SW8970144_CURRENT PERMIT_19970326

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO. SW .p'/ 7Dl
DOC TYPE c- CURRENT PERMIT
❑ APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE-
WYYMMDD

State of North Carolina
Department of Environment,
Health and Natural Resources
Wilmington Regional Office
Division of Water Quality
James B. Hunt, Jr., Governor
Jonathan B. Howes, Secretary
A. Preston Howard, Jr., P.E., Director
March 26, 1997
Mr. William Buchanan, Partner
South College Associates
298 North Front Street, Suite 309
Wilmington, North Carolina 28401
�EHNR
Subject: Permit No. SW8 970144
The Lakes @Johnson Farms, Phase VI
High Density Subdivision Stormwater Project
New Hanover County
Dear Mr. Buchanan:
The Wilmington Regional Office received the Stormwater Management Permit Application for The Lakes @Johnson Farces,
Phase VI on January 30; 1997, with final information on March 20, 1997. 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. SW8 970144, dated March 26, 1997, for the construction of the project, The Lakes @Johnson
Farms, Phase VI.
This permit shall be effective from the date of issuance until March 26, 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.
If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an ajudicatory
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 2761 I-7447. Unless such demands are made this permit shaII be final and binding.
If you have any questions, orneed additional information concerning this matter, please contact Linda Lewis, or me at (910) 395-
3900.
Sincerely,
Rick Shiver, P.G.
Acting Regional Water Quality Supervisor
RSS/arl: S:IWQSISTORMWAT\PERMIT1970144.MAR
cc: Joseph Hill, P.E.
Tony Roberts, New Hanover County Inspections
Beth Easley, New Hanover County Engineering
Linda Lewis
Wilmington Rcgional•O eicfi' eicfi'
Central Files
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer

State Stormwater Management Systems
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT, HEALTH AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
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 iIEREBY GRANTED TO
South College Associates
The Lakes @Johnson Farms, Phase VI
New Hanover County
M91WW0
construction, operation and maintenance of 2 Detention Ponds 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 March 26, 2007 and shall be subject to the following
specified conditions and limitations:
1. 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 on page
3 of this permit, the Project Data Sheet. This phase of the subdivision is permitted for 94 lots, each
allowed 2,800 square feet of built -upon area.
3. Approved plans and specifications for this project are incorporated by reference and are enforceable parts
.of the permit.
2

State Stormwater Management Systems
Permit No_ 4WR 97f1744
4. 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.
5. The permittee is responsible for verifying that the proposed built -upon area does not exceed the allowable
built -upon area. Once the lot transfer is complete, the built -upon area may not be revised without approval
from the permittee, and responsibility for meeting the built -upon area limit is transferred to the individual
property owner.
6. 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.
f. Filling in, altering, or piping of any vegetative conveyance shown on the approved plan.
In addition, the Director may determine that other revisions to the project should require a modification
to the permit.
7. 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.
II. SCHEDULE OF COMPLIANCE
1. 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 it's entirety, vegetated and operational
for it's intended use prior to the construction of any built -upon surface 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 perraittee grants permission to DE NR Staff to enter the property for the purposes of inspecting the
project for compliance with the conditions of this permit.
3. 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.
4

State Stormwater Management Systems
Permit No- SWS 001-44
Project Name:
Permit Number:
Location:
Applicant:
Mailing Address:
DIVISION OF WATER QUALITY
PROJECT DATA SHEET
The Lakes @Johnson Farms, Phase VI
970144
New Hanover County
Mr. William Buchanan, Partner
South College Associates
298 North Front Street, Suite 309
Wilmington, North Carolina 28401
Application Date: January 30, 1997
Water Body Receiving Stormwater Runoff: Barnards Creek
Classification of Water Body:
"C Sw"
If Class SA, chloride sampling results:
NIA
Pond Number:
4
5
Pond Depth:
4.5 feet
6 feet
Permanent Pool Elevation:
19.04 FMSL
19 FMSL
Total Impervious Surfaces Allowed:
185,820 ft2
219,300 ft2
Number of Lots @2800 ft2 each
41
53
Offsite Area entering Pond:
NIA (per Engineer)
Required Surface Area:
14,424 ftz
11,524 ft2
Provided Surface Area:
15,800 ft2
19,600 ft2
Required Storage Volume:
15,886 ft3
18,716 ft3
Provided Storage Volume:
20,355 ft3
24,660 ft3
Temporary Storage Elevation:
20.6 FMSL
20.2 FMSL
Controlling Orifice:
2" pipe
2" pipe
3

State Stormwater Management Systems
Permit Na_ �S_W897ai44
4. 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 b 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.
g. Access to the outlet structure must be available at all times.
5. 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.
b. Prior to the sale of any lot, deed restrictions must be recorded which limit the built -upon area per lot to
the amount as shown on the Project Data Sheet, per Section 1, Part 2. The recorded statements must
follow the form:
a. "The maximum built -upon area per Iot is 2,800 square feet, inclusive of that portion of the right-
of-way between the lot line and the edge of pavement, structures, pavement, walkways of brick,
stone, or slate, but not including open wood decking. "
b. "The covenants pertaining to stormwater regulations may not be changed or deleted without
concurrence of the State."
C. "Alteration of the drainage as shown on the approved plan may not take place without the
concurrence of the State."
d. "Lots within CAMA's Area of Environmental Concern may be subject to a reduction in their
allowable built -upon area due to CAMA regulations."
e. "In order to assure that runoff from the impervious areas on the lot is directed to the pond, either
roof drain gutters, which direct runoff into the street, must be provided on the home, or two-thirds
of the lot must be graded toward the street."
7. This permit shall become voidable unless the facilities are constructed in accordance with the conditions
of this pennit, the approved plans and specifications, and other supporting data.
8. 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 the sale of any lot. The recorded copy must be stamped with the deed
book number and page, and bear the stamp/signature of the Register of Deeds.
9. 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.
5

State Stormwater Management Systems
10. The ponds' design is based on the runoff from Phase VI of the project. The Engineer has stated that no
off -site runoff enters this pond. If it is determined that off -site runoff is entering the stormwater control
system, the off -site runoff must either be routed around the pond, or the pond must be redesigned and
constructed to account for this runoff.
III. GENERAL CONDITIONS
1. 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 form 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 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) which have jurisdiction.
4. In the event that the facilities fail to perform satisfactorily, including the creation of nuisance conditions,
the Peninittee 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 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.
Permit issued this the 26th day of March, 1997.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
A. Preston Howard, Jr., P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission
Permit Number SWS 970144
C

Permit No. SG; 3 q701
~ (to be provided by DW01
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MAINAGEMENT 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 a wet detention basin supplement for each basin,
design calculations, plans and specifications showing all basin and outlet structure details, and a signed and
notarized operation and maintenance agreement.
I. PROJECT INFORMATION (please complete the following information):
Project Name : The— L zkes e a ir1.s0`7 f'2e-­r7 S �.
Contact Person: Phone Number:
For projects with multiple basins, specify which basin this worksheet applies to: PONO tp
Basin Bottom Elevation 11. 9 -ft
Permanent Pool Elevation 19.04 ft
Temporary Pool Elevation Zo - Co ft
Permanent Pool Surface Area 05, 800 - sq. ft.
Drainage Area j(j,74 ac.
Impervious Area 4. 2&(p ac.
Permanent Pool Volume i / A cu. ft.
Temporary Pool Volume _2 (,Co 1 cu. ft.
Forebay Volume cu. ft.
(average elevation of the floor 'of the basin)
(elevation of the orifice)
(elevation of the discharge structure overflow)
(water surface area at the orifice elevation)
(on -site and off -site drainage to the basin)
(on -site and off -site drainage to the basin)
(combined volume of main basin and forebay)
(volume detained above the permanent pool)
SA/DA 1 used - _ - _ -- - _-.._ �. 3 - o ---- _---(surface area-to-drainagearea ratio
Diameter of Orifice - ---- ——- _.-
Design TSS Removal 'IQ % (85% TSS removal required, see item k below)
II. 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, November 1995) 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 1?errriit
Application Form, the agent may initial below. If a requirement has not been met, attach justification.
Form SWiJ-lot Rev 1/August 1998 Paze 1 of 3

Ap licants Initials
a. The temporary pool controls runoff from the 1 inch storm event.
b. The basin length to width ratio is greater than 3:1.
c. The basin side slopes above the permanent pool are no steeper than 3:1. w
d. A submerged and vegetated perimeter shelf at less than 6.1 is provided (show detail).
e, Vegetation above the permanent pool elevation is specified.
f An emergency drain is provided to empty the basin-
g..The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet).
h. The temporary pool draws down in ? to 5 days.
i. A trash rack is provided for both the overflow and orifice.
A(�), j. The forebay volume is approximately equal to 20% of the total basin volume.
k. Sediment storage is provided in the permanent pool.
1. A 30-foot vegetative filter is provided at the outlet'- (include erosive flow calculations)
m. Recorded drainage easement for each basin including access to nearest right-of-way.
n. A site specific operation and maintenance (O&M) plan is provided.
o. A vegetation management/mowing schedule is provided in the O&M plan.
p. Semi-annual inspections are specified in the O&M plan.
q. A debris check to be performed after every storm event is specified in the O&M plan.
r. Specific clean -out benchmarks are specified in the O&M plan (elevation or depth).
s. A legally responsible party is designated in the O&M plan3 (include name and title).
t. If the basin is used for sediment and erosion control during construction, clean out of the
basin is specified to be performed prior to use as a wet detention basin.
Footnotes:
1 When usin- the Division SAIDA 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.
' The requirement for a vegetative filter may be waived if the wet detention basin is designed to meet 90% TSS removal.
' The legally responsible party should not be a homeowners -association unless more than 50% of the -lots have beeti sold and'a
resident of the subdivision has been named the president.
III. WET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
The wet detention basin system is defined as the wet detention basin, forebay, non-integrated pretreatment
systems (pretreatment other than forebays), and the vegetated filter if one is provided.
This system (check one) ❑ does ';�does not incorporate a vegetated filter.
This system (check one) ❑ does does not incorporate non-integrated pretreatment.
Maintenance activities shall be performs as follows:
After every significant runoff producing rainfall event and at least monthly:
Form S WU-102 Rev 1/August 1998 Patre 2 of 3

a. Inspect the wet detention basin system for sediment accumulation; erosion, trash accumulation, grass
cover, and general condition.
b. -Check and clear the orifice of any obstructions such that drawdown of the terriporary pool occurs within
2 to 5 days.
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. 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
wet detention basin or stream, etc.).
The original design depth is: 4.5 r
The sediment removal benchmark depth is: 3.375
5. Remove cattails and other indigenous wetland plants when they cover 75% of the basin surface. These
plants shall be encouraged to grow along the basin perimeter.
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.
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 above
maintenance procedures. I agree to notify DWQ of any problems with th6 system or changes in the name of the
project, responsible party, or address.
Print name:
Address:
Phone:
Tit] e:
Signature: - --
I,
County of
a Notary Public for the State of
do hereby certify that
personally appeared before me this day of -_ - , 19�, and acknowledge the
due execution of the forgoing infiltration system maintenance requirements. Witness my hand and official seal,
SEAL
My commission expires
Forrn SWU-102 Rev VAumust 1998 Page 3 of 3

Permit No. SLu-
(to be provided by DWO)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality `
STORMWATER MANAGEMENT PERMIT APPLICATION FORIvl
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 a wet detention basin supplement for each basin,
design calculations, plans and specifications' showing all basin and outlet structure details, and a signed and
notarized operation and maintenance agreement.
I. PROJECT INFORMATION (please complete the following infdrmation):
Project Name: j le- Lz�,ke5 0hn50,g r4rrn5 R
Contact Persbn: Phone Number: }
For projects with multiple basins, specify which basin this worksheet applies to: pGtiD 4:r S
Basin Bottom Elevation /3 .ft.
Permanent Pool Elevation 101 ft_
Temporary Pool Elevation 20, 2 ft.
Permanent Pool Surface Area / rj0 sq. ft.
Drainage Area f2. ac.
Impervious Area 5 034- ac.
Permanent Pool Volume N JA cu. ft.
Temporary Pool Volume ^ 2�, &&Q cu. ft.
Forebay Volume &11,4� cu. ft.
(average elevation of the floor of the basin)
(elevation of the orifice)
(elevation of the discharge structure overflow)
(water surface area at the orifice elevation)
(on -site and off -site drainage to the basin)
(on -site and off site drainage to the basin)
(combined volume of main basin and forebay)
(volume detained above the permanent pool)
SAiDAI_used ________._ _-__-._._ 2: �l�---��_�_ _ (surface area todrainage.area ratio) -- --- - --
Diameter of Orifice 2 in.
Design TSS Removal 1 0 %
TI. REQUIRED ITEMS CHECKLIST
(85% TSS removal required, see item k below)
The following checklist outlines design requirements per the Stormwater Best Management Practices manual
(N. C. Department of Environment, Health and Natural Resources, November 1995) and Administrative Code
Section: 15 A NCAC 2H .1008-
Irritial 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, attaeb justification.
Form-SWU-102 Rev 1/August 1998 Paue 1 of

-'T'Ik+plicants Initials
a.
The temporary pool controls runoff from the 1 inch storm event.
b.
The basin length to width ratio is greater than 3:1.
c.
The basin side slopes above the permanent pool are no steeper than 3:1.
d.
A submerged and vegetated perimeter shelf at less than 6:1 is provided (show detail).
e.
Vegetation above the permanent pool elevation is specified.
f.
An emergency drain is provided to empty the basin.
g.
The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet).
h.
The temporary pool draws down in 2 to 5 days_
i.
A trash rack is provided for both the overflow and orifice.
N\0� j.
The forebay volume is approximately equal to 20% of the total basin volume.
-
k.
Sediment storage is provided in the permanent pool.
1.
A 30-foot vegetative filter is provided at the outlet'- (include erosive flow calculations)
rn.,Recorded
drainage easement for each basin including access to nearest right-of-way.
n.
A site specific operation and maintenance (O&M) plan is provided.
o.
A vegetation management/mowing schedule is provided in the O&M plan.
p.
Semi-annual inspections are -specified in the O&M plan.
q. A debris check to be performed after every storm event is specified in the O&M plan.
r. Specific clean -out benchmarks are specified in the O&M plan (elevation or depth).
s. A legally responsible party is designated in the O&M plan3 (include name and title).
t. If the basin is used for sediment and erosion control during construction, clean out of the
basin is specified to be performed prior to use as a wet detention basin.
Footnotes:
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.
The requirement for a vegetative filter may be waived if the wet detention basin is designed to meet 90% TSS removal.
3 The legally responsible party should not be ­a homeowners association unless more than �0% of the lots have been sold and a
resident of the subdivision has been named the president.
III. WET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
The wet detention basin system is defined as the wet detention basin, forebay, non-integrated pretreatment
systems (pretreatment other than forebays), and the vegetated filter if one is provided.
This system (check one) ❑ does 4 does not incorporate a vegetated filter.
This system (check one) ❑ does `does not incorporate non-integrated pretreatment.
Maintenance activities shall be performs as follows:
After every significant runoff producing rainfall event and at least monthly:
Form SWU-102 Rev 1/August 1998 Paae 2 of

a. Inspect the wet detention basin system'for sediment accumulation, erosion, trash accumulation, grass
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.
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. 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
wet detention basin or. stream, etc.).
The original design depth is: &r
The sediment removal benchmark depth is: 4.5
5. Remove cattails and other indigenous wetland plants when they cover 75% of the basin surface. These
plants shall be encouraged to grow along the basin perimeter.
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.
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 above
maintenance procedures. I agree to notify DWQ of any problems with the system or changes in the name of the
project, responsible party, or address.
Print name:
Address:
Phone:
Title:
Signature:
....Date:�::-�.---
I,
County of
personally appeared before me this
a Notary Public for the State of
do hereby certify that
day of , 19 , and acknowledge the
due execution of the forgoing infiltration system maintenance requirements. Witness my hand and official seal,
SEAL
My commission expires
Form SWU-102 Rev I/August I99S Paae 3 of 3

Permit No.
Y 0o be provided by D"IQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMI'VATER MANAGEMENT PERMIT APPLICATION FORM
WET DETENTION BASIN SUPPLEMENT
This form may be photocopied for use as an original
DWO Stormwater Manazement Plan Review_ :
A complete stormwater management plan submittal includes an application form, a we detention basin
supplement for each basin, design calculations, and plans and specifications showing all basin and outlet
structure details.
I. PROJECT INFORMATION
Project Name: _ Ti, Lse 7J%n so-7 1`orin- 5
Contact Person: Phone Number. l 1
For projects with multiple basins, specify which basin this worksheet applies to: PyNO #
elevations
Basin Bottom Elevation i4• ft (floor of the basin)
Permanent Pool Elevation j 0 ¢ ft_ (elevation of the orifice)
Temporary Pool Elevation 20, (o ft. (elevation of the discharge structure overflow)
areas
Permanent Pool Surface Area 1' 00 sq. ft. (water surface area at the orifice elevation)
Drainage Area [D,q4 ac. (on -site and off -site drainage to the basin)
Impervious Area 4. (P ac. (on -site and off -site drainage to the basin)
volumes
Permanent Pool Volume
Temporary Pool Volume
Forebay Volume
Other parameters
SAIDA1
Diameter of Orifice
Design Rainfall
Design TSS Removal Z
rU 14 cu. ft_ (combined volume of main basin and forebay)
T 2 to# cu. ft. (volume detained above the permanent pool)
cu. ft. (approximately 20% of total volume)
3,08 �o (surface area to drainage area ratio from DWQ table)
2 in_ (2 to 5 day temporary pool draw -down required)
1 in.
90 % (minimum 85% required)
Form SWU-102 Rev 3.99 Page 1 of 4

Footnotes:
t When using the Dkision SAIDA tables: the correct SAIDA ratio for permanent pool sizing should be computed based upon the
actual impervious ,r 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.
U. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Stormwater Best Management Practices Manual
(N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code
Section: 15 A NCAC 2H .1008.
Initial in the space provided to indicate the following design requirements have been met and supporting
documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit
Application Form, the agent may initial below. If a requirement has not been met, attach justification.
Applicants Initials
a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet)..
N1 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:
Nrf 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.
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.
N 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.
m. A mechanism is specified which will drain the basin for maintenance or an emergency.
M. 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 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

Permit No
(to be Provided by DW0
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.
I. PROJECT INFORMATION
Project Name: -Tkr- L Form Ph . TT
Contact Person: Phone Number: )
For projects with multiple basins, specify which basin this worksheet applies to: An �_j s
elevations
Basin Bottom Elevation r3 ft. (floor of the basin)
Permanent Pool Elevation 1 `3 ft. (elevation of the orifice)
Temporary Pool Elevation Zy. 2 fL (elevation of the discharge structure overflow)
areas
Permanent Pool Surface Area 11. &()o sq. ft. (water surface area at the orifice elevation)
Drainage Area I Z, 50 ac. (on -site and off -site drainage to the basin)
Impervious Area 503 4- ac. (on -site and off -site drainage to the basin)
volumes
Permanent Pool Volume
Temporary Pool Volume
Forebay Volume
Other parameters
s AfDA t
Diameter of Orifice
Design Rainfall
Design TSS Removal 2
01 cu. ft. (combined volume of main basin and forebay)
Z ,. (o(0D cu. ft. (volume detained above the permanent pool)
tJLA- cu. ft. (approximately 20% of total volume)
2,1l -7 Yo
Z in.
(surface area to drainage area ratio from DWQ table)
(2 to S ray temporary pool draw -down required)
(minimum 85% required)
Form SWU-102 Rev 3.99 Pale 1 of 4

Footnotes:
1 When using the Division SA/DA tables, the correct SA(DA ratio for permanent pool sizing should be computed based upon the
actual impervious 5a and permanent pool depth. Linear interpolation should be employed to determine the correct value for noo-
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 pro�,ides design tables for both 85% TSS removal and 90% TSS removal.
II. 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 attachdd. 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.
i
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.
f c. The temporary pool controls runoff from the design storm event.
--*" d. The temporary pool draws down in 2 to 5 days.
f1l 1A 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.
g. The basin side scopes above the permanent pool are no steeper than 3:1.
h.
j.
k.
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. _
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.
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 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 thecollection 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 duality
(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 feet in the main pond, the sediment shall be removed.
When the permanent pbol depth reads r feet in the forebay, the sediment shall be removed.
BASIN DIAGRAM
(fell in the blanks)
V Permanent Pool Elevation
Sediment Re ovalEl. 75
------- ----- - Sediment Removal Elevation --- 75%
m BottoEle anon ^�
------------------------------------ -----
Bottom Elevation _ - 25%
FOREBAY . MAIN POND
5. Remove cattails and other indigenous wetland plants wheA they cover 50% of the basin surface. These
plants shall be encouraged to grow along the vegetated shelf and forebay berm_
5. 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

t
7. All components of the wet detention basin system shall be maintained in good working order.
4
' � I
I acknowledge and agree by my signature below that I am responsible for the performance of the seven
maintenance procedures listed above. 1 agree to notify DWQ of any problems with the system or pnortd-any
changes to the system or responsible party.
Print name: _
Title: +
Address:
Phone
Date
Note: The legally responsible party should not be a homeowners association unless more than 50% of the Iots hove been sold and
a resident of the subdivision has been named the president
a Notary Public for the State of ,
County of , do hereby certify that
personally appeared before me this day of , and acknowledge the due
execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal,
0
SEAL
My commission expires
Form SW-102 Rev 3.99 Page 4 of 4

Permit No. _SLk' l�
(to be proOded by DIV&
i 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 1�4r1d� 1
Project Name: _ Tht� �1t �.lrS �d�n5on _l'1'J
Contact Person: Phone Number: ( ] _ I _
For projects with multiple basins, specify which basin this worksheet applies to: pond #_4
elevations
Basin Bottom Elevation 0 ft. (floor of the basin)
Permanent Pool Elevation ft. (elevation of the orifice)
Temporary Pool Elevation to • ft. (elevation of the discharge structure overflow)
areas
Permanent Pool Surface Area `J� to sq. ft. (water surface area at the orifice elevation)
Drainage Area ac. (on -site, and off -site drainage to the basin)
Impervious Area Jr W..fJ1_ (on -site and off -site drainage to the basin)
volumes
Permanent Pool Volume
Temporary Pool Volume
Forebay Volume
Other parameters
SA/DA t
Diameter of Orifice
Design Rainfall
Design TSS Removal 2
cu. ft.
Z Cu. ft.
Nl pt cu. ft.
z. Gc
- 1-5 " in.
1 in.
(combined volume of main basin and forebay)
(volume detained above the permanent pool)
(approximately 20% of total volume)
(surface area to drainage area ratio from DIVQ table)
(2 to 5 day temporary pool draw -down required)
(minimum 85% required)
Form SWU-102 Rev 3.99 Page 1 of 4

Footnotes:
t When using the Division SAIDA tables, the correct SAIDA ratio for permanent pool sizing should be computed based upon the
actual impervious 17c 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.
II. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Stormwater Best Management Practices Manual
(N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code
Section: 15 A NCAC 2H .1008.
Initial in the space provided to indicate the following design requirements have been met and supporting
documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit
Application Form, the agent may initial below. If a requirement has not been met, attach justification.
Applicants Initials
✓ a.
The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet).
A) A- b.
The forebay volume is approximately equal to 20% of the basin volume.
t✓ c.
The temporary pool controls runoff from the design storm event.
d.
The temporary pool draws down in 2 to 5 days.
_ N L4 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.
k.
A recorded drainage easement is provided for each basin including access to nearest right-
of-way.
iJ ,4 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.
fm. 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 W does not incorporate a vegetated filter at the outlet. -
This system (check one) 0 does oes not incorporate pretreatment other than a forebay.
Form VirU-l02 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 16mporary 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 feet in the main pond, the sediment shall be removed.
When the permanent pool depth reads feet in the forebay, the sediment shall be removed.
Sediment Re oval El.
------�-�---- --
Bottom Ele atiou lH } `�
FOREBAY
BASIN DUGRAM
(fill in the blanks)
Permanent Pool Elevation
Sediment Removal Elevation 755b.
------------------------------- —-----------1-259
------
Bottom Elevation 14'
62�
MAIN POND
5. Remove cattails and other indigenous wetland plants whep they cover 50% of the basin surface. These
plants shall be encouraged to grow along the vegetated shelf and forebay berm.
6. If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment
through the emergency drain shall be minimized to the maximum extent. practical.
Form SWU-102 Rev 3.99 Page 3 of 4

7. All components of the wet detention basin system shall be maintained in ¢ood 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
chanties to the system or responsible party.
Print name:
Tit] e:
Address -
Phone --
Signature:
Date:
Note: The legally responsible party should not be a homeowners association unless more than 50% of the lots have a been sold and
a resident of the subdivision has been named the president
I, , a Notary Public for the State of ,
County of , do hereby certify that
personally appeared before me this day of , and acknowledge the due
execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal,
SEAL
My commission expires
Form SWU-102 Rev 399 Page 4 of 4

Maintenance activities shall be performed as follows:
l . 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.
i
4. Remove accumulated sediment from the wet detention basin systerri 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 ¢- 5 feet in the main pond, the sediment shall be removed.
onto iblOO)WOM
BASIN DIAGRAM
(fill in the blanks)
N f14
t7 Permanent Pool Elevation 'I
Sediment Re oval El. � 75
------ -- Sediment Removal Elevation 1 U, 2
ottom a ation-------------175%
------
Bottom Elevation y� —] 25% /
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

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:
Title:
Address:—
Phone: —
Signature:
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.
I, , a Notary Public for the State of ,
County of , do hereby certify that
personally appeared before me this day of , and acknowledge the due
execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal,
SEAL
My commission expires
Form SWU-102 Rev 3.99 Pape 4 of 4

Permit No.
(to he 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.
I. PROJECT INFORMATION
Project Name:
C 'Dhct 2
k
Contact Person: Phone Number:
For projects with multiple basins, specify which basin this worksheet applies to: I) #Z-
elevations
Basin Bottom Elevation ! - q ft.
Permanent Pool Elevation ft.
Temporary Pool Elevation ft.
(floor of the basin)
(elevation of the orifice)
(elevation of the discharge structure overflow)
areas
Permanent Pool Surface Area---], sq. ft. (water surface area at the orifice elevation)
Drainage Area g t 9 ac. (on -site and off -site drainage to the basin)
Impervious Area /5 Z ae. 2 {on -site and off -site drainage to the basin)
volumes
Permanent Pool Volume
Temporary Pool Volume
Forebay Volume
Other parameters
SA/DA 1
Diameter of Orifice
Design Rainfall
Design TSS Removal 2
cu. ft.
110, 7q Icu. ft.
N cu. ft.
• 5— in.
in.
(combined volume of main basin and forebay)
(volume detained above the permanent pool)
(approximately 20% of total volume)
(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 l of 4

Footnotes:
When using the Division SAIDA tables, the correct SA/DA ratio for permanent pool sizing should be computed based upon the
actual impervious Flo 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.
11. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Stormwater Best Management Practices Manual
(N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code
Section: 15 A NCAC 2H .1008.
Initial in the space provided to indicate the following design requirements have been met and supporting
documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit
Application Form, the agent may initial below. If a requirement has not been met, attach justification.
Applicants Initials
✓ a.
-The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet).
b.
The forebay volume is approximately equal to 20% of the basin volume.
✓ c.
The temporary pool controls runoff from the design storm event.
d.
The temporary pool draws down in 2 to 5 days.
' 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.
✓ k.
A recorded drainage easement is provided for each basin including access to nearest right-
of-way.
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.
✓ 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 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:
l . 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. I ,
i
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 1 feet in the main pond, the sediment shall be removed.
... : .. _ e
Sediment Red�oval El.
Bottom
FOREBAY
BASIN DIAGRAM
(fill in the blanks)
Permanent Pool Elevation
rV Sediment Removal Elevation
Bottom Elevation 9 p
MAIN POND
75%
25%
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-142 Rev 399 Page 3 of 4

7. All components of the wet detention basin system shall be maintained in good working order. 1 ii
l
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:
Title:
Address:
Phone:
Signature:___
Date:
Note: The legally responsible party should not be a homeowners association unless more than 50% of the lots ha{ a been sold and
a resident of the subdivision has been named the president.
I, , a Notary Public for the State of ,
County of , do hereby certify that
personally appeared before me this day of , and acknowledge the due
execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal,
SEAL
My commission expires
Form SWU-102 Rev 3.99 Paoe 4 of 4

* NORTH CAROLINA STORMWATER MANAGEMENT PERMIT APPLICATION
I. GENERAL INFORMATION
1. Project Name The Lakes at Johnson Farms — Phase VI
2. Location, directions to project ('include County, Address, State Road) Attach map. + mile west
College Road at the end of Pine Hollow Drive 1.
3. Owner's Name South College Associates
Phone [phone]
.. ... 4.Owner'sMailingAddress: 298 N. Front Street, Suite 309
City Wi lmi ngton State N. C. Zip
5. Nearest Receiving Stream
Barnards Creek
Class C sw
28401•
6.Projectdescription Subdivision with curb & gutter streets, storm drainage
collection system, wet detention pond method of treatment
II. PER UT INFORMATION
1. Permit No.(Fo be filled in by DEW) 5W6 Tf 014-4r Fee Enclosed $ 385,00
2. Permit Type �New Renewal Modification (existing Permit No.?)
3. Project Type: Low Density X Detention Infiltration Other: Redevelop General D r Cert
4. Other StatelFederal Permits/Approvals Required (creek appropriate bi =l )
CAMA Major.
Sedimentation/Erosion Control X 404 Permit
III. BUILT UPON AREA (Please see YC4C ZH 1005 thru .1007 for applkabu densfry u,niq)
Pond #4 Pond #5
Drainage Drainage Breakdown of Impervious Area
Basin Basin (Please indicate below the design impervious area)
Classification
Allowable Impervious Area
Total Project Area
#4 114, 800 SF
C sw C sw Buildings #5 — 148, 400 SF
30' 30% (Incl. Driveways) #4 — 68,980 SF
Streets #5 — 69,640 SF
10.74 AC 12.50 AC
Proposed Impervious Area 4.22 AC 5.01 AC
Impervious Area 39. 3% 40.17.
IV. STOILMWATER TREATMENT {Describe haw d- runoff will be treated)
Two wet detentio�onds.
Paridng/SW N/A
Other VA
A
#4 — 183,780
Totals jr, — 218,040

V. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
Deed restrictions and protective covenants are required to be recorded for all low density projects and all
subdivisions prior to the sale of any lot. Please see Attachment A for the specific items that must be recorded
for the type of project applied for.
By your signature below, you certify that the recorded deed restrictions and protective covenants•for this project
shall include all the items required by the permit, that the covenants will be binding on all parties and persons
claiming under them, that'they will run with the land, that the covenant cannot be changed or deleted without
concurrence from the State, and that they will be recorded prior to the We of any lot.
VI. OWNER'S CERTIFICATION
I, William H . Buchanan certify that the information included on this permit
(Please print or rype name clearly)
application form is correct, that the project will be constructed in conformance with the approved plans, that
the deed restrictions will be recorded with all required permit'conditions, and that to the best of my knowledge,
the proposed project complies with the requirements of 15A NCAC 2H.1000.
I authorize the below named person or firm to submit stormwater plans on my behalf.
Owner/
VII. AUTHORIZATION (musr BE compLETw)
Signature irfd Title
Person or firm name Joseph S. Hill, Jr, and Associates
Mailing Address
City Wilmington
1602 Harbour Drive
State N. C. Zip
28401
/-ZZ 9% .1---"
Date
Phone [phone]
Please submit form to the Regional Office that serves the area that the project is located, as indicated on
Attachment B.
cc: Applicant/W iRO// Central Files
F�GSu6rn + Ffcj
3 f zo [97
STORMWATE0 i
,jAN 2 6 19971
pu-) Bcn o _

ATTACHMENT A
LOW DENSITY AND SUBDIVISION PROJECTS
GENERAL SUBMITTAL REQUIREMENTS
A completed stormwater permit application.
2. Two sets of plans showing north arrow, scale, revision date, property/project boundaries, lot lines,
proposed and existing contours, drainage areas, mean high water line, wetlands, easements, the 30'
minimum vegetated buffer between impervious areas and surface waters, proposed impervious areas,
and road cross -sections.
Calculations of the built -upon area, For subdivisions, please show the methodology for arriving at the
per lot built -upon area. For non -subdivision projects, please break down the calculation into buildings,
roads, parking, and other (include all impervious areas).
4. Low density projects with curb and gutter will require:
a. Drainage area delineation and swale locations shown on the plans.
b. Detail of the swale, showing minimum 5:1 side slope.
C. Velocity calculations, indicating a non -erosive flow for the 10 yr storm.
d. Inlet and outlet elevations. Maximum longitudinal slope is 5%.
e. The type of vegetated cover specified on the plans.
DEED RESTRICTION REQUIREMENTS
The following statements must be included for all -low density projects, and for all subdivisions:
No more than 2,800 square feet of any lot, including that portion of the right-of-way between the edge
of pavement and the front lot line, shall be covered by impervious structures, including asphalt, gravel,
concrete, brick, stone, slate or similar material, not including wood decking or the water surface of swimming
pools. This covenant is intended to ensure continued compliance with the storm water permit issued by the State
of North Carolina. The covenant may not be changed or deleted without the consent of the State.
No one may fill in or pipe any roadside or lot -line Swale, except as necessary to provide a minimum driveway
crossing.
For curb and gutter projects, no on may pipe, fill in, or alter any lot line swale used to meet North Carolina
Stormwater Management Permit requirements.
NOTE If lot sizes vary significantly, the owner/developer must provide an attachment listing each lot number, size,
and the allowable built -upon area for each lot.
STORMWATER
E C E I V E
JAN 2 81997
PROJ # LQ C10

STORMWATLri Q L C L
JA N 2 81997 U
THE LAKES AT JOHNSON FARMS - PHASE VI
STORMWATER MANAGEMENT SYSTEM f
OPERATION AND MAINTENANCE PLAN pROJ q`�a#
The stormwater management system, to include but not limited to all swales,
berms, infiltration and collection devices, stormwater detention pond, inlet and outlet
structures shall be owned and operated by the Lakes at Johnson Farms Homeowner's
Association.
Operation and Maintenance shall include:
1. Establish and maintain vegetation by seeding, fertilizing, and mulching to
achieve vigorous growth.
2. Mow all grassed areas, including vegetative filters, swales, basin banks,
etc., monthly or as needed according to growing season.
3. Inspect all catch basins, ditches, swales, pipes or other stormwater
diversions and conveyance structures monthly for accumulation of debris
or sediment. Remove obstructions as necessary.
4. Inspect vegetated swales, forebay, wet detention pond side slopes, inlet
and outlet areas of diversion structures for sloughing, erosion, or washout
of cover vegetation monthly and following precipitation events.
Immediately repair and revegetate damaged areas.
5. Inspect stone rip rap or other energy dissipation devices monthly and
following precipitation events. Reposition dislodged stone or add new
stone as necessary. Repair structures as necessary.
6. Inspect outlet structure monthly and following precipitation events. Skim
floating debris from area between trashguard and riser. Visually inspect
outlet orifice and weir assembly. Remove accumulated deposits of scale,
algae, and floating debris by scouring with stiff bristled brush.
Wz. r at)21i a,(u-I
7. Notify N.C. Division of€e+f-ee t [phone] if
detention pond water level does not return to permanent pool elevation
within five days following a precipitation event.
8. Measure forebay and detention pond bottom annually at sufficient points
to monitor sediment accumulation. Sediment shall be removed when
average accumulation of one (1) foot of sediment occurs.
OWNER: ✓
William H. Buchan , Jr. - Partner
South College Associates
228 N. Front Street, Suite 309
Wilmington, N.C. 28401
OU'
NOTARY
�9titBL��,6-19
DATE:
S:DATE:
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