HomeMy WebLinkAboutSW6101102_HISTORICAL FILE_20110128STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW &Za1z,4t
DOC TYPE
❑ CURRENT PERMIT
❑ APPROVED PLANS
HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
YYYYM M DD
N
w :✓
NCDENR
North Carolina Department of Environment and Natural Resources
Beverly Eaves Perdue
Governor
Mr. Craig Lantz
Fort Bragg DPW - WMB
2175 Reilly Road Stop A
Fort Bragg, INC 28310-5000
Division of Water Quality
Coleen H. Sullins
Director
January 26, 2011
Dee Freeman
Secretary
E)E VF —FF?®
JAN 2 8 2011
Subject: Stormwater Permit No. SW6101102 — PLAN REVISION [)WQ
Warrior in Transition Complex - Barracks �Y
High Density Bio-Retention & Infiltration Trench Project
Cumberland County
Dear Mr. Lantz
The Stormwater Permitting Unit received a plan revision request to revise Stormwater
Management Permit for Warrior in Transition Complex - Barracks on January 24, 2011. Staff
review of the plan revision has determined that the project, as proposed, will comply with the
Stormwater Regulations set forth in Title 15A NCAC 2H.1000 and Session Law 2006-246. We
are forwarding a revised Permit No. SW6101102, dated January 26, 2011, 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 8, 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.
2.36 acres of existing impervious area will be removed from the site. This will allow for 2.06
acres of the new 7.46 acres total impervious area to not be treated. This plan revision
increased the impervious area that is not treated from 1.94 acres to 2.06 acres; which is
still less than the amount of existing impervious area being removed.
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 to 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 Robert Patterson at (919)
807-6375; or robert.patterson@ncdenr.gov.
Wetlands and Stormwater Branch
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Locabon: 512 N. Salisbury St. Raleigh, North Carolina 27604
Phone: 919-807.63001 FAX: 919-807-64941 Customer Service: 1-877-623-6748
Internet: vi w it waterquality.org
An Equal Opportunity 1 Affirmative Action Employer
NorthCarolina
Naturally
Mr. Craig Lantz
SW6101 102 — Warrior in Transition Complex - Barracks
January 26, 2011
C
Sincerely,
for/Colleee�nn H. Sullins
cc: Fayetteville Regional Office
SW6101102 File
ec: Mr. Donnie Stovall — Civil Consultants of AL, Inc.
Page 2 of 2
State Stormwater Permit
Permit No. SW6101102
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
Fort Bragg Directorate of Public Works
Warrior in Transition Complex - Barracks
NW corner of Normandy Dr. & Half St., Fort Bragg, Cumberland County
FOR THE
construction, operation and maintenance of eight bioretention cells and two
underground infiltration trenches 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 8, 2020, 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 1.8 and 1.9 of this permit. The stormwater control
has been designed to handle the runoff from 240,190 square feet of impervious
area. An additional 2.06 acres of impervious area will not be treated based on
existing impervious area credit.
3. In lieu of the overflow from the infiltration trenches going to vegetated filter strips,
the overflow for trench 1 will sheet flow through a vegetated slope into a dry
detention basin; and the overflow for trench 2 will go into another dry detention
basin.
4. The tract will be limited to the amount of built -upon area indicated in Section 1.8
and 1.9 of this permit, and per approved plans.
Page 1 of 9
State Stormwater Permit
Permit No. SW6101102
91
All stormwater collection and treatment systems must be located in either
dedicated common areas or recorders easements. The final plats for the project
will be recorded showing all such required easements, in accordance with the
approved plans.
The runoff from all built -upon area within the permitted drainage area of this
project must be directed into the permitted stormwater control system.
The built -upon areas associated with this project shall be located at least 30 feet
landward of all perennial and intermittent streams.
The following design criteria have been provided in the infiltration trenches and
must be maintained at design condition:
a. Drainage Area, 9cres:
Onsite, ft :
Offsite, ft2:
b. Total Imperviou? Surfaces, ft2:
Onsite, ft :
Offsite, ft2:
C. Design Storm, inches:
d. Trench Length ft:
e. Trench Width, ft:
f. Trench Height, ft:
g. Perforated Pipe Diameter / Length:
h. Bottom Elevation, FMSL:
i. Bypass Weir Elevation, FMSY
j. Permitted Storage Volume, ft
k. Type of Soil:
I. Expected Infiltration Rate, in/hr:
M. Seasonal High Water Table, FMSL:
n. Time to Draw Down, days:
o. Receiving Stream: UT to
P. Stream Index Number:
q. Classification of Water Body:
r. River Basin:
Trench 1 Trench 2
1.72
5.84
75,135
254,390
0
0
52,961
134,869
52,961
134,869
.0
0
1.0
1.0
310.0 -
185.0
18.0
14.0
3.0
6.5
no pipe
60" / 379'
305.5
295.37
309.0
301.87
6,696
11,363
Clayey Sand
Silty Sand
0.67
2.25
302.0
293.0
3.73
1.89
Beaver Crk
UT to Tank Crk
18-31-24-5
18-23-27
„C"
„C„
Cape Fear
Cape Fear
Page 2 of 9
State Stormwater Permit
Permit No. SW6101102
N
The following design criteria have been provided in the bioretention cells and
must be maintained at design condition:
a. Drainage Area, ?cres:
Onsite, ft :
Offsite, ftz:
b. Total Impervious Surfaces, ftz:
Onsite, ft :
Offsite, ftz:
C. Design Storm; inches:
d. Ponding Depth, inches:
e. SHWT, fmsl:
f. Planting Media Depth, feet:
g. Cell Dimensions, feet:
h. Planting Elevation, fmsl
i. Bottom Surface Area, ft2:
j. Permitted Storage Volume, ft3:
k. Bypass / Storage Elevation, fmsl
I. Drawdown Time, hours:
M. Underdrain Diameter, inches:
n. Total number of plants provided:
o. Receiving Stream/River Basin:
P. Stream Index Number:
q. Classification of Water Body:
(9 continues on page 4)
Cell 1 Cell 2
0.27
0.14
11,761
5,969
0.
0
4,020
2,472
4,020
2,472
0
0
1.0
1.0
12
12
300.0
300.0
2.0
2.0
60x21
57x27
313.5
316.5
1,260
1,539
1,260
1,539
314.5
317.5
36
36
6.0
6.0
grass sod
grass sod
UT to Beaver Crk / Cape Fear
18-31-24-5
„C„
Page 3 of 9
State Stormwater Permit
Permit No. SW6101102
9 continued
Cell
Cell
Cell
Cell
Cell
Cell
a.
Drainage Area, acres:
0.29
0.37
0.41
0.34
0.32
0.36
Onsite, ft :
12,632
16,268
17,995
14,810
13,939
15,682
Offsite, ft2:
0
0
0
0
0
0
b.
Total Impervious Surfaces, ft2:
6,200
6,260
7,877
7,900
7,810
9,821
Onsite, ft :
6,200
6,260
7,877
.7,900
7,810
9,821
Offsite, ft2:
0
0
0
0
0
0
C.
Design Storm, inches:
1.0
1.0
1.0
1.0
1.0
1.0
d.
Ponding Depth, inches:
12
12
12
12
12
12
e.
SHWT, fmsl:
307.5
307.5
307.5
307.5
307.5
307.5
f.
Planting Media Depth, feet:
2.0
2.0
2.0
2.0
2.0
2.0
g.
Cell Dimensions, feet:
60x22
90x22
105x28
71x10
64x16
64x16
h.
Planting Elevation, fmsl
316.5
316.5
315.5
317.5
316.5
316:5
i.
Bottom Surface Area, ft2:
1,320
1,980
2,940
710
1,024
1,024
j.
Permitted Storage Volume, ft3:
1,320
1,980
2,940
710
1,024
1,024
k.
Bypass / Storage Elevation, fmsl:
317.5
317.5
316.5
318.5
317.5
317.5
I.
Drawdown Time, hours:
36
36
36
36
36
36
M.
Underdrain Diameter, inches:
6.0
6.0
6.0
6.0
6.0
6.0
n.
Total number of plants provided:
grass sod
grass sod
grass sod
grass sod
grass sod
grass sod
o.
Receiving Stream/River Basin:
UT to Beaver Crk /
Cape Fear
P.
Stream Index Number:
18-31-24-5
q.
Classification of Water Body:
"C"
Page 4 of 9
State Stormwater Permit
Permit No. SW6101102
II. SCHEDULE OF COMPLIANCE
1. 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.
2. During construction, erosion shall.be kept to a minimum and any eroded areas of
the system will be repaired immediately.
3. 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 bypass structure, filter media, flow
spreader, catch basins, piping and vegetated filter.
g. A clear access path to the bypass structure must be available at all times.
4. Records of maintenance activities must be kept for each permitted BMP. The
records will indicate the date, activity, name of person performing the work and
what actions were taken.
5. The permittee shall submit to the Division of Water Quality 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 voidable unless the facilities are constructed in accordance with
the conditions of this permit, the approved plans and specifications, and other
supporting data.
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 via appropriate
easements at all times.
Page 5 of 9
State Stormwater Permit
Permit No. SW6101102
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, inc!uding, 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.
10. The permittee shall submit final site layout and grading plans for any permitted
future areas shown on the approved plans, prior to construction.
11. 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.
12. 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
1. This permit is not transferable to any person or entity 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 completed. Name/Ownership Change form
to the Division of Water Quality, signed by both parties, and accompanied by the
supporting documentation as listed on page 2 of the form. The approval of this
request will be considered on its merits and may or may not be approved.
2. The permittee is responsible for compliance with all permit conditions until such
time as the Division approves the transfer request.
3. 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.
4. 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.
5. 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.
6. 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.
Page 6 of 9
State Stormwater Permit
Permit No. SW6101102
,r
7. 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 reissuance or .
termination does not stay any permit condition.
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.
Approved plans and specifications for this project are incorporated by reference
and are enforceable parts of the permit.
10. 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 21-1.1000, and NCGS 143-215.1 et.al.
11. The permittee shall notify the Division in writing of any name, ownership or
mailing address changes at least 30 days.
12. 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 26rh day of January, 2011.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
Division of Water Quality
By Authority of the Environmental Management Commission
Page 7 of 9
State Stormwater Permit .
Permit No. SW6101102
Warrior in Transition Complex - Barracks
Stormwater Permit No.-.SW6101102
Cumberland Countv
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 8 of 9
State Stormwater Permit
Permit No. SW6101102
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 bypass structure elevations are per the approved plan.
6. The bypass structure is located per the approved plans.
7. A 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. All required design depths are provided.
13. All required parts of the system are provided.
14. The required system dimensions are provided per the approved plans.
Submit this Designer's Certification to:
DWQ Fayetteville Regional Office
Surface Water Protection
225 Green Street
Systel Bldg. Suite 714
Fayetteville, NC 28301-5043
Page 9 of 9
LCI /CIVIL CONSULTANTS of AL INC.
3525 Vann Road, Suite 105, Birmingham, AL 35235
Phone: (205) 655-1991 FAX: (205) 655-8366
January 20, 2011
Mr. Robert Patterson
NC Department of Environmental and Natural Resources
DWQ — Wetlands Stormwater Branch
512 N. Salisbury St.
Raleigh, NS 27604
Re: Ft Bragg WIT Barracks —DWQ Submittal SW6101102
Dear Mr. Patterson
This letter is to request a site plan revision to the permit. The revision is to change the
amount of impervious area being treated by the bio-retention cells. The original design
was for the runoff from building roofs to discharge onto splash blocks and travel overland
to the bio-retention cells for treatment. There are three areas on the buildings where
discharging onto splash blocks is not possible. These areas are now to be carried
to the storm system via roof drain leaders. These areas amount to 0.12 acres th
now be bypassing treatment. The approved and revised areas are as follows/
✓,y
— Existing Impervious area = 2.36 acres
i
— Bypass area as permitted = 1.94 acres �• 2
— Revised bypass area = 2.06 acres
As slated above the revised bypass area is still less than the existing impervious areh�
site. Please contact me or Donnie Stovall at 205-655-1991 if you have any questions.
Sincerely,
CIVIL CONSULTANTS OP AL, INC.
Patrick Rosenow, P.E.
Project Engineer
Da v " " oon, P.E.
N.C. PE # 36508
Principal
sc✓G!b/10 2—
Schnabel
E N G I N E E R I N G
December 1, 2010
Mr. Frank Tanahey, PE
B.L. Harbert International, LLC
820 Shades Creek Parkway, Suite 3000
Birmingham, AL 35209
Subject: Infiltration Testing and Test Pits
Warrior In Training (WIT) Barracks Complex
Fort Bragg, North Carolina
W9126G-08-D-0017, PN69798
(SE Ref. 09100038.00.05)
Dear Mr. Tanahey:
JAN 2 8 2011
DtAJQ
As requested by BL Harbert and Donnie Stovall with Civil Consultants, Inc., a Schnabel Engineering
South, PC (Schnabel) representative visited the project site to excavate test pits and conduct in -situ
double ring infiltrometer tests to aid in determining the seasonal high water table (SHWT) and infiltration
rate of the onsite soils at select locations for the Warrior In Training (WIT) Barracks Complex. At the time
of this work, the site was graded at or near the proposed finished soil subgrade and the storm water
boxes were in place in each bio retention basin.
Test pits were excavated in the areas noted on the attached plan. Test pits for the bio retention basins
were extended to approximately four (4) feet below the bottom of the basin (approximately eight (8) feet
below the existing finished soil subgrade). TP-8 was terminated at four (4) feet due to difficult digging.
The soil types encountered in the test pits were similar across the site and as noted in the test borings in
our geotechnical report dated April 9, 2010. The test pit data is included in the table below.
Test Pit Table
Test Pit
No.
Approximate Location
Depth below Finish
Soil Subgrade (fl)
Soil Type
Groundwater
Encountered
TP-1
Infilt. Trench 1 (east end)
6
Lean Clay (CL)
No
TP-2
Infilt. Trench 2
6
Lean Clay (CL)
No
TP-3
Infilt. Trench 1 (west end)
6
Clayey Sand (SC)
No
TP-4
Infilt. Trench 1 (west end)
6
Clayey Sand (SC)
No
TP-5
Bio-R1
8
Clayey Sand (SC)
No
TP-6
Bio-R3
8
Lean Clay (CL)
No
Schnabel-eng.com
T/803-796-6240 F/803-796-6250
104 Corporate Blvd., Suite 420 / West Columbia, SC / 29169
TP-7
Bio-R6
8
Lean Clay (CL)
No
TP-8
Infilt. Trench 2
4
Silty Sand (SM)
No
TP-9
Bio-R2
8
Silty Sand (SM)
No
TP-10
Bio-R5
8
Clayey Sand (SC)
No
TP-11
Bio-R4
8
Clayey Sand (SC)
No
TP-12
Bio-R7
8
Lean Clay (CL)
No
TP-13
Bio-R8
8
Clayey Sand (SC)
No
Based on our observations and the test pit data, we did not encounter any water in the test pits.
Therefore, the SHWT is below the depth of the test pit excavation, thus below the prescribed limits.
In -situ double ring infiltrometer testing was conducted at two locations as noted on the attached plan.
The location and elevation of each test was determined by Donnie Stovall of Civil Consultants. The
results of the infiltration tests are included below.
Infiltration Rate Summary Table
USDA
Elevation
Infiltration Rate
Test Location
Soil classification
Soil
(ft)
(in/hr)
Texture
Sandy
1 - Infiltration Trench #1
304.5
Clayey sand (SC)
0.67
Loam
Sandy
2- Infiltration Trench #2
295.0
Silly sand (SM)
2.25
Loam
Based on the infiltration test results, the infiltration rate at each location was above the required minimum
infiltration rate.
This letter has been prepared to aid in the site evaluation and to assist members of the project team. It
only addresses the specific areas observed. We have endeavored to prepare this letter in accordance
with generally accepted geotechnical engineering practice and make no warranties, either expressed or
implied, as to the professional advice provided.
We appreciate the opportunity to be of service for this project. Please do not hesitate to contact the
undersigned if clarification is needed for any aspect of this report.
Very truly yours,
SCHNABEL ENGINEERING SOUTH, PC
Stephen Hahn
Associate
Richard H. Wargo, PE
Principal
Project 09190038 / November 22, 2010 Page 2 Schnabel Engineering South, PC
SH:RW
Attachments
Test Pit and Infiltration test location plan
Distribution (via email):
Michael Grier— BL Harbert
Donnie Stovall — Civil Consultants
Project 09190038 / November 22, 2010 Page 3 Schnabel Engineering South, PC
I
WIT'Barracks'Complex
09190038.00 .
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December 2, 2010
JAN 2 8 2011
®W` Wad1
Mr. Robert Patterson
NC Department of Environmental and Natural Resources
DWQ — Wetlands Stormwater Branch
512 N. Salisbury St.
Raleigh, NS 27604
Re: Pt Bragg WIT Barracks — DWQ Submittal
Dear Mr. Patterson
DrH 0 3 2010
-;; 0 ', 2010
This letter is in response to the comments we received from you regarding the WIT
Barracks project dated November 12, 2010. Below is a summary of our revisions based
on the numbered comments we received from you.
1. The infiltration trench 1 detail has been moved to sheet DT-104, which is
included with this revision submittal.
2. Calculations on all BMPs have been checked for consistency and revised as
needed. Simple Method calculations have been added for the infiltration trenches.
3. Calculations on all BMPs have been checked for consistency and revised as
needed.
4. Calculations on all BMPs have been checked for consistency and revised as
needed.
5. Infiltration testing results within the BMP footprints have been provided.
6. SH WT testing results within the BMP footprints have been provided.
7. CS-103 has been revised to clarify areas not receiving treatment to 85% TSS and
to quantify the proposed amounts of impervious surface in these areas. A table
has been provided to clearly show the amounts of impervious surfaces existing
and proposed.
8. Drawdown calculations have been provided in the infiltration trench supplemental
calculations.
9. A vegetative filter strip is provided for infiltration trench 1. A vegetative filter
strip is not provided for infiltration trench 2. The volumes in excess of the
treatment volume for this trench are conveyed to the above ground detention pond
though the use of weirs in the infiltration trench inlet manholes. This stonnwater
will travel across the vegetated bottom of the pond before exiting the pond
through the outlet control structure. In the event that the pond starts staging and
storing water the additional detention period will aid in treating the overflow
volumes through settlement before leaving the pond. If the pond reaches a point
when the emergency overflow spillway is utilized the water will pass over the
vegetated spillway which will further treat the overflow. With these further
controls in place for the overflow volumes the filter strip requirement is met.
CCI�
We hope that we have addressed each of your comments appropriately. Please contact i 1 11
or Donnie Stovall at 205-655-1991 if you have any questions.
Sincerely,
Patrick Rosenow
Project Engineer
Civil Consultants of AL, Inc.
GA
NCDENR
North Carolina Department of Environment and Natural Resources
Beverly Eaves Perdue
Governor
Mr. Dormie Stovall
Civil Consultants of AL, Inc.
3528 Vann Road, Suite 105
Birmingham, AL 35235
Dear Mr. Stovall:
Division of Water Quality
Coleen H. Sullins Dee Freeman
Director Secretary
November 12, 2010
T
JAN 2 8 2011
DIM
Subject: Request for Additional Information
Stormwater Project No. SW6101102
Warrior in Transition Complex - Barracks
Cumberland County
The Division of Water Quality Central Office received a Stormwater Management Permit Application for
the subject project on November 5, 2010. A preliminary review of that information has determined that the
application is not complete. The following information is needed to continue the stormwater review:
il. Please provide 2 copies of sheet DT-100 for infiltration trench 1 as noted on DT-104. DT-100
was note submitted.
/ 2. The following need to be shown consistently on the supplement forms and calculations for
infiltration trenches 1 and 2: minimum treatment volume required (based on 1" using the
Simple Method) and volume provided.
3. The treatment volume calculations for infiltration trench 2 is based on DA = 10,890 sf.
However, the plans, application, and supplement show the DA = 38,332 sf. Based on the larger
DA, the minimum required treatment volume is more than double what is provided. Please
make the DA consistent though out, and increase the volume provided if the DA shown on the
plans is correct.
4. The treatment volume calculations for infiltration trench 5 is based on DA = 39,639 sf.
However, the plans, application, and supplement show the DA = 84,506 sf. The volume
provided is large enough using the larger DA shown on the plans. So, the volume provided
works, but please make the DA consistent though out.
✓ 5. Infiltration testing must be done within the footprint of each infiltration bmp. Boring B-301
may suffice for infiltration trenches 4 and 5, however they are not within the footprints.
Infiltration testing must be done for a minimum of trenches 1-3 within their footprint to ensure
that they will be able to function as designed. Minimal, if any, infiltration is stated from B-302
Wetlands and Stormwater Branch
1617 Mail Service Center, Ralegh, North Carolina 27699-1617 One
Location: 512 N. Salisbury St. Ralegh, North Carolina 27604 Nortth Carr i na
Phone: 91M07-63001 FAX: 919-807w64941 Customer Service: 1-877623-6748 �`I trrr`[ll�
Internet: .ncwaterquality.olg
An Equal Opportunity 1 Affirmative Action Employer
Mr. Donnie Stovall
SW6101 102 — Warrior in Transition Complex - Barracks
November 12. 2010
and B-303, which are near trenches 1 and 2. A minimum infiltration rate of 0.52 in/hr is
required for each trench.
/6. SFIWT elevations are provided on the supplements, but no supporting information is provided
in the soils report for how or where they are determined. SHWT elevations must be based on at
least one boring within the footprint of all BMPs (infiltration trenches and bioretention cells).
A. All impervious area must be treated to remove 85% TSS. The area labeled on CS- 103-RI as
0.58 ac. Area 2 to Pond 1 near the center of the site is not treated to 85%. This area appears to
drain directly to a dry pond that only receives 50% TSS credit. if this area is shown to have
equal less impervious area than the existing impervious area being removed, then it would be
allowable.
-'�8. Drawdown calculations for the infiltration trenches must be provided to show that the volume
draws down within 5 days.
,/9/. Vegetated filter strips (with level spreaders) are required for the overflow from infiltration
trenches. Options for waiving this requirement are provided in 16.3.9 of the BM Manual
Please note that this request for additional infannation is in response to a preliminary review. The
requested information should be received by this Office prior to December 13, 2010, or the
application will be returned as incomplete. The return of a project will necessitate resubmittal of all
required items, including the application fee.
If you need additional time to submit the information, please mail, fax, or email your request for a time
extension to the Division at the address and fax number at the bottom of this letter. The request must
indicate the date by which you expect to submit the required'information. The Division is allowed 90 days
from the receipt of a completed application to issue the permit.
It is our understanding that construction of the project has already begun. Please be aware that the
construction of any impervious surfaces, other than a construction entrance under an approved
Sedimentation Erosion Control Plan, is a violation of NCGS 143-215.1 and is subject to enforcement
action pursuant to NCGS 143-215.6A.
Please reference the State assigned project number SW6101102 on all correspondence. If you have any
questions concerning this matter please feel free to contact me at (919) 807-6375, or
robert.patterson a ncdenr.gov.
Sincerely,
Robert D. Patterson, PE
Environmental Engineer
Stormwater Permitting Unit
cc: Mr. Craig Lantz— Fort Bragg DPW-WMB
Fayetteville Regional Office — Mike Lawyer
SW6101102 File
Page 2 of 2
LCl/CIVIL CONSULTANTS & AL, INC.
)t:N Vann Itnnd, Sullc IOi, IIIrmloFham. AI, ic=i5
1'hnne: I:I/KI 6GG.IYYI IS\xa-'IBI M15S•N36h
December 8, 2010
Mr. Robert Patterson
NC Department of Environment and Natural Resources
DWQ - Wetlands and Stormwater Branch
512 N. Salisbury St.
Raleigh, NC 27604
Re: Ft Bragg WIT Barracks
Dear Mr. Patterson,
DE',"' _^
JAN Z 8 2011
Oio? 1030
M(@;14
This letter is to clarify differences between the approved plans and what will be issued to the
contractor in the field. Each revision to the plans that has been submitted to your office has been
updated with a new Sitework Bulletin number (SWB #X), and the changes clouded. The
contractor has seen these iterations in order to "keep him in the loop" but these plans have not
been issued to him for construction pending approval. The plans that have been ultimately
approved by NCDENR show SWB #6 being the latest revision, but because the contractor has
not been officially issued the intermediate revisions sent to your office, the next official revision
to the project will be SWB #5. Please know that the field set of plans labeled SWB 5 will be the
same plans as approved by your office (with the minor revisions attached with this letter). As we
discussed earlier, the pipe size of the pipe leaving the small detention pond increased to 24", but
did not get corrected on the plans. The detail for the outlet control weir for this pond was also
modified per the re -design of this area, and was not fully updated. The plans showing these
changes are attached to this letter, and comply with the calculations submitted and approved by
NCDENR.
Sincerely,
David Moon, P.E
Principal
cc: Michael Grier, BL Harbert
Attachment
Donnie Stovall, P.E.
Project Manager
October 27.2010
Mr. Robert Patterson
NC Department of Environment and Natural Resources
DWQ - Wetlands and Stormwater Branch
512 N. Salisbury St.
Raleigh, NC 27604
Re: Ft Bragg WIT Barracks —DWQ Submittal
Dear Mr. Patterson,
This letter is in response to the comments we recei e from you regarding the WIT
Barracks project dated September 30, 2010. Below is a summary of our revisions based
on the numbered comments we received from you.
. We have removed all proprietary devices from the plans. An Infiltration Trench #4 was
added to the plans to treat the storm water runoff from the basin that contributed to the
previously shown Isolator Row. This trench #4 has been sized adequately to treat runoff
from this basin. The 5 infiltration trenches were renumbered to maintain a consistent
pattern on site.
2. The basin map shown on CS-103 has been revised to show more clearly the drainage
areas for each BMP.
3. All BMPs on site have been labeled on sheets CS-100, CS-101 and CS-102.
4. With regard to storm water treatment, Site Work Bulletin #1 included adding
infiltration pipes in place of removed bioretention ponds. The current design has been
shown on the plans included in this submittal. All relevant design information and
application sheets are included and should suffice for this review.
5. A full geotechnical report has been included with this submittal.
6. A 2-sheet set of calculations for the five infiltration trenches has been included in the
supporting material of the storm report. This is an additional set of calculations that
include information used to determine treatment volumes and pipe sizes.
7. The P-index and sod type have been called out on detail sheet DT-101 for the
bioretention cells.
C�
8. There is one infiltration trench on site that has been shown on partial fill. The upper CCI
few feet of Infiltration Trench #1 is in fill but the lower portion of the trench is located
in existing soil.
9. A note has been added to sheet CS-100 indicating that no wetlands are located on site
10. No BUA credits will be taken for this project. The areas to be treated and bypass
areas have been noted on sheet CS-103 and the SWU Application. All existing pavement
(and other impervious areas) on site will be removed as part of this project.
We hope that we have addressed each of your comments appropriately. Please let me
know if there are any items that we have overlooked. You may contact me or Donnie
Stovall at 205-655-1991.
Sincerely,
Eric N. Smith, PE
Project Engineer
Civil Consultants of AL, Inc
cc: David Moon, CCI
Michael Grier, BL Harbert
NCDENR
North Carolina Department of Environment and Natural Resources
Beverly Eaves Perdue
Governor
Mr. Donnie Stovall
Civil Consultants of AL, Inc.
3528 Vann Road, Suite 105
Birmingham, AL 35235
Dear Mr. Stovall:
Division of Water Quality
Coleen H. Sullins
Director
November 12, 2010
NOV i 9 2U1U
10RI VGA
Subject: Request for Additional Information
Dee Freeman
Secretary
Stormwater Project No. SW6101102
Warrior in Transition Complex - Barracks
Cumberland County
The Division of Water Quality Central Office received a Stormwater Management Permit Application for
the subject project on November 5, 2010. A preliminary review of that information has determined that the
application is not.complete..The following information is needed to continue the stormwater review:
1. Please provide 2 copies of sheet DT-100 for infiltration trench 1 as noted on DT-104. DT-100
was note submitted.
2. The following need to be shown consistently on the supplement forms and calculations for
infiltration trenches 1 and 2: minimum treatment volume required (based on 1" using the
Simple Method) and volume provided.
3. The treatment volume calculations for infiltration trench 2 is based on DA = 10,890 sf.
However, the plans, application, and supplement show the DA = 38,332 sf. Based on the larger
DA, the minimum required treatment volume is more than double what is provided. Please
make the DA consistent though out, and increase the volume provided if the DA shown on the
plans is correct.
4. The treatment volume calculations for infiltration trench 5 is based on DA = 39,639 sf.
However, the plans, application, and supplement show the DA = 84,506 sf. The volume
provided is large enough using the larger DA shown on the plans. So, the volume provided
works, but please make the DA consistent though out.
5. Infiltration testing must be done within the footprint of each infiltration bmp. Boring B-301
may suffice for infiltration trenches 4 and 5, however they are not within the footprints.
Infiltration testing must be done for a minimum of trenches 1-3 within their footprint to ensure
that they will be able to function as designed. Minimal, if any, infiltration is stated from B-302
Wetlands and Stormwater Branch
1617 Mail Service Center, Raleigh, North Carolina 27699-1617 One
Location: 512 N. Salisbury St. Raleigh, North Carolina 27604 North Carol lna
Phone: 91M07-6300 t FAX: 919-807.64941 Customer Service: 1-877-623-6748 Naturally
w .mxatemuality.org
An Equal Opportunity 1 Atprmatwe Action Employer
Mr. Donnie Stovall
SW6101102 — Warrior in Transition Complex - Barracks
November 12, 2010
and B-303, which are near trenches 1 and 2. A minimum infiltration rate of 0.52 in/hr is
required for each trench.
6. SHWT elevations are provided on the supplements, but no supporting information is provided
in the soils report for how or where they are determined. SHWT elevations must be based on at
least one boring within the footprint of all BMPs (infiltration trenches and bioretention cells).
7. All impervious area must be treated to remove 85% TSS. The area labeled on CS-103-R1 as
0.58 ac. Area 2 to Pond 1 near the center of the site is not treated to 85%. This area appears to
drain directly to a dry pond that only receives 50% TSS credit. If this area is shown to have
equal less impervious area than the existing impervious area being removed, then it would be
allowable.
8. Drawdown calculations for the infiltration trenches must be provided to show that the volume
draws down within 5 days.
9. Vegetated filter strips (with level spreaders) are required for the overflow from infiltration
trenches. Options for waiving this requirement are provided in 16.3.9 of the BMP Manual.
Please note that this request for additional information is in response to a preliminary review. The
requested information should be received by this Office prior to December 13, 2010, or the
application will be returned as incomplete. The return of a project will necessitate resubmittal of all
required items, including the application fee.
If you need additional time to submit the information, please mail, fax, or email your request for a time
extension to the Division at the address and fax number at the bottom of this letter. The request must
indicate the date by which you expect to submit the required information. The Division is allowed 90 days
from the receipt of a completed application to issue the permit.
It is our understanding that construction of the project has already begun. Please be aware that the
construction of any impervious surfaces, other than a construction entrance under an approved
Sedimentation Erosion Control Plan, is a violation of NCGS 143-215.1 and is subject to enforcement
action pursuant to NCGS 143-215.6A.
Please reference the State assigned project number SW6101102 on all correspondence. If you have any
questions concerning this matter please feel free to contact me at (919) 807-6375, or
robert.patterson@ncdenr.gov.
Sincerely,
Robert D. Patterson, PE
Environmental Engineer
Stormwater Permitting Unit
cc: Mr. Craig Lantz— Fort Bragg DPW-WMB
Fayetteville Regional Office — Mike Lawyer
SW6101102 File
Page 2 of 2
Al2:��
w :'
NC®ENR
North Carolina Department of Environment and
Division of Water Quality
Beverly Eaves Perdue
Governor
Coleen H. Sullins
Director
December 8, 2010
Natural Resources
Dee Freeman
Secretary
Mr. Craig Lantz WDENR—FRO
Fort Bragg DPW - WMB �Ald 1 $ 2011
2175 Reilly Road Stop A
Fort Bragg, NC 28310-5000 ®VV�
Subject: Stormwater Permit No. SW6101102 VV
Warrior in Transition Complex - Barracks
High Density Bio-Retention & Infiltration Trench Project
Cumberland County
Dear Mr. Lantz:
The Stormwater Permitting Unit received a complete Stormwater Management Permit
Application for Warrior in Transition Complex - Barracks on November 5, 2010; with additional
information received December 3, 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.
SW6101102, dated December 8, 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 8, 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.
2.36 acres of existing impervious area will be removed from the site. This will allow for 1.94
acres of the new 7.46 acres total impervious area to not be treated.
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 Robert Patterson at (919)
807-6375; or robert.patterson@ncdenr.gov.
Wetlands and Stormwater Branch
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Location: 512 N. Salisbury St. Raleigh, North Carolina 27604
Phone: 919-807-63001 FAX: 919-807-64941 Customer Service: 1-877-623-6748
Internet: w .ncwaterquality.oig
An Equal Opportunity \ Affumative Action Employer
No thCarolina
Mr. Craig Lantz
SW6101102 — Warrior in Transition Complex - Barracks
December 8, 2010
Sincerely,
for oleen H. Sullins
cc: . Fayetteville Regional Office
SW6101102 File
ec: Mr. Donnie Stovall — Civil Consultants of AL, Inc.
Page 2 of 2
State Stormwater Permit
Permit No. SW6101102
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
Fort Bragg Directorate of Public Works
Warrior in Transition Complex - Barracks
NW corner of Normandy Dr. & Half St., Fort Bragg, Cumberland County
FOR THE
construction, operation and maintenance of eight bioretention cells and two
underground infiltration trenches 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 8, 2020, 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 1.8 and 1.9 of this permit. The stormwater control
has been designed to handle the runoff from 240,190 square feet of impervious
area. An additional 1.94 acres of impervious area will not be treated based on
existing impervious area credit.
3. In lieu of the overflow from the infiltration trenches going to vegetated filter strips,
the overflow for trench 1 will sheet flow through a vegetated slope into a dry
detention basin; and the overflow for trench 2 will go into another dry detention
basin.
4. The tract will be limited to the amount of built -upon area indicated in Section 1.8
and 1.9 of this permit, and per approved plans.
Page 1 of 9
State Stormwater Permit
Permit No. SW6101102
5. 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.
M
7
The runoff from all built -upon area within the permitted drainage area of this
project must be directed into the permitted stormwater control system.
The built -upon areas associated with this project shall be located at least 30 feet
landward of all perennial and intermittent streams.
The following design criteria have been provided in the infiltration trenches and
must be maintained at design condition:
Trench 1
a.
Drainage Area, 9cres:
1.72
Onsite, ft :
75,135
Offsite, ft2:
0
b:
Total Impervious Surfaces, ft2:
52,961
Onsite, ft :
52,961
Offsite, ft�:
0
C.
'Design Storm, inches:
1.0
d.
Trench Length ft:
310.0
e.
Trench Width, ft:
18.0
f.
. Trench Height, ft:
3.0
g. ;
Perforated Pipe Diameter / Length:
no pipe
h.
Bottom Elevation, FMSL:
305.5.
i.
Bypass Weir Elevation, FMSY
309.0
j..
Permitted Storage Volume, ft :
6,696
k.
Type of Soil:
Clayey Sand
I.
Expected Infiltration Rate, in/hr:
0.67
m..
Seasonal High Water Table, FMSL:
302.0
n.
Time to Draw Down, days:
3.73
o.
Receiving Stream: LIT to Beaver Crk
P.
Stream Index Number:
18-31-24-5
q.
Classification of Water Body:
"C"
r.
River Basin:
Cape Fear
Trench 2
5.84
254,390
0
134,869
134,869
0
1.0
185.0
14.0
6.5
60" / 379'
295.37
301.87
11,363
Silty Sand
2.25
293.0
1.89
LIT to Tank Crk
18-23-27
,.C.,
Cape Fear
Page 2 of 9
State Stormwater Permit
Permit No. SW6101102
Q
The following design criteria have been provided in the bioretention cells and
must be maintained at design condition:
a. Drainage Area, acres:
Onsite, ft :
Offsite, ft2:
b. Total Impervious Surfaces, ft2:
Onsite, ft
Offsite, ft2:
c. Design Storm, inches:
d. Ponding Depth, inches:
e. SHWT, fmsl:
f. Planting Media Depth, feet:
g. Cell Dimensions, feet:
h. Planting Elevation, fmsl-
i. Bottom Surface Area, ft2:
j. Permitted Storage Volume, ft3:
k. Bypass / Storage Elevation, fmsl:
I. Drawdown Time, hours:
M. Underdrain Diameter, inches:
n. Total number of plants provided:
o. Receiving Stream/River Basin:
p. Stream Index Number:
.q. Classification of Water Body:
(9 continues on page 4)
Cell 1 Cell 2
0.27
0.14
11,761
5,969
0
0
4,020
2,472
4,020
2,472
0
0
1.0
1.0
12
12
300.0
300.0
2.0
2.0
60x21
57x27
313.5
316.5
1,260
1,539
1,260
1,539
314.5
317.5
36
36
6.0
6.0
grass sod
grass sod
UT to Beaver Crk / Cape Fear
18-31-24-5
"C„
Page 3 of 9
State Stormwater Permit
Permit No. SW6101102
9 continued:
a.
Drainage Area, acres:
Onsite, ft :
Offsite, ft2:
b.
Total Impervious Surfaces, ft2:
Onsite, ft
Offsite, ft2:
C.
Design Storm, inches:
d.
Ponding Depth, inches:
e.
SHWT, fmsl:
f.
Planting Media Depth, feet:
g.
Cell Dimensions, feet:
h.
Planting Elevation, fmsl,
i.
Bottom Surface Area, ft2:
j.
Permitted Storage Volume, ft3:
k.
Bypass / Storage Elevation, fmsl
I.
Drawdown Time, hours:
M.
Underdrain Diameter, inches:
n.
Total number of plants provided:
o.
Receiving Stream/River Basin:
P.
Stream Index Number:
q.
Classification of Water Body:
Cell 3
0.29
12,632
0
6,200
6,200
0
1.0
12
307.5
2.0
60x22
316.5
1,320
1,320
317.5
36
6.0
Cell 4
0.37
16,268
0
6,260
6,260
0
1.0
12
307.5
2.0
90x22
316.5
1,980
1,980
317.5
36
6.0
Cell 5
0.41
17,995
0
7,877
7,877
0
1.0
12
307.5
2.0
105x28
315.5
2,940
2,940
316.5
36
6.0
grass sod grass sod grass sod
UT to Beaver Crk / Cape Fear
18-31-24-5
„C„
Cell 6
0.34
14,810
0
7,900
7,900
0
1.0
12
307.5
2.0
71x10
317.5
710
710
318.5
36
6.0
grass sod
Cell 7
0.32
13,939
0
7,810
7,810
0
1.0
12
307.5
2.0
64x16
316.5
1,024
1,024
317.5
36
6.0
grass sod
Cell 8
0.36
15,682
0
9,821
9,821
0
1.0
12
307.5
2.0
64x16
316.5
1,024
1,024
317.5
36
6.0
grass sod
Page 4 of 9
State Stormwater Permit
Permit No. SW6101102
Il. SCHEDULE OF COMPLIANCE
1. 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.
2. During construction, erosion shall be kept to a minimum and any eroded areas of
the system will be repaired immediately.
3. 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 bypass structure, filter media, flow
spreader, catch basins, piping and vegetated filter.
g. A clear access path to the bypass structure must be available at all times.
4. Records of maintenance activities must be kept for each permitted BMP. The
records will indicate the date, activity, name of person performing the work and
what actions were taken.
The permittee shall submit to the Division of Water Quality 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.
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.
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 via appropriate
easements at all times.
Page 5 of 9
State Stormwater Permit
Permit No. SW6101102
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.
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.
10. The permittee shall submit final site layout and grading plans for any permitted
future areas shown on the approved plans, prior to construction.
11. 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.
12. 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
1. This permit is not transferable to any person or entity 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 completed Name/Ownership Change form
to the Division of Water Quality, signed by both parties, and accompanied by the
supporting documentation as listed on page 2 of the form. The approval of this
request will be considered on its merits and may or may not be approved.
2. The permittee is responsible for compliance with all permit conditions until such
time as the Division approves the transfer request.
3. 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.
4. 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.
5. 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.
6. 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.
Page 6 of 9
State Stormwater Permit
Permit No. SW6101102
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 reissuance or
termination does not stay any permit condition.
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.
Approved plans and specifications for this project are incorporated by reference
and are enforceable parts of the permit.
10. 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.
11. The permittee shall notify the Division in writing of any name, ownership or
mailing address changes at least 30 days.
12. 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 8t' day of December, 2010.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
1<2L e/
for Goleen H. Sullins, Director
Division of Water Quality
By Authority of the Environmental Management Commission
Page 7 of 9
State Stormwater Permit
Permit No. SW6101102
Warrior in Transition Complex - Barracks
Stormwater Permit No. SW6101102
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,
(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 8 of 9
State Stormwater Permit
Permit No. SW6101102
Certification Requirements:
1
2
3
m
5.
6.
7.
8.
The drainage area to the system contains approximately the permitted
acreage.
The drainage area to the system contains no more than the permitted
amount of built -upon area.
All the built -upon area associated with the project is graded such that the
runoff drains to the system.
All roof drains are located such that the runoff is directed into the system.
The bypass structure elevations are per the approved plan.
The bypass structure is located per the approved plans.
A Trash Rack is provided on the outlet/bypass structure.
All slopes are grassed with permanent vegetation.
y. Vegetated slopes are no steeper than 3:1.
0. 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. All required design depths are provided.
13. All required parts of the system are provided.
14. The required system dimensions are provided per the approved plans.
Submit this Designer's Certification to:
DWQ Fayetteville Regional Office
Surface Water Protection
225 Green Street
Systel Bldg. Suite 714
Fayetteville, NC 28301-5043
Page 9 of 9