Appendix N - City of Sydney€¦ · Table 2 Munni Flood Alleviation – WSUD Synergies WSUD Synergies # Name Description Precinct OSD Redevelopment (On Site Detention) OSD1 Everleigh

GHD | Report for City of Sydney- Draft WSUD & Stormwater Infrastructure Report | 104

Appendix N Flood alleviation opportunities

Table 1 Munni Flooding Issues

# FloodingLocation

Flooding Issue SQQS Upgrade WSUD Synergies

Precinct

1 Alexander Street Branch

1.1 Newton Lane Overland flows collect in a sag and eventually spill intoneighbouring residential properties on Allen Avenue,Newton Lane, Brandling Street, Renwick Street andJennings Street. Lack of downstream capacity stops thesag from draining adequately.

OSD1, OSD2,OSD3

2 MacDonaldtown Erskineville Branch

2.1 Burren Street Minor sag points along Burren, Charles, John andSeptimus Streets, no private property flooding.

Nil

2.2 Park Street Overland flows collect in a sag and eventually spill intoneighbouring residential properties on Park St, Ada Streetand Park Lane. Lack of downstream capacity stops thesag from draining adequately.

2,500m3 of storage in Solander Park wouldreduce downstream overland flows from 15m3/s to9m3/s in the 1% event.

OSD1, RB1

2.3 Copeland Street Overflows from Park Street and Newton Lane flood areascollect in a sag, accentuated by the wall surroundingadjacent Erskineville Oval.

7,000m3 of flood storage in Harry Noble Reservewould reduce downstream overland flows from30m3/s to 10m3/s in the 1% event.

All OSD, RB1,RB2

2.4 Ashmore Street Flows from Copeland St pass through Harry NobleReserve and pond in Ashmore Street flooding residentialhousing.

30,000m3 of flood storage in Ashmore Precinctwould reduce downstream overland flows from40m3 to 5m3/s (assuming Solander Park andHarry Noble Reserve options are implemented).

All OSD, All RB

3 Main Channel 74 Branch

3.1 MacDonaldStreet

Overland flows pond in MacDonald Street and railwayunderpass before overflowing to a low point in Eve Street.Some residential and commercial properties flooded.

Increase road reserve detention volume to8,300m3 to reduce overland flows entering EveStreet from 16m3/s to 5m3/s in the 1% event.Associated pipe upgrade would further mitigateflooding in Eve Street.

Nil

3.2 Mitchell Road Overland flows flood Mitchell Road and Coulson Street. All OSD, All RB

3.3 Sydney Park Channel overflows flood small portions of Sydney Park. All OSD, All RB

Table 2 Munni Flood Alleviation – WSUD Synergies

WSUD Synergies

# Name DescriptionPr

ecin

ct

OSD Redevelopment (On Site Detention)

OSD1 Everleigh Rail Workshops OSD as part of redevelopment.

OSD2 Australian TechnologyPark

OSD as part of redevelopment.

OSD3 Sydney Water SiteNewtown Street

OSD as part of redevelopment.

RB Retrofit (Public Space Retarding Basins)

RB1 Solander Park Retrofit RB to Solander Park.

RB2 MacDonald Street Design of RB to be included as part of WSUD project.

RB3 North – South Link Park(Ashmore Precinct)

RB to be accommodated within allocated POS within Ashmore redevelopment.

Loca

l

RR Road Renewals

RG Local raingardens Streetscape raingardens within source catchments can provide additional storage and flow attenuation (e.g. 50m3

per ha of treated catchment).

PR Private Retrofit

PR Private Rainwater Tanks Rainwater tanks with allocated air space storage (e.g. 1000L capacity per residential, 5000L capacity per non-residential).

Table 3 Rushcutters Bay Flooding Issues

# Flooding Location Flooding Issue SQQS Upgrade WSUD Synergies

Precinct

1 Roslyn Gardens Branch

1.1 Waratah Street Sag point, SQQS report suggests works havebeen carried out to alleviate this issue.

Nil

2 Craigend Street Branch

2.1 Craigend Street Ponding in sag to an approximate depth ofbetween 0.4 and 0.5m.

Nil

3 Boundary Street Branch

3.1 Oxford Street Sag in road with potential to flood shops,depth in street up to 0.45m.

Nil

3.2 Taylor Street Depths of 1.6m and 1.3m in sags resulting inproperty flooding.

New 1050mm diameter pipe from Taylor Street sagsbeneath Oxford Street to Boundary Street.

Nil

3.3 St Vincents Hospital Historical flooding reports. Nil

3.4 Boundary Street Hazardous flows in 5yr events and higheralong Boundary Street for several hundredmetres between Barcom Avenue andMaclachlan Avenue.

Currently receives overflows when capacity of culvertsbeneath Craigend Street is exceeded. An increase in inletcapacity in the MacLachlan Avenue / Boundary Streetvicinity would substantially reduce overland flows.

RB1

3.5 McLachlan Avenue Minor sag with regular flooding, includingflooding of private property.

Regrading of MacLachlan Avenue to Craigend Streetwould substantially reduce flooding in sag, but increaseflows to Craigend Street sag. Regrade footpath at cornerof Craigend Street and Neild Avenue to direct flows intochannel and redistribute flooding to adjacent oval.

RB1

Table 4 Rushcutters Bay Flood Alleviation – WSUD Synergies

WSUD Synergies


ecin

ct


Nil


RB1 Weigal Sports Ground

Loca

l

RR Road Renewals



PR Private Retrofit

PR Private Rainwater Tanks Rainwater tanks with allocated air space storage (e.g. 1000L capacity per residential, 5000L capacity per non-residential)

Table 5 Rosebery Flooding Issues


Precinct

1 Epsom Road Branch

1.1 Cressy Street Large pondage around the intersections ofBotany Road, Cressy Street and CollinsStreet. 29 houses and 4 shops inundated inprevious flood event.

Establish on-site detention targets for all redevelopment inGreen Square.

OSD1

1.2 Morley Avenue Pondage at the corner of Botany Road andMorley Avenue with depths up to 1m.

Requires acquisition of industrial complex to detain10,000m3. Provides complete protection from 50yr flowand good protection from 100yr.

RB1 & OSD1

2 Harcourt Parade Branch

2.1 Durdans Avenue Sag fed by overland flows from HarcourtParade. Sag outlet restricted by narrow

Mounding and excavation or underground tank inTurruwul Park plus acquisition of two old industrial sites to

RB2


Precinctopening between two old industrial buildingson Botany Road.

retain a total of a just over 10,000m3. *Small area of landacquisition to widen weir entering channel downstream ofBotany Road.

2.2 Ralph Street Overland flows from lack of channel capacitybeneath Ralph Street result in flooding onboth sides of the street. Occurs during stormevents of all duration.

RB2

3 Main Branch

3.1 Gardeners Road 5,110m3 of storage, overflows travel directlytoward Alexandra Channel.

Requires acquisition of industrial complex to detain4,000m3. Provides complete protection from events up toand including 100yr.

RB3

Table 6 Rosebery Flood Alleviation – WSUD Synergies

WSUD Synergies

# Name Description

Prec

inct


OSD1 Green Square Establish on-site detention targets for all redevelopment in Green Square.


RB1 Morley Avenue

RB2 Harcourt Parade

RB3 Gardeners Road

Loca

l

RR Road Renewals



PR Private Retrofit

PR Private Rainwater Tanks Rainwater tanks with allocated air space storage (e.g. 1000L capacity per residential, 5000L capacity per non-

WSUD Synergies

# Name Descriptionresidential)

Table 7 Blackwattle Bay Flooding Issues

# FloodingLocation


Precinct

1 Abercrombie Street Branch

1.1 PembrokeStreet

Overland flow path from LittleBuckingham Street through to ChalmersStreet.

Small catchment, limited potential to improve downstream,possible potential if coupled with pipe amplification to improvePembroke Street. Additional pipe upgrade would alleviate floodingin Chalmers Street.

RB1

1.2 Regent Street Unknown OSD1

2 Shepherd Street Branch

2.1 CodringtonStreet

Obstruction of overland flow path byUniversity assets.

Nil

2.2 Cleveland Street Sag in Cleveland Street discharges viaBeaumont St, park/mall onto BucklandStreet.

Amplification of drain from Cleveland Street to Macarthur Street,SGGS states: "the cost and inconvenience associated with suchan amplification would be prohibitive.” Associated upgrades toconduits beneath the Council Depot and Wentworth Park wouldalso be required to reduce downstream constrictions.

2.3 Broadway Major sag and overland flow pathsaffecting blocks south of Broadway Streetincluding Grafton Street. Overland flowout of sag along Mountain Street andBlackwattle Lane.

Upgrade to 2m by 4.2m conduit with inlet upgrades on Broadwayand along the entire length of Blackwattle Lane; some overflowwill persist. Associated upgrades to conduits beneath the CouncilDepot and Wentworth Park would also be required to reducedownstream constrictions.

All OSD, all RB

2.4 MacarthurStreet

Flooding of City of Sydney Depot andproperties on Macarthur Street,Blackwattle Lane and Kelly St.

Conduits beneath Depot to 2.1m by 8.7m, then dual 1.5m by 3.8mbeneath park. Associated upgrades to conduits beneathWentworth Park would also be required to reduce flooding.

All OSD, all RB

3 Mitchell Street Branch

3.1 Campbell Street Unknown

Table 8 Blackwattle Bay Flood Alleviation – WSUD Synergies

WSUD Synergies


ecin

ct


OSD1 Eveleigh Rail WorkshopsDevelopment

OSD2 Frasers


RB1 Prince Alfred Park

RB2 City of Sydney Depot

RB3 Wentworth Park

Loca

l

RR Road Renewals



PR Private Retrofit


Table 9 Centennial Park Flooding Issues

# FloodingLocation


Precinct

1 Moore Park Main Drain

1.1 StewartStreet

Sag point, SQQS report suggests works havebeen carried out to alleviate this issue.

1.2 LeinsterStreet

Significant sag with overland flows into therear of properties on Moore Park Road.

Upgrading inlet capacity will reduce flood levels Leinster Street,most significantly during storm events of 10yr ARI and more

# FloodingLocation


Precinctfrequent.

1.3 Moore ParkRoad

Overland flows along a few hundred metresof Moore Park Road, extending to slightlyabove gutter levels in a 100yr ARI event.

Modification to flow routing across Moore Park Road from theLeinster Street branch could reduce overland flows along MoorePark Road.

1.4 DriverAvenue

Large sag outside the SCG collects flowsfrom Moore Park Road, Kippax Lake andtrunk drainage overflow.

Increase mounding around existing lake by 900mm to increaseretarding capacity.

RB1

1.5 Lang Road Substantial flooding on Lang Road andFederation Way, but does not threatenproperty.

Increase mounding/retarding capacity of lake. Potential site forabove ground retarding basin constructed using embankments.The area is slightly removed from the main drain. Potential sitefor excavated retarding basin. The high water table and sandysoils would make construction of an excavated detention basindifficult.

All RB

Table 10 Centennial Park Flood Alleviation – WSUD Synergies

WSUD Synergies

# Name Description

Prec

inct


Nil


RB1 Kippax Lake

RB2 Bus Loop Field

RB3 Moore Park (Lot 1771)

Loca

l

RR Road Renewals



PR Private Retrofit

WSUD Synergies

# Name Description


Table 11 Johnstons Creek Flooding Issues

# FloodingLocation


Precinct

1 Orphan School Creek (incl. St Andrews College Sub-Branch, Hockey Field Sub-Branch & Physics School Relief)

1.1 Carillon Avenue Overland flow path between CampbellStreet and Carillon Avenue east ofNewtown North Primary School.

Upgrade 160m of 600mm pipe to 1050mm beneath St Andrewsoval and increase inlet sizes around Carillon Avenue.

1.2 University ofSydney

Oval number 1 acts as a de factoretarding basin with flooding of theadjacent Sports Centre.

Oval #1 already functions as a de facto retarding basin, there maybe an opportunity to extend storage to other open spaces in theUniversity including Oval #2, St Johns Oval, Hockey Square andSt Andrews Oval (underground car park may be an issue).Monitor developments within the University with the aim ofassessing the potential for integration of harvesting / stormwater /re-use schemes. Further upgrade of pipe beneath St Andrewsoval will also help alleviate flooding.

RB1 & OSD2

1.3 Larkin Street Overland flows and property floodingbetween Parramatta Road and PyrmontBridge Road on Larkin Street, SparkesStreet, Arundel Street, Sparkes Lane andJunction Street.

Substantial ponding will only be slightly mitigated by major pipeupgrades, SQQS recommends designating this area as a floodzone.

RB1 & OSD2

2 Federal Park

2.1 CarpetWarehouse

Given the localised nature of the flooding and proximity to trunkdrainage it seems possible that flooding at 2.1 could be alleviatedwith inlet and/or pipe amplification. Alternatively flooding at thislocation may be a result of proximity to mean sea level.

Table 12 Johnstons Creek Flood Alleviation – WSUD Synergies

WSUD Synergies


ecin

ct


OSD1 Harold Park

OSD2 University of Sydney


RB1 University of Sydney

Loca

l

RR Road Renewals



PR Private Retrofit


Table 13 Alexandra Canal Flooding Issues


Precinct

1 Moore Park Main Drain

1.1 Sydney Park Large open space with existing pondarrangement. Retrofit ponds or allocate furtheropen space to flood detention.

RB1

1.2 Burrows Road RB1

Table 14 Alexandra Canal Flood Alleviation – WSUD Synergies

WSUD Synergies


ecin

ct


OSD1 Nil


RB1 Sydney Park

Loca

l

RR Road Renewals



PR Private Retrofit


Table 15 Woolloomooloo Flooding Issues

# FloodingLocation


Precinct

1 Bourke Street

1.1 Yurong Street Major Sag also along Stream Street and waterponding on William Street near numbers 66-70. Potential for flooding up to 3m deep.

Extension of pipe from motorway to Stream Street via SirJohn Young Crescent and Riley Street. Nominal 1200mmdiameter required. This may worsen Bourke Street flooding.

1.2 Crown Street Number 24 flooded above floor level alsooverland flows along Palmer Street.

Riley Street pipe amplification as per 1.1 would also alleviateflooding along Crown Street.

1.3 Sydney EyeHospital

Flood level on driveway Large amounts of open space are available in the Domain,however there is little contributing catchment.

RB2

1.4 Bourke Street No 10 -12 reported road flooding. BourkeStreet, Wilson Street and Plunkett Street

Nil

# FloodingLocation


Precinctidentified as an overland flow paths.

2 Forbes Street

2.1 Dowling Street Major sag formed by railway line, potential forflooding up to 3m deep.

Open space on Forbes Street and Brougham Street branchesis available in the Sydney Place Park, Plunkett Street PublicSchool and Forbes Street Parks.

RB1

2.2 Cowper WharfRoadway

Acts as a barrier to overland flows that wouldotherwise flow into the harbour. Also affectsBrougham Street drain. No recorded floodingin this location, but large potential for floodingdue to large flat area upstream of road beinglower than the road.

Lowering a section of the road to 1.6m would allow trappedflows into the bay.

RB1

Table 16 Woolloomooloo Flood Alleviation – WSUD Synergies

WSUD Synergies

# Name Description

Prec

inct


OSD1 Nil


RB1 Sydney Place ParkPrecinct

RB2 The Domain

Loca

l

RR Road Renewals



PR Private Retrofit

PR Private Rainwater Tanks Rainwater tanks with allocated air space storage (e.g. 1000L capacity per residential, 5000L capacity per non-

WSUD Synergies

# Name Descriptionresidential)

Table 17 Sheas Creek Flooding Issues

# FloodingLocation


Precinct

1 Alexander Branch

1.1 Cope Street When Council's open channel downstream of Cope Streetreaches capacity flooding occurs along the road and intosome properties on Cope Street. Major flooding in 5yrand greater.

Detention in western half of Alexandria Park andCleveland High School. Pipe/channelamplification to link Cope St to Alexandria ParkRB.

RB4

2 Main Branch

2.1 Arthur Street Potential for minor flooding only.

2.2 Park Street 6,400m3 of storage.

2.3 Boronia Street 5,000m2 of flooding up to 0.5m deep. Recentimprovement to drainage made in this area.

2.4 Walker Street During high flows the intersection of Walker and PhillipStreets ponds and overtops south along Walker Street.The Walker Street trapped depression is the most severein the subcatchment, with a maximum depth of 1.9m anda maximum theoretical storage of 40,000m3. Significantproperty flooding.

Redistribution of public open space to formdetention in the block bounded by Young Street,Danks Street, McEvoy Street and Bourke Street.Pipe amplification to support the development ofthe Hunter Street detention and to allow theHunter Street RB to service the Walker Streetflooding area.

RB3

2.5 Danks Street 1,000m2 of flooding up to 0.45m deep. Floods evenduring relatively minor events.

RB3

2.6 Hunter Street Trapped depression inadequately drained due to lack ofinlet capacity or blocked pits. Total storage ofapproximately 8,100m3. Results in road and property

Pipe amplification to support the development ofthe Hunter Street detention.

RB3

# FloodingLocation


Precinctflooding.

2.7 Allen Street 2,700m2 of flooding up to 0.6m depth.

2.8 Bowden Street Significant area of flooding as a result of backwatereffects from local constrictions (such as road culverts)and flat grades.

Channel widening and incorporation of adjacentlandscaped areas to provide additional capacity.

3 Victoria Beach

3.1 Joynton Avenue 800m3 of ponding in the 5yr 5min storm as a result ofinsufficient downstream pipe capacity. Stormwaterstorage is provided along the road reserve, in propertyfrontages and within the car park and access areas ofRoyal South Sydney Hospital and the Mercedes-Benzdealer. Total storage is about 12,500m3.

Establish on-site detention targets for allredevelopment in Green Square. Up to threecommunity based detention locations in theblock bounded by Lachlan Street, Bourke Street,O'Dea Street and South Dowling Street.Detention adjacent to Joynton Avenue sag to beincluded in Green Square redevelopment.

RB1, RB2 &OSD1

3.2 Botany Road Sag where flooding is probably exacerbated by blockedpits. Severe flooding at this location would almostcertainly result in flows into Green Square undergroundrailway station.

3.3 O’RiordanStreet

Sag which floods roads and property frontages multipletimes per year, probably exacerbated by blocked pits.Potential volume of 4,300m3 over an area of 10,000m3

with a depth of up to 800mm.

4 Sheas Creek Branch

4.1 Huntly Street Significant area of flooding as a result of backwatereffects from local constrictions (such as road culverts)and flat grades.

As per 2.8, channel widening and incorporation ofadjacent landscaped areas to provide additionalcapacity for flooding.

Table 18 Sheas Creek Flood Alleviation – WSUD Synergies

WSUD Synergies


ecin

ct


OSD1 Green Square


RB1 Lachlan Street

RB2 Joynton Avenue

RB3 Hunter Street

RB4 Alexandria Park

Loca

l

RR Road Renewals



PR Private Retrofit


Garden Island

Oatley Reserve

Vice Chancellors

Oval

Pyrmont PointPark

Metcalfe Park

NewtownPublicSchool

Cook Community Garden

Cadi Park andElizabeth Plaza

The Maze

Moore Park Trust

Royal Botanic Gardens

Darling Harbour

Moore Park Trust

Harold Park

Victoria Park

The Domain

Hyde Park North

JubileePark

Hyde Park South

PrinceAlfred Park

Tumbalong Park

SCG

AlexandriaPark

Fox Studios

Wentworth Park

The DomainLawns

Reg Bartley Oval

Pirrama Park

FederalPark

Redfern Park

Waterloo Oval

Circular Quay

Observatory Hill Park

Aussie Stadium

ErskinevilleOval

Bicentennial Park

JubileeOval

Joynton Park

Belmore Park

First Fleet Park

Blackwattle Bay Park

EddieWardPark

HarryNoble

Reserve

FederalPark

Wynyard Park

Crown Park

GreenPark

Embarkation Park

Waterloo Park & Mount Carmel

Nuffield Park

Dawes Point Park

Pyrmont Bay Park

Glebe Foreshore Walk East

EdmundResch

Reserve

University of Sydney

Harmony Park

Glebe Foreshore Walk West

Dr H J Foley Rest Park

Mary AnnStreet Park

South SydneyRotary Park

Caldwell Park

Forbes StreetReserve

Cook + Phillip Park

Gibba Park

Glebe Foreshore Walk West

1.1

P1

OSD3

OSD4MacDonaldtown Erskineville Branch

Main Channel 74 Branch

Alexander Street Branch

331,000

331,000

332,000

332,000

333,000

333,000

334,000

334,000

335,000

335,000

336,000

336,000

6,247

,000

6,247

,000

6,248

,000

6,248

,000

6,249

,000

6,249

,000

6,250

,000

6,250

,000

6,251

,000

6,251

,000

6,252

,000

6,252

,000

6,253

,000

6,253

,000

N:\AU\Sydney\Projects\21\20242\GIS\Maps\MXD\Deliverables for Melbourne Report\31_27217_Z037_MB_Flood_Alliviation_Opportunities.mxd

0 240 480 720 960120

MetresMap Projection: Transverse Mercator

Horizontal Datum: GDA 1994Grid: GDA 1994 MGA Zone 56 o

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City of SydneyDecentralised Water Master Plan

Figure 1

Job NumberRevision A

31-27217

17 Nov 2011Date

Data source: Data Custodians City of Sydney, Sydney Water, 2011. Created by:AMDosani

Level 15, 133 Castlereagh Street Sydney NSW 2000 T 61 2 9239 7100 F 61 2 9239 7199 E [email protected] W www.ghd.com.au

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This map and/or data has been compiled from various sources andthe publisher and/or contributors accept no responsibility for anyinjury, loss or damage arising from the use, error or omissionstherein. While all care is taken to ensure a high degree of accuracy,users are invited to notify Council’s GIS Group of any mapdiscrepancies. No part of this map or data may be reproduced

Sydney Harbour

LegendCoS Drainage Catchments

FloodImpactProperty FloodingRoad FloodingPark Flooding

StormwaterClosed (Unknown)Closed (City of Sydney)Closed (Sydney Water)

Open (Unknown)Open (City of Sydney)Open (Sydney Water)Pipe Amplification

Cooks River

Sydney Harbour

Centennial Park

DRAFT

Flood Alleviation Opportunities

Oatley Reserve

Moore Park Trust

Moore Park Trust

SCG

Fox Studios

Aussie Stadium

Crown Park

EdmundResch

Reserve

335,000

335,000

336,000

336,000

337,000

337,000

6,247

,000

6,247

,000

6,248

,000

6,248

,000

6,249

,000

6,249

,000


0 90 180 270 36045





Figure 1


31-27217

17 Nov 2011Date



Paper Size A3


Centennial Park





Cooks River

Sydney Harbour

Centennial Park

DRAFT


Oatley Reserve

Vice Chancellors

Oval

NewtownPublicSchool

Cook Community Garden

The Maze

SydneyPark

Moore Park Trust

Moore Park Trust

Victoria Park

PrinceAlfred Park

SCG

AlexandriaPark

PerryPark

Redfern Park

Turruwul Park

Waterloo Oval

Aussie Stadium

ErskinevilleOval

Joynton Park

AllanDavidson

Oval

Belmore Park

EddieWardPark

HarryNoble

Reserve

Crown Park

Park

Waterloo Park & Mount Carmel

Southern Cross Dr Reserve

Nuffield Park

EdmundResch

Reserve

University of Sydney

Harmony Park

Kimberly Grove Reserve

Dr H J Foley Rest Park

Mary AnnStreet Park

South SydneyRotary Park

Caldwell Park

1.1

P1

OSD3

OSD4

Munni St - Erskineville Branch

MacDonaldtown Erskineville Branch

Main Channel 74 Branch

Alexander Street Branch

332,000

332,000

333,000

333,000

334,000

334,000

335,000

335,000

6,245

,000

6,245

,000

6,246

,000

6,246

,000

6,247

,000

6,247

,000

6,248

,000

6,248

,000

6,249

,000

6,249

,000


0 200 400 600 800100





Figure 1


31-27217

17 Nov 2011Date



Paper Size A3


Cooks River





Cooks River

Sydney Harbour

Centennial Park

DRAFT



GHD

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Document Status

Rev No.

Author Reviewer Approved for Issue

Name Signature Name Signature Date

Draft Dan O’Halloran

Ashley Roberts

Michael Healey

6.6.2012


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Documents

Appendix N - City of Sydney€¦ · Table 2 Munni Flood Alleviation – WSUD Synergies WSUD Synergies # Name Description Precinct OSD Redevelopment (On Site Detention) OSD1 Everleigh