SW8050303_COMPLIANCE_20050305

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW �2
DOC TYPE
❑ CURRENT PERMIT
❑ APPROVED PLANS
❑ HISTORICAL FILE
P,�COMPLIANCE EVALUATION INSPECTION
DOC DATE
YYYYMMDD

WET DETENTION POND ANALYSIS
FILE NAME: S:IWQSIPOND1050303.mar05.WK1
PROJECT #: SW8 050303.mar05 REVIEWER:
PROJECT NAME: Zaxby's Restaurant Gordon Road DATE: 02-Mar-05
Receiving Stream: U1 Smith Creek. Class: C Sw
Drainage Basin: Cape ;~ear Index No.
Site Area 1.32 acres
Drainage Area 576Fi00 square feet Area in Acres 1.32
IMPERVIOUS AREAS
Buildings
Parking
SW
Future
TOTAL
SURFACE AREA CALCULATION
IMPERVIOUS 60.00%
Des. Depth 3.5
TSS: 90
Rational C
3150.00 square feet
27600.00 square feet
2650.00 square feet
1212.00 square feet
square feet
square feet
square feet
;A812.`00ill square feet
Rational Cc= 0.08
SAIDA Ratio 6.00%
Req. SA 3461 sf
Prov. SA 28 sf
VOLUME CALCULATION * place a "1" in the box if Rational is used
Rational ?*
Des. Storm
1'J0'
inches
Rv=
0.590
Bottom
40.25 msl
Perm. Pool
f 43 5.; msl
Design Pool
44.25 msl
Storage met @elev 44.16 msl
Req. Volume r36', cf
Vol. Prov. at DP ` !345.a.�` cf
ORIFICE CALCULATION
Avg. Head =
Flow Q2, cfs
Flow Q5, cfs
No. of Orifices
Diameter, inches
Drawdown =
C: 3.296190476 L=
FOREBAY
Perm. Pool Volume=
Req. Forebay Volume=
0
Provided Volume=
Percent=IaIV.Ol
'
Elevation Area
Inc. Vol. Acc. Vol.
43.75 6258.00
0.00
44.25 7555.00
3453.25 3453.25
Q2 Area =
1.03
sq.
Q5 Area =
0.41
sq.
Orifice Area
0.79
sq.
Q=
0.013
cfs
in
x
C
Surface Area @DP =
Falling Head Drawdown =
-0.046
COMMENTS
Surface Area , Volume and Orifice are within Design Guidelines
inches
inches
inches
LLLE in
7555 sq. ft.
4.3 days

Zcxa.S
Date Design Sheet
NORRIS, KUSKE &TUNSTALL 902 Market St.
O } 5CONSULTING ENGINEERS, INC. Wilmington, N.C.28401-4733 Of l
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RECEIVED
MAR 0 3 2005
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' Date Design �, NORRIS, KUSKE &TUNSTALL
CONSULTING ENGINEERS. INC.
Check Job For
902 Market St. Sheet
Wilmington, N.C.28401-4733 Of
Job No.
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NUT 4 ((SUS
State Stormwater Management Systems
Permit No. SW8 050303
Zaxby's Restaurant @Gordon Road
Stormwater Permit No. SW 8 050303
New Hanover County
Designer's Certification
IJA4 Qi-P NHS , as a duly registered n t.- I in the
State of North taeolina, having been authorized to observe (periodically
.S=e} the construction of the project,
(Project)
for 11rGrI I" Qw&L-,omJ (Project Owner) hereby state that, to the
best of my abilities, due care and diligence was used in the observation of the project
construction such that the construction was observed to be built within substantial
compliance and intent of the approved plans and specifications.
The checklist of items on page 2 of this form is included in the Certification.
Noted deviations from approved plans and specification:
Signature
Reg
Date
SEAT_
cc: Scott Lindstrom / Iron -Horse Development
Page 6 of 7

r-
State Stormwater Management Systems
Permit No. SW8 050303
Certification Requirements:
The drainage area to the system contains approximately the permitted
acreage.
The drainage area to the system contains no more than the permitted
amount of built -upon area.
All the built -upon area associated with the project is graded such that the
runoff drains to the system.
L5.4. All roof drains are located such that the runoff is directed into the system.
e outlet/bypass structure elevations are per the approved plan.
The outlet structure is located per the approved plans.
7. Trash rack is provided on the outlet/bypass structure.
All slopes are grassed with permanent vegetation.
9. Vegetated slopes are no steeper than 3:1.
lets are located per the approved plans and do not cause short-
circuiting of the system.
_�>�permitted amounts of surface area and/or volume have been
_provided.
2. equired drawdown devices are correctly sized per the approved plans.
3. required design depths are provided.
4. All required parts of the system are provided, such as a vegetated shelf,
and a forebay.
5. The required system dimensions are provided per the approved plans.
cc: NCDENR-DWQ Regional Office
Tony Roberts, New Hanover County Building Inspections
Page 7 of 7