Town Center Subbasin Study Report - Bellingham Massachusetts

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Proposed Designs for Drainage Area O6: Toni and Jamie Drive Cul-de-SacO6 Toni and Jamie Drive: Detention PondRetrofit to Infiltration Basin Stormwater ControlDescription:The existing detention pond located in this drainagearea is currently overgrown with invasive species andit is unclear if the basin is functioning as designed.To provide additional water quality treatment andinfiltration, the pond will be converted into aninfiltration basin with a sediment forebay. The existingoutlet structure will be used to discharge overflowfrom the infiltration basin. The infiltration basinhas been designed to comply with the Mass DEPStormwater Management Standards because it maybe located within the buffer zone to adjacent wetlandresources.O6 Toni and Jamie Drive: Basin RetrofitDrainage Area (acres) 4.92Impervious Area (acres) 1.15Estimated Infiltration Rate (in./hr) 0.61Target Phosphorus Removal 85.1%Water Quality Depth (in.) 0.61Water Quality Volume (ft3) 2,670±Stormwater Control Surface Area (ft2) 7,170±Estimated Construction Cost $14,870Plan and section details can be found in Appendix C.26
Proposed Designs for Drainage Area O6: Toni and Jamie Drive Cul-de-SacBEFORE: Photo of existing detention basinAFTER: Visualization of proposed infiltration basin retrofit“The existing detention pond located in this drainage area is currently overgrown with invasive species and it is unclear if the basin is functioning as designed . To provideadditional water quality treatment and infiltration, the pond will be converted into an infiltration basin with a sediment forebay”27
Page 5: STUDY AREA SELECTIONRHODE ISLANDFig
Page 9 and 10: TMDL Land UseCategoryArea in studya
Page 11: Existing Conditions for Drainage Ar
Page 14 and 15: Existing Conditions for Drainage Ar
Page 16 and 17: Proposed Stormwater Management Desi
Page 18 and 19: Proposed Designs for Drainage Area
Page 32 and 33: Modeling AnalysisCRWA developed thr
Page 34 and 35: ConclusionsCONCLUSIONNEXT STEPSLESS

Town Center Subbasin Study Report - Bellingham Massachusetts

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