLOGY REPORT August 2017

Pacific Center 5 City of Anaheim, CA

4.0 HYDROLOGY STUDY

4.1 STORM FREQUENCY

This study is intended to determine "local" discharges for use in the design of drainage pipes and storm runoff control structures. Consistent with the “Master Plan of Drainage for North and West Santa Ana River Tributary Areas,” a 25-year storm frequency was chosen as the minimum design criteria and piping design.

4.2 METHODOLOGY (HYDROLOGY AND HYDRAULICS)

This study utilizes Orange County Hydrology Methodology to calculate the 10-, 25-, and 100-year flowrates for the study area. All three flowrates were used in the street flow hydraulics calculations. Only the 25-year was used to size storm drains, as required by the City of Anaheim Department of Public Works: Storm Drainage Manual for Public and Private Storm Drainage Facilities, August 2005.

AES software was used to determine storm runoff for 10-, 25-, and 100-year storm events.

FlowMaster software will be used to determine preliminary hydraulic calculations to determine if existing size of pipe will have sufficient capacity to collect all the on-site runoff for the proposed conditions.

W.S.P.G. Software will be utilized to determine the H.G.L. of the storm drain system.

Hydrologic studies are included within Appendices 2 and 3 of this report for the 10-, 25-, and 100-year return frequency storms. Note: Hydrology Maps are in Appendix 5.

5.0 DESIGN CRITERIA The proposed storm drain system(s) will be designed to be consistent with the goals and guidelines as presented in the Orange County Hydrology and the Orange County Local Drainage Manuals and City of Anaheim Master Plan of Drainage. Storm drain design, including catch basin openings, is based on a 25-year frequency for overflow conditions and each basin has an acceptable overflow path away from the adjacent buildings. Recommended design water surface elevations inside area drains shall be 0.5’ below inlet grate elevation when possible. Pipe size may not be decreased downstream without the City’s approval. Branching of flow is not allowed. Area drains and appurtenant piping shall be designed in conformance with the Orange County Hydraulics Manual, as amended by City of Anaheim “Drainage Manual for Public and Private Drainage Facilities” dated August 2005.

HYDROLOGY REPORT August 2017

Pacific Center 6 City of Anaheim, CA

6.0 RESULTS AND CONCLUSIONS

6.1 CONCLUSIONS

The analysis provided in this report provides the following conclusions: Results of peak flows (Q) for each area can be seen on the Existing and Proposed Hydrology Maps (Appendix 5). The proposed site is using similar drainage patterns as existing.

Summary of Hydraulics

Hydraulic calculations for pipes sizes and catch basin opening sizes will be prepared based on W.S.P.G. software and submitted with the submission of Grading/Drainage Plans. Hydraulics calculations will be based on the 25-year event.

HYDROLOGY REPORT August 2017

Pacific Center 7 City of Anaheim, CA

6.2 RUN-OFF COMPARISON CHART

Existing Development vs Proposed Development (Based on “Q” = 25 Year Event)

Item Existing Proposed Difference Mitigated Flowrates

Area Flowing to La Palma Ave

3.9 Ac. 3.7 Ac. − 0.2 Ac.

Area Flowing to Tustin Ave

1.9 Ac 0.3 Ac − 1.6 Ac

Area Flowing to S.W. Corner

21.3 Ac. 20.2 Ac. − 1.1 Ac.

Area Flowing to Infiltration

0.0 Ac 3.1 Ac + 2.0 Ac

Total Area of Watershed

27.1 Ac 27.3 Ac + 0.2 Ac

“Q” Flowing to La Palma Ave

10.9 cfs 6.9 cfs - 4.1 cfs N/A

“Q” Flowing to Tustin Ave

6.5 cfs 1.0 cfs − 5.5 cfs N/A

“Q” Flowing to Infiltration

0.0 cfs 11.5 cfs + 11.5 cfs

“Q” Flowing to S.W. Corner

42.2 cfs 48.2 cfs + 5.9 cfs 42±

Total “Q” of Watershed

59.6 cfs 67.6 cfs + 8.0 cfs 60±

Ownership of Watershed Area

Pacific Center 24.5 Ac.

Burlington Northern/Santa Fe Railroad 1.6 Ac.

Caltrans/City of Anaheim 0.9 Ac

Carl’s Jr. 0.2 Ac

Taco Bell 0.3 Ac

Total: 27.5 Ac.

HYDROLOGY REPORT August 2017

Pacific Center 8 City of Anaheim, CA

7.0 APPENDICES

Appendix 1 Site Location Map Appendix 2 10-Year Hydrology Study, Existing Condition Appendix 2.1 25-Year Hydrology Study, Existing Condition Appendix 2.2 100-Year Hydrology Study, Existing Condition Appendix 3 10-Year Hydrology Study, Proposed Condition Appendix 3.1 25-Year Hydrology Study, Proposed Condition Appendix 3.2 100-Year Hydrology Study, Proposed Condition Appendix 4 Soils Map Excerpt Appendix 5 Hydrology Maps (Existing & Proposed) – in pocket Appendix 6 FEMA Map Appendix 7 Preliminary Analysis of Detention Requirements

HYDROLOGY REPORT August 2017

Pacific Center City of Anaheim, CA

APPENDIX 1

Site Location Map

HYDROLOGY REPORT February 2017

Pacific Center City of Anaheim, CA

Project Site Location Map

HYDROLOGY REPORT August 2017

Pacific Center City of Anaheim, CA

APPENDIX 2

10-Year Hydrology Study, Existing Condition

PCEX10

____________________________________________________________________________

****************************************************************************

RATIONAL METHOD HYDROLOGY COMPUTER PROGRAM PACKAGE

(Reference: 1986 ORANGE COUNTY HYDROLOGY CRITERION)

(c) Copyright 1983-2014 Advanced Engineering Software (aes)

Ver. 21.0 Release Date: 06/01/2014 License ID 1355

Analysis prepared by:

Fuscoe Engineering

16795 Von Karman Ave

Suite 100

Irvine CA, 92606

************************** DESCRIPTION OF STUDY **************************

* PACIFIC CENTER - ANAHEIM *

* EXISTING HYDROLOGY *

* 10 YEAR EVENT *

**************************************************************************

FILE NAME: PCEX10.DAT

TIME/DATE OF STUDY: 10:24 08/01/2017

============================================================================

USER SPECIFIED HYDROLOGY AND HYDRAULIC MODEL INFORMATION:

============================================================================

--*TIME-OF-CONCENTRATION MODEL*--

USER SPECIFIED STORM EVENT(YEAR) = 10.00

SPECIFIED MINIMUM PIPE SIZE(INCH) = 12.00

SPECIFIED PERCENT OF GRADIENTS(DECIMAL) TO USE FOR FRICTION SLOPE = 0.90

*DATA BANK RAINFALL USED*

*ANTECEDENT MOISTURE CONDITION (AMC) II ASSUMED FOR RATIONAL METHOD*

*USER-DEFINED STREET-SECTIONS FOR COUPLED PIPEFLOW AND STREETFLOW MODEL*

HALF- CROWN TO STREET-CROSSFALL: CURB GUTTER-GEOMETRIES: MANNING

WIDTH CROSSFALL IN- / OUT-/PARK- HEIGHT WIDTH LIP HIKE FACTOR

NO. (FT) (FT) SIDE / SIDE/ WAY (FT) (FT) (FT) (FT) (n)

=== ===== ========= ================= ====== ===== ====== ===== =======

1 30.0 20.0 0.018/0.018/0.020 0.67 2.00 0.0312 0.167 0.0150

GLOBAL STREET FLOW-DEPTH CONSTRAINTS:

1. Relative Flow-Depth = 0.00 FEET

as (Maximum Allowable Street Flow Depth) - (Top-of-Curb)

2. (Depth)*(Velocity) Constraint = 6.0 (FT*FT/S)

*PIPE MAY BE SIZED TO HAVE A FLOW CAPACITY LESS THAN

UPSTREAM TRIBUTARY PIPE.*

*USER-SPECIFIED MINIMUM TOPOGRAPHIC SLOPE ADJUSTMENT NOT SELECTED

****************************************************************************

FLOW PROCESS FROM NODE 10.00 TO NODE 11.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

Page 1

PCEX10

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 355.00

ELEVATION DATA: UPSTREAM(FEET) = 243.40 DOWNSTREAM(FEET) = 239.40

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.809

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.144

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.87 0.40 0.100 32 7.81

PUBLIC PARK A 0.22 0.40 0.850 32 12.41

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.251

SUBAREA RUNOFF(CFS) = 2.99

TOTAL AREA(ACRES) = 1.09 PEAK FLOW RATE(CFS) = 2.99

****************************************************************************

FLOW PROCESS FROM NODE 11.00 TO NODE 12.00 IS CODE = 61

----------------------------------------------------------------------------

>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>(STANDARD CURB SECTION USED)<<<<<

============================================================================

UPSTREAM ELEVATION(FEET) = 239.40 DOWNSTREAM ELEVATION(FEET) = 238.50

STREET LENGTH(FEET) = 280.00 CURB HEIGHT(INCHES) = 6.0

STREET HALFWIDTH(FEET) = 40.00

DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 20.00

INSIDE STREET CROSSFALL(DECIMAL) = 0.020

OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020

SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1

STREET PARKWAY CROSSFALL(DECIMAL) = 0.020

Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150

Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200

**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 3.93

STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:

STREET FLOW DEPTH(FEET) = 0.43

HALFSTREET FLOOD WIDTH(FEET) = 15.19

AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.62

PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.70

STREET FLOW TRAVEL TIME(MIN.) = 2.88 Tc(MIN.) = 10.69

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.627

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.54 0.40 0.100 32

PUBLIC PARK A 0.31 0.40 0.850 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.374

SUBAREA AREA(ACRES) = 0.85 SUBAREA RUNOFF(CFS) = 1.90

EFFECTIVE AREA(ACRES) = 1.94 AREA-AVERAGED Fm(INCH/HR) = 0.12

Page 2

PCEX10

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.30

TOTAL AREA(ACRES) = 1.9 PEAK FLOW RATE(CFS) = 4.37

END OF SUBAREA STREET FLOW HYDRAULICS:

DEPTH(FEET) = 0.44 HALFSTREET FLOOD WIDTH(FEET) = 15.84

FLOW VELOCITY(FEET/SEC.) = 1.66 DEPTH*VELOCITY(FT*FT/SEC.) = 0.74

LONGEST FLOWPATH FROM NODE 10.00 TO NODE 12.00 = 635.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 12.00 TO NODE 13.00 IS CODE = 61

----------------------------------------------------------------------------

>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>(STANDARD CURB SECTION USED)<<<<<

============================================================================

UPSTREAM ELEVATION(FEET) = 238.50 DOWNSTREAM ELEVATION(FEET) = 238.00

STREET LENGTH(FEET) = 190.00 CURB HEIGHT(INCHES) = 6.0

STREET HALFWIDTH(FEET) = 30.00

DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 15.00

INSIDE STREET CROSSFALL(DECIMAL) = 0.020

OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020

SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1

STREET PARKWAY CROSSFALL(DECIMAL) = 0.020

Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150

Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200

**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 4.80

STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:

STREET FLOW DEPTH(FEET) = 0.47

HALFSTREET FLOOD WIDTH(FEET) = 17.08

AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.58

PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.74

STREET FLOW TRAVEL TIME(MIN.) = 2.00 Tc(MIN.) = 12.69

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.381

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.21 0.40 0.100 32

PUBLIC PARK A 0.22 0.40 0.850 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.484

SUBAREA AREA(ACRES) = 0.43 SUBAREA RUNOFF(CFS) = 0.85

EFFECTIVE AREA(ACRES) = 2.37 AREA-AVERAGED Fm(INCH/HR) = 0.13

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.34

TOTAL AREA(ACRES) = 2.4 PEAK FLOW RATE(CFS) = 4.79

END OF SUBAREA STREET FLOW HYDRAULICS:

DEPTH(FEET) = 0.47 HALFSTREET FLOOD WIDTH(FEET) = 17.08

FLOW VELOCITY(FEET/SEC.) = 1.58 DEPTH*VELOCITY(FT*FT/SEC.) = 0.74

LONGEST FLOWPATH FROM NODE 10.00 TO NODE 13.00 = 825.00 FEET.

****************************************************************************

Page 3

PCEX10

FLOW PROCESS FROM NODE 13.00 TO NODE 13.00 IS CODE = 10

----------------------------------------------------------------------------

>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<<

============================================================================

****************************************************************************

FLOW PROCESS FROM NODE 20.00 TO NODE 21.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 200.00

ELEVATION DATA: UPSTREAM(FEET) = 240.50 DOWNSTREAM(FEET) = 239.70

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.636

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.185

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.24 0.40 0.100 32 7.64

PUBLIC PARK A 0.14 0.40 0.850 32 12.13

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.376

SUBAREA RUNOFF(CFS) = 1.04

TOTAL AREA(ACRES) = 0.38 PEAK FLOW RATE(CFS) = 1.04

****************************************************************************

FLOW PROCESS FROM NODE 21.00 TO NODE 22.00 IS CODE = 91

----------------------------------------------------------------------------

>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<

============================================================================

UPSTREAM NODE ELEVATION(FEET) = 239.70

DOWNSTREAM NODE ELEVATION(FEET) = 239.20

CHANNEL LENGTH THRU SUBAREA(FEET) = 235.00

"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080

PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150

PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000

MAXIMUM DEPTH(FEET) = 1.00

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.560

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.24 0.40 0.100 32

PUBLIC PARK A 0.54 0.40 0.850 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.619

TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 1.84

TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 1.10

AVERAGE FLOW DEPTH(FEET) = 0.25 FLOOD WIDTH(FEET) = 17.34

"V" GUTTER FLOW TRAVEL TIME(MIN.) = 3.55 Tc(MIN.) = 11.18

SUBAREA AREA(ACRES) = 0.78 SUBAREA RUNOFF(CFS) = 1.62

EFFECTIVE AREA(ACRES) = 1.16 AREA-AVERAGED Fm(INCH/HR) = 0.22

Page 4

PCEX10

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.54

TOTAL AREA(ACRES) = 1.2 PEAK FLOW RATE(CFS) = 2.45

END OF SUBAREA "V" GUTTER HYDRAULICS:

DEPTH(FEET) = 0.28 FLOOD WIDTH(FEET) = 19.77

FLOW VELOCITY(FEET/SEC.) = 1.15 DEPTH*VELOCITY(FT*FT/SEC) = 0.32

LONGEST FLOWPATH FROM NODE 20.00 TO NODE 22.00 = 435.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 22.00 TO NODE 23.00 IS CODE = 61

----------------------------------------------------------------------------

>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>(STANDARD CURB SECTION USED)<<<<<

============================================================================

UPSTREAM ELEVATION(FEET) = 239.20 DOWNSTREAM ELEVATION(FEET) = 238.20

STREET LENGTH(FEET) = 205.00 CURB HEIGHT(INCHES) = 6.0

STREET HALFWIDTH(FEET) = 30.00

DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 15.00

INSIDE STREET CROSSFALL(DECIMAL) = 0.020

OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020

SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1

STREET PARKWAY CROSSFALL(DECIMAL) = 0.020

Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150

Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200

**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 2.95

STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:

STREET FLOW DEPTH(FEET) = 0.38

HALFSTREET FLOOD WIDTH(FEET) = 12.44

AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.77

PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.66

STREET FLOW TRAVEL TIME(MIN.) = 1.93 Tc(MIN.) = 13.11

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.337

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.49 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 0.49 SUBAREA RUNOFF(CFS) = 1.01

EFFECTIVE AREA(ACRES) = 1.65 AREA-AVERAGED Fm(INCH/HR) = 0.16

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.41

TOTAL AREA(ACRES) = 1.7 PEAK FLOW RATE(CFS) = 3.23

END OF SUBAREA STREET FLOW HYDRAULICS:

DEPTH(FEET) = 0.38 HALFSTREET FLOOD WIDTH(FEET) = 12.92

FLOW VELOCITY(FEET/SEC.) = 1.81 DEPTH*VELOCITY(FT*FT/SEC.) = 0.69

LONGEST FLOWPATH FROM NODE 20.00 TO NODE 23.00 = 640.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 23.00 TO NODE 23.00 IS CODE = 10

Page 5

PCEX10

----------------------------------------------------------------------------

>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 2 <<<<<

============================================================================

****************************************************************************

FLOW PROCESS FROM NODE 30.00 TO NODE 31.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 290.00

ELEVATION DATA: UPSTREAM(FEET) = 240.90 DOWNSTREAM(FEET) = 239.60

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.660

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.963

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 1.10 0.40 0.100 32 8.66

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 2.89

TOTAL AREA(ACRES) = 1.10 PEAK FLOW RATE(CFS) = 2.89

****************************************************************************

FLOW PROCESS FROM NODE 31.00 TO NODE 23.00 IS CODE = 61

----------------------------------------------------------------------------

>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>(STANDARD CURB SECTION USED)<<<<<

============================================================================

UPSTREAM ELEVATION(FEET) = 239.60 DOWNSTREAM ELEVATION(FEET) = 238.20

STREET LENGTH(FEET) = 465.00 CURB HEIGHT(INCHES) = 6.0

STREET HALFWIDTH(FEET) = 30.00

DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 15.00

INSIDE STREET CROSSFALL(DECIMAL) = 0.020

OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020

SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1

STREET PARKWAY CROSSFALL(DECIMAL) = 0.020

Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150

Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200

**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 3.99

STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:

STREET FLOW DEPTH(FEET) = 0.44

HALFSTREET FLOOD WIDTH(FEET) = 15.50

AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.58

PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.69

STREET FLOW TRAVEL TIME(MIN.) = 4.89 Tc(MIN.) = 13.55

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.293

SUBAREA LOSS RATE DATA(AMC II):

Page 6

PCEX10

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 1.08 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 1.08 SUBAREA RUNOFF(CFS) = 2.19

EFFECTIVE AREA(ACRES) = 2.18 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 2.2 PEAK FLOW RATE(CFS) = 4.42

END OF SUBAREA STREET FLOW HYDRAULICS:

DEPTH(FEET) = 0.45 HALFSTREET FLOOD WIDTH(FEET) = 16.14

FLOW VELOCITY(FEET/SEC.) = 1.62 DEPTH*VELOCITY(FT*FT/SEC.) = 0.73

LONGEST FLOWPATH FROM NODE 30.00 TO NODE 23.00 = 755.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 23.00 TO NODE 23.00 IS CODE = 11

----------------------------------------------------------------------------

>>>>>CONFLUENCE MEMORY BANK # 2 WITH THE MAIN-STREAM MEMORY<<<<<

============================================================================

** MAIN STREAM CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 4.42 13.55 2.293 0.40( 0.04) 0.10 2.2 30.00

LONGEST FLOWPATH FROM NODE 30.00 TO NODE 23.00 = 755.00 FEET.

** MEMORY BANK # 2 CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 3.23 13.11 2.337 0.40( 0.16) 0.41 1.7 20.00

LONGEST FLOWPATH FROM NODE 20.00 TO NODE 23.00 = 640.00 FEET.

** PEAK FLOW RATE TABLE **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 7.59 13.11 2.337 0.40( 0.09) 0.24 3.8 20.00

2 7.58 13.55 2.293 0.40( 0.09) 0.23 3.8 30.00

TOTAL AREA(ACRES) = 3.8

COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:

PEAK FLOW RATE(CFS) = 7.59 Tc(MIN.) = 13.110

EFFECTIVE AREA(ACRES) = 3.76 AREA-AVERAGED Fm(INCH/HR) = 0.09

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.23

TOTAL AREA(ACRES) = 3.8

LONGEST FLOWPATH FROM NODE 30.00 TO NODE 23.00 = 755.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 23.00 TO NODE 23.00 IS CODE = 12

----------------------------------------------------------------------------

>>>>>CLEAR MEMORY BANK # 2 <<<<<

============================================================================

Page 7

PCEX10

****************************************************************************

FLOW PROCESS FROM NODE 23.00 TO NODE 13.00 IS CODE = 91

----------------------------------------------------------------------------

>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<

============================================================================

UPSTREAM NODE ELEVATION(FEET) = 238.20

DOWNSTREAM NODE ELEVATION(FEET) = 238.00

CHANNEL LENGTH THRU SUBAREA(FEET) = 75.00

"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080

PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150

PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000

MAXIMUM DEPTH(FEET) = 0.75

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.260

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.08 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 7.67

TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 1.60

AVERAGE FLOW DEPTH(FEET) = 0.38 FLOOD WIDTH(FEET) = 30.44

"V" GUTTER FLOW TRAVEL TIME(MIN.) = 0.78 Tc(MIN.) = 13.89

SUBAREA AREA(ACRES) = 0.08 SUBAREA RUNOFF(CFS) = 0.16

EFFECTIVE AREA(ACRES) = 3.84 AREA-AVERAGED Fm(INCH/HR) = 0.09

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.23

TOTAL AREA(ACRES) = 3.9 PEAK FLOW RATE(CFS) = 7.59

NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE

END OF SUBAREA "V" GUTTER HYDRAULICS:

DEPTH(FEET) = 0.38 FLOOD WIDTH(FEET) = 30.31

FLOW VELOCITY(FEET/SEC.) = 1.59 DEPTH*VELOCITY(FT*FT/SEC) = 0.61

LONGEST FLOWPATH FROM NODE 30.00 TO NODE 13.00 = 830.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 13.00 TO NODE 13.00 IS CODE = 11

----------------------------------------------------------------------------

>>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<<

============================================================================

** MAIN STREAM CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 7.59 13.89 2.260 0.40( 0.09) 0.23 3.8 20.00

2 7.58 14.33 2.220 0.40( 0.09) 0.23 3.9 30.00

LONGEST FLOWPATH FROM NODE 30.00 TO NODE 13.00 = 830.00 FEET.

** MEMORY BANK # 1 CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 4.79 12.69 2.381 0.40( 0.13) 0.34 2.4 10.00

LONGEST FLOWPATH FROM NODE 10.00 TO NODE 13.00 = 825.00 FEET.

Page 8

PCEX10

** PEAK FLOW RATE TABLE **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 12.10 12.69 2.381 0.40( 0.11) 0.27 5.9 10.00

2 12.12 13.89 2.260 0.40( 0.11) 0.27 6.2 20.00

3 12.03 14.33 2.220 0.40( 0.11) 0.27 6.3 30.00

TOTAL AREA(ACRES) = 6.3

COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:

PEAK FLOW RATE(CFS) = 12.12 Tc(MIN.) = 13.892

EFFECTIVE AREA(ACRES) = 6.21 AREA-AVERAGED Fm(INCH/HR) = 0.11

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.27

TOTAL AREA(ACRES) = 6.3

LONGEST FLOWPATH FROM NODE 30.00 TO NODE 13.00 = 830.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 13.00 TO NODE 13.00 IS CODE = 12

----------------------------------------------------------------------------

>>>>>CLEAR MEMORY BANK # 1 <<<<<

============================================================================

****************************************************************************

FLOW PROCESS FROM NODE 13.00 TO NODE 14.00 IS CODE = 61

----------------------------------------------------------------------------

>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>(STANDARD CURB SECTION USED)<<<<<

============================================================================

UPSTREAM ELEVATION(FEET) = 238.00 DOWNSTREAM ELEVATION(FEET) = 237.00

STREET LENGTH(FEET) = 320.00 CURB HEIGHT(INCHES) = 6.0

STREET HALFWIDTH(FEET) = 30.00

DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 15.00

INSIDE STREET CROSSFALL(DECIMAL) = 0.020

OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020

SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1

STREET PARKWAY CROSSFALL(DECIMAL) = 0.020

Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150

Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200

**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 13.06

STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:

STREET FLOW DEPTH(FEET) = 0.61

HALFSTREET FLOOD WIDTH(FEET) = 29.77

AVERAGE FLOW VELOCITY(FEET/SEC.) = 2.07

PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 1.27

STREET FLOW TRAVEL TIME(MIN.) = 2.57 Tc(MIN.) = 16.46

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.051

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 1.04 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

Page 9

PCEX10

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 1.04 SUBAREA RUNOFF(CFS) = 1.88

EFFECTIVE AREA(ACRES) = 7.25 AREA-AVERAGED Fm(INCH/HR) = 0.10

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.25

TOTAL AREA(ACRES) = 7.3 PEAK FLOW RATE(CFS) = 12.73

END OF SUBAREA STREET FLOW HYDRAULICS:

DEPTH(FEET) = 0.61 HALFSTREET FLOOD WIDTH(FEET) = 29.30

FLOW VELOCITY(FEET/SEC.) = 2.07 DEPTH*VELOCITY(FT*FT/SEC.) = 1.25

LONGEST FLOWPATH FROM NODE 30.00 TO NODE 14.00 = 1150.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 14.00 TO NODE 14.00 IS CODE = 10

----------------------------------------------------------------------------

>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<<

============================================================================

****************************************************************************

FLOW PROCESS FROM NODE 40.00 TO NODE 41.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 290.00

ELEVATION DATA: UPSTREAM(FEET) = 241.70 DOWNSTREAM(FEET) = 240.70

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 9.127

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.876

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.68 0.40 0.100 32 9.13

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 1.74

TOTAL AREA(ACRES) = 0.68 PEAK FLOW RATE(CFS) = 1.74

****************************************************************************

FLOW PROCESS FROM NODE 41.00 TO NODE 42.00 IS CODE = 61

----------------------------------------------------------------------------

>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>(STANDARD CURB SECTION USED)<<<<<

============================================================================

UPSTREAM ELEVATION(FEET) = 240.70 DOWNSTREAM ELEVATION(FEET) = 239.50

STREET LENGTH(FEET) = 260.00 CURB HEIGHT(INCHES) = 6.0

STREET HALFWIDTH(FEET) = 30.00

DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 15.00

INSIDE STREET CROSSFALL(DECIMAL) = 0.020

OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020

SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1

Page 10

PCEX10

STREET PARKWAY CROSSFALL(DECIMAL) = 0.020

Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150

Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200

**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 2.01

STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:

STREET FLOW DEPTH(FEET) = 0.34

HALFSTREET FLOOD WIDTH(FEET) = 10.70

AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.59

PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.54

STREET FLOW TRAVEL TIME(MIN.) = 2.72 Tc(MIN.) = 11.85

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.476

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.25 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 0.25 SUBAREA RUNOFF(CFS) = 0.55

EFFECTIVE AREA(ACRES) = 0.93 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 0.9 PEAK FLOW RATE(CFS) = 2.04

END OF SUBAREA STREET FLOW HYDRAULICS:

DEPTH(FEET) = 0.34 HALFSTREET FLOOD WIDTH(FEET) = 10.81

FLOW VELOCITY(FEET/SEC.) = 1.59 DEPTH*VELOCITY(FT*FT/SEC.) = 0.54

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 42.00 = 550.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 42.00 TO NODE 42.00 IS CODE = 10

----------------------------------------------------------------------------

>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 3 <<<<<

============================================================================

****************************************************************************

FLOW PROCESS FROM NODE 43.00 TO NODE 44.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 330.00

ELEVATION DATA: UPSTREAM(FEET) = 241.50 DOWNSTREAM(FEET) = 240.20

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 9.358

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.835

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 1.73 0.40 0.100 32 9.36

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 4.35

Page 11

PCEX10

TOTAL AREA(ACRES) = 1.73 PEAK FLOW RATE(CFS) = 4.35

****************************************************************************

FLOW PROCESS FROM NODE 44.00 TO NODE 42.00 IS CODE = 91

----------------------------------------------------------------------------

>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<

============================================================================

UPSTREAM NODE ELEVATION(FEET) = 240.20

DOWNSTREAM NODE ELEVATION(FEET) = 239.50

CHANNEL LENGTH THRU SUBAREA(FEET) = 155.00

"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080

PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150

PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000

MAXIMUM DEPTH(FEET) = 0.75

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.617

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 1.17 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 5.71

TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 1.85

AVERAGE FLOW DEPTH(FEET) = 0.32 FLOOD WIDTH(FEET) = 24.19

"V" GUTTER FLOW TRAVEL TIME(MIN.) = 1.40 Tc(MIN.) = 10.76

SUBAREA AREA(ACRES) = 1.17 SUBAREA RUNOFF(CFS) = 2.71

EFFECTIVE AREA(ACRES) = 2.90 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 2.9 PEAK FLOW RATE(CFS) = 6.73

END OF SUBAREA "V" GUTTER HYDRAULICS:

DEPTH(FEET) = 0.34 FLOOD WIDTH(FEET) = 25.81

FLOW VELOCITY(FEET/SEC.) = 1.92 DEPTH*VELOCITY(FT*FT/SEC) = 0.65

LONGEST FLOWPATH FROM NODE 43.00 TO NODE 42.00 = 485.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 42.00 TO NODE 42.00 IS CODE = 11

----------------------------------------------------------------------------

>>>>>CONFLUENCE MEMORY BANK # 3 WITH THE MAIN-STREAM MEMORY<<<<<

============================================================================

** MAIN STREAM CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 6.73 10.76 2.617 0.40( 0.04) 0.10 2.9 43.00

LONGEST FLOWPATH FROM NODE 43.00 TO NODE 42.00 = 485.00 FEET.

** MEMORY BANK # 3 CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 2.04 11.85 2.476 0.40( 0.04) 0.10 0.9 40.00

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 42.00 = 550.00 FEET.

Page 12

PCEX10

** PEAK FLOW RATE TABLE **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 8.68 10.76 2.617 0.40( 0.04) 0.10 3.7 43.00

2 8.40 11.85 2.476 0.40( 0.04) 0.10 3.8 40.00

TOTAL AREA(ACRES) = 3.8

COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:

PEAK FLOW RATE(CFS) = 8.68 Tc(MIN.) = 10.756

EFFECTIVE AREA(ACRES) = 3.74 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 3.8

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 42.00 = 550.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 42.00 TO NODE 42.00 IS CODE = 12

----------------------------------------------------------------------------

>>>>>CLEAR MEMORY BANK # 3 <<<<<

============================================================================

****************************************************************************

FLOW PROCESS FROM NODE 42.00 TO NODE 45.00 IS CODE = 91

----------------------------------------------------------------------------

>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<

============================================================================

UPSTREAM NODE ELEVATION(FEET) = 239.50

DOWNSTREAM NODE ELEVATION(FEET) = 239.20

CHANNEL LENGTH THRU SUBAREA(FEET) = 50.00

"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080

PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150

PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000

MAXIMUM DEPTH(FEET) = 0.50

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.568

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.28 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 9.00

TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 2.29

AVERAGE FLOW DEPTH(FEET) = 0.35 FLOOD WIDTH(FEET) = 27.45

"V" GUTTER FLOW TRAVEL TIME(MIN.) = 0.36 Tc(MIN.) = 11.12

SUBAREA AREA(ACRES) = 0.28 SUBAREA RUNOFF(CFS) = 0.64

EFFECTIVE AREA(ACRES) = 4.02 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 4.1 PEAK FLOW RATE(CFS) = 9.15

END OF SUBAREA "V" GUTTER HYDRAULICS:

DEPTH(FEET) = 0.36 FLOOD WIDTH(FEET) = 27.76

FLOW VELOCITY(FEET/SEC.) = 2.28 DEPTH*VELOCITY(FT*FT/SEC) = 0.81

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 45.00 = 600.00 FEET.

Page 13

PCEX10

****************************************************************************

FLOW PROCESS FROM NODE 45.00 TO NODE 46.00 IS CODE = 91

----------------------------------------------------------------------------

>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<

============================================================================

UPSTREAM NODE ELEVATION(FEET) = 239.20

DOWNSTREAM NODE ELEVATION(FEET) = 238.00

CHANNEL LENGTH THRU SUBAREA(FEET) = 330.00

"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080

PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150

PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000

MAXIMUM DEPTH(FEET) = 0.50

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.251

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.70 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 9.85

TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 1.91

AVERAGE FLOW DEPTH(FEET) = 0.40 FLOOD WIDTH(FEET) = 31.56

"V" GUTTER FLOW TRAVEL TIME(MIN.) = 2.87 Tc(MIN.) = 13.99

SUBAREA AREA(ACRES) = 0.70 SUBAREA RUNOFF(CFS) = 1.39

EFFECTIVE AREA(ACRES) = 4.72 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 4.8 PEAK FLOW RATE(CFS) = 9.40

END OF SUBAREA "V" GUTTER HYDRAULICS:

DEPTH(FEET) = 0.39 FLOOD WIDTH(FEET) = 30.96

FLOW VELOCITY(FEET/SEC.) = 1.90 DEPTH*VELOCITY(FT*FT/SEC) = 0.74

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 46.00 = 930.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 46.00 TO NODE 47.00 IS CODE = 91

----------------------------------------------------------------------------

>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<

============================================================================

UPSTREAM NODE ELEVATION(FEET) = 238.00

DOWNSTREAM NODE ELEVATION(FEET) = 237.60

CHANNEL LENGTH THRU SUBAREA(FEET) = 170.00

"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080

PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150

PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000

MAXIMUM DEPTH(FEET) = 0.50

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.105

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 1.10 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 10.42

Page 14

PCEX10

TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 1.64

AVERAGE FLOW DEPTH(FEET) = 0.43 FLOOD WIDTH(FEET) = 35.22

"V" GUTTER FLOW TRAVEL TIME(MIN.) = 1.73 Tc(MIN.) = 15.72

SUBAREA AREA(ACRES) = 1.10 SUBAREA RUNOFF(CFS) = 2.04

EFFECTIVE AREA(ACRES) = 5.82 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 5.9 PEAK FLOW RATE(CFS) = 10.83

END OF SUBAREA "V" GUTTER HYDRAULICS:

DEPTH(FEET) = 0.44 FLOOD WIDTH(FEET) = 35.83

FLOW VELOCITY(FEET/SEC.) = 1.64 DEPTH*VELOCITY(FT*FT/SEC) = 0.72

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 47.00 = 1100.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 47.00 TO NODE 47.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 15.72

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.105

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.33 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 0.33 SUBAREA RUNOFF(CFS) = 0.61

EFFECTIVE AREA(ACRES) = 6.15 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 6.2 PEAK FLOW RATE(CFS) = 11.44

****************************************************************************

FLOW PROCESS FROM NODE 47.00 TO NODE 14.00 IS CODE = 91

----------------------------------------------------------------------------

>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<

============================================================================

UPSTREAM NODE ELEVATION(FEET) = 237.60

DOWNSTREAM NODE ELEVATION(FEET) = 237.00

CHANNEL LENGTH THRU SUBAREA(FEET) = 220.00

"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080

PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150

PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000

MAXIMUM DEPTH(FEET) = 1.00

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 1.962

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.50 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 11.87

TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 1.78

AVERAGE FLOW DEPTH(FEET) = 0.44 FLOOD WIDTH(FEET) = 36.11

Page 15

PCEX10

"V" GUTTER FLOW TRAVEL TIME(MIN.) = 2.07 Tc(MIN.) = 17.79

SUBAREA AREA(ACRES) = 0.50 SUBAREA RUNOFF(CFS) = 0.86

EFFECTIVE AREA(ACRES) = 6.65 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 6.7 PEAK FLOW RATE(CFS) = 11.51

END OF SUBAREA "V" GUTTER HYDRAULICS:

DEPTH(FEET) = 0.44 FLOOD WIDTH(FEET) = 35.59

FLOW VELOCITY(FEET/SEC.) = 1.77 DEPTH*VELOCITY(FT*FT/SEC) = 0.77

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 14.00 = 1320.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 14.00 TO NODE 14.00 IS CODE = 11

----------------------------------------------------------------------------

>>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<<

============================================================================

** MAIN STREAM CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 11.51 17.79 1.962 0.40( 0.04) 0.10 6.7 43.00

2 11.24 18.94 1.892 0.40( 0.04) 0.10 6.7 40.00

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 14.00 = 1320.00 FEET.

** MEMORY BANK # 1 CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 12.72 15.26 2.142 0.40( 0.10) 0.25 6.9 10.00

2 12.73 16.46 2.051 0.40( 0.10) 0.25 7.2 20.00

3 12.66 16.91 2.020 0.40( 0.10) 0.25 7.3 30.00

LONGEST FLOWPATH FROM NODE 30.00 TO NODE 14.00 = 1150.00 FEET.

** PEAK FLOW RATE TABLE **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 23.51 15.26 2.142 0.40( 0.07) 0.18 12.6 10.00

2 23.88 16.46 2.051 0.40( 0.07) 0.18 13.4 20.00

3 23.92 16.91 2.020 0.40( 0.07) 0.18 13.6 30.00

4 23.78 17.79 1.962 0.40( 0.07) 0.18 14.0 43.00

5 23.05 18.94 1.892 0.40( 0.07) 0.18 14.1 40.00

TOTAL AREA(ACRES) = 14.1

COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:

PEAK FLOW RATE(CFS) = 23.92 Tc(MIN.) = 16.910

EFFECTIVE AREA(ACRES) = 13.65 AREA-AVERAGED Fm(INCH/HR) = 0.07

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.18

TOTAL AREA(ACRES) = 14.1

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 14.00 = 1320.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 14.00 TO NODE 14.00 IS CODE = 12

----------------------------------------------------------------------------

>>>>>CLEAR MEMORY BANK # 1 <<<<<

Page 16

PCEX10

============================================================================

****************************************************************************

FLOW PROCESS FROM NODE 14.00 TO NODE 15.00 IS CODE = 52

----------------------------------------------------------------------------

>>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<

>>>>>TRAVELTIME THRU SUBAREA<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 237.00 DOWNSTREAM(FEET) = 235.10

CHANNEL LENGTH THRU SUBAREA(FEET) = 145.00 CHANNEL SLOPE = 0.0131

CHANNEL FLOW THRU SUBAREA(CFS) = 23.92

FLOW VELOCITY(FEET/SEC) = 3.60 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL)

TRAVEL TIME(MIN.) = 0.67 Tc(MIN.) = 17.58

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 15.00 = 1465.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 15.00 TO NODE 15.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 17.58

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 1.975

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

PUBLIC PARK A 0.16 0.40 0.850 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850

SUBAREA AREA(ACRES) = 0.16 SUBAREA RUNOFF(CFS) = 0.24

EFFECTIVE AREA(ACRES) = 13.81 AREA-AVERAGED Fm(INCH/HR) = 0.07

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.19

TOTAL AREA(ACRES) = 14.2 PEAK FLOW RATE(CFS) = 23.92

NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE

****************************************************************************

FLOW PROCESS FROM NODE 15.00 TO NODE 15.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 17.58

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 1.975

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 1.25 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 1.25 SUBAREA RUNOFF(CFS) = 2.18

EFFECTIVE AREA(ACRES) = 15.06 AREA-AVERAGED Fm(INCH/HR) = 0.07

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.18

TOTAL AREA(ACRES) = 15.5 PEAK FLOW RATE(CFS) = 25.79

****************************************************************************

Page 17

PCEX10

FLOW PROCESS FROM NODE 15.00 TO NODE 16.00 IS CODE = 52

----------------------------------------------------------------------------

>>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<

>>>>>TRAVELTIME THRU SUBAREA<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 235.10 DOWNSTREAM(FEET) = 234.10

CHANNEL LENGTH THRU SUBAREA(FEET) = 205.00 CHANNEL SLOPE = 0.0049

CHANNEL FLOW THRU SUBAREA(CFS) = 25.79

FLOW VELOCITY(FEET/SEC) = 2.24 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL)

TRAVEL TIME(MIN.) = 1.52 Tc(MIN.) = 19.10

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 16.00 = 1670.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 16.00 TO NODE 16.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 19.10

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 1.883

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

PUBLIC PARK A 0.30 0.40 0.850 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850

SUBAREA AREA(ACRES) = 0.30 SUBAREA RUNOFF(CFS) = 0.42

EFFECTIVE AREA(ACRES) = 15.36 AREA-AVERAGED Fm(INCH/HR) = 0.08

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.19

TOTAL AREA(ACRES) = 15.8 PEAK FLOW RATE(CFS) = 25.79

NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE

****************************************************************************

FLOW PROCESS FROM NODE 16.00 TO NODE 16.00 IS CODE = 10

----------------------------------------------------------------------------

>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 3 <<<<<

============================================================================

****************************************************************************

FLOW PROCESS FROM NODE 50.00 TO NODE 51.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 245.00

ELEVATION DATA: UPSTREAM(FEET) = 241.50 DOWNSTREAM(FEET) = 240.50

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.248

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.047

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.84 0.40 0.100 32 8.25

Page 18

PCEX10

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 2.27

TOTAL AREA(ACRES) = 0.84 PEAK FLOW RATE(CFS) = 2.27

****************************************************************************

FLOW PROCESS FROM NODE 51.00 TO NODE 52.00 IS CODE = 41

----------------------------------------------------------------------------

>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 238.00 DOWNSTREAM(FEET) = 237.50

FLOW LENGTH(FEET) = 125.00 MANNING'S N = 0.011

DEPTH OF FLOW IN 12.0 INCH PIPE IS 8.9 INCHES

PIPE-FLOW VELOCITY(FEET/SEC.) = 3.64

GIVEN PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1

PIPE-FLOW(CFS) = 2.27

PIPE TRAVEL TIME(MIN.) = 0.57 Tc(MIN.) = 8.82

LONGEST FLOWPATH FROM NODE 50.00 TO NODE 52.00 = 370.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 52.00 TO NODE 52.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 8.82

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.932

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 1.28 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 1.28 SUBAREA RUNOFF(CFS) = 3.33

EFFECTIVE AREA(ACRES) = 2.12 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 2.1 PEAK FLOW RATE(CFS) = 5.52

****************************************************************************

FLOW PROCESS FROM NODE 52.00 TO NODE 53.00 IS CODE = 41

----------------------------------------------------------------------------

>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 237.50 DOWNSTREAM(FEET) = 236.50

FLOW LENGTH(FEET) = 330.00 MANNING'S N = 0.011

ASSUME FULL-FLOWING PIPELINE

PIPE-FLOW VELOCITY(FEET/SEC.) = 7.03

PIPE FLOW VELOCITY = (TOTAL FLOW)/(PIPE CROSS SECTION AREA)

GIVEN PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1

PIPE-FLOW(CFS) = 5.52

PIPE TRAVEL TIME(MIN.) = 0.78 Tc(MIN.) = 9.60

LONGEST FLOWPATH FROM NODE 50.00 TO NODE 53.00 = 700.00 FEET.

Page 19

PCEX10

****************************************************************************

FLOW PROCESS FROM NODE 53.00 TO NODE 53.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 9.60

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.793

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 1.63 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 1.63 SUBAREA RUNOFF(CFS) = 4.04

EFFECTIVE AREA(ACRES) = 3.75 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 3.8 PEAK FLOW RATE(CFS) = 9.29

****************************************************************************

FLOW PROCESS FROM NODE 53.00 TO NODE 54.00 IS CODE = 41

----------------------------------------------------------------------------

>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 236.50 DOWNSTREAM(FEET) = 236.30

FLOW LENGTH(FEET) = 30.00 MANNING'S N = 0.011

ASSUME FULL-FLOWING PIPELINE

PIPE-FLOW VELOCITY(FEET/SEC.) = 11.83

PIPE FLOW VELOCITY = (TOTAL FLOW)/(PIPE CROSS SECTION AREA)

GIVEN PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1

PIPE-FLOW(CFS) = 9.29

PIPE TRAVEL TIME(MIN.) = 0.04 Tc(MIN.) = 9.65

LONGEST FLOWPATH FROM NODE 50.00 TO NODE 54.00 = 730.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 54.00 TO NODE 54.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 9.65

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.786

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.49 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 0.49 SUBAREA RUNOFF(CFS) = 1.21

EFFECTIVE AREA(ACRES) = 4.24 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 4.2 PEAK FLOW RATE(CFS) = 10.48

Page 20

PCEX10

****************************************************************************

FLOW PROCESS FROM NODE 54.00 TO NODE 55.00 IS CODE = 52

----------------------------------------------------------------------------

>>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<

>>>>>TRAVELTIME THRU SUBAREA<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 236.30 DOWNSTREAM(FEET) = 235.50

CHANNEL LENGTH THRU SUBAREA(FEET) = 160.00 CHANNEL SLOPE = 0.0050

CHANNEL FLOW THRU SUBAREA(CFS) = 10.48

FLOW VELOCITY(FEET/SEC) = 1.79 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL)

TRAVEL TIME(MIN.) = 1.49 Tc(MIN.) = 11.14

LONGEST FLOWPATH FROM NODE 50.00 TO NODE 55.00 = 890.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 55.00 TO NODE 55.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 11.14

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.566

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.31 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 0.31 SUBAREA RUNOFF(CFS) = 0.70

EFFECTIVE AREA(ACRES) = 4.55 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 4.5 PEAK FLOW RATE(CFS) = 10.48

NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE

****************************************************************************

FLOW PROCESS FROM NODE 55.00 TO NODE 55.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 11.14

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.566

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

PUBLIC PARK A 0.19 0.40 0.850 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850

SUBAREA AREA(ACRES) = 0.19 SUBAREA RUNOFF(CFS) = 0.38

EFFECTIVE AREA(ACRES) = 4.74 AREA-AVERAGED Fm(INCH/HR) = 0.05

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.13

TOTAL AREA(ACRES) = 4.7 PEAK FLOW RATE(CFS) = 10.72

****************************************************************************

FLOW PROCESS FROM NODE 55.00 TO NODE 16.00 IS CODE = 52

----------------------------------------------------------------------------

Page 21

PCEX10

>>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<

>>>>>TRAVELTIME THRU SUBAREA<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 235.50 DOWNSTREAM(FEET) = 234.10

CHANNEL LENGTH THRU SUBAREA(FEET) = 255.00 CHANNEL SLOPE = 0.0055

CHANNEL FLOW THRU SUBAREA(CFS) = 10.72

FLOW VELOCITY(FEET/SEC) = 1.88 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL)

TRAVEL TIME(MIN.) = 2.25 Tc(MIN.) = 13.39

LONGEST FLOWPATH FROM NODE 50.00 TO NODE 16.00 = 1145.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 16.00 TO NODE 16.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 13.39

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.308

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

PUBLIC PARK A 0.29 0.40 0.850 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850

SUBAREA AREA(ACRES) = 0.29 SUBAREA RUNOFF(CFS) = 0.51

EFFECTIVE AREA(ACRES) = 5.03 AREA-AVERAGED Fm(INCH/HR) = 0.07

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.17

TOTAL AREA(ACRES) = 5.0 PEAK FLOW RATE(CFS) = 10.72

NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE

****************************************************************************

FLOW PROCESS FROM NODE 16.00 TO NODE 16.00 IS CODE = 11

----------------------------------------------------------------------------

>>>>>CONFLUENCE MEMORY BANK # 3 WITH THE MAIN-STREAM MEMORY<<<<<

============================================================================

** MAIN STREAM CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 10.72 13.39 2.308 0.40( 0.07) 0.17 5.0 50.00

LONGEST FLOWPATH FROM NODE 50.00 TO NODE 16.00 = 1145.00 FEET.

** MEMORY BANK # 3 CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 25.48 17.46 1.983 0.40( 0.08) 0.20 14.3 10.00

2 25.77 18.66 1.909 0.40( 0.08) 0.19 15.1 20.00

3 25.79 19.10 1.883 0.40( 0.08) 0.19 15.4 30.00

4 25.61 19.99 1.835 0.40( 0.08) 0.19 15.7 43.00

5 24.83 21.16 1.776 0.40( 0.08) 0.19 15.8 40.00

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 16.00 = 1670.00 FEET.

** PEAK FLOW RATE TABLE **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

Page 22

PCEX10

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 33.60 13.39 2.308 0.40( 0.08) 0.19 16.0 50.00

2 34.64 17.46 1.983 0.40( 0.08) 0.19 19.4 10.00

3 34.58 18.66 1.909 0.40( 0.08) 0.19 20.1 20.00

4 34.48 19.10 1.883 0.40( 0.07) 0.19 20.4 30.00

5 34.06 19.99 1.835 0.40( 0.07) 0.19 20.7 43.00

6 33.01 21.16 1.776 0.40( 0.07) 0.19 20.8 40.00

TOTAL AREA(ACRES) = 20.8

COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:

PEAK FLOW RATE(CFS) = 34.64 Tc(MIN.) = 17.459

EFFECTIVE AREA(ACRES) = 19.36 AREA-AVERAGED Fm(INCH/HR) = 0.08

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.19

TOTAL AREA(ACRES) = 20.8

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 16.00 = 1670.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 16.00 TO NODE 17.00 IS CODE = 41

----------------------------------------------------------------------------

>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 234.10 DOWNSTREAM(FEET) = 233.20

FLOW LENGTH(FEET) = 55.00 MANNING'S N = 0.013

DEPTH OF FLOW IN 24.0 INCH PIPE IS 13.8 INCHES

PIPE-FLOW VELOCITY(FEET/SEC.) = 9.24

GIVEN PIPE DIAMETER(INCH) = 24.00 NUMBER OF PIPES = 2

PIPE-FLOW(CFS) = 34.64

PIPE TRAVEL TIME(MIN.) = 0.10 Tc(MIN.) = 17.56

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 17.00 = 1725.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 17.00 TO NODE 17.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 17.56

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 1.976

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

PUBLIC PARK A 0.53 0.40 0.850 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850

SUBAREA AREA(ACRES) = 0.53 SUBAREA RUNOFF(CFS) = 0.78

EFFECTIVE AREA(ACRES) = 19.89 AREA-AVERAGED Fm(INCH/HR) = 0.08

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.21

TOTAL AREA(ACRES) = 21.3 PEAK FLOW RATE(CFS) = 34.64

NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE

****************************************************************************

FLOW PROCESS FROM NODE 80.00 TO NODE 81.00 IS CODE = 21

----------------------------------------------------------------------------

Page 23

PCEX10

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 320.00

ELEVATION DATA: UPSTREAM(FEET) = 243.30 DOWNSTREAM(FEET) = 240.10

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.672

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.176

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

PUBLIC PARK A 0.54 0.40 0.850 32 12.19

COMMERCIAL A 0.12 0.40 0.100 32 7.67

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.714

SUBAREA RUNOFF(CFS) = 1.72

TOTAL AREA(ACRES) = 0.66 PEAK FLOW RATE(CFS) = 1.72

****************************************************************************

FLOW PROCESS FROM NODE 81.00 TO NODE 82.00 IS CODE = 61

----------------------------------------------------------------------------

>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>(STANDARD CURB SECTION USED)<<<<<

============================================================================

UPSTREAM ELEVATION(FEET) = 240.10 DOWNSTREAM ELEVATION(FEET) = 238.80

STREET LENGTH(FEET) = 150.00 CURB HEIGHT(INCHES) = 6.0

STREET HALFWIDTH(FEET) = 40.00

DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 28.00

INSIDE STREET CROSSFALL(DECIMAL) = 0.020

OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020

SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1

STREET PARKWAY CROSSFALL(DECIMAL) = 0.020

Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150

Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200

**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 1.99

STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:

STREET FLOW DEPTH(FEET) = 0.31

HALFSTREET FLOOD WIDTH(FEET) = 9.33

AVERAGE FLOW VELOCITY(FEET/SEC.) = 2.01

PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.63

STREET FLOW TRAVEL TIME(MIN.) = 1.24 Tc(MIN.) = 8.92

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.914

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

PUBLIC PARK A 0.11 0.40 0.850 32

COMMERCIAL A 0.11 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.475

Page 24

PCEX10

SUBAREA AREA(ACRES) = 0.22 SUBAREA RUNOFF(CFS) = 0.54

EFFECTIVE AREA(ACRES) = 0.88 AREA-AVERAGED Fm(INCH/HR) = 0.26

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.65

TOTAL AREA(ACRES) = 0.9 PEAK FLOW RATE(CFS) = 2.10

END OF SUBAREA STREET FLOW HYDRAULICS:

DEPTH(FEET) = 0.32 HALFSTREET FLOOD WIDTH(FEET) = 9.58

FLOW VELOCITY(FEET/SEC.) = 2.03 DEPTH*VELOCITY(FT*FT/SEC.) = 0.64

LONGEST FLOWPATH FROM NODE 80.00 TO NODE 82.00 = 470.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 82.00 TO NODE 83.00 IS CODE = 61

----------------------------------------------------------------------------

>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>(STANDARD CURB SECTION USED)<<<<<

============================================================================

UPSTREAM ELEVATION(FEET) = 238.80 DOWNSTREAM ELEVATION(FEET) = 238.50

STREET LENGTH(FEET) = 90.00 CURB HEIGHT(INCHES) = 8.0

STREET HALFWIDTH(FEET) = 84.00

DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 30.00

INSIDE STREET CROSSFALL(DECIMAL) = 0.020

OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020

SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1

STREET PARKWAY CROSSFALL(DECIMAL) = 0.020

Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150

Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200

**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 2.27

STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:

STREET FLOW DEPTH(FEET) = 0.39

HALFSTREET FLOOD WIDTH(FEET) = 11.72

AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.45

PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.57

STREET FLOW TRAVEL TIME(MIN.) = 1.03 Tc(MIN.) = 9.95

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.737

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

PUBLIC PARK A 0.16 0.40 0.850 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850

SUBAREA AREA(ACRES) = 0.16 SUBAREA RUNOFF(CFS) = 0.35

EFFECTIVE AREA(ACRES) = 1.04 AREA-AVERAGED Fm(INCH/HR) = 0.27

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.68

TOTAL AREA(ACRES) = 1.0 PEAK FLOW RATE(CFS) = 2.31

END OF SUBAREA STREET FLOW HYDRAULICS:

DEPTH(FEET) = 0.39 HALFSTREET FLOOD WIDTH(FEET) = 11.78

FLOW VELOCITY(FEET/SEC.) = 1.46 DEPTH*VELOCITY(FT*FT/SEC.) = 0.58

LONGEST FLOWPATH FROM NODE 80.00 TO NODE 83.00 = 560.00 FEET.

Page 25

PCEX10

****************************************************************************

FLOW PROCESS FROM NODE 90.00 TO NODE 91.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 280.00

ELEVATION DATA: UPSTREAM(FEET) = 241.90 DOWNSTREAM(FEET) = 240.90

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.937

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.910

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.64 0.40 0.100 32 8.94

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 1.65

TOTAL AREA(ACRES) = 0.64 PEAK FLOW RATE(CFS) = 1.65

****************************************************************************

FLOW PROCESS FROM NODE 91.00 TO NODE 92.00 IS CODE = 61

----------------------------------------------------------------------------

>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>(STANDARD CURB SECTION USED)<<<<<

============================================================================

UPSTREAM ELEVATION(FEET) = 240.90 DOWNSTREAM ELEVATION(FEET) = 239.50

STREET LENGTH(FEET) = 270.00 CURB HEIGHT(INCHES) = 6.0

STREET HALFWIDTH(FEET) = 30.00

DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 25.00

INSIDE STREET CROSSFALL(DECIMAL) = 0.020

OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020

SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1

STREET PARKWAY CROSSFALL(DECIMAL) = 0.020

Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150

Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200

**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 2.23

STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:

STREET FLOW DEPTH(FEET) = 0.34

HALFSTREET FLOOD WIDTH(FEET) = 10.91

AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.71

PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.59

STREET FLOW TRAVEL TIME(MIN.) = 2.64 Tc(MIN.) = 11.57

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.510

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.52 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

Page 26

PCEX10

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 0.52 SUBAREA RUNOFF(CFS) = 1.16

EFFECTIVE AREA(ACRES) = 1.16 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 1.2 PEAK FLOW RATE(CFS) = 2.58

END OF SUBAREA STREET FLOW HYDRAULICS:

DEPTH(FEET) = 0.36 HALFSTREET FLOOD WIDTH(FEET) = 11.59

FLOW VELOCITY(FEET/SEC.) = 1.76 DEPTH*VELOCITY(FT*FT/SEC.) = 0.63

LONGEST FLOWPATH FROM NODE 90.00 TO NODE 92.00 = 550.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 92.00 TO NODE 92.00 IS CODE = 10

----------------------------------------------------------------------------

>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<<

============================================================================

****************************************************************************

FLOW PROCESS FROM NODE 100.00 TO NODE 101.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 295.00

ELEVATION DATA: UPSTREAM(FEET) = 241.90 DOWNSTREAM(FEET) = 240.90

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 9.221

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.859

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.79 0.40 0.100 32 9.22

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 2.00

TOTAL AREA(ACRES) = 0.79 PEAK FLOW RATE(CFS) = 2.00

****************************************************************************

FLOW PROCESS FROM NODE 101.00 TO NODE 92.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 9.22

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.859

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.44 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 0.44 SUBAREA RUNOFF(CFS) = 1.12

EFFECTIVE AREA(ACRES) = 1.23 AREA-AVERAGED Fm(INCH/HR) = 0.04

Page 27

PCEX10

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 1.2 PEAK FLOW RATE(CFS) = 3.12

****************************************************************************

FLOW PROCESS FROM NODE 92.00 TO NODE 92.00 IS CODE = 11

----------------------------------------------------------------------------

>>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<<

============================================================================

** MAIN STREAM CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 3.12 9.22 2.859 0.40( 0.04) 0.10 1.2 100.00

LONGEST FLOWPATH FROM NODE 100.00 TO NODE 92.00 = 295.00 FEET.

** MEMORY BANK # 1 CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 2.58 11.57 2.510 0.40( 0.04) 0.10 1.2 90.00

LONGEST FLOWPATH FROM NODE 90.00 TO NODE 92.00 = 550.00 FEET.

** PEAK FLOW RATE TABLE **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 5.46 9.22 2.859 0.40( 0.04) 0.10 2.2 100.00

2 5.31 11.57 2.510 0.40( 0.04) 0.10 2.4 90.00

TOTAL AREA(ACRES) = 2.4

COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:

PEAK FLOW RATE(CFS) = 5.46 Tc(MIN.) = 9.221

EFFECTIVE AREA(ACRES) = 2.15 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 2.4

LONGEST FLOWPATH FROM NODE 90.00 TO NODE 92.00 = 550.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 92.00 TO NODE 93.00 IS CODE = 61

----------------------------------------------------------------------------

>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>(STANDARD CURB SECTION USED)<<<<<

============================================================================

UPSTREAM ELEVATION(FEET) = 239.50 DOWNSTREAM ELEVATION(FEET) = 239.10

STREET LENGTH(FEET) = 100.00 CURB HEIGHT(INCHES) = 6.0

STREET HALFWIDTH(FEET) = 30.00

DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 25.00

INSIDE STREET CROSSFALL(DECIMAL) = 0.020

OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020

SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1

STREET PARKWAY CROSSFALL(DECIMAL) = 0.020

Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150

Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200

Page 28

PCEX10

**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 5.59

STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:

STREET FLOW DEPTH(FEET) = 0.46

HALFSTREET FLOOD WIDTH(FEET) = 16.77

AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.91

PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.88

STREET FLOW TRAVEL TIME(MIN.) = 0.87 Tc(MIN.) = 10.09

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.714

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.10 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 0.10 SUBAREA RUNOFF(CFS) = 0.24

EFFECTIVE AREA(ACRES) = 2.25 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 2.5 PEAK FLOW RATE(CFS) = 5.46

NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE

END OF SUBAREA STREET FLOW HYDRAULICS:

DEPTH(FEET) = 0.46 HALFSTREET FLOOD WIDTH(FEET) = 16.57

FLOW VELOCITY(FEET/SEC.) = 1.91 DEPTH*VELOCITY(FT*FT/SEC.) = 0.87

LONGEST FLOWPATH FROM NODE 90.00 TO NODE 93.00 = 650.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 94.00 TO NODE 95.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 190.00

ELEVATION DATA: UPSTREAM(FEET) = 242.10 DOWNSTREAM(FEET) = 240.10

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.165

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.600

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.39 0.40 0.100 32 6.16

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 1.25

TOTAL AREA(ACRES) = 0.39 PEAK FLOW RATE(CFS) = 1.25

****************************************************************************

FLOW PROCESS FROM NODE 96.00 TO NODE 97.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

Page 29

PCEX10

INITIAL SUBAREA FLOW-LENGTH(FEET) = 200.00

ELEVATION DATA: UPSTREAM(FEET) = 241.30 DOWNSTREAM(FEET) = 240.20

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.165

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.303

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.52 0.40 0.100 32 7.16

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 1.53

TOTAL AREA(ACRES) = 0.52 PEAK FLOW RATE(CFS) = 1.53

****************************************************************************

FLOW PROCESS FROM NODE 98.00 TO NODE 99.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 160.00

ELEVATION DATA: UPSTREAM(FEET) = 241.40 DOWNSTREAM(FEET) = 240.70

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.860

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.387

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 1.06 0.40 0.100 32 6.86

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 3.19

TOTAL AREA(ACRES) = 1.06 PEAK FLOW RATE(CFS) = 3.19

****************************************************************************

FLOW PROCESS FROM NODE 102.00 TO NODE 103.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 150.00

ELEVATION DATA: UPSTREAM(FEET) = 242.40 DOWNSTREAM(FEET) = 241.30

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.029

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.647

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.27 0.40 0.100 32 6.03

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

Page 30

PCEX10

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 0.88

TOTAL AREA(ACRES) = 0.27 PEAK FLOW RATE(CFS) = 0.88

============================================================================

END OF STUDY SUMMARY:

TOTAL AREA(ACRES) = 0.3 TC(MIN.) = 6.03

EFFECTIVE AREA(ACRES) = 0.27 AREA-AVERAGED Fm(INCH/HR)= 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.100

PEAK FLOW RATE(CFS) = 0.88

============================================================================

============================================================================

END OF RATIONAL METHOD ANALYSIS

�

Page 31

HYDROLOGY REPORT August 2017

Pacific Center City of Anaheim, CA

APPENDIX 2.1

25-Year Hydrology Study, Existing Condition

PCEX25

____________________________________________________________________________

****************************************************************************

RATIONAL METHOD HYDROLOGY COMPUTER PROGRAM PACKAGE

(Reference: 1986 ORANGE COUNTY HYDROLOGY CRITERION)

(c) Copyright 1983-2014 Advanced Engineering Software (aes)

Ver. 21.0 Release Date: 06/01/2014 License ID 1355

Analysis prepared by:

Fuscoe Engineering

16795 Von Karman Ave

Suite 100

Irvine CA, 92606

************************** DESCRIPTION OF STUDY **************************

* PACIFIC CENTER - ANAHEIM *

* EXISTING HYDROLOGY *

* 25 YEAR VEVENT *

**************************************************************************

FILE NAME: PCEX25.DAT

TIME/DATE OF STUDY: 11:58 08/01/2017

============================================================================

USER SPECIFIED HYDROLOGY AND HYDRAULIC MODEL INFORMATION:

============================================================================

--*TIME-OF-CONCENTRATION MODEL*--

USER SPECIFIED STORM EVENT(YEAR) = 25.00

SPECIFIED MINIMUM PIPE SIZE(INCH) = 12.00

SPECIFIED PERCENT OF GRADIENTS(DECIMAL) TO USE FOR FRICTION SLOPE = 0.90

*DATA BANK RAINFALL USED*

*ANTECEDENT MOISTURE CONDITION (AMC) II ASSUMED FOR RATIONAL METHOD*

*USER-DEFINED STREET-SECTIONS FOR COUPLED PIPEFLOW AND STREETFLOW MODEL*

HALF- CROWN TO STREET-CROSSFALL: CURB GUTTER-GEOMETRIES: MANNING

WIDTH CROSSFALL IN- / OUT-/PARK- HEIGHT WIDTH LIP HIKE FACTOR

NO. (FT) (FT) SIDE / SIDE/ WAY (FT) (FT) (FT) (FT) (n)

=== ===== ========= ================= ====== ===== ====== ===== =======

1 30.0 20.0 0.018/0.018/0.020 0.67 2.00 0.0312 0.167 0.0150

GLOBAL STREET FLOW-DEPTH CONSTRAINTS:

1. Relative Flow-Depth = 0.00 FEET

as (Maximum Allowable Street Flow Depth) - (Top-of-Curb)

2. (Depth)*(Velocity) Constraint = 6.0 (FT*FT/S)

*PIPE MAY BE SIZED TO HAVE A FLOW CAPACITY LESS THAN

UPSTREAM TRIBUTARY PIPE.*

*USER-SPECIFIED MINIMUM TOPOGRAPHIC SLOPE ADJUSTMENT NOT SELECTED

****************************************************************************

FLOW PROCESS FROM NODE 10.00 TO NODE 11.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

Page 1

PCEX25

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 355.00

ELEVATION DATA: UPSTREAM(FEET) = 243.40 DOWNSTREAM(FEET) = 239.40

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.809

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.748

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.87 0.40 0.100 32 7.81

PUBLIC PARK A 0.22 0.40 0.850 32 12.41

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.251

SUBAREA RUNOFF(CFS) = 3.58

TOTAL AREA(ACRES) = 1.09 PEAK FLOW RATE(CFS) = 3.58

****************************************************************************

FLOW PROCESS FROM NODE 11.00 TO NODE 12.00 IS CODE = 61

----------------------------------------------------------------------------

>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>(STANDARD CURB SECTION USED)<<<<<

============================================================================

UPSTREAM ELEVATION(FEET) = 239.40 DOWNSTREAM ELEVATION(FEET) = 238.50

STREET LENGTH(FEET) = 280.00 CURB HEIGHT(INCHES) = 6.0

STREET HALFWIDTH(FEET) = 40.00

DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 20.00

INSIDE STREET CROSSFALL(DECIMAL) = 0.020

OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020

SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1

STREET PARKWAY CROSSFALL(DECIMAL) = 0.020

Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150

Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200

**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 4.73

STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:

STREET FLOW DEPTH(FEET) = 0.45

HALFSTREET FLOOD WIDTH(FEET) = 16.35

AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.69

PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.77

STREET FLOW TRAVEL TIME(MIN.) = 2.75 Tc(MIN.) = 10.56

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.159

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.54 0.40 0.100 32

PUBLIC PARK A 0.31 0.40 0.850 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.374

SUBAREA AREA(ACRES) = 0.85 SUBAREA RUNOFF(CFS) = 2.30

EFFECTIVE AREA(ACRES) = 1.94 AREA-AVERAGED Fm(INCH/HR) = 0.12

Page 2

PCEX25

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.30

TOTAL AREA(ACRES) = 1.9 PEAK FLOW RATE(CFS) = 5.30

END OF SUBAREA STREET FLOW HYDRAULICS:

DEPTH(FEET) = 0.47 HALFSTREET FLOOD WIDTH(FEET) = 17.07

FLOW VELOCITY(FEET/SEC.) = 1.75 DEPTH*VELOCITY(FT*FT/SEC.) = 0.82

LONGEST FLOWPATH FROM NODE 10.00 TO NODE 12.00 = 635.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 12.00 TO NODE 13.00 IS CODE = 61

----------------------------------------------------------------------------

>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>(STANDARD CURB SECTION USED)<<<<<

============================================================================

UPSTREAM ELEVATION(FEET) = 238.50 DOWNSTREAM ELEVATION(FEET) = 238.00

STREET LENGTH(FEET) = 190.00 CURB HEIGHT(INCHES) = 6.0

STREET HALFWIDTH(FEET) = 30.00

DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 15.00

INSIDE STREET CROSSFALL(DECIMAL) = 0.020

OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020

SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1

STREET PARKWAY CROSSFALL(DECIMAL) = 0.020

Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150

Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200

**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 5.82

STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:

STREET FLOW DEPTH(FEET) = 0.49

HALFSTREET FLOOD WIDTH(FEET) = 18.43

AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.66

PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.82

STREET FLOW TRAVEL TIME(MIN.) = 1.91 Tc(MIN.) = 12.47

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.875

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.21 0.40 0.100 32

PUBLIC PARK A 0.22 0.40 0.850 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.484

SUBAREA AREA(ACRES) = 0.43 SUBAREA RUNOFF(CFS) = 1.04

EFFECTIVE AREA(ACRES) = 2.37 AREA-AVERAGED Fm(INCH/HR) = 0.13

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.34

TOTAL AREA(ACRES) = 2.4 PEAK FLOW RATE(CFS) = 5.84

END OF SUBAREA STREET FLOW HYDRAULICS:

DEPTH(FEET) = 0.50 HALFSTREET FLOOD WIDTH(FEET) = 18.49

FLOW VELOCITY(FEET/SEC.) = 1.65 DEPTH*VELOCITY(FT*FT/SEC.) = 0.82

LONGEST FLOWPATH FROM NODE 10.00 TO NODE 13.00 = 825.00 FEET.

****************************************************************************

Page 3

PCEX25

FLOW PROCESS FROM NODE 13.00 TO NODE 13.00 IS CODE = 10

----------------------------------------------------------------------------

>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<<

============================================================================

****************************************************************************

FLOW PROCESS FROM NODE 20.00 TO NODE 21.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 200.00

ELEVATION DATA: UPSTREAM(FEET) = 240.50 DOWNSTREAM(FEET) = 239.70

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.636

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.796

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.24 0.40 0.100 32 7.64

PUBLIC PARK A 0.14 0.40 0.850 32 12.13

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.376

SUBAREA RUNOFF(CFS) = 1.25

TOTAL AREA(ACRES) = 0.38 PEAK FLOW RATE(CFS) = 1.25

****************************************************************************

FLOW PROCESS FROM NODE 21.00 TO NODE 22.00 IS CODE = 91

----------------------------------------------------------------------------

>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<

============================================================================

UPSTREAM NODE ELEVATION(FEET) = 239.70

DOWNSTREAM NODE ELEVATION(FEET) = 239.20

CHANNEL LENGTH THRU SUBAREA(FEET) = 235.00

"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080

PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150

PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000

MAXIMUM DEPTH(FEET) = 1.00

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.078

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.24 0.40 0.100 32

PUBLIC PARK A 0.54 0.40 0.850 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.619

TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 2.23

TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 1.14

AVERAGE FLOW DEPTH(FEET) = 0.27 FLOOD WIDTH(FEET) = 18.91

"V" GUTTER FLOW TRAVEL TIME(MIN.) = 3.42 Tc(MIN.) = 11.06

SUBAREA AREA(ACRES) = 0.78 SUBAREA RUNOFF(CFS) = 1.99

EFFECTIVE AREA(ACRES) = 1.16 AREA-AVERAGED Fm(INCH/HR) = 0.22

Page 4

PCEX25

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.54

TOTAL AREA(ACRES) = 1.2 PEAK FLOW RATE(CFS) = 2.99

END OF SUBAREA "V" GUTTER HYDRAULICS:

DEPTH(FEET) = 0.30 FLOOD WIDTH(FEET) = 21.51

FLOW VELOCITY(FEET/SEC.) = 1.21 DEPTH*VELOCITY(FT*FT/SEC) = 0.36

LONGEST FLOWPATH FROM NODE 20.00 TO NODE 22.00 = 435.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 22.00 TO NODE 23.00 IS CODE = 61

----------------------------------------------------------------------------

>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>(STANDARD CURB SECTION USED)<<<<<

============================================================================

UPSTREAM ELEVATION(FEET) = 239.20 DOWNSTREAM ELEVATION(FEET) = 238.20

STREET LENGTH(FEET) = 205.00 CURB HEIGHT(INCHES) = 6.0

STREET HALFWIDTH(FEET) = 30.00

DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 15.00

INSIDE STREET CROSSFALL(DECIMAL) = 0.020

OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020

SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1

STREET PARKWAY CROSSFALL(DECIMAL) = 0.020

Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150

Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200

**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 3.60

STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:

STREET FLOW DEPTH(FEET) = 0.40

HALFSTREET FLOOD WIDTH(FEET) = 13.50

AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.86

PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.74

STREET FLOW TRAVEL TIME(MIN.) = 1.84 Tc(MIN.) = 12.90

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.821

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.49 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 0.49 SUBAREA RUNOFF(CFS) = 1.23

EFFECTIVE AREA(ACRES) = 1.65 AREA-AVERAGED Fm(INCH/HR) = 0.16

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.41

TOTAL AREA(ACRES) = 1.7 PEAK FLOW RATE(CFS) = 3.95

END OF SUBAREA STREET FLOW HYDRAULICS:

DEPTH(FEET) = 0.41 HALFSTREET FLOOD WIDTH(FEET) = 13.97

FLOW VELOCITY(FEET/SEC.) = 1.91 DEPTH*VELOCITY(FT*FT/SEC.) = 0.77

LONGEST FLOWPATH FROM NODE 20.00 TO NODE 23.00 = 640.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 23.00 TO NODE 23.00 IS CODE = 10

Page 5

PCEX25

----------------------------------------------------------------------------

>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 2 <<<<<

============================================================================

****************************************************************************

FLOW PROCESS FROM NODE 30.00 TO NODE 31.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 290.00

ELEVATION DATA: UPSTREAM(FEET) = 240.90 DOWNSTREAM(FEET) = 239.60

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.660

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.535

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 1.10 0.40 0.100 32 8.66

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 3.46

TOTAL AREA(ACRES) = 1.10 PEAK FLOW RATE(CFS) = 3.46

****************************************************************************

FLOW PROCESS FROM NODE 31.00 TO NODE 23.00 IS CODE = 61

----------------------------------------------------------------------------

>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>(STANDARD CURB SECTION USED)<<<<<

============================================================================

UPSTREAM ELEVATION(FEET) = 239.60 DOWNSTREAM ELEVATION(FEET) = 238.20

STREET LENGTH(FEET) = 465.00 CURB HEIGHT(INCHES) = 6.0

STREET HALFWIDTH(FEET) = 30.00

DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 15.00

INSIDE STREET CROSSFALL(DECIMAL) = 0.020

OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020

SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1

STREET PARKWAY CROSSFALL(DECIMAL) = 0.020

Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150

Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200

**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 4.79

STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:

STREET FLOW DEPTH(FEET) = 0.46

HALFSTREET FLOOD WIDTH(FEET) = 16.67

AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.65

PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.76

STREET FLOW TRAVEL TIME(MIN.) = 4.69 Tc(MIN.) = 13.35

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.767

SUBAREA LOSS RATE DATA(AMC II):

Page 6

PCEX25

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 1.08 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 1.08 SUBAREA RUNOFF(CFS) = 2.65

EFFECTIVE AREA(ACRES) = 2.18 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 2.2 PEAK FLOW RATE(CFS) = 5.35

END OF SUBAREA STREET FLOW HYDRAULICS:

DEPTH(FEET) = 0.47 HALFSTREET FLOOD WIDTH(FEET) = 17.37

FLOW VELOCITY(FEET/SEC.) = 1.71 DEPTH*VELOCITY(FT*FT/SEC.) = 0.81

LONGEST FLOWPATH FROM NODE 30.00 TO NODE 23.00 = 755.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 23.00 TO NODE 23.00 IS CODE = 11

----------------------------------------------------------------------------

>>>>>CONFLUENCE MEMORY BANK # 2 WITH THE MAIN-STREAM MEMORY<<<<<

============================================================================

** MAIN STREAM CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 5.35 13.35 2.767 0.40( 0.04) 0.10 2.2 30.00

LONGEST FLOWPATH FROM NODE 30.00 TO NODE 23.00 = 755.00 FEET.

** MEMORY BANK # 2 CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 3.95 12.90 2.821 0.40( 0.16) 0.41 1.7 20.00

LONGEST FLOWPATH FROM NODE 20.00 TO NODE 23.00 = 640.00 FEET.

** PEAK FLOW RATE TABLE **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 9.22 12.90 2.821 0.40( 0.09) 0.24 3.8 20.00

2 9.22 13.35 2.767 0.40( 0.09) 0.23 3.8 30.00

TOTAL AREA(ACRES) = 3.8

COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:

PEAK FLOW RATE(CFS) = 9.22 Tc(MIN.) = 12.901

EFFECTIVE AREA(ACRES) = 3.76 AREA-AVERAGED Fm(INCH/HR) = 0.09

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.23

TOTAL AREA(ACRES) = 3.8

LONGEST FLOWPATH FROM NODE 30.00 TO NODE 23.00 = 755.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 23.00 TO NODE 23.00 IS CODE = 12

----------------------------------------------------------------------------

>>>>>CLEAR MEMORY BANK # 2 <<<<<

============================================================================

Page 7

PCEX25

****************************************************************************

FLOW PROCESS FROM NODE 23.00 TO NODE 13.00 IS CODE = 91

----------------------------------------------------------------------------

>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<

============================================================================

UPSTREAM NODE ELEVATION(FEET) = 238.20

DOWNSTREAM NODE ELEVATION(FEET) = 238.00

CHANNEL LENGTH THRU SUBAREA(FEET) = 75.00

"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080

PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150

PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000

MAXIMUM DEPTH(FEET) = 0.75

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.732

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.08 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 9.32

TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 1.67

AVERAGE FLOW DEPTH(FEET) = 0.41 FLOOD WIDTH(FEET) = 32.94

"V" GUTTER FLOW TRAVEL TIME(MIN.) = 0.75 Tc(MIN.) = 13.65

SUBAREA AREA(ACRES) = 0.08 SUBAREA RUNOFF(CFS) = 0.19

EFFECTIVE AREA(ACRES) = 3.84 AREA-AVERAGED Fm(INCH/HR) = 0.09

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.23

TOTAL AREA(ACRES) = 3.9 PEAK FLOW RATE(CFS) = 9.22

NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE

END OF SUBAREA "V" GUTTER HYDRAULICS:

DEPTH(FEET) = 0.41 FLOOD WIDTH(FEET) = 32.81

FLOW VELOCITY(FEET/SEC.) = 1.66 DEPTH*VELOCITY(FT*FT/SEC) = 0.68

LONGEST FLOWPATH FROM NODE 30.00 TO NODE 13.00 = 830.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 13.00 TO NODE 13.00 IS CODE = 11

----------------------------------------------------------------------------

>>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<<

============================================================================

** MAIN STREAM CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 9.22 13.65 2.732 0.40( 0.09) 0.23 3.8 20.00

2 9.22 14.10 2.683 0.40( 0.09) 0.23 3.9 30.00

LONGEST FLOWPATH FROM NODE 30.00 TO NODE 13.00 = 830.00 FEET.

** MEMORY BANK # 1 CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 5.84 12.47 2.875 0.40( 0.13) 0.34 2.4 10.00

LONGEST FLOWPATH FROM NODE 10.00 TO NODE 13.00 = 825.00 FEET.

Page 8

PCEX25

** PEAK FLOW RATE TABLE **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 14.73 12.47 2.875 0.40( 0.11) 0.28 5.9 10.00

2 14.76 13.65 2.732 0.40( 0.11) 0.27 6.2 20.00

3 14.65 14.10 2.683 0.40( 0.11) 0.27 6.3 30.00

TOTAL AREA(ACRES) = 6.3

COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:

PEAK FLOW RATE(CFS) = 14.76 Tc(MIN.) = 13.651

EFFECTIVE AREA(ACRES) = 6.21 AREA-AVERAGED Fm(INCH/HR) = 0.11

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.28

TOTAL AREA(ACRES) = 6.3

LONGEST FLOWPATH FROM NODE 30.00 TO NODE 13.00 = 830.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 13.00 TO NODE 13.00 IS CODE = 12

----------------------------------------------------------------------------

>>>>>CLEAR MEMORY BANK # 1 <<<<<

============================================================================

****************************************************************************

FLOW PROCESS FROM NODE 13.00 TO NODE 14.00 IS CODE = 61

----------------------------------------------------------------------------

>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>(STANDARD CURB SECTION USED)<<<<<

============================================================================

UPSTREAM ELEVATION(FEET) = 238.00 DOWNSTREAM ELEVATION(FEET) = 237.00

STREET LENGTH(FEET) = 320.00 CURB HEIGHT(INCHES) = 6.0

STREET HALFWIDTH(FEET) = 30.00

DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 15.00

INSIDE STREET CROSSFALL(DECIMAL) = 0.020

OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020

SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1

STREET PARKWAY CROSSFALL(DECIMAL) = 0.020

Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150

Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200

**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 15.90

STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:

STREET FLOW DEPTH(FEET) = 0.65

HALFSTREET FLOOD WIDTH(FEET) = 33.40

AVERAGE FLOW VELOCITY(FEET/SEC.) = 2.14

PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 1.38

STREET FLOW TRAVEL TIME(MIN.) = 2.50 Tc(MIN.) = 16.15

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.484

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 1.04 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

Page 9

PCEX25

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 1.04 SUBAREA RUNOFF(CFS) = 2.29

EFFECTIVE AREA(ACRES) = 7.25 AREA-AVERAGED Fm(INCH/HR) = 0.10

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.25

TOTAL AREA(ACRES) = 7.3 PEAK FLOW RATE(CFS) = 15.56

END OF SUBAREA STREET FLOW HYDRAULICS:

DEPTH(FEET) = 0.64 HALFSTREET FLOOD WIDTH(FEET) = 32.93

FLOW VELOCITY(FEET/SEC.) = 2.13 DEPTH*VELOCITY(FT*FT/SEC.) = 1.37

LONGEST FLOWPATH FROM NODE 30.00 TO NODE 14.00 = 1150.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 14.00 TO NODE 14.00 IS CODE = 10

----------------------------------------------------------------------------

>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<<

============================================================================

****************************************************************************

FLOW PROCESS FROM NODE 40.00 TO NODE 41.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 290.00

ELEVATION DATA: UPSTREAM(FEET) = 241.70 DOWNSTREAM(FEET) = 240.70

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 9.127

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.431

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.68 0.40 0.100 32 9.13

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 2.08

TOTAL AREA(ACRES) = 0.68 PEAK FLOW RATE(CFS) = 2.08

****************************************************************************

FLOW PROCESS FROM NODE 41.00 TO NODE 42.00 IS CODE = 61

----------------------------------------------------------------------------

>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>(STANDARD CURB SECTION USED)<<<<<

============================================================================

UPSTREAM ELEVATION(FEET) = 240.70 DOWNSTREAM ELEVATION(FEET) = 239.50

STREET LENGTH(FEET) = 260.00 CURB HEIGHT(INCHES) = 6.0

STREET HALFWIDTH(FEET) = 30.00

DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 15.00

INSIDE STREET CROSSFALL(DECIMAL) = 0.020

OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020

SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1

Page 10

PCEX25

STREET PARKWAY CROSSFALL(DECIMAL) = 0.020

Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150

Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200

**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 2.41

STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:

STREET FLOW DEPTH(FEET) = 0.36

HALFSTREET FLOOD WIDTH(FEET) = 11.55

AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.66

PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.59

STREET FLOW TRAVEL TIME(MIN.) = 2.61 Tc(MIN.) = 11.74

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.975

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.25 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 0.25 SUBAREA RUNOFF(CFS) = 0.66

EFFECTIVE AREA(ACRES) = 0.93 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 0.9 PEAK FLOW RATE(CFS) = 2.46

END OF SUBAREA STREET FLOW HYDRAULICS:

DEPTH(FEET) = 0.36 HALFSTREET FLOOD WIDTH(FEET) = 11.65

FLOW VELOCITY(FEET/SEC.) = 1.66 DEPTH*VELOCITY(FT*FT/SEC.) = 0.60

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 42.00 = 550.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 42.00 TO NODE 42.00 IS CODE = 10

----------------------------------------------------------------------------

>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 3 <<<<<

============================================================================

****************************************************************************

FLOW PROCESS FROM NODE 43.00 TO NODE 44.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 330.00

ELEVATION DATA: UPSTREAM(FEET) = 241.50 DOWNSTREAM(FEET) = 240.20

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 9.358

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.383

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 1.73 0.40 0.100 32 9.36

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 5.21

Page 11

PCEX25

TOTAL AREA(ACRES) = 1.73 PEAK FLOW RATE(CFS) = 5.21

****************************************************************************

FLOW PROCESS FROM NODE 44.00 TO NODE 42.00 IS CODE = 91

----------------------------------------------------------------------------

>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<

============================================================================

UPSTREAM NODE ELEVATION(FEET) = 240.20

DOWNSTREAM NODE ELEVATION(FEET) = 239.50

CHANNEL LENGTH THRU SUBAREA(FEET) = 155.00

"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080

PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150

PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000

MAXIMUM DEPTH(FEET) = 0.75

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.135

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 1.17 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 6.84

TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 1.92

AVERAGE FLOW DEPTH(FEET) = 0.34 FLOOD WIDTH(FEET) = 26.06

"V" GUTTER FLOW TRAVEL TIME(MIN.) = 1.35 Tc(MIN.) = 10.70

SUBAREA AREA(ACRES) = 1.17 SUBAREA RUNOFF(CFS) = 3.26

EFFECTIVE AREA(ACRES) = 2.90 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 2.9 PEAK FLOW RATE(CFS) = 8.08

END OF SUBAREA "V" GUTTER HYDRAULICS:

DEPTH(FEET) = 0.36 FLOOD WIDTH(FEET) = 27.94

FLOW VELOCITY(FEET/SEC.) = 1.99 DEPTH*VELOCITY(FT*FT/SEC) = 0.71

LONGEST FLOWPATH FROM NODE 43.00 TO NODE 42.00 = 485.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 42.00 TO NODE 42.00 IS CODE = 11

----------------------------------------------------------------------------

>>>>>CONFLUENCE MEMORY BANK # 3 WITH THE MAIN-STREAM MEMORY<<<<<

============================================================================

** MAIN STREAM CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 8.08 10.70 3.135 0.40( 0.04) 0.10 2.9 43.00

LONGEST FLOWPATH FROM NODE 43.00 TO NODE 42.00 = 485.00 FEET.

** MEMORY BANK # 3 CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 2.46 11.74 2.975 0.40( 0.04) 0.10 0.9 40.00

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 42.00 = 550.00 FEET.

Page 12

PCEX25

** PEAK FLOW RATE TABLE **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 10.44 10.70 3.135 0.40( 0.04) 0.10 3.7 43.00

2 10.12 11.74 2.975 0.40( 0.04) 0.10 3.8 40.00

TOTAL AREA(ACRES) = 3.8

COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:

PEAK FLOW RATE(CFS) = 10.44 Tc(MIN.) = 10.704

EFFECTIVE AREA(ACRES) = 3.75 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 3.8

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 42.00 = 550.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 42.00 TO NODE 42.00 IS CODE = 12

----------------------------------------------------------------------------

>>>>>CLEAR MEMORY BANK # 3 <<<<<

============================================================================

****************************************************************************

FLOW PROCESS FROM NODE 42.00 TO NODE 45.00 IS CODE = 91

----------------------------------------------------------------------------

>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<

============================================================================

UPSTREAM NODE ELEVATION(FEET) = 239.50

DOWNSTREAM NODE ELEVATION(FEET) = 239.20

CHANNEL LENGTH THRU SUBAREA(FEET) = 50.00

"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080

PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150

PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000

MAXIMUM DEPTH(FEET) = 0.50

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.078

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.28 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 10.82

TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 2.36

AVERAGE FLOW DEPTH(FEET) = 0.38 FLOOD WIDTH(FEET) = 29.74

"V" GUTTER FLOW TRAVEL TIME(MIN.) = 0.35 Tc(MIN.) = 11.06

SUBAREA AREA(ACRES) = 0.28 SUBAREA RUNOFF(CFS) = 0.77

EFFECTIVE AREA(ACRES) = 4.03 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 4.1 PEAK FLOW RATE(CFS) = 11.01

END OF SUBAREA "V" GUTTER HYDRAULICS:

DEPTH(FEET) = 0.38 FLOOD WIDTH(FEET) = 29.89

FLOW VELOCITY(FEET/SEC.) = 2.38 DEPTH*VELOCITY(FT*FT/SEC) = 0.90

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 45.00 = 600.00 FEET.

Page 13

PCEX25

****************************************************************************

FLOW PROCESS FROM NODE 45.00 TO NODE 46.00 IS CODE = 91

----------------------------------------------------------------------------

>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<

============================================================================

UPSTREAM NODE ELEVATION(FEET) = 239.20

DOWNSTREAM NODE ELEVATION(FEET) = 238.00

CHANNEL LENGTH THRU SUBAREA(FEET) = 330.00

"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080

PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150

PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000

MAXIMUM DEPTH(FEET) = 0.50

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.714

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.70 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 11.85

TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 1.99

AVERAGE FLOW DEPTH(FEET) = 0.42 FLOOD WIDTH(FEET) = 34.00

"V" GUTTER FLOW TRAVEL TIME(MIN.) = 2.76 Tc(MIN.) = 13.82

SUBAREA AREA(ACRES) = 0.70 SUBAREA RUNOFF(CFS) = 1.68

EFFECTIVE AREA(ACRES) = 4.73 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 4.8 PEAK FLOW RATE(CFS) = 11.38

END OF SUBAREA "V" GUTTER HYDRAULICS:

DEPTH(FEET) = 0.42 FLOOD WIDTH(FEET) = 33.54

FLOW VELOCITY(FEET/SEC.) = 1.96 DEPTH*VELOCITY(FT*FT/SEC) = 0.82

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 46.00 = 930.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 46.00 TO NODE 47.00 IS CODE = 91

----------------------------------------------------------------------------

>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<

============================================================================

UPSTREAM NODE ELEVATION(FEET) = 238.00

DOWNSTREAM NODE ELEVATION(FEET) = 237.60

CHANNEL LENGTH THRU SUBAREA(FEET) = 170.00

"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080

PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150

PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000

MAXIMUM DEPTH(FEET) = 0.50

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.544

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 1.10 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 12.62

Page 14

PCEX25

TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 1.70

AVERAGE FLOW DEPTH(FEET) = 0.46 FLOOD WIDTH(FEET) = 38.12

"V" GUTTER FLOW TRAVEL TIME(MIN.) = 1.67 Tc(MIN.) = 15.48

SUBAREA AREA(ACRES) = 1.10 SUBAREA RUNOFF(CFS) = 2.48

EFFECTIVE AREA(ACRES) = 5.83 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 5.9 PEAK FLOW RATE(CFS) = 13.13

END OF SUBAREA "V" GUTTER HYDRAULICS:

DEPTH(FEET) = 0.47 FLOOD WIDTH(FEET) = 38.72

FLOW VELOCITY(FEET/SEC.) = 1.71 DEPTH*VELOCITY(FT*FT/SEC) = 0.80

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 47.00 = 1100.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 47.00 TO NODE 47.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 15.48

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.544

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.33 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 0.33 SUBAREA RUNOFF(CFS) = 0.74

EFFECTIVE AREA(ACRES) = 6.16 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 6.2 PEAK FLOW RATE(CFS) = 13.88

****************************************************************************

FLOW PROCESS FROM NODE 47.00 TO NODE 14.00 IS CODE = 91

----------------------------------------------------------------------------

>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<

============================================================================

UPSTREAM NODE ELEVATION(FEET) = 237.60

DOWNSTREAM NODE ELEVATION(FEET) = 237.00

CHANNEL LENGTH THRU SUBAREA(FEET) = 220.00

"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080

PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150

PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000

MAXIMUM DEPTH(FEET) = 1.00

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.378

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.50 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 14.40

TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 1.86

AVERAGE FLOW DEPTH(FEET) = 0.47 FLOOD WIDTH(FEET) = 38.90

Page 15

PCEX25

"V" GUTTER FLOW TRAVEL TIME(MIN.) = 1.97 Tc(MIN.) = 17.45

SUBAREA AREA(ACRES) = 0.50 SUBAREA RUNOFF(CFS) = 1.05

EFFECTIVE AREA(ACRES) = 6.66 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 6.7 PEAK FLOW RATE(CFS) = 14.01

END OF SUBAREA "V" GUTTER HYDRAULICS:

DEPTH(FEET) = 0.47 FLOOD WIDTH(FEET) = 38.55

FLOW VELOCITY(FEET/SEC.) = 1.84 DEPTH*VELOCITY(FT*FT/SEC) = 0.86

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 14.00 = 1320.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 14.00 TO NODE 14.00 IS CODE = 11

----------------------------------------------------------------------------

>>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<<

============================================================================

** MAIN STREAM CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 14.01 17.45 2.378 0.40( 0.04) 0.10 6.7 43.00

2 13.69 18.55 2.297 0.40( 0.04) 0.10 6.7 40.00

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 14.00 = 1320.00 FEET.

** MEMORY BANK # 1 CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 15.52 14.97 2.593 0.40( 0.10) 0.25 6.9 10.00

2 15.56 16.15 2.484 0.40( 0.10) 0.25 7.2 20.00

3 15.47 16.59 2.447 0.40( 0.10) 0.25 7.3 30.00

LONGEST FLOWPATH FROM NODE 30.00 TO NODE 14.00 = 1150.00 FEET.

** PEAK FLOW RATE TABLE **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 28.65 14.97 2.593 0.40( 0.07) 0.18 12.6 10.00

2 29.11 16.15 2.484 0.40( 0.07) 0.18 13.4 20.00

3 29.18 16.59 2.447 0.40( 0.07) 0.18 13.6 30.00

4 29.02 17.45 2.378 0.40( 0.07) 0.18 14.0 43.00

5 28.17 18.55 2.297 0.40( 0.07) 0.18 14.1 40.00

TOTAL AREA(ACRES) = 14.1

COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:

PEAK FLOW RATE(CFS) = 29.18 Tc(MIN.) = 16.586

EFFECTIVE AREA(ACRES) = 13.65 AREA-AVERAGED Fm(INCH/HR) = 0.07

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.18

TOTAL AREA(ACRES) = 14.1

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 14.00 = 1320.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 14.00 TO NODE 14.00 IS CODE = 12

----------------------------------------------------------------------------

>>>>>CLEAR MEMORY BANK # 1 <<<<<

Page 16

PCEX25

============================================================================

****************************************************************************

FLOW PROCESS FROM NODE 14.00 TO NODE 15.00 IS CODE = 52

----------------------------------------------------------------------------

>>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<

>>>>>TRAVELTIME THRU SUBAREA<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 237.00 DOWNSTREAM(FEET) = 235.10

CHANNEL LENGTH THRU SUBAREA(FEET) = 145.00 CHANNEL SLOPE = 0.0131

CHANNEL FLOW THRU SUBAREA(CFS) = 29.18

FLOW VELOCITY(FEET/SEC) = 3.80 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL)

TRAVEL TIME(MIN.) = 0.64 Tc(MIN.) = 17.22

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 15.00 = 1465.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 15.00 TO NODE 15.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 17.22

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.395

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

PUBLIC PARK A 0.16 0.40 0.850 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850

SUBAREA AREA(ACRES) = 0.16 SUBAREA RUNOFF(CFS) = 0.30

EFFECTIVE AREA(ACRES) = 13.81 AREA-AVERAGED Fm(INCH/HR) = 0.07

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.19

TOTAL AREA(ACRES) = 14.2 PEAK FLOW RATE(CFS) = 29.18

NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE

****************************************************************************

FLOW PROCESS FROM NODE 15.00 TO NODE 15.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 17.22

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.395

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 1.25 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 1.25 SUBAREA RUNOFF(CFS) = 2.65

EFFECTIVE AREA(ACRES) = 15.06 AREA-AVERAGED Fm(INCH/HR) = 0.07

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.18

TOTAL AREA(ACRES) = 15.5 PEAK FLOW RATE(CFS) = 31.49

****************************************************************************

Page 17

PCEX25

FLOW PROCESS FROM NODE 15.00 TO NODE 16.00 IS CODE = 52

----------------------------------------------------------------------------

>>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<

>>>>>TRAVELTIME THRU SUBAREA<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 235.10 DOWNSTREAM(FEET) = 234.10

CHANNEL LENGTH THRU SUBAREA(FEET) = 205.00 CHANNEL SLOPE = 0.0049

CHANNEL FLOW THRU SUBAREA(CFS) = 31.49

FLOW VELOCITY(FEET/SEC) = 2.37 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL)

TRAVEL TIME(MIN.) = 1.44 Tc(MIN.) = 18.66

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 16.00 = 1670.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 16.00 TO NODE 16.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 18.66

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.289

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

PUBLIC PARK A 0.30 0.40 0.850 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850

SUBAREA AREA(ACRES) = 0.30 SUBAREA RUNOFF(CFS) = 0.53

EFFECTIVE AREA(ACRES) = 15.36 AREA-AVERAGED Fm(INCH/HR) = 0.08

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.19

TOTAL AREA(ACRES) = 15.8 PEAK FLOW RATE(CFS) = 31.49

NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE

****************************************************************************

FLOW PROCESS FROM NODE 16.00 TO NODE 16.00 IS CODE = 10

----------------------------------------------------------------------------

>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 3 <<<<<

============================================================================

****************************************************************************

FLOW PROCESS FROM NODE 50.00 TO NODE 51.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 245.00

ELEVATION DATA: UPSTREAM(FEET) = 241.50 DOWNSTREAM(FEET) = 240.50

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.248

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.634

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.84 0.40 0.100 32 8.25

Page 18

PCEX25

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 2.72

TOTAL AREA(ACRES) = 0.84 PEAK FLOW RATE(CFS) = 2.72

****************************************************************************

FLOW PROCESS FROM NODE 51.00 TO NODE 52.00 IS CODE = 41

----------------------------------------------------------------------------

>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 238.00 DOWNSTREAM(FEET) = 237.50

FLOW LENGTH(FEET) = 125.00 MANNING'S N = 0.011

ASSUME FULL-FLOWING PIPELINE

PIPE-FLOW VELOCITY(FEET/SEC.) = 3.46

PIPE FLOW VELOCITY = (TOTAL FLOW)/(PIPE CROSS SECTION AREA)

GIVEN PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1

PIPE-FLOW(CFS) = 2.72

PIPE TRAVEL TIME(MIN.) = 0.60 Tc(MIN.) = 8.85

LONGEST FLOWPATH FROM NODE 50.00 TO NODE 52.00 = 370.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 52.00 TO NODE 52.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 8.85

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.491

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 1.28 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 1.28 SUBAREA RUNOFF(CFS) = 3.98

EFFECTIVE AREA(ACRES) = 2.12 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 2.1 PEAK FLOW RATE(CFS) = 6.59

****************************************************************************

FLOW PROCESS FROM NODE 52.00 TO NODE 53.00 IS CODE = 41

----------------------------------------------------------------------------

>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 237.50 DOWNSTREAM(FEET) = 236.50

FLOW LENGTH(FEET) = 330.00 MANNING'S N = 0.011

ASSUME FULL-FLOWING PIPELINE

PIPE-FLOW VELOCITY(FEET/SEC.) = 8.38

PIPE FLOW VELOCITY = (TOTAL FLOW)/(PIPE CROSS SECTION AREA)

GIVEN PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1

PIPE-FLOW(CFS) = 6.59

PIPE TRAVEL TIME(MIN.) = 0.66 Tc(MIN.) = 9.51

Page 19

PCEX25

LONGEST FLOWPATH FROM NODE 50.00 TO NODE 53.00 = 700.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 53.00 TO NODE 53.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 9.51

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.353

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 1.63 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 1.63 SUBAREA RUNOFF(CFS) = 4.86

EFFECTIVE AREA(ACRES) = 3.75 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 3.8 PEAK FLOW RATE(CFS) = 11.18

****************************************************************************

FLOW PROCESS FROM NODE 53.00 TO NODE 54.00 IS CODE = 41

----------------------------------------------------------------------------

>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 236.50 DOWNSTREAM(FEET) = 236.30

FLOW LENGTH(FEET) = 30.00 MANNING'S N = 0.011

ASSUME FULL-FLOWING PIPELINE

PIPE-FLOW VELOCITY(FEET/SEC.) = 14.24

PIPE FLOW VELOCITY = (TOTAL FLOW)/(PIPE CROSS SECTION AREA)

GIVEN PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1

PIPE-FLOW(CFS) = 11.18

PIPE TRAVEL TIME(MIN.) = 0.04 Tc(MIN.) = 9.54

LONGEST FLOWPATH FROM NODE 50.00 TO NODE 54.00 = 730.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 54.00 TO NODE 54.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 9.54

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.346

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.49 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 0.49 SUBAREA RUNOFF(CFS) = 1.46

EFFECTIVE AREA(ACRES) = 4.24 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 4.2 PEAK FLOW RATE(CFS) = 12.62

Page 20

PCEX25

****************************************************************************

FLOW PROCESS FROM NODE 54.00 TO NODE 55.00 IS CODE = 52

----------------------------------------------------------------------------

>>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<

>>>>>TRAVELTIME THRU SUBAREA<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 236.30 DOWNSTREAM(FEET) = 235.50

CHANNEL LENGTH THRU SUBAREA(FEET) = 160.00 CHANNEL SLOPE = 0.0050

CHANNEL FLOW THRU SUBAREA(CFS) = 12.62

FLOW VELOCITY(FEET/SEC) = 1.88 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL)

TRAVEL TIME(MIN.) = 1.42 Tc(MIN.) = 10.96

LONGEST FLOWPATH FROM NODE 50.00 TO NODE 55.00 = 890.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 55.00 TO NODE 55.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 10.96

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.093

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.31 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 0.31 SUBAREA RUNOFF(CFS) = 0.85

EFFECTIVE AREA(ACRES) = 4.55 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 4.5 PEAK FLOW RATE(CFS) = 12.62

NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE

****************************************************************************

FLOW PROCESS FROM NODE 55.00 TO NODE 55.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 10.96

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.093

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

PUBLIC PARK A 0.19 0.40 0.850 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850

SUBAREA AREA(ACRES) = 0.19 SUBAREA RUNOFF(CFS) = 0.47

EFFECTIVE AREA(ACRES) = 4.74 AREA-AVERAGED Fm(INCH/HR) = 0.05

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.13

TOTAL AREA(ACRES) = 4.7 PEAK FLOW RATE(CFS) = 12.97

****************************************************************************

FLOW PROCESS FROM NODE 55.00 TO NODE 16.00 IS CODE = 52

Page 21

PCEX25

----------------------------------------------------------------------------

>>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<

>>>>>TRAVELTIME THRU SUBAREA<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 235.50 DOWNSTREAM(FEET) = 234.10

CHANNEL LENGTH THRU SUBAREA(FEET) = 255.00 CHANNEL SLOPE = 0.0055

CHANNEL FLOW THRU SUBAREA(CFS) = 12.97

FLOW VELOCITY(FEET/SEC) = 1.98 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL)

TRAVEL TIME(MIN.) = 2.15 Tc(MIN.) = 13.11

LONGEST FLOWPATH FROM NODE 50.00 TO NODE 16.00 = 1145.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 16.00 TO NODE 16.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 13.11

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.795

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

PUBLIC PARK A 0.29 0.40 0.850 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850

SUBAREA AREA(ACRES) = 0.29 SUBAREA RUNOFF(CFS) = 0.64

EFFECTIVE AREA(ACRES) = 5.03 AREA-AVERAGED Fm(INCH/HR) = 0.07

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.17

TOTAL AREA(ACRES) = 5.0 PEAK FLOW RATE(CFS) = 12.97

NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE

****************************************************************************

FLOW PROCESS FROM NODE 16.00 TO NODE 16.00 IS CODE = 11

----------------------------------------------------------------------------

>>>>>CONFLUENCE MEMORY BANK # 3 WITH THE MAIN-STREAM MEMORY<<<<<

============================================================================

** MAIN STREAM CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 12.97 13.11 2.795 0.40( 0.07) 0.17 5.0 50.00

LONGEST FLOWPATH FROM NODE 50.00 TO NODE 16.00 = 1145.00 FEET.

** MEMORY BANK # 3 CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 31.08 17.05 2.409 0.40( 0.08) 0.20 14.3 10.00

2 31.45 18.22 2.320 0.40( 0.08) 0.19 15.1 20.00

3 31.49 18.66 2.289 0.40( 0.08) 0.19 15.4 30.00

4 31.28 19.53 2.231 0.40( 0.08) 0.19 15.7 43.00

5 30.38 20.65 2.162 0.40( 0.08) 0.19 15.8 40.00

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 16.00 = 1670.00 FEET.

** PEAK FLOW RATE TABLE **

Page 22

PCEX25

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 40.83 13.11 2.795 0.40( 0.08) 0.19 16.1 50.00

2 42.21 17.05 2.409 0.40( 0.08) 0.19 19.4 10.00

3 42.16 18.22 2.320 0.40( 0.08) 0.19 20.1 20.00

4 42.06 18.66 2.289 0.40( 0.07) 0.19 20.4 30.00

5 41.57 19.53 2.231 0.40( 0.07) 0.19 20.7 43.00

6 40.34 20.65 2.162 0.40( 0.07) 0.19 20.8 40.00

TOTAL AREA(ACRES) = 20.8

COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:

PEAK FLOW RATE(CFS) = 42.21 Tc(MIN.) = 17.053

EFFECTIVE AREA(ACRES) = 19.37 AREA-AVERAGED Fm(INCH/HR) = 0.08

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.19

TOTAL AREA(ACRES) = 20.8

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 16.00 = 1670.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 16.00 TO NODE 17.00 IS CODE = 41

----------------------------------------------------------------------------

>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 234.10 DOWNSTREAM(FEET) = 233.20

FLOW LENGTH(FEET) = 55.00 MANNING'S N = 0.013

DEPTH OF FLOW IN 24.0 INCH PIPE IS 15.8 INCHES

PIPE-FLOW VELOCITY(FEET/SEC.) = 9.64

GIVEN PIPE DIAMETER(INCH) = 24.00 NUMBER OF PIPES = 2

PIPE-FLOW(CFS) = 42.21

PIPE TRAVEL TIME(MIN.) = 0.10 Tc(MIN.) = 17.15

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 17.00 = 1725.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 17.00 TO NODE 17.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 17.15

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.401

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

PUBLIC PARK A 0.53 0.40 0.850 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850

SUBAREA AREA(ACRES) = 0.53 SUBAREA RUNOFF(CFS) = 0.98

EFFECTIVE AREA(ACRES) = 19.90 AREA-AVERAGED Fm(INCH/HR) = 0.08

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.21

TOTAL AREA(ACRES) = 21.3 PEAK FLOW RATE(CFS) = 42.21

NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE

****************************************************************************

FLOW PROCESS FROM NODE 80.00 TO NODE 81.00 IS CODE = 21

Page 23

PCEX25

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 320.00

ELEVATION DATA: UPSTREAM(FEET) = 243.30 DOWNSTREAM(FEET) = 240.10

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.672

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.786

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

PUBLIC PARK A 0.54 0.40 0.850 32 12.19

COMMERCIAL A 0.12 0.40 0.100 32 7.67

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.714

SUBAREA RUNOFF(CFS) = 2.08

TOTAL AREA(ACRES) = 0.66 PEAK FLOW RATE(CFS) = 2.08

****************************************************************************

FLOW PROCESS FROM NODE 81.00 TO NODE 82.00 IS CODE = 61

----------------------------------------------------------------------------

>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>(STANDARD CURB SECTION USED)<<<<<

============================================================================

UPSTREAM ELEVATION(FEET) = 240.10 DOWNSTREAM ELEVATION(FEET) = 238.80

STREET LENGTH(FEET) = 150.00 CURB HEIGHT(INCHES) = 6.0

STREET HALFWIDTH(FEET) = 40.00

DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 28.00

INSIDE STREET CROSSFALL(DECIMAL) = 0.020

OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020

SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1

STREET PARKWAY CROSSFALL(DECIMAL) = 0.020

Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150

Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200

**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 2.41

STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:

STREET FLOW DEPTH(FEET) = 0.33

HALFSTREET FLOOD WIDTH(FEET) = 10.15

AVERAGE FLOW VELOCITY(FEET/SEC.) = 2.09

PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.69

STREET FLOW TRAVEL TIME(MIN.) = 1.19 Tc(MIN.) = 8.87

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.488

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

PUBLIC PARK A 0.11 0.40 0.850 32

COMMERCIAL A 0.11 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

Page 24

PCEX25

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.475

SUBAREA AREA(ACRES) = 0.22 SUBAREA RUNOFF(CFS) = 0.65

EFFECTIVE AREA(ACRES) = 0.88 AREA-AVERAGED Fm(INCH/HR) = 0.26

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.65

TOTAL AREA(ACRES) = 0.9 PEAK FLOW RATE(CFS) = 2.56

END OF SUBAREA STREET FLOW HYDRAULICS:

DEPTH(FEET) = 0.33 HALFSTREET FLOOD WIDTH(FEET) = 10.40

FLOW VELOCITY(FEET/SEC.) = 2.13 DEPTH*VELOCITY(FT*FT/SEC.) = 0.71

LONGEST FLOWPATH FROM NODE 80.00 TO NODE 82.00 = 470.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 82.00 TO NODE 83.00 IS CODE = 61

----------------------------------------------------------------------------

>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>(STANDARD CURB SECTION USED)<<<<<

============================================================================

UPSTREAM ELEVATION(FEET) = 238.80 DOWNSTREAM ELEVATION(FEET) = 238.50

STREET LENGTH(FEET) = 90.00 CURB HEIGHT(INCHES) = 8.0

STREET HALFWIDTH(FEET) = 84.00

DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 30.00

INSIDE STREET CROSSFALL(DECIMAL) = 0.020

OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020

SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1

STREET PARKWAY CROSSFALL(DECIMAL) = 0.020

Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150

Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200

**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 2.77

STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:

STREET FLOW DEPTH(FEET) = 0.41

HALFSTREET FLOOD WIDTH(FEET) = 12.74

AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.53

PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.63

STREET FLOW TRAVEL TIME(MIN.) = 0.98 Tc(MIN.) = 9.85

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.287

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

PUBLIC PARK A 0.16 0.40 0.850 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850

SUBAREA AREA(ACRES) = 0.16 SUBAREA RUNOFF(CFS) = 0.42

EFFECTIVE AREA(ACRES) = 1.04 AREA-AVERAGED Fm(INCH/HR) = 0.27

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.68

TOTAL AREA(ACRES) = 1.0 PEAK FLOW RATE(CFS) = 2.82

END OF SUBAREA STREET FLOW HYDRAULICS:

DEPTH(FEET) = 0.42 HALFSTREET FLOOD WIDTH(FEET) = 12.84

FLOW VELOCITY(FEET/SEC.) = 1.53 DEPTH*VELOCITY(FT*FT/SEC.) = 0.64

LONGEST FLOWPATH FROM NODE 80.00 TO NODE 83.00 = 560.00 FEET.

Page 25

PCEX25

****************************************************************************

FLOW PROCESS FROM NODE 90.00 TO NODE 91.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 280.00

ELEVATION DATA: UPSTREAM(FEET) = 241.90 DOWNSTREAM(FEET) = 240.90

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.937

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.472

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.64 0.40 0.100 32 8.94

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 1.98

TOTAL AREA(ACRES) = 0.64 PEAK FLOW RATE(CFS) = 1.98

****************************************************************************

FLOW PROCESS FROM NODE 91.00 TO NODE 92.00 IS CODE = 61

----------------------------------------------------------------------------

>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>(STANDARD CURB SECTION USED)<<<<<

============================================================================

UPSTREAM ELEVATION(FEET) = 240.90 DOWNSTREAM ELEVATION(FEET) = 239.50

STREET LENGTH(FEET) = 270.00 CURB HEIGHT(INCHES) = 6.0

STREET HALFWIDTH(FEET) = 30.00

DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 25.00

INSIDE STREET CROSSFALL(DECIMAL) = 0.020

OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020

SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1

STREET PARKWAY CROSSFALL(DECIMAL) = 0.020

Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150

Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200

**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 2.67

STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:

STREET FLOW DEPTH(FEET) = 0.36

HALFSTREET FLOOD WIDTH(FEET) = 11.79

AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.77

PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.64

STREET FLOW TRAVEL TIME(MIN.) = 2.54 Tc(MIN.) = 11.47

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.014

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.52 0.40 0.100 32

Page 26

PCEX25

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 0.52 SUBAREA RUNOFF(CFS) = 1.39

EFFECTIVE AREA(ACRES) = 1.16 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 1.2 PEAK FLOW RATE(CFS) = 3.11

END OF SUBAREA STREET FLOW HYDRAULICS:

DEPTH(FEET) = 0.38 HALFSTREET FLOOD WIDTH(FEET) = 12.57

FLOW VELOCITY(FEET/SEC.) = 1.83 DEPTH*VELOCITY(FT*FT/SEC.) = 0.69

LONGEST FLOWPATH FROM NODE 90.00 TO NODE 92.00 = 550.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 92.00 TO NODE 92.00 IS CODE = 10

----------------------------------------------------------------------------

>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<<

============================================================================

****************************************************************************

FLOW PROCESS FROM NODE 100.00 TO NODE 101.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 295.00

ELEVATION DATA: UPSTREAM(FEET) = 241.90 DOWNSTREAM(FEET) = 240.90

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 9.221

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.411

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.79 0.40 0.100 32 9.22

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 2.40

TOTAL AREA(ACRES) = 0.79 PEAK FLOW RATE(CFS) = 2.40

****************************************************************************

FLOW PROCESS FROM NODE 101.00 TO NODE 92.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 9.22

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.411

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.44 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 0.44 SUBAREA RUNOFF(CFS) = 1.34

Page 27

PCEX25

EFFECTIVE AREA(ACRES) = 1.23 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 1.2 PEAK FLOW RATE(CFS) = 3.73

****************************************************************************

FLOW PROCESS FROM NODE 92.00 TO NODE 92.00 IS CODE = 11

----------------------------------------------------------------------------

>>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<<

============================================================================

** MAIN STREAM CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 3.73 9.22 3.411 0.40( 0.04) 0.10 1.2 100.00

LONGEST FLOWPATH FROM NODE 100.00 TO NODE 92.00 = 295.00 FEET.

** MEMORY BANK # 1 CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 3.11 11.47 3.014 0.40( 0.04) 0.10 1.2 90.00

LONGEST FLOWPATH FROM NODE 90.00 TO NODE 92.00 = 550.00 FEET.

** PEAK FLOW RATE TABLE **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 6.56 9.22 3.411 0.40( 0.04) 0.10 2.2 100.00

2 6.40 11.47 3.014 0.40( 0.04) 0.10 2.4 90.00

TOTAL AREA(ACRES) = 2.4

COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:

PEAK FLOW RATE(CFS) = 6.56 Tc(MIN.) = 9.221

EFFECTIVE AREA(ACRES) = 2.16 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 2.4

LONGEST FLOWPATH FROM NODE 90.00 TO NODE 92.00 = 550.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 92.00 TO NODE 93.00 IS CODE = 61

----------------------------------------------------------------------------

>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>(STANDARD CURB SECTION USED)<<<<<

============================================================================

UPSTREAM ELEVATION(FEET) = 239.50 DOWNSTREAM ELEVATION(FEET) = 239.10

STREET LENGTH(FEET) = 100.00 CURB HEIGHT(INCHES) = 6.0

STREET HALFWIDTH(FEET) = 30.00

DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 25.00

INSIDE STREET CROSSFALL(DECIMAL) = 0.020

OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020

SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1

STREET PARKWAY CROSSFALL(DECIMAL) = 0.020

Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150

Page 28

PCEX25

Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200

**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 6.71

STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:

STREET FLOW DEPTH(FEET) = 0.49

HALFSTREET FLOOD WIDTH(FEET) = 17.94

AVERAGE FLOW VELOCITY(FEET/SEC.) = 2.01

PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.97

STREET FLOW TRAVEL TIME(MIN.) = 0.83 Tc(MIN.) = 10.05

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.249

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.10 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 0.10 SUBAREA RUNOFF(CFS) = 0.29

EFFECTIVE AREA(ACRES) = 2.26 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 2.5 PEAK FLOW RATE(CFS) = 6.56

NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE

END OF SUBAREA STREET FLOW HYDRAULICS:

DEPTH(FEET) = 0.48 HALFSTREET FLOOD WIDTH(FEET) = 17.84

FLOW VELOCITY(FEET/SEC.) = 1.99 DEPTH*VELOCITY(FT*FT/SEC.) = 0.96

LONGEST FLOWPATH FROM NODE 90.00 TO NODE 93.00 = 650.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 94.00 TO NODE 95.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 190.00

ELEVATION DATA: UPSTREAM(FEET) = 242.10 DOWNSTREAM(FEET) = 240.10

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.165

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 4.285

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.39 0.40 0.100 32 6.16

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 1.49

TOTAL AREA(ACRES) = 0.39 PEAK FLOW RATE(CFS) = 1.49

****************************************************************************

FLOW PROCESS FROM NODE 96.00 TO NODE 97.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

Page 29

PCEX25

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 200.00

ELEVATION DATA: UPSTREAM(FEET) = 241.30 DOWNSTREAM(FEET) = 240.20

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.165

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.935

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.52 0.40 0.100 32 7.16

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 1.82

TOTAL AREA(ACRES) = 0.52 PEAK FLOW RATE(CFS) = 1.82

****************************************************************************

FLOW PROCESS FROM NODE 98.00 TO NODE 99.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 160.00

ELEVATION DATA: UPSTREAM(FEET) = 241.40 DOWNSTREAM(FEET) = 240.70

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.860

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 4.033

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 1.06 0.40 0.100 32 6.86

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 3.81

TOTAL AREA(ACRES) = 1.06 PEAK FLOW RATE(CFS) = 3.81

****************************************************************************

FLOW PROCESS FROM NODE 102.00 TO NODE 103.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 150.00

ELEVATION DATA: UPSTREAM(FEET) = 242.40 DOWNSTREAM(FEET) = 241.30

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.029

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 4.339

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.27 0.40 0.100 32 6.03

Page 30

PCEX25

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 1.04

TOTAL AREA(ACRES) = 0.27 PEAK FLOW RATE(CFS) = 1.04

============================================================================

END OF STUDY SUMMARY:

TOTAL AREA(ACRES) = 0.3 TC(MIN.) = 6.03

EFFECTIVE AREA(ACRES) = 0.27 AREA-AVERAGED Fm(INCH/HR)= 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.100

PEAK FLOW RATE(CFS) = 1.04

============================================================================

============================================================================

END OF RATIONAL METHOD ANALYSIS

�

Page 31

HYDROLOGY REPORT August 2017

Pacific Center City of Anaheim, CA

APPENDIX 2.2

100-Year Hydrology Study, Existing Condition

PCEX100

____________________________________________________________________________

****************************************************************************

RATIONAL METHOD HYDROLOGY COMPUTER PROGRAM PACKAGE

(Reference: 1986 ORANGE COUNTY HYDROLOGY CRITERION)

(c) Copyright 1983-2014 Advanced Engineering Software (aes)

Ver. 21.0 Release Date: 06/01/2014 License ID 1355

Analysis prepared by:

Fuscoe Engineering

16795 Von Karman Ave

Suite 100

Irvine CA, 92606

************************** DESCRIPTION OF STUDY **************************

* PACIFIC CENTER - ANAHEIM *

* EXISTING HYDROLOGY *

* 100 YEAR EVENT *

**************************************************************************

FILE NAME: PCEX100.DAT

TIME/DATE OF STUDY: 13:42 08/01/2017

============================================================================

USER SPECIFIED HYDROLOGY AND HYDRAULIC MODEL INFORMATION:

============================================================================

--*TIME-OF-CONCENTRATION MODEL*--

USER SPECIFIED STORM EVENT(YEAR) = 100.00

SPECIFIED MINIMUM PIPE SIZE(INCH) = 12.00

SPECIFIED PERCENT OF GRADIENTS(DECIMAL) TO USE FOR FRICTION SLOPE = 0.90

*DATA BANK RAINFALL USED*

*ANTECEDENT MOISTURE CONDITION (AMC) III ASSUMED FOR RATIONAL METHOD*

*USER-DEFINED STREET-SECTIONS FOR COUPLED PIPEFLOW AND STREETFLOW MODEL*

HALF- CROWN TO STREET-CROSSFALL: CURB GUTTER-GEOMETRIES: MANNING

WIDTH CROSSFALL IN- / OUT-/PARK- HEIGHT WIDTH LIP HIKE FACTOR

NO. (FT) (FT) SIDE / SIDE/ WAY (FT) (FT) (FT) (FT) (n)

=== ===== ========= ================= ====== ===== ====== ===== =======

1 30.0 20.0 0.018/0.018/0.020 0.67 2.00 0.0312 0.167 0.0150

GLOBAL STREET FLOW-DEPTH CONSTRAINTS:

1. Relative Flow-Depth = 0.00 FEET

as (Maximum Allowable Street Flow Depth) - (Top-of-Curb)

2. (Depth)*(Velocity) Constraint = 6.0 (FT*FT/S)

*PIPE MAY BE SIZED TO HAVE A FLOW CAPACITY LESS THAN

UPSTREAM TRIBUTARY PIPE.*

*USER-SPECIFIED MINIMUM TOPOGRAPHIC SLOPE ADJUSTMENT NOT SELECTED

****************************************************************************

FLOW PROCESS FROM NODE 10.00 TO NODE 11.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

Page 1

PCEX100

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 355.00

ELEVATION DATA: UPSTREAM(FEET) = 243.40 DOWNSTREAM(FEET) = 239.40

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.809

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.792

SUBAREA Tc AND LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.87 0.40 0.100 52 7.81

PUBLIC PARK A 0.22 0.40 0.850 52 12.41

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.251

SUBAREA RUNOFF(CFS) = 4.60

TOTAL AREA(ACRES) = 1.09 PEAK FLOW RATE(CFS) = 4.60

****************************************************************************

FLOW PROCESS FROM NODE 11.00 TO NODE 12.00 IS CODE = 61

----------------------------------------------------------------------------

>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>(STANDARD CURB SECTION USED)<<<<<

============================================================================

UPSTREAM ELEVATION(FEET) = 239.40 DOWNSTREAM ELEVATION(FEET) = 238.50

STREET LENGTH(FEET) = 280.00 CURB HEIGHT(INCHES) = 6.0

STREET HALFWIDTH(FEET) = 40.00

DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 20.00

INSIDE STREET CROSSFALL(DECIMAL) = 0.020

OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020

SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1

STREET PARKWAY CROSSFALL(DECIMAL) = 0.020

Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150

Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200

**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 6.10

STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:

STREET FLOW DEPTH(FEET) = 0.49

HALFSTREET FLOOD WIDTH(FEET) = 18.08

AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.80

PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.88

STREET FLOW TRAVEL TIME(MIN.) = 2.59 Tc(MIN.) = 10.40

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.067

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.54 0.40 0.100 52

PUBLIC PARK A 0.31 0.40 0.850 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.374

SUBAREA AREA(ACRES) = 0.85 SUBAREA RUNOFF(CFS) = 3.00

EFFECTIVE AREA(ACRES) = 1.94 AREA-AVERAGED Fm(INCH/HR) = 0.12

Page 2

PCEX100

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.30

TOTAL AREA(ACRES) = 1.9 PEAK FLOW RATE(CFS) = 6.89

END OF SUBAREA STREET FLOW HYDRAULICS:

DEPTH(FEET) = 0.51 HALFSTREET FLOOD WIDTH(FEET) = 19.22

FLOW VELOCITY(FEET/SEC.) = 1.86 DEPTH*VELOCITY(FT*FT/SEC.) = 0.94

LONGEST FLOWPATH FROM NODE 10.00 TO NODE 12.00 = 635.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 12.00 TO NODE 13.00 IS CODE = 61

----------------------------------------------------------------------------

>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>(STANDARD CURB SECTION USED)<<<<<

============================================================================

UPSTREAM ELEVATION(FEET) = 238.50 DOWNSTREAM ELEVATION(FEET) = 238.00

STREET LENGTH(FEET) = 190.00 CURB HEIGHT(INCHES) = 6.0

STREET HALFWIDTH(FEET) = 30.00

DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 15.00

INSIDE STREET CROSSFALL(DECIMAL) = 0.020

OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020

SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1

STREET PARKWAY CROSSFALL(DECIMAL) = 0.020

Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150

Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200

**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 7.57

STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:

STREET FLOW DEPTH(FEET) = 0.53

HALFSTREET FLOOD WIDTH(FEET) = 22.15

AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.75

PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.94

STREET FLOW TRAVEL TIME(MIN.) = 1.81 Tc(MIN.) = 12.21

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.710

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.21 0.40 0.100 52

PUBLIC PARK A 0.22 0.40 0.850 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.484

SUBAREA AREA(ACRES) = 0.43 SUBAREA RUNOFF(CFS) = 1.36

EFFECTIVE AREA(ACRES) = 2.37 AREA-AVERAGED Fm(INCH/HR) = 0.13

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.34

TOTAL AREA(ACRES) = 2.4 PEAK FLOW RATE(CFS) = 7.63

END OF SUBAREA STREET FLOW HYDRAULICS:

DEPTH(FEET) = 0.54 HALFSTREET FLOOD WIDTH(FEET) = 22.27

FLOW VELOCITY(FEET/SEC.) = 1.76 DEPTH*VELOCITY(FT*FT/SEC.) = 0.94

LONGEST FLOWPATH FROM NODE 10.00 TO NODE 13.00 = 825.00 FEET.

****************************************************************************

Page 3

PCEX100

FLOW PROCESS FROM NODE 13.00 TO NODE 13.00 IS CODE = 10

----------------------------------------------------------------------------

>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<<

============================================================================

****************************************************************************

FLOW PROCESS FROM NODE 20.00 TO NODE 21.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 200.00

ELEVATION DATA: UPSTREAM(FEET) = 240.50 DOWNSTREAM(FEET) = 239.70

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.636

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.854

SUBAREA Tc AND LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.24 0.40 0.100 52 7.64

PUBLIC PARK A 0.14 0.40 0.850 52 12.13

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.376

SUBAREA RUNOFF(CFS) = 1.61

TOTAL AREA(ACRES) = 0.38 PEAK FLOW RATE(CFS) = 1.61

****************************************************************************

FLOW PROCESS FROM NODE 21.00 TO NODE 22.00 IS CODE = 91

----------------------------------------------------------------------------

>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<

============================================================================

UPSTREAM NODE ELEVATION(FEET) = 239.70

DOWNSTREAM NODE ELEVATION(FEET) = 239.20

CHANNEL LENGTH THRU SUBAREA(FEET) = 235.00

"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080

PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150

PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000

MAXIMUM DEPTH(FEET) = 1.00

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.963

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.24 0.40 0.100 52

PUBLIC PARK A 0.54 0.40 0.850 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.619

TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 2.90

TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 1.21

AVERAGE FLOW DEPTH(FEET) = 0.29 FLOOD WIDTH(FEET) = 21.17

"V" GUTTER FLOW TRAVEL TIME(MIN.) = 3.25 Tc(MIN.) = 10.88

SUBAREA AREA(ACRES) = 0.78 SUBAREA RUNOFF(CFS) = 2.61

EFFECTIVE AREA(ACRES) = 1.16 AREA-AVERAGED Fm(INCH/HR) = 0.22

Page 4

PCEX100

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.54

TOTAL AREA(ACRES) = 1.2 PEAK FLOW RATE(CFS) = 3.91

END OF SUBAREA "V" GUTTER HYDRAULICS:

DEPTH(FEET) = 0.32 FLOOD WIDTH(FEET) = 24.12

FLOW VELOCITY(FEET/SEC.) = 1.27 DEPTH*VELOCITY(FT*FT/SEC) = 0.41

LONGEST FLOWPATH FROM NODE 20.00 TO NODE 22.00 = 435.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 22.00 TO NODE 23.00 IS CODE = 61

----------------------------------------------------------------------------

>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>(STANDARD CURB SECTION USED)<<<<<

============================================================================

UPSTREAM ELEVATION(FEET) = 239.20 DOWNSTREAM ELEVATION(FEET) = 238.20

STREET LENGTH(FEET) = 205.00 CURB HEIGHT(INCHES) = 6.0

STREET HALFWIDTH(FEET) = 30.00

DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 15.00

INSIDE STREET CROSSFALL(DECIMAL) = 0.020

OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020

SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1

STREET PARKWAY CROSSFALL(DECIMAL) = 0.020

Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150

Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200

**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 4.71

STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:

STREET FLOW DEPTH(FEET) = 0.43

HALFSTREET FLOOD WIDTH(FEET) = 15.03

AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.98

PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.85

STREET FLOW TRAVEL TIME(MIN.) = 1.73 Tc(MIN.) = 12.61

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.642

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.49 0.40 0.100 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 0.49 SUBAREA RUNOFF(CFS) = 1.59

EFFECTIVE AREA(ACRES) = 1.65 AREA-AVERAGED Fm(INCH/HR) = 0.16

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.41

TOTAL AREA(ACRES) = 1.7 PEAK FLOW RATE(CFS) = 5.17

END OF SUBAREA STREET FLOW HYDRAULICS:

DEPTH(FEET) = 0.44 HALFSTREET FLOOD WIDTH(FEET) = 15.62

FLOW VELOCITY(FEET/SEC.) = 2.02 DEPTH*VELOCITY(FT*FT/SEC.) = 0.89

LONGEST FLOWPATH FROM NODE 20.00 TO NODE 23.00 = 640.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 23.00 TO NODE 23.00 IS CODE = 10

Page 5

PCEX100

----------------------------------------------------------------------------

>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 2 <<<<<

============================================================================

****************************************************************************

FLOW PROCESS FROM NODE 30.00 TO NODE 31.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 290.00

ELEVATION DATA: UPSTREAM(FEET) = 240.90 DOWNSTREAM(FEET) = 239.60

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.660

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.517

SUBAREA Tc AND LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 1.10 0.40 0.100 52 8.66

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 4.43

TOTAL AREA(ACRES) = 1.10 PEAK FLOW RATE(CFS) = 4.43

****************************************************************************

FLOW PROCESS FROM NODE 31.00 TO NODE 23.00 IS CODE = 61

----------------------------------------------------------------------------

>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>(STANDARD CURB SECTION USED)<<<<<

============================================================================

UPSTREAM ELEVATION(FEET) = 239.60 DOWNSTREAM ELEVATION(FEET) = 238.20

STREET LENGTH(FEET) = 465.00 CURB HEIGHT(INCHES) = 6.0

STREET HALFWIDTH(FEET) = 30.00

DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 15.00

INSIDE STREET CROSSFALL(DECIMAL) = 0.020

OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020

SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1

STREET PARKWAY CROSSFALL(DECIMAL) = 0.020

Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150

Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200

**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 6.15

STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:

STREET FLOW DEPTH(FEET) = 0.49

HALFSTREET FLOOD WIDTH(FEET) = 18.37

AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.76

PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.87

STREET FLOW TRAVEL TIME(MIN.) = 4.40 Tc(MIN.) = 13.06

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.569

SUBAREA LOSS RATE DATA(AMC III):

Page 6

PCEX100

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 1.08 0.40 0.100 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 1.08 SUBAREA RUNOFF(CFS) = 3.43

EFFECTIVE AREA(ACRES) = 2.18 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 2.2 PEAK FLOW RATE(CFS) = 6.92

END OF SUBAREA STREET FLOW HYDRAULICS:

DEPTH(FEET) = 0.51 HALFSTREET FLOOD WIDTH(FEET) = 19.81

FLOW VELOCITY(FEET/SEC.) = 1.81 DEPTH*VELOCITY(FT*FT/SEC.) = 0.93

LONGEST FLOWPATH FROM NODE 30.00 TO NODE 23.00 = 755.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 23.00 TO NODE 23.00 IS CODE = 11

----------------------------------------------------------------------------

>>>>>CONFLUENCE MEMORY BANK # 2 WITH THE MAIN-STREAM MEMORY<<<<<

============================================================================

** MAIN STREAM CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 6.92 13.06 3.569 0.40( 0.04) 0.10 2.2 30.00

LONGEST FLOWPATH FROM NODE 30.00 TO NODE 23.00 = 755.00 FEET.

** MEMORY BANK # 2 CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 5.17 12.61 3.642 0.40( 0.16) 0.41 1.7 20.00

LONGEST FLOWPATH FROM NODE 20.00 TO NODE 23.00 = 640.00 FEET.

** PEAK FLOW RATE TABLE **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 11.99 12.61 3.642 0.40( 0.09) 0.24 3.8 20.00

2 11.98 13.06 3.569 0.40( 0.09) 0.23 3.8 30.00

TOTAL AREA(ACRES) = 3.8

COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:

PEAK FLOW RATE(CFS) = 11.99 Tc(MIN.) = 12.607

EFFECTIVE AREA(ACRES) = 3.75 AREA-AVERAGED Fm(INCH/HR) = 0.09

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.23

TOTAL AREA(ACRES) = 3.8

LONGEST FLOWPATH FROM NODE 30.00 TO NODE 23.00 = 755.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 23.00 TO NODE 23.00 IS CODE = 12

----------------------------------------------------------------------------

>>>>>CLEAR MEMORY BANK # 2 <<<<<

============================================================================

Page 7

PCEX100

****************************************************************************

FLOW PROCESS FROM NODE 23.00 TO NODE 13.00 IS CODE = 91

----------------------------------------------------------------------------

>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<

============================================================================

UPSTREAM NODE ELEVATION(FEET) = 238.20

DOWNSTREAM NODE ELEVATION(FEET) = 238.00

CHANNEL LENGTH THRU SUBAREA(FEET) = 75.00

"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080

PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150

PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000

MAXIMUM DEPTH(FEET) = 0.75

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.530

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.08 0.40 0.100 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 12.11

TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 1.77

AVERAGE FLOW DEPTH(FEET) = 0.45 FLOOD WIDTH(FEET) = 36.56

"V" GUTTER FLOW TRAVEL TIME(MIN.) = 0.71 Tc(MIN.) = 13.31

SUBAREA AREA(ACRES) = 0.08 SUBAREA RUNOFF(CFS) = 0.25

EFFECTIVE AREA(ACRES) = 3.83 AREA-AVERAGED Fm(INCH/HR) = 0.09

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.23

TOTAL AREA(ACRES) = 3.9 PEAK FLOW RATE(CFS) = 11.99

NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE

END OF SUBAREA "V" GUTTER HYDRAULICS:

DEPTH(FEET) = 0.44 FLOOD WIDTH(FEET) = 36.44

FLOW VELOCITY(FEET/SEC.) = 1.76 DEPTH*VELOCITY(FT*FT/SEC) = 0.78

LONGEST FLOWPATH FROM NODE 30.00 TO NODE 13.00 = 830.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 13.00 TO NODE 13.00 IS CODE = 11

----------------------------------------------------------------------------

>>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<<

============================================================================

** MAIN STREAM CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 11.99 13.31 3.530 0.40( 0.09) 0.23 3.8 20.00

2 11.98 13.77 3.463 0.40( 0.09) 0.23 3.9 30.00

LONGEST FLOWPATH FROM NODE 30.00 TO NODE 13.00 = 830.00 FEET.

** MEMORY BANK # 1 CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 7.63 12.21 3.710 0.40( 0.13) 0.34 2.4 10.00

LONGEST FLOWPATH FROM NODE 10.00 TO NODE 13.00 = 825.00 FEET.

Page 8

PCEX100

** PEAK FLOW RATE TABLE **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 19.19 12.21 3.710 0.40( 0.11) 0.28 5.9 10.00

2 19.23 13.31 3.530 0.40( 0.11) 0.27 6.2 20.00

3 19.08 13.77 3.463 0.40( 0.11) 0.27 6.3 30.00

TOTAL AREA(ACRES) = 6.3

COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:

PEAK FLOW RATE(CFS) = 19.23 Tc(MIN.) = 13.314

EFFECTIVE AREA(ACRES) = 6.20 AREA-AVERAGED Fm(INCH/HR) = 0.11

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.28

TOTAL AREA(ACRES) = 6.3

LONGEST FLOWPATH FROM NODE 30.00 TO NODE 13.00 = 830.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 13.00 TO NODE 13.00 IS CODE = 12

----------------------------------------------------------------------------

>>>>>CLEAR MEMORY BANK # 1 <<<<<

============================================================================

****************************************************************************

FLOW PROCESS FROM NODE 13.00 TO NODE 14.00 IS CODE = 61

----------------------------------------------------------------------------

>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>(STANDARD CURB SECTION USED)<<<<<

============================================================================

UPSTREAM ELEVATION(FEET) = 238.00 DOWNSTREAM ELEVATION(FEET) = 237.00

STREET LENGTH(FEET) = 320.00 CURB HEIGHT(INCHES) = 6.0

STREET HALFWIDTH(FEET) = 30.00

DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 15.00

INSIDE STREET CROSSFALL(DECIMAL) = 0.020

OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020

SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1

STREET PARKWAY CROSSFALL(DECIMAL) = 0.020

Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150

Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200

**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 20.71

STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:

STREET FLOW DEPTH(FEET) = 0.70

HALFSTREET FLOOD WIDTH(FEET) = 38.44

AVERAGE FLOW VELOCITY(FEET/SEC.) = 2.24

PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 1.56

STREET FLOW TRAVEL TIME(MIN.) = 2.38 Tc(MIN.) = 15.70

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.212

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 1.04 0.40 0.100 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

Page 9

PCEX100

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 1.04 SUBAREA RUNOFF(CFS) = 2.97

EFFECTIVE AREA(ACRES) = 7.24 AREA-AVERAGED Fm(INCH/HR) = 0.10

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.25

TOTAL AREA(ACRES) = 7.3 PEAK FLOW RATE(CFS) = 20.30

END OF SUBAREA STREET FLOW HYDRAULICS:

DEPTH(FEET) = 0.69 HALFSTREET FLOOD WIDTH(FEET) = 38.09

FLOW VELOCITY(FEET/SEC.) = 2.23 DEPTH*VELOCITY(FT*FT/SEC.) = 1.54

LONGEST FLOWPATH FROM NODE 30.00 TO NODE 14.00 = 1150.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 14.00 TO NODE 14.00 IS CODE = 10

----------------------------------------------------------------------------

>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<<

============================================================================

****************************************************************************

FLOW PROCESS FROM NODE 40.00 TO NODE 41.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 290.00

ELEVATION DATA: UPSTREAM(FEET) = 241.70 DOWNSTREAM(FEET) = 240.70

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 9.127

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.383

SUBAREA Tc AND LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.68 0.40 0.100 52 9.13

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 2.66

TOTAL AREA(ACRES) = 0.68 PEAK FLOW RATE(CFS) = 2.66

****************************************************************************

FLOW PROCESS FROM NODE 41.00 TO NODE 42.00 IS CODE = 61

----------------------------------------------------------------------------

>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>(STANDARD CURB SECTION USED)<<<<<

============================================================================

UPSTREAM ELEVATION(FEET) = 240.70 DOWNSTREAM ELEVATION(FEET) = 239.50

STREET LENGTH(FEET) = 260.00 CURB HEIGHT(INCHES) = 6.0

STREET HALFWIDTH(FEET) = 30.00

DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 15.00

INSIDE STREET CROSSFALL(DECIMAL) = 0.020

OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020

SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1

Page 10

PCEX100

STREET PARKWAY CROSSFALL(DECIMAL) = 0.020

Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150

Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200

**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 3.08

STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:

STREET FLOW DEPTH(FEET) = 0.38

HALFSTREET FLOOD WIDTH(FEET) = 12.81

AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.75

PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.67

STREET FLOW TRAVEL TIME(MIN.) = 2.47 Tc(MIN.) = 11.60

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.820

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.25 0.40 0.100 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 0.25 SUBAREA RUNOFF(CFS) = 0.85

EFFECTIVE AREA(ACRES) = 0.93 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 0.9 PEAK FLOW RATE(CFS) = 3.16

END OF SUBAREA STREET FLOW HYDRAULICS:

DEPTH(FEET) = 0.39 HALFSTREET FLOOD WIDTH(FEET) = 12.97

FLOW VELOCITY(FEET/SEC.) = 1.76 DEPTH*VELOCITY(FT*FT/SEC.) = 0.68

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 42.00 = 550.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 42.00 TO NODE 42.00 IS CODE = 10

----------------------------------------------------------------------------

>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 3 <<<<<

============================================================================

****************************************************************************

FLOW PROCESS FROM NODE 43.00 TO NODE 44.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 330.00

ELEVATION DATA: UPSTREAM(FEET) = 241.50 DOWNSTREAM(FEET) = 240.20

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 9.358

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.320

SUBAREA Tc AND LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 1.73 0.40 0.100 52 9.36

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 6.66

Page 11

PCEX100

TOTAL AREA(ACRES) = 1.73 PEAK FLOW RATE(CFS) = 6.66

****************************************************************************

FLOW PROCESS FROM NODE 44.00 TO NODE 42.00 IS CODE = 91

----------------------------------------------------------------------------

>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<

============================================================================

UPSTREAM NODE ELEVATION(FEET) = 240.20

DOWNSTREAM NODE ELEVATION(FEET) = 239.50

CHANNEL LENGTH THRU SUBAREA(FEET) = 155.00

"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080

PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150

PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000

MAXIMUM DEPTH(FEET) = 0.75

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.016

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 1.17 0.40 0.100 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 8.76

TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 2.03

AVERAGE FLOW DEPTH(FEET) = 0.37 FLOOD WIDTH(FEET) = 28.81

"V" GUTTER FLOW TRAVEL TIME(MIN.) = 1.27 Tc(MIN.) = 10.63

SUBAREA AREA(ACRES) = 1.17 SUBAREA RUNOFF(CFS) = 4.19

EFFECTIVE AREA(ACRES) = 2.90 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 2.9 PEAK FLOW RATE(CFS) = 10.38

END OF SUBAREA "V" GUTTER HYDRAULICS:

DEPTH(FEET) = 0.39 FLOOD WIDTH(FEET) = 30.94

FLOW VELOCITY(FEET/SEC.) = 2.10 DEPTH*VELOCITY(FT*FT/SEC) = 0.82

LONGEST FLOWPATH FROM NODE 43.00 TO NODE 42.00 = 485.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 42.00 TO NODE 42.00 IS CODE = 11

----------------------------------------------------------------------------

>>>>>CONFLUENCE MEMORY BANK # 3 WITH THE MAIN-STREAM MEMORY<<<<<

============================================================================

** MAIN STREAM CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 10.38 10.63 4.016 0.40( 0.04) 0.10 2.9 43.00

LONGEST FLOWPATH FROM NODE 43.00 TO NODE 42.00 = 485.00 FEET.

** MEMORY BANK # 3 CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 3.16 11.60 3.820 0.40( 0.04) 0.10 0.9 40.00

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 42.00 = 550.00 FEET.

Page 12

PCEX100

** PEAK FLOW RATE TABLE **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 13.43 10.63 4.016 0.40( 0.04) 0.10 3.8 43.00

2 13.03 11.60 3.820 0.40( 0.04) 0.10 3.8 40.00

TOTAL AREA(ACRES) = 3.8

COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:

PEAK FLOW RATE(CFS) = 13.43 Tc(MIN.) = 10.631

EFFECTIVE AREA(ACRES) = 3.75 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 3.8

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 42.00 = 550.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 42.00 TO NODE 42.00 IS CODE = 12

----------------------------------------------------------------------------

>>>>>CLEAR MEMORY BANK # 3 <<<<<

============================================================================

****************************************************************************

FLOW PROCESS FROM NODE 42.00 TO NODE 45.00 IS CODE = 91

----------------------------------------------------------------------------

>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<

============================================================================

UPSTREAM NODE ELEVATION(FEET) = 239.50

DOWNSTREAM NODE ELEVATION(FEET) = 239.20

CHANNEL LENGTH THRU SUBAREA(FEET) = 50.00

"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080

PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150

PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000

MAXIMUM DEPTH(FEET) = 0.50

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.946

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.28 0.40 0.100 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 13.92

TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 2.51

AVERAGE FLOW DEPTH(FEET) = 0.41 FLOOD WIDTH(FEET) = 32.78

"V" GUTTER FLOW TRAVEL TIME(MIN.) = 0.33 Tc(MIN.) = 10.96

SUBAREA AREA(ACRES) = 0.28 SUBAREA RUNOFF(CFS) = 0.98

EFFECTIVE AREA(ACRES) = 4.03 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 4.1 PEAK FLOW RATE(CFS) = 14.17

END OF SUBAREA "V" GUTTER HYDRAULICS:

DEPTH(FEET) = 0.41 FLOOD WIDTH(FEET) = 33.09

FLOW VELOCITY(FEET/SEC.) = 2.51 DEPTH*VELOCITY(FT*FT/SEC) = 1.03

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 45.00 = 600.00 FEET.

Page 13

PCEX100

****************************************************************************

FLOW PROCESS FROM NODE 45.00 TO NODE 46.00 IS CODE = 91

----------------------------------------------------------------------------

>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<

============================================================================

UPSTREAM NODE ELEVATION(FEET) = 239.20

DOWNSTREAM NODE ELEVATION(FEET) = 238.00

CHANNEL LENGTH THRU SUBAREA(FEET) = 330.00

"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080

PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150

PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000

MAXIMUM DEPTH(FEET) = 0.50

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.491

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.70 0.40 0.100 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 15.26

TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 2.10

AVERAGE FLOW DEPTH(FEET) = 0.46 FLOOD WIDTH(FEET) = 37.66

"V" GUTTER FLOW TRAVEL TIME(MIN.) = 2.61 Tc(MIN.) = 13.58

SUBAREA AREA(ACRES) = 0.70 SUBAREA RUNOFF(CFS) = 2.17

EFFECTIVE AREA(ACRES) = 4.73 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 4.8 PEAK FLOW RATE(CFS) = 14.70

END OF SUBAREA "V" GUTTER HYDRAULICS:

DEPTH(FEET) = 0.45 FLOOD WIDTH(FEET) = 37.05

FLOW VELOCITY(FEET/SEC.) = 2.09 DEPTH*VELOCITY(FT*FT/SEC) = 0.94

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 46.00 = 930.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 46.00 TO NODE 47.00 IS CODE = 91

----------------------------------------------------------------------------

>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<

============================================================================

UPSTREAM NODE ELEVATION(FEET) = 238.00

DOWNSTREAM NODE ELEVATION(FEET) = 237.60

CHANNEL LENGTH THRU SUBAREA(FEET) = 170.00

"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080

PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150

PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000

MAXIMUM DEPTH(FEET) = 0.50

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.280

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 1.10 0.40 0.100 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 16.30

Page 14

PCEX100

TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 1.81

AVERAGE FLOW DEPTH(FEET) = 0.50 FLOOD WIDTH(FEET) = 42.00

"V" GUTTER FLOW TRAVEL TIME(MIN.) = 1.56 Tc(MIN.) = 15.14

SUBAREA AREA(ACRES) = 1.10 SUBAREA RUNOFF(CFS) = 3.21

EFFECTIVE AREA(ACRES) = 5.83 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 5.9 PEAK FLOW RATE(CFS) = 17.00

==>>ERROR:FLOW EXCEEDS CAPACITY OF CHANNEL WITH

NORMAL DEPTH EQUAL TO SPECIFIED MAXIMUM ALLOWABLE DEPTH.

AS AN APPROXIMATION, TRAVEL TIME CALCULATIONS ARE BASED

ON FLOW DEPTH EQUAL TO THE SPECIFIED MAXIMUM ALLOWABLE DEPTH.

END OF SUBAREA "V" GUTTER HYDRAULICS:

DEPTH(FEET) = 0.50 FLOOD WIDTH(FEET) = 42.00

FLOW VELOCITY(FEET/SEC.) = 1.89 DEPTH*VELOCITY(FT*FT/SEC) = 0.95

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 47.00 = 1100.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 47.00 TO NODE 47.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 15.14

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.280

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.33 0.40 0.100 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 0.33 SUBAREA RUNOFF(CFS) = 0.96

EFFECTIVE AREA(ACRES) = 6.16 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 6.2 PEAK FLOW RATE(CFS) = 17.97

****************************************************************************

FLOW PROCESS FROM NODE 47.00 TO NODE 14.00 IS CODE = 91

----------------------------------------------------------------------------

>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<

============================================================================

UPSTREAM NODE ELEVATION(FEET) = 237.60

DOWNSTREAM NODE ELEVATION(FEET) = 237.00

CHANNEL LENGTH THRU SUBAREA(FEET) = 220.00

"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080

PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150

PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000

MAXIMUM DEPTH(FEET) = 1.00

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.069

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

Page 15

PCEX100

COMMERCIAL A 0.50 0.40 0.100 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 18.65

TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 1.98

AVERAGE FLOW DEPTH(FEET) = 0.51 FLOOD WIDTH(FEET) = 43.07

"V" GUTTER FLOW TRAVEL TIME(MIN.) = 1.86 Tc(MIN.) = 17.00

SUBAREA AREA(ACRES) = 0.50 SUBAREA RUNOFF(CFS) = 1.36

EFFECTIVE AREA(ACRES) = 6.66 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 6.7 PEAK FLOW RATE(CFS) = 18.16

END OF SUBAREA "V" GUTTER HYDRAULICS:

DEPTH(FEET) = 0.51 FLOOD WIDTH(FEET) = 42.72

FLOW VELOCITY(FEET/SEC.) = 1.96 DEPTH*VELOCITY(FT*FT/SEC) = 0.99

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 14.00 = 1320.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 14.00 TO NODE 14.00 IS CODE = 11

----------------------------------------------------------------------------

>>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<<

============================================================================

** MAIN STREAM CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 18.16 16.99 3.069 0.40( 0.04) 0.10 6.7 43.00

2 17.76 18.02 2.968 0.40( 0.04) 0.10 6.7 40.00

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 14.00 = 1320.00 FEET.

** MEMORY BANK # 1 CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 20.26 14.59 3.350 0.40( 0.10) 0.25 6.9 10.00

2 20.30 15.70 3.212 0.40( 0.10) 0.25 7.2 20.00

3 20.16 16.16 3.159 0.40( 0.10) 0.25 7.3 30.00

LONGEST FLOWPATH FROM NODE 30.00 TO NODE 14.00 = 1150.00 FEET.

** PEAK FLOW RATE TABLE **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 37.30 14.59 3.350 0.40( 0.07) 0.18 12.6 10.00

2 37.87 15.70 3.212 0.40( 0.07) 0.18 13.4 20.00

3 37.95 16.16 3.159 0.40( 0.07) 0.18 13.7 30.00

4 37.73 16.99 3.069 0.40( 0.07) 0.18 14.0 43.00

5 36.67 18.02 2.968 0.40( 0.07) 0.18 14.1 40.00

TOTAL AREA(ACRES) = 14.1

COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:

PEAK FLOW RATE(CFS) = 37.95 Tc(MIN.) = 16.157

EFFECTIVE AREA(ACRES) = 13.65 AREA-AVERAGED Fm(INCH/HR) = 0.07

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.18

TOTAL AREA(ACRES) = 14.1

Page 16

PCEX100

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 14.00 = 1320.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 14.00 TO NODE 14.00 IS CODE = 12

----------------------------------------------------------------------------

>>>>>CLEAR MEMORY BANK # 1 <<<<<

============================================================================

****************************************************************************

FLOW PROCESS FROM NODE 14.00 TO NODE 15.00 IS CODE = 52

----------------------------------------------------------------------------

>>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<

>>>>>TRAVELTIME THRU SUBAREA<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 237.00 DOWNSTREAM(FEET) = 235.10

CHANNEL LENGTH THRU SUBAREA(FEET) = 145.00 CHANNEL SLOPE = 0.0131

CHANNEL FLOW THRU SUBAREA(CFS) = 37.95

FLOW VELOCITY(FEET/SEC) = 4.09 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL)

TRAVEL TIME(MIN.) = 0.59 Tc(MIN.) = 16.75

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 15.00 = 1465.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 15.00 TO NODE 15.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 16.75

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.095

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

PUBLIC PARK A 0.16 0.40 0.850 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850

SUBAREA AREA(ACRES) = 0.16 SUBAREA RUNOFF(CFS) = 0.40

EFFECTIVE AREA(ACRES) = 13.81 AREA-AVERAGED Fm(INCH/HR) = 0.07

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.19

TOTAL AREA(ACRES) = 14.2 PEAK FLOW RATE(CFS) = 37.95

NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE

****************************************************************************

FLOW PROCESS FROM NODE 15.00 TO NODE 15.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 16.75

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.095

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 1.25 0.40 0.100 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

Page 17

PCEX100

SUBAREA AREA(ACRES) = 1.25 SUBAREA RUNOFF(CFS) = 3.44

EFFECTIVE AREA(ACRES) = 15.06 AREA-AVERAGED Fm(INCH/HR) = 0.07

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.18

TOTAL AREA(ACRES) = 15.5 PEAK FLOW RATE(CFS) = 40.99

****************************************************************************

FLOW PROCESS FROM NODE 15.00 TO NODE 16.00 IS CODE = 52

----------------------------------------------------------------------------

>>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<

>>>>>TRAVELTIME THRU SUBAREA<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 235.10 DOWNSTREAM(FEET) = 234.10

CHANNEL LENGTH THRU SUBAREA(FEET) = 205.00 CHANNEL SLOPE = 0.0049

CHANNEL FLOW THRU SUBAREA(CFS) = 40.99

FLOW VELOCITY(FEET/SEC) = 2.55 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL)

TRAVEL TIME(MIN.) = 1.34 Tc(MIN.) = 18.09

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 16.00 = 1670.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 16.00 TO NODE 16.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 18.09

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 2.962

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

PUBLIC PARK A 0.30 0.40 0.850 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850

SUBAREA AREA(ACRES) = 0.30 SUBAREA RUNOFF(CFS) = 0.71

EFFECTIVE AREA(ACRES) = 15.36 AREA-AVERAGED Fm(INCH/HR) = 0.08

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.19

TOTAL AREA(ACRES) = 15.8 PEAK FLOW RATE(CFS) = 40.99

NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE

****************************************************************************

FLOW PROCESS FROM NODE 16.00 TO NODE 16.00 IS CODE = 10

----------------------------------------------------------------------------

>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 3 <<<<<

============================================================================

****************************************************************************

FLOW PROCESS FROM NODE 50.00 TO NODE 51.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 245.00

ELEVATION DATA: UPSTREAM(FEET) = 241.50 DOWNSTREAM(FEET) = 240.50

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

Page 18

PCEX100

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.248

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.644

SUBAREA Tc AND LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.84 0.40 0.100 52 8.25

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 3.48

TOTAL AREA(ACRES) = 0.84 PEAK FLOW RATE(CFS) = 3.48

****************************************************************************

FLOW PROCESS FROM NODE 51.00 TO NODE 52.00 IS CODE = 41

----------------------------------------------------------------------------

>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 238.00 DOWNSTREAM(FEET) = 237.50

FLOW LENGTH(FEET) = 125.00 MANNING'S N = 0.011

ASSUME FULL-FLOWING PIPELINE

PIPE-FLOW VELOCITY(FEET/SEC.) = 4.43

PIPE FLOW VELOCITY = (TOTAL FLOW)/(PIPE CROSS SECTION AREA)

GIVEN PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1

PIPE-FLOW(CFS) = 3.48

PIPE TRAVEL TIME(MIN.) = 0.47 Tc(MIN.) = 8.72

LONGEST FLOWPATH FROM NODE 50.00 TO NODE 52.00 = 370.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 52.00 TO NODE 52.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 8.72

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.499

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 1.28 0.40 0.100 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 1.28 SUBAREA RUNOFF(CFS) = 5.14

EFFECTIVE AREA(ACRES) = 2.12 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 2.1 PEAK FLOW RATE(CFS) = 8.51

****************************************************************************

FLOW PROCESS FROM NODE 52.00 TO NODE 53.00 IS CODE = 41

----------------------------------------------------------------------------

>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 237.50 DOWNSTREAM(FEET) = 236.50

FLOW LENGTH(FEET) = 330.00 MANNING'S N = 0.011

Page 19

PCEX100

ASSUME FULL-FLOWING PIPELINE

PIPE-FLOW VELOCITY(FEET/SEC.) = 10.83

PIPE FLOW VELOCITY = (TOTAL FLOW)/(PIPE CROSS SECTION AREA)

GIVEN PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1

PIPE-FLOW(CFS) = 8.51

PIPE TRAVEL TIME(MIN.) = 0.51 Tc(MIN.) = 9.23

LONGEST FLOWPATH FROM NODE 50.00 TO NODE 53.00 = 700.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 53.00 TO NODE 53.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 9.23

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.356

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 1.63 0.40 0.100 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 1.63 SUBAREA RUNOFF(CFS) = 6.33

EFFECTIVE AREA(ACRES) = 3.75 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 3.8 PEAK FLOW RATE(CFS) = 14.57

****************************************************************************

FLOW PROCESS FROM NODE 53.00 TO NODE 54.00 IS CODE = 41

----------------------------------------------------------------------------

>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 236.50 DOWNSTREAM(FEET) = 236.30

FLOW LENGTH(FEET) = 30.00 MANNING'S N = 0.011

ASSUME FULL-FLOWING PIPELINE

PIPE-FLOW VELOCITY(FEET/SEC.) = 18.54

PIPE FLOW VELOCITY = (TOTAL FLOW)/(PIPE CROSS SECTION AREA)

GIVEN PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1

PIPE-FLOW(CFS) = 14.57

PIPE TRAVEL TIME(MIN.) = 0.03 Tc(MIN.) = 9.25

LONGEST FLOWPATH FROM NODE 50.00 TO NODE 54.00 = 730.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 54.00 TO NODE 54.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 9.25

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.348

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.49 0.40 0.100 52

Page 20

PCEX100

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 0.49 SUBAREA RUNOFF(CFS) = 1.90

EFFECTIVE AREA(ACRES) = 4.24 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 4.2 PEAK FLOW RATE(CFS) = 16.44

****************************************************************************

FLOW PROCESS FROM NODE 54.00 TO NODE 55.00 IS CODE = 52

----------------------------------------------------------------------------

>>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<

>>>>>TRAVELTIME THRU SUBAREA<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 236.30 DOWNSTREAM(FEET) = 235.50

CHANNEL LENGTH THRU SUBAREA(FEET) = 160.00 CHANNEL SLOPE = 0.0050

CHANNEL FLOW THRU SUBAREA(CFS) = 16.44

FLOW VELOCITY(FEET/SEC) = 2.01 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL)

TRAVEL TIME(MIN.) = 1.33 Tc(MIN.) = 10.58

LONGEST FLOWPATH FROM NODE 50.00 TO NODE 55.00 = 890.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 55.00 TO NODE 55.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 10.58

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.027

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.31 0.40 0.100 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 0.31 SUBAREA RUNOFF(CFS) = 1.11

EFFECTIVE AREA(ACRES) = 4.55 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 4.5 PEAK FLOW RATE(CFS) = 16.44

NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE

****************************************************************************

FLOW PROCESS FROM NODE 55.00 TO NODE 55.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 10.58

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.027

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

PUBLIC PARK A 0.19 0.40 0.850 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850

SUBAREA AREA(ACRES) = 0.19 SUBAREA RUNOFF(CFS) = 0.63

Page 21

PCEX100

EFFECTIVE AREA(ACRES) = 4.74 AREA-AVERAGED Fm(INCH/HR) = 0.05

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.13

TOTAL AREA(ACRES) = 4.7 PEAK FLOW RATE(CFS) = 16.96

****************************************************************************

FLOW PROCESS FROM NODE 55.00 TO NODE 16.00 IS CODE = 52

----------------------------------------------------------------------------

>>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<

>>>>>TRAVELTIME THRU SUBAREA<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 235.50 DOWNSTREAM(FEET) = 234.10

CHANNEL LENGTH THRU SUBAREA(FEET) = 255.00 CHANNEL SLOPE = 0.0055

CHANNEL FLOW THRU SUBAREA(CFS) = 16.96

FLOW VELOCITY(FEET/SEC) = 2.12 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL)

TRAVEL TIME(MIN.) = 2.00 Tc(MIN.) = 12.58

LONGEST FLOWPATH FROM NODE 50.00 TO NODE 16.00 = 1145.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 16.00 TO NODE 16.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 12.58

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.647

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

PUBLIC PARK A 0.29 0.40 0.850 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850

SUBAREA AREA(ACRES) = 0.29 SUBAREA RUNOFF(CFS) = 0.86

EFFECTIVE AREA(ACRES) = 5.03 AREA-AVERAGED Fm(INCH/HR) = 0.07

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.17

TOTAL AREA(ACRES) = 5.0 PEAK FLOW RATE(CFS) = 16.96

NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE

****************************************************************************

FLOW PROCESS FROM NODE 16.00 TO NODE 16.00 IS CODE = 11

----------------------------------------------------------------------------

>>>>>CONFLUENCE MEMORY BANK # 3 WITH THE MAIN-STREAM MEMORY<<<<<

============================================================================

** MAIN STREAM CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 16.96 12.58 3.647 0.40( 0.07) 0.17 5.0 50.00

LONGEST FLOWPATH FROM NODE 50.00 TO NODE 16.00 = 1145.00 FEET.

** MEMORY BANK # 3 CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 40.50 16.52 3.119 0.40( 0.08) 0.20 14.4 10.00

2 40.95 17.62 3.006 0.40( 0.08) 0.19 15.1 20.00

Page 22

PCEX100

3 40.99 18.09 2.962 0.40( 0.08) 0.19 15.4 30.00

4 40.71 18.93 2.886 0.40( 0.08) 0.19 15.7 43.00

5 39.58 19.96 2.799 0.40( 0.08) 0.19 15.8 40.00

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 16.00 = 1670.00 FEET.

** PEAK FLOW RATE TABLE **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 53.14 12.58 3.647 0.40( 0.08) 0.19 16.0 50.00

2 54.96 16.52 3.119 0.40( 0.08) 0.19 19.4 10.00

3 54.87 17.62 3.006 0.40( 0.08) 0.19 20.1 20.00

4 54.70 18.09 2.962 0.40( 0.07) 0.19 20.4 30.00

5 54.06 18.93 2.886 0.40( 0.07) 0.19 20.7 43.00

6 52.52 19.96 2.799 0.40( 0.07) 0.19 20.8 40.00

TOTAL AREA(ACRES) = 20.8

COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:

PEAK FLOW RATE(CFS) = 54.96 Tc(MIN.) = 16.521

EFFECTIVE AREA(ACRES) = 19.38 AREA-AVERAGED Fm(INCH/HR) = 0.08

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.19

TOTAL AREA(ACRES) = 20.8

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 16.00 = 1670.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 16.00 TO NODE 17.00 IS CODE = 41

----------------------------------------------------------------------------

>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 234.10 DOWNSTREAM(FEET) = 233.20

FLOW LENGTH(FEET) = 55.00 MANNING'S N = 0.013

ASSUME FULL-FLOWING PIPELINE

PIPE-FLOW VELOCITY(FEET/SEC.) = 8.75

PIPE FLOW VELOCITY = (TOTAL FLOW)/(PIPE CROSS SECTION AREA)

GIVEN PIPE DIAMETER(INCH) = 24.00 NUMBER OF PIPES = 2

PIPE-FLOW(CFS) = 54.96

PIPE TRAVEL TIME(MIN.) = 0.10 Tc(MIN.) = 16.63

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 17.00 = 1725.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 17.00 TO NODE 17.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 16.63

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.108

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

PUBLIC PARK A 0.53 0.40 0.850 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850

SUBAREA AREA(ACRES) = 0.53 SUBAREA RUNOFF(CFS) = 1.32

Page 23

PCEX100

EFFECTIVE AREA(ACRES) = 19.91 AREA-AVERAGED Fm(INCH/HR) = 0.08

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.21

TOTAL AREA(ACRES) = 21.3 PEAK FLOW RATE(CFS) = 54.96

NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE

****************************************************************************

FLOW PROCESS FROM NODE 80.00 TO NODE 81.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 320.00

ELEVATION DATA: UPSTREAM(FEET) = 243.30 DOWNSTREAM(FEET) = 240.10

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.672

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.841

SUBAREA Tc AND LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

PUBLIC PARK A 0.54 0.40 0.850 52 12.19

COMMERCIAL A 0.12 0.40 0.100 52 7.67

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.714

SUBAREA RUNOFF(CFS) = 2.71

TOTAL AREA(ACRES) = 0.66 PEAK FLOW RATE(CFS) = 2.71

****************************************************************************

FLOW PROCESS FROM NODE 81.00 TO NODE 82.00 IS CODE = 61

----------------------------------------------------------------------------

>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>(STANDARD CURB SECTION USED)<<<<<

============================================================================

UPSTREAM ELEVATION(FEET) = 240.10 DOWNSTREAM ELEVATION(FEET) = 238.80

STREET LENGTH(FEET) = 150.00 CURB HEIGHT(INCHES) = 6.0

STREET HALFWIDTH(FEET) = 40.00

DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 28.00

INSIDE STREET CROSSFALL(DECIMAL) = 0.020

OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020

SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1

STREET PARKWAY CROSSFALL(DECIMAL) = 0.020

Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150

Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200

**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 3.13

STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:

STREET FLOW DEPTH(FEET) = 0.35

HALFSTREET FLOOD WIDTH(FEET) = 11.30

AVERAGE FLOW VELOCITY(FEET/SEC.) = 2.24

PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.79

STREET FLOW TRAVEL TIME(MIN.) = 1.11 Tc(MIN.) = 8.79

Page 24

PCEX100

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.479

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

PUBLIC PARK A 0.11 0.40 0.850 52

COMMERCIAL A 0.11 0.40 0.100 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.475

SUBAREA AREA(ACRES) = 0.22 SUBAREA RUNOFF(CFS) = 0.85

EFFECTIVE AREA(ACRES) = 0.88 AREA-AVERAGED Fm(INCH/HR) = 0.26

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.65

TOTAL AREA(ACRES) = 0.9 PEAK FLOW RATE(CFS) = 3.34

END OF SUBAREA STREET FLOW HYDRAULICS:

DEPTH(FEET) = 0.36 HALFSTREET FLOOD WIDTH(FEET) = 11.63

FLOW VELOCITY(FEET/SEC.) = 2.27 DEPTH*VELOCITY(FT*FT/SEC.) = 0.81

LONGEST FLOWPATH FROM NODE 80.00 TO NODE 82.00 = 470.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 82.00 TO NODE 83.00 IS CODE = 61

----------------------------------------------------------------------------

>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>(STANDARD CURB SECTION USED)<<<<<

============================================================================

UPSTREAM ELEVATION(FEET) = 238.80 DOWNSTREAM ELEVATION(FEET) = 238.50

STREET LENGTH(FEET) = 90.00 CURB HEIGHT(INCHES) = 8.0

STREET HALFWIDTH(FEET) = 84.00

DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 30.00

INSIDE STREET CROSSFALL(DECIMAL) = 0.020

OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020

SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1

STREET PARKWAY CROSSFALL(DECIMAL) = 0.020

Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150

Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200

**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 3.62

STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:

STREET FLOW DEPTH(FEET) = 0.44

HALFSTREET FLOOD WIDTH(FEET) = 14.31

AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.62

PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.72

STREET FLOW TRAVEL TIME(MIN.) = 0.93 Tc(MIN.) = 9.71

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.229

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

PUBLIC PARK A 0.16 0.40 0.850 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850

SUBAREA AREA(ACRES) = 0.16 SUBAREA RUNOFF(CFS) = 0.56

EFFECTIVE AREA(ACRES) = 1.04 AREA-AVERAGED Fm(INCH/HR) = 0.27

Page 25

PCEX100

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.68

TOTAL AREA(ACRES) = 1.0 PEAK FLOW RATE(CFS) = 3.70

END OF SUBAREA STREET FLOW HYDRAULICS:

DEPTH(FEET) = 0.45 HALFSTREET FLOOD WIDTH(FEET) = 14.42

FLOW VELOCITY(FEET/SEC.) = 1.63 DEPTH*VELOCITY(FT*FT/SEC.) = 0.73

LONGEST FLOWPATH FROM NODE 80.00 TO NODE 83.00 = 560.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 90.00 TO NODE 91.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 280.00

ELEVATION DATA: UPSTREAM(FEET) = 241.90 DOWNSTREAM(FEET) = 240.90

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.937

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.436

SUBAREA Tc AND LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.64 0.40 0.100 52 8.94

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 2.53

TOTAL AREA(ACRES) = 0.64 PEAK FLOW RATE(CFS) = 2.53

****************************************************************************

FLOW PROCESS FROM NODE 91.00 TO NODE 92.00 IS CODE = 61

----------------------------------------------------------------------------

>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>(STANDARD CURB SECTION USED)<<<<<

============================================================================

UPSTREAM ELEVATION(FEET) = 240.90 DOWNSTREAM ELEVATION(FEET) = 239.50

STREET LENGTH(FEET) = 270.00 CURB HEIGHT(INCHES) = 6.0

STREET HALFWIDTH(FEET) = 30.00

DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 25.00

INSIDE STREET CROSSFALL(DECIMAL) = 0.020

OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020

SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1

STREET PARKWAY CROSSFALL(DECIMAL) = 0.020

Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150

Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200

**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 3.43

STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:

STREET FLOW DEPTH(FEET) = 0.39

HALFSTREET FLOOD WIDTH(FEET) = 13.06

AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.88

Page 26

PCEX100

PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.73

STREET FLOW TRAVEL TIME(MIN.) = 2.39 Tc(MIN.) = 11.33

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.872

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.52 0.40 0.100 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 0.52 SUBAREA RUNOFF(CFS) = 1.79

EFFECTIVE AREA(ACRES) = 1.16 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 1.2 PEAK FLOW RATE(CFS) = 4.00

END OF SUBAREA STREET FLOW HYDRAULICS:

DEPTH(FEET) = 0.40 HALFSTREET FLOOD WIDTH(FEET) = 13.94

FLOW VELOCITY(FEET/SEC.) = 1.94 DEPTH*VELOCITY(FT*FT/SEC.) = 0.79

LONGEST FLOWPATH FROM NODE 90.00 TO NODE 92.00 = 550.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 92.00 TO NODE 92.00 IS CODE = 10

----------------------------------------------------------------------------

>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<<

============================================================================

****************************************************************************

FLOW PROCESS FROM NODE 100.00 TO NODE 101.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 295.00

ELEVATION DATA: UPSTREAM(FEET) = 241.90 DOWNSTREAM(FEET) = 240.90

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 9.221

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.357

SUBAREA Tc AND LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.79 0.40 0.100 52 9.22

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 3.07

TOTAL AREA(ACRES) = 0.79 PEAK FLOW RATE(CFS) = 3.07

****************************************************************************

FLOW PROCESS FROM NODE 101.00 TO NODE 92.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 9.22

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.357

Page 27

PCEX100

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.44 0.40 0.100 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 0.44 SUBAREA RUNOFF(CFS) = 1.71

EFFECTIVE AREA(ACRES) = 1.23 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 1.2 PEAK FLOW RATE(CFS) = 4.78

****************************************************************************

FLOW PROCESS FROM NODE 92.00 TO NODE 92.00 IS CODE = 11

----------------------------------------------------------------------------

>>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<<

============================================================================

** MAIN STREAM CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 4.78 9.22 4.357 0.40( 0.04) 0.10 1.2 100.00

LONGEST FLOWPATH FROM NODE 100.00 TO NODE 92.00 = 295.00 FEET.

** MEMORY BANK # 1 CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 4.00 11.33 3.872 0.40( 0.04) 0.10 1.2 90.00

LONGEST FLOWPATH FROM NODE 90.00 TO NODE 92.00 = 550.00 FEET.

** PEAK FLOW RATE TABLE **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 8.45 9.22 4.357 0.40( 0.04) 0.10 2.2 100.00

2 8.24 11.33 3.872 0.40( 0.04) 0.10 2.4 90.00

TOTAL AREA(ACRES) = 2.4

COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:

PEAK FLOW RATE(CFS) = 8.45 Tc(MIN.) = 9.221

EFFECTIVE AREA(ACRES) = 2.17 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 2.4

LONGEST FLOWPATH FROM NODE 90.00 TO NODE 92.00 = 550.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 92.00 TO NODE 93.00 IS CODE = 61

----------------------------------------------------------------------------

>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>(STANDARD CURB SECTION USED)<<<<<

============================================================================

UPSTREAM ELEVATION(FEET) = 239.50 DOWNSTREAM ELEVATION(FEET) = 239.10

STREET LENGTH(FEET) = 100.00 CURB HEIGHT(INCHES) = 6.0

STREET HALFWIDTH(FEET) = 30.00

Page 28

PCEX100

DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 25.00

INSIDE STREET CROSSFALL(DECIMAL) = 0.020

OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020

SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1

STREET PARKWAY CROSSFALL(DECIMAL) = 0.020

Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150

Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200

**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 8.63

STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:

STREET FLOW DEPTH(FEET) = 0.52

HALFSTREET FLOOD WIDTH(FEET) = 20.90

AVERAGE FLOW VELOCITY(FEET/SEC.) = 2.13

PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 1.11

STREET FLOW TRAVEL TIME(MIN.) = 0.78 Tc(MIN.) = 10.00

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.159

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.10 0.40 0.100 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 0.10 SUBAREA RUNOFF(CFS) = 0.37

EFFECTIVE AREA(ACRES) = 2.27 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 2.5 PEAK FLOW RATE(CFS) = 8.45

NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE

END OF SUBAREA STREET FLOW HYDRAULICS:

DEPTH(FEET) = 0.52 HALFSTREET FLOOD WIDTH(FEET) = 20.71

FLOW VELOCITY(FEET/SEC.) = 2.11 DEPTH*VELOCITY(FT*FT/SEC.) = 1.10

LONGEST FLOWPATH FROM NODE 90.00 TO NODE 93.00 = 650.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 94.00 TO NODE 95.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 190.00

ELEVATION DATA: UPSTREAM(FEET) = 242.10 DOWNSTREAM(FEET) = 240.10

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.165

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 5.488

SUBAREA Tc AND LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.39 0.40 0.100 52 6.16

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 1.91

Page 29

PCEX100

TOTAL AREA(ACRES) = 0.39 PEAK FLOW RATE(CFS) = 1.91

****************************************************************************

FLOW PROCESS FROM NODE 96.00 TO NODE 97.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 200.00

ELEVATION DATA: UPSTREAM(FEET) = 241.30 DOWNSTREAM(FEET) = 240.20

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.165

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 5.035

SUBAREA Tc AND LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.52 0.40 0.100 52 7.16

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 2.34

TOTAL AREA(ACRES) = 0.52 PEAK FLOW RATE(CFS) = 2.34

****************************************************************************

FLOW PROCESS FROM NODE 98.00 TO NODE 99.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 160.00

ELEVATION DATA: UPSTREAM(FEET) = 241.40 DOWNSTREAM(FEET) = 240.70

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.860

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 5.162

SUBAREA Tc AND LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 1.06 0.40 0.100 52 6.86

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 4.89

TOTAL AREA(ACRES) = 1.06 PEAK FLOW RATE(CFS) = 4.89

****************************************************************************

FLOW PROCESS FROM NODE 102.00 TO NODE 103.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 150.00

ELEVATION DATA: UPSTREAM(FEET) = 242.40 DOWNSTREAM(FEET) = 241.30

Page 30

PCEX100

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.029

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 5.558

SUBAREA Tc AND LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.27 0.40 0.100 52 6.03

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 1.34

TOTAL AREA(ACRES) = 0.27 PEAK FLOW RATE(CFS) = 1.34

============================================================================

END OF STUDY SUMMARY:

TOTAL AREA(ACRES) = 0.3 TC(MIN.) = 6.03

EFFECTIVE AREA(ACRES) = 0.27 AREA-AVERAGED Fm(INCH/HR)= 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.100

PEAK FLOW RATE(CFS) = 1.34

============================================================================

============================================================================

END OF RATIONAL METHOD ANALYSIS

�

Page 31

HYDROLOGY REPORT August 2017

Pacific Center City of Anaheim, CA

APPENDIX 3

10-Year Hydrology Study, Proposed Condition

PCPD10

____________________________________________________________________________

****************************************************************************

RATIONAL METHOD HYDROLOGY COMPUTER PROGRAM PACKAGE

(Reference: 1986 ORANGE COUNTY HYDROLOGY CRITERION)

(c) Copyright 1983-2014 Advanced Engineering Software (aes)

Ver. 21.0 Release Date: 06/01/2014 License ID 1355

Analysis prepared by:

Fuscoe Engineering

16795 Von Karman Ave

Suite 100

Irvine CA, 92606

************************** DESCRIPTION OF STUDY **************************

* PACIFIC CENTER - ANAHEIM *

* PROPOSED DEVELOPMENT HYDROLOGY *

* 10 YEAR EVENT *

**************************************************************************

FILE NAME: PCPD10.DAT

TIME/DATE OF STUDY: 11:33 07/31/2017

============================================================================

USER SPECIFIED HYDROLOGY AND HYDRAULIC MODEL INFORMATION:

============================================================================

--*TIME-OF-CONCENTRATION MODEL*--

USER SPECIFIED STORM EVENT(YEAR) = 10.00

SPECIFIED MINIMUM PIPE SIZE(INCH) = 12.00

SPECIFIED PERCENT OF GRADIENTS(DECIMAL) TO USE FOR FRICTION SLOPE = 0.90

*DATA BANK RAINFALL USED*

*ANTECEDENT MOISTURE CONDITION (AMC) II ASSUMED FOR RATIONAL METHOD*

*USER-DEFINED STREET-SECTIONS FOR COUPLED PIPEFLOW AND STREETFLOW MODEL*

HALF- CROWN TO STREET-CROSSFALL: CURB GUTTER-GEOMETRIES: MANNING

WIDTH CROSSFALL IN- / OUT-/PARK- HEIGHT WIDTH LIP HIKE FACTOR

NO. (FT) (FT) SIDE / SIDE/ WAY (FT) (FT) (FT) (FT) (n)

=== ===== ========= ================= ====== ===== ====== ===== =======

1 30.0 20.0 0.018/0.018/0.020 0.67 2.00 0.0313 0.167 0.0150

GLOBAL STREET FLOW-DEPTH CONSTRAINTS:

1. Relative Flow-Depth = 0.50 FEET

as (Maximum Allowable Street Flow Depth) - (Top-of-Curb)

2. (Depth)*(Velocity) Constraint = 5.0 (FT*FT/S)

*SIZE PIPE WITH A FLOW CAPACITY GREATER THAN

OR EQUAL TO THE UPSTREAM TRIBUTARY PIPE.*

*USER-SPECIFIED MINIMUM TOPOGRAPHIC SLOPE ADJUSTMENT NOT SELECTED

****************************************************************************

FLOW PROCESS FROM NODE 10.00 TO NODE 11.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

Page 1

PCPD10

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 370.00

ELEVATION DATA: UPSTREAM(FEET) = 243.30 DOWNSTREAM(FEET) = 239.00

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.410

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.014

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

APARTMENTS A 0.89 0.40 0.200 32 8.41

PUBLIC PARK A 0.21 0.40 0.850 32 12.54

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.324

SUBAREA RUNOFF(CFS) = 2.86

TOTAL AREA(ACRES) = 1.10 PEAK FLOW RATE(CFS) = 2.86

****************************************************************************

FLOW PROCESS FROM NODE 11.00 TO NODE 11.00 IS CODE = 10

----------------------------------------------------------------------------

>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<<

============================================================================

****************************************************************************

FLOW PROCESS FROM NODE 12.00 TO NODE 13.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 275.00

ELEVATION DATA: UPSTREAM(FEET) = 243.00 DOWNSTREAM(FEET) = 240.10

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.615

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.190

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

APARTMENTS A 0.58 0.40 0.200 32 7.61

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.200

SUBAREA RUNOFF(CFS) = 1.62

TOTAL AREA(ACRES) = 0.58 PEAK FLOW RATE(CFS) = 1.62

****************************************************************************

FLOW PROCESS FROM NODE 13.00 TO NODE 13.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 7.61

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.190

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

Page 2

PCPD10

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

APARTMENTS A 0.37 0.40 0.200 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.200

SUBAREA AREA(ACRES) = 0.37 SUBAREA RUNOFF(CFS) = 1.04

EFFECTIVE AREA(ACRES) = 0.95 AREA-AVERAGED Fm(INCH/HR) = 0.08

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.20

TOTAL AREA(ACRES) = 0.9 PEAK FLOW RATE(CFS) = 2.66

****************************************************************************

FLOW PROCESS FROM NODE 13.00 TO NODE 14.00 IS CODE = 61

----------------------------------------------------------------------------

>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>(STANDARD CURB SECTION USED)<<<<<

============================================================================

UPSTREAM ELEVATION(FEET) = 240.10 DOWNSTREAM ELEVATION(FEET) = 238.80

STREET LENGTH(FEET) = 150.00 CURB HEIGHT(INCHES) = 6.0

STREET HALFWIDTH(FEET) = 40.00

DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 20.00

INSIDE STREET CROSSFALL(DECIMAL) = 0.020

OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020

SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1

STREET PARKWAY CROSSFALL(DECIMAL) = 0.020

Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150

Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200

**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 2.96

STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:

STREET FLOW DEPTH(FEET) = 0.35

HALFSTREET FLOOD WIDTH(FEET) = 11.08

AVERAGE FLOW VELOCITY(FEET/SEC.) = 2.20

PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.76

STREET FLOW TRAVEL TIME(MIN.) = 1.14 Tc(MIN.) = 8.75

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.945

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

APARTMENTS A 0.23 0.40 0.200 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.200

SUBAREA AREA(ACRES) = 0.23 SUBAREA RUNOFF(CFS) = 0.59

EFFECTIVE AREA(ACRES) = 1.18 AREA-AVERAGED Fm(INCH/HR) = 0.08

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.20

TOTAL AREA(ACRES) = 1.2 PEAK FLOW RATE(CFS) = 3.04

END OF SUBAREA STREET FLOW HYDRAULICS:

DEPTH(FEET) = 0.35 HALFSTREET FLOOD WIDTH(FEET) = 11.22

FLOW VELOCITY(FEET/SEC.) = 2.21 DEPTH*VELOCITY(FT*FT/SEC.) = 0.77

LONGEST FLOWPATH FROM NODE 12.00 TO NODE 14.00 = 425.00 FEET.

****************************************************************************

Page 3

PCPD10

FLOW PROCESS FROM NODE 14.00 TO NODE 11.10 IS CODE = 61

----------------------------------------------------------------------------

>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>(STANDARD CURB SECTION USED)<<<<<

============================================================================

UPSTREAM ELEVATION(FEET) = 238.80 DOWNSTREAM ELEVATION(FEET) = 238.50

STREET LENGTH(FEET) = 90.00 CURB HEIGHT(INCHES) = 8.0

STREET HALFWIDTH(FEET) = 84.00

DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 30.00

INSIDE STREET CROSSFALL(DECIMAL) = 0.020

OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020

SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1

STREET PARKWAY CROSSFALL(DECIMAL) = 0.020

Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150

Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200

**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 3.06

STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:

STREET FLOW DEPTH(FEET) = 0.42

HALFSTREET FLOOD WIDTH(FEET) = 13.30

AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.56

PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.66

STREET FLOW TRAVEL TIME(MIN.) = 0.96 Tc(MIN.) = 9.71

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.775

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.01 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 0.01 SUBAREA RUNOFF(CFS) = 0.02

EFFECTIVE AREA(ACRES) = 1.19 AREA-AVERAGED Fm(INCH/HR) = 0.08

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.20

TOTAL AREA(ACRES) = 1.2 PEAK FLOW RATE(CFS) = 3.04

NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE

END OF SUBAREA STREET FLOW HYDRAULICS:

DEPTH(FEET) = 0.42 HALFSTREET FLOOD WIDTH(FEET) = 13.30

FLOW VELOCITY(FEET/SEC.) = 1.55 DEPTH*VELOCITY(FT*FT/SEC.) = 0.66

LONGEST FLOWPATH FROM NODE 12.00 TO NODE 11.10 = 515.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 11.10 TO NODE 11.10 IS CODE = 11

----------------------------------------------------------------------------

>>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<<

============================================================================

** MAIN STREAM CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 3.04 9.71 2.775 0.40( 0.08) 0.20 1.2 12.00

Page 4

PCPD10

LONGEST FLOWPATH FROM NODE 12.00 TO NODE 11.10 = 515.00 FEET.

** MEMORY BANK # 1 CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 2.86 8.41 3.014 0.40( 0.13) 0.32 1.1 10.00

LONGEST FLOWPATH FROM NODE 10.00 TO NODE 11.10 = 370.00 FEET.

** PEAK FLOW RATE TABLE **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 5.72 8.41 3.014 0.40( 0.11) 0.26 2.1 10.00

2 5.66 9.71 2.775 0.40( 0.10) 0.26 2.3 12.00

TOTAL AREA(ACRES) = 2.3

COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:

PEAK FLOW RATE(CFS) = 5.72 Tc(MIN.) = 8.410

EFFECTIVE AREA(ACRES) = 2.13 AREA-AVERAGED Fm(INCH/HR) = 0.11

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.26

TOTAL AREA(ACRES) = 2.3

LONGEST FLOWPATH FROM NODE 12.00 TO NODE 11.10 = 515.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 11.10 TO NODE 11.10 IS CODE = 12

----------------------------------------------------------------------------

>>>>>CLEAR MEMORY BANK # 1 <<<<<

============================================================================

****************************************************************************

FLOW PROCESS FROM NODE 20.00 TO NODE 21.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 320.00

ELEVATION DATA: UPSTREAM(FEET) = 242.90 DOWNSTREAM(FEET) = 238.10

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.540

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.208

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

APARTMENTS A 0.86 0.40 0.200 32 7.54

PUBLIC PARK A 0.38 0.40 0.850 32 11.24

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.399

SUBAREA RUNOFF(CFS) = 3.40

TOTAL AREA(ACRES) = 1.24 PEAK FLOW RATE(CFS) = 3.40

****************************************************************************

FLOW PROCESS FROM NODE 21.00 TO NODE 22.00 IS CODE = 56

----------------------------------------------------------------------------

Page 5

PCPD10

>>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<

>>>>>TRAVELTIME THRU SUBAREA<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 238.10 DOWNSTREAM(FEET) = 237.50

CHANNEL LENGTH THRU SUBAREA(FEET) = 150.00 CHANNEL SLOPE = 0.0040

GIVEN CHANNEL BASE(FEET) = 4.00 CHANNEL FREEBOARD(FEET) = 1.0

"Z" FACTOR = 0.000 MANNING'S FACTOR = 0.015

*ESTIMATED CHANNEL HEIGHT(FEET) = 1.35

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.008

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.20 0.40 0.100 32

PUBLIC PARK A 0.16 0.40 0.850 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.433

TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 3.86

TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 2.79

AVERAGE FLOW DEPTH(FEET) = 0.35 TRAVEL TIME(MIN.) = 0.90

Tc(MIN.) = 8.44

SUBAREA AREA(ACRES) = 0.36 SUBAREA RUNOFF(CFS) = 0.92

EFFECTIVE AREA(ACRES) = 1.60 AREA-AVERAGED Fm(INCH/HR) = 0.16

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.41

TOTAL AREA(ACRES) = 1.6 PEAK FLOW RATE(CFS) = 4.10

GIVEN CHANNEL BASE(FEET) = 4.00 CHANNEL FREEBOARD(FEET) = 1.0

"Z" FACTOR = 0.000 MANNING'S FACTOR = 0.015

*ESTIMATED CHANNEL HEIGHT(FEET) = 1.36

END OF SUBAREA CHANNEL FLOW HYDRAULICS:

DEPTH(FEET) = 0.36 FLOW VELOCITY(FEET/SEC.) = 2.83

LONGEST FLOWPATH FROM NODE 20.00 TO NODE 22.00 = 470.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 22.00 TO NODE 22.00 IS CODE = 10

----------------------------------------------------------------------------

>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<<

============================================================================

****************************************************************************

FLOW PROCESS FROM NODE 30.00 TO NODE 31.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 380.00

ELEVATION DATA: UPSTREAM(FEET) = 243.00 DOWNSTREAM(FEET) = 239.10

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.176

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.063

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

Page 6

PCPD10

COMMERCIAL A 1.66 0.40 0.100 32 8.18

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 4.52

TOTAL AREA(ACRES) = 1.66 PEAK FLOW RATE(CFS) = 4.52

****************************************************************************

FLOW PROCESS FROM NODE 31.00 TO NODE 22.00 IS CODE = 91

----------------------------------------------------------------------------

>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<

============================================================================

UPSTREAM NODE ELEVATION(FEET) = 239.10

DOWNSTREAM NODE ELEVATION(FEET) = 237.50

CHANNEL LENGTH THRU SUBAREA(FEET) = 360.00

"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080

PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150

PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000

MAXIMUM DEPTH(FEET) = 1.00

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.540

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 1.91 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 6.67

TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 1.90

AVERAGE FLOW DEPTH(FEET) = 0.34 FLOOD WIDTH(FEET) = 25.86

"V" GUTTER FLOW TRAVEL TIME(MIN.) = 3.16 Tc(MIN.) = 11.33

SUBAREA AREA(ACRES) = 1.91 SUBAREA RUNOFF(CFS) = 4.30

EFFECTIVE AREA(ACRES) = 3.57 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 3.6 PEAK FLOW RATE(CFS) = 8.03

END OF SUBAREA "V" GUTTER HYDRAULICS:

DEPTH(FEET) = 0.36 FLOOD WIDTH(FEET) = 27.94

FLOW VELOCITY(FEET/SEC.) = 1.97 DEPTH*VELOCITY(FT*FT/SEC) = 0.71

LONGEST FLOWPATH FROM NODE 30.00 TO NODE 22.00 = 740.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 22.00 TO NODE 22.00 IS CODE = 11

----------------------------------------------------------------------------

>>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<<

============================================================================

** MAIN STREAM CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 8.03 11.33 2.540 0.40( 0.04) 0.10 3.6 30.00

LONGEST FLOWPATH FROM NODE 30.00 TO NODE 22.00 = 740.00 FEET.

** MEMORY BANK # 1 CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

Page 7

PCPD10

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 4.10 8.44 3.008 0.40( 0.16) 0.41 1.6 20.00

LONGEST FLOWPATH FROM NODE 20.00 TO NODE 22.00 = 470.00 FEET.

** PEAK FLOW RATE TABLE **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 11.20 8.44 3.008 0.40( 0.09) 0.22 4.3 20.00

2 11.46 11.33 2.540 0.40( 0.08) 0.19 5.2 30.00

TOTAL AREA(ACRES) = 5.2

COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:

PEAK FLOW RATE(CFS) = 11.46 Tc(MIN.) = 11.334

EFFECTIVE AREA(ACRES) = 5.17 AREA-AVERAGED Fm(INCH/HR) = 0.08

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.22

TOTAL AREA(ACRES) = 5.2

LONGEST FLOWPATH FROM NODE 30.00 TO NODE 22.00 = 740.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 22.00 TO NODE 23.00 IS CODE = 51

----------------------------------------------------------------------------

>>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<

>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 237.50 DOWNSTREAM(FEET) = 236.80

CHANNEL LENGTH THRU SUBAREA(FEET) = 70.00 CHANNEL SLOPE = 0.0100

CHANNEL BASE(FEET) = 4.00 "Z" FACTOR = 0.000

MANNING'S FACTOR = 0.015 MAXIMUM DEPTH(FEET) = 1.00

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.513

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

PUBLIC PARK A 0.08 0.40 0.850 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850

TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 11.53

TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 5.51

AVERAGE FLOW DEPTH(FEET) = 0.52 TRAVEL TIME(MIN.) = 0.21

Tc(MIN.) = 11.55

SUBAREA AREA(ACRES) = 0.08 SUBAREA RUNOFF(CFS) = 0.16

EFFECTIVE AREA(ACRES) = 5.25 AREA-AVERAGED Fm(INCH/HR) = 0.08

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.20

TOTAL AREA(ACRES) = 5.2 PEAK FLOW RATE(CFS) = 11.49

END OF SUBAREA CHANNEL FLOW HYDRAULICS:

DEPTH(FEET) = 0.52 FLOW VELOCITY(FEET/SEC.) = 5.51

LONGEST FLOWPATH FROM NODE 30.00 TO NODE 23.00 = 810.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 23.00 TO NODE 23.00 IS CODE = 10

----------------------------------------------------------------------------

>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 2 <<<<<

============================================================================

Page 8

PCPD10

****************************************************************************

FLOW PROCESS FROM NODE 40.00 TO NODE 41.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 300.00

ELEVATION DATA: UPSTREAM(FEET) = 241.50 DOWNSTREAM(FEET) = 240.60

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 9.513

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.808

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.69 0.40 0.100 32 9.51

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 1.72

TOTAL AREA(ACRES) = 0.69 PEAK FLOW RATE(CFS) = 1.72

****************************************************************************

FLOW PROCESS FROM NODE 41.00 TO NODE 42.00 IS CODE = 61

----------------------------------------------------------------------------

>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>(STANDARD CURB SECTION USED)<<<<<

============================================================================

UPSTREAM ELEVATION(FEET) = 240.60 DOWNSTREAM ELEVATION(FEET) = 239.50

STREET LENGTH(FEET) = 300.00 CURB HEIGHT(INCHES) = 6.0

STREET HALFWIDTH(FEET) = 40.00

DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 20.00

INSIDE STREET CROSSFALL(DECIMAL) = 0.020

OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020

SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1

STREET PARKWAY CROSSFALL(DECIMAL) = 0.020

Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150

Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200

**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 2.14

STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:

STREET FLOW DEPTH(FEET) = 0.36

HALFSTREET FLOOD WIDTH(FEET) = 11.58

AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.46

PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.52

STREET FLOW TRAVEL TIME(MIN.) = 3.41 Tc(MIN.) = 12.93

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.356

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.40 0.40 0.100 32

Page 9

PCPD10

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 0.40 SUBAREA RUNOFF(CFS) = 0.83

EFFECTIVE AREA(ACRES) = 1.09 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 1.1 PEAK FLOW RATE(CFS) = 2.27

END OF SUBAREA STREET FLOW HYDRAULICS:

DEPTH(FEET) = 0.36 HALFSTREET FLOOD WIDTH(FEET) = 11.87

FLOW VELOCITY(FEET/SEC.) = 1.49 DEPTH*VELOCITY(FT*FT/SEC.) = 0.54

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 42.00 = 600.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 42.00 TO NODE 42.00 IS CODE = 10

----------------------------------------------------------------------------

>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 3 <<<<<

============================================================================

****************************************************************************

FLOW PROCESS FROM NODE 50.00 TO NODE 45.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 330.00

ELEVATION DATA: UPSTREAM(FEET) = 241.50 DOWNSTREAM(FEET) = 240.20

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 9.358

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.835

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 1.72 0.40 0.100 32 9.36

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 4.33

TOTAL AREA(ACRES) = 1.72 PEAK FLOW RATE(CFS) = 4.33

****************************************************************************

FLOW PROCESS FROM NODE 45.00 TO NODE 42.00 IS CODE = 91

----------------------------------------------------------------------------

>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<

============================================================================

UPSTREAM NODE ELEVATION(FEET) = 240.20

DOWNSTREAM NODE ELEVATION(FEET) = 239.50

CHANNEL LENGTH THRU SUBAREA(FEET) = 160.00

"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080

PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150

PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000

MAXIMUM DEPTH(FEET) = 0.50

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.608

SUBAREA LOSS RATE DATA(AMC II):

Page 10

PCPD10

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 1.15 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 5.66

TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 1.82

AVERAGE FLOW DEPTH(FEET) = 0.32 FLOOD WIDTH(FEET) = 24.25

"V" GUTTER FLOW TRAVEL TIME(MIN.) = 1.46 Tc(MIN.) = 10.82

SUBAREA AREA(ACRES) = 1.15 SUBAREA RUNOFF(CFS) = 2.66

EFFECTIVE AREA(ACRES) = 2.87 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 2.9 PEAK FLOW RATE(CFS) = 6.63

END OF SUBAREA "V" GUTTER HYDRAULICS:

DEPTH(FEET) = 0.34 FLOOD WIDTH(FEET) = 25.93

FLOW VELOCITY(FEET/SEC.) = 1.88 DEPTH*VELOCITY(FT*FT/SEC) = 0.64

LONGEST FLOWPATH FROM NODE 50.00 TO NODE 42.00 = 490.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 42.00 TO NODE 42.00 IS CODE = 11

----------------------------------------------------------------------------

>>>>>CONFLUENCE MEMORY BANK # 3 WITH THE MAIN-STREAM MEMORY<<<<<

============================================================================

** MAIN STREAM CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 6.63 10.82 2.608 0.40( 0.04) 0.10 2.9 50.00

LONGEST FLOWPATH FROM NODE 50.00 TO NODE 42.00 = 490.00 FEET.

** MEMORY BANK # 3 CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 2.27 12.93 2.356 0.40( 0.04) 0.10 1.1 40.00

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 42.00 = 600.00 FEET.

** PEAK FLOW RATE TABLE **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 8.74 10.82 2.608 0.40( 0.04) 0.10 3.8 50.00

2 8.25 12.93 2.356 0.40( 0.04) 0.10 4.0 40.00

TOTAL AREA(ACRES) = 4.0

COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:

PEAK FLOW RATE(CFS) = 8.74 Tc(MIN.) = 10.822

EFFECTIVE AREA(ACRES) = 3.78 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 4.0

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 42.00 = 600.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 42.00 TO NODE 43.00 IS CODE = 91

Page 11

PCPD10

----------------------------------------------------------------------------

>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<

============================================================================

UPSTREAM NODE ELEVATION(FEET) = 239.50

DOWNSTREAM NODE ELEVATION(FEET) = 239.20

CHANNEL LENGTH THRU SUBAREA(FEET) = 50.00

"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080

PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150

PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000

MAXIMUM DEPTH(FEET) = 0.50

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.559

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.40 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 9.20

TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 2.29

AVERAGE FLOW DEPTH(FEET) = 0.36 FLOOD WIDTH(FEET) = 27.76

"V" GUTTER FLOW TRAVEL TIME(MIN.) = 0.36 Tc(MIN.) = 11.19

SUBAREA AREA(ACRES) = 0.40 SUBAREA RUNOFF(CFS) = 0.91

EFFECTIVE AREA(ACRES) = 4.18 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 4.4 PEAK FLOW RATE(CFS) = 9.48

END OF SUBAREA "V" GUTTER HYDRAULICS:

DEPTH(FEET) = 0.36 FLOOD WIDTH(FEET) = 28.06

FLOW VELOCITY(FEET/SEC.) = 2.31 DEPTH*VELOCITY(FT*FT/SEC) = 0.83

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 43.00 = 650.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 43.00 TO NODE 23.00 IS CODE = 41

----------------------------------------------------------------------------

>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 237.20 DOWNSTREAM(FEET) = 236.80

FLOW LENGTH(FEET) = 450.00 MANNING'S N = 0.011

ASSUME FULL-FLOWING PIPELINE

PIPE-FLOW VELOCITY(FEET/SEC.) = 12.07

PIPE FLOW VELOCITY = (TOTAL FLOW)/(PIPE CROSS SECTION AREA)

GIVEN PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1

PIPE-FLOW(CFS) = 9.48

PIPE TRAVEL TIME(MIN.) = 0.62 Tc(MIN.) = 11.81

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 23.00 = 1100.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 23.00 TO NODE 23.00 IS CODE = 11

----------------------------------------------------------------------------

>>>>>CONFLUENCE MEMORY BANK # 2 WITH THE MAIN-STREAM MEMORY<<<<<

============================================================================

Page 12

PCPD10

** MAIN STREAM CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 9.48 11.81 2.481 0.40( 0.04) 0.10 4.2 50.00

2 8.94 13.96 2.254 0.40( 0.04) 0.10 4.4 40.00

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 23.00 = 1100.00 FEET.

** MEMORY BANK # 2 CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 11.22 8.65 2.965 0.40( 0.09) 0.23 4.3 20.00

2 11.49 11.55 2.513 0.40( 0.08) 0.20 5.2 30.00

LONGEST FLOWPATH FROM NODE 30.00 TO NODE 23.00 = 810.00 FEET.

** PEAK FLOW RATE TABLE **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 19.55 8.65 2.965 0.40( 0.07) 0.17 7.4 20.00

2 20.88 11.55 2.513 0.40( 0.06) 0.16 9.3 30.00

3 20.82 11.81 2.481 0.40( 0.06) 0.16 9.4 50.00

4 19.20 13.96 2.254 0.40( 0.06) 0.16 9.6 40.00

TOTAL AREA(ACRES) = 9.6

COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:

PEAK FLOW RATE(CFS) = 20.88 Tc(MIN.) = 11.546

EFFECTIVE AREA(ACRES) = 9.34 AREA-AVERAGED Fm(INCH/HR) = 0.06

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.16

TOTAL AREA(ACRES) = 9.6

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 23.00 = 1100.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 23.00 TO NODE 24.00 IS CODE = 51

----------------------------------------------------------------------------

>>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<

>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 236.80 DOWNSTREAM(FEET) = 235.80

CHANNEL LENGTH THRU SUBAREA(FEET) = 250.00 CHANNEL SLOPE = 0.0040

CHANNEL BASE(FEET) = 7.00 "Z" FACTOR = 0.000

MANNING'S FACTOR = 0.015 MAXIMUM DEPTH(FEET) = 1.50

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.406

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

APARTMENTS A 2.78 0.40 0.200 32

PUBLIC PARK A 0.29 0.40 0.850 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.261

TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 24.06

TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 4.57

AVERAGE FLOW DEPTH(FEET) = 0.75 TRAVEL TIME(MIN.) = 0.91

Tc(MIN.) = 12.46

SUBAREA AREA(ACRES) = 3.07 SUBAREA RUNOFF(CFS) = 6.36

Page 13

PCPD10

EFFECTIVE AREA(ACRES) = 12.41 AREA-AVERAGED Fm(INCH/HR) = 0.07

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.18

TOTAL AREA(ACRES) = 12.7 PEAK FLOW RATE(CFS) = 26.05

END OF SUBAREA CHANNEL FLOW HYDRAULICS:

DEPTH(FEET) = 0.80 FLOW VELOCITY(FEET/SEC.) = 4.67

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 24.00 = 1350.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 24.00 TO NODE 25.00 IS CODE = 51

----------------------------------------------------------------------------

>>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<

>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 235.80 DOWNSTREAM(FEET) = 235.10

CHANNEL LENGTH THRU SUBAREA(FEET) = 135.00 CHANNEL SLOPE = 0.0052

CHANNEL BASE(FEET) = 7.00 "Z" FACTOR = 0.000

MANNING'S FACTOR = 0.015 MAXIMUM DEPTH(FEET) = 1.00

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.358

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

PUBLIC PARK A 0.15 0.40 0.850 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850

TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 26.19

TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 5.09

AVERAGE FLOW DEPTH(FEET) = 0.74 TRAVEL TIME(MIN.) = 0.44

Tc(MIN.) = 12.90

SUBAREA AREA(ACRES) = 0.15 SUBAREA RUNOFF(CFS) = 0.27

EFFECTIVE AREA(ACRES) = 12.56 AREA-AVERAGED Fm(INCH/HR) = 0.08

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.19

TOTAL AREA(ACRES) = 12.8 PEAK FLOW RATE(CFS) = 26.05

NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE

END OF SUBAREA CHANNEL FLOW HYDRAULICS:

DEPTH(FEET) = 0.73 FLOW VELOCITY(FEET/SEC.) = 5.10

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 25.00 = 1485.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 25.00 TO NODE 25.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 12.90

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.358

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 1.53 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 1.53 SUBAREA RUNOFF(CFS) = 3.19

Page 14

PCPD10

EFFECTIVE AREA(ACRES) = 14.09 AREA-AVERAGED Fm(INCH/HR) = 0.07

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.18

TOTAL AREA(ACRES) = 14.4 PEAK FLOW RATE(CFS) = 28.98

****************************************************************************

FLOW PROCESS FROM NODE 25.00 TO NODE 26.00 IS CODE = 52

----------------------------------------------------------------------------

>>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<

>>>>>TRAVELTIME THRU SUBAREA<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 235.10 DOWNSTREAM(FEET) = 234.10

CHANNEL LENGTH THRU SUBAREA(FEET) = 205.00 CHANNEL SLOPE = 0.0049

CHANNEL FLOW THRU SUBAREA(CFS) = 28.98

FLOW VELOCITY(FEET/SEC) = 2.32 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL)

TRAVEL TIME(MIN.) = 1.47 Tc(MIN.) = 14.37

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 26.00 = 1690.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 26.00 TO NODE 26.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 14.37

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.217

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

PUBLIC PARK A 0.29 0.40 0.850 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850

SUBAREA AREA(ACRES) = 0.29 SUBAREA RUNOFF(CFS) = 0.49

EFFECTIVE AREA(ACRES) = 14.38 AREA-AVERAGED Fm(INCH/HR) = 0.08

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.20

TOTAL AREA(ACRES) = 14.6 PEAK FLOW RATE(CFS) = 28.98

NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE

****************************************************************************

FLOW PROCESS FROM NODE 26.00 TO NODE 26.00 IS CODE = 1

----------------------------------------------------------------------------

>>>>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<<<<<

============================================================================

TOTAL NUMBER OF STREAMS = 2

CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE:

TIME OF CONCENTRATION(MIN.) = 14.37

RAINFALL INTENSITY(INCH/HR) = 2.22

AREA-AVERAGED Fm(INCH/HR) = 0.08

AREA-AVERAGED Fp(INCH/HR) = 0.40

AREA-AVERAGED Ap = 0.20

EFFECTIVE STREAM AREA(ACRES) = 14.38

TOTAL STREAM AREA(ACRES) = 14.65

PEAK FLOW RATE(CFS) AT CONFLUENCE = 28.98

****************************************************************************

Page 15

PCPD10

FLOW PROCESS FROM NODE 50.00 TO NODE 51.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 245.00

ELEVATION DATA: UPSTREAM(FEET) = 241.50 DOWNSTREAM(FEET) = 240.50

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.248

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.047

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.88 0.40 0.100 32 8.25

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 2.38

TOTAL AREA(ACRES) = 0.88 PEAK FLOW RATE(CFS) = 2.38

****************************************************************************

FLOW PROCESS FROM NODE 51.00 TO NODE 52.00 IS CODE = 41

----------------------------------------------------------------------------

>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 238.00 DOWNSTREAM(FEET) = 237.50

FLOW LENGTH(FEET) = 125.00 MANNING'S N = 0.011

DEPTH OF FLOW IN 12.0 INCH PIPE IS 9.3 INCHES

PIPE-FLOW VELOCITY(FEET/SEC.) = 3.65

GIVEN PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1

PIPE-FLOW(CFS) = 2.38

PIPE TRAVEL TIME(MIN.) = 0.57 Tc(MIN.) = 8.82

LONGEST FLOWPATH FROM NODE 50.00 TO NODE 52.00 = 370.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 52.00 TO NODE 52.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 8.82

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.933

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 1.21 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 1.21 SUBAREA RUNOFF(CFS) = 3.15

EFFECTIVE AREA(ACRES) = 2.09 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 2.1 PEAK FLOW RATE(CFS) = 5.44

Page 16

PCPD10

****************************************************************************

FLOW PROCESS FROM NODE 52.00 TO NODE 53.00 IS CODE = 41

----------------------------------------------------------------------------

>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 237.50 DOWNSTREAM(FEET) = 236.30

FLOW LENGTH(FEET) = 330.00 MANNING'S N = 0.011

ASSUME FULL-FLOWING PIPELINE

PIPE-FLOW VELOCITY(FEET/SEC.) = 6.93

PIPE FLOW VELOCITY = (TOTAL FLOW)/(PIPE CROSS SECTION AREA)

GIVEN PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1

PIPE-FLOW(CFS) = 5.44

PIPE TRAVEL TIME(MIN.) = 0.79 Tc(MIN.) = 9.61

LONGEST FLOWPATH FROM NODE 50.00 TO NODE 53.00 = 700.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 53.00 TO NODE 53.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 9.61

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.791

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 1.63 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 1.63 SUBAREA RUNOFF(CFS) = 4.04

EFFECTIVE AREA(ACRES) = 3.72 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 3.7 PEAK FLOW RATE(CFS) = 9.21

****************************************************************************

FLOW PROCESS FROM NODE 53.00 TO NODE 54.00 IS CODE = 41

----------------------------------------------------------------------------

>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 236.50 DOWNSTREAM(FEET) = 236.30

FLOW LENGTH(FEET) = 30.00 MANNING'S N = 0.011

ASSUME FULL-FLOWING PIPELINE

PIPE-FLOW VELOCITY(FEET/SEC.) = 11.73

PIPE FLOW VELOCITY = (TOTAL FLOW)/(PIPE CROSS SECTION AREA)

GIVEN PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1

PIPE-FLOW(CFS) = 9.21

PIPE TRAVEL TIME(MIN.) = 0.04 Tc(MIN.) = 9.66

LONGEST FLOWPATH FROM NODE 50.00 TO NODE 54.00 = 730.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 54.00 TO NODE 54.00 IS CODE = 81

----------------------------------------------------------------------------

Page 17

PCPD10

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 9.66

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.784

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.51 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 0.51 SUBAREA RUNOFF(CFS) = 1.26

EFFECTIVE AREA(ACRES) = 4.23 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 4.2 PEAK FLOW RATE(CFS) = 10.45

****************************************************************************

FLOW PROCESS FROM NODE 54.00 TO NODE 55.00 IS CODE = 52

----------------------------------------------------------------------------

>>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<

>>>>>TRAVELTIME THRU SUBAREA<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 236.30 DOWNSTREAM(FEET) = 235.50

CHANNEL LENGTH THRU SUBAREA(FEET) = 160.00 CHANNEL SLOPE = 0.0050

CHANNEL FLOW THRU SUBAREA(CFS) = 10.45

FLOW VELOCITY(FEET/SEC) = 1.79 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL)

TRAVEL TIME(MIN.) = 1.49 Tc(MIN.) = 11.15

LONGEST FLOWPATH FROM NODE 50.00 TO NODE 55.00 = 890.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 55.00 TO NODE 55.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 11.15

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.564

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

PUBLIC PARK A 0.18 0.40 0.850 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850

SUBAREA AREA(ACRES) = 0.18 SUBAREA RUNOFF(CFS) = 0.36

EFFECTIVE AREA(ACRES) = 4.41 AREA-AVERAGED Fm(INCH/HR) = 0.05

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.13

TOTAL AREA(ACRES) = 4.4 PEAK FLOW RATE(CFS) = 10.45

NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE

****************************************************************************

FLOW PROCESS FROM NODE 55.00 TO NODE 55.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 11.15

Page 18

PCPD10

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.564

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.31 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 0.31 SUBAREA RUNOFF(CFS) = 0.70

EFFECTIVE AREA(ACRES) = 4.72 AREA-AVERAGED Fm(INCH/HR) = 0.05

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.13

TOTAL AREA(ACRES) = 4.7 PEAK FLOW RATE(CFS) = 10.67

****************************************************************************

FLOW PROCESS FROM NODE 55.00 TO NODE 26.00 IS CODE = 52

----------------------------------------------------------------------------

>>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<

>>>>>TRAVELTIME THRU SUBAREA<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 235.50 DOWNSTREAM(FEET) = 234.10

CHANNEL LENGTH THRU SUBAREA(FEET) = 255.00 CHANNEL SLOPE = 0.0055

CHANNEL FLOW THRU SUBAREA(CFS) = 10.67

FLOW VELOCITY(FEET/SEC) = 1.88 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL)

TRAVEL TIME(MIN.) = 2.26 Tc(MIN.) = 13.40

LONGEST FLOWPATH FROM NODE 50.00 TO NODE 26.00 = 1145.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 26.00 TO NODE 26.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 13.40

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.307

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

PUBLIC PARK A 0.30 0.40 0.850 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850

SUBAREA AREA(ACRES) = 0.30 SUBAREA RUNOFF(CFS) = 0.53

EFFECTIVE AREA(ACRES) = 5.02 AREA-AVERAGED Fm(INCH/HR) = 0.07

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.17

TOTAL AREA(ACRES) = 5.0 PEAK FLOW RATE(CFS) = 10.67

NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE

****************************************************************************

FLOW PROCESS FROM NODE 26.00 TO NODE 26.00 IS CODE = 1

----------------------------------------------------------------------------

>>>>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<<<<<

>>>>>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES<<<<<

============================================================================

TOTAL NUMBER OF STREAMS = 2

CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE:

TIME OF CONCENTRATION(MIN.) = 13.40

Page 19

PCPD10

RAINFALL INTENSITY(INCH/HR) = 2.31

AREA-AVERAGED Fm(INCH/HR) = 0.07

AREA-AVERAGED Fp(INCH/HR) = 0.40

AREA-AVERAGED Ap = 0.17

EFFECTIVE STREAM AREA(ACRES) = 5.02

TOTAL STREAM AREA(ACRES) = 5.02

PEAK FLOW RATE(CFS) AT CONFLUENCE = 10.67

** CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 28.96 11.49 2.520 0.40( 0.08) 0.21 12.4 20.00

1 28.98 14.37 2.217 0.40( 0.08) 0.20 14.4 30.00

1 28.83 14.64 2.193 0.40( 0.08) 0.20 14.5 50.00

1 26.65 16.86 2.023 0.40( 0.08) 0.19 14.6 40.00

2 10.67 13.40 2.307 0.40( 0.07) 0.17 5.0 50.00

RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO

CONFLUENCE FORMULA USED FOR 2 STREAMS.

** PEAK FLOW RATE TABLE **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 38.98 11.49 2.520 0.40( 0.08) 0.20 16.7 20.00

2 39.65 13.40 2.307 0.40( 0.08) 0.19 18.7 50.00

3 39.22 14.37 2.217 0.40( 0.08) 0.19 19.4 30.00

4 38.96 14.64 2.193 0.40( 0.08) 0.19 19.5 50.00

5 35.97 16.86 2.023 0.40( 0.08) 0.19 19.7 40.00

COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:

PEAK FLOW RATE(CFS) = 39.65 Tc(MIN.) = 13.40

EFFECTIVE AREA(ACRES) = 18.75 AREA-AVERAGED Fm(INCH/HR) = 0.08

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.19

TOTAL AREA(ACRES) = 19.7

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 26.00 = 1690.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 26.00 TO NODE 27.00 IS CODE = 41

----------------------------------------------------------------------------

>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 234.10 DOWNSTREAM(FEET) = 233.20

FLOW LENGTH(FEET) = 55.00 MANNING'S N = 0.013

DEPTH OF FLOW IN 24.0 INCH PIPE IS 15.1 INCHES

PIPE-FLOW VELOCITY(FEET/SEC.) = 9.52

GIVEN PIPE DIAMETER(INCH) = 24.00 NUMBER OF PIPES = 2

PIPE-FLOW(CFS) = 39.65

PIPE TRAVEL TIME(MIN.) = 0.10 Tc(MIN.) = 13.50

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 27.00 = 1745.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 27.00 TO NODE 27.00 IS CODE = 81

Page 20

PCPD10

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 13.50

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.298

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

PUBLIC PARK A 0.51 0.40 0.850 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850

SUBAREA AREA(ACRES) = 0.51 SUBAREA RUNOFF(CFS) = 0.90

EFFECTIVE AREA(ACRES) = 19.26 AREA-AVERAGED Fm(INCH/HR) = 0.08

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.21

TOTAL AREA(ACRES) = 20.2 PEAK FLOW RATE(CFS) = 39.65

NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE

****************************************************************************

FLOW PROCESS FROM NODE 70.00 TO NODE 71.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 280.00

ELEVATION DATA: UPSTREAM(FEET) = 241.90 DOWNSTREAM(FEET) = 240.90

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.937

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.910

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.69 0.40 0.100 32 8.94

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 1.78

TOTAL AREA(ACRES) = 0.69 PEAK FLOW RATE(CFS) = 1.78

****************************************************************************

FLOW PROCESS FROM NODE 71.00 TO NODE 72.00 IS CODE = 61

----------------------------------------------------------------------------

>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>(STANDARD CURB SECTION USED)<<<<<

============================================================================

UPSTREAM ELEVATION(FEET) = 240.90 DOWNSTREAM ELEVATION(FEET) = 239.90

STREET LENGTH(FEET) = 200.00 CURB HEIGHT(INCHES) = 6.0

STREET HALFWIDTH(FEET) = 30.00

DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 25.00

INSIDE STREET CROSSFALL(DECIMAL) = 0.020

OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020

SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1

Page 21

PCPD10

STREET PARKWAY CROSSFALL(DECIMAL) = 0.020

Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150

Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200

**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 2.22

STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:

STREET FLOW DEPTH(FEET) = 0.35

HALFSTREET FLOOD WIDTH(FEET) = 11.01

AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.67

PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.58

STREET FLOW TRAVEL TIME(MIN.) = 2.00 Tc(MIN.) = 10.93

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.593

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.38 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 0.38 SUBAREA RUNOFF(CFS) = 0.87

EFFECTIVE AREA(ACRES) = 1.07 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 1.1 PEAK FLOW RATE(CFS) = 2.46

END OF SUBAREA STREET FLOW HYDRAULICS:

DEPTH(FEET) = 0.36 HALFSTREET FLOOD WIDTH(FEET) = 11.49

FLOW VELOCITY(FEET/SEC.) = 1.71 DEPTH*VELOCITY(FT*FT/SEC.) = 0.61

LONGEST FLOWPATH FROM NODE 70.00 TO NODE 72.00 = 480.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 72.00 TO NODE 73.00 IS CODE = 61

----------------------------------------------------------------------------

>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>(STANDARD CURB SECTION USED)<<<<<

============================================================================

UPSTREAM ELEVATION(FEET) = 239.90 DOWNSTREAM ELEVATION(FEET) = 239.10

STREET LENGTH(FEET) = 175.00 CURB HEIGHT(INCHES) = 6.0

STREET HALFWIDTH(FEET) = 30.00

DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 25.00

INSIDE STREET CROSSFALL(DECIMAL) = 0.020

OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020

SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1

STREET PARKWAY CROSSFALL(DECIMAL) = 0.020

Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150

Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200

**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 2.78

STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:

STREET FLOW DEPTH(FEET) = 0.37

HALFSTREET FLOOD WIDTH(FEET) = 12.28

AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.71

PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.63

Page 22

PCPD10

STREET FLOW TRAVEL TIME(MIN.) = 1.71 Tc(MIN.) = 12.64

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.386

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.30 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 0.30 SUBAREA RUNOFF(CFS) = 0.63

EFFECTIVE AREA(ACRES) = 1.37 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 1.4 PEAK FLOW RATE(CFS) = 2.89

END OF SUBAREA STREET FLOW HYDRAULICS:

DEPTH(FEET) = 0.38 HALFSTREET FLOOD WIDTH(FEET) = 12.47

FLOW VELOCITY(FEET/SEC.) = 1.73 DEPTH*VELOCITY(FT*FT/SEC.) = 0.65

LONGEST FLOWPATH FROM NODE 70.00 TO NODE 73.00 = 655.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 74.00 TO NODE 75.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 230.00

ELEVATION DATA: UPSTREAM(FEET) = 242.10 DOWNSTREAM(FEET) = 240.90

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.657

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.180

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.64 0.40 0.100 32 7.66

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 1.81

TOTAL AREA(ACRES) = 0.64 PEAK FLOW RATE(CFS) = 1.81

****************************************************************************

FLOW PROCESS FROM NODE 76.00 TO NODE 77.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 230.00

ELEVATION DATA: UPSTREAM(FEET) = 242.50 DOWNSTREAM(FEET) = 241.20

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.536

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.209

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

Page 23

PCPD10

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.51 0.40 0.100 32 7.54

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 1.45

TOTAL AREA(ACRES) = 0.51 PEAK FLOW RATE(CFS) = 1.45

****************************************************************************

FLOW PROCESS FROM NODE 78.00 TO NODE 79.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 200.00

ELEVATION DATA: UPSTREAM(FEET) = 242.50 DOWNSTREAM(FEET) = 240.50

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.357

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.538

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 1.12 0.40 0.100 32 6.36

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 3.53

TOTAL AREA(ACRES) = 1.12 PEAK FLOW RATE(CFS) = 3.53

****************************************************************************

FLOW PROCESS FROM NODE 80.00 TO NODE 81.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 160.00

ELEVATION DATA: UPSTREAM(FEET) = 242.40 DOWNSTREAM(FEET) = 240.90

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 5.890

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.696

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.87 0.40 0.100 32 5.89

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 2.86

TOTAL AREA(ACRES) = 0.87 PEAK FLOW RATE(CFS) = 2.86

****************************************************************************

FLOW PROCESS FROM NODE 80.00 TO NODE 82.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

Page 24

PCPD10

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 150.00

ELEVATION DATA: UPSTREAM(FEET) = 242.40 DOWNSTREAM(FEET) = 241.30

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.029

* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.647

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.27 0.40 0.100 32 6.03

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 0.88

TOTAL AREA(ACRES) = 0.27 PEAK FLOW RATE(CFS) = 0.88

============================================================================

END OF STUDY SUMMARY:

TOTAL AREA(ACRES) = 0.3 TC(MIN.) = 6.03

EFFECTIVE AREA(ACRES) = 0.27 AREA-AVERAGED Fm(INCH/HR)= 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.100

PEAK FLOW RATE(CFS) = 0.88

============================================================================

============================================================================

END OF RATIONAL METHOD ANALYSIS

�

Page 25

HYDROLOGY REPORT August 2017

Pacific Center City of Anaheim, CA

APPENDIX 3.1

25-Year Hydrology Study, Proposed Condition

PCPD25

____________________________________________________________________________

****************************************************************************

RATIONAL METHOD HYDROLOGY COMPUTER PROGRAM PACKAGE

(Reference: 1986 ORANGE COUNTY HYDROLOGY CRITERION)

(c) Copyright 1983-2014 Advanced Engineering Software (aes)

Ver. 21.0 Release Date: 06/01/2014 License ID 1355

Analysis prepared by:

Fuscoe Engineering

16795 Von Karman Ave

Suite 100

Irvine CA, 92606

************************** DESCRIPTION OF STUDY **************************

* PACIFIC CENTER - ANAHEIM *

* PROPOSED HYDROLOGY *

* 25 YEAR EVENT *

**************************************************************************

FILE NAME: PCPD25.DAT

TIME/DATE OF STUDY: 13:37 07/31/2017

============================================================================

USER SPECIFIED HYDROLOGY AND HYDRAULIC MODEL INFORMATION:

============================================================================

--*TIME-OF-CONCENTRATION MODEL*--

USER SPECIFIED STORM EVENT(YEAR) = 25.00

SPECIFIED MINIMUM PIPE SIZE(INCH) = 12.00

SPECIFIED PERCENT OF GRADIENTS(DECIMAL) TO USE FOR FRICTION SLOPE = 0.90

*DATA BANK RAINFALL USED*

*ANTECEDENT MOISTURE CONDITION (AMC) II ASSUMED FOR RATIONAL METHOD*

*USER-DEFINED STREET-SECTIONS FOR COUPLED PIPEFLOW AND STREETFLOW MODEL*

HALF- CROWN TO STREET-CROSSFALL: CURB GUTTER-GEOMETRIES: MANNING

WIDTH CROSSFALL IN- / OUT-/PARK- HEIGHT WIDTH LIP HIKE FACTOR

NO. (FT) (FT) SIDE / SIDE/ WAY (FT) (FT) (FT) (FT) (n)

=== ===== ========= ================= ====== ===== ====== ===== =======

1 30.0 20.0 0.018/0.018/0.020 0.67 2.00 0.0313 0.167 0.0150

GLOBAL STREET FLOW-DEPTH CONSTRAINTS:

1. Relative Flow-Depth = 0.50 FEET

as (Maximum Allowable Street Flow Depth) - (Top-of-Curb)

2. (Depth)*(Velocity) Constraint = 5.0 (FT*FT/S)

*SIZE PIPE WITH A FLOW CAPACITY GREATER THAN

OR EQUAL TO THE UPSTREAM TRIBUTARY PIPE.*

*USER-SPECIFIED MINIMUM TOPOGRAPHIC SLOPE ADJUSTMENT NOT SELECTED

****************************************************************************

FLOW PROCESS FROM NODE 10.00 TO NODE 11.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

Page 1

PCPD25

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 370.00

ELEVATION DATA: UPSTREAM(FEET) = 243.30 DOWNSTREAM(FEET) = 239.00

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.410

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.594

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

APARTMENTS A 0.89 0.40 0.200 32 8.41

PUBLIC PARK A 0.21 0.40 0.850 32 12.54

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.324

SUBAREA RUNOFF(CFS) = 3.43

TOTAL AREA(ACRES) = 1.10 PEAK FLOW RATE(CFS) = 3.43

****************************************************************************

FLOW PROCESS FROM NODE 11.00 TO NODE 11.00 IS CODE = 10

----------------------------------------------------------------------------

>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<<

============================================================================

****************************************************************************

FLOW PROCESS FROM NODE 12.00 TO NODE 13.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 275.00

ELEVATION DATA: UPSTREAM(FEET) = 243.00 DOWNSTREAM(FEET) = 240.10

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.615

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.802

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

APARTMENTS A 0.58 0.40 0.200 32 7.61

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.200

SUBAREA RUNOFF(CFS) = 1.94

TOTAL AREA(ACRES) = 0.58 PEAK FLOW RATE(CFS) = 1.94

****************************************************************************

FLOW PROCESS FROM NODE 13.00 TO NODE 13.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 7.61

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.802

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

Page 2

PCPD25

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

APARTMENTS A 0.37 0.40 0.200 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.200

SUBAREA AREA(ACRES) = 0.37 SUBAREA RUNOFF(CFS) = 1.24

EFFECTIVE AREA(ACRES) = 0.95 AREA-AVERAGED Fm(INCH/HR) = 0.08

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.20

TOTAL AREA(ACRES) = 0.9 PEAK FLOW RATE(CFS) = 3.18

****************************************************************************

FLOW PROCESS FROM NODE 13.00 TO NODE 14.00 IS CODE = 61

----------------------------------------------------------------------------

>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>(STANDARD CURB SECTION USED)<<<<<

============================================================================

UPSTREAM ELEVATION(FEET) = 240.10 DOWNSTREAM ELEVATION(FEET) = 238.80

STREET LENGTH(FEET) = 150.00 CURB HEIGHT(INCHES) = 6.0

STREET HALFWIDTH(FEET) = 40.00

DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 20.00

INSIDE STREET CROSSFALL(DECIMAL) = 0.020

OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020

SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1

STREET PARKWAY CROSSFALL(DECIMAL) = 0.020

Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150

Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200

**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 3.54

STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:

STREET FLOW DEPTH(FEET) = 0.37

HALFSTREET FLOOD WIDTH(FEET) = 11.94

AVERAGE FLOW VELOCITY(FEET/SEC.) = 2.29

PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.84

STREET FLOW TRAVEL TIME(MIN.) = 1.09 Tc(MIN.) = 8.71

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.524

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

APARTMENTS A 0.23 0.40 0.200 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.200

SUBAREA AREA(ACRES) = 0.23 SUBAREA RUNOFF(CFS) = 0.71

EFFECTIVE AREA(ACRES) = 1.18 AREA-AVERAGED Fm(INCH/HR) = 0.08

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.20

TOTAL AREA(ACRES) = 1.2 PEAK FLOW RATE(CFS) = 3.66

END OF SUBAREA STREET FLOW HYDRAULICS:

DEPTH(FEET) = 0.37 HALFSTREET FLOOD WIDTH(FEET) = 12.09

FLOW VELOCITY(FEET/SEC.) = 2.32 DEPTH*VELOCITY(FT*FT/SEC.) = 0.85

LONGEST FLOWPATH FROM NODE 12.00 TO NODE 14.00 = 425.00 FEET.

****************************************************************************

Page 3

PCPD25

FLOW PROCESS FROM NODE 14.00 TO NODE 11.10 IS CODE = 61

----------------------------------------------------------------------------

>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>(STANDARD CURB SECTION USED)<<<<<

============================================================================

UPSTREAM ELEVATION(FEET) = 238.80 DOWNSTREAM ELEVATION(FEET) = 238.50

STREET LENGTH(FEET) = 90.00 CURB HEIGHT(INCHES) = 8.0

STREET HALFWIDTH(FEET) = 84.00

DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 30.00

INSIDE STREET CROSSFALL(DECIMAL) = 0.020

OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020

SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1

STREET PARKWAY CROSSFALL(DECIMAL) = 0.020

Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150

Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200

**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 3.67

STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:

STREET FLOW DEPTH(FEET) = 0.45

HALFSTREET FLOOD WIDTH(FEET) = 14.37

AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.63

PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.73

STREET FLOW TRAVEL TIME(MIN.) = 0.92 Tc(MIN.) = 9.63

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.329

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.01 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 0.01 SUBAREA RUNOFF(CFS) = 0.03

EFFECTIVE AREA(ACRES) = 1.19 AREA-AVERAGED Fm(INCH/HR) = 0.08

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.20

TOTAL AREA(ACRES) = 1.2 PEAK FLOW RATE(CFS) = 3.66

NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE

END OF SUBAREA STREET FLOW HYDRAULICS:

DEPTH(FEET) = 0.45 HALFSTREET FLOOD WIDTH(FEET) = 14.37

FLOW VELOCITY(FEET/SEC.) = 1.62 DEPTH*VELOCITY(FT*FT/SEC.) = 0.72

LONGEST FLOWPATH FROM NODE 12.00 TO NODE 11.10 = 515.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 11.10 TO NODE 11.10 IS CODE = 11

----------------------------------------------------------------------------

>>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<<

============================================================================

** MAIN STREAM CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 3.66 9.63 3.329 0.40( 0.08) 0.20 1.2 12.00

Page 4

PCPD25

LONGEST FLOWPATH FROM NODE 12.00 TO NODE 11.10 = 515.00 FEET.

** MEMORY BANK # 1 CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 3.43 8.41 3.594 0.40( 0.13) 0.32 1.1 10.00

LONGEST FLOWPATH FROM NODE 10.00 TO NODE 11.10 = 370.00 FEET.

** PEAK FLOW RATE TABLE **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 6.89 8.41 3.594 0.40( 0.11) 0.26 2.1 10.00

2 6.83 9.63 3.329 0.40( 0.10) 0.26 2.3 12.00

TOTAL AREA(ACRES) = 2.3

COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:

PEAK FLOW RATE(CFS) = 6.89 Tc(MIN.) = 8.410

EFFECTIVE AREA(ACRES) = 2.14 AREA-AVERAGED Fm(INCH/HR) = 0.11

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.26

TOTAL AREA(ACRES) = 2.3

LONGEST FLOWPATH FROM NODE 12.00 TO NODE 11.10 = 515.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 11.10 TO NODE 11.10 IS CODE = 12

----------------------------------------------------------------------------

>>>>>CLEAR MEMORY BANK # 1 <<<<<

============================================================================

****************************************************************************

FLOW PROCESS FROM NODE 20.00 TO NODE 21.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 320.00

ELEVATION DATA: UPSTREAM(FEET) = 242.90 DOWNSTREAM(FEET) = 238.10

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.540

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.823

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

APARTMENTS A 0.86 0.40 0.200 32 7.54

PUBLIC PARK A 0.38 0.40 0.850 32 11.24

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.399

SUBAREA RUNOFF(CFS) = 4.09

TOTAL AREA(ACRES) = 1.24 PEAK FLOW RATE(CFS) = 4.09

****************************************************************************

FLOW PROCESS FROM NODE 21.00 TO NODE 22.00 IS CODE = 56

----------------------------------------------------------------------------

Page 5

PCPD25

>>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<

>>>>>TRAVELTIME THRU SUBAREA<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 238.10 DOWNSTREAM(FEET) = 237.50

CHANNEL LENGTH THRU SUBAREA(FEET) = 150.00 CHANNEL SLOPE = 0.0040

GIVEN CHANNEL BASE(FEET) = 4.00 CHANNEL FREEBOARD(FEET) = 1.0

"Z" FACTOR = 0.000 MANNING'S FACTOR = 0.015

*ESTIMATED CHANNEL HEIGHT(FEET) = 1.39

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.600

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.20 0.40 0.100 32

PUBLIC PARK A 0.16 0.40 0.850 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.433

TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 4.64

TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 2.96

AVERAGE FLOW DEPTH(FEET) = 0.39 TRAVEL TIME(MIN.) = 0.84

Tc(MIN.) = 8.38

SUBAREA AREA(ACRES) = 0.36 SUBAREA RUNOFF(CFS) = 1.11

EFFECTIVE AREA(ACRES) = 1.60 AREA-AVERAGED Fm(INCH/HR) = 0.16

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.41

TOTAL AREA(ACRES) = 1.6 PEAK FLOW RATE(CFS) = 4.95

GIVEN CHANNEL BASE(FEET) = 4.00 CHANNEL FREEBOARD(FEET) = 1.0

"Z" FACTOR = 0.000 MANNING'S FACTOR = 0.015

*ESTIMATED CHANNEL HEIGHT(FEET) = 1.41

END OF SUBAREA CHANNEL FLOW HYDRAULICS:

DEPTH(FEET) = 0.41 FLOW VELOCITY(FEET/SEC.) = 3.04

LONGEST FLOWPATH FROM NODE 20.00 TO NODE 22.00 = 470.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 22.00 TO NODE 22.00 IS CODE = 10

----------------------------------------------------------------------------

>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<<

============================================================================

****************************************************************************

FLOW PROCESS FROM NODE 30.00 TO NODE 31.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 380.00

ELEVATION DATA: UPSTREAM(FEET) = 243.00 DOWNSTREAM(FEET) = 239.10

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.176

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.652

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

Page 6

PCPD25

COMMERCIAL A 1.66 0.40 0.100 32 8.18

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 5.40

TOTAL AREA(ACRES) = 1.66 PEAK FLOW RATE(CFS) = 5.40

****************************************************************************

FLOW PROCESS FROM NODE 31.00 TO NODE 22.00 IS CODE = 91

----------------------------------------------------------------------------

>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<

============================================================================

UPSTREAM NODE ELEVATION(FEET) = 239.10

DOWNSTREAM NODE ELEVATION(FEET) = 237.50

CHANNEL LENGTH THRU SUBAREA(FEET) = 360.00

"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080

PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150

PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000

MAXIMUM DEPTH(FEET) = 1.00

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.051

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 1.91 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 7.99

TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 1.96

AVERAGE FLOW DEPTH(FEET) = 0.36 FLOOD WIDTH(FEET) = 27.94

"V" GUTTER FLOW TRAVEL TIME(MIN.) = 3.06 Tc(MIN.) = 11.23

SUBAREA AREA(ACRES) = 1.91 SUBAREA RUNOFF(CFS) = 5.18

EFFECTIVE AREA(ACRES) = 3.57 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 3.6 PEAK FLOW RATE(CFS) = 9.67

END OF SUBAREA "V" GUTTER HYDRAULICS:

DEPTH(FEET) = 0.38 FLOOD WIDTH(FEET) = 30.20

FLOW VELOCITY(FEET/SEC.) = 2.05 DEPTH*VELOCITY(FT*FT/SEC) = 0.78

LONGEST FLOWPATH FROM NODE 30.00 TO NODE 22.00 = 740.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 22.00 TO NODE 22.00 IS CODE = 11

----------------------------------------------------------------------------

>>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<<

============================================================================

** MAIN STREAM CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 9.67 11.23 3.051 0.40( 0.04) 0.10 3.6 30.00

LONGEST FLOWPATH FROM NODE 30.00 TO NODE 22.00 = 740.00 FEET.

** MEMORY BANK # 1 CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

Page 7

PCPD25

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 4.95 8.38 3.600 0.40( 0.16) 0.41 1.6 20.00

LONGEST FLOWPATH FROM NODE 20.00 TO NODE 22.00 = 470.00 FEET.

** PEAK FLOW RATE TABLE **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 13.49 8.38 3.600 0.40( 0.09) 0.22 4.3 20.00

2 13.83 11.23 3.051 0.40( 0.08) 0.19 5.2 30.00

TOTAL AREA(ACRES) = 5.2

COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:

PEAK FLOW RATE(CFS) = 13.83 Tc(MIN.) = 11.232

EFFECTIVE AREA(ACRES) = 5.17 AREA-AVERAGED Fm(INCH/HR) = 0.08

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.22

TOTAL AREA(ACRES) = 5.2

LONGEST FLOWPATH FROM NODE 30.00 TO NODE 22.00 = 740.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 22.00 TO NODE 23.00 IS CODE = 51

----------------------------------------------------------------------------

>>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<

>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 237.50 DOWNSTREAM(FEET) = 236.80

CHANNEL LENGTH THRU SUBAREA(FEET) = 70.00 CHANNEL SLOPE = 0.0100

CHANNEL BASE(FEET) = 4.00 "Z" FACTOR = 0.000

MANNING'S FACTOR = 0.015 MAXIMUM DEPTH(FEET) = 1.00

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.021

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

PUBLIC PARK A 0.08 0.40 0.850 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850

TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 13.93

TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 5.88

AVERAGE FLOW DEPTH(FEET) = 0.59 TRAVEL TIME(MIN.) = 0.20

Tc(MIN.) = 11.43

SUBAREA AREA(ACRES) = 0.08 SUBAREA RUNOFF(CFS) = 0.19

EFFECTIVE AREA(ACRES) = 5.25 AREA-AVERAGED Fm(INCH/HR) = 0.08

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.20

TOTAL AREA(ACRES) = 5.2 PEAK FLOW RATE(CFS) = 13.89

END OF SUBAREA CHANNEL FLOW HYDRAULICS:

DEPTH(FEET) = 0.59 FLOW VELOCITY(FEET/SEC.) = 5.88

LONGEST FLOWPATH FROM NODE 30.00 TO NODE 23.00 = 810.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 23.00 TO NODE 23.00 IS CODE = 10

----------------------------------------------------------------------------

>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 2 <<<<<

============================================================================

Page 8

PCPD25

****************************************************************************

FLOW PROCESS FROM NODE 40.00 TO NODE 41.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 300.00

ELEVATION DATA: UPSTREAM(FEET) = 241.50 DOWNSTREAM(FEET) = 240.60

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 9.513

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.352

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.69 0.40 0.100 32 9.51

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 2.06

TOTAL AREA(ACRES) = 0.69 PEAK FLOW RATE(CFS) = 2.06

****************************************************************************

FLOW PROCESS FROM NODE 41.00 TO NODE 42.00 IS CODE = 61

----------------------------------------------------------------------------

>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>(STANDARD CURB SECTION USED)<<<<<

============================================================================

UPSTREAM ELEVATION(FEET) = 240.60 DOWNSTREAM ELEVATION(FEET) = 239.50

STREET LENGTH(FEET) = 300.00 CURB HEIGHT(INCHES) = 6.0

STREET HALFWIDTH(FEET) = 40.00

DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 20.00

INSIDE STREET CROSSFALL(DECIMAL) = 0.020

OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020

SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1

STREET PARKWAY CROSSFALL(DECIMAL) = 0.020

Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150

Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200

**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 2.56

STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:

STREET FLOW DEPTH(FEET) = 0.38

HALFSTREET FLOOD WIDTH(FEET) = 12.45

AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.54

PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.58

STREET FLOW TRAVEL TIME(MIN.) = 3.26 Tc(MIN.) = 12.77

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.837

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.40 0.40 0.100 32

Page 9

PCPD25

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 0.40 SUBAREA RUNOFF(CFS) = 1.01

EFFECTIVE AREA(ACRES) = 1.09 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 1.1 PEAK FLOW RATE(CFS) = 2.74

END OF SUBAREA STREET FLOW HYDRAULICS:

DEPTH(FEET) = 0.38 HALFSTREET FLOOD WIDTH(FEET) = 12.81

FLOW VELOCITY(FEET/SEC.) = 1.56 DEPTH*VELOCITY(FT*FT/SEC.) = 0.60

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 42.00 = 600.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 42.00 TO NODE 42.00 IS CODE = 10

----------------------------------------------------------------------------

>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 3 <<<<<

============================================================================

****************************************************************************

FLOW PROCESS FROM NODE 50.00 TO NODE 45.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 330.00

ELEVATION DATA: UPSTREAM(FEET) = 241.50 DOWNSTREAM(FEET) = 240.20

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 9.358

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.383

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 1.72 0.40 0.100 32 9.36

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 5.17

TOTAL AREA(ACRES) = 1.72 PEAK FLOW RATE(CFS) = 5.17

****************************************************************************

FLOW PROCESS FROM NODE 45.00 TO NODE 42.00 IS CODE = 91

----------------------------------------------------------------------------

>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<

============================================================================

UPSTREAM NODE ELEVATION(FEET) = 240.20

DOWNSTREAM NODE ELEVATION(FEET) = 239.50

CHANNEL LENGTH THRU SUBAREA(FEET) = 160.00

"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080

PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150

PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000

MAXIMUM DEPTH(FEET) = 0.50

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.126

SUBAREA LOSS RATE DATA(AMC II):

Page 10

PCPD25

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 1.15 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 6.78

TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 1.90

AVERAGE FLOW DEPTH(FEET) = 0.34 FLOOD WIDTH(FEET) = 26.08

"V" GUTTER FLOW TRAVEL TIME(MIN.) = 1.40 Tc(MIN.) = 10.76

SUBAREA AREA(ACRES) = 1.15 SUBAREA RUNOFF(CFS) = 3.19

EFFECTIVE AREA(ACRES) = 2.87 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 2.9 PEAK FLOW RATE(CFS) = 7.97

END OF SUBAREA "V" GUTTER HYDRAULICS:

DEPTH(FEET) = 0.36 FLOOD WIDTH(FEET) = 27.91

FLOW VELOCITY(FEET/SEC.) = 1.96 DEPTH*VELOCITY(FT*FT/SEC) = 0.71

LONGEST FLOWPATH FROM NODE 50.00 TO NODE 42.00 = 490.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 42.00 TO NODE 42.00 IS CODE = 11

----------------------------------------------------------------------------

>>>>>CONFLUENCE MEMORY BANK # 3 WITH THE MAIN-STREAM MEMORY<<<<<

============================================================================

** MAIN STREAM CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 7.97 10.76 3.126 0.40( 0.04) 0.10 2.9 50.00

LONGEST FLOWPATH FROM NODE 50.00 TO NODE 42.00 = 490.00 FEET.

** MEMORY BANK # 3 CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 2.74 12.77 2.837 0.40( 0.04) 0.10 1.1 40.00

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 42.00 = 600.00 FEET.

** PEAK FLOW RATE TABLE **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 10.52 10.76 3.126 0.40( 0.04) 0.10 3.8 50.00

2 9.97 12.77 2.837 0.40( 0.04) 0.10 4.0 40.00

TOTAL AREA(ACRES) = 4.0

COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:

PEAK FLOW RATE(CFS) = 10.52 Tc(MIN.) = 10.762

EFFECTIVE AREA(ACRES) = 3.79 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 4.0

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 42.00 = 600.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 42.00 TO NODE 43.00 IS CODE = 91

Page 11

PCPD25

----------------------------------------------------------------------------

>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<

============================================================================

UPSTREAM NODE ELEVATION(FEET) = 239.50

DOWNSTREAM NODE ELEVATION(FEET) = 239.20

CHANNEL LENGTH THRU SUBAREA(FEET) = 50.00

"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080

PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150

PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000

MAXIMUM DEPTH(FEET) = 0.50

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.070

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.40 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 11.07

TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 2.39

AVERAGE FLOW DEPTH(FEET) = 0.38 FLOOD WIDTH(FEET) = 29.89

"V" GUTTER FLOW TRAVEL TIME(MIN.) = 0.35 Tc(MIN.) = 11.11

SUBAREA AREA(ACRES) = 0.40 SUBAREA RUNOFF(CFS) = 1.09

EFFECTIVE AREA(ACRES) = 4.19 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 4.4 PEAK FLOW RATE(CFS) = 11.42

END OF SUBAREA "V" GUTTER HYDRAULICS:

DEPTH(FEET) = 0.38 FLOOD WIDTH(FEET) = 30.35

FLOW VELOCITY(FEET/SEC.) = 2.39 DEPTH*VELOCITY(FT*FT/SEC) = 0.92

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 43.00 = 650.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 43.00 TO NODE 23.00 IS CODE = 41

----------------------------------------------------------------------------

>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 237.20 DOWNSTREAM(FEET) = 236.80

FLOW LENGTH(FEET) = 450.00 MANNING'S N = 0.011

ASSUME FULL-FLOWING PIPELINE

PIPE-FLOW VELOCITY(FEET/SEC.) = 14.54

PIPE FLOW VELOCITY = (TOTAL FLOW)/(PIPE CROSS SECTION AREA)

GIVEN PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1

PIPE-FLOW(CFS) = 11.42

PIPE TRAVEL TIME(MIN.) = 0.52 Tc(MIN.) = 11.63

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 23.00 = 1100.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 23.00 TO NODE 23.00 IS CODE = 11

----------------------------------------------------------------------------

>>>>>CONFLUENCE MEMORY BANK # 2 WITH THE MAIN-STREAM MEMORY<<<<<

============================================================================

Page 12

PCPD25

** MAIN STREAM CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 11.42 11.63 2.992 0.40( 0.04) 0.10 4.2 50.00

2 10.81 13.67 2.730 0.40( 0.04) 0.10 4.4 40.00

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 23.00 = 1100.00 FEET.

** MEMORY BANK # 2 CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 13.54 8.58 3.552 0.40( 0.09) 0.23 4.3 20.00

2 13.89 11.43 3.021 0.40( 0.08) 0.20 5.2 30.00

LONGEST FLOWPATH FROM NODE 30.00 TO NODE 23.00 = 810.00 FEET.

** PEAK FLOW RATE TABLE **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 23.57 8.58 3.552 0.40( 0.07) 0.17 7.4 20.00

2 25.23 11.43 3.021 0.40( 0.06) 0.16 9.4 30.00

3 25.17 11.63 2.992 0.40( 0.06) 0.16 9.4 50.00

4 23.32 13.67 2.730 0.40( 0.06) 0.16 9.6 40.00

TOTAL AREA(ACRES) = 9.6

COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:

PEAK FLOW RATE(CFS) = 25.23 Tc(MIN.) = 11.430

EFFECTIVE AREA(ACRES) = 9.37 AREA-AVERAGED Fm(INCH/HR) = 0.06

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.16

TOTAL AREA(ACRES) = 9.6

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 23.00 = 1100.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 23.00 TO NODE 24.00 IS CODE = 51

----------------------------------------------------------------------------

>>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<

>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 236.80 DOWNSTREAM(FEET) = 235.80

CHANNEL LENGTH THRU SUBAREA(FEET) = 250.00 CHANNEL SLOPE = 0.0040

CHANNEL BASE(FEET) = 7.00 "Z" FACTOR = 0.000

MANNING'S FACTOR = 0.015 MAXIMUM DEPTH(FEET) = 1.50

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.900

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

APARTMENTS A 2.78 0.40 0.200 32

PUBLIC PARK A 0.29 0.40 0.850 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.261

TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 29.09

TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 4.88

AVERAGE FLOW DEPTH(FEET) = 0.85 TRAVEL TIME(MIN.) = 0.85

Tc(MIN.) = 12.28

SUBAREA AREA(ACRES) = 3.07 SUBAREA RUNOFF(CFS) = 7.72

Page 13

PCPD25

EFFECTIVE AREA(ACRES) = 12.44 AREA-AVERAGED Fm(INCH/HR) = 0.07

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.18

TOTAL AREA(ACRES) = 12.7 PEAK FLOW RATE(CFS) = 31.64

END OF SUBAREA CHANNEL FLOW HYDRAULICS:

DEPTH(FEET) = 0.90 FLOW VELOCITY(FEET/SEC.) = 5.01

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 24.00 = 1350.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 24.00 TO NODE 25.00 IS CODE = 51

----------------------------------------------------------------------------

>>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<

>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 235.80 DOWNSTREAM(FEET) = 235.10

CHANNEL LENGTH THRU SUBAREA(FEET) = 135.00 CHANNEL SLOPE = 0.0052

CHANNEL BASE(FEET) = 7.00 "Z" FACTOR = 0.000

MANNING'S FACTOR = 0.015 MAXIMUM DEPTH(FEET) = 1.00

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.847

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

PUBLIC PARK A 0.15 0.40 0.850 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850

TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 31.81

TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 5.48

AVERAGE FLOW DEPTH(FEET) = 0.83 TRAVEL TIME(MIN.) = 0.41

Tc(MIN.) = 12.69

SUBAREA AREA(ACRES) = 0.15 SUBAREA RUNOFF(CFS) = 0.34

EFFECTIVE AREA(ACRES) = 12.59 AREA-AVERAGED Fm(INCH/HR) = 0.08

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.19

TOTAL AREA(ACRES) = 12.8 PEAK FLOW RATE(CFS) = 31.64

NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE

END OF SUBAREA CHANNEL FLOW HYDRAULICS:

DEPTH(FEET) = 0.83 FLOW VELOCITY(FEET/SEC.) = 5.45

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 25.00 = 1485.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 25.00 TO NODE 25.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 12.69

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.847

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 1.53 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 1.53 SUBAREA RUNOFF(CFS) = 3.86

Page 14

PCPD25

EFFECTIVE AREA(ACRES) = 14.12 AREA-AVERAGED Fm(INCH/HR) = 0.07

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.18

TOTAL AREA(ACRES) = 14.4 PEAK FLOW RATE(CFS) = 35.25

****************************************************************************

FLOW PROCESS FROM NODE 25.00 TO NODE 26.00 IS CODE = 52

----------------------------------------------------------------------------

>>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<

>>>>>TRAVELTIME THRU SUBAREA<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 235.10 DOWNSTREAM(FEET) = 234.10

CHANNEL LENGTH THRU SUBAREA(FEET) = 205.00 CHANNEL SLOPE = 0.0049

CHANNEL FLOW THRU SUBAREA(CFS) = 35.25

FLOW VELOCITY(FEET/SEC) = 2.45 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL)

TRAVEL TIME(MIN.) = 1.40 Tc(MIN.) = 14.09

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 26.00 = 1690.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 26.00 TO NODE 26.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 14.09

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.683

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

PUBLIC PARK A 0.29 0.40 0.850 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850

SUBAREA AREA(ACRES) = 0.29 SUBAREA RUNOFF(CFS) = 0.61

EFFECTIVE AREA(ACRES) = 14.41 AREA-AVERAGED Fm(INCH/HR) = 0.08

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.20

TOTAL AREA(ACRES) = 14.6 PEAK FLOW RATE(CFS) = 35.25

NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE

****************************************************************************

FLOW PROCESS FROM NODE 26.00 TO NODE 26.00 IS CODE = 1

----------------------------------------------------------------------------

>>>>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<<<<<

============================================================================

TOTAL NUMBER OF STREAMS = 2

CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE:

TIME OF CONCENTRATION(MIN.) = 14.09

RAINFALL INTENSITY(INCH/HR) = 2.68

AREA-AVERAGED Fm(INCH/HR) = 0.08

AREA-AVERAGED Fp(INCH/HR) = 0.40

AREA-AVERAGED Ap = 0.20

EFFECTIVE STREAM AREA(ACRES) = 14.41

TOTAL STREAM AREA(ACRES) = 14.65

PEAK FLOW RATE(CFS) AT CONFLUENCE = 35.25

****************************************************************************

Page 15

PCPD25

FLOW PROCESS FROM NODE 50.00 TO NODE 51.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 245.00

ELEVATION DATA: UPSTREAM(FEET) = 241.50 DOWNSTREAM(FEET) = 240.50

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.248

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.634

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.88 0.40 0.100 32 8.25

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 2.85

TOTAL AREA(ACRES) = 0.88 PEAK FLOW RATE(CFS) = 2.85

****************************************************************************

FLOW PROCESS FROM NODE 51.00 TO NODE 52.00 IS CODE = 41

----------------------------------------------------------------------------

>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 238.00 DOWNSTREAM(FEET) = 237.50

FLOW LENGTH(FEET) = 125.00 MANNING'S N = 0.011

ASSUME FULL-FLOWING PIPELINE

PIPE-FLOW VELOCITY(FEET/SEC.) = 3.62

PIPE FLOW VELOCITY = (TOTAL FLOW)/(PIPE CROSS SECTION AREA)

GIVEN PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1

PIPE-FLOW(CFS) = 2.85

PIPE TRAVEL TIME(MIN.) = 0.57 Tc(MIN.) = 8.82

LONGEST FLOWPATH FROM NODE 50.00 TO NODE 52.00 = 370.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 52.00 TO NODE 52.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 8.82

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.498

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 1.21 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 1.21 SUBAREA RUNOFF(CFS) = 3.77

EFFECTIVE AREA(ACRES) = 2.09 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 2.1 PEAK FLOW RATE(CFS) = 6.50

Page 16

PCPD25

****************************************************************************

FLOW PROCESS FROM NODE 52.00 TO NODE 53.00 IS CODE = 41

----------------------------------------------------------------------------

>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 237.50 DOWNSTREAM(FEET) = 236.30

FLOW LENGTH(FEET) = 330.00 MANNING'S N = 0.011

ASSUME FULL-FLOWING PIPELINE

PIPE-FLOW VELOCITY(FEET/SEC.) = 8.28

PIPE FLOW VELOCITY = (TOTAL FLOW)/(PIPE CROSS SECTION AREA)

GIVEN PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1

PIPE-FLOW(CFS) = 6.50

PIPE TRAVEL TIME(MIN.) = 0.66 Tc(MIN.) = 9.49

LONGEST FLOWPATH FROM NODE 50.00 TO NODE 53.00 = 700.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 53.00 TO NODE 53.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 9.49

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.357

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 1.63 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 1.63 SUBAREA RUNOFF(CFS) = 4.87

EFFECTIVE AREA(ACRES) = 3.72 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 3.7 PEAK FLOW RATE(CFS) = 11.10

****************************************************************************

FLOW PROCESS FROM NODE 53.00 TO NODE 54.00 IS CODE = 41

----------------------------------------------------------------------------

>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 236.50 DOWNSTREAM(FEET) = 236.30

FLOW LENGTH(FEET) = 30.00 MANNING'S N = 0.011

ASSUME FULL-FLOWING PIPELINE

PIPE-FLOW VELOCITY(FEET/SEC.) = 14.14

PIPE FLOW VELOCITY = (TOTAL FLOW)/(PIPE CROSS SECTION AREA)

GIVEN PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1

PIPE-FLOW(CFS) = 11.10

PIPE TRAVEL TIME(MIN.) = 0.04 Tc(MIN.) = 9.52

LONGEST FLOWPATH FROM NODE 50.00 TO NODE 54.00 = 730.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 54.00 TO NODE 54.00 IS CODE = 81

Page 17

PCPD25

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 9.52

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.350

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.51 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 0.51 SUBAREA RUNOFF(CFS) = 1.52

EFFECTIVE AREA(ACRES) = 4.23 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 4.2 PEAK FLOW RATE(CFS) = 12.60

****************************************************************************

FLOW PROCESS FROM NODE 54.00 TO NODE 55.00 IS CODE = 52

----------------------------------------------------------------------------

>>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<

>>>>>TRAVELTIME THRU SUBAREA<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 236.30 DOWNSTREAM(FEET) = 235.50

CHANNEL LENGTH THRU SUBAREA(FEET) = 160.00 CHANNEL SLOPE = 0.0050

CHANNEL FLOW THRU SUBAREA(CFS) = 12.60

FLOW VELOCITY(FEET/SEC) = 1.88 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL)

TRAVEL TIME(MIN.) = 1.42 Tc(MIN.) = 10.95

LONGEST FLOWPATH FROM NODE 50.00 TO NODE 55.00 = 890.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 55.00 TO NODE 55.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 10.95

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.096

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

PUBLIC PARK A 0.18 0.40 0.850 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850

SUBAREA AREA(ACRES) = 0.18 SUBAREA RUNOFF(CFS) = 0.45

EFFECTIVE AREA(ACRES) = 4.41 AREA-AVERAGED Fm(INCH/HR) = 0.05

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.13

TOTAL AREA(ACRES) = 4.4 PEAK FLOW RATE(CFS) = 12.60

NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE

****************************************************************************

FLOW PROCESS FROM NODE 55.00 TO NODE 55.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

Page 18

PCPD25

MAINLINE Tc(MIN.) = 10.95

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.096

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.31 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 0.31 SUBAREA RUNOFF(CFS) = 0.85

EFFECTIVE AREA(ACRES) = 4.72 AREA-AVERAGED Fm(INCH/HR) = 0.05

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.13

TOTAL AREA(ACRES) = 4.7 PEAK FLOW RATE(CFS) = 12.93

****************************************************************************

FLOW PROCESS FROM NODE 55.00 TO NODE 26.00 IS CODE = 52

----------------------------------------------------------------------------

>>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<

>>>>>TRAVELTIME THRU SUBAREA<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 235.50 DOWNSTREAM(FEET) = 234.10

CHANNEL LENGTH THRU SUBAREA(FEET) = 255.00 CHANNEL SLOPE = 0.0055

CHANNEL FLOW THRU SUBAREA(CFS) = 12.93

FLOW VELOCITY(FEET/SEC) = 1.98 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL)

TRAVEL TIME(MIN.) = 2.15 Tc(MIN.) = 13.09

LONGEST FLOWPATH FROM NODE 50.00 TO NODE 26.00 = 1145.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 26.00 TO NODE 26.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 13.09

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.797

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

PUBLIC PARK A 0.30 0.40 0.850 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850

SUBAREA AREA(ACRES) = 0.30 SUBAREA RUNOFF(CFS) = 0.66

EFFECTIVE AREA(ACRES) = 5.02 AREA-AVERAGED Fm(INCH/HR) = 0.07

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.17

TOTAL AREA(ACRES) = 5.0 PEAK FLOW RATE(CFS) = 12.93

NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE

****************************************************************************

FLOW PROCESS FROM NODE 26.00 TO NODE 26.00 IS CODE = 1

----------------------------------------------------------------------------

>>>>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<<<<<

>>>>>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES<<<<<

============================================================================

TOTAL NUMBER OF STREAMS = 2

CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE:

Page 19

PCPD25

TIME OF CONCENTRATION(MIN.) = 13.09

RAINFALL INTENSITY(INCH/HR) = 2.80

AREA-AVERAGED Fm(INCH/HR) = 0.07

AREA-AVERAGED Fp(INCH/HR) = 0.40

AREA-AVERAGED Ap = 0.17

EFFECTIVE STREAM AREA(ACRES) = 5.02

TOTAL STREAM AREA(ACRES) = 5.02

PEAK FLOW RATE(CFS) AT CONFLUENCE = 12.93

** CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 35.16 11.26 3.046 0.40( 0.08) 0.21 12.5 20.00

1 35.25 14.09 2.683 0.40( 0.08) 0.20 14.4 30.00

1 35.10 14.29 2.662 0.40( 0.08) 0.20 14.5 50.00

1 32.58 16.40 2.463 0.40( 0.08) 0.19 14.6 40.00

2 12.93 13.09 2.797 0.40( 0.07) 0.17 5.0 50.00

RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO

CONFLUENCE FORMULA USED FOR 2 STREAMS.

** PEAK FLOW RATE TABLE **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 47.30 11.26 3.046 0.40( 0.08) 0.20 16.8 20.00

2 48.15 13.09 2.797 0.40( 0.08) 0.19 18.7 50.00

3 47.64 14.09 2.683 0.40( 0.08) 0.19 19.4 30.00

4 47.40 14.29 2.662 0.40( 0.08) 0.19 19.5 50.00

5 43.92 16.40 2.463 0.40( 0.08) 0.19 19.7 40.00

COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:

PEAK FLOW RATE(CFS) = 48.15 Tc(MIN.) = 13.09

EFFECTIVE AREA(ACRES) = 18.75 AREA-AVERAGED Fm(INCH/HR) = 0.08

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.19

TOTAL AREA(ACRES) = 19.7

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 26.00 = 1690.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 26.00 TO NODE 27.00 IS CODE = 41

----------------------------------------------------------------------------

>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 234.10 DOWNSTREAM(FEET) = 233.20

FLOW LENGTH(FEET) = 55.00 MANNING'S N = 0.013

DEPTH OF FLOW IN 24.0 INCH PIPE IS 17.4 INCHES

PIPE-FLOW VELOCITY(FEET/SEC.) = 9.85

GIVEN PIPE DIAMETER(INCH) = 24.00 NUMBER OF PIPES = 2

PIPE-FLOW(CFS) = 48.15

PIPE TRAVEL TIME(MIN.) = 0.09 Tc(MIN.) = 13.19

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 27.00 = 1745.00 FEET.

****************************************************************************

Page 20

PCPD25

FLOW PROCESS FROM NODE 27.00 TO NODE 27.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 13.19

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.786

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

PUBLIC PARK A 0.51 0.40 0.850 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850

SUBAREA AREA(ACRES) = 0.51 SUBAREA RUNOFF(CFS) = 1.12

EFFECTIVE AREA(ACRES) = 19.26 AREA-AVERAGED Fm(INCH/HR) = 0.08

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.21

TOTAL AREA(ACRES) = 20.2 PEAK FLOW RATE(CFS) = 48.15

NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE

****************************************************************************

FLOW PROCESS FROM NODE 70.00 TO NODE 71.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 280.00

ELEVATION DATA: UPSTREAM(FEET) = 241.90 DOWNSTREAM(FEET) = 240.90

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.937

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.472

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.69 0.40 0.100 32 8.94

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 2.13

TOTAL AREA(ACRES) = 0.69 PEAK FLOW RATE(CFS) = 2.13

****************************************************************************

FLOW PROCESS FROM NODE 71.00 TO NODE 72.00 IS CODE = 61

----------------------------------------------------------------------------

>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>(STANDARD CURB SECTION USED)<<<<<

============================================================================

UPSTREAM ELEVATION(FEET) = 240.90 DOWNSTREAM ELEVATION(FEET) = 239.90

STREET LENGTH(FEET) = 200.00 CURB HEIGHT(INCHES) = 6.0

STREET HALFWIDTH(FEET) = 30.00

DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 25.00

INSIDE STREET CROSSFALL(DECIMAL) = 0.020

OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020

Page 21

PCPD25

SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1

STREET PARKWAY CROSSFALL(DECIMAL) = 0.020

Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150

Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200

**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 2.66

STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:

STREET FLOW DEPTH(FEET) = 0.36

HALFSTREET FLOOD WIDTH(FEET) = 11.88

AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.74

PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.63

STREET FLOW TRAVEL TIME(MIN.) = 1.92 Tc(MIN.) = 10.86

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.110

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.38 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 0.38 SUBAREA RUNOFF(CFS) = 1.05

EFFECTIVE AREA(ACRES) = 1.07 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 1.1 PEAK FLOW RATE(CFS) = 2.96

END OF SUBAREA STREET FLOW HYDRAULICS:

DEPTH(FEET) = 0.37 HALFSTREET FLOOD WIDTH(FEET) = 12.37

FLOW VELOCITY(FEET/SEC.) = 1.79 DEPTH*VELOCITY(FT*FT/SEC.) = 0.67

LONGEST FLOWPATH FROM NODE 70.00 TO NODE 72.00 = 480.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 72.00 TO NODE 73.00 IS CODE = 61

----------------------------------------------------------------------------

>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>(STANDARD CURB SECTION USED)<<<<<

============================================================================

UPSTREAM ELEVATION(FEET) = 239.90 DOWNSTREAM ELEVATION(FEET) = 239.10

STREET LENGTH(FEET) = 175.00 CURB HEIGHT(INCHES) = 6.0

STREET HALFWIDTH(FEET) = 30.00

DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 25.00

INSIDE STREET CROSSFALL(DECIMAL) = 0.020

OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020

SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1

STREET PARKWAY CROSSFALL(DECIMAL) = 0.020

Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150

Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200

**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 3.34

STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:

STREET FLOW DEPTH(FEET) = 0.39

HALFSTREET FLOOD WIDTH(FEET) = 13.25

AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.78

Page 22

PCPD25

PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.70

STREET FLOW TRAVEL TIME(MIN.) = 1.64 Tc(MIN.) = 12.49

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.873

SUBAREA LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.30 0.40 0.100 32

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 0.30 SUBAREA RUNOFF(CFS) = 0.76

EFFECTIVE AREA(ACRES) = 1.37 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 1.4 PEAK FLOW RATE(CFS) = 3.49

END OF SUBAREA STREET FLOW HYDRAULICS:

DEPTH(FEET) = 0.40 HALFSTREET FLOOD WIDTH(FEET) = 13.54

FLOW VELOCITY(FEET/SEC.) = 1.79 DEPTH*VELOCITY(FT*FT/SEC.) = 0.71

LONGEST FLOWPATH FROM NODE 70.00 TO NODE 73.00 = 655.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 74.00 TO NODE 75.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 230.00

ELEVATION DATA: UPSTREAM(FEET) = 242.10 DOWNSTREAM(FEET) = 240.90

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.657

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.790

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.64 0.40 0.100 32 7.66

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 2.16

TOTAL AREA(ACRES) = 0.64 PEAK FLOW RATE(CFS) = 2.16

****************************************************************************

FLOW PROCESS FROM NODE 76.00 TO NODE 77.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 230.00

ELEVATION DATA: UPSTREAM(FEET) = 242.50 DOWNSTREAM(FEET) = 241.20

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.536

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.824

SUBAREA Tc AND LOSS RATE DATA(AMC II):

Page 23

PCPD25

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.51 0.40 0.100 32 7.54

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 1.74

TOTAL AREA(ACRES) = 0.51 PEAK FLOW RATE(CFS) = 1.74

****************************************************************************

FLOW PROCESS FROM NODE 78.00 TO NODE 79.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 200.00

ELEVATION DATA: UPSTREAM(FEET) = 242.50 DOWNSTREAM(FEET) = 240.50

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.357

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 4.211

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 1.12 0.40 0.100 32 6.36

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 4.20

TOTAL AREA(ACRES) = 1.12 PEAK FLOW RATE(CFS) = 4.20

****************************************************************************

FLOW PROCESS FROM NODE 80.00 TO NODE 81.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 160.00

ELEVATION DATA: UPSTREAM(FEET) = 242.40 DOWNSTREAM(FEET) = 240.90

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 5.890

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 4.397

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.87 0.40 0.100 32 5.89

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 3.41

TOTAL AREA(ACRES) = 0.87 PEAK FLOW RATE(CFS) = 3.41

****************************************************************************

FLOW PROCESS FROM NODE 80.00 TO NODE 82.00 IS CODE = 21

----------------------------------------------------------------------------

Page 24

PCPD25

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 150.00

ELEVATION DATA: UPSTREAM(FEET) = 242.40 DOWNSTREAM(FEET) = 241.30

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.029

* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 4.339

SUBAREA Tc AND LOSS RATE DATA(AMC II):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.27 0.40 0.100 32 6.03

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 1.04

TOTAL AREA(ACRES) = 0.27 PEAK FLOW RATE(CFS) = 1.04

============================================================================

END OF STUDY SUMMARY:

TOTAL AREA(ACRES) = 0.3 TC(MIN.) = 6.03

EFFECTIVE AREA(ACRES) = 0.27 AREA-AVERAGED Fm(INCH/HR)= 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.100

PEAK FLOW RATE(CFS) = 1.04

============================================================================

============================================================================

END OF RATIONAL METHOD ANALYSIS

�

Page 25

HYDROLOGY REPORT August 2017

Pacific Center City of Anaheim, CA

APPENDIX 3.2

100-Year Hydrology Study, Proposed Condition

PCPD100

____________________________________________________________________________

****************************************************************************

RATIONAL METHOD HYDROLOGY COMPUTER PROGRAM PACKAGE

(Reference: 1986 ORANGE COUNTY HYDROLOGY CRITERION)

(c) Copyright 1983-2014 Advanced Engineering Software (aes)

Ver. 21.0 Release Date: 06/01/2014 License ID 1355

Analysis prepared by:

Fuscoe Engineering

16795 Von Karman Ave

Suite 100

Irvine CA, 92606

************************** DESCRIPTION OF STUDY **************************

* PACIFIC CENTER - ANAHEIM *

* PROPOSED HYDROLOGY *

* 100 YEAR EVENT *

**************************************************************************

FILE NAME: PCPD100.DAT

TIME/DATE OF STUDY: 13:57 07/31/2017

============================================================================

USER SPECIFIED HYDROLOGY AND HYDRAULIC MODEL INFORMATION:

============================================================================

--*TIME-OF-CONCENTRATION MODEL*--

USER SPECIFIED STORM EVENT(YEAR) = 100.00

SPECIFIED MINIMUM PIPE SIZE(INCH) = 12.00

SPECIFIED PERCENT OF GRADIENTS(DECIMAL) TO USE FOR FRICTION SLOPE = 0.90

*DATA BANK RAINFALL USED*

*ANTECEDENT MOISTURE CONDITION (AMC) III ASSUMED FOR RATIONAL METHOD*

*USER-DEFINED STREET-SECTIONS FOR COUPLED PIPEFLOW AND STREETFLOW MODEL*

HALF- CROWN TO STREET-CROSSFALL: CURB GUTTER-GEOMETRIES: MANNING

WIDTH CROSSFALL IN- / OUT-/PARK- HEIGHT WIDTH LIP HIKE FACTOR

NO. (FT) (FT) SIDE / SIDE/ WAY (FT) (FT) (FT) (FT) (n)

=== ===== ========= ================= ====== ===== ====== ===== =======

1 30.0 20.0 0.018/0.018/0.020 0.67 2.00 0.0313 0.167 0.0150

GLOBAL STREET FLOW-DEPTH CONSTRAINTS:

1. Relative Flow-Depth = 0.50 FEET

as (Maximum Allowable Street Flow Depth) - (Top-of-Curb)

2. (Depth)*(Velocity) Constraint = 5.0 (FT*FT/S)

*SIZE PIPE WITH A FLOW CAPACITY GREATER THAN

OR EQUAL TO THE UPSTREAM TRIBUTARY PIPE.*

*USER-SPECIFIED MINIMUM TOPOGRAPHIC SLOPE ADJUSTMENT NOT SELECTED

****************************************************************************

FLOW PROCESS FROM NODE 10.00 TO NODE 11.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

Page 1

PCPD100

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 370.00

ELEVATION DATA: UPSTREAM(FEET) = 243.30 DOWNSTREAM(FEET) = 239.00

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.410

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.593

SUBAREA Tc AND LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

APARTMENTS A 0.89 0.40 0.200 52 8.41

PUBLIC PARK A 0.21 0.40 0.850 52 12.54

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.324

SUBAREA RUNOFF(CFS) = 4.42

TOTAL AREA(ACRES) = 1.10 PEAK FLOW RATE(CFS) = 4.42

****************************************************************************

FLOW PROCESS FROM NODE 11.00 TO NODE 11.00 IS CODE = 10

----------------------------------------------------------------------------

>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<<

============================================================================

****************************************************************************

FLOW PROCESS FROM NODE 12.00 TO NODE 13.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 275.00

ELEVATION DATA: UPSTREAM(FEET) = 243.00 DOWNSTREAM(FEET) = 240.10

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.615

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.862

SUBAREA Tc AND LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

APARTMENTS A 0.58 0.40 0.200 52 7.61

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.200

SUBAREA RUNOFF(CFS) = 2.50

TOTAL AREA(ACRES) = 0.58 PEAK FLOW RATE(CFS) = 2.50

****************************************************************************

FLOW PROCESS FROM NODE 13.00 TO NODE 13.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 7.61

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.862

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

Page 2

PCPD100

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

APARTMENTS A 0.37 0.40 0.200 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.200

SUBAREA AREA(ACRES) = 0.37 SUBAREA RUNOFF(CFS) = 1.59

EFFECTIVE AREA(ACRES) = 0.95 AREA-AVERAGED Fm(INCH/HR) = 0.08

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.20

TOTAL AREA(ACRES) = 0.9 PEAK FLOW RATE(CFS) = 4.09

****************************************************************************

FLOW PROCESS FROM NODE 13.00 TO NODE 14.00 IS CODE = 61

----------------------------------------------------------------------------

>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>(STANDARD CURB SECTION USED)<<<<<

============================================================================

UPSTREAM ELEVATION(FEET) = 240.10 DOWNSTREAM ELEVATION(FEET) = 238.80

STREET LENGTH(FEET) = 150.00 CURB HEIGHT(INCHES) = 6.0

STREET HALFWIDTH(FEET) = 40.00

DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 20.00

INSIDE STREET CROSSFALL(DECIMAL) = 0.020

OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020

SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1

STREET PARKWAY CROSSFALL(DECIMAL) = 0.020

Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150

Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200

**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 4.55

STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:

STREET FLOW DEPTH(FEET) = 0.39

HALFSTREET FLOOD WIDTH(FEET) = 13.17

AVERAGE FLOW VELOCITY(FEET/SEC.) = 2.45

PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.96

STREET FLOW TRAVEL TIME(MIN.) = 1.02 Tc(MIN.) = 8.63

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.525

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

APARTMENTS A 0.23 0.40 0.200 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.200

SUBAREA AREA(ACRES) = 0.23 SUBAREA RUNOFF(CFS) = 0.92

EFFECTIVE AREA(ACRES) = 1.18 AREA-AVERAGED Fm(INCH/HR) = 0.08

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.20

TOTAL AREA(ACRES) = 1.2 PEAK FLOW RATE(CFS) = 4.72

END OF SUBAREA STREET FLOW HYDRAULICS:

DEPTH(FEET) = 0.39 HALFSTREET FLOOD WIDTH(FEET) = 13.39

FLOW VELOCITY(FEET/SEC.) = 2.47 DEPTH*VELOCITY(FT*FT/SEC.) = 0.97

LONGEST FLOWPATH FROM NODE 12.00 TO NODE 14.00 = 425.00 FEET.

****************************************************************************

Page 3

PCPD100

FLOW PROCESS FROM NODE 14.00 TO NODE 11.10 IS CODE = 61

----------------------------------------------------------------------------

>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>(STANDARD CURB SECTION USED)<<<<<

============================================================================

UPSTREAM ELEVATION(FEET) = 238.80 DOWNSTREAM ELEVATION(FEET) = 238.50

STREET LENGTH(FEET) = 90.00 CURB HEIGHT(INCHES) = 8.0

STREET HALFWIDTH(FEET) = 84.00

DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 30.00

INSIDE STREET CROSSFALL(DECIMAL) = 0.020

OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020

SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1

STREET PARKWAY CROSSFALL(DECIMAL) = 0.020

Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150

Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200

**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 4.74

STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:

STREET FLOW DEPTH(FEET) = 0.48

HALFSTREET FLOOD WIDTH(FEET) = 15.99

AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.73

PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.82

STREET FLOW TRAVEL TIME(MIN.) = 0.87 Tc(MIN.) = 9.50

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.283

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.01 0.40 0.100 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 0.01 SUBAREA RUNOFF(CFS) = 0.04

EFFECTIVE AREA(ACRES) = 1.19 AREA-AVERAGED Fm(INCH/HR) = 0.08

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.20

TOTAL AREA(ACRES) = 1.2 PEAK FLOW RATE(CFS) = 4.72

NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE

END OF SUBAREA STREET FLOW HYDRAULICS:

DEPTH(FEET) = 0.48 HALFSTREET FLOOD WIDTH(FEET) = 15.94

FLOW VELOCITY(FEET/SEC.) = 1.73 DEPTH*VELOCITY(FT*FT/SEC.) = 0.82

LONGEST FLOWPATH FROM NODE 12.00 TO NODE 11.10 = 515.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 11.10 TO NODE 11.10 IS CODE = 11

----------------------------------------------------------------------------

>>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<<

============================================================================

** MAIN STREAM CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 4.72 9.50 4.283 0.40( 0.08) 0.20 1.2 12.00

Page 4

PCPD100

LONGEST FLOWPATH FROM NODE 12.00 TO NODE 11.10 = 515.00 FEET.

** MEMORY BANK # 1 CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 4.42 8.41 4.593 0.40( 0.13) 0.32 1.1 10.00

LONGEST FLOWPATH FROM NODE 10.00 TO NODE 11.10 = 370.00 FEET.

** PEAK FLOW RATE TABLE **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 8.90 8.41 4.593 0.40( 0.11) 0.26 2.2 10.00

2 8.83 9.50 4.283 0.40( 0.10) 0.26 2.3 12.00

TOTAL AREA(ACRES) = 2.3

COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:

PEAK FLOW RATE(CFS) = 8.90 Tc(MIN.) = 8.410

EFFECTIVE AREA(ACRES) = 2.15 AREA-AVERAGED Fm(INCH/HR) = 0.11

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.26

TOTAL AREA(ACRES) = 2.3

LONGEST FLOWPATH FROM NODE 12.00 TO NODE 11.10 = 515.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 11.10 TO NODE 11.10 IS CODE = 12

----------------------------------------------------------------------------

>>>>>CLEAR MEMORY BANK # 1 <<<<<

============================================================================

****************************************************************************

FLOW PROCESS FROM NODE 20.00 TO NODE 21.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 320.00

ELEVATION DATA: UPSTREAM(FEET) = 242.90 DOWNSTREAM(FEET) = 238.10

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.540

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.890

SUBAREA Tc AND LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

APARTMENTS A 0.86 0.40 0.200 52 7.54

PUBLIC PARK A 0.38 0.40 0.850 52 11.24

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.399

SUBAREA RUNOFF(CFS) = 5.28

TOTAL AREA(ACRES) = 1.24 PEAK FLOW RATE(CFS) = 5.28

****************************************************************************

FLOW PROCESS FROM NODE 21.00 TO NODE 22.00 IS CODE = 56

----------------------------------------------------------------------------

Page 5

PCPD100

>>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<

>>>>>TRAVELTIME THRU SUBAREA<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 238.10 DOWNSTREAM(FEET) = 237.50

CHANNEL LENGTH THRU SUBAREA(FEET) = 150.00 CHANNEL SLOPE = 0.0040

GIVEN CHANNEL BASE(FEET) = 4.00 CHANNEL FREEBOARD(FEET) = 1.0

"Z" FACTOR = 0.000 MANNING'S FACTOR = 0.015

*ESTIMATED CHANNEL HEIGHT(FEET) = 1.46

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.625

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.20 0.40 0.100 52

PUBLIC PARK A 0.16 0.40 0.850 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.433

TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 6.00

TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 3.26

AVERAGE FLOW DEPTH(FEET) = 0.46 TRAVEL TIME(MIN.) = 0.77

Tc(MIN.) = 8.31

SUBAREA AREA(ACRES) = 0.36 SUBAREA RUNOFF(CFS) = 1.44

EFFECTIVE AREA(ACRES) = 1.60 AREA-AVERAGED Fm(INCH/HR) = 0.16

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.41

TOTAL AREA(ACRES) = 1.6 PEAK FLOW RATE(CFS) = 6.43

GIVEN CHANNEL BASE(FEET) = 4.00 CHANNEL FREEBOARD(FEET) = 1.0

"Z" FACTOR = 0.000 MANNING'S FACTOR = 0.015

*ESTIMATED CHANNEL HEIGHT(FEET) = 1.48

END OF SUBAREA CHANNEL FLOW HYDRAULICS:

DEPTH(FEET) = 0.48 FLOW VELOCITY(FEET/SEC.) = 3.32

LONGEST FLOWPATH FROM NODE 20.00 TO NODE 22.00 = 470.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 22.00 TO NODE 22.00 IS CODE = 10

----------------------------------------------------------------------------

>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<<

============================================================================

****************************************************************************

FLOW PROCESS FROM NODE 30.00 TO NODE 31.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 380.00

ELEVATION DATA: UPSTREAM(FEET) = 243.00 DOWNSTREAM(FEET) = 239.10

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.176

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.668

SUBAREA Tc AND LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

Page 6

PCPD100

COMMERCIAL A 1.66 0.40 0.100 52 8.18

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 6.91

TOTAL AREA(ACRES) = 1.66 PEAK FLOW RATE(CFS) = 6.91

****************************************************************************

FLOW PROCESS FROM NODE 31.00 TO NODE 22.00 IS CODE = 91

----------------------------------------------------------------------------

>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<

============================================================================

UPSTREAM NODE ELEVATION(FEET) = 239.10

DOWNSTREAM NODE ELEVATION(FEET) = 237.50

CHANNEL LENGTH THRU SUBAREA(FEET) = 360.00

"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080

PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150

PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000

MAXIMUM DEPTH(FEET) = 1.00

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.925

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 1.91 0.40 0.100 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 10.25

TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 2.08

AVERAGE FLOW DEPTH(FEET) = 0.39 FLOOD WIDTH(FEET) = 30.90

"V" GUTTER FLOW TRAVEL TIME(MIN.) = 2.89 Tc(MIN.) = 11.07

SUBAREA AREA(ACRES) = 1.91 SUBAREA RUNOFF(CFS) = 6.68

EFFECTIVE AREA(ACRES) = 3.57 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 3.6 PEAK FLOW RATE(CFS) = 12.48

END OF SUBAREA "V" GUTTER HYDRAULICS:

DEPTH(FEET) = 0.41 FLOOD WIDTH(FEET) = 33.33

FLOW VELOCITY(FEET/SEC.) = 2.18 DEPTH*VELOCITY(FT*FT/SEC) = 0.90

LONGEST FLOWPATH FROM NODE 30.00 TO NODE 22.00 = 740.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 22.00 TO NODE 22.00 IS CODE = 11

----------------------------------------------------------------------------

>>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<<

============================================================================

** MAIN STREAM CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 12.48 11.07 3.925 0.40( 0.04) 0.10 3.6 30.00

LONGEST FLOWPATH FROM NODE 30.00 TO NODE 22.00 = 740.00 FEET.

** MEMORY BANK # 1 CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

Page 7

PCPD100

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 6.43 8.31 4.625 0.40( 0.16) 0.41 1.6 20.00

LONGEST FLOWPATH FROM NODE 20.00 TO NODE 22.00 = 470.00 FEET.

** PEAK FLOW RATE TABLE **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 17.49 8.31 4.625 0.40( 0.09) 0.21 4.3 20.00

2 17.90 11.07 3.925 0.40( 0.08) 0.19 5.2 30.00

TOTAL AREA(ACRES) = 5.2

COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:

PEAK FLOW RATE(CFS) = 17.90 Tc(MIN.) = 11.066

EFFECTIVE AREA(ACRES) = 5.17 AREA-AVERAGED Fm(INCH/HR) = 0.08

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.21

TOTAL AREA(ACRES) = 5.2

LONGEST FLOWPATH FROM NODE 30.00 TO NODE 22.00 = 740.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 22.00 TO NODE 23.00 IS CODE = 51

----------------------------------------------------------------------------

>>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<

>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 237.50 DOWNSTREAM(FEET) = 236.80

CHANNEL LENGTH THRU SUBAREA(FEET) = 70.00 CHANNEL SLOPE = 0.0100

CHANNEL BASE(FEET) = 4.00 "Z" FACTOR = 0.000

MANNING'S FACTOR = 0.015 MAXIMUM DEPTH(FEET) = 1.00

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.888

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

PUBLIC PARK A 0.08 0.40 0.850 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850

TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 18.03

TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 6.39

AVERAGE FLOW DEPTH(FEET) = 0.70 TRAVEL TIME(MIN.) = 0.18

Tc(MIN.) = 11.25

SUBAREA AREA(ACRES) = 0.08 SUBAREA RUNOFF(CFS) = 0.26

EFFECTIVE AREA(ACRES) = 5.25 AREA-AVERAGED Fm(INCH/HR) = 0.08

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.20

TOTAL AREA(ACRES) = 5.2 PEAK FLOW RATE(CFS) = 17.98

END OF SUBAREA CHANNEL FLOW HYDRAULICS:

DEPTH(FEET) = 0.70 FLOW VELOCITY(FEET/SEC.) = 6.38

LONGEST FLOWPATH FROM NODE 30.00 TO NODE 23.00 = 810.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 23.00 TO NODE 23.00 IS CODE = 10

----------------------------------------------------------------------------

>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 2 <<<<<

============================================================================

Page 8

PCPD100

****************************************************************************

FLOW PROCESS FROM NODE 40.00 TO NODE 41.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 300.00

ELEVATION DATA: UPSTREAM(FEET) = 241.50 DOWNSTREAM(FEET) = 240.60

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 9.513

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.280

SUBAREA Tc AND LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.69 0.40 0.100 52 9.51

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 2.63

TOTAL AREA(ACRES) = 0.69 PEAK FLOW RATE(CFS) = 2.63

****************************************************************************

FLOW PROCESS FROM NODE 41.00 TO NODE 42.00 IS CODE = 61

----------------------------------------------------------------------------

>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>(STANDARD CURB SECTION USED)<<<<<

============================================================================

UPSTREAM ELEVATION(FEET) = 240.60 DOWNSTREAM ELEVATION(FEET) = 239.50

STREET LENGTH(FEET) = 300.00 CURB HEIGHT(INCHES) = 6.0

STREET HALFWIDTH(FEET) = 40.00

DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 20.00

INSIDE STREET CROSSFALL(DECIMAL) = 0.020

OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020

SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1

STREET PARKWAY CROSSFALL(DECIMAL) = 0.020

Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150

Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200

**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 3.28

STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:

STREET FLOW DEPTH(FEET) = 0.40

HALFSTREET FLOOD WIDTH(FEET) = 13.75

AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.63

PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.66

STREET FLOW TRAVEL TIME(MIN.) = 3.06 Tc(MIN.) = 12.57

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.648

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.40 0.40 0.100 52

Page 9

PCPD100

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 0.40 SUBAREA RUNOFF(CFS) = 1.30

EFFECTIVE AREA(ACRES) = 1.09 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 1.1 PEAK FLOW RATE(CFS) = 3.54

END OF SUBAREA STREET FLOW HYDRAULICS:

DEPTH(FEET) = 0.41 HALFSTREET FLOOD WIDTH(FEET) = 14.18

FLOW VELOCITY(FEET/SEC.) = 1.66 DEPTH*VELOCITY(FT*FT/SEC.) = 0.68

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 42.00 = 600.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 42.00 TO NODE 42.00 IS CODE = 10

----------------------------------------------------------------------------

>>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 3 <<<<<

============================================================================

****************************************************************************

FLOW PROCESS FROM NODE 50.00 TO NODE 45.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 330.00

ELEVATION DATA: UPSTREAM(FEET) = 241.50 DOWNSTREAM(FEET) = 240.20

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 9.358

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.320

SUBAREA Tc AND LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 1.72 0.40 0.100 52 9.36

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 6.63

TOTAL AREA(ACRES) = 1.72 PEAK FLOW RATE(CFS) = 6.63

****************************************************************************

FLOW PROCESS FROM NODE 45.00 TO NODE 42.00 IS CODE = 91

----------------------------------------------------------------------------

>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<

============================================================================

UPSTREAM NODE ELEVATION(FEET) = 240.20

DOWNSTREAM NODE ELEVATION(FEET) = 239.50

CHANNEL LENGTH THRU SUBAREA(FEET) = 160.00

"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080

PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150

PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000

MAXIMUM DEPTH(FEET) = 0.50

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.001

SUBAREA LOSS RATE DATA(AMC III):

Page 10

PCPD100

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 1.15 0.40 0.100 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 8.68

TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 1.99

AVERAGE FLOW DEPTH(FEET) = 0.37 FLOOD WIDTH(FEET) = 28.97

"V" GUTTER FLOW TRAVEL TIME(MIN.) = 1.34 Tc(MIN.) = 10.70

SUBAREA AREA(ACRES) = 1.15 SUBAREA RUNOFF(CFS) = 4.10

EFFECTIVE AREA(ACRES) = 2.87 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 2.9 PEAK FLOW RATE(CFS) = 10.23

END OF SUBAREA "V" GUTTER HYDRAULICS:

DEPTH(FEET) = 0.39 FLOOD WIDTH(FEET) = 30.96

FLOW VELOCITY(FEET/SEC.) = 2.06 DEPTH*VELOCITY(FT*FT/SEC) = 0.80

LONGEST FLOWPATH FROM NODE 50.00 TO NODE 42.00 = 490.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 42.00 TO NODE 42.00 IS CODE = 11

----------------------------------------------------------------------------

>>>>>CONFLUENCE MEMORY BANK # 3 WITH THE MAIN-STREAM MEMORY<<<<<

============================================================================

** MAIN STREAM CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 10.23 10.70 4.001 0.40( 0.04) 0.10 2.9 50.00

LONGEST FLOWPATH FROM NODE 50.00 TO NODE 42.00 = 490.00 FEET.

** MEMORY BANK # 3 CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 3.54 12.57 3.648 0.40( 0.04) 0.10 1.1 40.00

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 42.00 = 600.00 FEET.

** PEAK FLOW RATE TABLE **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 13.54 10.70 4.001 0.40( 0.04) 0.10 3.8 50.00

2 12.86 12.57 3.648 0.40( 0.04) 0.10 4.0 40.00

TOTAL AREA(ACRES) = 4.0

COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:

PEAK FLOW RATE(CFS) = 13.54 Tc(MIN.) = 10.698

EFFECTIVE AREA(ACRES) = 3.80 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 4.0

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 42.00 = 600.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 42.00 TO NODE 43.00 IS CODE = 91

Page 11

PCPD100

----------------------------------------------------------------------------

>>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<<

============================================================================

UPSTREAM NODE ELEVATION(FEET) = 239.50

DOWNSTREAM NODE ELEVATION(FEET) = 239.20

CHANNEL LENGTH THRU SUBAREA(FEET) = 50.00

"V" GUTTER WIDTH(FEET) = 3.00 GUTTER HIKE(FEET) = 0.080

PAVEMENT LIP(FEET) = 0.030 MANNING'S N = .0150

PAVEMENT CROSSFALL(DECIMAL NOTATION) = 0.02000

MAXIMUM DEPTH(FEET) = 0.50

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.932

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.40 0.40 0.100 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 14.24

TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 2.53

AVERAGE FLOW DEPTH(FEET) = 0.41 FLOOD WIDTH(FEET) = 33.09

"V" GUTTER FLOW TRAVEL TIME(MIN.) = 0.33 Tc(MIN.) = 11.03

SUBAREA AREA(ACRES) = 0.40 SUBAREA RUNOFF(CFS) = 1.40

EFFECTIVE AREA(ACRES) = 4.20 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 4.4 PEAK FLOW RATE(CFS) = 14.70

END OF SUBAREA "V" GUTTER HYDRAULICS:

DEPTH(FEET) = 0.42 FLOOD WIDTH(FEET) = 33.54

FLOW VELOCITY(FEET/SEC.) = 2.54 DEPTH*VELOCITY(FT*FT/SEC) = 1.05

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 43.00 = 650.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 43.00 TO NODE 23.00 IS CODE = 41

----------------------------------------------------------------------------

>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 237.20 DOWNSTREAM(FEET) = 236.80

FLOW LENGTH(FEET) = 450.00 MANNING'S N = 0.011

ASSUME FULL-FLOWING PIPELINE

PIPE-FLOW VELOCITY(FEET/SEC.) = 18.72

PIPE FLOW VELOCITY = (TOTAL FLOW)/(PIPE CROSS SECTION AREA)

GIVEN PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1

PIPE-FLOW(CFS) = 14.70

PIPE TRAVEL TIME(MIN.) = 0.40 Tc(MIN.) = 11.43

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 23.00 = 1100.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 23.00 TO NODE 23.00 IS CODE = 11

----------------------------------------------------------------------------

>>>>>CONFLUENCE MEMORY BANK # 2 WITH THE MAIN-STREAM MEMORY<<<<<

============================================================================

Page 12

PCPD100

** MAIN STREAM CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 14.70 11.43 3.853 0.40( 0.04) 0.10 4.2 50.00

2 13.94 13.33 3.528 0.40( 0.04) 0.10 4.4 40.00

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 23.00 = 1100.00 FEET.

** MEMORY BANK # 2 CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 17.57 8.49 4.568 0.40( 0.09) 0.23 4.4 20.00

2 17.98 11.25 3.888 0.40( 0.08) 0.20 5.2 30.00

LONGEST FLOWPATH FROM NODE 30.00 TO NODE 23.00 = 810.00 FEET.

** PEAK FLOW RATE TABLE **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 30.54 8.49 4.568 0.40( 0.07) 0.17 7.5 20.00

2 32.59 11.25 3.888 0.40( 0.06) 0.16 9.4 30.00

3 32.52 11.43 3.853 0.40( 0.06) 0.16 9.4 50.00

4 30.22 13.33 3.528 0.40( 0.06) 0.16 9.6 40.00

TOTAL AREA(ACRES) = 9.6

COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:

PEAK FLOW RATE(CFS) = 32.59 Tc(MIN.) = 11.248

EFFECTIVE AREA(ACRES) = 9.38 AREA-AVERAGED Fm(INCH/HR) = 0.06

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.16

TOTAL AREA(ACRES) = 9.6

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 23.00 = 1100.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 23.00 TO NODE 24.00 IS CODE = 51

----------------------------------------------------------------------------

>>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<

>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 236.80 DOWNSTREAM(FEET) = 235.80

CHANNEL LENGTH THRU SUBAREA(FEET) = 250.00 CHANNEL SLOPE = 0.0040

CHANNEL BASE(FEET) = 7.00 "Z" FACTOR = 0.000

MANNING'S FACTOR = 0.015 MAXIMUM DEPTH(FEET) = 1.50

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.741

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

APARTMENTS A 2.78 0.40 0.200 52

PUBLIC PARK A 0.29 0.40 0.850 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.261

TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 37.62

TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 5.32

AVERAGE FLOW DEPTH(FEET) = 1.01 TRAVEL TIME(MIN.) = 0.78

Tc(MIN.) = 12.03

SUBAREA AREA(ACRES) = 3.07 SUBAREA RUNOFF(CFS) = 10.05

Page 13

PCPD100

EFFECTIVE AREA(ACRES) = 12.45 AREA-AVERAGED Fm(INCH/HR) = 0.07

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.18

TOTAL AREA(ACRES) = 12.7 PEAK FLOW RATE(CFS) = 41.10

END OF SUBAREA CHANNEL FLOW HYDRAULICS:

DEPTH(FEET) = 1.07 FLOW VELOCITY(FEET/SEC.) = 5.48

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 24.00 = 1350.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 24.00 TO NODE 25.00 IS CODE = 51

----------------------------------------------------------------------------

>>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<

>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 235.80 DOWNSTREAM(FEET) = 235.10

CHANNEL LENGTH THRU SUBAREA(FEET) = 135.00 CHANNEL SLOPE = 0.0052

CHANNEL BASE(FEET) = 7.00 "Z" FACTOR = 0.000

MANNING'S FACTOR = 0.015 MAXIMUM DEPTH(FEET) = 1.00

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.676

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

PUBLIC PARK A 0.15 0.40 0.850 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850

TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 41.32

TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 5.98

AVERAGE FLOW DEPTH(FEET) = 0.99 TRAVEL TIME(MIN.) = 0.38

Tc(MIN.) = 12.41

SUBAREA AREA(ACRES) = 0.15 SUBAREA RUNOFF(CFS) = 0.45

EFFECTIVE AREA(ACRES) = 12.60 AREA-AVERAGED Fm(INCH/HR) = 0.08

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.19

TOTAL AREA(ACRES) = 12.8 PEAK FLOW RATE(CFS) = 41.10

NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE

END OF SUBAREA CHANNEL FLOW HYDRAULICS:

DEPTH(FEET) = 0.98 FLOW VELOCITY(FEET/SEC.) = 5.98

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 25.00 = 1485.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 25.00 TO NODE 25.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 12.41

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.676

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 1.53 0.40 0.100 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 1.53 SUBAREA RUNOFF(CFS) = 5.01

Page 14

PCPD100

EFFECTIVE AREA(ACRES) = 14.13 AREA-AVERAGED Fm(INCH/HR) = 0.07

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.18

TOTAL AREA(ACRES) = 14.4 PEAK FLOW RATE(CFS) = 45.82

** PEAK FLOW RATE TABLE **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 45.84 9.66 4.243 0.40( 0.08) 0.19 12.2 20.00

2 45.82 12.41 3.676 0.40( 0.07) 0.18 14.1 30.00

3 45.65 12.59 3.645 0.40( 0.07) 0.18 14.2 50.00

4 42.48 14.52 3.359 0.40( 0.07) 0.18 14.4 40.00

NEW PEAK FLOW DATA ARE:

PEAK FLOW RATE(CFS) = 45.84 Tc(MIN.) = 9.66

AREA-AVERAGED Fm(INCH/HR) = 0.08 AREA-AVERAGED Fp(INCH/HR) = 0.40

AREA-AVERAGED Ap = 0.19 EFFECTIVE AREA(ACRES) = 12.23

****************************************************************************

FLOW PROCESS FROM NODE 25.00 TO NODE 26.00 IS CODE = 52

----------------------------------------------------------------------------

>>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<

>>>>>TRAVELTIME THRU SUBAREA<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 235.10 DOWNSTREAM(FEET) = 234.10

CHANNEL LENGTH THRU SUBAREA(FEET) = 205.00 CHANNEL SLOPE = 0.0049

CHANNEL FLOW THRU SUBAREA(CFS) = 45.84

FLOW VELOCITY(FEET/SEC) = 2.64 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL)

TRAVEL TIME(MIN.) = 1.30 Tc(MIN.) = 10.95

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 26.00 = 1690.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 26.00 TO NODE 26.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 10.95

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.948

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

PUBLIC PARK A 0.29 0.40 0.850 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850

SUBAREA AREA(ACRES) = 0.29 SUBAREA RUNOFF(CFS) = 0.94

EFFECTIVE AREA(ACRES) = 12.52 AREA-AVERAGED Fm(INCH/HR) = 0.08

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.21

TOTAL AREA(ACRES) = 14.6 PEAK FLOW RATE(CFS) = 45.84

NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE

****************************************************************************

FLOW PROCESS FROM NODE 26.00 TO NODE 26.00 IS CODE = 1

----------------------------------------------------------------------------

>>>>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<<<<<

============================================================================

Page 15

PCPD100

TOTAL NUMBER OF STREAMS = 2

CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE:

TIME OF CONCENTRATION(MIN.) = 10.95

RAINFALL INTENSITY(INCH/HR) = 3.95

AREA-AVERAGED Fm(INCH/HR) = 0.08

AREA-AVERAGED Fp(INCH/HR) = 0.40

AREA-AVERAGED Ap = 0.21

EFFECTIVE STREAM AREA(ACRES) = 12.52

TOTAL STREAM AREA(ACRES) = 14.65

PEAK FLOW RATE(CFS) AT CONFLUENCE = 45.84

****************************************************************************

FLOW PROCESS FROM NODE 50.00 TO NODE 51.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 245.00

ELEVATION DATA: UPSTREAM(FEET) = 241.50 DOWNSTREAM(FEET) = 240.50

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.248

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.644

SUBAREA Tc AND LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.88 0.40 0.100 52 8.25

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 3.65

TOTAL AREA(ACRES) = 0.88 PEAK FLOW RATE(CFS) = 3.65

****************************************************************************

FLOW PROCESS FROM NODE 51.00 TO NODE 52.00 IS CODE = 41

----------------------------------------------------------------------------

>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 238.00 DOWNSTREAM(FEET) = 237.50

FLOW LENGTH(FEET) = 125.00 MANNING'S N = 0.011

ASSUME FULL-FLOWING PIPELINE

PIPE-FLOW VELOCITY(FEET/SEC.) = 4.64

PIPE FLOW VELOCITY = (TOTAL FLOW)/(PIPE CROSS SECTION AREA)

GIVEN PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1

PIPE-FLOW(CFS) = 3.65

PIPE TRAVEL TIME(MIN.) = 0.45 Tc(MIN.) = 8.70

LONGEST FLOWPATH FROM NODE 50.00 TO NODE 52.00 = 370.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 52.00 TO NODE 52.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

Page 16

PCPD100

MAINLINE Tc(MIN.) = 8.70

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.506

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 1.21 0.40 0.100 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 1.21 SUBAREA RUNOFF(CFS) = 4.86

EFFECTIVE AREA(ACRES) = 2.09 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 2.1 PEAK FLOW RATE(CFS) = 8.40

****************************************************************************

FLOW PROCESS FROM NODE 52.00 TO NODE 53.00 IS CODE = 41

----------------------------------------------------------------------------

>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 237.50 DOWNSTREAM(FEET) = 236.30

FLOW LENGTH(FEET) = 330.00 MANNING'S N = 0.011

ASSUME FULL-FLOWING PIPELINE

PIPE-FLOW VELOCITY(FEET/SEC.) = 10.69

PIPE FLOW VELOCITY = (TOTAL FLOW)/(PIPE CROSS SECTION AREA)

GIVEN PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1

PIPE-FLOW(CFS) = 8.40

PIPE TRAVEL TIME(MIN.) = 0.51 Tc(MIN.) = 9.21

LONGEST FLOWPATH FROM NODE 50.00 TO NODE 53.00 = 700.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 53.00 TO NODE 53.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 9.21

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.360

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 1.63 0.40 0.100 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 1.63 SUBAREA RUNOFF(CFS) = 6.34

EFFECTIVE AREA(ACRES) = 3.72 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 3.7 PEAK FLOW RATE(CFS) = 14.46

****************************************************************************

FLOW PROCESS FROM NODE 53.00 TO NODE 54.00 IS CODE = 41

----------------------------------------------------------------------------

>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<

============================================================================

Page 17

PCPD100

ELEVATION DATA: UPSTREAM(FEET) = 236.50 DOWNSTREAM(FEET) = 236.30

FLOW LENGTH(FEET) = 30.00 MANNING'S N = 0.011

ASSUME FULL-FLOWING PIPELINE

PIPE-FLOW VELOCITY(FEET/SEC.) = 18.41

PIPE FLOW VELOCITY = (TOTAL FLOW)/(PIPE CROSS SECTION AREA)

GIVEN PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1

PIPE-FLOW(CFS) = 14.46

PIPE TRAVEL TIME(MIN.) = 0.03 Tc(MIN.) = 9.24

LONGEST FLOWPATH FROM NODE 50.00 TO NODE 54.00 = 730.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 54.00 TO NODE 54.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 9.24

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.352

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.51 0.40 0.100 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 0.51 SUBAREA RUNOFF(CFS) = 1.98

EFFECTIVE AREA(ACRES) = 4.23 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 4.2 PEAK FLOW RATE(CFS) = 16.42

****************************************************************************

FLOW PROCESS FROM NODE 54.00 TO NODE 55.00 IS CODE = 52

----------------------------------------------------------------------------

>>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<

>>>>>TRAVELTIME THRU SUBAREA<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 236.30 DOWNSTREAM(FEET) = 235.50

CHANNEL LENGTH THRU SUBAREA(FEET) = 160.00 CHANNEL SLOPE = 0.0050

CHANNEL FLOW THRU SUBAREA(CFS) = 16.42

FLOW VELOCITY(FEET/SEC) = 2.01 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL)

TRAVEL TIME(MIN.) = 1.33 Tc(MIN.) = 10.57

LONGEST FLOWPATH FROM NODE 50.00 TO NODE 55.00 = 890.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 55.00 TO NODE 55.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 10.57

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.030

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

PUBLIC PARK A 0.18 0.40 0.850 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

Page 18

PCPD100

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850

SUBAREA AREA(ACRES) = 0.18 SUBAREA RUNOFF(CFS) = 0.60

EFFECTIVE AREA(ACRES) = 4.41 AREA-AVERAGED Fm(INCH/HR) = 0.05

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.13

TOTAL AREA(ACRES) = 4.4 PEAK FLOW RATE(CFS) = 16.42

NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE

****************************************************************************

FLOW PROCESS FROM NODE 55.00 TO NODE 55.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 10.57

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.030

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.31 0.40 0.100 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 0.31 SUBAREA RUNOFF(CFS) = 1.11

EFFECTIVE AREA(ACRES) = 4.72 AREA-AVERAGED Fm(INCH/HR) = 0.05

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.13

TOTAL AREA(ACRES) = 4.7 PEAK FLOW RATE(CFS) = 16.90

****************************************************************************

FLOW PROCESS FROM NODE 55.00 TO NODE 26.00 IS CODE = 52

----------------------------------------------------------------------------

>>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<

>>>>>TRAVELTIME THRU SUBAREA<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 235.50 DOWNSTREAM(FEET) = 234.10

CHANNEL LENGTH THRU SUBAREA(FEET) = 255.00 CHANNEL SLOPE = 0.0055

CHANNEL FLOW THRU SUBAREA(CFS) = 16.90

FLOW VELOCITY(FEET/SEC) = 2.12 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL)

TRAVEL TIME(MIN.) = 2.00 Tc(MIN.) = 12.57

LONGEST FLOWPATH FROM NODE 50.00 TO NODE 26.00 = 1145.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 26.00 TO NODE 26.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 12.57

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.649

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

PUBLIC PARK A 0.30 0.40 0.850 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850

SUBAREA AREA(ACRES) = 0.30 SUBAREA RUNOFF(CFS) = 0.89

EFFECTIVE AREA(ACRES) = 5.02 AREA-AVERAGED Fm(INCH/HR) = 0.07

Page 19

PCPD100

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.17

TOTAL AREA(ACRES) = 5.0 PEAK FLOW RATE(CFS) = 16.90

NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE

****************************************************************************

FLOW PROCESS FROM NODE 26.00 TO NODE 26.00 IS CODE = 1

----------------------------------------------------------------------------

>>>>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<<<<<

>>>>>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES<<<<<

============================================================================

TOTAL NUMBER OF STREAMS = 2

CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE:

TIME OF CONCENTRATION(MIN.) = 12.57

RAINFALL INTENSITY(INCH/HR) = 3.65

AREA-AVERAGED Fm(INCH/HR) = 0.07

AREA-AVERAGED Fp(INCH/HR) = 0.40

AREA-AVERAGED Ap = 0.17

EFFECTIVE STREAM AREA(ACRES) = 5.02

TOTAL STREAM AREA(ACRES) = 5.02

PEAK FLOW RATE(CFS) AT CONFLUENCE = 16.90

** CONFLUENCE DATA **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 45.84 10.95 3.948 0.40( 0.08) 0.21 12.5 20.00

1 45.82 13.70 3.472 0.40( 0.08) 0.20 14.4 30.00

1 45.65 13.89 3.446 0.40( 0.08) 0.20 14.5 50.00

1 42.48 15.84 3.195 0.40( 0.08) 0.19 14.6 40.00

2 16.90 12.57 3.649 0.40( 0.07) 0.17 5.0 50.00

RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO

CONFLUENCE FORMULA USED FOR 2 STREAMS.

** PEAK FLOW RATE TABLE **

STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER

NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE

1 61.80 10.95 3.948 0.40( 0.08) 0.20 16.9 20.00

2 62.73 12.57 3.649 0.40( 0.08) 0.19 18.7 50.00

3 61.89 13.70 3.472 0.40( 0.08) 0.19 19.4 30.00

4 61.59 13.89 3.446 0.40( 0.08) 0.19 19.5 50.00

5 57.24 15.84 3.195 0.40( 0.08) 0.19 19.7 40.00

COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:

PEAK FLOW RATE(CFS) = 62.73 Tc(MIN.) = 12.57

EFFECTIVE AREA(ACRES) = 18.66 AREA-AVERAGED Fm(INCH/HR) = 0.08

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.19

TOTAL AREA(ACRES) = 19.7

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 26.00 = 1690.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 26.00 TO NODE 27.00 IS CODE = 41

----------------------------------------------------------------------------

>>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<

Page 20

PCPD100

>>>>>USING USER-SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<<

============================================================================

ELEVATION DATA: UPSTREAM(FEET) = 234.10 DOWNSTREAM(FEET) = 233.20

FLOW LENGTH(FEET) = 55.00 MANNING'S N = 0.013

ASSUME FULL-FLOWING PIPELINE

PIPE-FLOW VELOCITY(FEET/SEC.) = 9.98

PIPE FLOW VELOCITY = (TOTAL FLOW)/(PIPE CROSS SECTION AREA)

GIVEN PIPE DIAMETER(INCH) = 24.00 NUMBER OF PIPES = 2

PIPE-FLOW(CFS) = 62.73

PIPE TRAVEL TIME(MIN.) = 0.09 Tc(MIN.) = 12.66

LONGEST FLOWPATH FROM NODE 40.00 TO NODE 27.00 = 1745.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 27.00 TO NODE 27.00 IS CODE = 81

----------------------------------------------------------------------------

>>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<

============================================================================

MAINLINE Tc(MIN.) = 12.66

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.633

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

PUBLIC PARK A 0.51 0.40 0.850 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.850

SUBAREA AREA(ACRES) = 0.51 SUBAREA RUNOFF(CFS) = 1.51

EFFECTIVE AREA(ACRES) = 19.17 AREA-AVERAGED Fm(INCH/HR) = 0.08

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.21

TOTAL AREA(ACRES) = 20.2 PEAK FLOW RATE(CFS) = 62.73

NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE

****************************************************************************

FLOW PROCESS FROM NODE 70.00 TO NODE 71.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 280.00

ELEVATION DATA: UPSTREAM(FEET) = 241.90 DOWNSTREAM(FEET) = 240.90

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.937

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.436

SUBAREA Tc AND LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.69 0.40 0.100 52 8.94

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 2.73

TOTAL AREA(ACRES) = 0.69 PEAK FLOW RATE(CFS) = 2.73

****************************************************************************

Page 21

PCPD100

FLOW PROCESS FROM NODE 71.00 TO NODE 72.00 IS CODE = 61

----------------------------------------------------------------------------

>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>(STANDARD CURB SECTION USED)<<<<<

============================================================================

UPSTREAM ELEVATION(FEET) = 240.90 DOWNSTREAM ELEVATION(FEET) = 239.90

STREET LENGTH(FEET) = 200.00 CURB HEIGHT(INCHES) = 6.0

STREET HALFWIDTH(FEET) = 30.00

DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 25.00

INSIDE STREET CROSSFALL(DECIMAL) = 0.020

OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020

SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1

STREET PARKWAY CROSSFALL(DECIMAL) = 0.020

Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150

Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200

**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 3.41

STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:

STREET FLOW DEPTH(FEET) = 0.39

HALFSTREET FLOOD WIDTH(FEET) = 13.15

AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.84

PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.72

STREET FLOW TRAVEL TIME(MIN.) = 1.81 Tc(MIN.) = 10.75

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.991

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.38 0.40 0.100 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 0.38 SUBAREA RUNOFF(CFS) = 1.35

EFFECTIVE AREA(ACRES) = 1.07 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 1.1 PEAK FLOW RATE(CFS) = 3.81

END OF SUBAREA STREET FLOW HYDRAULICS:

DEPTH(FEET) = 0.40 HALFSTREET FLOOD WIDTH(FEET) = 13.74

FLOW VELOCITY(FEET/SEC.) = 1.90 DEPTH*VELOCITY(FT*FT/SEC.) = 0.76

LONGEST FLOWPATH FROM NODE 70.00 TO NODE 72.00 = 480.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 72.00 TO NODE 73.00 IS CODE = 61

----------------------------------------------------------------------------

>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<<

>>>>>(STANDARD CURB SECTION USED)<<<<<

============================================================================

UPSTREAM ELEVATION(FEET) = 239.90 DOWNSTREAM ELEVATION(FEET) = 239.10

STREET LENGTH(FEET) = 175.00 CURB HEIGHT(INCHES) = 6.0

STREET HALFWIDTH(FEET) = 30.00

DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 25.00

Page 22

PCPD100

INSIDE STREET CROSSFALL(DECIMAL) = 0.020

OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020

SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 1

STREET PARKWAY CROSSFALL(DECIMAL) = 0.020

Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0150

Manning's FRICTION FACTOR for Back-of-Walk Flow Section = 0.0200

**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 4.30

STREETFLOW MODEL RESULTS USING ESTIMATED FLOW:

STREET FLOW DEPTH(FEET) = 0.42

HALFSTREET FLOOD WIDTH(FEET) = 14.72

AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.88

PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.79

STREET FLOW TRAVEL TIME(MIN.) = 1.55 Tc(MIN.) = 12.30

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.695

SUBAREA LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN

COMMERCIAL A 0.30 0.40 0.100 52

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA AREA(ACRES) = 0.30 SUBAREA RUNOFF(CFS) = 0.99

EFFECTIVE AREA(ACRES) = 1.37 AREA-AVERAGED Fm(INCH/HR) = 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.10

TOTAL AREA(ACRES) = 1.4 PEAK FLOW RATE(CFS) = 4.51

END OF SUBAREA STREET FLOW HYDRAULICS:

DEPTH(FEET) = 0.42 HALFSTREET FLOOD WIDTH(FEET) = 14.91

FLOW VELOCITY(FEET/SEC.) = 1.92 DEPTH*VELOCITY(FT*FT/SEC.) = 0.82

LONGEST FLOWPATH FROM NODE 70.00 TO NODE 73.00 = 655.00 FEET.

****************************************************************************

FLOW PROCESS FROM NODE 74.00 TO NODE 75.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 230.00

ELEVATION DATA: UPSTREAM(FEET) = 242.10 DOWNSTREAM(FEET) = 240.90

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.657

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.847

SUBAREA Tc AND LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.64 0.40 0.100 52 7.66

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 2.77

TOTAL AREA(ACRES) = 0.64 PEAK FLOW RATE(CFS) = 2.77

Page 23

PCPD100

****************************************************************************

FLOW PROCESS FROM NODE 76.00 TO NODE 77.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 230.00

ELEVATION DATA: UPSTREAM(FEET) = 242.50 DOWNSTREAM(FEET) = 241.20

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.536

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.891

SUBAREA Tc AND LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.51 0.40 0.100 52 7.54

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 2.23

TOTAL AREA(ACRES) = 0.51 PEAK FLOW RATE(CFS) = 2.23

****************************************************************************

FLOW PROCESS FROM NODE 78.00 TO NODE 79.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 200.00

ELEVATION DATA: UPSTREAM(FEET) = 242.50 DOWNSTREAM(FEET) = 240.50

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.357

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 5.392

SUBAREA Tc AND LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 1.12 0.40 0.100 52 6.36

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 5.39

TOTAL AREA(ACRES) = 1.12 PEAK FLOW RATE(CFS) = 5.39

****************************************************************************

FLOW PROCESS FROM NODE 80.00 TO NODE 81.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 160.00

ELEVATION DATA: UPSTREAM(FEET) = 242.40 DOWNSTREAM(FEET) = 240.90

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 5.890

Page 24

PCPD100

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 5.633

SUBAREA Tc AND LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.87 0.40 0.100 52 5.89

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 4.38

TOTAL AREA(ACRES) = 0.87 PEAK FLOW RATE(CFS) = 4.38

****************************************************************************

FLOW PROCESS FROM NODE 80.00 TO NODE 82.00 IS CODE = 21

----------------------------------------------------------------------------

>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<

>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<<

============================================================================

INITIAL SUBAREA FLOW-LENGTH(FEET) = 150.00

ELEVATION DATA: UPSTREAM(FEET) = 242.40 DOWNSTREAM(FEET) = 241.30

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20

SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.029

* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 5.558

SUBAREA Tc AND LOSS RATE DATA(AMC III):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)

COMMERCIAL A 0.27 0.40 0.100 52 6.03

SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40

SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100

SUBAREA RUNOFF(CFS) = 1.34

TOTAL AREA(ACRES) = 0.27 PEAK FLOW RATE(CFS) = 1.34

============================================================================

END OF STUDY SUMMARY:

TOTAL AREA(ACRES) = 0.3 TC(MIN.) = 6.03

EFFECTIVE AREA(ACRES) = 0.27 AREA-AVERAGED Fm(INCH/HR)= 0.04

AREA-AVERAGED Fp(INCH/HR) = 0.40 AREA-AVERAGED Ap = 0.100

PEAK FLOW RATE(CFS) = 1.34

============================================================================

============================================================================

END OF RATIONAL METHOD ANALYSIS

�

Page 25

HYDROLOGY REPORT August 2017

Pacific Center City of Anaheim, CA

APPENDIX 4

Soils Map Excerpt

HYDROLOGY REPORT August 2017

Pacific Center City of Anaheim, CA

APPENDIX 5

Hydrology Maps Existing and Proposed Condition – In Pocket

HYDROLOGY REPORT August 2017

Pacific Center City of Anaheim, CA

APPENDIX 6

FEMA Map

HYDROLOGY REPORT August 2017

Pacific Center City of Anaheim, CA

APPENDIX 7

Basin Impact Analysis