SW6101104_Cover Letter & Permit_20101221

FRAd
NCDENR
North Carolina Department of Environment and Natural Resources
Beverly Eaves Perdue
Governor
Col. William Johnson
4105 Reedy Creek Road
Raleigh, North Carolina 27601
Division of Water Quality
Coleen H. Sullins
Director
December 21, 2010
Subject: Stormwater Permit No. SW6101104
TUAS Support Facility at Fort Bragg
Cumberland County
Dear Col. Johnson:
Dee Freeman
Secretary
DENR-FRO
JAN 0 3 2011
DWQ
The Stormwater Permitting Unit received a complete Stormwater Management Permit Application for TUAS Support
Facility at Fort Bragg on November 10, 2010. 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 21-1.1000 and Session
Law 2006-246. We are forwarding Permit No. SW6101104, dated December 21, 2010, for the construction, operation
and maintenance of the subject project and the stormwater BMPs.
This permit shall be effective from the date of issuance until December 20, 2020, 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 inspection 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.
This project will be kept on file at the Fayetteville Regional Office. If you have any questions, or need additional
information concerning this matter, please contact Mike Randall at [phone]; or [e-mail].
Sind
for Coleen H. Sullins
cc: Fayetteville Regional Office
SPU Files
Wetlands and Stormwater Branch
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Location: 512 N. Salisbury St. Raleigh, North Carolina 27604
Phone: [phone] FAX: [phone] Customer Service, 1-877-623-6748
Internet: www.ncwaterquality.org
An Equal Opportunity 1 Affirmative Action Employer
NorthCal-olina
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State Stormwater Permit
Permit No. SW61001104
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
North Carolina National Guard
TUAS Support Facility at Fort Bragg located at
Fort Bragg, North Carolina
Cumberland County
FOR THE
construction, operation and maintenance of one bioretention cell and one Dry Extended Detention
Basin in compliance with the provisions of Session Law 2006-246 and 15A NCAC 2H .1000
(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 December 21, 2010, and shall be
subject to the following specified conditions and limitations:
I. DESIGN STANDARDS
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 and 1.7 of this permit. The tract will be limited to the amount of built -
upon area as indicated in Section 1.6 and 1.7 of this permit, and per the application
documents and as shown on the approved plans.
3. 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.
4. The runoff from all built -upon area within the permitted drainage area of this project must be
directed into the permitted stormwater control system.
5. The built -upon areas associated with this project shall be located at least 30 feet landward of
all perennial and intermittent surface waters.
Page 1 of 4

State Stormwater Permit
Permit No. SW61001104 ,
6. The following design criteria have been provided in the bioretention cell and must be
maintained at design condition:
a. Drainage Area, acres:
Onsite, ft2:
Offsite, ft2:
b. Total Impervious Surfaces, ft2:
Onsite, ft2: .
Offsite, ft2:
c. Design Storm, inches:
d. Max. Ponded Depth, feet:
e. Planting Media Depth, feet:
g. Cell Dimensions, feet:
h. Bottom Elevation, fmsl:
i. Surface Area, ft2:
j. Storage Volume, ft3:
k. Temporary Pool Elevation, fmsl:
n. Drawdown Time, hours:
p. Receiving Stream/River Basin:
q. Stream Index Number:
r. Classification of Water Body:
2.92
118,314
8,881
66,216
62,216
4000
1
1.0
3.0
170 feet by 30 feet
228.00
6,394
5,603
232.00
<48.0
Tank Creek / Cape Fear
18-23-27
„C„
The following design criteria have been provided in the Dry Extended Detention Basin and
must be maintained at design condition:
a. Drainage Area, acres:
Onsite, ft2;
Offsite, ft2:
b. Total Impervious Surfaces, ft2:
Onsite, ft2:
Offsite, .ft2:
c. Design Storm, inches:
d. Bottom Elevation, fmsl:
e. Storage Elevation, fmsl:
f. Top Elevation, fmsl:
g. Basin Length, ft.:
h. Basin Width, ft.:
i. Storage Volume, ft3:
j. Drawdown Time, hours:
k. Receiving Stream/River Basin:
I. Stream Index Number:
m. Classification of Water Body:
II. SCHEDULE OF COMPLIANCE
3.2
130,410
8,881
66,422
62,422
4000
1.0
229.00
228.50
234.00
115
15
18,825
72
Tank Creek / Cape Fear
18-23-27
„C„
The permittee shall at all time 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 re -vegetation of slopes and the filter strip.
d. Immediate repair of eroded areas.
e. Maintenance of all slopes in accordance with approved plans.
f. Debris removal and unclogging of all drainage structures, level spreader, filter media,
planting media, underdrains, catch basins and piping.
g. Access to the cell and outlet structure must be available at all times.
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State Stormwater Permit
Permit No. SW61001104
4. Records of maintenance activities must be kept for each permitted BMP. The reports will
indicate the date, activity, name of person performing the work and what actions were taken.
5. The permittee shall maintain and make available to the Division of Water Quality upon
request an annual summary report of the maintenance and inspection records for each BMP.
The report shall summarize the inspection dates, results of the inspections, and the
maintenance work performed at each inspection.
6. The facilities shall be constructed as shown on the approved plans. This permit shall
become void unless the facilities are constructed in accordance with the conditions of this
permit, the approved plans and specifications, and other supporting data.
7. 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 permitted 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.
8. 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.
9. Access to the stormwater facilities shall be maintained at all times.
10. 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.
f. Filling in, altering, or piping of any vegetative conveyance shown on the approved plan.
11. The permittee shall submit final site layout and grading plans for any permitted future areas
shown on the approved plans, prior to construction:,;
12. 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.
13. 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.
III. GENERAL CONDITIONS
The permittee is responsible for compliance with all permit conditions until such time as the
Division approves a request to transfer the permit.
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.
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State Stormwater Permit
Permit No. SW61001104
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 issued shall continue in force and effect until revoked or terminated. The permit
may be modified, revoked and reissued or terminated for cause. The filing of a request for a
permit modification, revocation and re -issuance 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 issuance of this permit does not prohibit the Director from reopening and modifying the
permit, revoking and reissuing the permit, or terminating the permit as allowed by the laws,
rules and regulations contained in Session Law 2006-246, Title 15A NCAC 2H.1000, and
NCGS 143-215.1 et.al.
10. The permittee shall notify the Division in writing of any name, ownership or mailing address
changes at least 30 days prior to making such changes.
11. The permittee shall submit a renewal request with all required forms and documentation at
least 180 days prior to the expiration date of this permit.
Permit issued this the 21 day of December, 2010.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
for C teen H. Sullins, Director
Division of Water Quality
By Authority of the Environmental Management Commission
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State Stormwater Permit
Permit No. SW61001104
North Carolina National Guard
WAS Support Facility at Fort Bragg located at
Fort Bragg, North Carolina
Cumberland 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,
TUAS Support Facility at Fort Bragg located at Fort Bragg, North Carolina
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
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State Stormwater Permit
Permit No. SW61001104
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, per the vegetation plan.
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 2 of 2