SW7070213_CURRENT PERMIT_20070620

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
Sw
DOC TYPE
L CURRENT PERMIT
(❑ APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
1z
YYYYMMDD

Michael F. Easley, Governors
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
June 20, 2007
Harold Blizzard, County Manager
Craven County
406 Craven Street
New Bern, NC 28560
.Subject: Stormwater Permit No. SW7070213
Craven County Judicial Center
High Density Project
Craven County
Dear Mr. Blizzard
Coleen H. Sullins, Director
Division of Water Quality
The Washington Regional Office received a complete Stormwater Management Permit
Application for Craven County Judicial Center on March 30, 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.
SW7070213 dated June 20, 2007, for the construction of the subject project.
This permit shall be effective from the date of issuance until June 20, 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 sixty (60) 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 Samir Dumpor, or me at [phone],
Sincere ,
-f-- -
I Hodge
Regional Supervisor
Surface Water Protection Section
cc: Joseph O'Buch, PE, Timmons Group (8642 W. Market Street, Suite 136,
Greensboro, NC 27409)
vZC aven County Building Inspections
shington Regional Office
Central Files
North Carolina Division of Water Quality Internet: �", w.nc\cnten�L1116 or, One
943 Washington Square Mall Phone [phone] No hCarolliina
Washington, NC 27889 Fax [phone]atut+QLL
An Equal Opportunity/Affirmative Action Employer —50%Recycled/10% Post Consumer Paper

State Stormwater Management Systems
Permit No. SW7070213
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
Craven County Judicial Center
FOR THE
construction, operation and maintenance of two bioretention areas and a wet detention
basin in compliance with the provisions of 15A NCAC 2H .1000 (hereafter referred to as
the "stormwater rules') and the approved stormwater management plans and
specifications and other supporting data as attached and on file -with and approved by
the Division of Water Quality and considered a part of this permit.
This permit shall be effective from the date of issuance until June 20, 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.
2. This stormwater system has been approved for the management of stormwater
runoff as described on page 3 of this permit, the Project Data Sheet. The
stormwater controls have been designed to handle the runoff from 337,152
square feet of impervious area.
3. The tract will be limited to the amount of built -upon area indicated on page 3 of
this permit, and per approved plans.
4. 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.
The runoff from all built -upon area within the permitted drainage area of this
project must be directed into the permitted stormwater control system.
The following design criteria have been provided in the bioretention areas and
must be maintained at design condition:
Page 2 of 8

7
State Stormwater Management Systems
Permit No. SW7070213
BIORETENTION AREAS — DESIGN DATA
Basin # 1 Basin # 2
a. Drainage Area, acres: 1.53 1.65
b. Total Impervious Surfaces, ftZ: 48,787 56,628
On -site Buildings and sideWalks, ftZ: 18,165 27,268
On -site roadway/parking, ft`: 30,622 29,360
C. TSS removal efficiency: 85%
d. Bioretention Depth, inches: 12.0
e. Temporary Ponded Depth Elevation, FMSL: 24.0
Bioretention Bottom Elevation, FMSL: 23.0. --
f. Bioretention Surface Area, ftZ: 3,991 4,722
g. Permitted Storage Volume, ft3. 3,983 4;547:1"]%'
Minimum. Required Volume, ft3: 3,937 4,623
h. Receiving Stream: Bachelor Creek
River Basin Neuse
i. Stream Index Number: 27-98
j. Classification of Water Body: "C; SW; NSW"
The following design criteria have been provided in the wet detention basiriarea
and must be maintained at design condition: -
WET DETENTION POND — DESIGN DATA
a. Receiving Stream: Bachelor Creek
b. Classification of Water Body:
C. Drainage area:
Total Impervious in drainage area:
d. Wet Pond Depth:
e. Required Storage Volume:
Provided Storage Volume:
f. Required Surface Area:
Provided Surface Area:
g. Controlling Orifice:
C; SW; NSW
8.70 ac
231,737 sf
3.0 ft
18,960 cf
18,974 cf
19,384 sf
19,668 sf
(5) 1 inch @ elevation 21.0 ft
Page 3 of 8

State Stormwater Management Systems
Permit No. SW7070213
II. SCHEDULE OF COMPLIANCE
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, 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.
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.
Page 4 of 8

State Stormwater.Management Systems.
Permit No. SW7070213
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.
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:. -Ill. 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.
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.
Page 5 of 8

State Stormwater Management Systems
Permit No. SW7070213
9. The permittee shall notify the Division any name, ownership or mailing address
changes within 30 days.
Permit issued this the 20th day of June, 2007.
NORTH I ROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
Coleen H. Sullins, Director
Division of Water Quality
By Authority of the Environmental Management Commission
Page 6 of 8

State Stormwater Management Systems .
Permit No. SW7070213
Craven County Judicial Center
Stormwater Permit No. SW7070213
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. SW7070213
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
Craven County Building Inspections

SF_'cv "-*VXQ 8/ %
OFFICE USE ONLY
Date Received
Fee Paid
Permit Number
- 30-U
0.2/
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This form may he photocopied for use as an orlginal
GENERAL INFORMATION
1. Applicants name (specify the name of the corporation, individual, etc. who owns the project):
2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
N'titow ALZil.hcD , CmA/rr Axie f&ox
3. Mailing Address for person listed in item 2 above:
City: /Vaw 8(rX41 State: /VG Zip: US60
Telephone Number: j LSZ ) 636-6600
4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
CR.aytfN Cortyk(- ca* ac
5. Location of Project (street address):
_10S0 CL-fX0 RJ
City: New Ame County: CRA1I9011
6. Directions to project (from nearest major intersection):
SouTH DN CL.sU3 R-PI F&A4 7'6g6-9feCTU1 or' US B? 40 CG�Kr�s RD. (SR llls).
AP.j'ok;LLTcaY 1 Nyc-n' W RZiie (WE.Ir -s me Lip 60)
7. Latitude: 3S*0 'S3?S'N Longitude: O�}eIDtS3.56�t%✓ of project
8. Contact person who can answer questions about the project:
Name: Lom DY3 W Telephone Number:. ( 331 ) 612 -0911
II. PERMIT INFORMATION:
1. Specify whether project is (check one): ✓ New Renewal Modification
Form SWU-101 Version 3.99 Pagel of4

2. If this application Is beingsubmitted ?� ,Ie result of a renewal or modification to an existingerm list the
existing permit number /v/H and its issue date (if knov p i
3. Specify the type of project (check one):
_Low Density _High Density _Redevelop General Permit Other
4. Additional Project Requirements (check applicable blanks):
_CAMA Major Sedimentation/Erosion Control _404/401 Permit [ANPDES Stormwater
Information on required state permits can be obtained by contacting the Customer Service Center at
1-877-623-6748.
III. PROJECT INFORMATION
1. 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.
2. Stormwater runoff from this project drains to the / rditfd (, &CNBU% ,/ AV0 River basin.
3. Total Project Area: 3.16 acresCaPLIMap) 4. Project Built Upon Area: S O• q 1_%
5. How many drainage areas does the project have? 3
6. Complete the following information for each drainage area. If there are more than two drainage areas in the
project, attach an additional sheet with the information for each area provided in the same format as below.
Basin Information
Drainage Area 1
Drainage Area 2
Receiving Stream Name
tr
feNOI CRC
Receiving Stream Class
C sW IVSI✓
(S NSlt/
Drainage Area
1. 9 AAL
f. 6$
Existing Impervious` Area
0
Proposed Impervious` Area
. I L
. 3
%Impervious" Area (total)
30
Impervious` Surface Area
Drainage Area 1
Drainage Area 2
On -site Buildings
D.061 A
t y AG
On -site Streets
. Ill ft
On -site Parking
0. S31
On -site Sidewalks
p, t p f A
L
Other on -site
0. g&
p
Off -site
0
Total: , t L Aa
Total: 1.3044,
` 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

2. this application is being submitted as the result of a renewal or modificatioZ
, list th
e Ling permit number and its issue d
3. Specify a type of project (check one):
_Low ity _High Density _Redevelop _GOther4. Additional Projectulrements (check applicable blanks):
_CAMA Major imentation/Erosion Control 404/401 Permwater
Information on required state p is can be obtained by contacting th ustomer Service Center at
1-877-623-6748.
III. PROJECT INFORMATION
1. In the space provided below, summarize howAment
ll be treated. Also attach a detailed narrative
(one to two pages) describing stormwater maeproject.
2. Stormwater runoff fro s project drains to the \drainage
3. Total Project acres 4. Project Built 5. How y drainage areas does the project have?
6. omplete the following information For each drainage area. If there are mor
project, attach an additional sheet with the information for each area provided in the same format as
In the
Basin Information
Drainage Area.
Drainage Paee 2�
Receiving Stream Name
13ACHROit
Receiving Stream Class
C SV Amy
Drainage Area
Existing Impervious' Area
i
Proposed Impervious'Area
5.3 Z A
%Impervious* Area (total)
76.7 S
Impervious' Surface Area
Drainage Area I
Drat ge 2
On -site Buildings
b -7 S F A
On -site Streets
On -site Parking
On -site Sidewalks
S S c-
Other on -site Fi fm Alk PAtt
I L S $ r L
Off -site
10
Total:
T 1:
Impervious area is defined as the built upon area Including, but not limited to, buildings, roads, parking areas,
sidewalks, gravel areas, etc.
lo�a� y np. DA3 23 1737
Form SVX-101 Version 3.99 Page 2 of
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7. How was the off -site impervious area listed above derived?_ //+
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 be
changed or deleted without the consent of the State.
2. No more than square feet of any lot shall be covered by structures or Impervious materials.
Impervious materials include asphalt, gravel, concrete, brick, stone, slate or similar material but do not Include wood
decking or the water surface of swimming pools.
3. Swales shall not be filled In, piped, or altered except as necessary to provide driveway crossings.
4. Built -upon area in excess of the permitted amount requires a state stormwater management permit modification prior to
construction.
5. All permitted runoff from outparcels or future development shall be directed into the permitted stormwater control
system. These connections to the stormwater control system shall be performed in a manner that maintains the Integrity
and performance of the system as permitted.
By your signature below, you certify that the recorded deed restrictions and protective covenants for this project
shall include all the applicable items required above, that the covenants will be binding on all parties and persons
claiming under them, that they will run with the land, that the required covenants cannot be changed or deleted
without concurrence from the State, and that they will be recorded prior to the sale of any lot.
V. SUPPLEMENT FORMS
The applicable state stormwater management permit supplement form(s) listed below must be submitted for each
BMP specified for this project. Contact the Stormwater and General Permits Unit at [phone] for the status
and availability of these forms.
t4`0rm 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
Form SWU-108
Underground Infiltration Trench Supplement
Neuse River Basin Supplement ^� of rtfr 4116146W
Form SWU-109
Innovative Best Management Practice Supplement
Form SWU-101 Version 3.99 Page 3 of 4

VI. SUBMITTAL REQUIREMENTS
Only complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ).
A complete package includes all of the items listed below. The complete application package should be
submitted to the appropriate DWQ Regional Office.
1. Please indicate that you have provided the following required information by initialing in the space provided
next to each item.
Initials
• Original and one copy of the Stormwater Management Permit Application Form ZVo
• One copy of the applicable Supplement Form(s) for each BMP ZVp
• Permit application processing fee of $420 (payable to NCDENR) 111/0
• Detailed narrative description of stormwater treatment/management 30
• Two copies of plans and specifications, including:
- Development/Project name
- Engineer and firm
-Legend
- North arrow
- Scale
- Revision number & date
- Mean high water line
- Dimensioned property/project boundary
- Location map with named streets or NCSR numbers
- Original contours, proposed contours, spot elevations, finished Floor elevations
- Details of roads, drainage features, collection systems, and stormwater control measures
- Wetlands delineated, or a note on plans that none exist
- Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations
- Drainage areas delineated
- Vegetated buffers (where required)
VII. AGENT AUTHORIZATION
If you wish to designate authority to another individual or firm so that they may provide information on your
behalf, please complete this section.
Designated agent (individual or firm): Timm iw LID Zosmy 9,13uw
Mailing Address: DbWL W. 1Yfn zr 4. ,.SUStct 136
City: WM l zT State: /M1 Zip: 7go?
Phone: ( 336 ) 66LIN11 Fax: ( 336 i-MIM
Vill. APPLICANT'S CERTIFICATION
I. (print or type name of person listed in General Information, Item 2) it 4900 &1: 614AD
certify that the information included on this permit application for the best of my knowledge, correct and
that the project will be constructed in conformance with the ap oved plans, that the required deed restrictions
and protective covenants will be recorded, and that the propo d project complies with the requirements of 15A
NCAC 2H .1000. nn A /
Date: 3 -2 5?-D -%
`-
' Form SWU=101 Version 3.99 Page 4 of 4
OlUI 1
��My Commission Expire i

J
Permit No. Stv7d 70-)-13
(to be provided by DWQ)
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
DWQ 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: GRAVU GOuArry .1001619L L `MITER
Contact Person: 1444ROLD SLIZZARD Phone Number: (Z3t) 636 -WO
For projects with multiple basins, specify which basin this worksheet applies to:
elevations
Basin Bottom Elevation 17.48 ft.
Permanent Pool Elevation Z1.00 ft.
Temporary Pool Elevation 21.40 ft.
(floor of the basin)
(elevation of the orifice)
(elevation of the discharge structure overflow)
areas
Permanent Pool Surface Area 14,374 sq. ft. (water surface area at the orifice elevation)
Drainage Area 7.70 ac. (on -site and off -site drainage to the basin)
Impervious Area r.32 ac. (on -site and off -site drainage to the basin)
volumes
Permanent Pool Volume 4g. l OZ cu. ft. (combined volume of main basin and forebay)
Temporary Pool Volume IT 974 cu. ft. (volume detained above the permanent pool)
Forebay Volume 4 434 cu. ft. (approximately 20% of total volume)
Other parameters
SA/DAI S.12 (surface area to drainage area ratio from DWQ table)
Diameter of Orifice V I in. (2 to 5 day temporary pool draw -down required)
Design Rainfall I in.
Design TSS Removal 2 7-5 % (minimum 85% required)
Form SWU-102 Rev 3.99 Page 1 of 4

Footnotes:
t When using the Division SA/DA tables, the correct SA/DA 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 BMP manual provides design tables for both 85% TSS removal and 90% TSS removal.
I1. 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
3:10 a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet).
TWO b. The forebay volume is approximately equal to 20% of the basin volume.
T W c. The temporary pool controls runoff from the design storm event.
TW d. The temporary pool draws down in 2 to 5 days.
4M e. If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow
calculations)
'JW f. The basin length to width ratio is greater than 3:1.
Y'W g. The basin side slopes above the permanent pool are no steeper than 3:1.
A?% h. A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail).
t 0 i. Vegetative cover above the permanent pool elevation is specified.
,741 j. A trash rack or similar device is provided for both the overflow and orifice.
'Y✓V k. A recorded drainage easement is provided for each basin including access to nearest right-
of-way.
/Y 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.
t�Vo 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 does 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:
1. 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. 18 feet in the main pond, the sediment shall be removed.
When the permanent pool depth reads 3. 33 feet in the forebay, the sediment shall be removed.
BASIN DIAGRAM
Ulf in the blanks)
Permanent Pool Elevation Z(•t�
Sediment Re:ovalEl.------------ -- Sediment Removal Elevation 75%Bottom on .SS %------------------------------/--�------- 25%
Bottom Elevation —
FOREBAY 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.
Form S WU-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: ywab &a a it.Jlto
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, a Notary Pu "c for the State of
County of do hereby certify that QJ1 Ah _
personally appeared before me this day of / kVb�� , 00-7anknowledge the due
execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal,
SEAL
My commission expire 09
Form SWU-102 Rev 3.99 Page 4 of 4

Permit No. 5 t r 1 U 7.0 a- 13
N be riaea by nwQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality ^EVE®
MIT STORMWATER MANAGEMENT PERAPPLICATION FOSS/lt�J
BIORETENTION BASIN SUPPLEMENT JUN 19 2007
This form may be photocopied for use as an original OW& V r7%' R0
DWO Stormwater Management Plan Review:
A complete stormwater management plan submittal includes a stormwater management permit application, a
bioretention area supplement for each proposed system, sealed design calculations, a detailed soils report and 2 sets
of plans and specifications showing all stormwater conveyances and system details.
L PROJECT INFORMATION
Project Name: CRAvU LovN7y 3vOrCtg6 CENTER
Contact Person: H41201 D 4OZZARD t ovurY motmx& ig Phone Number: 2s2 616-6600
For projects with multiple basins, specify which basin this worksheet applies to: 21Vn7tiurt04/ ARM ft I
(must match the DA # on the application & plans)
II. DESIGN INFORMATION Attach supporting calculations/documentation. Provide a written soils report
based on actual field investigations conducted by a qualified individual. The soils report should include
informational references to the County soils maps when available. All elevations shall be in feet mean sea level
(fmsl).
Soils Report Summary
In -Situ Soil Type t R S MD�lILTls1�
In -Situ Soil Infiltration Rate 0.6 in./hr. (the most restrictive soil layer)
SHWT Elevation Z I ft. (Seasonal High Water Table elevation)
Planting Soil Texture /VC oA'/O el%j' (must be a sandy loam, loamy sand, or loam texture)
Planting Soil Infiltration Rate Z in./hr.
Basin Design Parameters
Drainage Area
Impervious Area
Design Storm
Design Volume
Inlet Velocity
Drawdown Time
Basin Elevations
Temporary Pool Elevation
Planting Elevation
Bottom Elevation
Basin Dimensions
Basin Size
Basin Volume Provided
SWU-108 4.07
6 6, 6t17 sq.ft. (on -site and off -site drainage to the basin)
47,787 sq.ft. (on -site and off -site drainage to the basin)
1 „ inch (1.5 inch event for SA waters, l inch event for others)
3933 c.f. (storage volume required)
fps
s• 9 hours
Z y- 6D fmsl (elevation of the bypassloutlet structure)
L i • 00 fmsl (elevation of the ground surface bottom)
Z/s. Xf fmsl (elevation of the bottom of the planting media)
I
3106 ft. x -Z z 3 ft. = � 1Z sq. ft. (surface area at basin bottom)
T83 c.f.
Page 1 of 4

Basin Plantings
Number of plantings required VA stems (400 stems per acre of bioretention area is required at a minimum)
Total No. of plantings provided q L = Trees + Shrubs (at least I tree for every 3 shrubs)
This system (check one) does does not incorporate the use of an under -drain.
(Under -drains are not allowed for those projects that drain to class SA waters.)
III. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the North Carolina Stormwater Best Management Practice
Manual and Administrative Code Section: 15A NCAC 2H .1000. These requirements are subject to change in
accordance with the manual and rules.
Initial in the space provided to indicate that the following design requirements have been met and supporting
documentation is attached. If a requirement has not been met, attach written justiftcation. An incomplete
submittal package will result in a request for additional information and will substantially delay final review and
approval of the project.
Applicant's Initials
"1✓0 a. System is located 50 feet from class SA waters and 30 feet from other surface waters.
Tb. No vertical sand bed is proposed.
�i t10 c. The bioretention area is at least 15 feet wide by 40 feet long.
Z VD d. A grass buffer strip and sheet flow conditions are provided at the inlet.
e. Seasonal High Water table depth is at least 2 feet below the planting elevation surface.
f. Ponding depth of 6-12" is provided.
-TrV'�O g. In -situ soils have a minimum hydraulic conductivity of 0.52 inches per hour.
h. An in-depth soils report is provided. (report should include soil types, boring log, map,
suitability for placement of the control system, seasonal high water table, infiltration rate, etc.)
ZV O i. The planting soil has a minimum hydraulic conductivity of 0.52 inches per hour. The type and
��placement specifications of the planting media are noted on the plans.
�Y O j. The planting soil meets minimum soil specifications per the latest version of the NCDENR
Stormwater Best Management Practices Manual, including a low phosphorus content to
promote phosphorus removal. (P-Index of 20 to 40 is optimal.) Include a soils test, indicating
P-Index, from a certified lab for those projects draining to Nutrient Sensitive Waters.
VV k. System is designed to draw down the design storage volume to the proposed bottom elevation
under seasonal high water conditions within 24 hours. Draw down calculations are attached.
1. A detailed planting plan, prepared by a qualified individual, is provided on the plans. This plan
shall indicate a variety of suitable species, location, spacing, soil preparation, fertilizer
requirements, installation procedures, construction schedule, etc..
SWU-108 4.07
Page 2 of 4

UNy in. Type of mulch layer and depth is specified on the plans.
Z ✓0 n. Plan and section details for the bioretention area are provided. (including dimensions and
7 elevations)
tit/ o. Plan details for the inlet and outlet structures are provided. (including dimensions and
elevations)
p. All side slopes stabilized with vegetated cover are no steeper than 3:1 (H:V).
Zyu q. A benchmark is provided to determine the sediment accumulation in the basin area.
N/a r. Vegetated filter is provided for overflow and detail is shown on plans (Required minimum
length is 50 feet for SA waters, 30 feet for other waters).
yV0 s. Runoff in excess of the design volume bypasses off-line systems (bypass detail provided).
vn t. Plans ensure that the installed system will meet design specifications (constructed or restored)
upon initial operation once the project is complete and the entire drainage area is stabilized.
IV. BIORETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
Records of maintenance items to include dates, inspector's name, type of maintenance, etc. shall be kept and made
available to Division staff upon request. Maintenance activities shall be performed as follows:
1. Inspect the bioretention area system for soil and mulch erosion, vegetated cover, and general condition after
every significant runoff producing rainfall event and at least monthly. Remove trash as needed.
2. Repair eroded areas immediately, re -seed, re -plant, and re -mulch as necessary to maintain good vegetative and
mulch cover.
3. Remove accumulated sediment as needed to maintain good infiltration. When the filtering capacity diminishes
substantially (e.g., when water ponds on the surface for more than 24 hours), the top few inches of material must
be removed and replaced with fresh planting soil material. Regardless of infiltration capacity, accumulated
sediment in the bioretention basin shall be removed when the depth is reduced to 75% of the original design
depth. The system shall be restored to the original design depth without over -excavating. Over -excavating may
cause the required water table separation to be reduced and may compromise the ability of the system to perform
as designed. Removed sediment shall be disposed of in an appropriate manner and shall not be handled in a
manner that will adversely impact water quality (i.e. stockpiling near a stormwater treatment device or stream,
etc.).
4. Replace, or add additional mulch as needed. Removal of the old mulch layer before applying the new layer is
recommended every 2 to 3 years.
5. Prune trees and shrubs and remove debris on an annual basis. Grassed vegetation should not exceed 6 inches in
height.
6. Treat all diseased trees and shrubs whenever needed. Remove and replace all dead and diseased vegetation
considered beyond treatment every 6 months.
7. Replace support stakes yearly (in the spring). Replace deficient stakes or wires whenever needed
SWU-108 4.07
Page 3 of 4

8. Soil testing shall be conducted annually to determine pH and any accumulation of toxins in the planting media.
Lime or other alkaline substances shall be applied as recommended per the soil test and toxic soils shall be
removed, disposed of properly and replaced with new planting media.
9. All components of the bioretention area system shall be maintained in good working order.
10. If the Division determines that the system is failing, the system will immediately be repaired to original design
specifications. If the system cannot be repaired to perform its design function, other stormwater control devices
as allowed by NCAC 2H .1000 must be designed, approved and constructed.
I acknowledge and agree by my signature below that I am responsible for the performance of the ten 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:
Title:
Addre
Phone
Signal
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 has1 been named the president.
a Notary Public for the State of6Z l C�L2%L6�1%GL%
County of do hereby certify that
personally appeared before me this day of �i//YI.2 o-,�, and acknowledge the
due execution of the forgoing bioretention basin maintenance requirements. Witness my hand and official seal,
Notary Public
Craven County
My Commission explri
11/18/2008
'2o!TH CARC�\P
SEAL
My commission expires
SWU-108 4.07
Page 4 of 4

Permit No.
(to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
BIORETENTION BASIN SUPPLEMENT
This form may be photocopied for use as an original.
DWO Stormwater Management Plan Review:
A complete storrrtwater management plan submittal includes a stormwater management permit application, a
bioretention area supplement for each proposed system, sealed design calculations, a detailed soils report and 2 sets
of plans and specifications showing all stormwater conveyances and system details.
I. PROJECT INFORMATION
Project Name: GRAVEM Qu"TV JOICiAG CEatr6R
Contact Person: HAROLD BLM%ARn, cav4qY J44N96M Phone Number: ( 297) 676-6400
For projects with multiple basins, specify which basin this worksheet applies to: YIORE'rEerrrou AREA $2
(must match the DA # on the application & plans)
H. DESIGN INFORMATION Attach supporting calculations/documentation. Provide a written soils report
based on actual field investigations conducted by a qualified individual. The soils report should include
informational references to the County soils maps when available. All elevations shall be in feet mean sea level
(fmsi).
Soils Report Summary
In -Situ Soil Type C 1,9 Yj IS70f S4*D
In -Situ Soil Infiltration Rate Clio mJhr. (the most restrictive .mil layer)
SHWT Elevation 71 ft. (Seasonal High Water Table elevation)
Planting Soil Texture 'Ve BM i /- (must be a sandy loam, loamy sand, or loam texture)
Planting Soil Infiltration Rate Z in./hr.
Basin Design Parameters
Drainage Area
71.87q sq.ft. (on -site and off -site drainage to the basin)
Impervious Area
4-6/ 62Y sq.ft. (on -site and of -site drainage to the basin)
Design Storm
l ° inch (1.5 inch event for SA waters, I inch event for others)
Design Volume
yS y c.f. (storage volume required)
Inlet Velocity
fps
Drawdown Time
S.6 hours
Basin Elevations
Temporary Pool Elevation
L .00 fmsl (elevation of the bypass/outlet structure)
Planting Elevation
L3. t70 fmsl (elevation of the ground surface bottom)
Bottom Elevation
Z-o • ?,S fmsl (elevation of the bottom of the planting media)
Basin Dimensions z
Basin Size � �� ft x " Z / fL =319 1.3 9 sq. ft. (surface area at basin bottom)
Basin Volume Provided c.£ /
SWU-108 4.07
Page 1 of 4

Basin Plantings
Number of plantings required 3•'Z stems (400 stems per acre of bioretention area is required at a minimum)
Total No. of plantings provided /c g = Trees 30 + Shrubs_ (at Least I tree for every 3 shrubs)
This system (check one) does does not incorporate the use of an under -drain.
(Under -drains are not allowed for those projects that drain to class SA waters.)
III. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the North Carolina Stormwater Best Management Practice
Manual and Administrative Code Section: 15A NCAC 2H .1000. These requirements are subject to change in
accordance with the manual and rules.
Initial in the space provided to indicate that the following design requirements have been met and supporting
documentation is attached. If a requirement has not been met; attach written justtficatian. An incomplete
submittal package will result in a request for additional information and will substantially delay final review and
approval of the project.
Applicant's Initials
yw a. System is located 50 feet from class SA waters and 30 feet from other surface waters.
b. No vertical sand bed is proposed.
c. The bioretention area is at least 15 feet wide by 40 feet long.
d. A grass buffer strip and sheet flow conditions are provided at the inlet.
e. Seasonal High Water table depth is at least 2 feet below the planting elevation surface.
f. Ponding depth of 6-12" is provided. w
g. In -situ soils have a minimum hydraulic conductivity of 0.52 inches per hour.
1 V U h. An in-depth soils report is provided. (report should include soil types, boring log, map,
suitability for placement of the control system, seasonal high water table, infiltration rate, etc.)
i. The planting soil has a minimum hydraulic conductivity of 0.52 inches per hour. The type and
placement specifications of the planting media are noted on the plans.
(L j. The planting soil meets minimum soil specifications per the latest version of the NCDENR
Stormwater Best Management Practices Manual, including a low phosphorus content to
promote phosphorus removal. (P-Index of 20 to 40 is optimal.) Include a soils test, indicating
7� P-Index, from a certified lab for those projects draining to Nutrient Sensitive Waters.
k. System is designed to draw down the design storage volume to the proposed bottom elevation
under seasonal high water conditions within 24 hours. Draw down calculations are attached.
1. A detailed planting plan, prepared by a qualified individual, is provided on the plans. This plan
shall indicate a variety of suitable species, location, spacing, soil preparation, fertilizer
requirements, installation procedures, construction schedule, etc..
SWU-108 4.07
Page 2 of 4

Win. Type of mulch layer and depth is specified on the plans.
n. Plan and section details for the bioretention area are provided. (including dimensions and
elevations)
Vo. Plan details for the inlet and outlet structures are provided. (including dimensions and
elevations)
iyD p. All side slopes stabilized with vegetated cover are no steeper than 3:1 (H:V).
�LIP q. A benchmark is provided to determine the sediment accumulation in the basin area.
r. Vegetated filter is provided for overflow and detail is shown on plans (Required minimum
length is 50 feet for SA waters, 30 feet for other waters).
.try s. Runoff in excess of the design volume bypasses off-line systems (bypass detail provided).
W v V t. Plans ensure that the installed system will meet design specifications (constructed or restored)
upon initial operation once the project is complete and the entire drainage area is stabilized.
IV. BIORETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
Records of maintenance items to include dates, inspector's name, type of maintenance, etc. shall be kept and made
available to Division staff upon request. Maintenance activities shall be performed as follows:
1. Inspect the bioretention area system for soil and mulch erosion, vegetated cover, and general condition after
every significant runoff producing rainfall event and at least monthly. Remove trash as needed.
2. Repair eroded areas immediately, re -seed, re -plant, and re -mulch as necessary to maintain good vegetative and
mulch cover.
3. Remove accumulated sediment as needed to maintain good infiltration. When the filtering capacity diminishes
substantially (e.g., when water ponds on the surface for more than 24 hours), the top few inches of material must
be removed and replaced with fresh planting soil material. Regardless of infiltration capacity, accumulated
sediment in the bioretention basin shall be removed when the depth is reduced to 75% of the original design
depth. The system shall be restored to the original design depth without over -excavating. Over -excavating may
cause the required water table separation to be reduced and may compromise the ability of the system to perform
as designed. Removed sediment shall be disposed of in an appropriate manner and shall not be handled in a
manner that will adversely impact water quality (i.e. stockpiling near a stormwater treatment device or stream,
etc.).
4. Replace, or add additional mulch as needed. Removal of the old mulch layer before applying the new layer is
recommended every 2 to 3 years.
5. Prune trees and shrubs and remove debris on an annual basis. Grassed vegetation should not exceed 6 inches in
height.
6. Treat all diseased trees and shrubs whenever needed. Remove and replace all dead and diseased vegetation
considered beyond treatment every 6 months.
7. Replace support stakes yearly (in the spring). Replace deficient stakes or wires whenever needed
SWU-108 4.07
Page 3 of 4

8. Soil testing shall be conducted annually to determine pH and any accumulation of toxins in the planting media
Lime or other alkaline substances shall be applied as recommended per the soil test and toxic soils shall be
removed, disposed of properly and replaced with new planting media.
9. All components of the bioretention area system shall be maintained in good working order
10. If the Division determines that the system is failing, the system will immediately be repaired to original design
specifications. If the system cannot be repaired to perform its design function, other stormwater control devices
as allowed by NCAC 2H A000 must be designed, approved and constructed.
I acknowledge and agree by my signature below that I am responsible for the performance of the ten maintenance
procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the
system or resuonsible party.
Print I
Title:
Addre
Phone
Signal
Date:
Note: The legally responsible parry should not be a homeowners association unless more than 50% of the lots have been sold and a
resident of the sub�diiviaion has bee uamed the president /}') ,, l/
I,( L�,, (il . �a Notary Public for the State of / / i9 & �QJ
County of /U/mil t0/Yti do hereby certify that
personally appeared before me this ly—sZ-O(day of QQ and acknowledge the
due execution of the forgoing bioretention basin maintenance requirements. Witness my hand and official seal,
`\\ A AItory ,
F '
Crove, Public
My commis, on ntv =
2 11/18/200B XPlres�
h, CA
111110
SEAL
My commission expires
4��O d' hA��7r
SWLT-108 4.07
Page 4 of 4

LEVEL SPREADER SYSTEM OPERATION AND MAINTENANCE AGREEMENT (1/2007)
A level spreader system includes: a forebay, diverter box, level spreader, riparian buffer/vegetated filter strip,
and flow bypass channel.
Name of Project: C2AV6;W CoU.✓7Y Z oZ(IAL, Ctwrm
Address: 10SO CLADS 1ZA
Maintenance activities shall be performed as follows:
MAINTENANCE ACTIVITY
FREQUENCY
Post -construction monitoring —inspect for vegetation,
Check after every heavy rainfall for first 6 months
settling,erosion, or concentrated flow.
following construction.
Inspect Diverter Box and clean and/or make repairs.
Once a month and after heavy rainfalls/storms.
Look for:
• Clogged inlet or outlet pipes.
• Trash/debris in the box.
Inspect Forebay + Level Spreader. Clean and/or
Once a month and after heavy rainfalls/stones.
make repairs. Look for:
• Sediment in forebay and along level spreader
lip;
• Trash and/or leaf buildup.
• Scour, undercutting of level spreader.
• Settlement of level spreader structure (no
longer level; you see silt downhill below level .
spreader).
• Fallen trees on level spreader.
• #57 stone washing downhill.
Inspect the Riparian Buffer and the Bypass Swale
Once a month and after heavy rainfalls/storms.
and make repairs as needed'. Look for:
• Damaged turf reinforcement or riprap rolling
downhill.
• Erosion within the buffer or Swale.
• Concentrated flows downhill of level
spreader —look for gullies or sediment flows.
Mow grass to a 6" height.
As needed during growing season.
Remove any weeds/shrubs growing on level spreader
Once a year.
or in swale.
1 NOTE: Contact NC Division of Water Quality, 401/Wetiands Unit at 919-733-1786 BEFORE any work
in Protected Riparian Buffers.
Page 1 of 2

LEVEL
SPREADER NO.
LOCATION ON SITE (DESCRIBE)
HOW WILL IT BE ACCESSED?
1
WCSTW 0116 aP SZTG
avaKt441D F Of1 i vaL &CO.'
2
3
4
5
6
I acknowledge and agree by my signature below that 1 am responsible for the performance of the 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: n+"L45 BLTITMti)
An/
(zs
Z
Note: The legally responsible party should not be a homeowners association unless more than 50% of the
lots have been sold gind a resident of the subdivision has been named the president.
a Notary Public for the State of / C a�/ti'v '
County of [ / i do hereby certify that ,,Ok24c�
personally appeared before me this 115-ckday of LIiYt2 c2Z 7 , and acknowledge the due
execution of the forgoing wet [wetland] detention basin maintenance requirements. Witness my hand and
official seal,
AA.
CNotory Pub BC 4.
My c
I lss on a P/r6
2 l �l8/2008
CA R O�'\��`��\
SEAL
� Q
My commission expires / /O -ZLI) 0
Page 2 of 2