SW7101005_Final Permit_20110427

�a�'�
ICDEE RD
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins Dee Freeman
Governor Director Secretary
April 27, 2011
Mr. Willie M. Carawan, County Administrator
Tyrrell County
P.O. Box 449
Columbia, NC 27925
Subject: Stormwater Permit No. SW7101005
Howett Business Park
Low Density Subdivision with a Curb Outlet Swale System
Tyrrell County
Dear Mr. Carawan:
The Washington Regional Office received a complete Stormwater Management Permit Application for
Howett Business Park on March 21, 2011. Staff review of the plans and specifications has
determined that the project, as proposed, will comply with the Stormwater Regulations set forth in
Session Law 2008-211 and Title 15A NCAC 2H.1000. We are forwarding Permit No. SW7101005,
dated April 27, 2011, for the construction of the subject project.
This permit shall be effective from the date of issuance until rescinded and shall be subject to the
conditions and limitations as specified therein, and does not supercede any other agency permit that
may be required.
If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right
to request an adtudlcatory hearing upon written request within thirty (30) days following receipt of this
permit. This request must be in the form of a written petition, conforming to Chapter 150B of the North
Carolina General Statutes, and filed with the Office of Administrative Hearings, P.O. Drawer 27447,
Raleigh, NC 27611-7447. Unless such demands are made this permit shall be final and binding.
If you have any questions, or need additional information concerning this matter, please contact me at
[phone].
i cere ,
AI g
Regional Supervisor
Surface Water Protection Section
cc: Hobbs, Upchurch & Associates - Wilmington
Tyrrell County Inspections
North Carolina Division of Water Quality Intemet: www.ncwaterqualitv.ore
943 Washington Square Mall Phone: [phone]�7One N
Washington, NC 27889 FAX [phone] aO��Wh'Carrohna
An Equal Opportunity/Affirmative Acton Employer- 50%Recycled110°% Post Consumer Paper Y , ah(rally

STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
STORMWATER MANAGEMENT PERMIT
LOW DENSITY SUBDIVISION DEVELOPMENT
WITH A CURB OUTLET SWALE SYSTEM
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
Tyrrell County
Howett Business Park
FOR THE
construction, operation and maintenance of a 24% low density subdivision with a curb outlet swale
system in compliance with the provisions of Session Law 2008-211 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.
The Permit shall be effective from the date of issuance until rescinded and shall be subject to the
following specific conditions and limitations:
I. DESIGN STANDARDS
Each of the lots is limited to that maximum amount of built -upon area as indicated in Section
11,7.f. of this permit, as indicated in the application and as shown on the approved plans.
2. The overall tract built -upon area percentage for the project must be maintained at 24%, per the
requirements of Session Law 2008-211 and Section .1 �05 of the stormwater rules.
3. The built -upon areas associated with this project shall be located at least 50 feet landward of
all perennial and intermittent surface waters.
4. Runoff conveyances other than the curb outlet system swales, such as perimeter ditches, must
be vegetated with side slopes no steeper than 3:1 (H:V).
5. All roof drains must terminate at least 50 feet from the mean high water mark of surface
waters.
6. Level spreaders shall be provided at the end of all swales that discharge into a regulated
wetland or any surface water.

This project proposes a curb outlet system. Each designated curb outlet swale or 100'
vegetated area shown on the approved plan must be maintained at a minimum of 100' long,
maintain 5:1 (H:V) side slopes or flatter, have a longitudinal slope no steeper than 5%, carry
the flow from a 10 year storm in a non -erosive manner, maintain a dense vegetated cover, and
be located in either a dedicated common area or a recorded drainage easement.
II. SCHEDULE OF COMPLIANCE
2.
3.
0
5.
Curb outlet swales, vegetated areas and other vegetated conveyances shall be constructed in
their entirety, vegetated, and be operational for their intended use prior to the construction of
any built -upon surface, per the approved plans
During construction, erosion shall be kept to a minimum and any eroded areas of the swales or
other vegetated conveyances will be repaired immediately.
The permittee shall at all times provide the operation and maintenance necessary to operate
the permitted stormwater management. systems at optimum efficiency to include:
a. Inspections
b. Sediment removal.
C. Mowing, and re -vegetating of the side slopes.
d. Immediate repair of eroded areas.
e. Maintenance of side slopes in accordance with approved plans and specifications.
f. Cleaning and repair of catch basin grates, flumes, piping, and the flow spreader
mechanism.
g. Maintenance of level spreaders and infiltration areas, in accordance with approved
plans.
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 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 or to the drainage area.
e. Further subdivision, acquisition or sale of the project area. The project area is defined
as all property owned by the permittee, for which Sedimentation and Erosion Control
Plan approval was sought.
f. Filling in, piping, or altering any vegetative conveyance shown on the approved plan.
The permittee shall submit all information requested by the Director or his representative within
the time frame specified in the written information request.
Deed restrictions are incorporated into this permit by reference and must be recorded with the
Office of the Register of Deeds prior to the sale of any lot.

i-1
a
Recorded deed restrictions must include, at a minimum, the following statements related to
stormwater management:
a. The following covenants are intended to ensure ongoing compliance with State
Stormwater Management Permit Number SW7101005, as issued by the Division of
Water Quality under NCAC 2H.1000.
b. The State of North Carolina is made a beneficiary of these covenants to the extent
necessary to maintain compliance with the Stormwater Management Permit.
C. These covenants are to run with the land and be binding on all persons and parties
claiming under them.
d. The covenants pertaining to stormwater may not be altered or rescinded without the
express written consent of the State of North Carolina, Division of Water Quality.
e. Alteration of the drainage as shown on the approved plans may not take place without
the concurrence of the Division of Water Quality.
f. The maximum built -upon area per lot is as listed below
Lot # Maximum Built Upon Area
1 64,777.90 ft2
2 68,184.80 ft2
3 35,000.00 ft2
4 68,548.22 ft2
Tyrrell Hall Lot 77,939.07 ft2
This allotted amount includes any built -upon area constructed within the lot property
boundaries, and that portion of the right-of-way between the front lot line and the edge
of the pavement. Built upon area includes, but is not limited to, structures, asphalt,
concrete, gravel, brick, stone, slate, coquina, driveways, and parking areas, but does
not include raised, open wood decking, or the water surface of swimming pools.
g. Filling in, piping or altering any 3:1 vegetated conveyances (ditches, swales, etc.)
associated with the development except for average driveway crossings, is prohibited
by any persons.
h. Filling in, piping or altering any designated 5:1 curb outlet swale or vegetated area
associated with the development is prohibited by any persons.
k. A 50' vegetated buffer must be maintained between all built -upon area and the Mean
High Water line of surface waters.
I. All roof drains shall terminate at least 50' from the Mean High Water mark.
M. Each designated curb outlet swale or 100' vegetated area shown on the approved plan
must be maintained at a minimum of 100' long, maintain 5:1 (H:V) side slopes or flatter,
have a longitudinal slope no steeper than 5%, carry the flow from a 10 year storm in a
non -erosive manner, maintain a dense vegetated cover, and be located in either a
dedicated common area or a recorded drainage easement.
The permittee must submit a copy of the recorded deed restrictions within 30 days of the date
of recording.
No piping shall be allowed except those minimum amounts necessary to direct runoff beneath
an impervious surface such as a road or under driveways to provide access to lots.

7. This project proposes a curb outlet system. Each designated curb outlet swale or 100'
vegetated area shown on the approved plan must be maintained at a minimum of 100' long,
maintain 5:1 (H:V) side slopes or flatter, have a longitudinal slope no steeper than 5%, carry
the flow from a 10 year storm in a non -erosive manner, maintain a dense vegetated cover, and
be located in either a dedicated common area or a recorded drainage easement.
II. SCHEDULE OF COMPLIANCE
1. Curb outlet swales, vegetated areas and other vegetated conveyances shall be constructed in
their entirety, vegetated, and be operational for their intended use prior to the construction of
any built -upon surface, per the approved plans
2. During construction, erosion shall be kept to a minimum and any eroded areas of the swales or
other vegetated conveyances will be repaired immediately.
3. The permittee shall at all times provide the operation and maintenance necessary to operate
the permitted stormwater management systems at optimum efficiency to include:
a. Inspections
b. Sediment removal.
C. Mowing, and re -vegetating of the side slopes.
d. Immediate repair of eroded areas.
e. Maintenance of side slopes in accordance with approved plans and specifications.
f. Cleaning and repair of catch basin grates, flumes, piping, and the flow spreader
mechanism.
g. Maintenance of level spreaders and infiltration areas, in accordance with approved
plans.
4. 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 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 or to the drainage area.
e. Further subdivision, acquisition or sale of the project area. The project area is defined
as all property owned by the permittee, for which Sedimentation and Erosion Control
Plan approval was sought.
f. Filling in, piping, or altering any vegetative conveyance shown on the approved plan.
5. The permittee shall submit all information requested by the Director or his representative within
the time frame specified in the written information request.
6. Deed restrictions are incorporated into this permit by reference and must be recorded with the
Office of the Register of Deeds prior to the sale of any lot.

5. The permittee grants permission to DENR Staff to enter the property during normal business
hours, for the purpose of inspecting all components of the 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 swales 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 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.
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.
Permit issued this the 27 th day of April 2011.
NORTH
ENVIRONMENTAL MANAGEMENT COMMISSION
Coleen H. Sullins, Director
Division of Water Quality
By Authority of the Environmental
S W7101005
for
Management Commission