Works Approval Report.pdf - the National Capital Authority
Works Approval Report.pdf - the National Capital Authority
Works Approval Report.pdf - the National Capital Authority
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Campbell Section 5 - <strong>Works</strong> <strong>Approval</strong> Project Ref: 110029Prepared for <strong>the</strong> Land Development AgencyPipelineOverland Flow PathNB <strong>the</strong> exact alignment of <strong>the</strong> existing stormwater pipe at Page Street/Chowne Street is unverifiedFigure 8.2: Existing Stormwater Network8.2.3 Proposed Development ConditionsExisting Pipe Network UpgradeIt is proposed to increase <strong>the</strong> size of <strong>the</strong> existing pipeline through <strong>the</strong> site to eliminate <strong>the</strong> existingsurcharge at <strong>the</strong> manhole at <strong>the</strong> corner of Anzac Park East and Page Street. The pipe will beincreased from 1050mm diameter to 1350mm diameter from this manhole to <strong>the</strong> road low point inChowne Street. The pipeline will be increased from 1050mm and 1200mm diameter to 1500mmdiameter from this point downstream to <strong>the</strong> surcharge/outlet structure of <strong>the</strong> proposed retardingbasin upstream of Road 2-(B) and Road 2-(C). The outlet pipe from <strong>the</strong> basin will be 1350mmdiameter to a surcharge structure at <strong>the</strong> end of <strong>the</strong> proposed median in Road 3. The pipe from <strong>the</strong>surcharge structure will be 1200mm diameter for a short length to join onto and align with <strong>the</strong>existing 1200mm diameter pipe in Wendouree Drive, across and downstream of ConstitutionAvenue.A new 225mm diameter pipe is proposed to be constructed from <strong>the</strong> upgraded 1350mm diameterpipe on Chowne Street to redirect dry wea<strong>the</strong>r base flows and minor storm flows to a proposed CDSNovember 2012 Cardno 48