SW8010424_COMPLIANCE_20010625

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
DOC TYPE ❑ CURRENT PERMIT
❑ APPROVED PLANS
❑ HISTORICAL FILE
COMPLIANCE EVALUATION INSPECTION
DOC DATE- 2(7/il/��J
YYYYMMDD

DETENTION POND ANALYSIS
FILE NAME: S:IWQSIPOND1010424.WK1
PROJECT #: SW8 010424
REVIEWER: Lewis
PROJECT NAME: Southeast Burgaw Properties, LLC DATE: 25-Jun-2001
Receiving Stream: UT Turkey Creek Class: C SW Chlorides: n/a
Drainage Basin: Cape Fear Index No. 18-74-54
Site Area 5.00 acres
Drainage Area �,217800 00`lsquare feet Area in Acre 5.00
IMPERVIOUS AREAS
Rational C
Building 3600.00 square feet 1.00
Storage Yard 102663.00 square feet 1.00
square feet
square feet
square feet
square feet
TOTAL 17, 106263 001square feet Rational Cc= 0.59
SURFACE AREA CALCULATION
% IMPERVIOUS 48.79%
Des. Depth 5.5
TSS: 90
SA/DA Ratio 3.03%
Req. SA _6594 sf
Prov. SA _1227611sf
VOLUME CALCULATION * place a "1" in the box if Rational is used
Rational ?*
1
Des. Storm
1 QO'
inches
Rv=
0.49
Bottom
14.5 msl
Perm. Pool
12MEAMMS1
Design Pool
21 msl
Design SA
10800 sf
Req. Volume
10714`
cf
Prov. Volume
11538dcf
ORIFICE CALCULATION
Avg. Head =
Flow Q2, cfs
Flow Q5, cfs
No. of Orifices
Diameter or
Weir Dimensions
FO.REBAY
Perm. Pool Volume=
Req. Forebay Volume=
Provided Volume=
Percent=
SA @ -
Elevation=
Q2 Area = 2.68 in'
Q5 Area = 1.07 in
Orifice Area 1.23 in
Q= 0.028 cfs
Drawdown T 4 4ldays
COMMENTS
Surface Area , Volume and Orifice are within Design Guidelines
44813
8962.6
9288.00
20 7%:

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