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.

WHOLE OF LAND PLAN:

DRAINAGE MANAGEMENT PLAN

CAULFIELD VILLAGE

PROJECT REF: 2995

Caulfield Village:

WHOLE OF LAND PLAN:

DRAINAGE MANAGEMENT PLAN PROJECT REF: 2995

2995- Civil DMP Report 2

+

Prepared for BPG Caulfield Village Pty Ltd

Prepared by Mark Rimmington

Project Engineer Khanh Dang

Project Director Peter Hindmarch

DOCUMENT REVISION STATUS

Issue Revision Issue Date Issued By

Revised Draft P13 6th Nov 15 MR

Revised Draft P12 30th Oct 15 MR

Revised Draft P11 16th Oct t 15 MR

Disclaimer

Information in this report is current as of the issue date. Reasonable skills and care has been taken in the preparation of this report. WSP Structures Pty. Ltd.

accepts no liability for loss and damages incurred as a result of reliance placed upon its content.

The mention of any company, product or process in this report does not constitute or imply endorsement by WSP Structures Pty. Ltd.

Caulfield Village:

WHOLE OF LAND PLAN:

DRAINAGE MANAGEMENT PLAN PROJECT REF: 2995

2995- Civil DMP Report 3

TABLE OF CONTENTS

Disclaimer ................................................................................................................................................................ 2

1. INTRODUCTION ............................................................................................................................................ 4

2. PURPOSE ........................................................................................................................................................ 5

3. EXISTING CONDITIONS .............................................................................................................................. 5

4. DRAINAGE ...................................................................................................................................................... 5

4.1 Council requirements ............................................................................................................................. 5

4.2 Drainage Method and Detention System ............................................................................................ 6

4.3 Drainage Management .......................................................................................................................... 7

4.4 Water Sensitive Urban Design (WSUD) .............................................................................................. 7

4.5 Ground Water .......................................................................................................................................... 7

4.6 Upgrading of the existing drainage infrastructure .............................................................................. 8

4.7 Flood levels .............................................................................................................................................. 9

5. CONCLUSION .............................................................................................................................................. 12

Appendix A: Whole of Land Catchment Plan................................................................................................... 13

Appendix B: MUSIC Results ............................................................................................................................. 16

Appendix C: Melbourne Water Flood information Letters ............................................................................. 19

Appendix D: Legal Points of Discharge Calculations ........................................................................................ 22

Appendix E: Ground Water Correspondence .................................................................................................. 29

CAULFIELD VILLAGE:

WHOLE OF LAND PLAN:

DRAINAGE MANAGEMENT PLAN PROJECT REF: 2995

2995- Civil DMP Report 4

1. INTRODUCTION

WSP Structures has been engaged by Reshape Development to develop a Drainage Management Plan

for the proposed mixed use and residential development project known as Caulfield Village. The whole

of land site is located north of Caulfield Racecourse and bounded by Station Street, Kambrook Road,

and Normanby Road.

A site layout, showing the general building, path ways and street layout as provided by ARM architects

forms the basis for this proposal which consists of three precincts as follows:

• Residential Precinct: The first precinct for development which is under construction.

• Mixed Use Precinct: The second precinct is a mixed neighbourhood comprising retail, leisure,

commercial and residential accommodation.

• Smith St Precinct: The third precinct will provide for leisure, commercial, service retail and

residential accommodation.

Pre-lodgement engagement with Council has enabled definition and agreement around the hierarchy

and extent of response required for the Initial Development Plan. Accordingly, we have provided a

Drainage Management Plan for this Initial Development Plan via two components being:

1. A Whole of Land Plan: Drainage Management Plan

2. Drainage Plan For Detailed Development Proposal

This report comprises the Whole of Land Drainage Management Plan

Figure 1: Aerial photo of proposed site

DEVELOPMENT BOUNDARY

(‘Whole of Land’)

CAULFIELD VILLAGE:

WHOLE OF LAND PLAN: DRAINAGE

MANAGEMENT PLAN

PROJECT REF: 2995

2995- Civil DMP Report 5

2. PURPOSE

The purpose of this report is to provide a “high level” study of the existing authority drainage infrastructure

network for the Whole of Land development, and potential impacts on the current council drainage

infrastructure.

The report will also assess compliance with “Schedule 2 to The Priority Development Zone”. Specifically,

section 6 requires a Drainage Management Plan (DMP) that provides:

• A Drainage system of a design that ensures that the quantity of stormwater discharged from the

site is appropriately managed.

• The incorporation of the water sensitive urban design principles that address the quality of

stormwater leaving the site and entering the local drainage system.

• An outline of the ongoing management arrangements for the internal drainage and water sensitive

urban design elements.

3. EXISTING CONDITIONS

The proposed development is located just north of the Caulfield Race Course and is bounded by Station

Street, Kambrook Road, and Normanby Road. The majority of the existing site is undeveloped grassed

area which is generally used for car parking. A smaller portion of the site bounded by Station Street,

Smith Street and Normanby Road is currently an asphalted car park and Precinct 1, bounded by

Kambrook Road and Bond Street is under construction.

The total site is approximately 49,338m2 for the three precincts, which does not include the road reserves.

The site level and feature survey indicates that the approximate levels at the streets adjacent to the site

are:

• Kambrook Road falls from South at R.L.43.70 to North R.L.43.30

• Bond Street falls from South R.L.45.70 to North at R.L.43.50

• Station Street falls from the middle R.L.50.70 to the West at R.L.44.40 and to the East at

R.L.48.50

• Normanby Road falls from the South at R.L.48.50 to the North at R.L.43.50

4. DRAINAGE

The Responsible Authority for the drainage infrastructure at the proposed development is the Glen Eira

City Council (GECC).

4.1 Council requirements

The Legal Point of Discharge (LPD) of this development was discussed with GECC engineering staff, Mr

Salim Murtaza, Mr Adbul Wazeer, Mr Paul Samaratunge and Winward Civil at a meeting held on the 7th

of March 2013, at Council premises. Council has granted ‘in principle’ approval for multiple stormwater

discharge points across the development due to the scale of the development and configuration of the

existing council stormwater drainage network.

Caulfield Village:

WHOLE OF LAND PLAN:

DRAINAGE MANAGEMENT PLAN PROJECT REF: 2995

2995- Civil DMP Report 6

The engineering conditions stipulated by GECC are as follows:

• The discharge rate from the site is to be limited to the ‘1 in 10’ year ARI.

• Detention storage volumes are to be designed for the ‘1 in 10’ year ARI.

• Time of concentration was set at 5 minutes (min) plus 1 m/s back into our site

• The rational method was to be used in calculating the existing discharge rates

• Runoff coefficients for existing grass land was given as 0.2

• The overland flow and depths are to be in accordance with Melbourne Water’s requirements

floodway safety criteria for maximum velocity of 1.5m/s, depth of 0.35m and the depth x velocity

< 0.35m2/s

• Water Sensitive Urban Design (WSUD) initiatives are to be implemented for the total

development. The Council defined the following minimum performance targets to be achieved by

WSUD initiatives:

o Total suspended Solid 80%

o Total Phosphorus 45%

o Total Nitrogen 45%

We confirm that all design work and modelling has adopted these requirements.

4.2 Drainage Method and Detention System

The total area (Whole of Land) will be developed in three phases relative to the three precincts as defined

in Section 1.

The development proposal generally assumes delivery of several multi storey buildings built over

proposed basement car parks in the first two precincts. Therefore, a run-off coefficient value of 1.0 has

been applied to calculate the discharge flow rates.

The assumed ground floor design restricts the existing overland flow path condition. Therefore the

detention systems have been designed to cater for up to ‘1 in 100’ ARI storm event.

Tanks have been designed for ‘1 in 20’ ARI storm with the remainder to be detained on the surface of

the lower basement car park, except for stage one of the residential precinct in which the tank has been

designed for a ‘1 in 100’ ARI storm.

Separate Legal Points of Discharge (LPD) and detention tanks will be applied to each stage of the

development.

The LPD discharge flow rates and the detention tank storage volumes for the whole development are

expressed in the table below.

Caulfield Village:

WHOLE OF LAND PLAN:

DRAINAGE MANAGEMENT PLAN PROJECT REF: 2995

2995- Civil DMP Report 7

Precinct Stage Discharge Rate:10 Years

(l/s)

Detention Tank Volume (m3)

Discharge location

Residential 1 26 170 Bond street via new 300ø drain (pit 9)

Residential 2 25 160 Redan Road existing 900ø via new

300ø drain (pit 2)

Residential 3 28 185 Bond street via new 300ø drain (pit 4)

Mixed use 4.5 & 6 70 445 Into the ex 675ø in Heywood St (pit 7)

Mixed use 7 & 8 64 400 Normanby Road via new 600ø across

street into the ex. 900ø (Pit 18)

Smith St 9 25 110 Into the proposed new street “The

Boulevard” drainage system (pit 20)

Smith St 10 39 160 Into the proposed new street “The

Boulevard” drainage system (pit 21)

Table 1: Discharge Rates and Detention Volumes for each stage.

4.3 Drainage Management

A Body Corporate will be formed that will be responsible for the maintenance and management of the

internal stormwater system before the stormwater discharges into council’s drainage infrastructure.

Regular maintenance activities undertaken on behalf of the Body Corporate will ensure that all internal

stormwater assets such as the pumping system, detention tanks, rainwater tanks and pits are operating

to their maximum efficiency to guarantee performance objectives are met.

4.4 Water Sensitive Urban Design (WSUD)

At conceptual design stage, yield studies have been completed and generic WSUD design principles

have been inputted into a Model for Urban Stormwater Improvement Conceptualisation (MUSIC) model

assuming the following:

• Rainwater tanks will capture runoff from building roofs for storage for reuse.

• Water reuse will be used for:

o 1. Irrigation of the garden areas

o 2. Toilet flushing in some of the buildings on site.

• Detention tanks will hold and release the rainwater at the permissible rate to the Councils drains.

Preliminary results, attached as Appendix B, show that minimum WSUD performance targets stipulated

by Council for the Whole of Land can be achieved. The WSUD scheme and calculations will be

remodelled and submitted to Council for verification as part of each applicable development plan

application as the design develops further.

4.5 Ground Water

A supplementary geotechnical investigation report provided by Golder Associates (Ref No. 137612021-

010-L-Rev 0) advised that ground water at inflow rates of up to 2 l/s is present for each proposed precinct

site. Alliance EPM assessed the quality of this ground water and advised that the “discharge of

groundwater to stormwater is not an issue of environmental concern”.

Caulfield Village:

WHOLE OF LAND PLAN:

DRAINAGE MANAGEMENT PLAN PROJECT REF: 2995

2995- Civil DMP Report 8

This information was submitted to Council along with a request for their approval to discharge ground

water into the Council drainage system, refer appendix E for a copy of this information.

Council gave permission to discharge the ground water from the site into the Council drainage system

subject to the flow rate being limited to a permissible flow rate nominated by Council.

Accordingly, the ground water will be collected by a number of strip drains along the perimeter walls and

agriculture drains under the basement slab which will then be directed into the detention tanks on site

prior to discharging to the Council drainage system at the permissible flow rate.

4.6 Upgrading of the existing drainage infrastructure

A full feature and level survey was carried out specifically for this development so that we could check

the capacity of the existing drainage infrastructure. The Capacity has been evaluated based on the invert

levels and pipe sizes from the relevant levels obtained from this feature survey information and site visits.

Catchment areas with a new coefficient of run-off have been used to calculate the required capacity of

the infrastructure drain, which was then compared with the existing condition. Based on the assessment

of the pipe capacities between the existing and required, some of the existing infrastructure pipes are

required to be up-graded to provide sufficient capacity for the proposed condition. For reference, the

applicable proposed catchment plan is attached as Appendix A of this report

.

Caulfield Village:

WHOLE OF LAND PLAN:

DRAINAGE MANAGEMENT PLAN PROJECT REF: 2995

2995- Civil DMP Report 9

Figure 2: Existing Council Drainage Network

Existing drainage pipes that will require upgrade are shown on the drainage management plan being

Drawing 2995 C003: Whole of Land Plan: Drainage Management Plan indicates;

• Existing drainage

• Proposed Upgrades to existing drainage; and

• Proposed new drainage.

• Legal points of discharge

A full size drawing accompanies this report and should be read in conjunction with Table 2, which

indicates the proposed staging of existing drainage system upgrades during the construction of the

proposed development.

There are also other areas, such as new roads, that currently do not have any associated drainage

infrastructure. Therefore, proposed pipe sizes have been nominated for these drains and indicated on

the drainage management plan.

Pit Numbers Catchment Total Catchment Existing Pipe Size

Upgrade Pipe To

Upgrade To Take Place

during

14 - 10 1 1 225ø 300ø Bond Street

Upgrade

10 - 6 2 1, 2 & Stage 1 300ø 375ø Bond Street

Upgrade

6 - 5 4 1, 2, 3, 4, Stage 1

& Stage 5 675ø - -

5 - 3 5 1, 2, 3, 4, 5,

Stages 1, Stage 2 & Stage 5

675ø - -

22 - 23 7 7 375ø &

600 x 150 Box Culvert

450ø During Smith

Street Upgrade

Table 2: Showing The Existing Drainage Networks That Will Require Upgrading.

4.7 Flood levels

Melbourne Water has confirmed that the development area is not subject to any flooding from Melbourne

Water drainage system. (Refer letters as per Appendix C).

GECC has confirmed that there are certain areas subject to inundation from the local overland flow on

the road reserve in larger storm events, (refer to Fig. 3). The plan indicates the affected areas are along

Kambrook Road and Redan Road on the western side of the Residential Precinct.

As discussed in the Cardno’s Hydraulic Report CG150215 Cardno have carried out an additional flood

map for precinct 2 & 3 in which we have copied the flood map and flood levels from this report shown in

figure 4. As stated in Cardno’s report “ As per standard engineering practice, the finished floor level of

the buildings is to be a minimum of 300mm above the 1 in 100 year ARI flood level”

Caulfield Village:

WHOLE OF LAND PLAN:

DRAINAGE MANAGEMENT PLAN PROJECT REF: 2995

2995- Civil DMP Report 10

Figure 3: Council’s ‘1 In 100’ ARI flood map

Caulfield Village:

WHOLE OF LAND PLAN:

DRAINAGE MANAGEMENT PLAN PROJECT REF: 2995

2995- Civil DMP Report 11

Figure 4: Cardno’s ‘1 In 100’ ARI flood map (for Precinct 2 and 3 only)

Caulfield Village:

WHOLE OF LAND PLAN:

DRAINAGE MANAGEMENT PLAN PROJECT REF: 2995

2995- Civil DMP Report 12

5. CONCLUSION

This report and appendices provides a conceptual design outline for the ongoing management

arrangements for the internal drainage and Water Sensitive Urban Design elements for the Whole of

Land plan. Details will be reviewed and updated accordingly as the design develops further. These details

will be addressed in the applicable Development Plan.

Accordingly, based on the results of these investigations, the proposed development meets the

requirements as stipulated in Section 6 in Schedule 2 of The Priority Development Zone for the following

reasons:

• The drainage system design ensures that the quantity of stormwater discharged from the site is

appropriately managed.

• The proposed Water Sensitive Urban Design (WSUD) measures to be incorporated into the

drainage design will ensure that the quality of stormwater discharge into Council’s drainage

infrastructure will comply with the council’s minimum WSUD performance targets.

• Following evaluation of the existing drainage infrastructure against available information, the DMP

demonstrates that proposed upgrades should have sufficient capacity to meet Council’s

requirements.

If further information is required, please feel free to contact the author.

Caulfield Village:

WHOLE OF LAND PLAN:

DRAINAGE MANAGEMENT PLAN PROJECT REF: 2995

2995- Civil DMP Report 13

Appendix A: Whole of Land Catchment Plan

Figure 5: Whole of Land Catchment Plan

Caulfield Village:

WHOLE OF LAND PLAN:

DRAINAGE MANAGEMENT PLAN PROJECT REF: 2995

2995- Civil DMP Report 14

Figure 5: Normanby Road Catchment Plan

Caulfield Village:

WHOLE OF LAND PLAN:

DRAINAGE MANAGEMENT PLAN PROJECT REF: 2995

2995- Civil DMP Report 15

Figure 6: Redan Road Catchment Plan

Caulfield Village:

WHOLE OF LAND PLAN:

DRAINAGE MANAGEMENT PLAN PROJECT REF: 2995

2995- Civil DMP Report 16

Appendix B: MUSIC Results

Figure 7: Precinct 1 Music Results

Caulfield Village:

WHOLE OF LAND PLAN:

DRAINAGE MANAGEMENT PLAN PROJECT REF: 2995

2995- Civil DMP Report 17

Figure 8: Precinct 2 for stage 4, 5 and 6 Music Results

Caulfield Village:

WHOLE OF LAND PLAN:

DRAINAGE MANAGEMENT PLAN PROJECT REF: 2995

2995- Civil DMP Report 18

Figure 9: Precinct 3 Music Results

Caulfield Village:

WHOLE OF LAND PLAN:

DRAINAGE MANAGEMENT PLAN PROJECT REF: 2995

2995- Civil DMP Report 19

Appendix C: Melbourne Water Flood information Letters

Figure 10: MW Letter 1

Caulfield Village:

WHOLE OF LAND PLAN:

DRAINAGE MANAGEMENT PLAN PROJECT REF: 2995

2995- Civil DMP Report 20

Figure 11: MW Letter 2

Caulfield Village:

WHOLE OF LAND PLAN:

DRAINAGE MANAGEMENT PLAN PROJECT REF: 2995

2995- Civil DMP Report 21

Figure 12: MW Letter 3

Caulfield Village:

WHOLE OF LAND PLAN:

DRAINAGE MANAGEMENT PLAN PROJECT REF: 2995

2995- Civil DMP Report 22

Appendix D: Legal Points of Discharge Calculations

Figure 13: Precinct 1 Stage 1

Caulfield Village:

WHOLE OF LAND PLAN:

DRAINAGE MANAGEMENT PLAN PROJECT REF: 2995

2995- Civil DMP Report 23

Figure 14: Precinct 1 Stage 2

Caulfield Village:

WHOLE OF LAND PLAN:

DRAINAGE MANAGEMENT PLAN PROJECT REF: 2995

2995- Civil DMP Report 24

Figure 15: Precinct 1 Stage 3

Caulfield Village:

WHOLE OF LAND PLAN:

DRAINAGE MANAGEMENT PLAN PROJECT REF: 2995

2995- Civil DMP Report 25

Figure 16: Precinct 2 Stage 4 , 5 & 6

Caulfield Village:

WHOLE OF LAND PLAN:

DRAINAGE MANAGEMENT PLAN PROJECT REF: 2995

2995- Civil DMP Report 26

Figure 17: Precinct 2 Stage 7 & 8

Caulfield Village:

WHOLE OF LAND PLAN:

DRAINAGE MANAGEMENT PLAN PROJECT REF: 2995

2995- Civil DMP Report 27

Figure 18: Precinct 3 Stage 9

Caulfield Village:

WHOLE OF LAND PLAN:

DRAINAGE MANAGEMENT PLAN PROJECT REF: 2995

2995- Civil DMP Report 28

Figure 19: Precinct 3 Stage 10

Caulfield Village:

WHOLE OF LAND PLAN:

DRAINAGE MANAGEMENT PLAN PROJECT REF: 2995

2995- Civil DMP Report 29

Appendix E: Ground Water Correspondence

Figure 20: Councils Response to CDA050

Caulfield Village:

WHOLE OF LAND PLAN:

DRAINAGE MANAGEMENT PLAN PROJECT REF: 2995

2995- Civil DMP Report 30

Figure 21: Winwards CDA050

Caulfield Village:

WHOLE OF LAND PLAN:

DRAINAGE MANAGEMENT PLAN PROJECT REF: 2995

2995- Civil DMP Report 31

Figure 22: Alliance EPM Letter

UNCLASSIFIEDPIT

DRAINAGEPIT

TRAMWAYPOLE

TRAMWAY

POLE

TRAMWAYPOLE

TRAMWAYPOLE

TRAMWAYPOLE

TRAMWAYPOLE

TRAMWAYPOLE

TRAMWAYPOLES

TRAMWAYPOLE

CONSTRUCTIONSITE

OPEN LAND(DERELICT)

CAR PORTSLOPINGG.I ROOF

SLOPINGG.I ROOF

SLOPINGG.I ROOF

PITCHEDTILE ROOF

GI SHEDS/

OUTBUILDINGS

GI SHEDS/

OUTBUILDINGS

GI SHEDS/

OUTBUILDINGS

GI SHEDS/

OUTBUILDINGS

GI SHED

GRASSEDYARD

GRASSEDYARD

GI SHED

GI SHED

GI SHED

GI SHED

GI SHED

GI SHED

BRICK BUILDING

PITCHED G.I ROOF

BRICK BUILDING

PITCHED G.I ROOF

GRASSEDYARD

GRASSEDYARD

GRASSEDYARD

GRASSEDYARD

GRASSEDYARD

GRASSEDYARD

GRASSEDYARD

GRASSEDYARD

UNCLASSIFIEDPIT

TRAMWAYPOLE

TRAMWAYPOLE

TRAMWAYPOLES

ROLL

ERDO

OR

FIBROSHED

GRASSEDYARD

SHED

SHED

COURTYARD

COURTYARD

COURTYARD

COURTYARD

BINSTORE

TRAMWAY &

LIGHT POLE

SHELTER

DRAINAGE PIT

DRAINAGE PT

UNCLASSIFIED

PIT

SIDE ENTRY PIT

DR

AIN

AGE

PIT

DRAINAGE PIT

43.7

1

43.88

44.1

944

.15

44.09

SIGN

SIGN

SIGN

45.26

SIDEENTRYPITS

Bore

hole

45.43

48.02CL

45.90

45.41

45.55

45.67

45.71

45.36

45.37

45.34

45.25

45.13

45.75

44.59

44.61

45.70

45.66

44.33

48.71

45.47

46.00

GRATED PIT

SID

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GRATED PITS

SIDE ENTRY PIT

GRATED PIT

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PIT

SEWERPIT

SEWERPIT

SEWERPITSEWER

PIT

50.96

RAIL

50.89

RAIL

50.89

RAIL

GASMARKERPOST

GASMARKERPOST

GASMARKERPOST

50.84

RAIL

50.91

RAIL

50.89

RAIL

50.98

RAIL

50.98

RAIL

Client Name & Logo Project

All rights reserved.COPYRIGHT

Rev. Date Revision By Chk.North Point Drawing Date Scale

Drawn Chk.

Job No. Drawing No. Revision

SJB Architects

2995

Rev. Date Revision By Chk.

These drawings, plans and specifications and the copyright therein are the propertyof Winward Civil and must not be used, reproduced or copied wholly or in partwithout the written permission of Winward Civil.

StructuresP1 -

NOT FOR CONSTRUCTION

PRELIMINARYPRELIMINARY

C003

MAY_2013

M.R K.D

P13

WHOLE OF LAND PLAN:DRAINAGE MANAGEMENT PLAN

A0@1:500

WHOLE OF LAND PLAN: DRAINAGE MANAGEMENT PLANP1 13/05/13 FOR TEAM REVIEW KDP2 15/05/13 DRAFT ISSUE KDP3 21/05/13 DRAFT ISSUE KDP4 24/05/13 FINAL FOR SUBMISSION KDP5 30/05/13 FINAL FOR SUBMISSION KDP6 14/06/13 FINAL FOR SUBMISSION KDP7 18/07/13 FINAL FOR SUBMISSION KD

CAULFIELD VILLAGEKAMBROOK ROADCAULFIELDP8 10/10/14 FINAL FOR SUBMISSION MR

P9 16/01/15 FINAL FOR SUBMISSION (COUNCIL COMMENTS) MRP10 21/01/15 FINAL FOR SUBMISSION (COUNCIL COMMENTS) MRP11 02/11/15 SUBMISSION FOR PRECINCT 2 APPLICATION MRP12 06/11/15 SUBMISSION FOR PRECINCT 2 APPLICATION MR

P13 11/11/15 SUBMISSION FOR PRECINCT 2 APPLICATION MR