1980 MIPAULA COURT_ RESA22-0026 CALCS- REVISION 12-19-22Comp. By:
Date:
Public Works Department
City of Atlantic Beach
Permit No:
Address:1980 MIPAULA COURT
Required Storage Volume
Criteria:
Section 24-66 of the City of Atlantic Beach's Zoning, Subdivsion, and Land Development Regulations requires
that stormwater runoff from impervious areas be stored onsite. Volume to be retained is as follows:
V = CAR/12 which is the Modified Rational Method for estimating stormwater runoff
Where: V = Volume of Runoff to be stored (cubic feet)
C = Runoff Coefficient, 0.92, the difference between impervious area (C=1.0)
and undeveloped conditions (C=0.08).
A = Impervious Area (square feet)
R= 25-yr / 24-hr rainfall depth (9.3 inches for Atlantic Beach)
Onsite Storage Volume Required for Impervious Area:
Lot Area = 10,812 ft2
Impervious Area (A) = 5,120 ft2 =47.4%
V = 0.92 x 5,120.0 x9.3/ 12
V = 3,651 ft3
Provided Storage:
Area 1 - FRONT Area Storage Sideslope:4 :1
(ft)(ft2) (ft
3)
11.3 799 BOTTOM
12.0 1,465 TOB
Area 2 - Area Storage
(ft) (ft
2) (ft
3)
BOTTOM
TOB
Area 3 - Area Storage
(ft) (ft
2) (ft
3)
0 BOTTOM
0 TOB
Inground Storage: = A*d/pf
Total Storage Area at TOB (A) =1465.0 ft2
Depth to ESHWT from BOTTOM (d) =5.0 ft, default is 2.0 ft, verify onsite ESHWT
Pore Factor (pf) = 0.4 default is 0.4
Inground Storage Provided =2930.0 ft3
Required Treatment Volume =3,651 ft3
Supplied Treatment Volume =3,722 ft3
Reynold Peterson, P.E.
792
0
0
12/16/2022
Retention atlantic beach _Calcs template 12/16/2022
Reynold D.
Peterson
Digitally signed by Reynold
D. Peterson
Date: 2022.12.16 07:11:50
-05'00'
By Toni Gindlesperger at 3:41 pm, Dec 19, 2022