SW8010323_COMPLIANCE_20030121

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT. NO.
SW v!(%�J�
DOC TYPE
El CURRENT PERMIT
❑ APPROVED PLANS
❑ HISTORICAL FILE
COMPLIANCE EVALUATION INSPECTION
DOC DATE
YYYYMMDD

DETENTION POND ANALYSIS FILENAME- G:IDATAIWPDATAIWQSIPOND1010323.WK1
PROJECT #: SW8 010323 REVIEWER: L. Lewis
PROJECT NAME: Trent River Oakey Grove Missionary Baptist Church
DATE:
21-Jan-03
Receiving Stream:
New River
Class:
SC HQW NSW
Drainage Basin:
White Oak
Index No.
WOK02 19-11
Site Area
5.75 acres
Drainage Area
':,.�30.244 . "
square feet
Area =
2.99 acres
IMPERVIOUS AREAS
Building
Parking
SW
Other
TOTAL
SURFACE AREA CALCULATION
% IMPERVIOUS 78.45%
Des. Depth 6
TSS: 90
Rational C
19969.00 square feet
78387.00 square feet
3633.00 square feet
192.00 square feet
square feet
square feet
#2181 ';00 square feet
Rational Cc= 0.04
SAIDA Ratio 4.49%
Req. SA 5850 sf
Prov. SA `..:.,..:.;59 sf
VOLUME CALCULATION * place a 1" in the box if Rational is used
Rational ?*
Des. Storm
......., . 1 00::
inches
Rv=
0.76
Bottom
3 msl
Perm. Pool
9 00
msl
Design Pool
10.27 msl
Design SA
7129 sf
Req. Volume
::.::;::,:;820
cf
Prov. Volume
<:8247
cf
ORIFICE CALCULATION
Avg. Head =
Flow Q2, cfs
Flow Q5, cfs
No. of Orifices
Diameter, inches
Drawdown =
FOREBAY
Perm. Pool Volume= 15491
Req. Forebay Volume= 3098.2
Provided Volume= 2841.00
Percent= 183°fo
SA @ _
Elevation=
COMMENTS
Surface Area , Volume and Orifice are within Design Guideline:
1.81
sq. in.
0.72
sq. in.
0.79
sq. in.
0.021
cfs
in x
in