Town Center Subbasin Study Report - Bellingham Massachusetts

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