SW8080944_HISTORICAL FILE_20220826

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW8 0 S 0c) Wa
DOC TYPE
❑ CURRENT PERMIT
❑ APPROVED PLANS
HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
2..0 22, 0 � ZCo
YYYYMMDD

Application does not contain the original signature due
to our misplacement of the original submission.
Daniel Sams

Burd, Tina J
From: Burd, Tina J
Sent: Friday, August 19, 2022 10:07 AM
To: Barraco CIV Talia M
Subject: SW8 080944 - MCAS BEQ P634
The Wilmington Regional Office of the Division of Energy, Mineral and Land Resources (Stormwater Section) accepted
the Stormwater Permit Renewal Application and $505.00 fee for the subject project on August 10, 2022. The project has
been assigned to Ashley Smith and you will be notified if additional information is needed.
Best Regards,
Tina Burd
Administrative Associate II
Wilmington Regional Office
Division of Environmental Assistance & Customer Service
Phone [phone]
NCDEQ
Wilmington Regional Office
127 Cardinal Drive Ext.
Wilmington, NC 28405
Email ;orrespoodence to and hom this address is sub%cct to rl?v
North Garohria Public Records Law and may be disclosed to thud parties_
Website: http://deg.nc.gov/about/divisions/energy-mineral-land-resources/stormwater
Based on the an -rent guidance Io minimize the spread of COVID-rq, the Department of Environmental Quality has adjusted Opel a1 ions to
protect the beallh and safety of the staff and public. Matq� employees are working remotely or are on staggered shifts. To accommodate these
offing changes, all DEQaffice locations are limiting public access to appointments only. Please check with the appropriate staff before
visiting our offices, as we may be able to handle your requests by phone o email. We appreciate your patience as we continue to sei ✓e the
public during this challenging tinne.

Non -Transfer Application Completeness Review Checklist
Project Name: 7e AG I4L0126 EtJuSTfil 0049-T&C3 P634
Project County/Location: OAs'a -J / f`ICAS
Permit Action: New New Permit #':
❑Not located in the ETJ of the following delegated
and functioning programs:
7
Date Delivered to WIRO:
2./
Zo2 2
BIMS Received/Accepted Date:
a
/O
Z62Z
Date Given to Admin:
19 dry
r;� a
BIMS Acknowledged Date':
O
o
( q
oxa
NHC: Carolina Beach / Kure Beach / Wilmington / Wrightsville Beach
Bruns: Leland / Navassa (?) / Oak Island
Cart: Emerald Isle Onsl: Jacksonville Pend: Surf City
Major Mod /Minor Mod enewal
®Existing Permit#: 5� o$oRW44
❑Applicant & Permittee are the same?3
Expiration Date°: 1 Z ZG ZZ
Permit Type: r H�LD / LD Overall / HD &LD Combo
General Permit / Offsite / Exempt + Redevelopment
❑Offsite to SW8:
Development Type: Commercial/ Residential her-
❑Is Offsite Lot approved in Master Permit?'
Subdivided?: Subdivision o e Lo
Rule(s): ❑2017 Coastal [Rr2008 Coastal 0199S Coastal
El
Phase II
El
Universal
1:11988
Coastal
Permittee Type & Documents Needed:
®Property Owner(s) IDPurchaser Lessee OHOA Developer
QViable? QViable? QViable? [—]Viable? OVial
D OLease Election Minutes
�Paperwork -
IGJApplication
Fee: ❑$505 (within 6mo) Check#(s): l�l 2E17 ❑No Fee
❑Supplement' (I new form or for older forms: 1 original per SCM)
❑O&M2
❑Soils Report (Infil or PP)
❑Calculations (signed/sealed)
❑Deed Restrictions, If subdivided
❑Project Narrative
❑USGS Map (or on file?) Subject to SA?: Y / N Subject to ORW?: Y / N
❑Plans (2 Sets)
211": +.
'Enter BIMS Acknowledged Date on this Sheet
2For New Projects -Enter New Permit # on Supplements & Deed Restriction Templates
3 If permittee is different, STOP. Needs to be transferred first.
°If w/in 6 months and they are requesting a mod, STOP. Needs a renewal first.
5If Lot not approved in master permit, STOP. Master permit needs mod.
EMAILED ENGINEER DATE:
REVIEWER NAME: B J_5dLEIf
Comments:
G:WQ\\\Reference Library\Procedures\Checklists\Completeness Review Checklist 20210908

North Carolina Department of Environmental Quality
Pat McCrory Donald R. van der Vaart
Governor Secretary
September 28, 2015
Mr. Neal Paul, Deputy Public Works Officer
MCB Ca mpp Lejeune
Buildingg 1005 Michael Road
Camp Lejeune, NC 28547
Subject: USMC Stormwater Permit Extensions (75 Permits — See Attachment A)
Onslow County
Dear Mr. Paul:
On August 5, 2009, the Governor signed Session Law 2009-406. This law impacts any development approval issued by
the Division of Energy, Mineral and Land Resources under Article 21 of Chapter 143 of the General Statutes, which is
current and valid at any point between January 1, 2008, and December 31, 2010. The law extends the effective period of
any stormwater permit that was set to expire during this time frame up to three (3) years from its current expiration date.
On August 2, 2010, the Governor signed Session Law 2010-177, which granted an extra year for an extension of up to
four (4) years.
As a result, 120 USMC Camp Lejeune permits are impacted. Of the 120 permits, 45 permits have previously been
issued extensions and 75 permits have been extended effective today. This is summarized in Attachment A.
If you have any questions, need additional copies of the permit or approved plans, please contact Kelly Johnson with
DEMLR in the Wilmington Regional Office at [phone].
Sincerely,
5�n Tracy Davis, P.E., Director'
Division of Energy, Mineral and Land Resources
GDS/kpj: %StormwaterlPermits & Pr0 ectsl Each permit file
cc: Mchael laylor, ay or via emar only, [e-mail])
Wilmington Regional 0 ice Stormwater File
Division of Energy, Mineral, and Land Resources
Land Quality Section — Wilmington Regional Office
127 Cardinal Drive Extension, Wilmington, North Carolina 28405
[phone] / Fax: [phone] • Internet: httl)://portal,ncdenr.org/web/Ir/
An Eoual O000lunity 1 Affirmative Action Employer - Made in Part by recycled Paper

Attachment A - USMC Proiects - Permit Extensions - 9/29/15
1
2
3
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
Permit Number
• Original.
Issued Date
Issued Date
-Expiration
Date
NewExpirationDate
Comments
SW8000401
05-16-2000
10-13-2009
05-16-2020
05-16-2024
Extended 9/29/15
SW8010420
07-03-2001
11-07-2005
11-07-2015
11-07-2019
Extended 9/29/15
SW8011222
06-06-2002
12-28-2011
06-06-2022
06-06-2026
Extended 9/29/15
SW8030406
105-04-2006
06-26-2003
06-26-2003
06-26-2013
06-26-2017
Extended 9/29/15
SW8030913
11-18-2003
06-24-2010
09-21-2019
09-21-2023
Extended 9/29/15
SW8040912
01-23-2006
01-23-2006
01-23-2016
01-23-2020
Extended 9/29/15
SW8050817
09-29-2005
12-18-2008
09-29-2015
09-29-2019
Extended 9/29/15
SW8050830
06-02-2011
05-04-2016
05-04-2020
Extended 9/29115
SW8050925
1
03-13-2006
03-13-2006
03-13-2016
03-13-2020
Extended 9/29/15
SW8051018
L2
12-13-2005
07-30-2009
12-13-2015
12-13-2019
Extended 9/29/15
SW8051065
1
03-14-2006
03-14-2006
03-14-2016
03.14.2020
Extended 9/29/15
SW8060110
1
02-02-2006
02-02-2006
02-02-2016
02-02-2020
Extended 9/29/15
SW8060137
1
03-03-2006
03-03-2006
03-03-2016
03-03-2020
Extended 9/29115
SW8060147
1
07-13-2010
07-13-2010
07-13-2020
12-31-2021
Extended 9/29/15
SW8060309
1
05-01-2006
05-01-2006
05-01-2016
05-01-2020
Extended 9/29/15
SW8060323
1.2
04-10-2006
10-18-2010
04-10-2016
04-10-2020
Extended 9/29/15
SW8070108
1.2
03-21-2007
01-04-2011
08-19-2019
08-19-2023
Extended 9/29/15
SW8070239
1
03-28-2008
03-28-2008
03-28-2018
12-30-2021
Extended 9/29/15
SW8070708
1
07-16-2007
07-16-2007
07-16-2017
07-16-2021
Extended 9/29/15
SW8070831
1
07-11-2008
07-11-2008
07-11-2018
12-30-2021
Extended 9/29/15
SW8070925
1
10-10-2007
10-10-2007
10-10-2017
10-10-2021
Extended 9/29/15
SW8071034
1.1
12-13-2008
09-23-2010
12-13-2017
03-22-2019
Extended 9/29/15
SW8080126
1
02-06-2008
02-06-2008
02-06-2018
12-31-2021
Extended 9/29115
SW8080510
1
05-30-2008
05-30-2008
05-30-2018
12-30-2021
Extended 9/29/15
SW8080521
1
06-03-2008
06-03-2008
06-03-2018
12-30-2021
Extended 9/29/15
SW8080522
1.1
06-17-2008
08-11-2011
06-17-2018
11-06-2018
Extended 9/29/15
SW8080649
1
07-23-2008
07-23-2008
07-23-2018
12-30-2021
Extended 9/29/15
SW8080653
1
11-19-2008
11-19-2008
11-19-2018
12-30-2021
Extended 9/29/15
1of5

Attachment A - USMC Proiects - Permit Extensinns - 9/qa/1 S
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
Permit Number
Original
Issued Date
issued Date
Expiration
Date
New Expiration Date
Comments
SW8080714
07-21-2008
07-21-2008
07-21-2018
12-30-2021
Extended 9/29/15
SW8080715
108-15-2008
08-01-2008
08-01-2008
08-01-2018
12-30-2021
Extended 9/29/15
SW8080728
07-28-2008
07-28-2008
07-28-2018
12-30-2021
Extended 9/29/15
SW8080734
09-15-2008
09-15-2018
12-30-2021
Extended 9/29/15
SW8080927
1
10-21-2008
10-21-2008
10-21-2018
12-30-2021
Extended 9/29/15
SW8080931
1.1
10-09-2008
09-27-2011
10-09-2018
01-12-2019
Extended 9/29/15
SW8080932
1
10-17-2008
10-17-2008
10-17-2018
12-30-2021
Extended 9/29/15
SW8080933
1
10-20-2008
10-20-2008
10-20-2018
12-30-2021
Extended 9/29/15
SW8080936
1
11-03-2008
11-03-2008
11-03-2018
12-30-2021
Extended 9/29/15
SW8080944
1
11-21-2008
11-21-2008
11-24-2018
01-02-2022
Extended 9/29/15
SW8080945
1.1
11-06-2008
11-17-2011
11-06-2018
12-20-2018
Extended 9/29/15
SW8080950
1
12-03-2008
12-03-2008
12-03-2018
12-30-2021
Extended 9/29/15
SW8081016
1.1
12-03-2008
02-16-2011
12-03-2018
10-17-2019
Extended 9/29/15
SW8081113
1
04-08-2009
04-08-2009
04-08-2019
12-30-2021
Extended 9/29/15
SW8090108
1
04-20-2009
04-20-2009
04-20-2019
1230-2021
Extended 9/29/15
SW8090116
1
03-18-2009
03-18-2009
03-18-2019
12-30-2021
Extended 9/29/15
SW8090117
1
03-13-2009
03-13-2009
03-13-2019
12-30-2021
Extended 9/29115
SW8090330
1
04-23-2009
04-23-2009
04-23-2019
12-30-2021
Extended 9/29/15
SW8090407
1
05-12-2009
05-12-2009
05-12-2019
12-30-2021
Extended 9/29/15
SW8090412
1
07-07-2009
07-07-2009
07-07-2019
12-30-2021
Extended 9/29/15
SW8090517
1.1
08-31-2009
08-26-2011
08-31-2019
01-05-2020
Extended 9/29/15
SW8090625
1
07-28-2009
07-28-2009
07-28-2019
12-30-2021
Extended 9/29/15
SW8090632
1
07-02-2009
07-02-2009
07-02-2019
12-30-2021
Extended 9/29115
SW8090710
1
11-16-2009
11-16-2009
11-16-2019
12.30.2021
Extended 9/29/15
SW8090714
1
09-15-2009
09-15-2009
09-15-2019
12-30-2021
Extended 9/29115
SW8090810
1
09-04-2009
09-04-2009
09-04-2019
12-30-2021
Extended 9/29/15
SW8090814
1
10-26-2009
10-26-2009
10-26-2019
12-30-2021
Extended 9/29/15
SW8090912
1
10-06-2009
10-06-2009
10-06-2019
12-30-2021
Extended 9/29/15
2of5

Attachment A - USMC Proiects - Permit Extensions - 9/29/15
57
58
59
60
61
62
63
64
65
66
69
70
71
72
73
74
75
1
2
3
4
5
6
d
Permit Number
Permit
Version
Original
Issued Date
Issued Date
Expiration
Date
New Expiration Date
Comments
SW8090913
1
10-01-2009
10-01-2009
10-02-2019
12-31-2021
Extended 9/29/15
SW8090918
1
12-01-2009
12-01-2009
12-01-2019
12-30-2021
Extended 9/29/15
SW8091109
- 1
01-15-2010
01-15-2010
01-15-2020
12-30-2021
Extended 9/29/15
SW8091111
1.1
05-07-2010
03-17-2011
05-07-2020
1 02-20-2021
Extended 9/29/15
SW8100214
1
05-07-2010
05-07-2010
05-04-2020
12-28-2021
Extended 9/29115
SW8101106
1
12-09-2010
12-09-2010
12-09-2020
12-31-2021
Extended 9/29/15
SW8921101
1.1
12-16-1992
01-17-2007
01-17-2017
01-17-2021
Extended 9/29/15
SW8950708
- 2
01-08-1996
02-18-2008
02-18-2018
02-18-2022
Extended 9/29/15
SW8950710
2
10-19-1995
02-19-2008
02-19-2018
02-19-2022
Extended 9/29/15
SW8960103
2
03-07-1996
07-08-2008
07-08-2018
07-08-2022
Extended 9/29/15
SW8960509
2
11-04-1996
06-03-2008
06-03-2018
06-03-2022
Extended 9/29/15
SW8970205
2
09-02-1997
03-07-2008
03-07-2018
03-07-2022
Extended 9/29/15
SW8970219
2
10-23-1997
04-14-2010
10-23-2017
10-23-2021
Extended 9/29/15
SW8970408
2
05-15-1997
03-12-2008
03-12-2018
03-12-2022
Extended 9/29/15
SW8970618
1.2
01-28-1998
06-17-2010
09-15-2019
09-15-2023
Extended 9/29/15
SW8970847
2
01-28-1998
03-07-2008
03-07-2018
03-07-2022
Extended 9/29/15
SW8970927
2
06-25-1998
03-07-2008
03-07-2018
03-07-2022
Extended 9/29/15
SW8990624
2
10-22-1999
10-09-2009
10-22-2019
10-22-2023
Extended 9/29/15
SW8990848
2
11-01-1999
10-09-2009
11-01-2019
11-01-2023
Extended 9/29115
SW8010431
1.1
08-08-2001
01-10-2005
01-10-2015
01-10-2019
Previously Extended
SW8010640
2
09-18-2001
02-02-2011
09-18-2025
09-18-2029
Previously Extended
SW8010817
1.1
03-21-2002
12-16-2002
12-16-2012
12-16-2016
Previously Extended
SW8011202
1
06-17-2002
06-17-2002
06-17-2012
06-17-2016
Previously Extended
SW8020113
1.1
06-28-2002
08-20-2009
06-28-2012
06-28-2016
Previously Extended
SW8020319
1A
07-26-2002
11-18-2011
11-18-2021
11-18-2025
Previously Extended
SW8020320
1
06-28-2002
06-28-2002
06-28-2012
06-28-2016
Previously Extended
SW8020504
1
08-12-2002
08-12-2002
08-12-2012
08-12-2016
Previously Extended
SW8020611
1
08-16-2002
08-16-2002
08-16-2012
08-16-2016
Previously Extended
3of5

Attachment A - [AMC Prniartc - Permit Fvtancinnc - q/')4/l c
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
Permit Number
Permit
Version
Original
Issued Date
Issued Date
Expiration
Date
New Expiration Date
Comments
SW8020612
1
08-16-2002
08-16-2002
08-16-2012
08-16-2016
Previously Extended
SW8020725
1
11-05-2002
11-05-2002
11-05-2012
11-05-2016
Previously Extended
SW8020911
1
12-13-2002
12-13-2002
12-13-2012
12-13-2016
Previously Extended
SW8030720
1.3
12-12-2003
12-20-2010
01-26-2015
01-26-2019
Previously Extended
SW8060832 .
1.1
10-06-2006
02-16-2007
10-06-2016
10-06-2020
Previously Extended
SW8070847
2.1
01-24-2008
12-16-2011
07-11-2018
07-26-2018
Previously Extended
SW8070926
1.4
11-16-2007
12-22-2011
11-16-2017
11-16-2021
Previously Extended
SW8071213
1
01-28-2008
01-28-2008
01-28-2018
12-31-2021
Previously Extended
SW8080206
1
03-13-2008
03-13-2008
03-13-2018
12-30-2021
Previously Extended
SW8080301
1.1
04-29-2008
12-11-2008
04-29-2019
05-18-2022
Previously Extended
SW8080313
1
04-29-2008
04-29-2008
04-29-2018
12-30-2021
Previously Extended
SW8080740
1.1
08-22-2008
12-11-2009
08-22-2018
09-10-2020
Previously Extended
SW8080813
1.1
09-25-2008
07-08-2011
09-25-2018
03-20.2019
Previously Extended
SW8080907
1.1
10-08-2008
04-07-2010
10-08-2018
07-02-2020
Previously Extended
SW8081007
1
12-12-2008
12-12-2008
12-12-2018
12-30-2021
Previously Extended
SW8081015
1.2
01-21-2009
04-01-2011
01-20-2019
10-21-2019
Previously Extended
SW8081202
1.1
03-06-2009
08-04-2011
03-06-2019
08-02-2019
Previously Extended
SW8090630
1.3
02-08-2010
06-01-2011
02-08-2020
09-08-2020
Previously Extended
SW8090815
1.1
02-01-2010
04-11-2011
02-01-2020
10-22-2020
Previously Extended
SW8090901
1.1
12-14-2009
03-24-2011
12-14-2019
09-21-2020
Previously Extended
SW8090925
1.1
10-16-2009
02-01-2011
02-01-2021
12-31-2021
Previously Extended
SW8091108
1.1
08-27-2010
10-04-2011
08-27-2020
11-23-2020
Previously Extended
SW8091113
1
04-13-2010
04-13-2010
04-14-2020
01-01-2022
Previously Extended
SW8100406
1
06-28-2010
06-28-2010
06-28-2020
12-31-2021
Previously Extended
SW8100502
1
09-27-2010
09-27-2010
09-27-2020
12-31-2021
Previously Extended
SW8100701
1
09-30-2010
09-30-2010
09-30-2020
12-31-2021
Previously Extended
SW8960117
2
08-06-1996
02-19-2008
02-19-2018
02-19-2022
Previously Extended
SW8960329
2.1
07-09-1996
07-09-2010
02-20-2018
02-20-2022
Previously Extended
4of5

Attachment A - USMC Projects - Permit Extensions - 9/29/15
38
39
40
41
42
43
44
45
-Permit Number
Permit
Version
Original
Issued Date
Issued Date
Expiration
Date
New Expiration Date
Comments
SW8960501
1.1
09-18-1996
12-08-2004
12-08-2014
12-08-2018
Previously Extended
SW8960815
2
10-29-1996
07-14-2008
07-14-2018
07-14-2022
Previously Extended
SW8961204
2
06-30-1997
06-20-2008
06-20-2018
06-20-2022
Previously Extended
SW8970136
2
02-10-1997
07-08-2008
07-08-2018
07-08-2022
Previously Extended
SW8980204
1A
10-02-1998
07-06-2005
07-06-2015
07-06-2019
Previously Extended
SW8980401
2
10-28-1998
06-03-2008
06-03-2018
06-03-2022
Previously Extended
SW8990850
2.1
02-03-2000
12-09-2011
02-03-2020
02-03-2024
Previously Extended
SW8991135
2
08-09-2000
10-28-2009
08-09-2023
08-09-2027
Previously Extended
5of5

REM AUb 28 fflo
COASTAL SITE DESIGN, PC
PO Box 4041
Wilmington, NC 28406
Phone: [phone]
Fax: [phone]
License # C-2710
August 18, 2010
David W. Cox
Environmental Engineer
N.C. Department of Environment
And Natural Resources
Division of Water Quality
127 Cardinal Drive Extension
Wilmington, NC 28405
Re: Pond As -Built & Certification
MCAS P-634 SW8 080944
Camp Lejeune, Onslow County
CSD Project No. 08-0198-634
Dear Mr. Cox:
Enclosed please find the following items for the referenced project:
- original and one (1) copy of the Stormwater Pond As -Built Drawing
- one (1) copy of the Stormwater As -built Calculations
- one (1) original Designer's Certification
We appreciate your assistance in this matter. Please call if you require any additional information.
Sincerely,
RECEIVE
Howard Resnik, PE AUG 2 6 2010
Encl.: As noted above

POND ASBUILT CALCULATIONS
For
WAS P-634
SW8 0809444
PREPARED FOR
MARINE CORPS BASE
Bld 1005 Michael Road
MCB Camp Lejeune, NC 28547
Prepared by:
COASTAL SITE DESIGN, PC
PO Box 4041
Wilmington, NC 28406
Phone: [phone]
Fax: [phone]
License # C-2710
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P-634 WET DETENTION BASIN CALCULATIONS
DETERMINE IMPERVIOUS PERCENTAGE
area to basin =
303,BB4
sf
6.98
acres
buildings =
26,620
sf
0.61
acres
paved area =
93,883
sf
2.16
acres
sidewalks =
17,975
sf
0.41
acres
gravel access =
5,473
sf
0.13
acres
total impervious surface =
143,951
sf
3.30
acres
total non -impervious surface =
159.933
sf
3.67
acres
percent imp. = 47.4
DETERMINE REQUIRED SURFACE AREA
from 90% TSS Removal Chart:
depth =
3 it
im %
SA/DA
40
4.5
47.4
x
50
5.6
x =
5.31
minimum surface area = 0.0531 x 303,884 sf
16,138 sf
surface area provided = 21,159 sf @ elevation 11.32
1.5" VOLUME DETERMINATION:
DETERMINE RUNOFF COEFFICIENT (Rv)
I = 47.4 percent impervious
Rv = ? (runoff coefficient, inches per inch)
Rv= 0.05+0.009(I)
Rv = 0.48 inln
DETERMINE VOLUME
design storm = 1.5 inch
Rv = 0.48 inln
drainage area = 6.98 acres
volume= ?
volume = (design storm)(Rv)(drainage area)
volume = 1 0.4 acre-k
volume = 18,094 cf of required storage volume
COASTAL SITE DESIGN, PC
PO BOX 4041
W ILMINGTON, NC 28406

WET DETENTION BASIN STAGE -STORAGE TABLE:
INCREMENTAL
ELEVATION AREA
VOLUME
STORAGE
(FT) (SF)
(cf)
(cf)
5 4449
6 5441
4,945
-
7 7,121
6,281
-
8 9,526
8,324
-
9 12,002
10,764
-
10 14,548
13,275
-
Bottom Shelf 11 17,163
15,856
-
PP 11.32 21,159
6,132
-
Top Shelf 12 26,474
16,195
16,195
State Storage 12.42 27,892
11,417
27,612
13 30,115
16,822
44,434
14 33,450
31,783
76,217
volume at PP =
69,148
cf
surface area provided at (11.32) =
21,159
of
1.5" storage volume provided (elev. 12.42) =
27,612
cf
minimum forebay volume=
13,830
cf
FOREBAY #1 STAGE -STORAGE TABLE:
INCREMENTAL
ELEVATION AREA
VOLUME
STORAGE
(FT) (SF)
(cf)
(cf)
7 61
8 617
339
339
9 1686
1,152
1,491
10 3,081
2,384
3,B74
11 5,918
4,500
8,374
11.32 7,347
2.122
10,496
forebay volume
provided =
10,496 ct
FOREBAY #2 STAGE -STORAGE TABLE:
INCREMENTAL
ELEVATION AREA
VOLUME
STORAGE
(FT) (SF)
(cf)
(cf)
8.5 361
9 610
243
243
10 1,285
948
1,190
11 2,115
1,700
2,890
11.32 3,088
832
3,723
forebay volume
provided =
3,723 cf
COASTAL SITE DESIGN, PC
PO BOX 4041
WILMINGTON, NC 28406

PVC DRAW DOWN
Orifice size = 2.0 in
Normal Pool Storage Elev. = 11.32
1.5 storage Elev. = 12.42
Orifice coefficient (C) = 0.6
Average head from 1.5' storage to orifice (h) = (12.42 - 11.32) /2 =
0.55 ft
Orifice cross sectional area (A) = pi x rA2 = 3.14 x (r/12)A2 =
0.02181 sf
Acceleration due to gravity (g) =
32.2 1
Q=CA (2gh)A1/2 = 0.6 x 0.02181 x (2x32.2x0.55)A1/2 =
0.07787 cis
27,612 10.07787 = 354,614 seconds =
4.10 days
COASTAL SITE DESIGN, PC
PO BOX 4041
W ILMINGTON, NC 28406