Lower Byersville Creek Flood-Risk Mapping Update - City of ...

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R AVERSKINE AV!(!(!(!(!(LANSDOWNE!(!(!(!(!(!(!(!(!(!(!(!(!(Figure 1.2Location of Examiner Ditch!(Low Point on RoadwayApprox. 194.6m!(!(Byersville CreekThe Parkway!(!(Pond#CPR Rail Line"Spill" Arrows Indicated on1991 Flood Risk MappingTwin 2.0mCSP culverts"Spill" Arrows Indicated on1991 Flood Risk MappingTHE KINGSWAYExaminer DitchTwin 1.2m culverts#THE QUEENSWAY!(!(!(!(!(!(!(!(!(!(!(!(!( !(BORDEN AVPipe Stub Inlet to Erskine AvenueStorm Sewer (see photo in Appendix C)!(!(!(!(!(CROWN DRKINGSWAY CT!(!(!(!(!(Twin 1.5m culverts!(!(Examiner Ditch!(!(!(!(!(!(!(!(!(CAMERON PLQUEENSWAY CTFORMER CNR LINE (now a paved pathway)!(!(ORPINGTON RDCAMERON ST!(!(!(!(!(!(!(!(!(!(!(
City of PeterboroughLower Byersville Creek Flood-Risk Mapping UpdateINTRODUCTIONA remaining concern is that the mapping presented in the 2009 Flood ReductionStudy may not fully represent the flood-risk potential south of the recreationalpathway, in the area of Mountain Ash Road, Orpington Road, Cameron Street,Erskine Avenue, and vicinity. This area did experience significant surface floodingduring the 2004 event. One concern was that this surface flooding may not havebeen due only to local drainage systems becoming overwhelmed during the 2004event, but that the extent of flooding may have in part been due to surface flowovertop the recreational pathway (former CNR line).1.2 Scope of This ReportAt the City’s request, XCG has undertaken an update to the Regulatory flood-riskmapping for the portion of Byersville Creek that lies south of Lansdowne StreetWest.As described in this report, this update has been based on using availableinformation complemented by some limited additional investigations. The HEC-RAS hydraulic models previously developed for the main stem of Byersville Creekand for the Examiner Ditch have been employed. Additional HEC-RAS modellinghas been carried out to allow for flood-risk mapping south of the recreationalpathway.3-2087-09-01/R_3-04108226_Byersville Creek Mapping Update 1-408/11/10
Page 1 and 2: EXCELLENCE INENVIRONMENTALCONSULTIN
Page 3 and 4: City of PeterboroughLower Byersvill
Page 5: City of PeterboroughLower Byersvill
Page 25 and 26: WEBBER AVRALPHSON CRWENTWORTH ST1+0
Page 33 and 34: APPENDIX A: PHOTOS PROVIDED TO XCG
Page 43 and 44: February 9, 2010Dear Resident,XCG C
Page 45 and 46: MOUNTAIN ASH RDBARNES CRROBERT RDER
Page 47 and 48: ResponseNo.XCG file 3‐2087‐09
Page 49 and 50: XCG file 3-2087-09-01 APPENDIX B Pa
Page 53 and 54: C.2.1 Subcatchment Refinements:Refi
Page 55 and 56: FIGURE C-2: SCHEMATIC OF MODIFIED P
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For the Regional Storm, the event r
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Photo date May 28, 2007Photo date M
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WEBBER AVRYE STMOUNTAIN ASH RDROBER
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City of PeterboroughLower Byersvill
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FIGURE D-3 Examiner Ditch West Spil
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TABLE D-3HEC-RAS RESULTS for EVENT
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TABLE D-5HEC-RAS RESULTS for EVENT
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TABLE D-7HEC-RAS RESULTS for REGION
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TABLE D-9HEC-RAS RESULTS for REGION
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TABLE D-11HEC-RAS RESULTS for REGIO
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TABLE D-13HEC-RAS RESULTS for REGIO
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Lower Byersville Creek Flood-Risk Mapping Update - City of ...

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