SW8030720_HISTORICAL FILE_20050126

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW8 b3 o72Z)
DOC TYPE
❑ CURRENT PERMIT
❑ APPROVED PLANS
HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
2�o05 o f Z &, _
YYYYMMDD

ATFRQ
Michael F. Easley, Governor
O G William G. Ross, Jr., Secretary
r North Carolina Department of Environment and Natural Resources
0 Alan W. Klimek, P.E. Director
Division of Water Quality
January 26, 2005
Commander L. J. Readal, CDRICECIUSN
Marine Corps Base
1005 Michael Road
Camp Lejeune, NC 28547
Subject: Stormwater Permit No. SW8 030720 Modification
Courthouse Bay Regional Pond
High Density Project
Onslow County
Dear Cdr. Readal:
The Wilmington Regional Office received a complete Stormwater Management Permit
Application for Courthouse Bay Regional Pond on November 2, 2004. Staff review of the
plans and specifications has determined that the project, as proposed, will comply with the
Stormwater Regulations set forth in Title 15A NCAC 2H.1000. We are forwarding Permit No.
SW8 030720 Modification dated January 26, 2005, for the construction of the subject project.
This permit shall be effective from the date of issuance until January 26, 2015, and shall be
subject to the conditions and limitations as specified therein. Please pay special attention to
the Operation and Maintenance requirements in this permit. Failure to establish an adequate
system for operation and maintenance of the stormwater management system will result in
future compliance problems.
If any parts, requirements, or limitations contained in this permit are unacceptable, you have
the right to request an adjudicatory hearing upon written request within thirty (30) days
following receipt of this permit. This request must be in the form of a written petition,
conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of
Administrative Hearings, P.O. Drawer 27447, Raleigh, NC 27611-7447. Unless such demands
are made this permit shall be final and binding.
If you have any questions, or need additional information concerning this matter, please
contact Rhonda Hall, or me at [phone].
Sincerely,. _
Ed Beck
Acting' Regional Supervisor
Surface Water Protection Section
ENB/rbh: S:IWQSISTORMWATIPERMIT1030720mod.jan05
cc: Joe Avolis, P.E., Avolis Engineering
Rhonda Hall
Wilmington-Region al_Office
Central Files
North Carolina Division of Water Quafity 127 Cardinal Drive Extension Phone [phone] Customer 5ervicel-877-623-6748
Wilmington Regional Office Wilmington, NC 28405-3845 FAX [phone] Internet: h2o.enr.state.nc.us One
NorthCarolina
An Equal opportunity/Affirmative Action Employer— 50% Recycled110% Post Consumer Paper vVaturally

State Stormwater Management Systems
Permit No. SW8 030720 Modification
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
STATE STORMWATER MANAGEMENT PERMIT
HIGH DENSITY DEVELOPMENT
In accordance with the provisions of Article 21 of Chapter 143, General Statutes of
North Carolina as amended, and other applicable Laws, Rules, and Regulations
PERMISSION IS HEREBY GRANTED TO
Commanding General, Camp Lejeune MCB
Courthouse Bay Regional Pond
Onslow County
FOR THE
construction, operation and maintenance of a wet detention pond in compliance with
the provisions of 15A NCAC 2H . 1 000.(hereafter referred to as the "stormwater rules')
and the approved stormwater management plans and specifications and other
supporting data as attached and on file with and approved by the Division of Water
Quality and considered a part of this permit.
This permit shall be effective from the date of issuance until January 26, 2015, and
shall be subject to the following specified conditions and limitations:
I. DESIGN STANDARDS
1. This permit is effective only with respect to the nature and volume of stormwater
described in the application and other supporting data.
2. This stormwater system has been approved for the management of stormwater
runoff as described in Section 1.6 on page 3 of this permit. The stormwater ..
control has been designed to handle the runoff from 1,621,289 square feet of
impervious area. This pond must be operated with a 30' vegetated filter.
3. The tract will be limited to the amount of built -upon area indicated on page 3 of
this permit, and per approved plans. The built -upon area for the future
development is limited to 76,520 square feet.
4. All stormwater collection and treatment systems must be located in either
dedicated common areas or recorded easements. The final plats for the project
will be recorded showing all such required easements, in accordance with the
approved plans.
5. The runoff from all built -upon area within the permitted drainage area of this
project must be directed into the permitted stormwater control system.
Page 2 of 8

State Stormwater Management Systems
Permit No. SW8 030720 Modification
6. The following design criteria have been provided in the wet detention pond and
must
be maintained at design condition:
Entire Pond
Phase I
Future Phase
a.
Drainage Area, acres:
77.85
45.81
32.04
Onsite, ft2:
2,996,035,30
1,995,400
1,000,635.30
Offsite, ft2:
395,067.70
0
395,067.70
b,
Total Impervious Surfaces, ft2:
1,621,289
652,697
968,592
Existing ft2:
518,200
201,376
316,824
Proposed On -site ft2:
765,209
451,321
313,888
Offsite ft2: (from SW8 010431)
261,360
0
261,360
Future ft2:
76,520
0
76,520
C.
Design Storm, inches:
1
1
1
d.
Pond Depth, feet:
4.0
4.0
4.0
e.
TSS removal efficiency:
85%
85%
85%
(a 30' vegetated filter is required)
f.
Permanent Pool Elevation, FMSL:
7.38
7.38
7.38
g.
Permanent Pool Surface Area, ft2:
133,239
41',854
91,385
h.
Permitted Storage Volume, W:
172,597
67,831
104,766
i.
Temporary Storage Elevation, FMSL,.
8.92
8.92
8.92
).
Controlling Orifice:
8 each @
3 each @
5 each @
2" 0 pipes
2" O pipes
2" O pipes
k.
Permitted Forebay Volume, fP-.
106,582
25,427
81,155
I.
Receiving Stream/River Basin:
New River/White Oak
M.
I Stream Index Number:
WOK02 19-(15.5)
n.
Classification of Water Body:
SC NSW
Page 3 of 8

State Stormwater Management Systems
Permit No. SW8 030720 Modification
II. SCHEDULE OF COMPLIANCE
Phase I of the stormwater management system shall be constructed in its
entirety, vegetated and operational for its intended use prior to the construction
of any built -upon surface associated with Phase I of the project (US Joint
Maritime Operations and Training Facilities, Permit Number SW8 041104).
2. The entire stormwater management system shall be constructed in its entirety,
vegetated and operational for its intended use prior to the construction of any
additional built -upon surface not associated with Phase I of the project (US Joint
Maritime Operations and Training Facilities, Permit Number SW8 041104).
3. During construction, erosion shall be kept to a minimum and any eroded areas of
the system will be repaired immediately.
4. The permittee shall at all times provide the operation and maintenance
necessary to assure the permitted stormwater system functions at optimum
efficiency. The approved Operation and Maintenance Plan must be followed in
its entirety and maintenance must occur at the scheduled intervals including, but
not limited to:
a. Semiannual scheduled inspections (every 6 months).
b. Sediment removal.
C. Mowing and revegetation of slopes and the vegetated filter.
d. Immediate repair of eroded areas.
e. Maintenance of all slopes in accordance with approved plans and
specifications. '.
f. Debris removal and unclogging of outlet structure, orifice device, flow
spreader, catch basins and piping.
g. Access to the outlet structure must be available at all times.
5. Records of maintenance activities must be kept and made available upon
request to authorized personnel of DWQ. The records will indicate the date,
activity, name of person performing the work and what actions were taken.
6. Decorative spray fountains will be allowed in the stormwater treatment system,
subject to the following criteria:
a. The fountain must draw its water from less than 2' below the permanent
pool surface.
b. Separated units, where the nozzle, pump and intake are connected by
tubing, may be used only if they draw water from the surface in the
deepest part of the pond.
c. The falling water from the fountain must be centered in the pond, away
from the shoreline.
d. The maximum horsepower for a fountain in this pond is 112 horsepower.
7. The facilities shall be constructed as shown on the approved plans. This permit
shall become voidable unless the facilities are constructed in accordance with
the conditions of this permit, the approved plans and specifications, and other
supporting data.
8. Upon completion of construction, prior to issuance of a Certificate of Occupancy,
and prior to operation of this permitted facility, a certification must be received
from an appropriate designer for the system installed certifying that the perr-nitted
facility has been installed in accordance with this permit, the approved plans and
specifications, and other supporting documentation. Any deviations from the
approved plans and specifications must be noted on the Certification. A
modification may be required for those deviations.
Page 4 of 8

State Stormwater Management Systems
Permit No. SW8 030720 Modification
9. If the stormwater system was used as an Erosion Control device, it must be
restored to design condition prior to operation as a stormwater treatment device,
and prior to occupancy of the facility.
10. Access to the stormwater facilities shall be maintained via appropriate
easements at all times.
11. The permittee shall submit to the Director and shall have received approval for
revised plans, specifications, and calculations prior to construction, for any
modification to the approved plans, including, but not limited to, those listed
below:
a. Any revision to any item shown on the approved plans, including the
stormwater management measures, built -upon area, details, etc.
b. Project name change.
C. Transfer of ownership.
d. Redesign or addition to the approved amount of built -upon area or to the
drainage area.
e. Further subdivision, acquisition, lease or sale of all or part of the project
area. The project area is defined as all property owned by the permittee,
for which Sedimentation and Erosion Control Plan approval or a CAMA
Major permit was sought.
f. Filling in, altering, or piping of any vegetative conveyance shown on the
approved plan.
12. The permittee shall submit final site layout and grading plans for any permitted
future areas shown on the approved plans, prior to construction.
13. A copy of the approved plans and specifications shall be maintained on file by
the Permittee for a minimum of ten years from the date of the completion of
construction.
14. The permittee must maintain compliance with the proposed built -upon area and
ensure that the runoff from all the built -upon area is directed into the permitted
system.
15. The Director may notify the permittee when the permitted site does not meet one
or more of the minimum requirements of the permit. Within the time frame
specified in the notice, the permittee shall submit a written time schedule to the
Director for modifying the site to meet minimum requirements. The permittee
shall provide copies of revised plans and certification in writing to the Director
that the changes have been made.
15. The permittee must maintain the current permitted drainage area. No runoff
from outside of the permitted drainage area boundary may enter the permitted
stormwater facilities without first applying for and receiving a permit modification.
III. GENERAL CONDITIONS
This permit is not transferable except after notice to and approval by the Director.
In the event of a change of ownership, or a name change, the permittee must
submit a formal permit transfer request to the Division of Water Quality,
accompanied by a completed name/ownership change form, documentation
from the parties involved, and other supporting materials as may be appropriate.
The approval of this request will be considered on its merits and may or may not
be approved. The permittee is responsible for compliance with all permit
conditions until such time as the Division approves the transfer request.
Page 5 of 8

State Stormwater Management Systems
Permit No. SW8 030720 Modification
2. Failure to abide by the conditions and limitations contained in this permit may
subject the Permittee to enforcement action by the Division of Water Quality, in
accordance with North Carolina General Statute 143-215.6A to 143-215.6C.
3. The issuance of this permit does not preclude the Permittee from complying with
any and all statutes, rules, regulations, or ordinances, which may be imposed by
other government agencies (local, state, and federal) having jurisdiction.
4. In the event that the facilities fail to perform satisfactorily, including the creation
of nuisance conditions, the Permittee shall take immediate corrective action,
including those as may be required by this Division, such as the construction of
additional or replacement stormwater management systems.
5. The permittee grants DENR Staff permission to enter the property during normal
business hours for the purpose of inspecting all components of the permitted
stormwater management facility.
6. The permit may be modified, revoked and reissued or terminated for cause. The
filing of a request for a permit modification, revocation and reissuance or
termination does not stay any permit condition.
7. Unless specified elsewhere, permanent seeding requirements for the stormwater
control must follow the guidelines established in the North Carolina Erosion and
Sediment Control Planning and Design Manual.
8. Approved plans and specifications for this project are incorporated by reference
and are enforceable parts of the permit.
9. The permittee shall notify the Division any name, ownership or mailing address
changes within 30 days.
Permit issued this the 261h day of January, 2005.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
Alan vv. KiimeK, i .t., Director
Division of Water Quality
By Authority of the Environmental Management Commission
Page 6of8

State Stormwater Management Systems
Permit No. SW8 030720 Modification
Courthouse Bay Regional Pone
Stormwater Permit No. SW8 030720Modification
Onslow County
Designer's Certification
I, , as a duly registered
in the State of North Carolina, having been authorized to observe (periodically/ weekly/
full time) the construction of the project,
(Project)
for (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
Registration Number
Date
SEAL
Page 7 of 8

State Stormwater Management Systems
Permit No. SW8 030720 Modification
Certification Requirements:
1. The drainage area to the system contains approximately the permitted
acreage.
2. The drainage area to the system contains no more than the permitted
amount of built -upon area.
3. All the built -upon area associated with the project is graded such that the
runoff drains to the system.
4. All roof drains are located such that the runoff is directed into the system.
5. The outlet/bypass structure elevations are per the approved plan.
6. The outlet structure is located per the approved plans.
7. Trash rack is provided on the outlet/bypass structure.
8. All slopes are grassed with permanent vegetation.
9. Vegetated slopes are no steeper than 3:1.
10. The inlets are located per the approved plans and do not cause short-
circuiting of the system.
.11. The permitted amounts of surface area and/or volume have been
provided.
12. Required drawdown devices are correctly sized per the approved plans.
13. All required design depths are provided.
_14. All required parts of the system are provided, such as a vegetated shelf,
and a forebay.
_15. The required system dimensions are provided per the approved plans.
cc: NCDENR-DWQ Regional Office
Page 8 of 8

MEMORANDUM
To. Valery Stephens
From: Linda Lewis
Date: June 8, 2004
Subject: Application Fee Refund
Project Name: Courthouse Bay Regional Stormwater Pond
Project Number: SW8 030720
Onslow County
Dear Valery:
Please refund $420.00 to the below named person. This was a plan revision,
which did not require a $420.00 application fee.
Check Number: 8005
Deposit Number: 133165
Deposit Date: March 30, 2004
Please make the check payable to and send to:
Mr. Joe Avolis, P.E.
Avolis Engineering, PA
PO Box 15564
New Bern, NC 28561
Federal Tax ID Number: 56-1662324
Thank you for your speedy response.
RSSlarl: S:1WQSISTORMWATIREFUND1030720.jun04
cc: Cdr. B.D. Pina, USMC Base Camp Lejeune
Linda Lewis
Central Files

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�- L 1
March 1, 2004
AVQLIS ENGINEERING, P.A.
P.O. Box 15564 • New Bern, North Carolina 28561 • [phone]
Mrs. Linda Lewis
Environmental Engineer
NCDENR
127 Cardinal Drive Extension
Wilmington, NC 28405-3845
RE: Modification to Stormwater Permit #SW8030720, Regional Stormwater Pond
Courthouse Bay Area, Marine Corps Base Camp Lejeune, North Carolina
Dear Linda:
Enclosed please find our submittal for the above -referenced project consisting of the following:
• Stormwater Permit Application and Wet Detention Basin Supplement
(Original and One Copy)
• Stormwater Narrative (Two Copies)
• Applicable Plan Sheets (Two Copies)
• S420 Application Fee
1rjo
t� 1✓
MAR 2
This project is the same as originally permitted with the exception that the strip 6f-FH—d-thEQQ
the pond is being removed and the overhead steam line that is located on the strip is being
relocated. The pond surface area, the depth and the outlet structures are all remaining
unchanged. The pond length has been changed to account for the increased surface area. Two
expansion turns in the steam line are being relocated on the eastern side of the pond, and the
pond contours in this area are being straightened. Again, the pond overall length has been
adjusted to keep the exact same surface area and volume.
We have also specified that the earthen barriers for the forebays be lined with rip rap. Marine
Corps Base Camp Lejeune has indicated that these earthen structures often wash out and require
maintenance. We have added the rip rap to the typical cross section of the pond and forebay.

1
+V'c;ur assistance with this project is appreciated. Should you have any questions or need any
additional information, please do not hesitate to call.
Sincerely,
)lls, P.E.

OF W A 7-F� Michael F. Easley, Governor
�a Q William G. Ross Jr., Secretary
�North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.I;.,Director
p Division of Water Quality
Coleen H. Sullins, Deputy Director
Division of Water Quality
June 4, 2004
Cdr. Ben D. Pina, CDR, CEC, USN
Commanding General MCB Camp Lejeune
1005 Michael Road
Camp Lejeune, NC 28547
Subject: Approved Plan Revision
Courthouse Bay Regional Stormwater Pond
Stormwater Project No. SW8 030720
Onslow County
Dear Cdr. Pina:
On March 25, 2004, the Wilmington Regional Office received a plan revision for
Stormwater Management Permit Number SW8 "030720. The revisions include the
removal of the existing steam line and subsequent change to the pond layout. The
length of the pond was changed so that the same surface area and volume as
previously permitted are provided. It has been determined that a formal permit
modification is not required for the proposed changes. We are forwarding you an
approved copy of the revised plans for your files. Please replace the old approved plan
sheets with the new ones.
Please be aware that all terms and conditions of the permit issued on December 12,
2003, remain in full force and effect. Please also understand that the approval of this
revision to the approved plans for the subject State Stormwater Permit is done on a
case -by -case basis. Any other changes to this project must be approved through this
Office prior to construction.
The $420.00 application fee is being refunded to Avolis Engineering under separate
cover. If you have any questions concerning this matter, please do not hesitate to call
me at (910) 39573900.
Sincerely,
Linda Lewis
Environmental Engineer
RSSlarl: S:1WQSISTORMWATIREVISION1030720.jun04
cc: Joseph Avolis, P.E., Avolis Engineering
Linda Lewis
Wilmington Regional Office
Central Files
N. C, Division of Water Quality 127 Cardinal Drive Extension [phone] Customer Service
Wilmington Regional Office Wilmington, NC 28405 [phone] Fax [phone] 'NIDENH

WET DETENTION POND ANALYSIS
FILE NAME: G:IDATAIWPDATAIWQSIPOND1030720Ultimate.WK1
PROJECT #: SW8 0307201-11Itimate REVIEWER: R.Hall
PROJECT NAME: Courthouse Bay Regional Pond DATE: 25-Jan-05
Receiving Stream: New River Class: SC NSW
Drainage Basin: White Oak Index No. WOK02 19-(15.5)
Site Area 86.63 acres
Drainage Area 3391 fqJ 7 > square feet Area in Acre 77.85
IMPERVIOUS AREAS
Rational C
Existing
518200.00
square feet
0.95
Proposed
765209.00
square feet
0.95
SW8 010431
261360.00
square feet
0.95
Reserve
76520.00
square feet
0.95
square feet
square feet
TOTAL 1;21289 0; square feet Rational Cc= 0.61
SURFACE AREA CALCULATION
% IMPERVIOUS 47.81 %
Des. Depth 4
TSS: 85
SA/DA Ratic
3.15%
Req. SA
106708 sf
Prov. SA
VOLUME CALCULATION * place a "1" in the box if Rational is used
Rational ?*
1
Des. Storm
:,::>>0C)'
in
Rv=
0.480
Bottom
3.38 msl
Perm. Pool
„.;..;.,;7..;.38: msl
Design Pool
8.92 msl
Storage met @eiev
8.92 msl
Req. Volume
17297;
cf
Vol. Prov. at DP
172388 ::
cf
RIFICE CALCULATION
FOREBAY
Perm. Pool Volume=
521674
Req. Forebay Volume=
104334.8
Provided Volume=
106582.00
Percent=
Elevation Area
Inc. Vol. Acc. Vol.
8.20 139972.00
68303.00 68303.00
9.20 149152.00
144562.00 212855,00
Avg. Head =
0.73
ft
Q2 Area = 35.00
sq. inches
Flow Q2, cfs
0.999
cfs
Q5 Area = 14.00
sq. inches
Flow Q5, cfs
0.400
cfs
Orifice Area 25.13
sq. inches
No. of Orifices
::::;::'f
Q= 0.717
cfs
Diameter, inches
....... 06,
weir H x W
in
x
in
Drawdown =
785:;
days
Surface Area @DP =
90641 sq. ft.
Falling Head Drawdown =
3.8 days
COMMENTS
Surface Area , Volume and Orifice are within Design Guidelines.

1