HomeMy WebLinkAboutSW7070221_CURRENT PERMIT_20071113STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW-V Z= I
DOC TYPE
EY CURRENT PERMIT
APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
IlZ-/5
YYYYMMDD
Wa::Ko
TF,9 Michael F. Easley, Governor
OG William G. Ross Jr., Secretary
QNorth Carolina Departrnent of Environment and Nature] Resources
.� Coleen H. Sullins, Director
Division of Water Quality
DIVISION OF WATER QUALITY
November 13, 2007
NN&W
Attn: Mr. Patrick Whitehurst
199 Mill Street
Elizabeth City, NC 27909
Subject:
Dear Mr. Whitehurst:
Stormwater Permit No. SW7070221
Nixons Terrace
High Density Stormwater Project
Perquimans County
The Washington Regional Office received revised plans and
supporting information for the subject project on August 16, 2007,
2007. It has been determined that this project will comply with
the Stormwater Regulations set forth in Title 15A NCAC 2H.1000.
We are forwarding Permit SW7070221 dated November 13, 2007 to NN&W
for the construction and operation of a constructed wetland system
to serve Nixons Terrace located off NC37 at Winfall, NC.
This permit shall be effective from the date of issuance
until November 13, 2017, 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.
North Carolina Division of Water Quality Intemet: h2o.enr.state.nc.us
943 Washington Square Mail Phone: 252-946-6481
Washington, NC 27889 FAX 252-946-9215
An Equal Opportunity/Affirmative Acton Employer— 50% RecycledA 0% Post Consumer Paper
NorthCarohna
Natura!!t,
NN&W
November 13, 2007
Page Two
If you have any questions, or need additional information
concerning this matter, please contact Bill Moore at (252) 948-
3919.
S'nceLely,Rel Tonal
g Supervisor
Surface Water Protection Section
Washington Regional Office
cc: Resource International, LTD
Perquimans County Planning/Inspections
Washington Regional Office
Central Files
State Stormwater Management Systems
Permit No. SW7070221
STATE OF NORTH CAROLINA
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
NN&W
Perquimans County
FOR THE
construction, operation and maintenance of stormwater management
systems in compliance with the provisions of 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 for
grass swales, vegetated buffers and a constructed wetland system
to serve Nixons Terrace located at Winfall, NC.
This permit shall be effective from the date of issuance until
November 13, 2017, 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 on page 4 of this permit,
the Project Data Sheet.
3. Approved plans and specifications for this project are
incorporated by reference and are enforceable parts of the
permit.
3
DIVISION OF WATER QUALITY
PROJECT DATA
Project Name: Nixons Terrace
Permit Number: SW7070221
Location: Perquimans County
Applicant: NN&W
Mailing Address: 199 Mill Street
Elizabeth City, NC 27909
Application Date: 02/20/2007; original
08/16/2007; complete
Receiving Stream: UT-Perquimans River
Stream Classification: SC
Total Site Area: 12.9 acres
Total Impervious: 2.77 acres
Area Allowed
Wetland Depth: 1.0 ft
Required Storage Volume: 11,231cf
Provided Storage Volume: 11,308 cf
Required Surface Area: 11,231 sf
Provided Surface Area: 12,285 sf
Controlling Orifice: drawndown orifice 2.0-inch at
elevation 4.5 ft.
0
4. No homeowner/lot owner/developer shall be allowed to fill in,
alter, or pipe any vegetative practices (such as swales)
shown on the approved plans as part of the stormwater
management system without submitting a revision to the permit
and receiving approval from the Division.
5. The following items will require a modification to the
permit:
a. Any revision to the approved plans, regardless of size
b. Project name change
C. Transfer of ownership
d. Redesign or addition to the approved amount of built -
upon area
e. Further subdivision of the project area.
In addition, the Director may determine that other revisions
to the project should require a modification to the permit.
6. 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.
II. SCHEDULE OF COMPLIANCE
1. The permittee will comply with the following schedule for
construction and maintenance of the stormwater management
system.
a. 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 surfaces except roads.
b. During construction, erosion shall be kept to a minimum
and any eroded areas of the system will be repaired
immediately.
2. The facilities must be properly maintained and operated at
all times. The approved Operation and Maintenance Plan must
be followed in its entirety and maintenance must occur at the
scheduled intervals.
3. The permittee shall at all times provide the operation and
maintenance necessary to assure the permitted stormwater
system functions at optimum efficiency including, but not
limited to:
5
a. Semiannual scheduled inspections (every 6 months)
b. Sediment removal
C. Mowing and revegetation of side slopes
d. Immediate repair of eroded areas
e. Maintenance of side slopes in accordance with approved
plans and specifications
f. Debris removal and unclogging of outlet structure,
orifice device and catch basins and piping.
4. 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.
5. 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.
6. Upon completion of construction 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. Mail the
Certification to the Washington Regional Office, 943
Washington Square Mall, Washington, North Carolina, 27889,
attention Division of Water Quality.
7. A copy of the approved plans and specifications shall be
maintained on file by the Permittee for a minimum of five
years from the date of the completion of construction.
III. GENERAL CONDITIONS
1. This permit is not transferable. In the event there is a
desire for the facilities to change ownership, or there is a
name change of the Permittee, a formal permit request must be
submitted to the Division of Water Quality accompanied by an
application fee, 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.
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 143-215.6(a) to 143-215.6(c).
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) which have jurisdiction.
6
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 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.
6. At least six months prior to the expiration date, the
permittee must submit a written request for permit renewal
to the Division of Water Quality, Washington Regional
Office.
Permit issued this the 13 th day of November, 2007.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
L-
r'Coleen H. Mullins, Director
Division of Water Quality
By Authority of the Environmental Management Commission
Permit Number SW7070221
7
Stormwater Permit No. SW7070221
Nixons Terrace
Swales, Vegetated Buffers, and Constructed Wetland System
Perquimans County
Designer's Certification
as a duly
registered Professional Engineer in the State of North Carolina,
having been authorized to observe (periodically/weekly/full time)
the construction of the project,
for
(Project)
(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.
Signature
Registration Number
Date
I
U''
a1SLimV� �tLw OFFICE USE ONLY
Date RecueivedL
Fee Paid
IPermit Number
IF FFR 9 n m
i ++ark
®11pp,,((�� 11gg,,ryry DD State of North Carolina
gtl�C tl�nRDepartment of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This form may he photocopied for use as an original G o
I. GENERAL INFORMATION $(7/
1. Applicants name (specify the name of the corporation, individual, etc. who owns the project):
W t4 W
2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
3. Mailing Address for person listed in item 2 above:
1g' M I�t. Sri-as-r
City: ELI}AgeTo Cif" State: Zip:
Telephone Number: (252 ) 338 — S2 11
4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
NM-10,�S TOV-4ZAe,9
5. Location of Project (street address):
N C-
City: \n/I'+FPu. County: PPa0yIMAtf'S
6. Directions to project (from nearest major intersection):
APP0vx4A4*T9ly 180o FT Sovr+{ OtJ We, W6%i4w'k-1 3�-
FPor'l 'ENE Irire"ELTIo�j OF MAi'J STvx-T hz"o NG Ntc w4-t
7. Latitude: • ?'1 Longitude: T`• 45 W of project
S. Contact person who can answer questions about the project:
Name: M EL }{oPy+JS- .; pl; • Telephone Number:
II. PERMIT INFORMATION:
1. Specify whether project is (check one): X New Renewal Modification
Form SWU-101 Version 3.99 Page I of 4
2. If this application is being submitted as th� result of a renewal or modification to an existing permit, list the
existing permit number N A and its issue date (if known)
3. Specify the type of project (check one):
Low Density i High Density Redevelop General Permit Other
4. Additional Project Requirements (check applicable blanks):
_CAMA Major X Sedimentation/Erosion Control 404/401 Permit NPDES Stormwater
Information on required state permits can be obtained by contacting the Customer Service Center at
1-877-623-6748.
III. PROJECT INFORMATION
I. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative
(one to two pages) describing stormwater management for the project.
THE RuwoFP Vy6wPev AeEA Wtu ?6 6oNVG'(s9 To A
1,7tC s 0-> FPV-ii-IT`1 AT TkE Imo¢ of THE THE VSTF-Mao Fg<-R-" IS DES
Wlru A Loo FLow 04lFK.6 .THS D0A'-3D0wrJ Time, f6� l-tru•t --rower[ IS
2. Stormwater runoff from this project drains to the PBRR u1T 1 ANDS River basin.
3. Total Project Area: 12 _ `1 acres 4. Project Built Upon Area: 21.S %
5. How many drainage areas does the project
6. Complete the following information for each drainage area. If there are more than two drainage areas in the
project, attach an additional sheet with the information for each area provided in the same format as below.
Basin Information
Drainage Area I
Drainage Area 2
Receiving Stream Name
U A 'S I V 612
Receiving Stream Class
Drainage Area
5& o (,31 FT'
/Z • 87
Existing Impervious' Area
0
Proposed Impervious*Area
F*'
% Impervious* Area (total)
Impervious* Surface Area
Drainage Area I
Drainage Area 2
On -site Buildings
CJI �p 2
On -site Streets
f:7Tl
On -site Parking
2 p 660 L
On -site Sidewalks
�-
Other on -site
Off -site
—
Total: 1 Lp� 3 (o
Total:
Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas,
sidewalks, gravel areas, etc.
Form SWU-101 Version 3.99 Page 2 of
7. How was the off -site impervious area listed above derived? N N
IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
The following italicized deed restrictions and protective covenants are required to be recorded for all
subdivisions, outparcels and future development prior to the sale of any lot. If lot sizes vary significantly, a table
listing each lot number, size and the allowable built -upon area for each lot must be provided as an attachment.
1. The following covenants are intended to ensure ongoing compliance with state storrrtwater management permit number
as issued by the Division of Water Quality. These covenants may not be
changed or deleted without the consent of the State.
2. No more than square feet of any lot shall be covered by structures or impervious materials.
Impervious materials include asphalt, gravel, concrete, brick, stone, slate or similar material but do not include wood
decking or the water surface of swimming pools.
3. Swales shall not be filled in, piped, or altered except as necessary to provide driveway crossings.
4. Built -upon area in excess of the permitted amount requires a state stormwater management permit modification prior to
construction.
5. All permitted runoff from outparcels or future development shall be directed into the permitted stormwater control
system. These connections to the stormwater control system shall be performed in a manner that maintains the integrity
and performance of the system as permitted.
By your signature below, you certify that the recorded deed restrictions and protective covenants for this project
shall include all the applicable items required above, that the covenants will be binding on all parties and persons
claiming under them, that they will run with the land, that the required covenants cannot be changed or deleted
-- - without concurrence from the State, and that they will be recorded prior to the sale of any lot. - --
V. SUPPLEMENT FORMS
The applicable state stormwater management permit supplement form(s) listed below must be submitted for each
BMP specified for this project. Contact the Stormwater and General Permits Unit at (919) 733-5083 for the status
and availability of these forms.
Form SWU-102
Wet Detention Basin Supplement
Form SWU-103
Infiltration Basin Supplement
Form SWU-104
Low Density Supplement
Form SWU-105
Curb Outlet System Supplement
Form SWU-106
Off -Site System Supplement
Form SWU-107
Underground Infiltration Trench Supplement
Form SWU-108
Neuse River Basin Supplement
Form SWU-109
Innovative Best Management Practice Supplement
Form SWU-101 Version 3.99 Page 3 of 4
VI. SUBMITTAL REQUIREMENTS
Only complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ).
A complete package includes all of the items listed below. The complete application package should be
submitted to the appropriate DWQ Regional Office.
1. Please indicate that you have provided the following required information by initialing in the space provided
next to each item.
Initials
• Original and one copy of the Stormwater Management Permit Application Form
• One copy of the applicable Supplement Form(s) for each BMP `
• Permit application processing fee of $420 (payable to NCDENR)
• Detailed narrative description of Stormwater treatment/management
• Two copies of plans and specifications, including:
- Development/Project name
- Engineer and firm
-Legend
- North arrow
- Scale
- Revision number & date
- Mean high water line
- Dimensioned property/project boundary
- Location map with named streets or NCSR numbers
- Original contours, proposed contours, spot elevations, finished floor elevations
- Details of roads, drainage features, collection systems, and stormwater control measures
- Wetlands delineated, or a note on plans that none exist
- Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations
- Drainage areas delineated
- Vegetated buffers (where required)
VII. AGENT AUTHORIZATION
If you wish to designate authority to another individual or firm so that they may provide information on your
behalf, please complete this section. Designated agent (individual or firm): NIELv1J E • NoPk-1a5- JT
YZ l P. E
Mailing Address: i'5( TfiiMe-L-r-- SpAoPLs Suite �.1
City: N6wyowT NEWS State:yA Zip: 23�oto
Phone: ( '}S4' ) — \ . Fax: ( �4S} ) fi'13 — -'4 �2
VIII. APPLICANT'S CERTIFICATION
I, (print or type name_of person listed in General Information, item 2) 91? •ck G 11, �r1 ur Sf
certify that the information included on this permit application form is, to the best of my knowledge, correct and
that the project will be constructed in conformance with the approved plans, that the required deed restrictions
and protective covenants will be recorded, and that the proposed project complies with the requirements of 15A
NCAC 2H .1000.
Signature: �s% Date: 07
Form SWU-101 Version 3.99 Page 4 of
DWOProjectNo. sW _+0}02Z1 AUG 1 0 2007
DMSION OF WATER QUALITY - 401 EXTENDED DETENTION (and POCKET*) WETLAND WORKSHEET
I. PROJECT INFORMATION (please complete the following information):
Project Name : i� 1 !S-fEEQ�AGE
Contact Person: E1¢EE► MIL51 AO Phone Numbef:
For projects with multiple basins, specify which basin this worksheet applies to: N7 A
Permanent Pool Elevation
Temporary Pool Elevation
Permanent Pool Surface Area
Drainage Area
Impervious Area
Forebay Surface Area
Marsh 0"-9" Surface Area
Marsh 9"-18' Surface Area
Micro Pool Surface Area
Temporary Pool Volume
SA/DA used
Diameter of Odfice
REQUIRED ITEMS CHECKLIST
4.5 ft.
5.28 ft.
$ sq. ft
•l v
ac.
3�
ac.
1183
sq. ft.
SA
sq. ft.
o I-
sq. ft.
to
sq. ft.
cu. ft.
(elevation of the orifice invert out)
(elevation of the outlet structure invert in)
(water surface area at permanent pool elevation)
(on -site and off -site drainage to the basin)
(on -site and off -site drainage to the basin)
(at permanent pool elevation approximately 15%)'
(at permanent pool elevation approximately 35%)'
(al permanent pool elevation approximately 35%)'
(at permanent pool elevation approximately 15%)'
(volume detained on top of the permanent pool)
A 'i.kP�'c MA43-^A)surface area to drainage area ratio)'
2 in. (draw down orifice diameter)
Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. ffa
2gm1?eme17/h8s not been met, a((ach an exolanafion ofwhy At a minimum, a complete stormwater management plan submittal indudes
a worksheet for each BMP, design calculations, plans and specifications showing all BMPs and outlet structure details, a detailed
drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal package will result in a request for
additional information and will substantially delay final review and approval of the project
Aoolicants Initials
CoA4 The temporary pool controls runoff from the 1 inch rain.
!� ^^ The basin side slopes are no steeper than 3:1.
M A planting plan for the marsh areas with plant species and densities is provided.
6 M Vegetation above the permanent pool elevation is specified.
&AI An emergency drain is provided to drain the basin.
&A4 The temporary pool draws down in 2 to 5 days.
GM Sediment storage is provided in the permanent pool.
FoM A sediment disposal area is provided.
(oM Access is provided for maintenance. .
(aM A site specific, signed and notarized operation and maintenance agreement is provided.
CoM The drainage area (including any offsite area) is delineated on a site plan.
(D Nl Access is provided for maintenance.
"� Plan details for the wetland are provided.
Plan details for the inlet and outlet are provided.
G M A site specific operation and maintenance agreement, signed and notarized by the responsible party is provided (see
http:/fh 2o. eh nr.state. nc. ustncweflands/oandm.doc).
Pocket Wetlands have different design parameters and are only assumed to remove 35%TSS — See pp. 19 and 20 of the NC DENR
StormwaterBMP Manual, April 1999. 10%open water, 50%high marsh, 40%low marsh.
WETLAND DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
The wetland detention basin system is defined as the wetland detention basin, pretreatment
including forebays and the vegetated filter if one is provided. , .
Maintenance activities shall be performed as follows: AUG 1 2007
1. After every significant runoff producing rainfall event and at least monthly:
a. Inspect the wetland detention basin system for sediment accumulation, erosion, trash
accumulation, vegetated cover, and general condition.
b. Check and clear the orifice of any obstructions such that drawdown of the temporary
pool occurs within 2 to 5 days as designed.
2. Repair eroded areas immediately, re -seed as necessary to maintain good vegetative cover,
mow vegetative cover to maintain a maximum height of six inches, and remove trash as
needed.
Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.)
quarterly to maintain proper functioning.
4. Remove accumulated sediment from the wetland detention basin system semi-annually or
when depth is reduced to 75% of the original design depth (see diagram below). Removed
sediment shall be disposed of in an appropriate manner and shall be handled in a manner
that will not adversely impact water quality (i.e. stockpiling near a wetland detention basin
or stream, etc.).
The measuring device used to determine the sediment elevation shall be such that it will
give an accurate depth reading and not readily penetrate into accumulated sediments.
If the elevation of the marsh areas exceed the permanent pool elevation, the sediment
should be removed to design levels. This shall be performed by removing the upper 6
inches of soil and stockpiling it. Then the marsh area shall be excavated six inches below
design elevations. Afterwards the stockpiled soil should be spread over the marsh surface.
The soil should not be stockpiled for more than two weeks.
When the permanent pool depth reads 0.92 feet in the forebay and micro -pool, the
sediment shall be removed.
BASIN DIAGRAM
p 1 Permanent Pool Elevation 4_5
Sediment emoval El. 3.58 I 75% Sediment Removal Elevation 4.01 75%
----------------------------------------------- ---
Elevation 1.0 25% Bottom Elevation 3_5 25% I /
FOREBAY MAIN POND
,AUG 1.4,2007 06:41A 2522642712 page 3
nu 5. 1, te,,r i.LIIM I u. in t e i Rd 10 Rd 1, uu• No. ISllh r. 'i.-'j
S. Remove cattails and other Wigenous wetland plants when they cover 60% of the basin
surface. These plants shall be encouraged to grow along the vegetated ah9m and forebay
berm.
Wetland planting densities in the marsh areas should be maintained by replanting bare
areas as needed Wetland plants should be encouraged to grow in the marsh areas
B. If the basin must be drained for an emergency or to perform maintenance, the flushing of
sediment through the emergency drain shall be mthimtsed to the maximum extent prdctic
7. All components of the wetland detention basin system shall be maintained in good working
order.
B. Level spreaders or other structures that provide diffuse Clow shall be maintained every six
months. All accumulated sediment and debris shall be removed from the structure, and a
level elevation shall be maintained across the entire flow spreading structure. Any down
gradient erosion must be repaired and/or replanted as necessary.
I acknowledge and egg by my signature below that I am responsible for the performance of
the seven maintenance procedures listed above. I agree to nodly, DWO of any problems with
the system or prior to any changes to the system or responsible party.
Print
Note: The legally responsible party should not be a homeowners essocfation unless more it
60% of the lots have been sold and a resident of the subdivision has been named the
president.
1, S. � , a Notary Public for the State of
N0,41I. Cs+.o )7,, County of E ";mans do hereby certify that
_ _-172c%n L { 1-1- ,rsl -J—i personally appeared before me this /11 day
A l,4g., <+- 0 7 and acknowledge the due execution of the forgoing wetland
detention basin maintenance requirements. Witness my hand and official seal,
...........
QQ NOTAgY.GyN
O • PUgLIG _
Q=AI
My commission expires /%lam /(� Aoog
AUC 07,2007 12;12A 757 873 7712