Text · page 819 of 1174
Read the whole document on one page (all 1174 pages, each with its own heading)
Stormwater Ponds Design Point: 1 Enter Site Data For Drainage Area to be Treated by Practice Contributing Impervious Percent Drainage Area WQv Precipitation Area Area Impervious Rv Description Number (cf) (in) (Acres) (Acres) % 1 53.00 11.20 21 0.24 46,210 1.00 0 Select pond type Wet Pond Design Criteria Is the pond located within jurisdictional waters? No Enter the natural slope of the pond area (%) 2 Enter underlying soil infiltration rate (based on 0 geotechnical testing, refer to Appendix D). Has an impermeable liner been provided? No Is the pond located within a sole source aquifer? No Is the pond located within a designated hotspot? No Enter depth to seasonal high water table (ft) 5 Enter depth to sound bedrock (ft) 5 List any drainage areas treated by other practices Additional 0 that will be directed to this practice. Areas Is the contributing area less than the minimum No contributing area? Will the pond discharge to trout waters? No Has a controlled outlet been provided? Yes Has an emergency spillway been provided? Yes Has pretreatment been provided per Section Yes 6.1.3? Enter freeboard depth (ft) 1 Enter side slopes above permanent pool (X:1) 4 Enter aquatic bench slope (%) 15 Enter aquatic bench slope to pond floor (X:1) 6.66 Enter min. aquatic bench width provided (ft) 10 Enter aquatic bench average width provided (ft) 15 Enter aquatic bench depth (inches) 1.5 Enter maintenance access slope (%) 5 Enter maintenance access width (ft) 20 Enter permanent pool depth (ft) 4 Minimum permanent pool depth per Water 4.00 Balance Calculation (ft) Sizing Criteria Value Units Notes Required Water Quality Volume 46210 cf Pretreatment WQv Provided 5000 cf Permanent Pool WQv Provided 50000 cf Extended Detention WQv Provided 0 cf Determine the Water Quality Volume Treated Water Quality Volume Treated 46,210 cf Page 819 of 1174