SW8050704_COMPLIANCE_20050711

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

DETENTION POND ANALYSIS FILE NAME: G:\DATA\WPDATA\WQS\POND1050704.WK1
PROJECT #- SW8 050704 REVIEWER: R. Gordon
PROJECT NAME:
Lot #1 Oak Island Business Park
DATE:
11-Jul-05
Receiving Stream:
Beaverdarn Creek
Class:
SC-,Sw;HQW
Drainage Basin:
Cape Fear
Index No.
18-88-9-1-(0.5)
Site Area
1.96 acres
Drainage Area
so
square feet
Area
1.20 acres
IMPERVIOUS AREAS
Buildings
Parking/Asphalt
Sidewalks
TOTAL
SURFACE AREA CALCULATION
Rational C
10400.00 square feet 0.95
18100.00 square feet 0.95
1116.00 square feet 0.95
square feet
square feet
square feet
square feet
Rational Cc= 0.62.
% IMPERVIOUS
56,51%
SA/DA Ratio
3.62%
Des. Depth
5.5
Req. SA'
1898 sf
TSS:
90
Prov. SA
2017 sf
VOLUME CALCULATION
Rational ?*
Des. Storm
O.O::�
inches
Rv=
0.56
Bottom
37 msl
Perm, Pool
Q.:� msl
Design Pool
44.25 msl
Design SA
3708 sf
Req. Volume
-.2 '440':
cf
Prov. Volume
.. .. .. .. .. .. .. 005'
cf
ORIFICE CALCULATION
Avg. Head =
Flow Q2, cfs
Flow Q5, cfs
No. of Orifices
Diameter, inches
Drawdown =
* place a "I" in the box if Rational is used
FOREBAY
Perm. Pool Volume=
Req. Forebay Volume=
Provided Volume=
Percent=
SA @
Elevation=
5950
1190
1109.00
Q2 Area= 0.46 sq. in.
Q5 Area = 0.18 sq. in.
Orifice Area 0.44 sq. in.
Q= 0.014 cfs
......... .. ..
in XF77
COMMENTS
Surface Area , Volume and Orifice are within Design Guideline,,
in

Page 1 of 1
North Carolina
Elaine F. Marshall DEPARTMENTOF THE
Secretary SECRETARY ©F STATE
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PO Box 29622 Raleigh, NC 27626-0622 t919j807-2000
Date: 7/11 /2005
Click here to:
View Document Filings I
Print apre-populated Annual Report Form I File an Annual Report I
Corporation Names
Name Name Type
NC GSSC Properties, LLC Legal
NC GULFSTREAM
SHOPPING CENTER Prev Legal
PROPERTIES, LLC
Limited Liability Company Information
SOSID:
0372282
FID:
561926607
Status:
Current -Active
Date Formed:
6/28/1995
Citizenship:
Domestic
State of Inc.:
NC
Duration:
DEC 2065
Registered Agent
Agent Name:
Registered Office Address
Registered Mailing
Address:
Principal Office Address:
Principal Mailing Address
Vincent, Jon T.
1508 Military Cut -Off Rd, Ste 302
Wilmington NC 28403
1508 Military Cut -Off Rd, Ste 302
Wilmington NC 28403
1508 Military Cut -Off Rd, Ste 302
Wilmington NC 28403
5315 South College Road
Wilmington NC 28412
For questions or comments about the North Carolina Secretary of State's web site, please send e-mail to Webmaster.
http://www.secretary.state.ne.us/Corporations/Corp.aspx?P1temld=4632672 7/11/2005

C200512200465
LIMITED LIABILITY COMPANY
ANNUALREPORT
NAME OF LIMITED LIABILITY COMPANY:
GULFSTREAM SHOPPING CTR, LLC
STATE OF INCORPORATION: NC
SECRETARY OF STATE L.L.C. ID NUMBER: 372282
NATURE OF BUSINESS.
REGISTERED AGENT:
REGISTERED OFFICE MAILING ADDRESS:
REGISTERED OFFICE STREET ADDRESS:
SIGNATURE OF THE NEW REGISTERED AGENT:
PRINCIPAL OFFICE TELEPHONE NUMBER:
PRINCIPAL OFFICE MAILING ADDRESS:
PRINCIPAL OFFICE STREET ADDRESS:
MANAGERSIMEMBERVORGANIZERS:
SOSID: (1372282
Date Filed: 5/2/21105 4:06:00 PM
Elaine F. Marshall
North Carolina Secretary of State
C200512200465
FEDERAL EMPLOYER 10 NUMBER: 561926607
SIGNATURE CONSTITUTES CONSENT TO THE APPOINTMENT
Name:
Name:
Name:
770e:
Title:
7Ttle:
Address:
Address:
Address:
City.,
City.
City
State: ZIP:
State: ZIP:
State: ZIP:
JTIF;TIONO ANNUAL EPORT MUST BE COMPLETED BY ALL LIMITED LIABILITY COMPANIES
A14A k f p-2' _ �Iq Lu�
U E SIG E 8Y A MANAGER/MEMBER DATE
�o+* { . 0"At CC,rT MANAGING MEMBER
TYPE OR PRINT NAME TYPE OR PRINT TITLE
ANN PORT FEE: $200.00 MAIL TO: Secretary of State 0 Corporations 0Ivision • Post Office Box 29525 • Ralaigh, NC 27626-0525
469231
01.21-05

NC DENR - DIVISON OF WATER QUALITY
.0311 CAPE FEAR RIVER BASIN
2B .0300
Classification
Name of Stream Description Class Date Index No.
Cedar Creek
From Cape Fear River to
SA;HQW
08/09/81
18-88-8-2-4
Buzzard Bay
Cape Creek
From source to Cape Fear
SA;HQW
08/09/81
18-88-8-3
River
Bay Creek
From source to Cape Creek
SA;HQW
08/09/81
18-88-8-3-1
Deep Creek
From source to Bay Creek
SA;HQW
08/09/61
18-88-8-3-1-1
Bald Head Creek
From source to Cape Fear
SA;HQW
08/09/81
18-88-8-4
River
Fishing Creek
From source to Bald Head
SA;HQW
08/09/81
18-88-8-4-1
Creek
Bald Head Island Marina
All waters of the basin
SC:#
12/01/87
18-88-8-5
Basin
and entrance channel
Intracoastal Waterway
From Channel Marker F1, R.
SA;HQW
01/01/85
18-88-9
22 to mouth of Cottage Creek
Beaverdam Creek
From source to mouth of
SC;Sw,HQW
08/01/90
18-88-9-1-(0.5)
Polly Gully Creek
Beaverdam Creek
From mouth of Polly Gully
SA;HQW
O1/01/BS
Creek to Intracoastal
Waterway
Polly Gully Creek
From source to Beaverdam
SC;Sw,HQW
08/01/90
18-66-9-1-1
Creek
Elizabeth River
That section of Elizabeth
SA;HQW
O1/01/85
18-88-9-2-(1)
River exclusive of the
Elizabeth River Shellfishing
Area
•

TopoZone - The Web's Topographic Map
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0 0.1 0.2 0.3 0.4 0.5 mi
Map center is 330 57' 30"N, 780 05' 00"W (WGS84/NAD83)
Southport quadrangle M=-8,802
Projection is UTM Zone 17 NAD83 Datum G=1.631.
http://www.topozone.com/print.asp?z=17&n=3761370.04445947&e=769523.3 88698523&s... 7/8/2005

PF
7/1112005
JWH
Oak Island Business Park
Lot 1
05003
Total Drainage Area
s , ft, acres
52,413 1 1.20
impervious Area
Land Use
s . ft.
acres
buildings
10,400
0.24
parking/asphalt
18,100
0.42
sidewalks
1,116
0.03
Total
29,616
0.68
Stormwater Calculations:
Time of Concentration:
Hydraulic Length (L) = 225 ft.
change in Height (H) = 4 ft.
Tc = (L' M) °°' / 128
2.39 min.
Flow for 2 year, 6 hour Storm (Q2):
QPRE _ (CPRE) x (110) x (Area)
1.28 cfs
QPosT = (CPOST) x (110) x (Area)
3.32 cfs
sou atora a uapacity ror z year storm:
CN = (98)(% imp.) + (60)(1-% imp.)
82
P = 3.30 in. for2yr, 6 hr storm
S = 10001CN - 10
= 2.20
Depth (D)= [P-(0.2)(S)12 1 [P+(0.8)(S)j
1.62 in.
Time to Peak Flow:
TP = [(43.5)(D)(Area)] / Q2 POST
26,49 min.
Detention Pond Design:
Pond Size:
Elevation
ft.)
Surface Area
(sq. ft.
Normal Pool
42,50
2,012
Flood Pool
44.25
3,708
Top of Sank
45.50
5,035
Bottom of Pool
37.00
152
% impervious = 0,565
= 56.5%
say 57.0%
CPRE = 0.25
CPOST = (% imp.)(.95)+(1-% imp.)(.25)
12 = 4.25 inlhr
110 = 4.92 inlhr
Flow for 10 year, 6 hour Storm (Q 10):
QPRE _ (CPRE) x (125) x (Area)
= 1.48 cfs
QPosT = (CPOST) x (125) x (Area)
= 3,85 cfs
sou orora e Lapaciiy ror iv year z)torm:
CN = (98)(% imp.) + (60)(1-% imp.)
82
P = 4.82 in. for 10 yr, 6 hr storm
S = 10001CN • 10
= 2.20
Depth (D)= [P-(0.2)(S)]2 I jP+(0.8)(S)1
2.92 in.
Provided Storage Volume:
Vol, _ [(Normal pool SA + Flood Pool SA)121 ,t%111�1181111
x (F,P. elev. - N.P, elev.) ,,�� N CiA -
= 5,005 cu. ft, '� •..•....
= =O��v�ESS1pN9
17374
EQ: �
40
E;k!GilSE.
GR 'GO�,
Time to Peak Flow:
TP = [(43.5)(D)(Area)] 1 Q10,PosT
= 39.70 min.
state Sunace Area Ke ulrement at normal pooi:
Pond side slopes = 3 :1
Depth below N.P. = 5.5 Q.
SAIDA = 0.0366
(Chart for 900,E TSS Removal for Wet Detention
Pond without Vegetative Filter
Required SA = (SAIDA) x (Total Drainage Area)
1,918 s . ft.
State Volume Reouired for Storage of first 1" of runoff
Rv = .05+ .009(% imp)
� = 0,558548
�� V= (Design rainfail)(Rv)(Drainage Area)
2.440 cu. ft.
05003pond 1 of 2
D 71ZV�

MS
�o 0�,�41w2 P r., 0 v�
JA1$ i
P
r�rErt

7/11/2005 Oak Island Business Park 05003
JWH Lot 1
Pond Volume:
Bottom SA = 152 sq. ft.
Normal Pool SA = 2,012 sq. ft.
Vol. _ RN,P. SA + Bottom SA) / 2] x (N.P. el, - Bottom el.)
5.950 cu, ft.
For ebay:
Required Volume Provided Volume
Vol. = 20°% of storage volume Bottom SA = 145 sq. ft.
1,190 cu. ft, Normal Pool SA = 594 sq. ft.
Vol. = ((N.P SA + Bottom SA) / 21 x (N.P. el. - Bottom el.)
1,109 cu. ft.
Outlet Structure Design:
Flow for 2-day drawdown:
for 1 st 1" of stormwater,
Q = Required Vol. / 172,800 sec. (2-days)
0.014 cfs
Required Area of Pipe for 2-day drawdown:
A= Q/ [Cd x SQRT(2 x g x h)]
Cd = 0.6
g = 32.2 ft./s'
h = (F.P. elev.- N.P. elev.) /2
= 0.875 ft.
A = 0.0031 sq. ft.
Diameter of Pioe for 2-dav drawdown:
DIA. = SQRT[(A x 4) 1 pi]
= 0.0632 ft.
0.76 in.
'Use: 0.75 in diameter pipe
Outlet Structure Check:
Using a 4' x 4' Basin,
Perimeter (L) = 16 ft.
Q = CIA
C = (% imp)(95) + (1-°% imp.)(.25)
- 0.65
1 = 4.92 in. for a 25 yr. Storm
A = 1.20 Acres
3,85 cfs
Q= CwxLxH
H = (Q / (Cw x L)]213
Cw = 3
0.19 ft.
Peak elevation = flood pool elevation + H
44.44 ft.
Flow for 5-day drawdown:
for 1st 1" of stormwater,
Q = Required Vol. 1432,000 sec. (5-days)
0.006 cfs
Required Area of Pipe for 5-day drawdown:
A= Q/[Cd xSQRT(2x9xh)]
Cd = 0,6
g = 32.2 ft./sz
h = (F.P. elev, - N.P. elev.) / 2
= 0.875 ft.
A = 0.0013 sq. ft.
Diameter of Pipe for 5-day drawdown:
DIA. = SQRT[(A x 4) 1 pi]
= 0.0400 ft.
0.48 ln.
05003pond 2 of 2

7f 11 I2005
JWH
Oak Island Business Park
Lot 1
05003
LOCATION
AREA
RUNOFF
COEFF.
C
RAIN
INT.
1
inlhr
FLOW
PIPE DATA
FROM
TO
SUB
TOTAL
Acre
TOTAL
Acre
Q=CIA
(C.F.S.
REQ'D
TYPE
N
LENGTH
ft
S %
SIZE
(in)
VEL.
(fps)
Q
AVAIL.
cfs)
HI
INV.
LOW
INV.
ELEV.
HEAD
(ff
Unknown Pie 1
Unknown Pi e 2
0.67
0.90
6,43
3.88
RCP 1
0.013
73
0.14%
18
2.2
3.90
42,70
42.60
0.10
Northern FES
NCDOT DI
0.00
0.67
090
6.43
3,68
RCP
0,013
80
0.259,16
18
2.2
5.27
41.90
41.70
0.20
NCDOT DI
Southern FES
n,12
0.79
0.90
6.43
4,57
RCP
0 013
80
0.25%
15
2.6
5.27
41.70
41.50
0.20
CI No 1
CI No 2
0.10
0.10
0.90
6.43
0.58
RCP
0.013
160
0.13%
12
0.7
1.26
42,70
42.50
0,20
CI No 2
CI No 3
0.12
022
190
7.43
1.45
RCP
0,013
161
0.n9 %
15
12
1.98
42.50
42.35
0.15
CI No 6
CI No 5
0.12
0.12
0.95
7.43
0.81
RCP
0.013
161
0.06%
12
1.0
0.89
42.80
42.70
0,10
CI No 5
CI No 4
0.16
0.28
0.90
8,43
2.12
RCP
0.013
162
0.12%
15
1.7
2.28
42.70
42.50
0.20
CI No 4
CI No 3
0.07
0.35
0.90
9,43
2.93
RCP
0.013
163
0.09%
18
1.7
3,20
42.50
42.35
0.15
CI No Pond 0.06 1 0.63 0.90 9.43 1 5.32 RCP 1 0,013 163 0.06% 1 24 1 17 5.62 42.35 42,25
0.10
Required Zone I (ora I&" Minimum Provided Zone i 16
4.5'x6'x12" 5'x10'x18"
Required Zone 1 fora 24" Minimum Provided Zone 1 24"
6'x8'x12" 10'x15'x18"
Required Zone I for a 30" Minimum Provided Zone 1 30"
7.5'x10'x16" 10'x15'x18"
Required Zone I for a 36" Minimum Provided Zone 1 36"
9'x12'x18" 10'x15'x18"
Required Zone 2 for a 42" Minimum Provided Zone 2 42"
10.5'x21'x18" 15'x25'x18"

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