SW7061222_CURRENT PERMIT_20070102

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW :��
DOC TYPE
CURRENT PERMIT
❑ APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
YYYYMMDD

Mr. Zee Lamb,
Bertie County
PO Box 5-30
County Manager
Windsor, NC 27983
Dear Mr. Lamb:
0'�iEd
Michael F. Easley, Governor
William G, Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E. Director
Division of Water Quality
January 2, 2007
Subject: Stormwater Permit No. SW7061222
Bertie County DSS
High Density Project
Bertie County
The Washington Regional Office received a complete Stormwater Management Permit
Application for Bertie County DSS on December 14, 2006. Staff review of the plans and
specifications has determined that the project, as proposed, will comply with the Stormwater
Regulations set forth in Title 15A NCAC 2H.1000. We are forwarding Permit No.
SW7061222, dated January 2, 2007, for the construction of the subject project.
This permit shall be effective from the date of issuance until January 2, 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 150E 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 Scott Vinson, or me at [phone].
incerely
L r:::�
Al odge
Regional Supervisor
Surface Water Protection Section
AH/sav: C:\STORMWATER\PERMIT\SW7061222
cc: Robert Bartlett, PE
Bertie County Building Inspections
vMshington Regional Office
Central Files
0.
NCarolina
�vaturatty
North Carolina Division of Water Quality Washington Regional Office Phone [phone] FAX [phone] Customer Service
Internet: sstivw.ncwatemualnv.ore 943 Washington Square Mall, Washington, NC 27889 1-877-623-6748
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- • State Stormwater Management Systems
Permit No. SW7061222
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
Bertie County
Bertie County DSS
Bertie County
FOR THE
construction, operation and maintenance of two wet detention ponds in compliance with the
provisions of 15A NCAC 2H .1000 (hereafter referred to as the "storm water rules') and the approved
stormwater management plans and specifications and other supporting data as attached and on file
with and approved by the Division of Water Quality and considered a part of this permit.
This permit shall be effective from the date of issuance until January 2, 2017 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.
This stormwater system has been approved for the management of stormwater runoff as
described in Section 1.6 on page 3 of this permit. The stormwater controls have been designed
to handle the runoff from 1.07 acres of impervious area to Pond #1 and 7.46 acres of
impervious area to Pond #2.
3. Approved plans and specifications for this project are incorporated by reference and are
enforceable parts of the permit. The runoff from all built -upon area within the permitted
drainage areas. of this project must be directed into the permitted stormwater control system.
4. The tract will be limited to the amount of built -upon area indicated on page 3 of this permit, and
per approved plans. Final plans, including drainage, for the built -upon area labeled as "Future"
on the approved plans must be submitted and approved by the Division of Water Quality prior
to the construction of the "Future" area.
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.
Page 2 of 7

State Stormwater Management Systems
Permit No. SW7061222
6. The following design elements have been permitted for these wet detention pond stormwater
facilities,
and must be provided in the system
at all times.
Drainage Areas:
POND #1
POND #2
a.
Drainage Area, acres:
1.55
10.15
b.
Total Impervious Surfaces, ft2:
46,750 (1.07ac.)
324,984 (7.46ac.)
C.
Pond Depth, feet:
3.00
4.00
d.
TSS removal efficiency:
90%
90%
e.
Design Storm:
1"
1"
f.
Permanent Pool Elevation, FMSL:
18.50
20.00
g.
Permitted Surface Area @PP, ft2:
5,466
28,348
h.
Storage Elevation, FMSL:
19.20
21.00
i.
Permitted Storage Volume, ft3:
4,124
30,405
j.
Controlling Orifice:
1.001,
3.00" 0 pipe
k.
Receiving Stream / River Basin:
UT to Cashie River /
Roanoke
I. _
Stream -Index Number:
24 - 2 - (1)
m.
Classification of Water Body:
"C; Sw"
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 outlet structure, orifice device, flow spreader, catch
basins and piping.
g. Access to the outlet structure must be available at all times.
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.
Page 3 of 7

State Stormwater Management Systems
Permit No. SW7061222
5. 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.
6. 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.
7. 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.
8. Access to the stormwater facilities shall be maintained via appropriate easements at all times.
9. 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.
13. This permit shall be effective from the date of issuance until January 2, 2017. Application for
permit renewal shall be submitted 180 days prior to the expiration date of this permit and must
be accompanied by the processing fee.
14. No homeowner/lot owner/developer shall fill in, alter, or pipe any drainage feature (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.
Page 4 of 7

State Stormwater Management Systems
Permit No. SW7061222
III. GENERAL CONDITIONS
This permit is not transferable except after notice to and approval by the Director. In the event
of a change of ownership, or a name change, the permittee must submit a formal permit
transfer request to the Division of Water Quality, accompanied by a completed
name/ownership change form, documentation from the parties involved, and other supporting
materials as may be appropriate. The approval of this request will be considered on its merits
and may or may not be approved. The permittee is responsible for compliance with all permit
conditions until such time as the Division approves the transfer request.
2. Failure to abide by the conditions and limitations contained in this permit may subject the
Permittee to enforcement action by the Division of Water Quality, in accordance with North
Carolina General Statute 143-215.6A to 143-215.6C.
3. The issuance of this permit does not preclude the Permittee from complying with any and all
statutes, rules, regulations, or ordinances, which may be imposed by other government
agencies (local, state, and federal) having jurisdiction.
4. In the event that the facilities fail to perform satisfactorily, including the creation of nuisance
conditions, the Permittee shall take immediate corrective action, including those as may be
required by this Division, such as the construction of additional or replacement stormwater
management systems.
5. The permittee grants DENR Staff permission to enter the property during normal business
hours for the purpose of inspecting all components of the permitted stormwater management
facility.
6. The permit may be modified, revoked and reissued or terminated for cause. The filing of a
request for a permit modification, revocation and reissuance or termination does not stay any
permit condition. _.
7. Unless specified elsewhere, permanent seeding requirements for the stormwater control must
follow the guidelines established in the North Carolina Erosion and Sediment Control Planning
and Design Manual.
8. Approved plans and specifications for this project are incorporated by reference and are
enforceable parts of the permit. 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.
9. The permittee shall notify the Division of any name, ownership or mailing address
changes within 30 days.
Permit issued this the 2"d day of January, 2007.
CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
for
Hian vv. KumeK, r.t., uirector
Division of Water Quality
By Authority of the Environmental Management Commission
Permit No. SW7061222
Page 5 of 7

State Stormwater Management Systems
Permit No. SW7061222
Bertie County DSS
Stormwater Permit No. SW7061222
Bertie 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 6 of 7

State Stormwater Management Systems
Permit No. SW7061222
Certification Requirements:
1. The drainage area to the system contains approximately the permitted acreage.
2. The drainage area to the system contains no more than the permitted amount of built -
upon area.
3. All the built -upon area associated with the project is graded such that the runoff drains
to the system.
4. All roof drains are located such that the runoff is directed into the system.
5. The outlet/bypass structure elevations are per the approved plan.
6. The outlet structure is located per the approved plans.
7. Trash rack is provided on the outlet/bypass structure.
8. All slopes are grassed with permanent vegetation.
9. Vegetated slopes are no steeper than 3:1.
10. The inlets are located per the approved plans and do not cause short-circuiting of the
system.
11. _ The permitted amounts of surface area and/or volume have been provided.
12. Required drawdown devices are correctly sized per the approved plans.
13. All required design depths are provided.
14. All required parts of the system are provided, such as a vegetated shelf, and a forebay.
15. The required system dimensions are provided per the approved plans.
cc: NCDENR-DWQ Regional Office
Bertie County Building Inspections
Page 7 of 7

y, State of North Carolina —: aWA CK j/�i-f-/6(
kE Department of Environment and Natural Resources
g
Division of Water Quality
( I 1 200SG,I,ORMWATER MANAGEMENT PERMIT APPLICATION FORM Of ; J-
°S/� This form may be photocopied for use as an original
I. GENERAL INFORMATION
I. Applicants name (specify the name of the corporation, individual, etc. who owns the project)
Bertie County
2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
Zee Lamb / County Manager
3. Mailing Address for person listed in item 2 above:
P.O. Box 530
City: Windsor State: NC Zip: 27983
Telephone Number: ( 252 )-794-5300
4. Project Name (subdivision, facility, or establishment name - should be consistent with project narne on plans,
specifications, letters, operation and maintenance agreements, e(c.):
Bertie County DSS
5. Location of Project (street. address):
1415 S. King St. (U.S Hwy 17)
City: Windsor County: Bertie
6. Directions to project (from nearest major intersection):
Approximately 800 feet west of the intersection of US Hwy 17 (King St) and NC Hwy 308
7. Latitude: 35.9876 N Longiwde: 76.9258'W,(NAD83/WGS84) of project
8. Contact person who can answer questions about the project:
Name: Jon Meade Telephone Number: 252 )-399-0704
II. PERMIT INFORMATION:
1. Specify whether project is (check one): X New Renewal Modification
Form SWU-101 Version 3.99 Page I of

KFQ I

2. If this application is being submitted as the 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 X High Density Redevelop General Permit Other
4. Additional Project Requirements (check applicable blanks):
CAMA Major X Sedimentation/Erosion Control _404/401 Permit X NPDES Stormwater
Information on required state permits can be obtained by contacting the Customer Service Center at.
1-877-623-6748.
Ill. PROJECT INFORMATION
1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative
(one to two pages) describing slormwater management for the project .
Stormwater captured for all built upon area is directed to one of two wet detention basins.
2. Stormwater runoff from this projectdrains to the
3. Total Project Area: 15.70
5. How many drainage areas does the project have?
Roanoke
River basin.
4. Project Built Upon Area: � 56 %
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.
Pond 1 (Small Pond)
Pond 2 (Larae Pond)
Basin'Informadon
Drainage Area 1
^Drainage'Aiea'2'
Receiving Stream Name
UT to Cashie River
UT to Cashie River
Receiving Stream Class
C SW
C;Sw
Drainage Area
1.55 Acres
10.15 Acres
Existing Impervious* Area
0.0 Acres
0.0 Acres
Proposed Impervious'Area
1.073 Acres
7.46 Acres
Impervious Area (total)
69.14
73.49
Impervious` Surface Area'
Drainage Area 1 " ',
' '-' Drainage Area 2 .
On -site Buildings
N/A
18,579
On -site Streets / Parking
18,800 sq It
53,636 sq ft
On -site Future
27,950 sq ft
238,307 sq It
On -site Sidewalks
N/A
2,962 sq it
Other on -site Future Reserve
N/A
11,500 sq ft
Off -site
N/A
Total: 46,750 sq fU 1.073 Acres
Total: 324,984 sq ft/ 7.46 Acres
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 4

7. I -low was the off -site impervious area listed above derived? NIA
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 stormwater management permit number
as issued by the Division of Water Quality. These covenants may not he
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 cannotbe changed or deleted
without concurrence from the Stale, 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 mustbe submitted for each
BMP specified for this project. Contact the Stormwater and General Permits Unit at [phone] 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
Fonn SWU-101 Version 3.99 Page 3 of

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.
• 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 casements, 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):
Bartlett Engineering and Surveying, PC
Mailing Address: 1906 Nash Street North
City: Wilson
Phone: ( 252 )-399-0704
VIII. APPLICANT'S CERTIFICATION
NC
Fax: ( 252 )-399-0804
27893
1, (print or type name of person listed in General Information, item 2) Zee Lamb, County Manager
certify that the information included on this permitapplication 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 % ' be rQyorded, and that the proposed project complies with the requirements of 15A
NCAC 2H .1000. //
Date://-/Q -e9z
Form SWU-101 Version 3.99 Page 4 of

Permit No. ) wr-%y � /a 1�2
(to he provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
"STORMWATER MANAGEMENT PERMIT APPLICATION FORM
DEC 14 2016 WET DETENTION BASIN SUPPLEMENT
This form may be photocopied for use as an original
DWO Stormwater Manaeement Plan Review
A complete stormwater management plan submittal includes an application form, a wet detention basin
supplement for each basin, design calculations, and plans and specifications showing all basin and outlet
structure details.
I. PROJECT INFORMATION
Project Name: Bertie County DSS
Contact Person: Jon Meade Phone Number: ( 252)-399-0704
For projects with multiple basins, specify which basin this worksheet applies to: Pond #2 (Large Pond)
elevations
Basin Bottom Elevation 16.0 ft. (floor of the basin)
Permanent Pool Elevation 20.0 ft. (elevation of the orifice)
Temporary Pool Elevation 21.0 ft. (elevation of the discharge structure overflow)
areas
Permanent Pool Surface Area 28348 sq. ft. (water surface area at the orifice elevation)
Drainage Area 10.15 ac. (on -site and off -site drainage to the basin)
Impervious Area 7.46 ac. (on -site and off -rite drainage to the basin)
volumes
Permanent Pool Volume 80348 cu. ft. (combined volume of main basin and forebav)
Temporary Pool Volume 30405 cu. ft. (volume detained above the permanent pool)
Forebay Volume 15839 cu. ft. (approximately 20% of total volume)
Other parameters
SA/DAI 6.40required/6.41 provided (surface area to drainage area ratio from DWQ table)
Diameter of Orifice 3.0 in. (2 to 5 day temporary pool draw -down required)
Design Rainfall 1.0 in.
Design TSS Removal z 90 % (minimum 85% required)
Form SWU-102 Rev 3.99 Page I of 4

Footnotes:
' When using the Division SAIDA tables, the correct SAIDA ratio for permanent pool sizing should be computed based upon the
actual impervious % and permanent pool depth. Linear interpolation should be employed to detennine the correct value for non-
standard table entries.
2 In the 20 coastal counties, the requirement for a vegetative filter may be waived if the wet detention basin is designed to provide
90% TSS removal. The NCDENR BMP manual provides design tables for both 85% TSS removal and 90% TSS removal.
H. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Stormwater Best Management Practices Manual
(N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code
Section: 15 A NCAC 2H A008.
Initial in the space provided to indicate the following design requirements have been met and supporting
documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit
Application Form, the agent may initial below. If a requirement has not been met, attach justification.
Is
a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet).
b. The forebay volume is approximately equal to 20% of the basin volume.
c. The temporary pool controls runoff from the design storm event.
d. The temporary pool draws down in 2 to 5 days.
c. If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow
calculations)
f. The basin length to width ratio is greater than 3:1.
g. The basin side slopes above the permanent pool are no steeper than 3:1.
h. A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail).
J_
k.
Vegetative cover above the permanent pool elevation is specified.
A trash rack or similar device is provided for both the overflow and orifice.
A recorded drainage easement is provided for each basin including access to nearest right-
of-way.
If the basin is used for sediment and erosion control during construction, clean out of the
basin is specified prior to use as a wet detention basin.
m. A mechanism is specified which will drain the basin for maintenance or an emergency.
III. WET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the
vegetated filter if one is provided.
This system (check one) 0 does oes not incorporate a vegetated filter at the outlet.
This system (check one) 0 does oes not incorporate pretreatment other than a forebay.
Forni SWU-102 Rev 3.99 Page 2 of

Maintenance activities shall be performed as follows:
After every significant runoff producing rainfall event and at least monthly:
a. Inspect the wet 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.
3. Inspect and repair the collection system (i.e. catch basins, piping, swalcs, riprap, etc.) quarterly to maintain
proper functioning.
4. Remove accumulated sediment from the wet 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 wet 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.
When the permanent pool depth reads 3.0 feet in the main pond, the sediment shall be removed.
When the permanent pool depth reads 3.0 feet in the forebay, the sediment shall be removed.
BASIN DIAGRAM
011 in the blanks)
0 Pennanent Pool Elevation 20.0
Sediment Re oval El. 17.0 75 0
--'
- Sediment Removal Elevation 17.0 75%
Bottom Ele ation 16.0 % - ""'---------' -----
Bottom Elevation 16.0 25°��
FOREBAY MAIN POND
Remove cattails and other indigenous wetland plants when they cover 50% of the basin surface. These
plants shall be encouraged to grow along the vegetated shelf and forebay berm.
6. If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through
the emergency drain shall be minimized to the maximum extent practical.
Form SWU-102 Rev 3.99 Page 3 of 4

7. All components of the wet detention basin system shall be maintained in good working order.
I acknowledge and agree by my signature below that I am responsible for the performance of the seven
maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any
changes to the system or responsible party.
Print name: Zee Lamb
Title
Address
Bertie County Manager
P.O. Box 530 Windsor, NC 27983
Note: The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and a
resident of the subdivision has been named the president.
I, 0 -14 IU � 'vY/S a Notary Public for the State of
County of do hereby certify that Z.1
personally appeared before me this 35L�) day of 03vtrlj:�ei 2� , and acknowledge the due
execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal,
SEAL
My commission expires 1"�_ 3 -
form SWU-102 Rev 3.99 Page 4 of 4

Permit No. �titt r/ (i(v )_(
(to be provider/ by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
"t`STORMWATER MANAGEMENT PERMIT APPLICATION FORM
DEC 1 4 246 WET DETENTION BASIN SUPPLEMENT
This form may be photocopied for use as an original
DWO Stormwater Management Plan Review:
A complete stormwater management plan submittal includes an application form, a wet detention basin
supplement for each basin, design calculations, and plans and specifications showing all basin and outlet
structure details.
I. PROJECT INFORMATION
Project Name: Bedie County DSS
Contact Person: Jon Meade Phone Number: ( 252)-399-0704
For projects with multiple basins, specify which basin this worksheet applies to: Pond #1 (Small Pond)
elevations
Basin Bottom Elevation 15.5 ft. (floor of the basin)
Permanent Pool Elevation 18.5 ft. (elevation of the orifice)
Temporary Pool Elevation 19.2 ft. (elevation of the discharge structure overflow)
areas
Permanent Pool Surface Area 5466 sq. ft. (water surface area at the orifice elevation)
Drainage Area 1.55 ac. (on -site and off -site drainage to the basin)
Impervious Area 1.073 ac. (on -site and off -site drainage to the basin)
volumes �'r /W�g)oG
Permanent Pool Volume 9487 cu. ft. (combined volume of main basin and forebay)
(A"" e U. Robo.d ewr{� PE
Temporary Pool Volume cu. ft. (volume detained/above the permanent pool)
Forebay Volume 2147 cu. ft. (approximately 20% of total volume)
Other parameters
SA/DA i 8.06required/8.08 provided (stnface area to drainage area ratio from DWQ table)
Diameter of Orifice 1.0 in. (2 to 5 day temporary pool draw -down required)
Design Rainfall 1.0 in.
Design TSS Removal 2 90 % (minimum 85% required)
Form SWU-102 Rev 3.99 Page 1 of 4

Footnotes:
When using the Division SA/DA tables, the correct SAMA ratio for permanent pool sizing should be computed based upon the
actual impervious % and permanent pool depth. Linear interpolation should be employed to determine the correct value for non-
standard table entries.
2 In the 20 coastal counties, the requirement for a vegetative filter may be waived if the wet detention basin is designed to provide
90% TSS removal. The NCDL"NR BMP manual provides design tables for both 85% TSS removal and 90% TSS removal.
H. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Stormwater Best Management Practices Manual
(N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code
Section: 15 A NCAC 2H .1008.
Initial in the space provided to indicate the following design requirements have been met and supporting
documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit
Application Form, the agent may initial below. If a requirement has not been met, attach justification.
Applicants Initials
a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet).
b. The forebay volume is approximately equal to 20% of the basin volume.
c. The temporary pool controls runoff from the design storm event.
d. The temporary pool draws down in 2 to 5 days.
c. If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow
calculations)
f. The basin length to width ratio is greater than 3:1.
g. The basin side slopes above the permanent pool are no steeper than 3:1.
h. A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail).
i. Vegetative cover above the permanent pool elevation is specified.
j. A trash rack or similar device is provided for both the overflow and orifice.
k. A recorded drainage easement is provided for each basin including access to nearest right-
of-way.
If the basin is used for sediment and erosion control during construction, clean out of the
basin is specified prior to use as a wet detention basin.
in. A mechanism is specified which will drain the basin for maintenance or an emergency.
III. WET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the
vegetated filter if one is provided.
This system (check one) 0 does 0'& s not incorporate a vegetated filter at the outlet.
This system (check one) 0 does ;does not incorporate pretreatment other than a forebay.
Form SWU-102 Rev 3.99 Page 2 of 4

Maintenance activities shall be performed as follows:
After every significant runoff producing rainfall event and at least monthly:
a. Inspect the wet 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.
3. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, cte.) quarterly to maintain
proper functioning.
4. Remove accumulated sediment from the wet 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.c
stockpiling near a wet detention basin or stream, ctc.).
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.
When the permanent pool depth reads 2.25 feet in the main pond, the sediment shall be removed.
When the permanent pool depth reads 2.25 feet in the forebay, the sediment shall be removed.
BASIN DIAGRAM
(fill in the blanks)
0 Permanent Pool Elevation 18.5
Sediment [Z
enal El. 16.25 75^ 16.25 /
------------- Sediment Removal Elevation 75%
Bottomtion15-.5 T / --------------------------------------------- -------
FOREBAY
Bottom Elevation 15.5 125%
MAIN POND
Remove cattails and other indigenous wetland plants when they cover 50% of the basin surface. These
plants shall be encouraged to grow along the vegetated shelf and forebay berm.
6. If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through
the emergency drain shall be minimized to the maximum extent practical.
Form SWU-102 Rev 3.99 Page 3 of 4

7. All components of the wet detention basin system shall be maintained in good working order.
1 acknowledge and agree by my signature below that I am responsible for the performance of the seven
maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any
changes to the system or responsible party.
Print name: Zee Lamb
Title: Bertie County M
Note: The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and a
resident of the subdivision has been named the president.
1, ) t I65 L i �O—A , a Notary Publicforthe State of �� ���,..c� ,
County of c
, do hereby certify that k.e_ 13. L"
personally appeared before me this gUi day of 2ccl, and acknowledge the due
execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal,
11 I
My commission
Form SWU-102 Rev 3.99 Page 4 of 4