Macarthur 2 Commuter Car Park - Transport for NSW - NSW ...

Determination ReportMACARTHUR 2 COMMUTER CAR PARKSubmission Number Issues raised TIDC response(aa) Salinity potential should also look at downstreamimpacts(bb) A ‘Water Cycle Management Plan’ should beprepared for Council comment in line with WaterSensitive Urban Design Principles(cc) The On Site Detention (OSD) is not required to caterfor 1 in 100 year storm events – the device shouldbe designed for a sub 5 year storm event(dd) Any direct connection of devices into the adjacentcreek area should be designed to reduce scourpotential in accordance with the Campbelltown DCP2009 Vol2(ee) All battered areas to be fully landscaped to reducethe need for ongoing maintenance(ff) No mulch/wood chip to be placed within the 100year flood zone(gg) Suitable planting to be located along the interface ofthe carpark and the creek with no trees in the 100year flood zone or creek embankment. All speciesand locations to be natives and approved by Council(aa) Salinity will be managed by a Sediment Control Planthat will form part of the Construction EnvironmentalManagement Plan.(bb) The management of water from the site is consistentwith the principles of Water Sensitive Urban Design.These measures are currently under review by RailCorpand TIDC for all commuter car parks in the CCPP.(cc) PB has advised TIDC that OSD is not required as part ofthis proposal, provided the capacity of the downstream culverts of Menangle Rd and the railway are notbreached. The car park can discharge directly into thecreek. It should be noted that water quality treatmentwould still be required prior to discharge and thedischarge point would need to be designed to includescour and erosion protection measure.(dd) The detention basin has a concrete weir structure tolimit outflow with a rock gabion mattress and grasslinetailout at the single discharge for stormwater on site tocater for both the western and eastern car parks andminimise scour potential.(ee) Hydro mulching will be sprayed on adjoining propertybatters to promote quick growth for stabilisation. Referto Condition No. 26.(ff) Agreed. Refer to Condition of Approval No. 26 inAppendix No.3.(gg) Campbelltown City Council previously granteddevelopment consent for the site which required sitelandscaping. Condition of Approval No.26 alsorecommends further landscape treatment of the site.1055342_2.DOC 25