Stormwater Management Report South Hope Chapel Rd. Subdivision Project #23184
EXISTING POINTS OF ANALYSIS (POA)
POADescription
POA 1South Hope Chapel Road
POA 2Lot 11
POA 3Wetlands
POA 4Lot 15
EXISTING DRAINAGE AREAS
Drainage AreaPoint of AnalysisDescription
DA – E1POA 1The area contains single family houses with driveways and associated accessory structures. The remainder of the area contains dirt and grass areas. The runoff from the area is untreated and drains towards POA 1.
DA – E2POA 2The area contains single family houses with driveways and associated accessory structures. A small portion of the area contains dirt and grass areas. The remainder of the area is wooded. The runoff from the area is untreated and drains towards POA 2.
DA - E3POA 3The entire area is wooded. The runoff from the area is untreated and drains towards POA 3.
DA – E4POA 4The area contains single family houses with driveways and associated accessory structures. A small portion of the area contains dirt and grass areas. The remainder of the area is wooded. The runoff from the area is untreated and drains towards POA 4.
The results of the existing conditions analysis are contained in the Appendix and summarized below: POA-1
Storm Event (year)Existing Onsite Peak Runoff (CFS)Required Reduction (%)Allowable Peak Runoff (cfs)
2 (current)0.77500.39
2 (future)1.01500.51
10 (current)1.56251.17
10 (future)1.98251.49
100 (current)3.44202.75
100 (future)4.36203.49
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