board of managers march 19, 2014 packet

Our Mission is to protect, manage and improve the water resources of Capitol Region Watershed District

Board Workshop and Regular Meeting of the Capitol Region Watershed District (CRWD) Board Of

Managers, for Wednesday, March 19, 2014 5:00 p.m. at the office of the CRWD, 1410 Energy Park Drive,

Suite 4, St. Paul, Minnesota.

BOARD WORKSHOP AGENDA

BOARD WORKSHOP FOR OFFICE PLANNING (5:00 PM)

5:00 PM Workshop Purpose Mark Doneux

5:10 PM Review of Needs Assessment/Program Jason Mundstock/Joe Hughes

5:15 PM Discussion of Office Alternatives Jason Mundstock/Joe Hughes

5:50 PM Workshop Adjourned

REGULAR MEETING AGENDA (6:00 PM)

I. Call to Order of Regular Meeting (President Joe Collins)

A) Attendance

B) Review, Amendments and Approval of the Agenda

II. Public Comment For Items not on the Agenda (Please observe a limit of three minutes per person.)

III. Permit Applications and Program Updates (Permit Process: 1) Staff Review/Recommendation, 2) Applicant Response, 3) Public Comment, and 4)

Board Discussion and Action.)

A) Permit # 13-022 13-027 Vintage on Selby Review Extension Request B) Permit # 14-001 Montana-Greenbrier RSVP C) Permit # 14-005 Hazelden Redevelopment D) Permit # 14-008 Lowertown Ballpark (Recommendation pending review of revisions) E) Permit # 14-009 Waters of Highland F) TAC Update G) Permit Program/Rules Update (Kelley)

IV. Special Reports A) TBI Drainage Improvements at Cottage Ave. and Farrington Street, Anna Eleria B) Stewardship Grant Program Improvements, Nate Zwonitzer

V. Action Items A) AR: Approve Minutes of the February 26, 2014 Board Workshop (Sylvander) B) AR: Approve Minutes of the March 5, 2014 Board Meeting (Sylvander) C) AR: Approve February Accounts Payable & Budget Update (Sylvander) D) AR: Approve Easement and Access Agreements for the Highland Ravine Project (Eleria) E) AR: Authorize Bidding for the Highland Ravine Project (Eleria) F) AR: Approve Contract Amendment with Houston Engineering for Curtiss Pond Improvement

Pond Project (Fossum)

Materials Enclosed

Our Mission is to protect, manage and improve the water resources of Capitol Region Watershed District

VI. Unfinished Business No Unfinished Business

VII. General Information

A) Administrators Report

VIII. Next Meetings

A) Wednesday, April 2, 2014 CAC Meeting Review

IX. Adjournment

W:\04 Board of Managers\Agendas\2014\March 19, 2014 Agenda Regular Mtg.docx

Our Mission is to protect, manage and improve the water resources of Capitol Region Watershed District.

DATE: March 13, 2014 TO: CRWD Board of Managers FROM: Mark Doneux RE: Office Facility Update

Background CBRE has completed the Needs Assessment as well as a review of existing facilities. Issues Staff will review again the basic needs assessment and confirm key or priority needs versus wants. Recent office site visits have helped focus our needs based on currently available properties on the market. Jason Mundstock and Joe Hughes will review the findings of the Market Analysis including a financial analysis of three office facility options. Those options include build, buy and lease. Once this second working session is completed, CBRE will conduct the final Market Analysis and incorporate that analysis into the final Office Needs Survey and Assessment. The goal of the workshop is to pick up where we left off after the January 8th workshop and establish a clear direction regarding the build, buy or lease option and establish an overall budget for the project. Action Requested No action requested. Provide feedback on findings. enc: Updated Market Analysis, CB Richard Ellis W:\01 Administration\Facility Management\2012 Facility Planning\Board Memo Office Facility Update 3-13-14.docx

March 19, 2014 5:00 PM Board Workshop Office Planning (Doneux)

CRWD Build/ Buy/ Lease Assumptions

Build Buy Lease

Manufacturing Square Feet - - - Office Square Feet 10,000.00 10,817.00 10,000.00 SF are equal for analysisRentable Square Feet 10,000.00 10,817.00 10,000.00

Land Cost 653,400 - - $10/ SF cost of land (low side)Purchase Price 1,499,000 Construction Costs 2,860,000 865,360 200,000 Total Costs 3,513,400 2,364,360 200,000 Total Cost/SF 351.34 218.58 20.00 Construction Costs/SF 286.00 80.00 20.00 Lease assumes $40/ SF LL contribution

Operating Expense 8.00 8.00 8.00Taxes 0.00 0.00 3.00Expense Growth 3.00% 3.00% 3.00%Tax Rate Growth 5.00% 5.00% 5.00%

Warehouse Rent Office Rent 12.00 Blended Rate 12.00 Rent Growth 3%

LTV 100% 100%Interest Rate 5.00% 5.00%Term 15.00 15.00 Bond Amount 3,513,400 2,364,360 Equity Required - - Annual Debt Service 338,489 227,788

Sales Costs 8.00% 8.00%Appreciation Rate 2.00% 2.00%Discount Rate 6.00% 6.00% 9.00%Holding Period 10 10 10Buyout Price (90% FMV)

Notes:"Cost" include construction hard & soft costs onlyAll scenarios do not include costs to move, furnish or technology installations ($25 - $30/ SF)

markText BoxW:\01 Administration\Facility Management\2012 Facility Planning\CRWD_Budget_Package_031114

Preliminary Budget_CRWD_buy.xls Page 1 of 5

PROJECT NAME: Capital Region Watershed District - Buy Option DATE:PROJECT LOCATION: St. Paul, MN

PREPARED BY: Jason Mundstock AREA (RSF): 10,817

Trade Description Account Totals Division Totals

02 PROFESSIONAL DESIGN FEES0220 Architect 31,234$ 2.89$ 0230 Landscape Architect -$ -$ 0240 Structural Engineer 11,358$ 1.05$ 0250 MEP Engineer 19,876$ 1.84$ 0270 Communications Consultant 14,197$ 1.31$ 0275 Security Consultant 14,197$ 1.31$ 90,863$ 8.40$ 3.08%

03 CONSULTING AND MISCELLANEOUS FEES0310 Project Management Consultant 56,789$ 5.25$ 0320 Legal -$ -$ 0330 Insurance -$ -$ 56,789$ 5.25$ 1.93%

04 CONSTRUCTION0410 Demolition -$ -$ 0450 Tenant Construction 2,216,708$ 204.93$ 0460 Communications Cabling [in Technology] -$ -$ 2,216,708$ 204.93$ 75.19%

05 FURNITURE, FIXTURES AND EQUIPMENT0510 Furniture 189,000$ 17.47$ 0520 Equipment 14,250$ 1.32$ 0530 Telephone/Data Communications Equip. 32,451$ 3.00$ 0540 Audio / Visual Equipment 40,000$ 3.70$ 0550 Security Equipment 12,500$ 1.16$ 0560 Reproduction Equipment -$ -$ 0570 Food Service Equipment 7,500$ 0.69$ 0580 Artwork -$ -$ 0585 Building and Interior Signage 12,500$ 1.16$ 308,201$ 28.49$ 10.45%

06 RELOCATION COST0610 Furniture Relocation -$ -$ 0620 Move Contractor 7,500$ 0.69$ 7,500$ 0.69$ 0.25%

09 CONTINGENCY0910 Project Contingency 268,006$ 24.78$ 268,006$ 24.78$ 9.09%

TOTAL COST REQUIRING FUNDING 2,948,067$ 272.54$ 2,948,067$ 272.54$ 100.00%

FUNDINGLandlord Funds -$ -$ -$ -$ 0.00%Tenant Funding 2,948,067$ 272.54$ 2,948,067$ 272.54$ 100.00%

2,948,067$ 272.54$ 2,948,067$ 272.54$ 100.00%

Notes & Clarifications:1234

5

Grand Total of Funds

Project Budget Summary Report

March 5, 2014

Construction costs are estimates based on program issued September 2013.

The costs indicated above are based on specific assumptions and should ONLY be utilized as a point of reference in discussions until actual project scope is finalized.

Furniture costs assume new furniture throughoutMove costs assume a "box move only with no relocation of furnitureIT Infrastructure such as Servers, Switches, Routers and Phone System pricing is excluded from this pricing

Preliminary Budget_CRWD_build.xls Page 1 of 6

PROJECT NAME: Capital Region Watershed District - Build Option DATE:PROJECT LOCATION: St. Paul, MN



02 PROFESSIONAL DESIGN FEES0220 Architect 157,500$ 15.75$ 0230 Landscape Architect 105,000$ 10.50$ 0240 Structural Engineer 52,500$ 5.25$ 0250 MEP Engineer 52,500$ 5.25$ 0270 Communications Consultant 13,125$ 1.31$ 0275 Security Consultant 13,125$ 1.31$ 393,750$ 39.38$ 10.08%


04 CONSTRUCTION0410 Demolition -$ -$ 0450 Tenant Construction 3,035,650$ 303.57$ 0460 Communications Cabling [in Technology] -$ -$ 3,035,650$ 303.57$ 77.72%




TOTAL COST REQUIRING FUNDING 3,905,750$ 390.58$ 3,905,750$ 390.58$ 100.00%

FUNDINGLandlord Funds -$ -$ -$ -$ 0.00%Tenant Funding 3,905,750$ 390.58$ 3,905,750$ 390.58$ 100.00%

3,905,750$ 390.58$ 3,905,750$ 390.58$ 100.00%

Notes & Clarifications:1234

5



March 11, 2014



Furniture costs assume new furniture throughoutMove costs assume a "box move only with no relocation of furnitureIT Infrastructure such as Servers, Switches, Routers and Phone System pricing is excluded from this pricing

Preliminary Budget_CRWD_lease.xls Page 1 of 5

PROJECT NAME: Capital Region Watershed District - Lease DATE:PROJECT LOCATION: St. Paul, MN



02 PROFESSIONAL DESIGN FEES0220 Architect 36,750$ 3.68$ 0230 Landscape Architect -$ -$ 0240 Structural Engineer -$ -$ 0250 MEP Engineer 13,125$ 1.31$ 0270 Communications Consultant 13,125$ 1.31$ 0275 Security Consultant -$ -$ 63,000$ 6.30$ 6.60%


04 CONSTRUCTION0410 Demolition -$ -$ 0450 Tenant Construction 505,500$ 50.55$ 0460 Communications Cabling [in Technology] -$ -$ 505,500$ 50.55$ 52.99%




TOTAL COST REQUIRING FUNDING 954,025$ 95.40$ 954,025$ 95.40$ 100.00%

FUNDINGLandlord Funds 400,000$ 40.00$ 400,000$ 40.00$ 41.93%Tenant Funding 554,025$ 55.40$ 554,025$ 55.40$ 58.07%

954,025$ 95.40$ 954,025$ 95.40$ 100.00%

Notes & Clarifications:1234 Tenant improvemet allowance is include for reference only; the actual amount wil be refelected after negotiations are completed.5

6



March 11, 2014



Furniture costs assume new furniture throughoutMove costs assume a "box move only with no relocation of furniture

IT Infrastructure such as Servers, Switches, Routers and Phone System pricing is excluded from this pricing

PROJECT NAME: Capital Region Watershed District - Build Option

PROJECT LOCATION: St. Paul, MN DATE: March 11, 2014PREPARED BY: Jason Mundstock

Build Option Buy Option Lease Option

02 PROFESSIONAL DESIGN FEES0220 Architect 157,500$ 31,234$ 36,750$ 0230 Landscape Architect 105,000$ -$ -$ 0240 Structural Engineer 52,500$ 11,358$ -$ 0250 MEP Engineer 52,500$ 19,876$ 13,125$ 0270 Communications Consultant 13,125$ 14,197$ 13,125$ 0275 Security Consultant 13,125$ 14,197$ -$

03 CONSULTING AND MISCELLANEOUS FEES0310 Project Management Consultant 84,000$ 56,789$ 31,500$ 0320 Legal -$ -$ -$ 0330 Insurance -$ -$ -$

04 CONSTRUCTION0410 Demolition -$ -$ -$ 0450 Tenant Construction 3,035,650$ 2,216,708$ 505,500$ 0460 Communications Cabling -$ -$ -$

05 FURNITURE, FIXTURES AND EQUIPMENT0510 Furniture 189,000$ 189,000$ 189,000$ 0520 Equipment 14,250$ 14,250$ 14,250$ 0530 Telephone/Data Communications Equip. 30,000$ 32,451$ 30,000$ 0540 Audio / Visual Equipment 40,000$ 40,000$ 40,000$ 0550 Security Equipment 12,500$ 12,500$ 12,500$ 0560 Reproduction Equipment -$ -$ -$ 0570 Food Service Equipment 7,500$ 7,500$ 7,500$ 0580 Artwork -$ -$ -$ 0585 Building and Interior Signage 12,500$ 12,500$ 12,500$

06 RELOCATION COST0610 Furniture Relocation -$ -$ -$ 0620 Move Contractor 7,500$ 7,500$ 7,500$

09 CONTINGENCY0910 Project Contingency 79,100$ 268,006$ 40,775$

TOTAL HARD & SOFT COSTS 3,513,400$ 2,364,360$ 600,000$

TOTAL PROJECT COSTS 3,905,750$ 2,948,067$ 954,025$

FUNDINGLandlord Funds (TI allowance) -$ -$ 400,000$ Tenant Funding 3,905,750$ 2,948,067$ 554,025$

3,905,750$ 2,948,067$ 954,025$ Grand Total of Funds

Project Budget Comparison

jemundstText Box

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DATE: March 12, 2014

TO: CRWD Board of Managers

FROM: Forrest Kelley, Regulatory and Construction Program Manager

RE: 13-027 Vintage on Selby Extension Request

Background

Permit 13-027 Vintage on Selby was tabled with 12 conditions on October 2, 2013, and two extension

requests have been approved. The current review period expire March 24, 2014.

While plans have been submitted to address the Board approved conditions, the applicant is looking into

alternative volume reduction practices to minimize water adjacent to the building, and have requested

additional review time to re-submit revised plans if necessary.

Requested Action

Approve the requested 60-day extension

Enc: Request Email from Ryan Companies

W:\07 Programs\Permitting\2013\13-027 Vintage On Selby\Brd Memo Vintage on Selby Extension2.docx

March 19, 2014

Regular Board Meeting

III. Permits A) 13-027 Vintage on

Selby Review Extension Request

Capitol Region Watershed District Permit Application 14-001 Montana-Greenbrier

Permit Report 14-001 March 19, 2014 Board Meeting

Applicant: Lisa Falk-Thompson Consultant: N/A City of Saint Paul Public Works 25 West Fourth Street Saint Paul, MN 55102

Description: Residential street reconstruction near the intersection of Montana and Greenbrier

Stormwater Management: Applicant has requested Volume Bank Withdrawal

District Rule: C, D, and F Disturbed Area: 3.39 Acres Impervious Area: 3.39 Acres

PERMIT RECOMMENDATION: Approve with 2 Conditions Conditions: 1. Provide a copy of the NPDES permit. 2. Provide practices to remove gross pollutants at the following locations.

a. California and Edgerton b. Idaho and Edgerton c. Iowa and Edgerton

VOLUME BANK RECOMMENDATION: Approve Withdrawal of 11,091 cubic feet of credits from the St. Paul Public Works Volume Bank

Aerial Photo

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Permit Location

Capitol Region Watershed District Permit Report

CRWD Permit #: 14-001 Review date: March 12, 2014 Project Name: Montana-Greenbrier RSVP Applicant: City of St. Paul Purpose: Street reconstruction Location: Selected streets near Payne Avenue and Wheelock Parkway. Applicable Rules: C, D, and F Recommendation: Approve with 2 Conditions Volume Bank Recommendation: Approve Withdrawal of 11,091 cubic feet of credits from the St.

Paul Public Works Volume Bank EXHIBITS:

1. Construction plan (43 sheets), by City of St. Paul, dated 12/16/13, recd. 12/20/13. 2. Soil boring map and logs, by American Engineering Testing, dated 6/12/12, recd.

12/20/13. 3. Letter to CRWD, by City of St. Paul, dated 12/17/13, recd. 12/20/13. 4. NPDES permit application, recd. 12/20/13. 5. Resubmittal documents recd 03/03/14

HISTORY & CONSIDERATIONS: None. RULE C: STORMWATER MANAGEMENT

Standards Proposed discharge rates for the 2-, 10-, and 100-year events shall not exceed

existing rates.

W:\07 Programs\Permitting\2014\14-001 Montana-Greenbrier\14-001 Montana-Greenbrier2.doc Page 1 of 4

Developments and redevelopments must reduce runoff volumes in the amount equivalent to an inch of runoff from the impervious areas of the site.

Stormwater must be pretreated before discharging to infiltration areas to maintain the long-term viability of the infiltration area.

Developments and redevelopments must incorporate effective non-point source pollution reduction BMPs to achieve 90% total suspended solid removal.

Findings 1. A hydrograph method based on sound hydrologic theory is not used to analyze

runoff for the design or analysis of flows and water levels. 2. Runoff rates for the proposed activity do not exceed existing runoff rates for

the 2-, 10-, and 100-year critical storm events. Stormwater leaving the project area is discharged into a well-defined receiving channel or pipe and routed to a public drainage system.

3. Stormwater runoff volume retention is not achieved onsite in the amount equivalent to the runoff generated from one inch of rainfall over the impervious surfaces of the development.

a. The amount of proposed impervious onsite is 147,880 square feet. b. Volume retention: Volume Retention Required (cu. ft.) Volume Retention Provided (cu. ft.)

11,091 None

4. Alternative compliance sequencing has been requested due to utility conflicts and poorly draining soils.

a. The applicant did not partially comply with the volume retention standard.

b. The applicant did not partially comply with the volume retention standard at an offsite location.

c. The applicant has not submitted money to be contributed to the Stormwater Impact Fund.

d. The project is linear, and the cost cap has not been reached. e. The applicant requests use of volume reduction banking credits.

5. Best management practices do not achieve 90% total suspended solids removal from the runoff generated by a NURP water quality storm (2.5 rainfall) or on an annual basis.

6. A memorandum of agreement for maintenance of stormwater facilities exists between the City and the CRWD.

RULE D: FLOOD CONTROL Standards Compensatory storage shall be provided for fill placed within the 100-year

floodplain.


All habitable buildings, roads, and parking structures on or adjacent to a project site shall comply with District freeboard requirements.

Findings 1. There is no floodplain on the property according to FEMA. 2. It is not known if all habitable buildings, roads, and parking structures on or

adjacent to the project site comply with CRWD freeboard requirements. However, sufficient conveyances have been provided to allow the storm sewer system to function as or better than it did prior to the project.

RULE E: WETLAND MANAGEMENT Standard

Wetlands shall not be drained, filled (wholly or in part), excavated, or have sustaining hydrology impacted such that there will be a decrease in the inherent (existing) functions and values of the wetland.

A minimum buffer of 25 feet of permanent nonimpacted vegetative ground cover abutting and surrounding a wetland is required.

Findings 1. There are no known wetlands located on the property.

RULE F: EROSION AND SEDIMENT CONTROL

Standards A plan shall demonstrate that appropriate erosion and sediment control

measures protect downstream water bodies from the effects of a land-disturbing activity.

Erosion Control Plans must adhere to the MPCA Protecting Water Quality in Urban Areas Manual.

Findings 1. Erosion and sediment control measures are consistent with best management

practices, as demonstrated in the MPCA manual Protecting Water Quality in Urban Areas.

2. Adjacent properties are protected from sediment transport/deposition. 3. Wetlands, waterbodies and water conveyance systems are protected from

erosion/sediment transport/deposition. 4. Project site is greater than 1 acre; an NPDES permit is required.

RULE G: ILLICIT DISCHARGE AND CONNECTION


Standard Stormwater management and utility plans shall indicate all existing and

proposed connections from developed and undeveloped lands for all water that drains to the District MS4.

Findings 1. New direct connections or replacement of existing connections are not

proposed. 2. Prohibited discharges are not proposed.

RECOMMENDATION: Approve with 2 Conditions Conditions:

1. Provide a copy of the NPDES permit. 2. Provide practices to remove gross pollutants at the following locations.

a. California and Edgerton b. Idaho and Edgerton c. Iowa and Edgerton


3/13/2014 Volume Banking CreditsAccount: Saint Paul Public Works

Transaction Requested Approved Permit Project Deposit Withdrawal Balance (cf)Deposit 4/4/2007 NA Chatsworth-Goodrich 10,532 10,532Withdrawal 4/4/2007 07-009 Davern 0 5,717 4,815Withdrawal 1/22/2008 08-001 Selby Avenue 0 3,790 1,025Deposit Pending 07-008 Hubbard-Griggs 9,386 10,411Withdrawal 8/20/2008 08-003 Seventh-Bay 0 8,278 2,133Withdrawal 8/20/2008 08-004 Ashland-Pascal 0 20,069 -17,936Deposit Pending 08-016 Payne Avenue 2,576 -15,360Withdrawal 3/18/2009 09-004 East Sixth Street 0 6,044 -21,404Deposit Pending 09-009 Victoria Street 1,991 -19,413Withdrawal 6/3/2009 09-011 Magnolia-Earl 0 18,356 -37,769Deposit Pending 09-017 Knapp-Ramond 2,338 -35,431Withdrawal 3/16/2010 5/5/2010 10-005 Seventh-Douglas 0 17,462 -52,893Withdrawal 4/14/2010 5/19/2010 10-011 Davern-Jefferson 0 39,308 -92,201Deposit 5/26/2010 Pending 10-014 Front-Victoria 14,791 -77,410Withdrawal 2/2/2011 2/2/2011 11-002 Fairview 18,034 -95,444Deposit 2/25/2011 Pending 11-004 Blair-Griggs 5,935 -89,509Withdrawal 2/25/2011 4/20/2011 11-005 Howell-Goodrich (revised 15,238 to Zero) 0 -89,509Withdrawal 2/25/2011 4/20/2011 11-006 Davern-Jefferson II 25,611 -115,120Deposit 9/7/2011 Pending 11-021 College Park 99,457 -15,663Transfer 10/14/2011 11/16/2011 09-031 Wells and Russell 116,436 100,773Deposit 11/16/2011 Pending 11-027 Hewitt-Tatum 4,067 104,840Deposit 1/4/2012 1/4/2012 NA St. Albans-Arundel Trenches 35,710 140,550Withdrawal 1/4/2012 Pending 11-030 Prior-Goodrich TBD 140,550Deposit 5/2/2012 Pending 12-004 Wheelock Parkway Bridge 391 140,941Deposit 9/19/2012 Pending 12-018 Hamline Library Pervious Alley 7,100 148,041Withdrawal 12/19/2012 12/19/2012 12-029 Arlington-Rice 28,035 120,006Withdrawal 2/6/2013 2/6/2013 13-001 Hatch-Agate 22,216 97,790Withdrawal 2/6/2013 2/6/2013 13-002 Hamline Avenue Bridge 6,697 91,093Deposit 5/15/2013 Pending 13-014 Trout Brook Nature Sanctuary 103,455 194,548Withdrawal 7/10/2013 7/10/2013 13-021 Jefferson-Griggs Bike Routes 5,881 188,667Withdrawal 9/18/2013 9/18/2013 13-018C Prince Street 7,303 181,364Deposit 2/19/2014 Pending 14-004 Hampden Park 24,908 206,272Withdrawal 3/5/2014 3/5/2014 13-033 Fairview-Bohland 16,626 189,646Withdrawal 3/19/2014 3/19/2004 14-001 Montana-Greenbrier 11,091 178,555

439,073 260,518 178,555

Capitol Region Watershed District Permit 14-005 Hazelden Redevelopment

Permit 14-005 March 19, 2014 Board Meeting

Aerial Photo

Applicant: Dave Hill Consultant: Marcelle Weslock Hazelden LHB, Inc. 15251 Pleasant Valley Road 701 Washington Ave North, Suite 200 Center City, MN 55012 Minneapolis, MN 55401

Description: Building removal, addition, and site improvements at 680 Stewart Avenue Stormwater Management: One surface infiltration basin and one surface filtration basin

District Rule: C, D, and F Disturbed Area: 5.75 Acres Impervious Area: 2.78 Acres

Recommendation: Approve with 6 Conditions 1. Provide a copy of the NPDES permit. 2. Receipt of $13,900 surety and documentation of recorded maintenance agreement. 3. Provide plans signed by a professional engineer per the Minnesota Board of AELSLAGID. 4. Revise basin soil mixtures to consist of 80% sand, 20% compost. 5. Provide pretreatment of runoff upstream of the filtration basin. A second SAFL Baffle could be added to

structures CB-B3 or MH-B2. 6. Provide planting plans for the basin bottoms. Establishing vegetation in stormwater BMPs from seed is not

recommended. NOTE: Consider adding iron filings (or other soil amendment) to improve dissolved pollutant removal of the fil-tration basin sand.

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CRWD Permit #: 14-005 Review date: March 12, 2014 Project Name: Hazelden Building and Site Improvements Applicant: LHB 701 Washington Ave. N, Suite 200 Minneapolis, MN 55401 612.752.6924 Purpose: Building Addition and Site Improvements Location: 680 Stewart Ave & 615 Drake Street in St. Paul. Applicable Rules: C, D, and F Recommendation: Approve with 6 Conditions EXHIBITS:

1. Stormwater Management Report, by LBH, Dated 3/5/14, Received 3/10/14. a. HydroCad Model Reports b. (Exhibit 11) Stormwater Operations and Maintenance Plan, Dated 1/30/14 c. (Exhibit 12) Geotechnical report, by AET, dated 1/15/14.

2. Boundary and Topographic Survey (2 sheets), by Cornerstone Land Surveying, Inc., dated 9/30/13, recd. 3/10/14.

3. Site plans (sheets C0.2, C0.3, C2.1, C3.1, C5.1, C5.2, L1.0, L2.0), by LHB, dated 3/4/14, recd. 3/10/14.



existing rates. Developments and redevelopments must reduce runoff volumes in the amount

equivalent to an inch of runoff from the impervious areas of the site.

W:\07 Programs\Permitting\2014\14-005 Hazelden Redevelopment\14-005 Permit_Report2 (2).doc Page 1 of 4



Findings 1. A hydrograph method based on sound hydrologic theory is used to analyze



3. Stormwater runoff volume retention is achieved onsite in the amount equivalent to the runoff generated from one inch of rainfall over the impervious surfaces of the development.


9,082 Infiltration Basin 2,674 cf

c. Banking of excess volume retention is not proposed. d. Infiltration volume and facility size has been calculated using the

appropriate hydrological soil group classification and design infiltration rate.

e. The infiltration area is capable of infiltrating a portion of the required volume within 48 hours.

f. Stormwater runoff is pretreated to remove solids before discharging to infiltration areas.

4. Alternative compliance sequencing has been requested due to shallow bedrock.

Filtration Volume Required (cu. ft.) Filtration Volume Provided (cu. ft.) 8,330 22,099

a. Banking of excess volume retention is not proposed. b. Filtration volume and facility size has been calculated using the

appropriate hydrological soil group classification and design filtration rate.

c. The filtration area is capable of filtering the required volume within 48 hours.

d. Stormwater runoff is not pretreated to remove solids before discharging to the filtration area.

5. Best management practices achieve 90% total suspended solids removal from the runoff generated on an annual basis.

6. A recordable executed maintenance agreement has not been submitted.



floodplain. All habitable buildings, roads, and parking structures on or adjacent to a

project site shall comply with District freeboard requirements. Findings 1. There is no floodplain on the property according to FEMA. 2. All habitable buildings, roads, and parking structures on or adjacent to the

project site do comply with CRWD freeboard requirements. RULE E: WETLAND MANAGEMENT Standard













RULE G: ILLICIT DISCHARGE AND CONNECTION Standard Stormwater management and utility plans shall indicate all existing and





1. Provide a copy of the NPDES permit. 2. Receipt of $13,900 surety and documentation of recorded maintenance

agreement. 3. Provide plans signed by a professional engineer per the Minnesota Board of

AELSLAGID. 4. Revise basin soil mixtures to consist of 80% sand, 20% compost. 5. Provide pretreatment of runoff upstream of the filtration basin. A second SAFL

Baffle could be added to structures CB-B3 or MH-B2. 6. Provide planting plans for the basin bottoms. Establishing vegetation in

stormwater BMPs from seed is not recommended. NOTE: Consider adding iron filings (or other soil amendment) to improve dissolved pollutant removal of the filtration basin sand.


COPYRIGHT HAMMEL, GREEN AND ABRAHAMSON, INC.

HGA NO:

C

DATE:

STRUCTURAL ENGINEER

HGA420 5th ST N, SUITE 100

MINNEAPOLIS, MN 55401612.758.4000

MECHANICAL/PLUMBING ENGINEER

HORWITZ NS/I4401 QUEBEC AVE N

NEW HOPE, MN 55428763.533.1900

ELECTRICAL ENGINEER

PARSONS5960 MAIN ST NE,

MINNEAPOLIS, MN 55432763.571.8000

CIVIL ENGINEER

LHB701 WASHINGTON AVE N, ST 200

MINNEAPOLIS, MN 55401612.338.2029

LANDSCAPE ARCHITECT

LHB701 WASHINGTON AVE N, ST 200

MINNEAPOLIS, MN 55401612.338.2029

INTERIOR ARCHITECT

HGA420 5th ST N, SUITE 100

MINNEAPOLIS, MN 55401612.758.4000

GENERAL CONTRACTOR

KNUTSON CONSTRUCTION7515 WAYZATA BLVD

MINNEAPOLIS, MN 55426763.546.1400

HAZELDEN ST PAUL

680 STEWART AVE,ST PAUL, MN 55102

4 2 0 5 t h S t r e e t N o r t h , S u i t e 1 0 0

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NAME:DATE:REGISTRATION NUMBER:

I HEREBY CERTIFY THAT THIS PLAN, SPECIFICATIONOR REPORT WAS PREPARED BY ME OR UNDER MYDIRECT SUPERVISION AND THAT I AM A DULYLICENSED ARCHITECT UNDER THE LAWS OF THESTATE OF

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MINNESOTA

GMP

2762-029-00

3/4/2014

C2.1

DRAINAGE PLANGRADING AND

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Capitol Region Watershed District Permit 14-008 Lowertown Ballpark

Permit 14-008 Lowertown Ballpark March 19, 2014 Board Meeting

Aerial Photo

Applicant: Jody Martinez Consultant: Matt Holmboe St. Paul Parks and Recreation Solution Blue, Inc. 25 West Fourth Street 318 Cedar Street St. Paul, MN 55102 St. Paul, MN 55101 Description: Construction of a new Saints ballpark at 5th Street between Broadway and John Streets. Stormwater Management: Filtration rain gardens, tree trenches, underground filtration and rainwater reuse District Rule: C, D, and F Disturbed Area: 9.5 Acres Impervious Area: 4.55 Acres

RECOMMENDATION: Approve with 4 Conditions Conditions: 1. Provide plans signed by a professional engineer per the Minnesota Board of AELSLAGID. 2. Clarify subwatershed boundaries or drainage routes:

a. Label curb cut locations surrounding the rain garden. b. Show the trench drain that will collect runoff from PR-2.

3. Show how runoff from PR-5b between PR-3b and PR-2 is directed to the right field underground storage. a. Provide additional detail so that the plans, profiles and HydroCAD correspond: b. Reduce structural soil voids to 26% or provide documentation to support a higher value. c. For Detail 6 on sheet C551, revise rock void space to 40% in HydroCAD model or provide documentation to sup

port a higher value. 4. For Pond 1P Field Storage, provide a cross-section of the field that corresponds with HydroCAD.

Amend the SWPPP and submit an updated erosion and sediment control plan to better reflect how to protect the per manent stormwater management during the process of construction.

Permit Location

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CRWD Permit #: 14-008 Review date: March 12, 2014 Project Name: Lowertown Ballpark Stormwater Management Plan Applicant: City of St. Paul Parks and Recreation 25 West 4th Street, Suite 400 St. Paul, MN 55102 Purpose: Request for a stormwater management and flood control permit for

the St. Paul Lowertown baseball park Location: Lowertown, St. Paul near the intersection of Broadway and 5th

Streets and southwest of the Lafayette Bridge Applicable Rules: C, D and F Recommendation: Approve with 4 Conditions EXHIBITS:

1. Lowertown Ballpark Stormwater Management Plan, by Solution Blue, dated 3/10/14, recd. 3/10/14.

HISTORY & CONSIDERATIONS: The ballpark is being designed and constructed under the design-build process. An erosion and sediment control permit was obtained from CRWD in 2013 prior to site preparation. RULE C: STORMWATER MANAGEMENT



equivalent to an inch of runoff from the impervious areas of the site. Stormwater must be pretreated before discharging to infiltration areas to

maintain the long-term viability of the infiltration area.

W:\07 Programs\Permitting\2014\14-008 Lowertown Stormwater\14-008 PermitReport2.doc Page 1 of 4





3. Stormwater runoff volume retention is not achieved onsite in the amount equivalent to the runoff generated from one inch of rainfall over the impervious surfaces of the development.

a. The amount of proposed impervious onsite is 198,198 square feet for the ballpark and 14,200 for a portion of 4th Street.

b. Volume retention: Volume Retention Required (cu. ft.) Volume Retention Provided (cu. ft.)

Ballpark: 14,865 4th Street: 1,065 Total = 15,930

None, filtration is proposed.

c. Alternative compliance sequencing has been requested due to

contaminated soils. d. Filtration is proposed: Volume Retention Required (cu. ft.) Volume Retention Provided (cu. ft.)

Ballpark: 19,325 4th Street: 1,385 Total = 20,710

21,137

e. Banking of excess volume retention is not applicable. f. Filtration volume and facility sizes have been calculated using the


g. The filtration areas are capable of infiltrating the required volume within 48 hours.

h. Stormwater runoff is pretreated to remove solids before discharging to filtration areas.


5. A Memorandum of Understanding exists between the City of St. Paul Parks Department and CRWD.





project site comply with CRWD freeboard requirements. RULE E: WETLAND MANAGEMENT Standard








Findings 1. An erosion and sediment control permit was issued during 2013 for site

preparation work. 2. An updated plan has not been submitted to show how stormwater management

facilities will be protected from sediment deposition during construction. RULE G: ILLICIT DISCHARGE AND CONNECTION







1. Provide plans signed by a professional engineer per the Minnesota Board of AELSLAGID.

2. Clarify subwatershed boundaries or drainage routes: a. Label curb cut locations surrounding the rain garden. b. Show the trench drain that will collect runoff from PR-2. c. Show how runoff from PR-5b between PR-3b and PR-2 is directed to the

right field underground storage. 3. Provide additional detail so that the plans, profiles and HydroCAD correspond:

a. Reduce structural soil voids to 26% or provide documentation to support a higher value.

b. For Detail 6 on sheet C551, revise rock void space to 40% in HydroCAD model or provide documentation to support a higher value.

c. For Pond 1P Field Storage, provide a cross-section of the field that corresponds with HydroCAD.

4. Amend the SWPPP and submit an updated erosion and sediment control plan to better reflect how to protect the permanent stormwater management during the process of construction.


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PROJECT NAME

LOCATION

SHEET TITLE

DRAWN BY CHECKED BY

JOB NO. DATE

SHEET NO.

REGISTRATIONNO. DATE

RYAN A+E, INC.

50 South Tenth Street, Suite 300Minneapolis, MN 55403-2012

612-492-4000 tel612-492-3000 fax

ST. PAUL, MN

LOWERTOWNBALLPARK

3/10/2014 11:59:35 AM

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I hereby certify that this plan, specification,or report was prepared by me or under mydirect supervision and that I am a dulyLicensed Professional Engineer under thelaws of the State of Minnesota.

STORMWATERDESIGN PLAN

130401

ISSUE RECORDISSUE # DATE DESCRIPTION

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

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

ENGINEER'S NAME

318 Cedar StreetSaint Paul, MN 55101office: 612-294-0038

LOWERTOWN BALLPARKSTORMWATER DESIGN PLAN

DRAFT - NOT FORCONSTRUCTION

RAT

www.solutionblue.com

02/26/2014

LEGEND

4TH STREET RE-ALIGNMENT EAST OF LAFAYETTE BRIDGE

( IN FEET )

DRAWING SCALE0SBI

N

20 8040

SHEET NOTES:

1 8/14/13 CRWD MEETING #2

2 11/12/13 60% DD SUBMITTAL

5 02/26/14 CRWD STORMWATERPERMIT SET

3 12/13/13 100% DD SUBMITTAL

4 1/31/14 SITE PLAN REVIEW

CIVIL GRADING AND SITEBID PACKAGE

6 03/07/14

7 03/10/14 ADDRESS CRWD PERMITSET COMMENTS

Capitol Region Watershed District Permit Application 14-009 Waters of Highland

Permit Report 14-009 March 19, 2014 Board Meeting

Applicant: Lynn Carlson Schell Consultant: Mike St. Martin The Waters Senior Living Loucks Associates 1600 Hopkins Crossroad 7200 Hemlock Lane, Suite 300 Minnetonka, MN 55305 Maple Grove, MN 55369

Description: Construction of new senior housing Stormwater Management: Two underground infiltration systems District Rule: C, D, and F Disturbed Area: 1.06 Acres

PERMIT RECOMMENDATION: Approve with 5 Conditions 1. Receipt of surety and maintenance agreement. 2. Provide plans signed by a professional engineer per the Minnesota Board of AELSLAGID. 3. Provide copy of issued NPDES permit. 4. Provide a sump or alternative pretreatment device at STMH-40. 5. Revise underground infiltration system detail on sheet C8-2:

a. Remove geotextile fabric from the bottom of the system, fabric on top and sides only b. Specify that storage rock shall be non-limestone material.

Aerial Photo

Sn

elling

Eleanor Ave

Permit Location


CRWD Permit #: 14-009 Review date: March 7, 2014 Project Name: Waters of Highland Applicant: The Waters Senior Living, LLC 1600 Hopkins Crossroad Minnetonka, MN 55305 Purpose: Redevelopment of an existing building and parking lot Location: Northeast corner of Snelling Avenue South and Eleanor Avenue in

St. Paul Applicable Rules: C, D, and F Recommendation: Approve with 5 Conditions EXHIBITS:

1. ALTA/ACSM Land Title Survey, by Loucks Associates, dated 10/17/13, recd. 2/25/14.

2. Construction plans (sheets C1-2, C2-1, C3-1, C3-2, C4-1, C8-1, and C8-2), by Loucks Associates, dated 2/21/14, recd. 2/25/14.

3. Hydrology Report, by Loucks Associates, dated 2/9/14, recd. 2/25/14. 4. Soil boring logs, by Braun Intertec, dated 2/4/14, recd. 2/25/14.




equivalent to an inch of runoff from the impervious areas of the site.

W:\07 Programs\Permitting\2014\14-009 Waters of Highland\14-009 Permit_Report1.doc Page 1 of 4






3. Stormwater runoff volume retention is achieved onsite in the amount equivalent to the runoff generated from one inch of rainfall over the impervious surfaces of the development.


2,449 2,779

c. Banking of excess volume retention is not proposed. d. Infiltration volume and facility size has been calculated using the


e. The infiltration areas are capable of infiltrating the required volume within 48 hours.

f. Stormwater runoff is not pretreated to remove solids before discharging to infiltration areas.


5. A recordable executed maintenance agreement has not been submitted.




project site comply with CRWD freeboard requirements.


RULE E: WETLAND MANAGEMENT Standard












RULE G: ILLICIT DISCHARGE AND CONNECTION







1. Receipt of $3,750 surety and documentation of maintenance agreement recorded with Ramsey County.

2. Provide plans signed by a professional engineer per the Minnesota Board of AELSLAGID.

3. Provide copy of issued NPDES permit. 4. Provide a sump or alternative pretreatment device at STMH-40. 5. Revise underground infiltration system detail on sheet C8-2:

a. Remove geotextile fabric from the bottom of the system, fabric on top and sides only

b. Specify that storage rock shall be non-limestone material.


NOT F

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CONS

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TION

Date

Drawn By

Checked By

Project Number

2104 4th Avenue S.Suite BMinneapolis, MN 55404tel: (612) 879-6000fax: (612) 879-6666www.kaaswilson.com

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The Waters ofHighland Park

The Waters SeniorLiving, LLC

678 Snelling Avenue SouthSaint Paul, MN 55116

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Landscape Architecture EnvironmentalPlanning Civil Engineering Land Surveying

for use solely with respect to this project. These CADD filesare instruments of the Consultant professional servicesCADD files prepared by the Consultant for this project

by the Consultant. With the Consultant's approval, others

Consultant from any & all responsibilities, claims, and liabilities.deletions and that party shall hold harmless and indemnify theat the full risk of that party making such revisions, additions or

revisions, additions, or deletions to these CADD files shall be madefiles for information and reference only. All intentional or unintentional

may be permitted to obtain copies of the CADD drawing

or for completion of this project by others without written approvalshall not be used on other projects, for additions to this project,

MJS

TDG

02/21/2014

13449

WARNING:THE CONTRACTOR SHALL BE RESPONSIBLE FOR CALLING FOR LOCATIONS OF ALLEXISTING UTILITIES. THEY SHALL COOPERATE WITH ALL UTILITY COMPANIES INMAINTAINING THEIR SERVICE AND / OR RELOCATION OF LINES.

THE CONTRACTOR SHALL CONTACT GOPHER STATE ONE CALL AT 651-454-0002 ATLEAST 48 HOURS IN ADVANCE FOR THE LOCATIONS OF ALL UNDERGROUND WIRES,CABLES, CONDUITS, PIPES, MANHOLES, VALVES OR OTHER BURIED STRUCTURES BEFOREDIGGING. THE CONTRACTOR SHALL REPAIR OR REPLACE THE ABOVE WHEN DAMAGEDDURING CONSTRUCTION AT NO COST TO THE OWNER.

STORMWATERPOLLUTION

PREVENTIONPLAN

C3-2

STORM WATER POLLUTION PREVENTION PLAN (SWPPP)

GENERAL NOTES:

1. THE NATURE OF THIS PROJECT WILL CONSIST OF CONSTRUCTING: A SENIOR HOUSING DEVELOPMENT, STORM WATERSYSTEM, ABOVE & BELOW GROUND PARKING, & ASSOICATED UTILITIES.

2. THE INTENDED SEQUENCING OF MAJOR CONSTRUCTION ACTIVITIES ARE AS FOLLOWS:1. INSTALL STABILIZED ROCK CONSTRUCTION ENTRANCE PAD.2. INSTALLATION OF STAGE 1 SILT FENCE AROUND SITE.3. DEMOLISH EX BUILDING ON SITE4. ROUGH GRADING OF SITE.5. INSTALL SANITARY SEWER, WATERMAIN, STORM SEWER, AND SERVICES.6. CONSTRUCT SENIOR HOUSING BUILDING7. SUB-CUT STREETS, INSTALL STREET SECTION.8. INSTALL CURB AND GUTTER.9. BITUMINOUS ON STREETS

10. INSTALL STAGE 3 SILT FENCE BEHIND ALL CURB11. WHEN ALL CONSTRUCTION ACTIVITY IS COMPLETE AND THE SITE IS STABILIZED, REMOVE SILT FENCE AND RESEED ANY

AREAS DISTURBED BY THE REMOVAL.

3. SITE DATA:AREA TO BE DISTURBED = 1.06 ac.

PRIOR TO CONSTRUCTION POST CONSTRUCTIONIMPERVIOUS AREA: 0.63 ac. 0.75 ac.

SOIL TYPES: SEE SOILS REPORT

4. THE LOCATION OF AREAS NOT TO BE DISTURBED MUST BE IDENTIFIED WITH FLAGS, STAKES, SIGNS, SILT FENCE, ETC. BEFORECONSTRUCTION BEGINS.

5. CONSTRUCTION ACTIVITY - EROSION PREVENTION PRACTICESTIME AN AREA CAN REMAINOPEN WHEN NOT ACTIVELYBEING WORKED TYPE OF SLOPE

7 DAYS STEEPER THAN 3:1 7 DAYS 10:1 TO 3:17 DAYS FLATTER THAN 10:1

6. ON SLOPES 3:1 OR GREATER MAINTAIN SHEET FLOW AND MINIMIZE RILLS AND/OR GULLIES, SLOPE LENGTHS CAN NOT BEGREATER THAN 75 FEET.

7. ALL STORM DRAINS AND INLETS MUST BE PROTECTED UNTIL ALL SOURCES OF POTENTIAL DISCHARGE ARE STABILIZED.

8. TEMPORARY SOIL STOCKPILES MUST HAVE EFFECTIVE SEDIMENT CONTROL AND CAN NOT BE PLACED IN SURFACE WATERSOR STORM WATER CONVEYANCE SYSTEMS. TEMPORARY STOCKPILES WITHOUT SIGNIFICANT AMOUNT OF SILT, CLAY, ORORGANIC COMPOUNDS ARE EXEPMT EX: CLEAN AGGREGATE STOCK PILES, DEMOLITION CONCRETE STOCKPILES, SANDSTOCKPILES.

9. SEDIMENT LADEN WATER MUST BE DISCHARGED TO A SEDIMENTATION BASIN WHENEVER POSSIBLE. IF NOT POSSIBLE, ITMUST BE TREATED WITH THE APPROPRIATE BMP'S.

10. SOLID WASTE MUST BE DISPOSED OF PROPERLY AND MUST COMPLY WITH MPCA DISPOSAL REQUIREMENTS.

11. EXTERNAL WASHING OF CONSTRUCTION VEHICLES MUST BE LIMITED TO A DEFINED AREA OF THE SITE.

12. NO ENGINE DEGREASING IS ALLOWED ON SITE.

13. THE OWNER WHO SIGNS THE NPDES PERMIT APPLICATION IS A PERMITTEE AND IS RESPONSIBLE FOR COMPLIANCE WITH ALLTERMS AND CONDITIONS OF THE PERMIT. THE OPERATOR (CONTRACTOR) WHO SIGNS THE NPDES PERMIT APPLICATION IS APERMITTEE FOR PARTS II.B., PART II.C AND PART IV. OF THE NPDES PERMIT AND IS JOINTLY RESPONSIBLE WITH THE OWNERFOR COMPLIANCE WITH THOSE PORTIONS OF THE PERMIT.

14. CHANGE OF COVERAGE-UPON COMPLETION OF GRADING, UTILITIES, AND STREET CONSTRUCTION THE NEW OWNER (HOMEBUILDER) MUST SUBMIT A SUBDIVISION REGISTRATION WITHIN 7 DAYS OF ASSUMING OPERATIONAL CONTROL OF THE SITE,COMMENCING WORK ON THEIR PORTION OF THE SITE, OR OF THE LEGAL TRANSFER, SALE OR CLOSING ON THE PROPERTY.%%UNOTE:%%U THE NEW CAN IMPLEMENT THE ORIGINAL SWPPP CREATED FOR THE PROJECT OR DEVELOP AND IMPLEMENTTHEIR OWN SWPPP.

15. TERMINATION OF COVERAGE-PERMITTEE(S) WISHING TO TERMINATE COVERAGE MUST SUBMIT A NOTICE OF TERMINATION(NOT) TO THE MPCA. ALL PERMITTEE(S) MUST SUBMIT A NOT WITHIN 30 DAYS AFTER ONE OR MORE OF THE FOLLOWINGCONDITIONS HAVE BEEN MET:A. FINAL STABILIZATION, PER NPDES PERMIT PART IV.G. AND DEFINITION IN APPENDIX B HAS BEEN ACHIEVED ON ALL

PORTIONS OF THE SITE FOR WHICH THE PERMITTEE IS RESPONSIBLE.B. ANOTHER OWNER HAS ASSUMED CONTROL OVER ALL AREAS OF THE SITE THAT HAVE NOT BEEN FINALLY STABILIZED.C. FOR RESIDENTIAL CONSTRUCTION ONLY, TEMPORARY EROSION PROTECTION AND DOWN GRADIENT PERIMETER

CONTROL FOR INDIVIDUAL LOTS HAS BEEN COMPLETED AND THE RESIDENCE HAS BEEN TRANSFERRED TO THEHOMEOWNER. ADDITIONALLY, THE PERMITTEE MUST DISTRIBUTE THE MPCA'S "HOMEOWNER FACT SHEET" TO THEHOMEOWNER TO INFORM THE HOMEOWNER OF THE NEED FOR, AND BENEFITS OF, FINAL STABILIZATION.

16. INSPECTIONSA. INITIAL INSPECTION FOLLOWING SILT FENCE INSTALLATION BY CITY REPRESENTATIVE IS REQUIRED.B. EXPOSED SOIL AREAS: ONCE EVERY 7 DAYS AND WITHIN 24 HOURS FOLLOWING A 0.5" OVER 24 HOURS RAIN EVENT.C. STABILIZED AREAS: ONCE EVERY 30 DAYS D. FROZEN GROUND: AS SOON AS RUNOFF OCCURS OR PRIOR TO RESUMING

CONSTRUCTION.

17. OWNER MUST KEEP RECORDS OF ALL PERMITS REQUIRED FOR THE PROJECT, ALL INSPECTIONS AND MAINTENANCE,PERMANENT OPERATION AND MAINTENANCE AGREEMENTS, AND REQUIRED CALCULATIONS FOR TEMPORARY ANDPERMANENT STORM WATER MANAGEMENT SYSTEMS. THESE RECORDS MUST BE RETAINED FOR THREE YEARS.

18. SWPPP MUST BE AMENDED WHEN:A. THERE IS A CHANGE IN DESIGN, OPERATION, MAINTENANCE, WEATHER OR SEASONAL CONDITIONS THAT HAS A

SIGNIFICANT EFFECT ON DISCHARGEB. INSPECTIONS INDICATE THAT THE SWPPP IS NOT EFFECTIVE AND DISCHARGE IS EXCEEDING WATER QUALITY STANDARDS.C. THE BMP'S IN THE SWPPP ARE NOT CONTROLLING POLLUTANTS IN DISCHARGES OR IS NOT CONSISTENT WITH THE

TERMS AND CONDITIONS OF THE PERMIT.

SILT FENCE REQUIRED MAINTENANCE:1. WHEN SEDIMENT REACHES 1/3 THE HEIGHT OF SILT FENCE IT MUST BE REMOVED WITHIN 24 HOURS.2. REPAIR OR REPLACE DYSFUNCTIONAL SILT FENCE WITHIN 24 HOURS.

19. ADJACENT STREET AND ALLEYS MUST BE SWEPT TO KEEP THEM FREE OF SEDIMENT. CONTRACTOR MUST MONITORCONDITIONS AND SWEEP AS NEEDED OR WITHIN 24 HOURS OF NOTICE BY THE CITY.


DATE: March 12, 2014 TO: CRWD Board of Managers FROM: Anna Eleria, Water Resource Project Manager RE: TBI Drainage Improvements at Cottage Ave. and Farrington St - Feasibility Study Report

Background In late 2011, CRWD staff was first made aware of a local flooding problem in the backyard of 300 Cottage Avenue West, which is adjacent to CRWDs Trout Brook Storm Sewer Interceptor. This area receives runoff from its own property and neighboring properties to the east and from multi-family properties and BNSF right-of-way to the west. The existing flared inlet to TBI, which is upstream and west of the affected property, is undersized and improperly designed. The flared inlet frequently was blocked with organic debris and trash after a rainstorm and stormwater runoff bypassed the inlet and the associated berm and flowed into and ponded in the backyard of 300 Cottage Avenue. For a year and a half, CRWD staff conducted frequent minor maintenance work to improve drainage to the existing inlet. Issues In 2013, CRWD approached the localized flooding issue in two ways. First, CRWD hired a contractor in late summer 2013 to conduct more significant maintenance work that included clearing sediment, trash and debris from the area around the inlet, grading work in the ditch upstream of the inlet, and repairing and raising the berm. Based on follow-up inspections, the inlet has remained clear and open helping to ensure runoff from the west flows into TBI inlet. The work eliminated the need for CRWD staff to conduct any minor maintenance work last fall. Second, CRWD commenced a feasibility study to better understand the issue, evaluate its cause(s) and identify potential long-term solutions. The feasibility study, conducted by Barr Engineering, included field investigations, detailed modeling, and evaluation of flood mitigation alternatives including volume-reduction/water quality improvement strategies. The draft feasibility report has been completed and is enclosed for the Boards review and comment including a recommendation on the preferred alternative. Barr Engineering staff will present the draft feasibility report and CRWD staff will share comments received from the CAC who heard the presentation at their March meeting. Action Requested None required, for your review and comment including a recommendation on preferred alternative for drainage improvements at TBI Cottage Ave. and Farrington St. enc: TBI Drainage Improvements at Cottage Ave. and Farrington St. - Feasibility Study Report W:\06 Projects\Trout Brook Interceptor\TBI Farrington-Cottage\Board Memos\BM TBI Farrington Feasibility Study Report 03-19-14.docx

March 19, 2014 IV. Special Report A) TBI Drainage Improvements at Cottage and Farrington -

Feasibility Study Report (Eleria)

TITLE OF REPORT Date of Report

Feasibility Report: Trout Brook Storm Sewer Interceptor Drainage Improvements at Vicinity of Cottage Ave. and Farrington St.

Capitol Region Watershed District Saint Paul, MN Barr Engineering Co. J. Herbert, N. Campeau, and M. McKinney March 2014

Feasibility Report Trout Brook Storm Sewer Interceptor Drainage Improvements at Vicinity of Cottage Ave. and Farrington St. Prepared for Capitol Region Watershed District March 2014

4700 West 77th

Street Minneapolis, MN 55435-4803 Phone: (952) 832-2600 Fax: (952) 832-2601

P:\Mpls\23 MN\62\2362944\WorkFiles\TBI Engineer\Farrington Erosion and HH Study\Workfiles\Report\FarringtonCottage_Report March

2014.docx i

Feasibility Report Trout Brook Storm Sewer Interceptor Drainage Improvements at

Vicinity of Cottage Ave. and Farrington St.

March 2014

Table of Contents

1.0 Background ............................................................................................................................................ 1

1.1 Purpose ........................................................................................................................................ 1

1.2 Background and Scope ............................................................................................................... 1

1.3 Study Area .................................................................................................................................. 2

2.0 Modeling ................................................................................................................................................ 3

2.1 Delineation of Subwatersheds & Field Review .......................................................................... 3

2.2 Hydraulic and Hydrologic Modeling .......................................................................................... 3

2.3 Localized Flooding ..................................................................................................................... 4

2.4 Localized Flooding Mitigation Alternatives ............................................................................... 5

3.0 Results .................................................................................................................................................... 6

3.1 Alternative 1 Replacement of Inlet Downstream of Farrington Ave. ...................................... 6

3.2 Alternative 2 New Inlet Upstream of Farrington Ave. ............................................................ 6

3.3 Alternative 3 Rain Garden Upstream of Farrington Ave. ........................................................ 7

3.4 Alternative 4 New Inlet and Rain Garden Upstream of Farrington Ave. ................................ 9

4.0 Conclusion ............................................................................................................................................ 11

List of Tables

Table 1 Localized Flooding Inundation Area, Volume, and Depth ................................................ 4

Table 2 Flood Volume Sources. ................................................................................................... 5

Table 3 Alternative 1 Opinion of Cost .......................................................................................... 6



Table 6 Proposed Rain Garden Cost-Benefit Summary ................................................................. 9

Table 7 Alternative 4 Opinion of Cost ........................................................................................ 10

Table 8 Flood Mitigation Alternatives Summary ........................................................................ 10

List of Figures

Figure 1 Study Area

Figure 2 Land Use

Figure 3 Storm sewer

Figure 4 Existing Inundation Area

Figure 5 Flood Mitigation Alternatives

P:\Mpls\23 MN\62\2362944\WorkFiles\TBI Engineer\Farrington Erosion and HH Study\Workfiles\Report\FarringtonCottage_Report March 2014.docx ii

List of Appendices

Appendix A Technical Addendum

P:\Mpls\23 MN\62\2362944\WorkFiles\TBI Engineer\Farrington Erosion and HH Study\Workfiles\Report\FarringtonCottage_Report March 2014.docx 1

1.0 Background

1.1 Purpose

The purpose of this feasibility report is to provide a summary related to potential Trout Brook Storm

Sewer Interceptor (TBI) drainage improvements in the vicinity of Cottage Ave. and Farrington St. in

Saint Paul, MN. Specifically, this report provides updates to the CRWDs existing TBI XP-SWMM

model, and outlines potential localized flood mitigation alternatives and associated opinions of cost.

1.2 Background and Scope

The Capitol Region Watershed District (CRWD) is aware of a localized flooding concern at 300

Cottage Ave. W. The low-lying area on this property periodically experiences standing water

following precipitation events, prompting complaints from the homeowner. It is our understanding

that localized flooding does not impact any homes or other permanent structures. Upstream of the

localized flooding, there is a 12-inch inlet to the TBI. Possible sources of localized flooding include

(a) direct drainage to the property and (b) flow-bypassing the 12-inch inlet near the property.

In 2012, a detailed XP-SWMM model of the entire TBI system was developed. Although the 12-inch

inlet was included in the 2012 TBI model, watershed divides in the area were only developed to TBI

inlet points. Therefore, due to the unique local drainage, further refinement of the existing TBI model

in the vicinity of Cottage Ave. and Farrington St. was required to evaluate sources of localized

flooding and potential solutions.

To determine the probable sources of localized flooding at 300 Cottage Ave. W and determine

potential improvements, the following tasks were performed:

1. Delineate and field verify subwatersheds to the location of localized flooding and nearby storm sewer inlets.

2. Update the CRWDs existing XP-SWMM model to determine probable causes of localized flooding.

3. Evaluate flood mitigation alternatives using the updated XP-SWMM model.

All existing conditions detailed modeling will be incorporated into the current version of the TBI XP -

SWMM model. This technical report summarizes findings related to the referenced tasks and will be

added to the 2012 TBI XP-SWMM model report as an addendum.


1.3 Study Area

The study area includes all potential sources of direct drainage to the localized flooding area on 300

Cottage Ave. W. This area is generally bounded to the North, East, South, and West by Arlington

Ave. W, Galtier St., the BNSF freight rail line, and W. Wheelock Pkwy., respectively. Figure 1

shows the extent of the study area, subwatershed divides, and the area of localized flooding.


2.0 Modeling

2.1 Delineation of Subwatersheds & Field Review

To better understand drainage patterns and potential sources of flooding in the vicinity of Cottage

Ave. and Farrington St., subwatersheds from the 2012 TBI XP-SWMM model were further refined

and subdivided. Typically, this involved redefining subwatersheds in the study area to represent

individual stormsewer inlets, catch basin clusters, and potential sources of direct drainage to the

localized flooding. The updated subwatershed divides were developed using a variety of data sources

including:

One-foot topography for the City of St. Paul.

High resolution (1 meter, resampled to 3.3 meter grid cell resolution) LiDAR data collected

by the National Geodetic Survey (NGS) for the Republican National Convention (RNC) in

June 2007 covering the entire study area, to supplement the data provided by the CRWD. It

was also used to create a Digital Elevation Model (DEM) that was used to develop model

input parameters.

As-built storm sewer plan sheets for the City of St. Paul. Figure 3 shows the existing

stormsewer network, including Trout Brook Interceptor, in the study area.

After initially refining subwatershed divides based on the data sources listed above, a field review

was conducted on June 25, 2013 to confirm drainage patterns and the location of storm sewer inlets.

Figure 1 illustrates the final watershed divides used in XP-SWMM modeling efforts. Nineteen

subwatersheds were defined within the study area, ranging in area from 0.3 to 6.8 acres.

2.2 Hydraulic and Hydrologic Modeling

CRWDs 2012 XP-SWMM model was used for this analysis. Updated subwatershed divides in the

study area were incorporated into the existing model. This involved generating hydrologic

parameters for all new subwatersheds, and defining hydraulic parameters associated with storm sewer

flow and overland runoff within the project area. The Technical Addendum, included as Appendix A

of this report, details the hydrologic and hydraulic modeling assumptions used for this analysis.


2.3 Localized Flooding

Using the updated and refined XP-SWMM model, inundation mapping was performed for the 2-, 10-,

and 100-year rainfall events (Figure 4). Inundation area and localized flood depths are summarized in

Table 1. Modeling results suggest that the low-lying area near 300 Cottage Ave. W floods to a depth

of approximately two feet and four feet for the 2-year and 100-year rainfall events, respectively.

Based on 2007 LiDAR data, inundation depth would need to approach 10 feet to impact the apparent

low home located at 1355 Galtier St (Figure 4).

Table 1 Localized Flooding Inundation Area, Volume, and Depth

Return

Interval

Inundation

Area (ac)

Flooding

Depth (ft)

Flood Volume

(ac-ft)

2-yr 0.20 2.0 0.15

10-yr 0.46 3.1 0.52

100-yr 0.67 4.1 1.0

The hydrologic and hydraulic analyses indicate that there are two primary sources of runoff

contributing to localized flooding: (1) direct runoff from the subwatershed to the low-lying area and

(2) flow bypassing a 12-inch inlet to the TBI located to the southwest of the low-lying property. The

4.9-acre drainage area, identified as FC_17 on Figure 1 (direct drainage area to localized flooding),

produces the majority of flood volume, particularly for smaller events (Table 2) . Three acres of the

high density residential area between Western Ave. N and Farrington St. (FC_11 on Figure 2) is not

directly serviced by storm sewer. Stormwater runoff from this area is conveyed via a ditch to the 12-

inch inlet. High flows from the developed area periodically overwhelm the 12-inch inlet and overtop

the berm contributing to localized flooding. Modeling indicates that the 2-year, 24-hour rainfall event

generates runoff sufficient to overtop the berm. The field investigation performed on June 25, 2013

corroborates this modeling result, as obvious signs of erosion and minor-washout were observed

along the ditch between the developed area and the inlet, and from the toe of the berm to the low-

lying area.


Table 2 Flood Volume Sources.

Direct Drainage Bypassing 12-inch Inlet

Return

Interval

Total Flood

Volume (ac-ft)

Flood Volume

(ac-ft)

% of Total

Flood Volume

Flood Volume

(ac-ft)

% of Total

Flood Volume

2-yr 0.15 0.14 89.4 0.02 10.6

10-yr 0.52 0.38 72.9 0.14 27.1

100-yr 1.04 0.71 67.9 0.33 32.1

2.4 Localized Flooding Mitigation Alternatives

Localized flood mitigation alternatives were developed and evaluated using the updated XP-SWMM

model. Corrective measures were developed to improve stormwater conveyance and/or reduce

stormwater volumes. Strategies investigated included:

Increasing stormwater conveyance capacity by installing new TBI inlet.

Improving existing collector ditch and inlet locations.

Implementing volume-reduction strategies.

Ultimately, four potential mitigating measures were investigated. The following results section

provide brief descriptions of each of the four flood mitigation options evaluated and provide

preliminary opinions of construction costs for each alternative.


3.0 Results

All alternatives presented are located within CRWDs TBI easement over BNSF property . Careful

review of the easement agreement with BNSF will be necessary to determine which alternatives, if

any, are allowed by the terms of the existing agreement.

3.1 Alternative 1 Replacement of Inlet Downstream of Farrington Ave.

Replace the existing 12-inch inlet identified on Figure 3 with a 3-foot diameter beehive inlet

structure (Figure 5). The objective of this alternative is to increase stormwater conveyance capacity

into the TBI such that the berm (Figure 3) would no longer overtop during the 100-year rainfall

event.

Modeling indicates that the proposed 3-foot diameter beehive structure has sufficient capacity to

convey ditch-flow into the TBI without further modifications to the existing berm. For this

alternative, runoff to the low-lying area is generally limited to its direct drainage area. Reductions in

flood depth, flood volume, and inundation area associated with this alternative are shown in Table 8.

Table 3 Alternative 1 Opinion of Cost

Bid Item Item Description Unit Estimated

Quantity

Unit Price Total

Extension

1.1 Mobilization/Demobilization L.S. 1 $1,500 $1,500

1.2 Remove and dispose existing

inlet

L.S. 1 $1,000 $1,000

1.3 Beehive inlet EA 1 $1,500 $1,500

1.4 36" riser EA 1 $2,700 $2,700

1.5 Connect riser to TBI EA 1 $5,000 $5,000

1.6 Erosion control L.S. 1 $3,000 $3,000

1.7 Site Restoration L.S. 1 $1,000 $1,000

1.8 Contingency Approx. 30%* L.S. 1 $5,000 $5,000

Total (Alternative 1) $20,700 *Contingency includes unforeseen construction costs that are not included in this conceptual-level opinion of cost.

3.2 Alternative 2 New Inlet Upstream of Farrington Ave.

Retain the existing 12-inch inlet structure and install a 3-foot beehive structure along the

collector ditch which receives flow from the developed area between Western Ave. North and

Farrington St. not serviced by storm sewer (Figure 5). Due to erosion and minor wash-out

observed in this area, this alternative would require armoring and stabilization of the flow path from

the developed area to the proposed beehive. The Alternative 2 beehive structure is positioned in a


low point along this ditch which will provide pooling around the inlet to maximize conveyance into

the TBI. To efficiently route flow from the developed area between Western Avenue North and

Farrington Sttreet (Subwatershed FC_11) to the proposed inlet, it may be necessary to construct

additional curb in the southeast corner of the parking lot discharging runoff from the developed area

to the ditch.

Modeling indicates that the proposed 3-foot beehive structure has sufficient capacity to convey

runoff from the developed area into the TBI. Additionally, the 12-inch inlet has sufficient capacity to

convey runoff generated down-gradient of the beehive inlet location into the TBI. As with

Alternative 1, runoff to the low-lying area is generally limited to its direct drainage area. Reductions

in flood depth, flood volume, and inundation area associated with this alternative are shown in Table

8.

Table 4 Alternative 2 Opinion of Cost

Bid Item Item Description Unit Estimated

Quantity

Unit Price Total

Extension

2.1 Mobilization/Demobilization L.S. 1 $1,500 $1,500

2.2 Beehive inlet EA 1 $1,500 $1,500

2.3 36" riser EA 1 $4,000 $4,000

2.4 Connect riser to TBI EA 1 $5,000 $5,000

2.5 Inlet channel armoring L.S. 1 $2,000 $2,000

2.6 Erosion control L.S. 1 $3,000 $3,000

2.7 Site Restoration L.S. 1 $1,000 $1,000

2.8 Contingency Approx. 30% L.S. 1 $5,500 $5,500

Total (Alternative 2) $23,500 *Contingency includes unforeseen construction costs that are not included in this conceptual -level opinion of cost.

3.3 Alternative 3 Rain Garden Upstream of Farrington Ave.

Construct a rain garden in the collector ditch corridor to provide water quality treatment and

reduce stormwater volume (Figure 5). The rain garden is sized to remain within the TBI easement

and to maintain a distance of 25 feet from the centerline of BNSFs railroad track. The existing TBI

easement will need to be reviewed and may need to be amended to provide adequate area for access

and repairs to the TBI if this alternative is to be implemented. This alternative assumes appropriate

soils for infiltration; however the rain garden could also be constructed as a filtration garden with an

underdrain discharging into TBI. County soils mapping suggests that this area is composed of

hydrologic soil group B soils that would be appropriate for infiltration practices. Site visits confirm

that this area is generally adequately drained; however, no soil borings have been taken.


The proposed rain garden has a footprint of over 3,000 ft2 (0.07 ac) and volume of 2,224 cubic feet,

which results in treatment 0.33- inches of runoff from the tributary impervious surfaces (1.85 ac).

The proposed rain garden assumes a 12-inch dead storage depth below the outlet, 3:1 side slopes, and

construction within the TBI storm sewer easement. Further expansion of the rain garden would

require extensive clearing of trees along the BNSF railroad.

Although a rain garden does provide volume reduction and attenuates peak flow from the developed

area, the berm identified on Figure 5 will continue to overtop into the localized flooding area during

the 10- and 100-year events. Reductions in flood depth, flood volume, and inundation area

associated with this alternative are shown in Table 8.

board of managers march 19, 2014 packet

Documents

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