SW8011123_COMPLIANCE_20020204

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW �Ivll Iai 3
DOC TYPE
❑ CURRENT PERMIT
❑ APPROVED PLANS
❑ HISTORICAL FILE
COMPLIANCE EVALUATION INSPECTION
DOC DATE
YYYYMMDD

DETENTION POND ANALYSIS
FILE NAME: S:1WQSIPOND1011123.WK1
PROJECT #: SW8 011123
REVIEWER: L. Lewis
PROJECT NAME: Windemere Presbyterian Church DATE: 04-Feb-2002
Receiving Stream: UT Bradley Creek Class: SC HQW # Chlorides: n/a
Drainage Basin: Cape Fear Index No. 18-87-24-4-(1)
Site Area 4.10 acres
Drainage Area :;.,;160349 00' square feet Area in Acre 3.68
IMPERVIOUS AREAS
Rational C
Existing BUA 38407.00 square feet 1.00
New Building 10228.00 square feet 1.00
New Parking 10763.00 square feet 1.00
New SW 5540.00 square feet 1.00
square feet
square feet
TOTAL 64938!QO square feet Rational Cc= 0.52
SURFACE AREA CALCULATION
% IMPERVIOUS 40.50%
Des. Depth 4
TSS: 90
SA/DA Ratio 3.54%
Req. SA 5676 sf
Prov. SA sf
VOLUME CALCULATION * place a 1" in the box if Rational is used
Rational ?*
1
Des. Storm
............1
_....
inches
Rv=
0.41
Bottom
26 msi
Perm. Pool
:. 3000' msl
Design Pool
31.1 msl
Design SA
7161 sf
Req. Volume
-�l
cf
Prov. Volume
:'.............;:1..71PT
cf
ORIFICE CALCULATION
FQREBAY
Perm. Pool Volume=
Req. Forebay Volume=
Provided Volume=
Percent=
SA @ _
Elevation=
#1 #2
12983
12983
1454.096
1142.5
1396.00
1,289
Avg. Head =
0.53 ft Q2 Area =
1.67 in'
Flow Q2, cfs
0.041
cfs Q5 Area =
0.67 in
Flow Q5, cfs
0.016
cfs Orifice Area
0.79 in'
No. of Orifices
......:.::..........`...1'<
Q=
0.019 cfs
Diameter, inches
1 OOY
or weir H x W in
x ::� in
Drawdown =
42
_
days
COMMENTS
Surface Area , Volume and Orifice are within Design Guidelines

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STORMWATER SYSTEM NARRATIVE
WINDERMERE PRESBYTERIAN CHURCH
RECEIVED
NOV 2 6 2001
DMQ 2
PRO3 # W �� 12 J
WILMINGTON, NORTH CAROLINA
For
Windermere Presbyterian Church
104 Windemere Road
Wilmington, NC 28405
October, 2001
Prepared by,
ANDREW & KUSKE CONSULTING ENGINEERS, INC.
902 Market Street
Wilmington, North Carolina 28401
[phone]
[phone] — Fax
www.andrewandkuske.com
A & K 900311

NARRATIVE
STORMWATER MANAGEMENT MEASURES:
The project site is located in New Hanover County. Land disturbing on the site will
exceed one acre which requires the site to comply with the City and State Regulations. The
stormwater runoff from the development will be directed to the proposed stormwater detention
pond. The stormwater detention pond was designed to accommodate this site at 40.5%
impervious area lot coverage.
CONSTRUCTION SEQUENCE
The Contractor will install the gravel construction entrance and silt fence prior to
beginning any clearing and grading operations. Additional silt fence will be installed when and if
conditions warrant during construction. The detention pond/silt basin will be constructed
immediately after that portion of the site is cleared, and outlet structure with protection will be
installed. Disturbed areas will be landscaped or seeded upon completion.
2