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19 December 2012 Project Reference: 159-01 .Engineering Report for Multiple Dwelling Units (6) – 21 Streeter Avenue, West Mackay (Lot 18 on RP720085) Prepared for Johnny Thai c/- Cardno HRP

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Page 1: Prepared for Johnny Thai c/- Cardno HRP · Appendix C – Supporting Documentation & Calculations Appendix D – Sewer Reticulation Document Control Rev No Date Revision Details Author

19 December 2012 Project Reference: 159-01

.Engineering Report for Multiple Dwelling Units(6) – 21 Streeter Avenue, West Mackay (Lot 18

on RP720085)

Prepared for Johnny Thai c/- Cardno HRP

michellem
Received (Manual Date)
Page 2: Prepared for Johnny Thai c/- Cardno HRP · Appendix C – Supporting Documentation & Calculations Appendix D – Sewer Reticulation Document Control Rev No Date Revision Details Author

Lot 18 on RP720085

PAGE 2

1.  Introduction 3 

2.  Scope 3 

3.  Development Levels and Earthworks 3 

4.  Stormwater Drainage 4 4.1  Underground Drainage 4 4.2  Overland Flows 4 4.3  On-site Stormwater Detention 5 4.4  Stormwater Quality 5 

5.  Roadworks & Access 5 

6.  Water and Sewer Connections 6 6.1  Water 6 6.2  Sewer 7 

7.  Electrical and Telecommunications 7 

8.  Soil Erosion & Sediment Control 7 

9.  Conclusion 8 

Appendix A – Site Plan Appendix B – DTS Survey Appendix C – Supporting Documentation & Calculations Appendix D – Sewer Reticulation

Document Control

Rev No Date Revision Details Author Reviewer Approver

1 12/12/2012 Draft ADP GTS ADP

2 13/12/2012 Preliminary to Client for comment ADP

A 19/12/2012 Final ADP GTS ADP

Table of Contents

Page 3: Prepared for Johnny Thai c/- Cardno HRP · Appendix C – Supporting Documentation & Calculations Appendix D – Sewer Reticulation Document Control Rev No Date Revision Details Author

Lot 18 on RP720085

PAGE 3

1. Introduction

At the request of Johnny Thai, Porters Engineers provide the following Engineering Report in support of an application for multiple dwelling units (6). The property, zoned higher density residential, is currently described as Lot 18 on RP720085 or 21 Streeter Avenue, West Mackay. The Lot, approximately 926m2 currently contains a single dwelling. The proposed development use is for six (6) multiple dwelling units to be constructed generally in accordance with lavbl Design drawings DA-01 to DA-09 inclusive, dated November 2012. (Appendix A – Site Plan Information Only) A detail and level Survey by DTS Surveys has been completed for the site and is attached. (Appendix B)

2. Scope

Porters Engineers have been engaged to provide engineering services to consider and assess engineering aspects associated with the development, including:

Development Levels Layout & Driveway Access Stormwater Drainage Roadworks / Access Water Connection Sewer Connection Electrical and Telecommunications Services

General comments have also been provided for Soil Erosion & Sediment Control.

3. Development Levels and Earthworks

The existing site falls from the South-Eastern side boundary to the North-Western side at approximately 1 in 20. Refer to the attached Survey drawing (Appendix B) prepared by DTS, plan number N-061-A1 Rev B for further information. The existing surface levels vary and is typically around AHD 10.5m.The minimum required floor level for Mackay is the higher of;

300mm above the 100 year ARI flood level 300mm above the top of kerb 300mm above the crown of the road 225mm above ground level

RL 5.95m AHD (or RL 6.55m AHD within 100m of foreshore) for Mackay & Environs RL 5.80m AHD for Ball Bay/Halliday Bay/Seaforth RL 5.80m AHD for Midge Point RL 6.10m AHD for Sarina

Page 4: Prepared for Johnny Thai c/- Cardno HRP · Appendix C – Supporting Documentation & Calculations Appendix D – Sewer Reticulation Document Control Rev No Date Revision Details Author

Lot 18 on RP720085

PAGE 4

Assessment of these levels would form part of any future development approvals. Note DSTE levels are expected to be revised following completion of Mackay Region Storm Tide Study. (Note: The Lot is affected by Flooding and Inundation Overlay Code.) The DTS survey indicates;

Top of Kerb = RL 10.16 AHD Crown of Road = RL 10.42 AHD

Existing Building Design plans infer slab-on-ground construction and therefore site levels may have to be adjusted to achieve compliance with the above minimum floor level requirements where deemed habitable space. The elevation of the existing land where the expected building pad works are to be completed is greater than RL5.0m AHD and therefore is not subject to Acid Sulphate Soils (ASS).

4. Stormwater Drainage

The existing site has significant crossfall and therefore any new development must consider the impact to the adjacent neighbouring properties attributable to the new development works. New works will not adversely effect neighbouring properties. A stormwater drainage design will alleviate expected increased (developed) flows from site. A combination of stormwater detention and overland flow paths is proposed to meet stormwater requirements for both major and minor rainfall events in accordance with Mackay Regional Council Planning Scheme Policy No. 15.05 and in particular QUDM. Refer to Appendix C for Stormwater Concept Plan and Preliminary calculations.

4.1 Underground Drainage Current lavbl Design plans show roofing (to be designed in accordance with AS3500) falling towards the rear boundary for the majority with some minor roof catchment areas such as awnings and patios falling towards the front boundary. Roof water will be collected and conveyed to the underground drainage system from these downpipes via tanks to legal point of discharge, being newly constructed kerb adaptors in kerb and channel located in Streeter Avenue frontage. (in accordance with MRC Standard Drawing A3-3871) It is expected roof water tanks, switching or a trickle top-up system and associated first flush diversion will be provided for Queensland Development Code compliance and used in ‘grey’ water systems.

4.2 Overland Flows The current Q100 overland flows generally fall and drain from a ‘diagonal crest’ central to the site. The stormwater flow is directed to both the North-western corner and South-Western corners of the Lot.

Page 5: Prepared for Johnny Thai c/- Cardno HRP · Appendix C – Supporting Documentation & Calculations Appendix D – Sewer Reticulation Document Control Rev No Date Revision Details Author

Lot 18 on RP720085

PAGE 5

The grassed and hardstand areas will be graded and drained to allow free-draining of the site towards Streeter Avenue where possible.

4.3 On-site Stormwater Detention On-site Stormwater detention (OSD) will be provided to the new development so there is no adverse impact from any additional stormwater run-off from the developed site. Storm-water detention sizing in accordance with QUDM would be completed as part of the future development approvals process, or as prescribed in future Decision Notices by Mackay Regional Council. The existing site area of 926m2 contains a single dwelling. The proposed development generally consists of a building footprint of 546m2, 256m2 of hardstand area with the remaining areas open or landscaped. Preliminary calculations indicate detention tanks of approximately 2,500 Litre capacity with 50mm discharge outlet would be required per unit. This should be confirmed by detailed design calculations during stormwater system design. Given the building and site layout above ground rain tanks will be provided, outletting to legal point of discharge. In this instance kerb and channel at Streeter Avenue. New OSD must be maintained in accordance with an approved maintenance plan accepted by Mackay Regional Council and to their specific requirements.

4.4 Stormwater Quality The proposed development would require Solution R5 in accordance with MRC Engineering Design Guideline – “Deemed to comply solutions for Stormwater Quality Management”. Based on R5 solution a bio-retention size of 1.0% of the lot size for the development is required. Due to the small size (926m2) of the development, provision of rain tanks in Compliance with the QLD development code and OSD tanks, our professional opinion is that Stormwater Quality treatment is not warranted. A Stormwater drainage design as shown on Drawing C01 in Appendix C has been prepared based on above comments. In addition to this, and a future detailed design, a Soil Erosion & Sediment plan should be prepared to address adverse impacts on stormwater quality during construction phase. Roofwater, making up approximately 50% of the site, will be piped to on-site stormwater detention tanks prior to being discharged to the legal point of discharge at the kerb in Streeter Avenue. The existing natural falls on site will be maintained where possible to retain the existing hydrologic behaviour of the catchment.

5. Roadworks & Access

There is an existing invert crossing to the Lot along the frontage to Streeter Avenue. (Local Street) It is proposed that this entrance is demolished and a new concrete invert access, minimum 4.2m wide, be provided. Invert crossing details are to be in accordance with Mackay Regional Council guidelines and standard drawing (A3-773). Any damage to the existing

Page 6: Prepared for Johnny Thai c/- Cardno HRP · Appendix C – Supporting Documentation & Calculations Appendix D – Sewer Reticulation Document Control Rev No Date Revision Details Author

Lot 18 on RP720085

PAGE 6

kerbing from proposed works should be replaced with new and ‘made good’ in accordance with MRC Standard Drawings A3-865 & A2-500 respectively.

Photo 1: View towards existing access to site

6. Water and Sewer Connections

6.1 Water There is an existing Water Meter connection in the North-eastern corner of the development. There is an existing 100mm Water main service located along Streeter Avenue at the road frontage to the development. We propose this water main be utilised for future water service connection to the development. We would expect seven (7) meters be required, one (1) Master meter and six (6) individual sub-meters to service each Unit. Refer to Drawing C02 in Appendix C for proposed location. Water connections and metering are to be installed in accordance with Mackay Regional Council’s standard drawing detail A3-00840 & A3-04275 and engineering design guidelines. Any live connection work is to be completed by Mackay Water and Waste at the developer’s cost. Note: A Dial-Before-You-Dig (DBYD) request should be made prior to any works. Works may also require a Traffic Management Plan to be implemented. A preliminary search indicates underground cabling at the road frontage to the site.

Page 7: Prepared for Johnny Thai c/- Cardno HRP · Appendix C – Supporting Documentation & Calculations Appendix D – Sewer Reticulation Document Control Rev No Date Revision Details Author

Lot 18 on RP720085

PAGE 7

6.2 Sewer

An existing 225mm diameter sewer main graded at 1:250 extends diagonally across the rear of the Lot. Mackay Regional Council Services Search records indicate a house connection branch is extended from this main to the existing dwelling. (refer Appendix D for Sewer Reticulation Plan) The sewer main depth is approximately 1,200mm below surface level. The new development building footprint for the rear units is directly over the sewer main line. Given the age and depth of the existing sewer main, and size of the proposed development over the existing sewer, a new 225mm DICL sewer pipe is proposed to replace the existing main. The new sewer pipe is proposed to extend from the manhole located in the adjacent lot to 900mm past the proposed building footprint on the South-eastern side. Sewer details are generally in accordance with the details provided on the attached drawing C02 in Appendix C. Construction of services is to be in accordance with Mackay Regional Council standard drawing detail A3-04203 and engineering design guidelines. Any live connection works are to be completed by Mackay Water and Waste. Any future building works located on or adjacent to Mackay Regional Council Sewer assets is subject to a Building Over or Adjacent to Sewer application. Refer to Mackay Regional Council’s policy “Building Over or Adjacent to Sewers” for further information.

7. Electrical and Telecommunications

There is existing electrical and telecommunications infrastructure available external to the development and it is considered that this infrastructure will be adequate for connection of any future development subject to capacity checks from relevant service providers. Service Providers should be contacted to determine detailed design requirements. A DBYD search received during compilation of this report indicates there is existing underground cables located in the vicinity of the site with Ergon Energy, Powerlink, Telstra and Optus all indicating they have assets. Prior to any works a new Construction DBYD would be required and cables located by a certified contractor.

8. Soil Erosion & Sediment Control

During construction a Soil Erosion and Sediment Control plan should be provided in accordance with the Environmental Protection Act 1994 and State Planning Policy 4/10 – Healthy Waters. This is typically expected to include devices such as silt fencing, sand bagging and truck shaker grid. Stormwater pollution reduction from site should be in accordance with Best Practice Guidelines issued by Mackay Regional Council and Standard Drawing A3-3880 and A3-3881.

Page 8: Prepared for Johnny Thai c/- Cardno HRP · Appendix C – Supporting Documentation & Calculations Appendix D – Sewer Reticulation Document Control Rev No Date Revision Details Author

Lot 18 on RP720085

PAGE 8

9. Conclusion

Further development would be subject to the necessary development permits and approvals assessment by the regulating authority, Mackay Regional Council.

Page 9: Prepared for Johnny Thai c/- Cardno HRP · Appendix C – Supporting Documentation & Calculations Appendix D – Sewer Reticulation Document Control Rev No Date Revision Details Author

Appendix A

Site Plan

Page 10: Prepared for Johnny Thai c/- Cardno HRP · Appendix C – Supporting Documentation & Calculations Appendix D – Sewer Reticulation Document Control Rev No Date Revision Details Author
Page 11: Prepared for Johnny Thai c/- Cardno HRP · Appendix C – Supporting Documentation & Calculations Appendix D – Sewer Reticulation Document Control Rev No Date Revision Details Author

Appendix B

DTS Survey

Page 12: Prepared for Johnny Thai c/- Cardno HRP · Appendix C – Supporting Documentation & Calculations Appendix D – Sewer Reticulation Document Control Rev No Date Revision Details Author

9.92

9.91

10.75

10.41

10.65

10.94

9.80

9.94

9.72

10.79

10.72

9.92

10.6

3

10.64

10.67

10.74

10.69

10.53

10.56

10.7

4

10.25

10.16

10.15

10.36

10.20

10.06

9.58

10.18

10.45

10.58

10.25

10.38

10.54

10.49

10.39

10.59

10.70

10.5710.6010

.63

10.4510.74

10.71 10.72

10.76

10.65

10.76

10.65

10.66

10.75

10.62

10.63

10.66

10.64

10.59

10.49

10.58

10.18

10.70

10.60

10.7

3

10.7

4

10.67

10.42

10.75

10.81

10.82

10.80

9.80

9.75

9.91

10.76

10.79

10.43

10.789.

89

10.69

Cha

inw

ire F

ence

Cha

inw

ire F

ence

Chainwire Fence

Chainwire Fence

IL 8.562 225dia

Approximate Line Only

Approximate Line Only

BENCHMARKGI Nail in BitumenRL: 9.769

Gar

den

B

ed

Garden Bed

Lot 18RP 720085

Lot 19RP 721003

Lot 17RP 720085

Lot 4RP 707358

Lot 20SP 886043

Lot 3RP 707358

STREETER AVENUE

EMT A

RP 72

1003

EMT B

RP 72

1003

LOT

24

RP 72

1003

PATH

WAY

32°3

7' 3

6.29

6

119°36' 25.12

212°

37'

37.

618

302°37' 25.085

Grassed Surface

Grassed Surface

Grassed Surface

Concrete Kerb & Channel

Concrete Slab

Concrete Slab

Concrete Slab

Concrete DrivewayC

oncr

ete

Pat

h

Crown of Bitumen

Shed Shed

Verandah

VerandahTwo Storey Weatherboard Dwelling

Stairs

Roof Peak RL 16.47

Stairs

Eave

Eave

Two

Stor

ey B

rick

Dw

ellin

g

Two

Stor

ey W

eath

erbo

ard

Dw

ellin

g

B Boundary Distance 18/10/12 Real Property DescriptionLot 18 on RP 720085

Parish Howard County Carlisle

Client:

CPM- CPM 04/10/20121:100 N-061-A1M12042 B

21 Streeter Ave, Mackay

M12042SurveyorL Book Drawn DateScale Drawing No.Project No. RevF Book

Datum for Levels PM5160 RL 9.766 AHD

BSI

FS 520315ISO 9001

JAS‐ANZ

R

Detail and Level Survey

Civilcad File

Dimensions of subject Lot should be verified by Identification Survey

sdt urban planning, surveying& development

BrisbanePO Box 361 Paddington QLD 4064Ph: 07 3118 0600 [email protected]

MackayPO Box 11711, Mackay Caneland QLD 4740

Ph: 1300 278 [email protected]

HRP CardnoLegend

Tree Legend

Gro

up

of 5

Tre

es

He

igh

t of T

ree

8.0

m

Ra

dia

l Sp

rea

d o

f C

ano

py

3.0

m

Dia

. of

Tru

nk

0.2

m

Typ

e o

f T

ree

GM-0203085

TT =Tea TreeSB =Stringy BarkPN =Pine TreePA =Palm TreeOR =Ornamental Tree

CA =Camphor LaurelM =Mango TreeJ =JacarandaIB =IronbarkLE= Leopard TreeGM =Gum TreeFIG=Fig TreeSO=Silky Oak

Coding for TreesInspection OpeningPostSewerage MH

Tree

Gully Pit (Centre of Grate)

Water MeterValve

Telstra PitStormwater MH

Elect. Light PoleElectricity Pit

Electricity Box

GasFire HydrantElectricity Pole

Gully Pit (Backstone)Overhead Wires Comms Stormwater Edge Of Bit. Water Sewerage Electrical Gas

Fence

Bottom of Bank Top of Bank

Crown of Road

UTR =Unknown TreePO=Poinciana Tree

Typical Mountable Kerb

Field Shot Taken Here

Field Shot Taken HerePavement

Typical Box Kerb Typical Traffic Island Kerb

Field Shot Taken Here

N

Service Visible serviceSewerDrainageWaterElect.Comms.Gas

Field survey DBYD records Vacuum potholingCable/pipe locatorNo No Yes No NoNo No No No NoNo No Yes No NoNo No No No NoNo No No No NoNo No No No No

The underground services have been compiled from a combination of fieldsurveys, cable/pipe locator and "Dial Before You Dig" records as per table.

Notes

Invert levels and pipe sizes of hydraulics have been determined by field survey where ever possible. Whilst all care is taken to obtain accurate measurements, it should be noted that OH&S restricts entry to confined spaces. Where pipe details have been obtained from council records, the plan has been noted accordingly. The accuracy of service alignments shown on this plan may vary depending on the source of the data. The relevant authority and pot holing should always be undertaken to verify the exact position prior to construction.Whilst all care has been taken to represent the location of all underground services, further services may exist.

For accurate locations of boundaries, an Identification survey is recommended. These contours and levels do not represent the natural ground levels as defined by Cityplan 2000.Title boundaries were not marked at the time of survey and have been determined from the original survey plan dimensions only.

Rev DateAmendment

Page 13: Prepared for Johnny Thai c/- Cardno HRP · Appendix C – Supporting Documentation & Calculations Appendix D – Sewer Reticulation Document Control Rev No Date Revision Details Author

Appendix C

Supporting Documentation & Calculations

Page 14: Prepared for Johnny Thai c/- Cardno HRP · Appendix C – Supporting Documentation & Calculations Appendix D – Sewer Reticulation Document Control Rev No Date Revision Details Author

W W W

S S SS

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

W

OVERLAND FLOW PATH

SW PROPOSED ROOFWATER PIPE

LEGEND

W EXIST. WATER MAIN

PROPOSED SEWER MAINEXIST. SEWER MAINS

S

STORMWATER LAYOUT PLAN

C01

1:250

PRELIMINARYNOT FOR CONSTRUCTION

01159-01

21 STREETER AVENUEWEST MACKAY

JOHNNY THAI

01 13/12/12 PRELIMINARY -

REV.DRAWING NO.

ISSUE DATESCALE

PROJECT NO.SERIES NO.

DRAWING TITLECLIENTPROJECT

REV DATE DESCRIPTION APPROVED

PO BOX 11478, Mackay, QLD 4740

ph: (07) 4951 4818

m: 0412 918 328

[email protected]

Director

/ /Andrew Porter (RPEQ 8644)BE (Hons) MIE Aust CPEng

0 4 8 12m

SCALE 1:250 (A3)

WM

UNIT 1

LOCALIZED FILLING TO ENSURENO PONDING OCCURS (MAX GRADE 1 ON 500)

CONCRETE DRIVEWAY

UNIT 2UNIT 3

UNIT 4UNIT 5UNIT 6

2x100Ø ROOFWATER PIPE

100Ø ROOFWATER PIPE

100Ø ROOFWATER PIPE

100Ø ROOFWATER PIPE

100Ø ROOFWATER PIPE

2500L RAINWATER TANKREFER NOTE 1

NOTES:1. PROVIDE 2500L OSD TANK WITH A 50Ø

FREE FLOWING OUTLET TO EACH UNIT.CONNECT DIRECTLY TO 100Ø ROOF WATER PIPE

450X450 RKO PITWITH GRATED INLET

PROVIDE 2x KERB ADAPTORKERB IL 9.55

PROVIDE KERB ADAPTORPROVIDE KERB ADAPTOR

EXIST. KERB & CHANNEL

2500L RAINWATER TANKREFER NOTE 1

2500L RAINWATER TANKREFER NOTE 1

2500L RAINWATER TANKREFER NOTE 1

2500L RAINWATER TANKREFER NOTE 1

STREETER AVENUE

REPRESENTED AND OTHER SERVICES MAY EXIST ON SITE.

POSITIONS OF SERVICES SHOWN ARE GIVEN FOR GUIDANCE

THE POSITION OF ALL SERVICES ON SITE.IT IS THE RESPONSIBILITY OF THE CONTRACTOR TO VERIFY

ONLY. LOCATIONS AND/OR DEPTHS MAY NOT BE ACCURATELY

ALL LEVELS & CALCULATIONS ARE BASED OFF DETAIL SURVEY PROVIDED BY DTS

CH

ANG

E O

F G

RAD

E

Page 15: Prepared for Johnny Thai c/- Cardno HRP · Appendix C – Supporting Documentation & Calculations Appendix D – Sewer Reticulation Document Control Rev No Date Revision Details Author

SW PROPOSED ROOFWATER PIPE

LEGEND

W EXIST. WATER MAIN

PROPOSED SEWER MAINEXIST. SEWER MAINS

S

W W W

S S SS

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

SW

W

SEWERAGE & WATERLAYOUT PLAN

C02

1:250

PRELIMINARYNOT FOR CONSTRUCTION

01159-01

21 STREETER AVENUEWEST MACKAY

JOHNNY THAI

01 13/12/12 PRELIMINARY -

0 4 8 12m

SCALE 1:250 (A3)

REV.DRAWING NO.

ISSUE DATESCALE

PROJECT NO.SERIES NO.

DRAWING TITLECLIENTPROJECT

REV DATE DESCRIPTION APPROVED

PO BOX 11478, Mackay, QLD 4740

ph: (07) 4951 4818

m: 0412 918 328

[email protected]

Director

/ /Andrew Porter (RPEQ 8644)BE (Hons) MIE Aust CPEng

REPRESENTED AND OTHER SERVICES MAY EXIST ON SITE.

POSITIONS OF SERVICES SHOWN ARE GIVEN FOR GUIDANCE

THE POSITION OF ALL SERVICES ON SITE.IT IS THE RESPONSIBILITY OF THE CONTRACTOR TO VERIFY

ONLY. LOCATIONS AND/OR DEPTHS MAY NOT BE ACCURATELY

STREETER AVENUE

REPLACE EXIST. 225Ø SEWER MAIN WITH 225Ø DICL

FOOTING EXCLUSION ZONE

NEW HCB

NEW EZIPIT CONSTRUCTED OVER EXIST. SEWER

NEW HCB

NEW WATER SERVICE INCLUDING1/ MASTER METER & 6/ SMART METERS

WM

UNIT 1UNIT 2

UNIT 4UNIT 5UNIT 6

UNIT 3

EXIST. SEWER MANHOLETO REMAIN

EXIST. 100Ø WATER MAIN

ALL LEVELS & CALCULATIONS ARE BASED OFF DETAIL SURVEY PROVIDED BY DTS

HCB (1 ON 60 GRADE)

HCB (1 ON 60 GRADE)

650mm COVER

840mm COVER

Page 16: Prepared for Johnny Thai c/- Cardno HRP · Appendix C – Supporting Documentation & Calculations Appendix D – Sewer Reticulation Document Control Rev No Date Revision Details Author

Project

21 Streeter Avenue, West Mackay

Job Ref.

159-01

Section

Engineering Report Stage - Stormwater

Sheet no./rev.

1

Calc. by

ADP

Date

08/12/2012

Chk'd by

Date

App'd by

Date

Stormwater Detention Requirements in Accordance with QUDM & Mackay Regional Council Planning Scheme:

(All input items have been highlighted in orange, all output items highlighted in blue)

(All outputs are highlighted in bold font)

Design for a Storm Event:

(Determine ARI from QUDM & MRC Requirements)

Catchment Area Existing; Ae = 926 m2

Catchment Area Proposed; Ap = 926 m2

Figure 1: Site Arial Photo

Calculation of the Runoff Coefficients, Cy, for the design storm event: (from QUDM & BOM)

Fraction Impervious Existing; fie = 0.45

Fraction Impervious Proposed; fip = 0.85

1hr Rainfall Intensity for a 10 year ARI Existing; I10e = 80 mm/hr

1hr Rainfall Intensity for a 10 year ARI Proposed; I10p = 80 mm/hr

10 year C value Existing; C10 e= 0.79

10 year C value Proposed; C10p = 0.87

Frequency Factor, Fy for Design ARI Existing; Fye = 1.2

Frequency Factor, Fy for Design ARI Proposed; Fyp = 1.2

Existing; Cye =FyeC10e= 0.948;

Proposed; Cyp =FypC10p= 1.044; Cannot be greater than 1;

Page 17: Prepared for Johnny Thai c/- Cardno HRP · Appendix C – Supporting Documentation & Calculations Appendix D – Sewer Reticulation Document Control Rev No Date Revision Details Author

Project

21 Streeter Avenue, West Mackay

Job Ref.

159-01

Section

Engineering Report Stage - Stormwater

Sheet no./rev.

2

Calc. by

ADP

Date

08/12/2012

Chk'd by

Date

App'd by

Date

Time of Concentration, Tc, and Rainfall Intensity, I:

Time of Concentration Existing; Tce = 15 min

Time of Concentration Proposed; Tcp = 5 min

Rainfall Intensity Existing; Ie = 239 mm/hr

Rainfall Intensty Proposed; Ip = 358 mm/hr

Design Discharges, Q:

Existing; Qe =CyeIeAe= 0.058 m3/s;

Proposed; Qp =(Cyp/CypIpAp= 0.092 m3/s;

Additional flow from proposed development; Qp – Qe = 0.034 m3/s

Detention Storage, Vs:

Detention Storage outflow; Qo = Qe = 0.058 m3/s

Detention storage inflow; Qi = Qp = 0.092 m3/s

Reduction Ratio; r = (Qi-Qo) / Qi = 0.367;

If r<0.25 use Boyd, if 0.25<r<0.45 use Basha, if 0.45<r<0.6 use Carroll, or if r>0.6 use Culp)

Vi=(4TcpQi)/3 = 36.834 m3;

Vs=Vi (r(2+r)/3) = 10.670 m3;

Therefore minimum detention tank volume storage requirements per unit; Volume =(Vs/6)=1778.294 l

Page 18: Prepared for Johnny Thai c/- Cardno HRP · Appendix C – Supporting Documentation & Calculations Appendix D – Sewer Reticulation Document Control Rev No Date Revision Details Author

Appendix D

Sewer Reticulation

Page 19: Prepared for Johnny Thai c/- Cardno HRP · Appendix C – Supporting Documentation & Calculations Appendix D – Sewer Reticulation Document Control Rev No Date Revision Details Author
Page 20: Prepared for Johnny Thai c/- Cardno HRP · Appendix C – Supporting Documentation & Calculations Appendix D – Sewer Reticulation Document Control Rev No Date Revision Details Author

UNIT 3 UNIT 2UNIT 1

FFL10.6 FFL10.6 FFL10.8

119D36'

25.12M

32

D3

7'

36

.2

96

M

21

2D

37

'

37

.6

18

M

STREETER AVENUE

+10.72

+9.92

10.0

10.5

PP

GATE

GATE

GATE

PATIO

PATIO

PATIO

PATH

PATH

PATH

VISITOR

VISITOR

DRIVEWAY

DRIVEWAY

dryingdrying

drying

PE

DE

ST

RIA

N P

AT

H

(5)LEP PCA

(1)SYZ AUC

(1)RAN NAT

(5)LOM RUB

(3)SYZ AUC

(7)BAE MTT

(7)BAE MTT

(3)SYZ AUC

(1)RAN NAT

(1)FRA GRI

(1)GRE BLY

(1)GRE BLY

(1)GRE BLY

(1)FRA GRI

(5)SYZ AUC

(7)MEL PIL

(7)LOM RUB

(7)GRE TAM

(8)GRE TAM

(5)LEP PCA

(5)LEP PCA

(3)LOM RUB

(4)LOM RUB

(6)GRE TAM

(6)MEL PIL

(8)GRE TAM

(3)LOM RUB

(5)LEP PCA

(1)SYZ AUC

(4)LOM RUB

CLIENT:

DRAWING TITLE

December 12

ALP1

PROJECT DETAILS:

1212

Scale: 1:100@A3

LANDSCAPE PLAN

Page 21: Prepared for Johnny Thai c/- Cardno HRP · Appendix C – Supporting Documentation & Calculations Appendix D – Sewer Reticulation Document Control Rev No Date Revision Details Author

UNIT 6UNIT 5

UNIT 4

FFL10.7 FFL10.7 FFL10.7

PATIO

PATIO

PATIO

10.0

10.5

SEWER MH

302D37

'25.085M

+10.94

+9.72

VISITOR

VISITOR

VISITOR

DRIVEWAY

drying

drying

drying

PE

DE

ST

RIA

N P

AT

H

(5)LEP PCA

(5)BAE MTT

(2)CAL WIF

(5)LEP PCA

(1)RAN NAT

(1)SYZ AUC

(12)EVO PIL

(5)MEL PIL

(9)LEP PCA

(1)FRA GRI

(1)GRE NEK

(8)EVO PIL

(1)GRE NEK

(6)BAE MTT (6)BAE MTT

(1)RAN NAT

(1)RAN NAT

(7)LEP PCA

(4)MEL PIL

(2)GRE NEK

(1)FRA GRI

(11)EVO PIL

(9)BAE MTT

(1)GRE NEK

(1)RAN NAT

(4)LOM RUB

13.0

TURF AREAS

FENCE LINES

PATHS

CLIENT:

DRAWING TITLE

December 12

ALP2

PROJECT DETAILS:

1212

Scale: 1:100@A3

LANDSCAPE PLAN

Page 22: Prepared for Johnny Thai c/- Cardno HRP · Appendix C – Supporting Documentation & Calculations Appendix D – Sewer Reticulation Document Control Rev No Date Revision Details Author

TREES CODE BOTANICAL NAME / COMMON NAME CONT QTY

FRA GRI FRAXINUS GRIFFITHII / GRIFFITH ASH 45L 4

GRE BLY GREVILLEA BAILEYANA / GREVILLEA 45L 3

RAN NAT RANDIA FITZALANII / NATIVE GARDENIA 45L 6

SHRUBS BOTANICAL NAME / COMMON NAME CONT QTYBAE MTT BAECKEA VIRGATA `MT TOZER` / MT TOZER 200MM 40CAL WIF CALLISTEMON X `WILDFIRE` / WILDFIRE 140MM 2EVO PIL EVOLVULUS PILOSUS / SHAGGY DWARF MORNING-GLORY 140MM 31GRE NEK GREVILLEA X ``NED KELLY`` / NED KELLY 200MM 5LOM RUB LOMANDRA CONFERTIFOLIA RUBIGINOSA `CRACKERJACK` / MAT RUSH 140MM 26MEL PIL MELALEUCA THYMIFOLIA `PINK LACE` / HONEY-MYRTLE 140MM 22SYZ AUC SYZYGIUM AUSTRALE `AUSSIE COMPACT` / LILLY PILLY 200MM 13

GROUNDCOVER BOTANICAL NAME / COMMON NAME CONT QTYGRE TAM GREVILLEA LANIGERA `MT. TAMBORITHA` / MT. TAMBORITHA WOOLLY GREVILLEA 140MM 29LEP PCA LEPTOSPERMUM SCOPARIUM `PINK CASCADE` / PINK CASCADE 140MM 41

PLANT SCHEDULE

CLIENT:

DRAWING TITLE

December 12

ALP3

PROJECT DETAILS:

1212