SW6201201_1641 Volumes Required_20201210

Static Line Brewery Required Storm Volume
Pond #1
Drainage Area:
10.61 acres 462,389 sf
Impervious Area: 351,118 sf (8.06 ac)
Impervious: 75.9%
1 inch Storm Event:
Rv = 0.05+0.009 1
Rv = runoff coefficient
1= percent impervious
Rv=0.05+0.009*75.9%
= 0.7331
For volume that must be controlled:
Volume=3,630*Rd*Rv*A
Volume required = 3,630*(1 inch)*(0.7331)*10.61acres = 28,235 cf
Volume provided = 71,700 cf
Forebay vol = 12,441 cf (18.3%)
SA/DA ratio is 1.28 for a depth of 3 feet
Required surface area = 10.61ac * (.0128) = 0.1358ac or 5,916 sf
Surface area provided = 16,020 sf
409 Chicago Drive, Suite 112, FayetteviIle. NC 28306
office 1 910-426-6777 fax [phone]
On time, every time. I www.4Dsitesolut!ons.com