HomeMy WebLinkAboutSW7061230_CURRENT PERMIT_20071031STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
DOC TYPE
CURRENT PERMIT
APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
YYYYMMDD
Y
aorRO
Michael F. Easley, Govem
i
7
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
-i
Coleen H. Sullins, Director
Division of Water Quality
October 31. 2007
Patrick McCullough
P.O. Box 778
Havelock, NC 28532
Subject: Permit No. SW7061230 Modification
Craeberne Forest — A Planned Unit Development
High Density Stormwater Project
Craven County
Dear Mr. McCullough:
The Washington Regional Office received a completed Stormwater Application for the subject project on July
11, 2007. Staff review of the plans and specifications has determined that the project, as proposed, will comply with
the Stormwater Regulations set forth in Tide 15A NCAC 2H.1000. We are forwarding Permit No. SW7061230 dated
October 31, 2007 to Patrick McCullough for four interconnected wet detention ponds to serve the Craeberne Forest —
A Planned Unit Development located at the end of Trent Creek Road in New Bern, North Carolina.
This permit shall be effective from the date of issuance until October 31, 2017, shall void Permit No.
SW7060612 dated February 1, 2007 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. The issuance of this permit does not resolve any previous violations of the stormwater rules for
construction without a permit.
If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to
request an adjudicatory hearing upon written request within thirty (30) days following receipt of this permit. This
request must be in the form of a written petition, conforming to Chapter 150E of the North Carolina General Statutes,
and filed with the Office of Administrative Hearings, 6714 Mail Service Center, Raleigh, NC 27699-6714. 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 (252) 946-6481.
ncere(y,�
7a7Yiodge, Reglon upervisor
Surface Water Protection Section
Washington Regional Office
AH/sd: J:\WPDATA\WQS\ State SW-SD\Permits— Wet Pond
cc: Joseph Avolis, PE, Avolis Engineering, PA
C en County Building Inspections Department
ashington Regional Office
Central Files
North Carolina Division of Water Quality Internet: �c�c�r.nanrtcnnmlitc t rs
943 Washington Square Mall Phone (252) 946-6481
Washington, NC 27889 Fax (252) 946-9215
NonrthCarolina
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An Equal Opportunity/Affirmative Action Employer - 50% Recycled/l0% Post Consumer Paper
State Stormwater Management Systems Permit No. SW7061230
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
Patrick McCullough
Craeberne Forest — A Planned Unit Development
FOR THE
construction, operation and maintenance of stormwater management systems in compliance with the provisions of
15A NCAC 21-1.1000 (hereafter referred to as the "stormwater rules'l and the approved stormwater management
plans and specifications and other supporting data as attached and on file with and approved by the Division of Water
Quality and considered a part of this permit for four interconnected wet detention ponds to serve the Craeberne
Forest — A Planned Unit Development located at the end of Trent Creek Road in New Bern, North Carolina.
This permit shall be effective from the date of issuance until October 31, 2017 and shall be subject to the following
specked conditions and limitations:
DESIGN STANDARDS i
1. This permit is effective only with respect to the nature and volume of stormwater described in the application
and other supporting data.
2. This stormwater system has been approved for the management of stormwater runoff as described on page
3 of this permit, the Project Data Sheet.
3. A maximum of 26.12 acres of built upon area is allowed on this 130.13 acre site.
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 approved plans.
5. Approved plans and specifications for this project are incorporated by reference and are enforceable parts of
the permit.
u.
DIVISION OF WATER QUALITY
WET PONDS - PROJECT DATA
Project Name:
Craebeme Forest —A Planned Unit Development
Permit Number:
SW7061230 Modification
Location:
Craven County .
Applicant:
Patrick McCullough
Mailing Address:
P.O. Box 778
Havelock, NC 28532
Application Date:
July 11, 2007
Receiving Stream:
UT to Wilson Creek and Hayward Creek
Classification of Water Body:
C; SW, NSW
Total Site Area:
130.13 ac
Drainage area:
94.12 ac
Total Impervious allowed on site:
26.12 ac. (see note)
Wet Pond Depth:
4.0 ft
Required Storage Volume:
166,425 cf
Provided Storage Volume:
110,000 cf - for last wet pond in series
226,215 cf — for all four wet ponds
Required Surface Area:
101,677 sf
Provided Surface Area:
141,855 sf — for last wet pond in series
270,359 sf — for all four wet ponds
Controlling Orifice:
1.2' weir @ el. of 24.2'
Note: Lot Numbers 1-162 and 197-274, the maximum built -upon area is 2,160 square feet;
Lot Numbers 163-196, the maximum built -upon area is 3,108 square feet.
6. No homeowner/lot owner/developer shall be allowed to fill in, alter, or pipe any vegetative practices (such as
swales) shown on the approved plans as part of the stormwater management system without submitting a
revision to the permit and receiving approval from the Division.
The following items will require a modification to the permit:
a. Any revision to the approved plans, regardless of size
b. Project name change
C. Transfer of ownership
d. Redesign or addition to the approved amount of built -upon area
e. Further subdivision of the project area.
In addition, the Director may determine that other revisions to the project should require a modification to the
permit.
B. 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.
SCHEDULE OF COMPLIANCE
The permittee will comply with the following schedule for construction and maintenance of the stormwater
management system.
a. The stormwater management system shall be constructed in its entirety, vegetated and operational
for its intended use prior to the construction of any built -upon surfaces except roads.
b. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be
repaired immediately.
2. The facilities must be properly maintained and operated at all times. The approved Operation and
Maintenance Plan must be followed in its entirety and maintenance must occur at the scheduled intervals.
3. The permittee shall at all times provide the operation and maintenance necessary to assure the permitted
stormwater system functions at optimum efficiency including, but not limited to:
a. Semiannual scheduled inspections (every 6 months)
b. Sediment removal
C. Mowing and revegetation of side slopes
d. Immediate repair of eroded areas
e. Maintenance of side slopes in accordance with approved plans and specifications
f. Debris removal and unclogging of outlet structure, orifice device and catch basins and piping.
4. Records of maintenance activities must be kept and made available upon request to authorized personnel of
DWQ. The records will indicate the date, activity, name of person performing the work and what actions were
taken.
5. This permit shall become voidable unless the facilities are constructed in accordance with the conditions of
this permit, the approved plans and specifications, and other supporting data.
6. Upon completion of construction and prior to operation of this permitted facility, a certification must be
received from an appropriate designer for the system installed certifying that the permitted facility has been
installed in accordance with this permit, the approved plans and specifications, and other supporting
documentation. Mail the Certification to the Washington Regional Office, 943 Washington Square Mall,
Washington, North Carolina, 27889, attention Division of Water Quality.
A copy of the approved plans and specifications shall be maintained on file by the Permittee for a minimum of
five years from the date of the completion of construction.
8. Deed restrictions are incorporated into this permit by reference and must be recorded with the Office of
the Register of Deeds prior to the sale of any lot.
Recorded deed restrictions must include, at a minimum, the following statements related to
stormwater management:
a. The following covenants are intended to ensure ongoing compliance with State Stormwater
Management Permit Number SW7061230, as issued by the Division of Water Quality under
NCAC 2H.1000.
b. The State of North Carolina is made a beneficiary of these covenants to the extent necessary to
maintain compliance with the Stormwater Management Permit.
C. These covenants are to run with the land and be binding on all persons and parties claiming
under them.
d. The covenants pertaining to stormwater may not be altered or rescinded without the express
written consent of the State of North Carolina, Division of Water Quality.
e. Alteration of the drainage as shown on the approved plans may not take place without the
concurrence of the Division of Water Quality.
f. The maximum built -upon area for Lot Numbers 1-162 and 197-274 is 2,160 square feet and for
Lot Numbers 163-196 is 3,108 square feet. This allotted amount includes any built -upon area
constructed within the lot property boundaries, and that portion of the right-of-way between the
front lot line and the edge of the pavement. Built upon area includes, but is not limited to,
structures, asphalt, concrete, gravel, brick, stone, slate, coquina, driveways, and parking areas,
but does not include raised, open wood decking, or the water surface of swimming pools.
g. Filling in, piping or altering any 3:1 vegetated conveyances (ditches, swales, etc.) associated with
the development except for average driveway crossings, is prohibited by any persons.
h. Filling in, piping or altering any vegetated area associated with the development is prohibited by
any persons.
i. A 50' vegetated buffer must be maintained between all built -upon area and the Mean High Water
line of surface waters.
All roof drains shall terminate at least 50' from the Mean High Water
mark.
10, The permittee must submit a copy of the recorded deed restrictions within 30 days of the date of
recording.
III. GENERAL CONDITIONS
This permit is not transferable. In the event there is a desire for the facilities to change ownership, or there is
a name change of the Permittee, a formal permit request must be submitted to the Division of Water Quality
accompanied by an application fee, documentation from the parties involved, and other supporting materials
as may be appropriate. The approval of this request will be considered on its merits and may or may not be
approved.
2. Failure to abide by the conditions and limitations contained in this permit may subject the Pefmittee to
enforcement action by the Division of Water Quality, in accordance with North Carolina General Statute 143-
215.6(a) to 143-215.6(c).
3. The issuance of this permit does not preclude the Perrnittee from complying with any and all statutes, rules,
regulations, or ordinances which may be imposed by other government agencies (local, state, and federal)
which have jurisdiction.
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 stornwater management systems.
5. The permit may be modified, revoked and reissued or terminated for cause. The filing of a request for a
permit modification, revocation and reissuance or termination does not stay any permit condition.
6. The Permittee,at least six (6) months prior to the expiration of this permit, shall submit in writing a request for
an extension along with appropriate application fee.
Permit issued this the thirty-first day of October, 2007.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT
forColeen H. Sullins, Director
Division of Water Quality
By Authority of the Environmental Management Commission
Permit Number SW7061230
Patrick McCullough — Craeberne Forest — A Planned Unit Development
Stormwater Permit No. SW7061230 Modification
Designer's Certification
I,
as a duly
Registered Professional Engineer in the State of North Carolina, having been authorized' to observe
(periodically/weekly/full time)
the construction of the project, _
for
(Project)
(Project Owner)
hereby state that to the best of my abilities, duecare and diligence was used in the observation of the project
construction such that the construction was observed to be built within substantial compliance and intent of the
approved plans and specifications.
Signature
Registration Number
Date
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.
f2
t''-'` '''--'' OFFICE USE ONLY
Date Received
Fee Paid
Permit Number
JUL 1
1 2007
0
t!!V1JJ �_,. State of North Carolina 'VVAC K �A-0 /
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This form may be photocopied for use as an original
I. GENERAL INFORMATION
1. Applicants name (specify the name of the corporation, individual, etc. who owns the project):
Patrick McCullough
2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
Patrick McCullough, Owner
3. Mailing Address for person listed in item 2 above:
P.O. Box.778
City: Havelock State: NC Zip: 28532
Telephone Number:
4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
Craeberne Forest — A Planned Unit Development
5. Location of Project (street address):
Trent Creek Road
City: New Bern County: Craven
6. Directions to project (from nearest major intersection):
US 17 South to Trent Creek Road across from
to end of Trent Creek Road, project on left.
7. Latitude: N35°-6.241 t Longitude: 1r1770-8.181
school
8. Contact person who can answer questions about the project:
Name: Joseph C. Avolis, P.E. Telephone Number: ( 252
II. PERMIT INFORMATION:
1. Specify whether project is (check one): New Renewal
Form SWU-101 Version3.99 Page I of
of project
X Modification
2. If this application is being su. .,ted as the result of a renewal or modificatiu.- ,o an existing permit, list the
existing permit number SW7061230 and its issue date (if known) February 1 , 2007
3. Specify the type of project (check one):
- ' Low Density X High Density _Redevelop _General Permit _Other
4. Additional Project Requirements (check applicable blanks):
_CAMA Major X Sedimentation/Erosion Control 404/401 Permit NPDES 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 .
Stormwater runoff will be treated in a series of five interconnected lakes
with one outlet device.
2. Stormwater runoff from this project drains to the
3. Total Project Area: 130.13 acres
5. How many drainage areas does the project have? 2
Neuse
River basin.
4. Project Built Upon Area: 20.1 %
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
UT to Wilson Creek
to
tyward Creek
Receiving Stream Class
C• Sw, NSW
C• Sw, NSW
Drainage Area
4,099,867 SF (94.12 AC)
36.01 AC
Existing Impervious* Area
0 SF
0 SF
Proposed Impervious"Area
1 , 137 , 600 SF 06141
0 SF
%Impervious Area (total)
27.8 % 1 e-4-
1 0
Impervious" Surface Area
Drainage Area 1
Drainage Area 2
On -site Buildings
510 640 SF
0 SF
On -site Streets
384 660 SF
0 SF
On -site j Drives
150,540 SF
0 SF
On -site Sidewalks
81,760 SF
0 SF
Other on -site
0 SF
0 SF
Off -site
0 SF
0 SF
Total: 1,137,600 SF
Total: 0 SF
Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas,
sidewalks, gravel areas, etc.
Drainage Area 2 = Undeveloped western side of property (wetlands).
Does not flow to lakes.
Form SWU-101 Version 3.99 Page 2 of 4
How was the off -site impervious area listed above derived?
Site visit and topographic survey
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 thartSee Attachaertt 1 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.
1+�Ys)994au13000To] NSM
The applicable state stormwater management permit supplement form(s) listed below must be submitted for each
BMP specified for this project. Contact the Stormwater and General Permits Unit at (919) 733-5083 for the status
and availability of these forms.
Form SWU-102
Wet Detention Basin Supplement
Form SWU-103
Infiltration Basin Supplement
Form SWU-104
Low Density Supplement
Form SWU-105
Curb Outlet System Supplement
Form SWU-106
Off -Site System Supplement
Form SWU-107
Underground Infiltration Trench Supplement
Form SWU-108
Neuse River Basin Supplement
Form SWU-109
Innovative Best Management Practice Supplement
Form SWU-101 Version 3.99 Page 3 of
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.
Please indicate that you have provided the following required information by initialing in the space provided
next to each item.
• Original and one copy of the Stormwater Management Permit Application Form
• One copy of the applicable Supplement Form(s) for each BMP
• Permit application processing fee of $420 (payable to NCDENR)
• Detailed narrative description of stormwater treatment/management
• Two copies of plans and specifications, including:
- Development/Project name
- Engineer and firm
-Legend
- North arrow
- Scale
- Revision number & date
- Mean high water line
- Dimensioned property/project boundary
- Location map with named streets or NCSR numbers
- Original contours, proposed contours, spot elevations, finished floor elevations
- Details of roads, drainage features, collection systems, and stormwater control measures
- Wetlands delineated, or a note on plans that none exist
- Existing drainage (including off -site), drainage 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): Avolis Engineering, PA
Mailing Address: PO Box 15564
City: New Bern
Phone: ( 252 ) 633-0068
VIII. APPLICANT'S CERTIFICATION
State: NC
zip: 28561
Fax: ( 252 ) 633-6507
1, (print or type name of person listed in General Information, item 2) Patrick McCullough
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.A
Pt
Patrick McCullough, Owner
FormSWU-101 Version3.99 Page 4of4
Date:
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
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: Craeberne Forest — A Planned Unit Development
Contact Person: Joseph C. Avolis, PE Phone Number: (252 ) 633-0068
For projects with multiple basins, specify which basin this worksheet applies to: One Pasin
elevations
Basin Bottom Elevation 19.8' ft. (floor of the basin)
Permanent Pool Elevation 24.2 ft. (elevation of the orifice)
Temporary Pool Elevation 24.8 ft. (elevation of the discharge structure overflow)
areas
Permanent Pool Surface Area 270,359 sq. ft. (water surface area at the orifice elevation)
Drainage Area 94.12 ac. (on -site and off -site drainage to the basin)
Impervious Area 26.12 ac. (on -site and off -site drainage to the basin)
volumes
Permanent Pool Volume 834,072 cu. ft. (combined volume of main basin and forebay)
Temporary Pool Volume 166,425 cu. ft. (volume detained above the permanent pool)
Forebay Volume 1502133 cu. ft. (approximately 20% of total volume)
Other parameters
SA/DA1
Diameter of Orifice
Design Rainfall
Design TSS Removal 2
z.48%
1.2 FT Weir in.
1 in.
90 %
(surface area to drainage area ratio from DWQ table)
(2 to 5 day temporary pool draw -down required)
(minimum 85% required)
Form SWU-102 Rev 3.99 Page I of 4
Footnotes'.
I 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.
II. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Stormwatcr Best Management Practices Manual
(N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code
Section: 15 A NCAC 2H .1008.
Initial in the space provided to indicate the following design requirements have been met and supporting
documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit
Application Form, the agent may initial below. If a requirement has not been met, attach justification.
Applicants Initials
a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet).
b. The forebay volume is approximately equal to 20% of the basin volume.
c. The temporary pool controls runoff from the design storm event.
d. The temporary pool draws down in 2 to 5 days.
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 less (show detail).
i. Vegetative cover above the permanent pool elevation is specified.
j. A trash rack or similar device is provided for both the overflow and orifice.
k. A recorded drainage easement is provided for each basin including access to nearest right-
of-way.
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.
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) I5 0 does not incorporate a vegetated filter at the outlet.
This system (check one) 0 does not incorporate pretreatment other than a forebay.
Form SWU-102 Rev 3.99 Page 2 of
Maintenance activities shall be performed as follows:
After every significant runoff producing rainfall event and at least monthly:
a. Inspect the wet detention basin system for sediment accumulation, erosion, trash accumulation,
vegetated cover, and general condition.
b. Check and clear the orifice of any obstructions such that drawdown of the temporary pool occurs within
2 to 5 days as designed.
2. Repair eroded areas immediately, re -seed as necessary to maintain good vegetative cover, mow vegetative
cover to maintain a maximum height of six inches, and remove trash as needed.
3. Inspect and repair the collection system (i.e. catch basins, piping, 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 3.2 feet in the main pond, the sediment shall be removed.
When the permanent pool depth reads 3.2 feet in the forebay, the sediment shall be removed.
BASIN DIAGRAM
(fill in the blanks)
Permanent Pool Elevation 24.2
Sediment Re oval El. 210 75 ° 21.0
-��---- - Sediment Removal Elevation 75 /o -- -- °
Bottom Ele ation % ---------------------------------------------
Bottom Elevation t 25%
Ie�3�a�
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 SWU-102 Rev 3.99 Page 3 of 4
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: Patrick McCullough
Title: Land Owner/Developer
Address: P.O. Box 778, Havelock, NC 28532
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, Beth Simmons , a Notary Public for the State of North Carolina
County of Craven
do hereby certify that Patrick McCullough
personally appeared before me this LQ day of 200' , and acknowledge the due
execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal,
SEAL
My commission expires April 22, 2009
Form SWU-102 Rev 3.99 Page 4 of 4
Permit No.
(to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water rr f
G t_5'- �u iJ ._D
Quality Y
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
DEC 2 12006
LOW DENSITY SUPPLEMENT
This form may be photocopied for use as an original DWQ-WAR®
A low density project is one that meets the appropriate criteria for built upon area and transports stormwater
runoff primarily through vegetated conveyances. Low density projects should not have a discrete stormwater
collection system as defined by 15A NCAC 2H .1002(18). Low density requirements and density factors can be
found in 15A NCAC 2H .1005 through .1007.
I. PROJECT INFORMATION
Project Name : Craeberne Forest Subdivision
Contact Person: Joseph C. Avolis, P.E. Phone Number: ( 252 ) 633-0068
Number of Lots: —0—
Allowable Built Upon Area Per Lot*:=0—
*If lot sizes are not uniform, attach a table indicating the number of lots, lot sizes and allowable built upon area
for each lot. The attachment must include the project name, phase, page numbers and provide area subtotals
and totals.
11. BUILT UPON AREA
See the Stormwater Management Permit Application for specific language that must be recorded in the deed
restrictions for all subdivisions.
For uniform lot sizes, complete the following calculation in the space provided below where:
• SA Site Area - the total project area above Mean High Water. Wetlands may be excluded when the
development results in high density pockets.
• DF Density Factor - the appropriate percent built upon area divided by 100.
• RA Road Area - the total impervious surface occupied by roadways.
• OA Other Area - the total area of impervious surfaces such as clubhouses, tennis courts, sidewalks, etc.
• No. Lots - the total number of lots in the subdivision.
• BUA/Lot - the computed allowable built upon area for each lot including driveways and impervious
surfaces located between the front lot line and the edge of pavement.
Form SWU-104 Rev 3.99 Page I of 2
(SA x DF) - RA - OA = BUA
No. Lots Lot
Calculation:
Project is for land clearing of roadways and future detention pond areas
only. Work does not involve any impervious surfaces at this time. A
future permit will be submitted to cover future development. This initial
permit would allow the work to progress while the design elevations
and utilities are being developed.
I11. REQUIRED ITEMS CHECKLIST
Initial in the space provided to indicate that the following requirements have been met and supporting
documentation is provided as necessary. If the applicant has designated an agent on the Stormwater
Management Permit Application Form, the agent may initial below.
Applica is Initials
LA 1/1
a. A 30 foot vegetative buffer is provided adjacent to surface waters. Projects in the Neuse
River basin may require additional buffers.
b. Deed restriction language as required on form SWU-101 shall be recorded as a restrictive
covenant. A copy of the recorded document shall be provided to DWQ within 30 days of
platting and prior to sale of any lots.
uilt upon area calculations are provided for the overall project and all lots.
_ d. Project conforms to low density requirements within the ORW AEC (if applicable).
[ 15A NCAC 2H .1007(2)(b)]
Form SWU-104 Rev3.99
Page 2 of 2