HomeMy WebLinkAboutSW8020906_COMPLIANCE_20021125STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO. SW. 0,
DOC TYPE ❑ CURRENT PERMIT
❑ APPROVED PLANS
❑ HISTORICAL FILE
COMPLIANCE EVALUATION INSPECTION
DOC DATE- l
YYYYM M D D
DETENTION POND ANALYSIS FILE NAME: G:IDATAIWPDATAIWQSIPOND1020906.WK1
PROJECT #: SW8 020906 REVIEWER: L. Lewis
PROJECT NAME: First Baptist Church of Shallotte
DATE: 25-Nov-02
Receiving Stream: UT Sharon Creek Class: SC HQW
Drainage Basin: Index No. 15-25-2-9-(2)
Site Area 10.25 acres
Drainage Area9fl.a0., square feet Area = 10.25 acres
IMPERVIOUS AREAS
Building
Parking
SW
TOTAL
SURFACE AREA CALCULATION
32600.00 square feet
124359.00 square feet
1080.00 square feet
square feet
square feet
square feet
158039 00 square feet
Rational C
Rational Cc= 0.13
IMPERVIOUS
35.40%
SA/DA Ratio
2.22%
Des. Depth
5.5
Req. SA
9929 sf
TSS:
90
Prov. SA
2.1..44.4: sf
VOLUME CALCULATION * place a "1" in the box if Rational is used
Rational ?"
Des. Storm
;, ., ......',0:
inches
Rv=
0.37
Bottom
22 msl
Perm. Pool
27 50. msl
Design Pool
29 msl
Design SA
26053 sf
Req. Volume
1371''>
cf
Prov. Volume
:<::.>:35623'
cf
ORIFICE CALCULATION
FOREBAY
Perm. Pool Volume= 69520
Req. Forebay Volume= 13904
Provided Volume= 13848.00
Percent= ..199°l
SA @ _
Elevation=
Avg. Head =
0.71
ft
Q2 Area =
2.81
sq. in.
Flow Q2, cfs
0.079
cfs
Q5 Area =
1.12
sq. in.
Flow Q5, cfs
0.032
cfs
Orifice Area
2.41
sq. in.
No. of Orifices
..........:.:................::
Q=
0.068
cfs
Diameter, inches
��... 1 .7.5'.!
weir H x W
......: i
:, i n
x
:.:.::
m
Drawdown =
2 3,;I
days
COMMENTS
Surface Area , Volume and Orifice are within Design Guidelines