SW8091109_HISTORICAL FILE_20220826

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW8 0 '� 1 k 0
DOC TYPE
❑ CURRENT PERMIT
❑ APPROVED PLANS
HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
20 El. 0 `6 Tu
YYYYIMMDD

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

Burd, Tina J
From:
Burd, Tina 1
Sent:
Friday, August 19, 2022 9:56 AM
To:
Barraco CIV Talia M
Subject:
SW8 091109 - -MCC Parking Lot off Holcomb Blvd.
The Wilmington Regional Office of the Division of Energy, Mineral and Land Resources (Stormwater Section) accepted
the Stormwater Permit Renewal Application and S505.00 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 cotiorpondenro to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.
Website: htto://deg.nc.gov/about/divisions/energy-rnineral-land-resources/stormwater
Based on the current guidance to minimize the spread of COVID-ig, the Department of Environmental QQmtlity has adjusted operatimts to
protect the health and safety of the staff and public. Many employees are worhing remotely or are on staggered shifts. To accommodate these
staffing changes, all DEQoffice locations are limiting public, access to appointments only. Please cheep with the appropriate staff before
visiting out offices, as we may be able to handle your requests by phone in email. We appreciate your patience as we con tin tie to serve ttte
public during this challenging title.

Non -Transfer
Completeness Review Checklist
Project Name:
Project County/Location:
C.G P1RQ_ct0G. L01
Permit Action: New New Permit # 2 :
Not located in the ETJ of the follow
and functioning programs:
delegated
NHC: Carolina Beach / Kure Beach /IWilr
Bruns: Leland / Navassa (?) / Oak Island
Cart: Emerald Isle Onsl: JacksonIL
ville
Major Mod / Minor Mod / enewal
Applicant & Permittee are the same?3
Permit Type: C�/ LD / LID Overall / HD &LD Combo
Genera I Permit / Offsite / Exempt + Redeveloprr
Development Type: Commercial/ Residential�516er�
Subdivided?: Subdivision or g e o�
7 Z
Date Delivered to WIRO:
ZO ZZ
RIMS Received/Accepted Date:
/0
Zozz
Date Given to Admin:
p'
RIMS Acknowledged Datei:
ngton / Wrightsville Beach
Pend: Surf City
Existing Permit #:
Expiration Date°:
Rule(s): F-12017 Coastal 02008 Coastal [_]1995 Coastal
11
ElPhase II Universal ID1.988 Coastal
5�S 091► a q
go M(
E�Offsite to SWB:
F�Is Offsite Lot approved in Master Permit?s
Permittee Type & Documents Needed: I[
Property Owner(s) = Purchaser LE]Lessee
=Viable? =Viable? �l�Viable?
=Deed =Purchase Agmt �I�Lease
=HOA =Developer
=Viable? =Viable?
=Election Minutes
Paperwork
®Application �f
®Fee: ®$505 (within 6mo) Check#(s): LJ/ �EII
I�i =No Fee
I
❑Su pplement2 (1 new form or for older forms: 1 original per SCM)
F-1O&M 2
Soils Report (Infil or PP)
Calculations (signed/sealed)
Deed Restrictions, if subdivided
Project Narrative
EIUSGS Map (or onfile?) Subject to SA?: Y / N Subjeet
to ORW?: Y / N
Plans (2 Sets)
NOTES:
t Enter RIMS 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
3If Lot in Master
first.
not approved master permit, STOP. permit needs mod.
EMAILED ENGINEER DATE:
Comments:
�(
REVIEWER NAME:
G:WQ\\\Reference Library\Procedures\Checklists\Completeness Review Checklist 2021 D908

North Carolina Department of Environmental Quality
Pat McCrory
Governor
September 28, 2015
Mr. Neal Paul, Deputy Public Works Officer
MCB Cam pp LeJeune
Building 1005 Michael Road
Camp Lejeune, NC 28547
Subject: USMC Stormwater Permit Extensions (75 Permits — See Attachment A)
Onslow County
Dear Mr. Paul:
Donald R. van der Vaart
Secretary
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].
Sincerel
Tracy Davis, P.E., Director
Division of Energy, Mineral and Land Resources
GDS/kpj: 11\Stormwater\Permits & Pro ec�ts\ Each permit file
cc: Michael Taylor ay or vra email only, [e-mail])
Wilmington Regional Ofice 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: http://portal.ncdenr.org/web/lr/
An Eoual p000nunily'. Affirmative Action Employer- Made in pan by recycled paper

Attarhment A - USMC Proiects - Permit Extensions - 9/29/15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
Permit Number
. Permit .
Version
Original
Issued Date
-
Issued Date
-.
.'Expiration
Date
New Expiration Date
Comments
SW8000401
2
05-16-2000
10-13-2009
05-16-2020
05-16-2024
Extended 9/29/15
SW8010420
1.4
07-03-2001
11-07-2005
11-07-2015
11.07-2019
Extended 9/29/15
SW8011222
2
06-06-2002
12-28-2011
06-06-2022
06-06-2026
Extended 9/29/15
SW8030406
1
06-26-2003
06-26-2003
06-26-2013
1 06-26-2017
Extended 9/29/15
SW8030913
1.3
11-18-2003
06-24-2010
09-21-2019
09-21-2023
Extended 9/29/15
SW8040912
1
01-23-2006
01-23-2006
01-23-2016
01-23-2020
Extended 9/29/15
SW8050817
1.1
09-29-2005
12-18-2008
09-29-2015
09-29-2019
Extended 9/29/15
SW8050830
1.1
05-04-2006
06-02-2011
05-04-2016
05-04-2020
Extended 9/29/15
SW8050925
1
03-13-2006
03-13-2006
03-13-2016
03-13-2020
Extended 9/29/15
SW8051018
12
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 9/29/15
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 9/29/15
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
Iof5

Attachment A - USMC Prniertc - Permit Fvten<innc - o/)4/i 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
Permit
Version
Original
Issued Date
Issued Date
Expiration
Date
New Expiration Date
Comments
SW8080714
1
07-21-2008
07-21-2008
07-21-2018
12-30.2021
Extended 9129/15
SW8080715
1
08-01-2008
08-01-2008
08-01-2018
12-30-2021
Extended 9/29/15
SW8080728
1
07-28-2008
07-28-2008
07-28-2018
12-30.2021
Extended 9/29/15
SW8080734
1
OS-15-2008
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 9/29115
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
12-30-2021
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 9/29/15
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 9129/15
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 9/29/15
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 9/29/15
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 1
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
67
68
69
70
71
72
73
74
75
1
2
3
4
5
6
0
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 9129115
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
02-20-2021
Extended 9/29/15
SW8100214
1
05-07-2010
05-07-2010
05-04-2020
12-28-2021
Extended 9/29/15
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 9/29/15
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
1.1
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 - USMC Proierts - Permit Fxtancinnc - 4/h9/1 r
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
c5
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
04-29-2016
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
03-24-2 111
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
1A
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 1
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
1.1
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

COASTAL SITE DESIGN, PC
PO Box 4041
Wilmington, NC 28406
Phone: [phone]
Fax: [phone]
License 4 C-2710
September 12, 2012
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
LMCC Parking Lot off Holcomb Boulevard
NCDENR/DWQ Permit No. SW8 091109
Camp Lejeune, Onslow County
CSD Project No. 09-021 1-FC-LMCC
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 copy of the as -built stormwater calculations
- one (1) original Designer's Certification
NEC'D SEP 17 2012
r1
We appreciate your assistance in this matter. Please call if you require any additional information.
Sincerely, r
Howard Resnik, PE
Encl.: As noted above
ECEOVEI�
SEP 17 2012
BY:
In

POND ASBUILT CALCULATIONS
For
LMCC PARKING LOT OFF HOLCOMB
SW8 091109
PREPARED FOR
MARINE CORPS BASE
Bld 1005 Michael Road
MCB Camp Lejeune, NC 28547
Prepared by:
COASTAL SITE DESIGN, PC
PO Box 4641
Wilmington, NC 26406
Phone: [phone]
Fax: [phone]
License k C-2710
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Howard Resnik, P.E.
91#111
ECEIVE
SEP 17 2012
BY:

WET DETENTION BASIN CALCULATIONS
LMCC PARKING LOT POND
DETERMINE IMPERVIOUS PERCENTAGE?
area to basin =
50,103
sf
1.15
acres
buildings =
-
sf
-
acres
paved area =
22,446
sf
0.52
acres
sidewalks =
-
sf
-
acres
PH II =
-
sf
-
acres
total impervious surface =
22,446
sf
0.52
acres
total non -impervious surface =
27,657
sf
0.63
acres
percent imp. = 44.8 %
DETERMINE REQUIRED SURFACE AREA
from 90% TSS Removal Chart:
@ depth = 3 it
imp %
SA/DA
40
4.5
44.8
x
50
5.6
x =
5.03
minimum surface area =
0.0503 x
=
2,619 sf
surface area provided = 8,426 sf @ elevation 18.68
1.5" VOLUME DETERMINATION:
DETERMINE RUNOFF COEFFICIENT (Rv)
I = 44.8 percent impervious
Rv = ? (runoff coefficient, inches per inch)
Rv= 0.05+0.009(I)
Rv = 0.45 in/in
DETERMINE VOLUME
design stone =
1.5 inch
Rv =
0.45 in/in
drainage area =
1.15 acres
volume =
?
volume = (design storm)(Rv)(drainage area)
volume = 0.1 acre-ft
volume = 2,839 cf of required storage volume
50,103 sf
COASTAL SITE DESIGN, PC
PO BOX 4041
WILMINGTON, NC 28406

WET DETENTION BASIN STAGE -STORAGE TABLE:
INCREMENTAL
ELEVATION
AREA.
VOLUME
STORAGE
(FT)
(SF)
(Cf)
(cf)
PP 18.68
8,426
-
-
19
9,998
2,948
2,948
State Storage 19.13
10,139
1,309
4,267
20
12,952
10,045
14,301
1.6" storage volume provided
(elev. 19.13) =
4,257
cf
FOREBAY STAGE -STORAGE TABLE:
INCREMENTAL
ELEVATION
AREA
VOLUME
STORAGE
(FT)
(SF)
(cf)
(cf)
14
449
-
15
537
643
643
16
1334
1,086
1,729
17
1,944
1,639
3,368
18
2,798
2,371
5,739
18.68
3,527
2,151
7,889
forebay volume provided =
7,889 cf
PVC DRAW DOWN
Orifice size = 1.25 in
Normal Pool Storage Elev. = 18.68
1.5 storage Elev. = 19.13
Orifice coefficient (C) = 0.6
Average head from 1.5' storage to orifice (h) = (19.13 - 18,68) /3 = 0.15 It
Orifice cross sectional area (A) = pi x r A 2 = 3.14 x (r/12)A2 = 0.00852 sf
Acceleration due to gravity (g) = 32.2 fUsA2
Q=CA (2gh)41/2 = 0.6 x 0.00852 x (2x32.2x0.15)A1/2 = 0.01588 cfs
4,659 / 0.01588 = 267,985 seconds = 3.10 days
COASTAL SITE DESIGN, PC
PO BOX 4041
WILMINGTON, NC 28406