SW1200501_Calcs (Stage-storage) (2)_20201109

Stage Storage Calculations
Project #:19.00154
Project Name:Fairview Elementary Car Rider Road
Date:8/6/2020
By:N Sawyer
Basin Name:Bio Retention Cell #2
Contour ElevationContour Area (sf)Depth (ft)Incremental Volume (cf)Cumulative Volume (cf)
22702793.6N/AN/AN/A
22713471.5613132.583132.58
22724206.0713838.826971.40
Minimum Volume Required for Design Storm of 1" = 1847 cu.ft. or 58% of the actual volume at 12" of ponding.
12" x .58% = 6.96" or .58'
Elevation of the 1" design storm = 2270.58
Buncombe Co. Pre vs Post 1 yr, 24 hour event, Volume to be treated = 3048 cu.ft. or 97% of the actual volume at 12" of ponding.
12" x 97% = 11.64" or .97'
Elevation of the treated volume = 2270.97