SW7070726_CURRENT PERMIT_20070830

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW %D1D7 0
DOC TYPE
CURRENT PERMIT
❑ APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE,
YYYYM M DD

W�t�o
Michael F. Easley, Governor
1
i William G. Ross Jr., Secretary
r- North Carolina Department of Environment and Natural Resources
.� Coleen H. Sullins, Director
Division of Water Quality
August 30, 2007
Mr. David Clifton, Assistant Superintendant
Craven County Schools
3600 Trent Road
New Bern, NC 28562
Subject: Permit No. SW7070726
JT Barber Elementary School &
Bus Maintenance Garage Renovation
High Density Stormwater Project
Craven County
Dear Mr. Clifton:
The Washington Regional Office received a complete Stormwater Management Permit
Application for JT Barber Elementary School and Bus Maintenance Garage Renovation on
August 29, 2007. 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. SW7070726 dated August 30, 2007, for the
construction of the subject project.
This permit shall be effective from the date of issuance until.August 30, 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 and in the submitted application.
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.
If you have any questions, or need additional information concerning this matter, please
contact either Scott Vinson, or me at [phone].
Af H"odgg���
Regional Superv' or
Surface Water Protection Section
AH/sav: C:\STORMWATER\PERMIT\SW7070726
cc: Robert Knopf; PE - Baldwin & Associates
Craven County Building Inspections
Cjty of New Bern Building Inspections
✓Washington Regional Office
Central Files ,vo Carolina
Naturally
North Carolina Division of Water Quality Washington Regional Office Phone [phone] FAX [phone] Customer Service
lolemet: waw.ncwateraualitv.ore 943 Washington Square Mall, Washington, NC 27889 1-877-623-6748
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State Stormwater Management Systems
Permit No. SW7070726
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
Craven County Schools
JT Barber Elementary School and
Bus Maintenance Garage Renovation
Craven County
FOR THE
construction, operation and maintenance of a wet detention basin 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 August 30, 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 in Section 1.6 on page 3 of this permit. The stormwater controls have been
designed to handle the runoff from 5.20 acres of impervious area.
3. All stormwater collection and treatment systems must be located in either dedicated
common areas or recorded easements. The final plats for the project will be recorded
showing all such required easements, in accordance with the approved plans and permit.
4. The tract will be limited to the amount of built -upon area indicated on page 3 of this
permit, and per approved plans. The runoff from all built -upon area within the permitted
drainage areas of this project must be directed into the permitted stormwater control
system.
5. Approved plans and specifications for this project are incorporated by reference and are
enforceable parts of the permit.
Page 2 of 8

State Stormwater Management Systems
Permit No. SV 7070726
6. The following design criteria have been provided in the wet detention pond and must be
maintained at design condition:
a.
Drainage Area, acres:
7.10
b.
Total Impervious Surfaces, ftZ:
226,511
C.
Design Storm, inches:
1.0
d.
Pond Depth, feet:
6.50
e.
TSS removal efficiency:
85%
f.
Permanent Pool Elevation, FMSL:
3.40
g.
Permanent Pool Surface Area, ftZ:
10,289
h.
Permanent Storage Volume, ft3:
37,158
i.
Permitted Forebay Volume, ft3:
7,432
j.
Temporary Storage Elevation, FMSL:
5.10
k.
Temporary Storage Volume, ft3:
19,036
I.
Controlling Orifice:
2.00" � pipe
M.
Receiving Stream/River Basin:
Jack Smith Creek / Neuse
n.
Stream Index Number:
27 - 100
o.
Classification of Water Body:
"C; Sw, NSW"
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 Plans 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. Mowin.9 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 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 8

State Stormwater Management Systems
Permit No. SW7070726
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.
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. A copy of the approved plans and specifications shall be maintained on file by the
Permittee for the life of the project.
11. 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.
12. This permit shall be effective from the date of issuance until August 30, 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.
13. 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.
14. Prior to transfer of the permit, the stormwater facilities will be inspected by DWQ
personnel. The facility must be in compliance with all permit conditions. Any items not in
compliance must be repaired or replaced to design condition prior to the transfer.
Records of maintenagce activities performed to date will be required.
Page 4 of 8

State Stormwater Management Systems
Permit No. SV 7070726
15. Prior to the sale of any lot, the following deed restrictions must be recorded:
a. The following covenants are intended to ensure ongoing compliance with State
Stormwater Management Permit Number SW7070726, 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. Construction of additional built -upon area in excess of 226,511 square feet, as
noted in the permit and on the approved plans, will require a permit modification.
g. All runoff on the lot must drain into the permitted system.
h. Filling in or piping of any vegetative conveyances (ditches, swales, etc.)
associated with this development, except for average driveway crossings, is
strictly prohibited by any persons.
16. A copy of the recorded deed restrictions must be submitted to the Division within
30 days of the date of recording the plat, and prior to selling lots. The recorded
copy must contain all of the statements above, the signature of the Permittee, the
deed book number and page, and the stamp/signature of the Register of Deeds.
17. Built upon area includes, but is not limited to, structures, asphalt, concrete, gravel, brick,
stone, slate, coquina and parking areas, but does not include raised, open wood decking,
or the water surface of swimming pools.
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.
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.
Page 5 of 8

State Stormwater Management Systems
Permit No. SW7070726
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.
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.
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.
The permittee shall notify the Division any name, ownership or mailing address changes
within 30 days.
Permit issued this the 30th day of August, 2007.
CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
for
Coleen H. Sullins, Director
Division of Water Quality
By Authority of the Environmental Management Commission
Permit Number SW7070726
Page 6 of 8

State Stormwater Management Systems
Permit No. SW7070726
JT Barber Elementary School and Bus Maintenance Garage Renovation
Stormwater Permit No. SW7070726
Craven 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 7 of 8

State Stormwater Management Systems
Permit No. SW7070726
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.
cc: NCDENR-DWQ Regional Office
Craven County Building Inspections
City of New Bern Building Inspections
Page 8of8

It
OFFICE USE ONLY
Date Received Fee Paid Permit Number
y Z30
State of North Carolina (1 r Rn r,—
Department of Environment and Natural Resources ✓✓ l0
Division of Water Quality rF 11
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This form may be photocopied for use as an original JUL 3 0 2007
L GENERAL INFORMATION I.
1. Applicants name (specify the name of the corporation, individual, etc. who owns the project):
Craven County Schools
2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
David Clifton, Assistant Superintendent
3. Mailing Address for person listed in item 2 above:
3600 Trent Road
City: New Bern State: NC zip: 28562
Telephone Number: ,( 252 ) 514-6300
4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
JT Barber Elementary School And Bus Maintenance Garaae Renovation
5. Location of Project (street address):
1700 Cobb Street
City: New Bern County: Craven
6. Directions to project (from nearest major intersection):
Southeast on Neuse Blvd., Northeast then Southeast on Hazel Rd., Southeast
on Washington St., then North on Cobb St.
7. Latitude: N35d-7' Longitude: W77d-4' of project
8. Contact person who can answer questions about the project:
Name: Robert J. Knopf, Jr., P.E. Telephone Number: ( 252
IL PERMIT INFORMATION:
1. Specify whether project is (check one):
=New Renewal
Form SWU-101 Version 3.99 Pagel of4
756-1390
0 Modification

il
T Ir

Z. If this application is being submitted as the result of a renewal or modification to an existing permit, list the
existing permit number and its issue date (if known)
3. Specify the type of project (check one):
_=_Low Density = High Density =_Redevelop .=_Ceneral Permit _= Other
4. Additional Project Requirements (check applicable blanks):
QCAMA Major _=Sedimentation/Erosion Control 0404/401 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
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 .
Sheet flow into proposed storm sewer system, treated with a wet detention pond, then
released into existinq swale
2. Stormwater runoff from this project drains to the
Neuse
River basin.
3. Total Project Area: 7.1 acres
4.
Project Built Upon Area: 38.87
5. How many drainage areas does the project have?
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
r Drainage Area 1
Drainage Area 2
Receiving Stream Name
Jack Smith Crk,
Receiving Stream Class
C ; L.) LJ a
Drainage Area
7.10 acres
17.2 acres
Existing Impervious' Area
5.96 acres
7.01 acres
Proposed Impervious'Area
5.20 acres
6.24 acres
% Impervious' Area (total)
73.24%
36.28%
Impervious' Surface Area
Drainage Area 1
Drainage Area 2
On -site Buildings
69,260 sf, 1.59 ac
2.35 acres
On -site Streets
0 square feet
0
On -site Parking
157,251 sf, 3.61 ac
4.66 acres
On -site Sidewalks
0 square feet
0
Other on -site
0 square feet
0
Off -site
Total: 226,511 sf, 5.20 ac
Total: 7.01 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. 1-low was the off -site impervious area listed above derived? N/A
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 or any lot. If lot sizes vary significantly, a table
listing each lot number, size and the allowable built -upon area for each lot mustbe provided as an attachment.
1. The following covenants are intended to ensure ongoing compliance with state stormwater management permit number
N/A as issued by the Division of Water Quality. These covenants may not be.
changed or deleted without the consent of the State.
2. No nrore than N/A 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 frorn outparcels or future development shall be directed into the permitted stormwater control
system. These connections to the slorinwater control systern 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 fornds) listed below must be submitted for each
BMP specified for this project. Contact the Storrnwater 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 4

VI. SUBMI.17AL 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 te.ae-
• One copy of the applicable Supplement Form(s) for each BMP R-»
• Permit application processing fee of $420 (payable to NCDENR) ft�1L
• Detailed narrative description of stormwater treatment/management Rsv-
• Two copies of plans and specifications, including KSir-
- 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): Todd Smith, Hite Associates
Mailing Address: 2600 Meridian Drive
City: Greenville State: NC Zip: 27834
Phone: ( 252 ) 757-0333 x 6 Fax: ( 252 ) 757-1330
VIII. APPLICANT'S CERTIFICATION
I, (print or type name of person listed in General Lrronnation, item 2) David Clifton
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.
Date: %
Form SWU-101 Version 3.99 Page 4 of 4

Rua 29 2007 9:30RM BRL➢WIN & RSSOCIRTES 2523211412 __p._3
Permit No.
a be provided by t)WQ�
PVGg 100� State of North Carolina
2 De artment of Environment and Natural Resources
DwQ Division of Water Quality
p4p5 # STORNfWATER MANAGEMENT PERMIT APPLICATION FOR
WET DETENTION BASIN SUPPLEMENT
This farm may be photocopied for use as an original
D) O Stotmwater Managemen[ Plan fZeview:
A complete stormwatcr management plan submittal includes an application form, a iet detention basin
supplement for each basin, design calculations, and plans and specifications showing ill basin and outlet
structure details.
I. PROJECT INFORMATION
Project Name: _ JT Barber Elementary School and Bus Maintenance Garag6
Contact Person: Robert J. Knopf, Jr. P.E. Phone Number: (252 )_ 756-1
For projects with multiple hasins, specify which basin this worksheet applies to:
elevations
Basin Bottom Elevation -3.1 ft. Vloor of the basin)
Permanent Pool Elevation 3.40 ft. (elevation of the orylee)
Temporary Pool Elevation 5.10 fL (elevation of the discharge structure
areas
Permanent Pool Surface Area 10,269 sq. ft. (water surface area at the orifice el
Drainage Area 7.1 ac. (on -site and off -site drainage to the
Impervious Area 52 _ ac. (on -site and off -site drainage to the
volumes
Permanent Pool Volume
Temporary Pool Volume
Forebay Volume
Other parameters
SA/DAI
Diameter of Orifice
Design Rainfall
Design TSS Removal -
37158 cu. ft. (combined volume of main basin and
-19036 0_ cu, ft (volume detained above the pennane,
7432 • _ cu. ft. (approximately 20% of total volume)
2_57 (staface area to drainage area ratio,
2 in. (2 to 5 drry temporary pool draw -do
3.7 _ in.
85 % (minimum R.5% required)
Fonn SWU-IO2 Res• 3 K) Puce 1 of 4
m DWQ table)
i required)

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 determine the correct value for non-
standard table entries.
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.
If. 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
0.y-
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.
eye
c.
The temporary pool controls runoff from the design storm event.
1.3r
d.
The temporary pool draws down in 2 to 5 days.
R-Al
e.
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.
aye
k.
A recorded drainage easement is provided for each basin including access to nearest right-
of-way.
a
I.
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.
R>�
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) Q does O does not incorporate a vegetated filter at the outlet.
This system (check one) 0 does Q does not incorporate pretreatment other than a forebay.
Form SWU-102 Rev 3.99 Page 2 of 4

Footnotes:
t 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 detemtine 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 DMI' manual provides design tables for both 85%TSS removal and 90%TSS removal.
H. REQUIRED I7'IsNIS CIIECKI.IS•I'
The following checklist outlines design requirements per the Stormwater Best Management Practices Manual
(N.C. Department of Environment, I Iealth and Natural Resources, February 1999) and Administrative Code
Section: IS A NCAC 211 .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 Stomiwater Management Permit
Application Form, the agent may initial below. If a requirement has not been met, attach justification.
Applicants Initials
R)�- a. The pemtancnt pool depth is between 3 and 6 feet (required mininnum of 3 feet).
P-tL b. The forebay volume is approximately equal to 20% of the basin volume.
e)r c. The temporary pool controls runoff from the design storm event.
d. The temporary pool draws down in 2 to 5 days.
e. 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.
It. A submerged and vegetated perimeter shelf with a slope of 6:1 or Tess (show detail).
i. Vegetative cover above the permanent pool elevation is specified.
0.�k j. A trash rack or similar device is provided for both the overflow and orifice.
2W- k. A recorded drainage easement is provided for each basin including access to nearest right-
of-way.
a I. 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.
Ill. `.VET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
The wet detention basin system is defined as the wet detention basin, pretreatment including forcbays and the
vegetated filler if one is provided.
This system (check one) Q does does not incorporate a vegetated filter at the outlet.
This systent (check one) Q (toes Q does not incorporate pretreatment other than a forebay.
Form SWU-102 Rev 3.99 Page 2 ol'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, 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 accumylate sediments.
4 90 /l; lj/ Y/a?lo7
When the pernanent pool depth reads .3r0' feet nthe main pond, the sediment shall be removed.
feet
When the permanent pool depth reads,,3-0� N Meet in the forebay, the sediment shall be removed.
BASIN DIAGRAM J
(fill in the blanks)_1i
Permanent Pool Elevatio❑ 3.4
Sediment Ren oval 1 -1 .5 75' u
--------- ------ Sediment Removal Elevation -1 .5 75%
Bottom Ele ation -3.1 "/o ------------------------------
Bollom Elevation -3.1 25% /
EOREBAY MAIN POND
5. 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.
Porn Swl1-IO2 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 1 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: Craven County Schools, David Clifton
Title: Assistant Superintendent
3600 Trent Road, New Bern, NC 28560
252-514-6300
Date: % O 7 rr
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, ?looCx a Notary Public for the State of
County of bONt rN , do hereby certify that David Clifton
personally appeared before me this LP ah day of :Ylt-1 u 2007 , and acknowledge the due
execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal,
o
C2
a `:
� i i JOO
SEAL
My commission expires D• G , DOI 0
Form SWU-1021I Rev 3.99 Page 4 of
North Carolina

';r".
Permit No.
(to he provided by DIVQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
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.
1. PROJECT INFORMATION
Project Name: JT Barber Elementary School and Bus Maintenance Garaco
Contact Person: Robert J. Knopf, Jr., P.E. Phone Number: ( 252 ) 756-1390
For projects with multiple basins, specify which basin this worksheet applies to:
elevations
Basin Bottom Elevation -3.1 R
Permanent Pool Elevation 3.40 ft.
Temporary Pool Elevation 5.10 ft.
(floor of the basin)
(elevation of the orifice)
(elevation of the discharge structure overfox,)
areas
Pernianent Pool Surface Area 10,289 sq. ft. (water sulfate area at the orifice elevation)
Drainage Area 7.1 ac. (on -site and off -site drainage to the basil)
Impervious Area 5.2 ac. (on -site and off -site drainage to the basin)
volumes
Permanent Pool Volume 37158 cu. ft. (combined volume ofntain basin andforebay)
Temporary Pool Volume 19036 cu. ft. (volume detained above the permanent pool)
Forebay Volume 7432 cu. ft. (approximately 20% of total volume)
Other parameters
SA/DA1 2.57 (surface area to drainage area ratio from DIVQ table)
Diameter of Orifice 2 in. (2 to 5 day temporary pool draw -down required)
Design Rainfall 3.7 in.
Design TSS Removal 2 85 % (innuitnum 85% required)
Form SWU-102 Rev 3.99
Page I of 4

J
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 NCDENR RMI' manual provides design tables for both 85% TSS removal and 90% TSS removal.
11. REQUIRED 1'1'EA1S 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 21-1 .I008.
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
R)K a. The permanent pool depth is between 3 and 6 feel (required minimum of 3 feet).
eyw b. The forebay volume is approximately equal to 20% of the basin volume.
>� c. The temporary pool controls runoff from the design storm event.
�r d. The temporary pool draws down in 2 to 5 days.
R5� e. If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow
calculations)
Fy2-
g.
RW
k.
a�
1
The basin length to width ratio is greater than 3:1.
The basin side slopes above the permanent pool are no steeper than 3: I.
A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail).
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.
in. A mechanism is specified which will drain the basin for maintenance or an emergency.
Ill. VET 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) Q does does not incorporate a vegetated filter at the outlet.
This system (check one) does Q does not incorporate pretreatment other than a forebay.
Pornt 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.
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, 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 pcnnanent pool depth reads 3.0 feet in the forebay, the sediment shall be removed.
BASIN DIAGRAM
(fill in the blonks)
17 Permanent Pool Elevation 3.4
Sediment Ren oval I-1 -1 .5 75 0
-------- --- -_--__Sediment Removal Elevation - ° 1.5 75/�
Douom Eleation -3.1 �/p ....
Bottom Elevation -3.1 25%
EOREDAY
MAIN POND
5. 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 mi in ii-reed to the maximum extent practical.
Form SwU-102 Rev 3.99 Page 3 of 4

i
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: Craven County Schools, David Clifton
Title: Assistant Superintendent
Address: 3600 Trent Road, New Bern, NC 28560
.�. OCn CA A COnn
Date:_ /
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, E - -CC - JQDC.Y-i , a Notary Public for the State of
County of Cave 11 do hereby certify that David Clifton
North Carolina
personally appeared before me this �171 h day of :R -IQj , 2007 , and acknowledge the due
execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal,
.......
'A f
,0 : •
D :r
SFAL
My commission expires ]X�C- 13 t DUI L)
FormSWU-102 Rev3.99 Page 4of4

f.
Permit No.
(to be provided by DIVQ�
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
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: JT Barber Elementary School and Bus Maintenance Garaco
Contact Person: Robert J. Knopf, Jr., P.E. Phone Number: ( 252 ) 756-1390
For projects with multiple basins, specify which basin this worksheet applies to:
elevations
Basin Bottom Elevation -3.1 ft.
Permanent Pool Elevation 3.40 ft.
Temporary Pool Elevation 5.10 ft.
(floor of the basin)
(elevation of the orifice)
(elevation of the discharge structure overflow)
areas
Permanent Pool Surface Area 10,289 sq. ft. (water surface area at the orifice elevation)
Drainage Area 7.1 ac. (on -.rite and off -site drainage to the basin)
Impervious Area 5.2 ac. (on -site and off -site drainage to the basin)
voltunes
Permanent Pool Volume
Temporary Pool Volume
Forebay Volume
Other parameters
SA/DAI
Diameter of Orifice
Design Rainfall
Design TSS Removal 2
Form SWU-102 Rev 399
37158 cu. ft. (combined volitme of main basin and foreb(iy)
19036 cu. ft. (vohune detained above the permanent pool)
7432 cu. ft. (approximately 20% of total volume)
2.57 (surface area to drainage area ratio from DlVQ table)
2 in. (2 to 5 day temporaty pool draw -down required)
3.7 in.
85 % (mininnun 85% required)
Page I 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 peranent pool depth. Linear interpolation should be employed to determine the correct value for non-
standard table entries.
In the 20 coastal counties, the requirement for a vegetative filter may be waived if the wet detention basin is designed to pmvidc
90% TSS removal. The NCDENR BMP manual provides design tables for both 85% TSS removal and 90% TSS removal.
IL REQUIRED 1.1'EMS CIIECKLIS-l'
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
R)K
a.
The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet).
e>w
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.
ZYG
e.
If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow
calculations)
R
f.
The basin length to width ratio is greater than 3:1.
F
g.
The basin side slopes above the pernmanent pool are no steeper than 3: I.
It.
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.
94—
j.
A trash rack or similar device is provided for both the overflow and orifice.
2�L
k.
A recorded drainage casement is provided for each basin including access to nearest right-
of-way.
a
1.
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.
F >U
in.
A mechanism is specified which will drain the basin for maintenance or an emergency.
Ill. VET 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) Q does 0 does not incorporate a vegetated filter at the outlet.
']'his system (check are) 0 does 0 does not incorporate pretreatment other than a forebay.
Form S WU-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, 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.
13ASIN DIAGRAM
(fill in the blanks)
V Penn:ment Pool Elevatio❑ 3.4
Sediment Ren oval U. -1 .5 75
-------- --- Sediment Removal Elevation 1.5 75%
Bottom 131c -anon -3.1 ^�a-------------------------------_--------------------
13ottom Elevation 3.1 25%
FORERAY
MAIN POND
5. 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.
G. 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 ol'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:
Craven Cc
Title:
Assistant Supe
Address:
3600 Trent F
Phony
252-514-6300
Date:_7_� ' Q
Schools, David Clifton
ntendent
New Bern, NC 28560
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, ,Re1n e'e �JDC_Y-) a Notary Public for the State of North Carolina
County of t1 do hereby certify that David Clifton
personally appeared before me this (r- day of 2007 , and acknowledge the due
execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal,
. •.�9 F
o
t •. � ;_
CS
SEAL
My commission
FonnSwU-102 Rev3.99
]'age 4 of 4