SW1200501_Calcs (Stage-storage) (1)_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 #1
Contour ElevationContour Area (sf)Depth (ft)Incremental Volume (cf)Cumulative Volume (cf)
23061463.65N/AN/AN/A
23072021.5411742.601742.60
23082635.9712328.764071.35
Minimum Volume Required for Design Storm of 1" = 572 cu.ft. or 33% of the actual volume at 12" of ponding.
12" x 33% = 3.96" or .33'
Elevation of the 1" design storm = 2306.33
Buncombe Co. Pre vs Post 1 yr, 24 hour event, Volume to be treated = 1099 cu.ft. or 63% of the actual volume at 12" of ponding.
12" x 63% = 7.56" or .63'
Elevation of the treated volume = 2306.63