SW8070333_Current Permit_20180711

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Energy, Mineral &
Land Resources
ENVIRONMENTAL QUALITY
July 11, 2018
Brunswick STU and Associates. LLC
Attm Mr. Michael G. Sandman, Manager
7101 Creedmoor Road
Raleigh, NC 27613
Subject: Permit Correction and Extension
Rice Creek Plantation — Phase 1
Stormwater Permit No. SW8 070333
Brunswick County
Dear Mr. Sandman
ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
WILLIAM E. (TOBY) VINSON, JR.
Interim Director
Effective August 1, 2013, the State Stormwater program was transferred from the Division of
Water Quality (DWQ) to the Division of Energy, Mineral and Land Resources (DEMLR). All
previous references to DWQ will remain in older stormwater permits issued prior to August 1
2013 until they are modified. Please note that this letter (permit) references DEMLR as the
Division responsible for issuance of the permit.
Permit Correction:
The Wilmington Regional Office issued the subject project a permit on August 9, 2010 and
recently discovered it contained an error. This permit correction is to document the drainage
area for Pond 8. Another State Stormwater permit, SW8 071210 drains partially offsite to Pond
8 of your permit, SW8 070333. The other permit, SW8 071210, recently modified its permit and
during that process it was discovered that the drainage area for Pond 8 is not on file. DEMLR
contacted the original design engineer, David Bowman, PE, and he also did not have a copy.
This Permit Correction is to document that the drainage area for Pond 8 has been moved inside
the SW8 071210 project area, and that the most recent Pond 8 drainage area can be found in
the SW8 071210 file (for the area covered by SW8 071210). The drainage area draining from
SW8 071210 (14.76ac/642,736sf) as well as the impervious area allocated to SW8 071210 by
SW8 070333 (246,395sf) remains unchanged. The drainage area line simply moved. Typically,
the DEMLR would have required your permit to have a Minor Modification to move the line
inside the SW8 070333 permit file. However, since the original line did not exist a Permit
Correction has been issued instead. This corrected permit does not impose new or different
terms; it merely restates some of the previous terms to provide you with a better understanding
of your obligations under the permit. Please replace the previously issued permit with the
enclosed corrected permit.
Permit Extension:
On August 5, 2009, the Governor signed Session Law 2009-406. This law impacts any
development approval issued by the Division of Energy, Mineral and Land Resources under
Article 21 of Chapter 143 of the General Statutes, which is current and valid at any point
between January 1, 2008, and December 31, 2010. The law extends the effective period of any
stormwater permit that was set to expire during this time frame up to three (3) years from its
current expiration date. On August 2, 2010, the Governor signed Session Law 2010-177, which
granted an extra year for an extension of up to four (4) years Your permit had been set to
expire on April 26, 2017. It has been extended until April 26, 2021.
State of North C-iroltna ( Erivironrnci;tal Quality i Energy. Mintxni and Land Resources
M tnington Reglonr l Office 1 127 Cardinal Drive Extension I Wiiinington, NC 28405
4107967215

State Stormwater Permit No. SW8 070333
Page 2 of 2
This project is subject to the conditions and limitations as specified in the corrected
permit. Please pay special attention to the conditions listed in this permit regarding the
Operation and Maintenance of the BMP(s), recordation of deed restrictions; certification of the
project; procedures for changes of ownership; transferring the permit; and renewing the
permit. Failure to establish an adequate system for operation and maintenance of the
stormwater management system, to record deed restrictions, to transfer the permit, or to renew
the permit; will result in future compliance problems.
If any parts; requirements, or limitations contained in this permit are unacceptable, you have the
right to request an adjudicatory hearing by filing a written petition with the Office of
Administrative Hearings (OAH). The written petition must conform to Chapter i 50B of the North
Carolina General Statutes; and must be filed with the OAH within thirty (30) days of receipt of
this permit. You should contact the OAH with all questions regarding the filing fee (if a filing fee
is required) and/or the details of the filing process at 6714 Mail Service Center, Raleigh, NC
27699-6714, or via telephone at 919-431-3000, or visit their website at www.NCOAH:com.
Unless such demands are made this permit shall be final and binding.
If you have any questions, need additional copies of the permit or approved plans, please
contact Kelly Johnson with DEMLR in the Wilmington Regional Office at [phone].
Sincerely,
For William E. (Toby) Vinson, Jr.. PE, CPESC, CPM, Interim Director
Division of Energy, Mineral and Land Resources
070333j: \\\Stormwater\Permits.& Projects120071070333 HD12018 07 permit correction
cc: Inspector, Brunswick County Building Inspections
Wilmington Regional Office Stormwater File
State of Nc: th Carofin ! Ent, ir onmen:..! Quality Energy. Mincra and Land Resotwces
Wiltnilvtor. Rcgiona. Office 1 127 Cardinal Drive Extension I Wilmington. NC 28405
q 10 796 72 i5

State Stormwater Management Systems
Permit No. SW8 070333
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF ENERGY, MINERAL AND LAND RESOURCES
STATE STORMWATER MANAGEMENT PERMIT
HIGH DENSITY SUBDIVISION 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
Brunswick STU and Associates, LLC
Rice Creek Plantation — Phase I
US 17, Brunswick County
FOR THE
construction, operation and maintenance of ten (10) wet detention ponds in compliance with the
provisions of 15A NCAC 2H .1000, effective September 1, 1995 (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 Energy,
Mineral and Land Resources (DEMLR) and considered a part of this permit.
This permit shall be effective from the date of issuance until April 26, 2021 and shall be subject
to the following specified conditions and limitations:
I. DESIGN STANDARDS
1. This permit is effective only with respect to the nature and volume of stormwater
described in the application and other supporting data.
2. This stormwater system has been approved for the management of stormwater runoff as
described in Sections 1.6 and 1.7 of this permit. Each of the stormwater controls has
been designed to handle the runoff from that maximum amount of built -upon area listed
in Sections 1.6 and 1.7 of this permit. Each wet detention pond must be operated with a
30' vegetated filter.
3. The tract will be limited to the amount of built -upon area indicated in this permit, and per
approved plans.
4. All stormwater collection and treatment systems must be located in either dedicated
common areas or recorded easements. The final plats for the project will be recorded
showing all such required easements, in accordance with the approved plans.
5. The runoff from all built -upon area within the permitted drainage area of this project must
be directed into the permitted stormwater control system.
Page 3 of 12

State Stormwater Management Systems
Permit No. SW8 070333
6. The following design elements have been permitted for the wet detention ponds 1
through 6, and must be provided in the system at all times.
Design Criteria
Pond #1
Pond #2
Pond #3
Pond #4
Pond #5
Pond #6
a. Drainage Area, acres:
8.69
7.33
12.73
11.17
4.55
2.79
Onsite, ftz
378,444
319,410
554,482
486,629
198,391
121,564
Offsite, ft2
None
None
None
None
None
None
b. Total Impervious
187,943
236,419
178,739
242,219
92,613
50,094
Surfaces, ftz
140,116
195,764
113,476
184,336
68,190
31,538
(1) Buildings
45,512
37,654
63,523
55,012
23,335
18,077 j
(2) Streets
2,306
3,001
1,740
2,871
1,088
479 j
(3) Sidewalks
None
None
None
None
None
None
(4) Offsite
c. Design Storm, inches
1
1
1
1
1
1
d. Pond Depth, feet
6
6.5
6
6.5
6
4
e. TSS removal efficiency,
85
85
85
85
85
85
f. Permanent Pool Elev.,
23
23
23
20
19
24
FMSL
g. Perm. Pool Surface
8,413
8,716
10,408
12,288
7,154
5,502
Area, ftz
h. Permitted Storage
19,560
20,251
23,893
27,917
16,863
6,096
Volume, ft3
L Temporary Storage
25
25
25
22
21
25
Elev., FMSL
}. Controlling Orifice, V
1.5
2
1.5
2
1
1
pipe
k. Permitted Forebay
4,942
4,780
6,110
7,913
3,482
1,946
Volume, ft3
I. Receiving Stream/River
Rice Creek / Cape Fear
Basin
m. Stream Index Number
18-81-6
n. Classification of Water
C;Sw
Body
o. Max. fountain
1/8
1/8
1/8
1/8
1/8
1/8
horsepower
Page 4 of 12

State Stormwater Management Systems
Permit No. SW8 070333
7. The following design elements have been permitted for the wet detention ponds 7
through 10, and must be provided in the system at all times.
Design Criteria
Pond #7
Pond #8
Pond #9
1 Pond #10
a. Drainage Area, acres:
I 10.40
15.93
3.35
i 5.52 j
Onsite, ft2
452,857
51,030
146,113
240,645
Offsite, ft2
None
642,736
None
None
b. Total Impervious
i 235,591
275,779
62,982
89,462
Surfaces, ft2
j 174,148
0
30;072
I 65,652
(1) Buildings
j 58,703
29,384
32,431
j 22,810
(2) Streets
2,740
0
479
1,000
(3) Sidewalks
None
246,395
None
! None
(4) Offsite (SW8 071210)
j
c. Design Storm, inches
1
1.5
1
1
d. Pond Depth, feet
j 6
12
6
6
e. TSS removal efficiency,
85
85
85
85
%
f. Permanent Pool Elev.,
23
23
24
20.5
FMSL
g. Perm. Pool Surface Area,
10,534
17,987
10,792
6,975
ft2
h. Permitted Storage
24,200
49,881
24,835
16,502
Volume, ft3
i. Temporary Storage Elev.,
25
j 24.21
26
22.5
FMSL
j. Controlling Orifice, "0
2
3
1.5
1.5
pipe
k. Permitted Forebay
6,280
15,737
6,214
3,362
Volume, ft3
I. Receiving Stream/River
Rice Creek / Cape Fear
Basin
m. Stream Index Number
18-81-6
n. Classification of Water
C;Sw
Body
o. Max. fountain
1 /8
1 /4
1 /8
1 /8
horsepower
Page 5 of 12

State Stormwater Management Systems
Permit No. SW8 070333
SCHEDULE OF COMPLIANCE
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.
2. The permittee is responsible for monitoring the built -upon area on the project and must
maintain the built -upon area for the project at or below the permitted maximum allowed
by this permit. Once the individual lot transfer is complete, the built -upon area for that lot
may not be revised without approval from the DEMLR.
3. If an Architectural Review Board or Committee is required to review plans for compliance
with the BUA limit, the plans reviewed must include all proposed built -upon area. Any
approvals given by the Board do not relieve either the permittee or the homeowner of the
responsibility to maintain compliance with the permitted BUA limit for that lot.
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 6 months).
b. Sediment removal.
C. Mowing and revegetation of slopes and the vegetated filter.
d. Immediate repair of eroded areas.
e. Maintenance of all slopes in accordance with approved plans and specifications.
f. Debris removal and unclogging of bypass structure, infiltration media, flow
spreader, catch basins, piping and vegetated filter.
g. A clear access path to the bypass structure must be available at all times.
5. Records of maintenance activities must be kept and made available upon request to
authorized personnel of DEMLR. The records will indicate the date, activity, name of
person performing the work and what actions were taken.
6. Access to the stormwater facilities shall be maintained via appropriate easements at all
times.
7. 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.
8. The permittee shall submit to the Director and shall have received approval for revised
plans, specifications, and calculations prior to construction, for any modification to the
approved plans, including, but not limited to, those listed below:
a. Any revision to 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, acquisition, or sale of all or part of the project area. The
project area is defined as all property owned by the permittee, for which
Sedimentation and Erosion Control Plan approval or a LAMA Major permit was
sought.
f. Filling in, altering, or piping of any vegetative conveyance shown on the
approved plan.
9. The Director may determine that other revisions to the project should require a
modification to the permit.
Page 6of12

State Stormwater Management Systems
Permit No. SW8 070333
10. All stormwater collection and treatment systems must be located in either dedicated
common areas or recorded easements. The final plats for the project will be recorded
showing all such required easements, in accordance with the approved plans.
11 The Director may notify the permittee when the permitted site does not meet one or
more of the minimum requirements of the permit. Within the time frame specified in the
notice, the permittee shall submit a written time schedule to the Director for modifying
the site to meet minimum requirements. The permittee shall provide copies of revised
plans and certification in writing to the Director that the changes have been made.
12. The stormwater management system shall be constructed in its entirety, vegetated and
operational for its intended use prior to the construction of any built -upon surface.
13. During construction, erosion shall be kept to a minimum and any eroded areas of the
system will be repaired immediately.
14. 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.
15. If the stormwater system was used as an Erosion Control device, it must be restored to
design condition prior to operation as a stormwater treatment device, and prior to
occupancy of the facility.
16. Permanent seeding requirements for the stormwater control must follow the guidelines
established in the North Carolina Erosion and Sediment Control Planning and Design
Manual.
17. The permittee shall at all times provide the operation and maintenance necessary to
assure that all components of the permitted stormwater system function at optimum
efficiency. The approved Operation and Maintenance Plan must be followed in its
entirety and maintenance must occur at the scheduled intervals including, but not limited
to:
a. Semiannual scheduled inspections (every 6 months).
b. Sediment removal.
C. Mowing and revegetation of 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 structures, orifice, catch basins and piping.
g. Access to all components of the system must be available at all times.
18. Records of maintenance activities must be kept and made available upon request to
authorized personnel of DEMLR. The records will indicate the date, activity, name of
person performing the work and what actions were taken.
19. The facilities shall be constructed, operated and maintained in accordance with the
provisions of this permit, the approved plans and specifications, and the supporting
documents attached to this permit and on file with the Division.
20. Prior to transfer of the permit, the stormwater facilities will be inspected by DEMLR
personnel. The facility must be in compliance with all permit conditions. Any items not in
compliance must be repaired or replaced to design condition prior to the transfer.
Records of maintenance activities performed to date will be required.
Page 7 of 12

State Stormwater Management Systems
Permit No. SW8 070333
21. Decorative spray fountains will be allowed in the stormwater treatment system, subject
to the following criteria:
a. The fountain must draw its water from less than 2' below the permanent pool
surface.
b. Separated units, where the nozzle, pump and intake are connected by tubing, may
be used only if they draw water from the surface in the deepest part of the pond.
C. The falling water from the fountain must be centered in the pond, away from the
shoreline.
d. The maximum horsepower for the fountain's pump is based on the permanent pool
volume. The maximum pump power for a fountain in these ponds is described in
Sections 1.6 and 1.7 of this permit.
22. The following deed restriction statements must be recorded with the Office of the
Register of Deeds prior to the sale of any lot:
a. The following covenants are intended to ensure ongoing compliance with State
Stormwater Management Permit Number SW8 070333MOD, as issued by the
DEMLR 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, DEMLR.
e. Alteration of the drainage as shown on the approved plans may not take place
without the concurrence of the DEMLR.
f. The maximum built -upon area per lot is 3,000 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 and parking areas, but does not
include raised, open wood decking, or the water surface of swimming pools.
g. All runoff on the lot must drain into the permitted system. This may be
accomplished through providing roof drain gutters which drain to the street, grading
the lot to drain toward the street, or grading perimeter swales and directing them
into the pond or street. Lots that will naturally drain into the system are not required
to provide these measures.
h. Built -upon area in excess of the permitted amount will require a permit
modification.
23. A copy of the recorded deed restrictions must be submitted to the Division within 30
days of the date of recording the plat, and prior to selling lots. The recorded copy must
contain all of the statements above, the signature of the Permittee, the deed book
number and page, and the stamp/signature of the Register of Deeds.
24. Built upon area includes, but is not limited to, structures, asphalt, concrete, gravel, brick,
stone, slate, coquina and parking areas, but does not include raised, open wood
decking, or the water surface of swimming pools.
Page 8 of 12

State Stormwater Management Systems
Permit No. SW8 070333
III. GENERAL CONDITIONS
This permit is not transferable to any person or entity except after notice to and approval
by the Director. The permittee shall submit a completed and signed State Stormwater
Request Form for Permit Transfer or Permit Information Update, accompanied by the
supporting documentation as listed on the form, to the Division at least 60 days prior to
any one or more of the following events:
a. Any ownership change including:
i. The assignment of declarant rights to another individual or entity;
ii. The sale or conveyance of the common areas to a Homeowner's or
Property Owner's Association, subject to the requirements of Session
Law 2011-256;
iii. The sale or conveyance of the project area in whole or in part, except in
the case of an individual lot sale that is made subject to the recorded
deed restrictions and protective covenants;
iv. Dissolution of the partnership or corporate entity, subject to NCGS 57D-2-
01(e) and NCGS 57D-6-07;
b. Bankruptcy;
C. Foreclosure, subject to the requirements of Session Law 2013-121
d. A name change of the current permittee;
e. A name change of the project;
f. A mailing address change of the permittee;
2. The permittee is responsible for compliance with all of the terms and conditions of this
permit until such time as the Director approves the transfer request. Neither the sale of
the project area nor the conveyance of common area to a third parry constitutes an
approved transfer of the permit.
3. Failure to abide by the conditions and limitations contained in this permit may subject the
Permittee to enforcement action by the DEMLR, in accordance with North Carolina
General Statute 143-215.6A to 143-215.6C.
4. 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.
5. In the event that the facilities fail to perform satisfactorily, including the creation of
nuisance conditions, the Permittee shall take immediate corrective action, including
those as may be required by this Division, such as the construction of additional or
replacement stormwater management systems.
6. The permit may be modified, revoked and reissued or terminated for cause. The filing of
a request for a permit modification, revocation and reissuance or termination does not
stay any permit condition.
7. Permittee grants permission to staff of the DEMLR to access the property for the
purposes of inspecting the stormwater facilities during normal business hours.
8. A copy of the approved plans and specifications shall be maintained on file by the
Permittee for a minimum of ten years from the date of the completion of construction.
9. The permittee is responsible for compliance with all permit conditions until such time as
the Division approves the transfer request. Neither the sale of the project, in whole or in
part, nor the conveyance of common area to a third party constitutes an approved
transfer of the stormwater permit.
10. Any individual or entity found to be in noncompliance with the provisions of this
stormwater management permit or the requirements of the Stormwater rules is subject to
enforcement procedures as set forth in NCGS 143 Article 21.
Page 9 of 12

State Stormwater Management Systems
Permit No. SW8 070333
11 The permittee shall submit a permit renewal application request at least 180 days prior
to the expiration date of this permit. The renewal request must include the appropriate
documentation and the processing fee.
Permit corrected, extended and reissued this the 11th day of July 2018
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
For illiam E Toby) Vinson, Jr., PE, CPESC, CPM, Interim Director
Division of Energy, Mineral and Land Resources
By Authority of the Environmental Management Commission
Page 10 of 12

State Stormwater Management Systems
Permit No. SW8 070333
Rice Creek Plantation — Phase I
Stormwater Permit No. SW8 070333MOD
Brunswick County
Designer's Certification
Page 1 of 2
1, , as a duly registered in the State
of North Carolina, having been authorized to observe (periodically/weekly/full time) the
construction of the project,
(Project)
for (Project Owner) hereby state that, to the best of
my abilities, due care and diligence was used in the observation of the project construction such
that the construction was observed to be built within substantial compliance and intent of the
approved plans and specifications.
The checklist of items on page 2 of this form are a part of this Certification.
Noted deviations from approved plans and specifications:
Signature
Registration Number
Date
SEAL
Page 11 of 12

0
State Stormwater Management Systems
Permit No. SW8 070333
Certification Requirements: Page 2 of 2
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, a
forebay, and the vegetated filter.
15. The required dimensions of the system are provided, per the approved plan.
cc: NCDEQ-DEMLR Regional Office
Brunswick County Building Inspections
Page 12 of 12

Permit Number: JIiV�O �Q�
(to be provided by DWQ)
Drainage Area Number:
Wet Detention Basin Operation and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will be kept in a
log in a known set location. Any deficient BMP elements noted in the inspection will be
corrected, repaired or replaced immediately. These deficiencies can affect the integrity
of structures, safety of the public, and the removal efficiency of the BMP.
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):
® does ❑ does not incorporate a vegetated filter at the outlet. ��� 1. 7 2009
This system (check one):
❑ does ® does not incorporate pretreatment other than a forebay.
Important maintenance procedures:
- Immediately after the wet detention basin is established, the plants on the
vegetated shelf and perimeter of the basin should be watered twice weekly if
needed, until the plants become established (commonly six weeks)-
- No portion of the wet detention pond should be fertilized after the first initial
fertilization that is required to establish the plants on the vegetated shelf.
- Stable groundcover should be maintained in the drainage area to reduce the
sediment load to the wet detention basin.
- If the basin must be drained for an emergency or to perform maintenance, the
flushing of sediment through the emergency drain should be minimized to the
maximum extent practical.
- Once a year, a dam safety expert should inspect the embankment.
After the wet detention pond is established, it should be inspected once a month and
within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a
Coastal County). Records of operation and maintenance should be kept in a known set
location and must be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMP element:
Potentialproblem:
hose► I will remediate theproblem:
The entire BMP
Trash/debris is present.
Remove the trash/debris.
The perimeter of the wet
Areas of bare soil and/or
Regrade the soil if necessary to
detention basin
I erosive gullies have formed.
I remove the gully, and then plant a
cover and water until it is
esound
tablished. Provide h re and a
one-time fertilizer application.
Vegetation is too short or too
Maintain vegetation at a height of
long.
approximately six inches.
Form SW401-Wet Detention Basin O&M-Rev.4 Page 1 of 4

Permit Number:
(to be provided by DWQ)
Drainage Area Number:
BMP element:
Potentialproblem:
How I will remediate theproblem:
The inlet device: pipe or
swale
The pipe is clogged.
Unclog the pipe. Dispose of the
sediment off -site.
Replace the pipe.
The pipe is cracked or
otherwise damaged.
Erosion is occurring in the
swale.
Regrade the swale if necessary to
smooth it over and provide erosion
control devices such as reinforced
turf matting or riprap to avoid
future problems with erosion.
The forebay
Sediment has accumulated to
Search for the source of the
a depth greater than the
sediment and remedy the problem if
original design depth for
possible. Remove the sediment and
sediment storage.
dispose of it in a location where it
will not cause impacts to streams or
the BMP.
Erosion has occurred.
Provide additional erosion
protection such as reinforced turf
matting or riprap if needed to
revert future erosion problems.
Weeds are present.
Remove the weeds, preferably by
hand. If pesticide is used, wipe it on
the plants rather than spraying.
The vegetated shelf
Best professional practices
Prune according to best professional
show that pruning is needed
practices
to maintain optimal plant
health.
Plants are dead, diseased or
Determine the source of the
dying.
problem: soils, hydrology, disease,
etc. Remedy the problem and
replace plants. Provide a one-time
fertilizer application to establish the
ground cover if a soil test indicates
it is necessary.
Weeds are present.
Remove the weeds, preferably by
hand. If pesticide is used, wipe it on
the plants rather than spraying,
The main treatment area
Sediment has accumulated to
Search for the source of the
a depth greater than the
sediment and remedy the problem if
original design sediment
possible. Remove the sediment and
storage depth.
dispose of it in a location where it
will not cause impacts to streams or
the BMP.
Algal growth covers over
Consult a professional to remove
50 % of the area.
and control the algal growth.
Cattails, phragmites or other
Remove the plants by wiping them �
invasive plants cover 50 % of
with pesticide (do not spray). i
the basin surface.
Form SW401-Wet Detention Basin O&M-Rev.4 Page 2 of 4

Permit Number:
(to be provided by DWQ)
Drainage Area Number:
BMP element:
Potentialproblem:
How I will remediate theproblem:
The embankment
Shrubs have started to grow
on the embankment.
Remove shrubs immediately.
Evidence of muskrat or
Use traps to remove muskrats and
beaver activity is present.
consult a professional to remove
beavers.
A tree has started to grow on
I Consult a dam safety specialist to
the embankment.
remove the tree.
An annual inspection by an
Make all needed repairs.
appropriate professional
shows that the embankment
needs repair. if applicable)
The outlet device
Clogging has occurred.
Clean out the outlet device. Dispose
of the sediment off -site.
The outlet device is damaged
Repair or replace the outlet device.
The receiving water
Erosion or other signs of
Contact the local NC Division of
damage have occurred at the
Water Quality Regional Office, or
outlet.
the 401 Oversight Unit at 919-733-
1786.
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 10 feet in the main pond, the sediment
shall be removed.
When the permanent pool depth reads 10 feet in the forebay, the sediment
shall be removed.
Sediment Removal
Bottom
12 �]
FOREBAV
BASIN DIAGRAM
(fill in the blanks)
Eft Min.
Sediment
Storage
Permanent Pool Elevation 22.0
Pool
------Sediment Removal Elevation 12------------- Volume
-------------------- -------
Bottom Elevation
MAIN POND
1-ft
Storage
Form SW401-Wet Detention Basin O&M-Rev.4 Page 3 of 4

Permit Number:
(to be provided by DWQ)
I acknowledge and agree by my signature below that I am responsible for the
performance of the maintenance procedures listed above. I agree to notify DWQ of any
problems with the system or. prior to any changes to the system or responsible party.
Project name: Rice Creek - Phase I
BMP drainage area number: 9 - Pond #8
Print name: John Baker
Title: Member Manager, Brunswick STU & Associates LLC
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.
a Notary Public for the State of
I�„ ounty ofv,,n c C.�f. , do hereby certify that
personally appeared before me this
day f , �,b+v f , and acknowledge the due execution of the
forgoing wet detention basin maintenance requirements. Witness tray hand and official
seal,
VICKI MEYERS
NOTARY PUBLIC
BRUNSWICK COUNTY NC
My Commission Expires 11-14-2010
SEAL
My commission expires Is-iow
Form SW401-Wet Detention Basin O&M-Rev.4 Page 4 of 4

Permit No
(to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORM WATER MANAGEYMENT PERMIT APPLICATION FORM
LOW DENSITY SUPPLEMENT
This form may be photocopied for zue as an original
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 : Rice Creek Plantation — Phase 1 (Tract A S/F)
Contact Person: Brian Hall Bowman Design & Eng.) Phone Number: [phone]
Number of Lots: 175 Allowable Built Upon Area Per Lot*: 3,000 SF
*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.
H. 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 Pagel of2

Calculation:
(SA x DF) - RA — OA = BUA
No. Lots Lot
(2,671,785 x 0.30)—191,163 - 0 = 3,488 SF / Lot*
175
* Per the Rice Creek Plantation Master Stormwater Plan, lots 1-175 in Phase 1 are assigned 3,000 SF
of BUA, less than the maximum BUA of 3,488 SF calculated above. This results in a density factor
(DF) of 26.8% for Tract A.
III. 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.
Applicants Initials
a. A. 30 foot vegetative buffer is provided adjacent to surface waters. Projects in the Neuse
River basin may require additional buffers.
9SN 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.
c. Built upon area calculations are provided for the overall project and all lots.
'93]{ d. Project conforms to low density requirements within the ORW AEC (if applicable).
[15A NCAC 2H .1007(2)(b)]
Form SWU-104 Rev 3.99 Page 2 of 2

Permit No `✓-�'� j 3
(to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
CURB OUT LET SYSTEM SUPPLEMENT
FOR LOW DENSITY DEVELOPMENT WITH CURB AND GUTTER
This form may be photocopied for use as an original
DWO Stormwater Manaizemcnt PlanReview•
A complete stormwater management plan submittal includes a stormwater management permit application, a
curb outlet system supplement, a low density supplement, design calculations, and plans and specifications
showing all stormwater conveyances and curb outlet details.
I. PROJECT INFORMATION
Project Name: Rice Creek Plantation - Phase 1 (Thoroughfare)
Contact Person: David Bowman, PE (Bowman Design & Eng.) Phone Number: ( 910) 755-6526
Curb outlets to (check one): Swale 0 Vegetated Area
II. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the North Carolina Administrative Code Section 15A
NCAC 2H .1008.
Initial in the space provided to indicate that the following design requirements have been met and supporting
documentation is attached. If the applicant has designated an agent on the Stormwater Management Permit
Application Form, the agent may initial below. If a requirement has not been met, attach justification.
Applicants Initials
a. Curb outlets direct flow to a swale or vegetated area.
`z b. Swales or vegetated areas receiving curb outlet flow are designed to carry, at a minimum,
the peak flow from the 10-year storm.
c. Flow velocity is non -erosive for peak flow from the 10-year storm event.
d. Longitudinal slope of the swale or vegetated area does not exceed 5%.
e. Side slopes of the swale or vegetated area are no steeper than 5:1 (horizontal to vertical).
f. Length of swale or vegetated area is > 100 feet.
g. The system takes into account the run-off at ultimate built -out potential from all surfaces
draining to the system (delineate drainage area for each swale).
- h. Swages are located in recorded drainage easements.
�— i. Grass type(s) for permanent vegetative cover specified on detail.
j . Swale detail provided on plans.
AUG 0 8
Form SWU-105 Ver 3.99 Pagel of 3

III. , DESIGN INFORMATION
Complete the following table. If additional space is needed the information should be provided in the same
format as Table 1 and attached to this form. Rainfall intensity data can be found in Appendix 8.03 of the State
of North Carolina Erosion and Sediment Control Planning and Design Manual.
Table 1. Swale Design Information
Swale No.
I Drainage
Area (ac)
Impervious
Grassed
Area (ac)
C
Q
(cfs)
Va.
(fps)
Vim.,
(_fps)
Flow
Depth ,f?)
1
0.54
0.23
0.31
0.521
1.99
5
1.89
0.37
2
1.54
0.65
0.89
0.516
5.66
5
1.47
0.88
3
1.47
0.65
0.82
0.532
5.55
5
1.33
0.92
4
0.56
0.22
0.34
0.497
1.96
5
1.29
0.47
9
0.64
0.37
0.27
0.632
2.88
5
1.42
0.65
10
1.33
0.65
0.68
0.567
5.35
5
1.64
0.81
lla
1.07
0.50
0.57
0.552
4.18
5
1.17
0.85
llb
0.70
0.34
0.36
0.565
2.80
5
1.76
0.57
12
0.9i
0.46
0.45
0.581
3.74
5
1.65
0.67
13
0.81
0.45
0.36
0.615
3.55
5
1.99
0.60
14
1.51
0.67
0.84
0.533
5.71
5
1.56
0.86
15
1.26
0.55
0.71
0.526
4.72
5
1.50
0.80
16
0.36
0.17
0.19
0.553
1.42
5
1.23
0.48
17
0.46
0.20
0.26
0.525
1.72
5
0.96
0.61
18
0.78
0.35
0.43
0.538
2.97
5
1.09
0.65
19
0.99
0.49
0.50
0.573
4.01
5
2.44
0.49
20
0.86
0.38
0.48
0.533
3.24
5
1.07
0.69
21
0.95
0.45
0.50
0.557
3.74
5
2.18
0.50
22
1.20
0.53
0.67
0.532
4.52
5
1.64
0.74
23
0.74
0.31
0.43
0.516
2.70
5
1.55
0.59
24
1.02
0.32
0.70
0.435
3.15
5
1.11
0.76
25
0.18
0.09
0.09
0.579
0.74
5
1.20
0.35
i 26
0.21
0.13
0.08
0.664
0.99
5
1.53
0.36
27
0.99
0.30
0.69
0.428
3.01
5
1.19
0.72
Form SWU-105 Ver 3.99 Page 2 of 3
AUG 0 6 2010

Qug 03 10 06:44a BoWman Design & Engineeri 9107556527 p.3
IV. CURB OUTLET SYSTEM MAINTENANCE REQUIREMENTS
IREMENTS
1. Mowing will be accomplished as needed according to the season. Grass height will not exceed six inches
at any time.
2. Swales will be inspected montbly or after even, runoff producing rainfall event for sediment build-up,
erosion, and trash accuhiulation.
3. Acewnulated sediment! and tttsh will be removed as necessary. Swales will be reseeded or sodded
following sediment rer4:10val.
4. Eroded areas of the swales will be repaired and reseeded. Swales will be revegetated as needed and in a
timely manner based oil the monthly inspections.
5. Catch basins, curb cutsa Velocity reduction devices, and piping will be inspected montlly or after every
significant runoff prod icing rainfall event. Trash and debris will be cleared away from grates, curb cuts,
velocity reduction devices and piping.
6. Swales will not be altered, piped, or filled in without approval from NCDENR Division of Water Quality.
1 acknowledge and agree by my signature below that 1 can responsible for the performance of the six
maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to arty
changes to the system or responsible party.
Print Name and Title: John Baker
Address: PO Box 1980& Raleigh NC 27619
Phone: 919 - 4
.�.. Dater � .!
Signature:
Note: 1 ne legally re ibl ar0 should not be u horneowne►.s association unlese more than 50% of'the dots have been sold and a
rssldent cif me sub Isinn as Nen'named the president.
TA 1 / 6 k' LAe+✓ti+ _ , a Notary Public for the State of A/ Co CouulY of
do hereby certify that, �oy/VA l((,[� personally appeared before me this
day of ZOi V , and acknowledge the due execution of the farga Y infiltration basin maietenance
requirements. Witness my hand And official seal.
i
M. *** if
�0 TA
•�
SEAL
�z AUBL��';` V
Form S W U-105 Ver 3.99
h1y commission expires ®' I(e— Z O l V
Page 3 of 3
AUG 0 6 2010

Permit No. S w % D -7O'333
(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
DM 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: Rice Creek Plantation- Phase 1 (Pond 1)
Contact Person: Brian Hall Bowman Designg.) Phone Number: [phone]
For projects with multiple basins, specify which basin this worksheet applies to:
elevations
Basin Bottom Elevation 17.0ft. (floor of the basin)
Permanent Pool Elevation 23.0 ft. (elevation of the orifice)
Temporary Pool Elevation 25.0 ft. (elevation of the discharge structure overflow)
areas
Permanent Pool Surface Area 8,413 sq. ft. (water surface area at the orifice elevation)
Drainage Area 8.69 ac. (on -site and off -site drainage to the basin)
Impervious Area 4.31 ac. (on -site and off -site drainage to the basin)
volumes
Permanent Pool Volume
23.528
cu. ft.
(combined volume of main basin and forebay)
Temporary Pool Volume
19,560
cu. ft.
(volume detained above the permanent pool)
Forebay Volume
49,42
cu. ft.
(approximately 20% of total volume)
Other parameters
SA/DAi
0.0208
(surface area to drainage area ratio from .DWQ table)
Diameter of Orifice
I.50
in.
(2 to 5 day temporary pool draw -down required)
Design Rainfall
1.00
in.
Design TSS Removal 2
85
%
(minimum 85% required)
Form SwU-102 Rev 3.99
Page
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 % 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 Mer may be waived if the wet detention basin is designed to provide
90% TSS removal. The NCDENR BMP manual provides design tables for both 85% TSS removal and 90% TSS removal.
H. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Stormwater Best IVianagement 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
W 4 a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet).
&U b. The forebay volume is approximately equal to 20% of the basin volume.
WH c. The temporary pool controls runoff from the design storm event.
13 " d. The temporary pool draws down in 2 to 5 days.
gs N e. If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow
calculations)
13s 14 f. The basin length to width ratio is greater than 3:1.
8St4 g. The basin side slopes above the permanent pool are no steeper than 3:1.
6St-1 h. A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail)
9s" i. Vegetative cover above the permanent pool elevation is specified.
ES R 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.
B&H 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.
$St{ in. A mechanism is specified which will drain the basin for maintenance or an emergency.
III. WET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the
vegetated filter if one is provided.
This system (check one)`0 does 0 does not incorporate a vegetated filter at the outlet.
This system (check one) 0 doesY9 does not incorporate pretreatment other than a forebaym
Form SWU-102 Rev 3.99 Page 2 of 4

Maintenance activities shall be performed as follows:
1. After every significant runoff producing rainfall event and at least monthly:
a. Inspect the wet detention basin system for sediment accumulation, erosion, trash accumulation,
vegetated cover, and general condition.
b. Check and clear the orifice of any obstructions such that drawdown of the temporary pool occurs within
2 to 5 days as designed.
2. Repair eroded areas immediately, re -seed as necessary to maintain good vegetative cover, mow vegetative
cover to maintain a maximum height of six inches, and remove trash as needed.
3. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to maintain
proper functioning.
4. Remove accumulated sediment from the wet detention basin system semi-annually or when depth is
reduced to 75% of the original design depth (see diagram below). Removed sediment shall be disposed of
in an appropriate manner and shall be handled in a manner that will not adversely impact water quality (i.e.
stockpiling near a wet detention basin or stream, etc.).
The measuring device used to determine the sediment elevation shall be such that it will give an accurate
depth reading and not readily penetrate into accumulated sediments.
When the permanent pool depth reads _4.50 feet in the main pond, the sediment shall be removed.
When the permanent pool depth reads �4.50 feet in the forebay, the sediment shall be removed.
Sediment Removal El. J18.5_
Bottom E1e ation 17.0 2
FOREBAY
BASIN DIAGRAM
6,611 in the blanks)
Permanent Pool Elevation 23.0
- - - Sediment Removal Elevation 18.5 1 75%
------------------=---------
\ Bottom Elevation _17.0 25%/
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: John Raker
Title:
Addre:
Phone:
Signab
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, i6Atgti F jOar-orl , a Notary Public for the State of M� M COU"ll t-f--
County of 1QP,W 11A 6re4e- , do hereby certify that _
personally appeared before me this day of ;?�'t'o A4& 164�4
jeh , fj'Or ec,jc.
166-1 , and acknowledge the due
execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal,
j "o.R
o}iif •a V
a w
4
V U
SEAL
My commission expires
Form SWU-102 Rev 3.99 Page 4 of 4

Permit No. S2256070333
(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: Rice Creek Plantation — Phase 1 (Pond 2)
Contact Person: Brian Hall (Bowman Design & Fng. Phone Number: [phone]
For projects with multiple basins, specify which basin this worksheet applies to:
elevations
Basin Bottom Elevation 16.5 ft. (floor of the basin)
Permanent Pool Elevation 23.0 ft. (elevation of the orifice)
Temporary Pool Elevation 25.0 ft. (elevation of the discharge structure overflow)
areas
Permanent Pool Surface Area 8,716 sq. ft. (water surface area at the orifice elevation)
Drainage Area 319,410 ac. (on -site and off -site drainage to the basin)
Impervious Area 236,419 ac. (on -site and off -site drainage to the basin)
volumes
Permanent Pool Volume 24,060 cu.: t. (combined volume of main basin and forebay)
Temporary Pool Volume 20,251 cu. ft. (volume detained above the permanent pool)
Forebay Volume 4,780 cu. ft. (approximately 20% of total volume)
Other parameters
SA/DA1 0.0258 (surface area to drainage area ratio from DWQ table)
Diameter of Orifice 2.00 in. (2 to 5 day temporary pool draw -down required)
Design Rainfall 1.00 in.
Design TSS Removal 2 85 % (minimum 85% required)
Form SWU-102 Rev 3.99 Page 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 % 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
11 a following checklist outlines design requirerncnts per the Stormwater Best Management Practices ULanual
(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
FSH 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.
EK 1+ c. The temporary pool controls runoff from the design storm event.
BS 11 d. The temporary pool draws down in 2 to 5 days.
8s e. If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow
calculations)
135 4 f. The basin length to width ratio is greater than 3: 1.
664 g. The basin side slopes above the permanent pool are no steeper than 3:1.
P5 0 h. A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail).
8514 i. Vegetative cover above the permanent pool elevation is specified.
8S N 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.
ES kI 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.
85 4 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" does 0 does not incorporate a vegetated filter at the outlet.
This system (check one) 0 does 0 does not incorporate pretreatment other than a forebay.
Form SW-102 Rev 3.99 Page 2 of 4

Maintenance activities shall be performed as follows:
1. After every significant runoff producing rainfall event and at least monthly:
a. Inspect the wet detention basin system for sediment accumulation, erosion, trash accumulation,
vegetated cover, and general condition.
b. Check and clear the orifice of any obstructions such that drawdown of the temporary pool occurs within
2 to 5 days as designed.
2. Repair eroded areas immediately, re -seed as necessary to maintain good vegetative cover, mow vegetative
cover to maintain a maximum height of six inches, and remove trash as needed.
3. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to maintain
proper functioning.
4. Remove accumulated sediment from the wet detention basin system semi-annually or when depth is
reduced to 75% of the original design depth (see diagram below). Removed sediment shall be disposed of
in an appropriate manner and shall be handled in a manner that will not adversely impact water quality (i.e.
stockpiling near a wet detention basin or stream, etc.).
The measuring device used to determine the sediment elevation shall be such that it will give an accurate
depth reading and not readily penetrate into accumulated sediments.
When the permanent pool depth reads J4.875_ feet in the main pond, the sediment shall be removed.
When the permanent pool depth reads 4.875 feet in the forebay, the sediment shall be removed.
Sediment Rei4oval El. J18.125
Bottom Elation _16.5 ? 2�
FOREBAY
BASIN DIAGRAM
ill in the blanks)
Permanent Pool Elevation 23.0
Sediment Removal Elevation 18.125 L --75%0 -
Bottom Elevation 16.5
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.
z . fol T1 1 O.
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, Pam I a Notary Public for the State of A/Yfk C,amlxe--
County of ry&,u 44an Me4 , do hereby certify that J6I41J &Lt4K-
personally appeared before me this day of _Z'U"" OL , 7i40-7 , and acknowledge the due
execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal,
•--. J'� ��� � irk o �?
U '
SEAL
My commission expires
Form SWU-102 Rev 3.99 Page 4 of 4

Permit No. SWtO'7n '337�
(to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
WET DETENTION BASIN SUPPLEMENT
This form may be photocopied for use as an original
DWQ Stormwater Management Plan Review:
A complete stormwater management plan submittal includes an application form, a wet detention basin
supplement for each basin, design calculations, and plans and specifications showing all basin and outlet
structure details.
I. PROJECT INFORMATION
Project Name: Rice Creek Plantation —Phase 1 (Pond.3)
Contact Person: Brian Hall (Rawman Design & Fn _l Phone Number: [phone]
For projects with multiple basins, specify which basin this worksheet applies to:
elevations
Basin Bottom Elevation 17.0 ft. (floor of the basin)
Permanent Pool Elevation 23.0 ft. (elevation of the orifice)
Temporary Pool Elevation 25.0 ft. (elevation of the discharge structure overflow)
areas
Permanent Pool Surface Area
Drainage Area
Impervious Area
volumes
Permanent Pool Volume
Temporary Pool Volume
Forebay Volume
Other parameters
SA/DAi
Diameter of Orificc
Design Rainfall
Design TSS Removal 2
10,408 sq. ft.(water surface area at the orifice elevation)
554,482 ac. (on -site and off -site drainage to the basin)
178,739 ac. (on -site and off -site drainage to the basin)
30,579 cu. ft. (combined volume of main basin and forebay)
23,893 cu. ft. (volume detained above the permanent pool)
6,110 cu. ft. (approximately 20% of total volume)
0.0137 (surface area to drainage area ratio from DWQ table)
1.50 in. (2 to 5 day temporary pool draw -down required)
1.00 in.
85 % (minimum 85% required)
Form SWU-102 Rev 3.99 Page 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 % 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 NCDF.NR BUT manual provides design tables for both 85% TSS removal and 90% TSS removal.
H. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Stormwater Best Management Practices Manual
(N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code
Section: 15 A NCAC 2H .1008.
Initial in the space provided to indicate the following design requirements have been met and supporting
documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit
Application Form, the agent may initial below. If a requirement has not been met, attach justification.
Applicants Initials
85 H a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet).
BSA b. The forebay volume is approximately equal to 20% of the basin volume.
024 c. The temporary pool controls runoff from the design storm event.
BS14 d. The temporary pool draws down in 2 to 5 days.
QS�4 e. If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow
calculations)
1354 f. The basin length to width ratio is greater than 3: 1.
�t4 g. The basin side slopes above the permanent pool are no steeper than 3:1.
BS 44 h. A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail).
S& R i. Vegetative cover above the permanent pool elevation is specified.
SS44 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.
IWA 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.
q m. A mechanism is specified which will drain the basin for maintenance or an emergency.
III. WET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
The wct detention basin system is defined as the wet detention basin, pret eatiitent including forebays and the
vegetated filter if one is provided.
This system (check one) 0 does 0 does not incorporate a vegetated filter at the outlet.
This system (check one) 0 doe3.0 does not incorporate pretreatment other than a forebay.
Form SWU-102 Rev 3.99 Page 2 of 4

Maintenance activities shall be performed as follows:
1. After every significant runoff producing rainfall event and at least monthly:
a. Inspect the wet detention basin system for sediment accumulation, erosion, trash accumulation,
vegetated cover, and general condition.
b. Check and clear the orifice of any obstructions such that drawdown of the temporary pool occurs within
2 to 5 days as designed.
2. Repair eroded areas immediately, re -seed as necessary to maintain good vegetative cover, mow vegetative
cover to maintain a maximum height of six inches, and remove trash as needed.
3. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to maintain
proper functioning.
4. Remove accumulated sediment from the wet detention basin system semi-annually or when depth is
reduced to 75% of the original design depth (see diagram below). Removed sediment shall be disposed of
in an appropriate manner and shall be handled in a manner that will not adversely impact water quality (i.e.
stockpiling near a wet detention basin or stream, etc.).
The measuring device used to determine the sediment elevation shall be such that it will give an accurate
depth reading and not readily penetrate into accumulated sediments.
When the permanent pool depth reads _4.50 feet in the main pond, the sediment shall be removed.
When the permanent pool depth reads _4.50 feet in the forebay, the sediment shall be removed.
BASIN DIAGRAM
(fill in the blanks)
Permanent Pool Elevation 23.0
Sediment R oval El. �18.5_ 750
Sediment Removal Elevation �18.5 75 /o
' o
-------------- --- —
Bottom Ele ation_17.0_ 2 /o----"'---------------------------- -------
Bottom Elevation _17.0 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: John Baker
Title:
Addre
Phone
Signa
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, LA4-hxati F Ph"in , a Notary Public for the State of Ca"I me -- ,
County of NeW -HGWI OVI* , do hereby certify that J6" C,C
personally appeared before me this day of AO-�' A&Y'C4' , 2Da- , and acknowledge the due
execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal,
_o•
NoTAR S • O_
fl
PUBLIC. a ��
o \
• ® V
y` yt
SEAL
My commission expires - fiawiL—.
.'9 0 /( W If
Form SWU-102 Rev 3.99 Page 4 of 4

Permit No. 5 Wt b 7 0 3''S3
(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: Rice Creek Plantation— Phase 1 (Pond 4)
Contact Person: Brian Hall (Bowman Design & Eng_) Phone Number: [phone]
For projects with multiple basins, specify which basin this worksheet applies to:
elevations
Basin Bottom Elevation
13.5
ft.
(floor of the basin)
Permanent Pool Elevation
20.0
ft.
(elevation of the orifice)
Temporary Pool Elevation
22.0
ft.
(elevation of the discharge structure overflow)
areas
Permanent Pool Surface Area
12,288
sq. ft.
(water surface area at the orifice elevation)
Drainage Area
486,629
ac.
(on -site and off -site drainage to the basin)
Impervious Area
242,219
ac.
(on -site and off -site drainage to the basin)
volumes
Permanent Pool Volume
39,701
cu. ft.
(combined volume of main basin and forebay)
Temporary Pool Volume
27,917
cu. ft.
(volume detained above the permanent pool)
Forebay Volume
7,913
cu. ft.
(approximately 20% of total volume)
Other parameters
SA/DAi 0.0179 (surface area to drainage area ratio from DWQ table)
Diameter of Orifice 2.00 in. (2 to 5 day temporary pool draw -down required)
Design Rainfall 1.00 in.
Design TSS Removal 2 85 % (minimum 85% required)
Form SWU-102 Rev 3.99 Page 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 % 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.
H. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Stormwater Best Management Practices Manual
(N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code
Section: 15 A NCAC 2H .1008.
Initial in the space provided to indicate the following design requirements have been met and supporting
documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit
Application Form, the agent may initial below. If a requirement has not been met, attach justification.
Applicants Initials
T60 a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet).
135 b. The forebay volume is approximately equal to 20% of the basin volume.
BSt+ c. The temporary pool controls runoff from the design storm event.
0644 d. The temporary pool draws down in 2 to 5 days.
B544 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.
f35 H 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).
�S N i. Vegetative cover above the permanent pool elevation is specified.
Imo— 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.
egf4 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.
8614 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)'a d eses 0 does not incorporate a vegetated filter at the outlet.
This system (check one) 0 does does does not incorporate pretreatment other than a forebay.
Form SWU-102 Rev 3.99 Page 2 of 4

Maintenance activities shall be performed as follows:
1. After every significant runoff producing rainfall event and at least monthly:
a. Inspect the wet detention basin system for sediment accumulation, erosion, trash accumulation,
vegetated cover, and general condition.
b. Check and clear the orifice of any obstructions such that drawdown of the temporary pool occurs within
2 to 5 days as designed.
2. Repair eroded areas immediately, re -seed as necessary to maintain good vegetative cover, mow vegetative
cover to maintain a maximum height of six inches, and remove trash as needed.
3. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to maintain
proper functioning.
4. Remove accumulated sediment from the wet detention basin system semi-annually or when depth is
reduced to 75% of the original design depth (see diagram below). Removed sediment shall be disposed of
in an appropriate manner and shall be handled in a manner that will not adversely impact water quality (i.e.
stockpiling near a wet detention basin or stream, etc.).
The measuring device used to determine the sediment elevation shall be such that it will give an accurate
depth reading and not readily penetrate into accumulated sediments.
When the permanent pool depth reads �4.875_ feet in the main pond, the sediment shall be removed.
When the permanent pool depth reads _4.875 feet in the forebay, the sediment shall be removed.
Sediment Rehqoval El. �15.125
Bottom Ele ation
FOREBAY
BASIN DIAGRAM
6ri11 in the blanks)
Permanent Pool Elevation 20.0
=
- - - Sediment Removal Elevation 15.125 ♦ 75%
------------------------
Bottom Elevation 13.5 25%
i
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 SVX-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: John Baker
Tit.1e: .
Addre:
Phone:
Signath
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, J�—&-f'hgVA F. lO"n , a Notary Public for the State of A16M Oa e41 t 4L�
County of A/W +t 4 fLOVZo—f , do hereby certify that c,1 d h�Yl 6
personally appeared before me this day of �' d1 , and acknowledge the due
execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal,
O YC�>r�i9
NOTARY
• UBLIC O
0 0 ••a
o
eyeIN
'. aaa
SEAL
My commission expires -
«- 94-1 r/
Form SW-102 Rev 3.99 Page 4 of 4

Permit No. SW% 076 �'S3
(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: Rice Creek Plantation— Phase 1 (Pond 5)
Contact Person: Brian Hall (Bowman Design & Fng-) Phone Number: [phone]
For projects with multiple basins, specify which basin this worksheet applies to:
elevations
Basin Bottom Elevation 13.0 ft. (floor of the basin)
Permanent Pool Elevation 19.0 ft. (elevation of the orifice)
Temporary Pool Elevation 21.0 ft. (elevation of the discharge structure overflow)
areas
Permanent Pool Surface Area 7,154 sq. ft. (water surface area at the orifice elevation)
Drainage Area 198,391 ac. (on -site and off -site drainage to the basin)
Impervious Area 92,613 ac. (on -site and off -site drainage to the basin)
volumes
Permanent Pool Volume 17,579 cu. ft. (combined volume of main basin and forebay)
Temporary Pool Volume 16,863 cu. ft. (volume detained above the permanent pool)
Forebay Volume 3,482 cu. ft. (approximately 20% of total volume)
Other parameters
SA/DAi 0.0193 (surface area to drainage area ratio from DWQ table)
Diameter of Orifice _1.00 in. (2 to 5 day temporary pool draw -down required)
Design Rainfall 1.00 in.
Design TSS Removal 2 85 % (minimum 85% required)
Form SW-102 Rev 3.99 Page 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 % 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
900% 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).
A9 4 b. The forebay volume is approximately equal to 20% of the basin volume.
Gs 4 c. The temporary pool controls runoff from the design storm event.
136ti d. The temporary pool draws down in 2 to 5 days.
G614 e. If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow
calculations)
664 f. The basin length to width ratio is greater than 3:1.
QsA g. The basin side slopes above the permanent pool are no steeper than 3:1.
135t4 h. A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail).
1354} i. Vegetative cover above the permanent pool elevation is specified.
6614 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.
P614 m. A mechanism is specified which will drain the basin for maintenance or an emergency.
III. WET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
The we detention basin system is defined as the wet detention basin, pretreatment including forebays and the
vegetated ixlter if one is provided.
This system (check one)`0 does 0 does not incorporate a vegetated filter at the outlet.
This system (check one) 0 does 8 does not incorporate pretreatment other than a forebay.
Form SWU-102 Rev 3.99 Page 2 of 4

Maintenance activities shall be performed as follows:
1. After every significant runoff producing rainfall event and at least monthly:
a. Inspect the wet detention basin system for sediment accumulation, erosion, trash accumulation,
vegetated cover, and general condition.
b. Check and clear the orifice of any obstructions such that drawdown of the temporary pool occurs within
2 to 5 days as designed.
2. Repair eroded areas immediately, re -seed as necessary to maintain good vegetative cover, mow vegetative
cover to maintain a maximum height of six inches, and remove trash as needed.
3. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to maintain
proper functioning.
4. Remove accumulated sediment from the wet detention basin system semi-annually or when depth is
reduced to 75% of the original design depth (see diagram below). Removed sediment shall be disposed of
in an appropriate manner and shall be handled in a manner that will not adversely impact water quality (i.e.
stockpiling near a wet detention basin or stream, etc.).
The measuring device used to determine the sediment elevation shall be such that it will give an accurate
depth reading and not readily penetrate into accumulated sediments.
When the permanent pool depth reads �4.50 feet in the main pond, the sediment shall be removed.
When the permanent pool depth reads 4.50 feet in the forebay, the sediment shall be removed.
Sediment Removal El. _14.5
Bottom EWN tion �1iy f 2
FOREBAY
BASIN DIAGRAM
(fill in the blanks)
Permanent Pool Elevation J19.00
Sediment Removal Elevation 14.51 75% _- - - - -- - -
Bottom Elevation �13.0_ 1 25%
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: John Baker
Title:
Addre;
Phone;
Signat
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, i,Agyl2 r Aeon , a Notary Public for the State of ffa- Dl Cae61iA"C-- ,
County of P Ut 41�kt bV&e- , do hereby certify that je kn
personally appeared before me this day of 2 O -641 , 213-7 , and acknowledge the due
execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal,
VMOTo-' RY o +
PUBLIC .Cif
SEAL
My commission expires �ga�f wkrL--
/,)-• QA� /I j V
Form SW-102 Rev 3.99 Page 4 of 4

Permit No. Sv.?-,6/(7.7C�, 3375
(to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
WET DETENTION BASIN SUPPLEMENT
This form may be photocopied for use as an original
DWQ Stormwater Management Plan Review:
A complete stormwater management plan submittal includes an application form, a wet detention basin
supplement for each basin, design calculations, and plans and specifications showing all basin and outlet
structure details.
I. PROJECT INFORMATION
Project Name: Rice Creek Plantation— Phase 1 (Pond 6)
Contact Person: Brian Hall (Bowman 17esig & Rn 1 Phone Number: [phone]
For projects with multiple basins, specify which basin this worksheet applies to:
elevations
Basin Bottom Elevation
Permanent Pool Elevation
Temporary Pool Elevation
areas
Permanent Pool Surface Area
Drainage Area
Impervious Area
volumes
Permanent Pool Volume
Temporary Pool Volume
Forebay Volume
Other parameters
sa.mA1
Diameter of Orifice
Design Rainfall
Design TSS Removal 2
20.0
ft. (floor of the basin)
24.0
ft. (elevation of the orifice)
25.0
ft. (elevation of the discharge structure overflow)
5,502
sq. ft. (water surface area at the orifice elevation)
121,564
ac. (on -site and off -site drainage to the basin)
50,094
ac. (on -site and off -site drainage to the basin)
10,228 cu. ft. (combined volume of main basin and forebay)
6,096 cu. ft. (volume detained above the permanent pool)
1,946 cu. ft. (approximately 20% of total volume)
0.0268 (surface area to drainage area ratio from DWQ table)
1.00 in. (2 to 5 day temporary pool draw -down required)
1.00 in.
85 % (minimum 85% required)
Form SWU-102 Rev 3.99 Page 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 % 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.
H. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Stormwater Best Management Practices Manual
(N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code
Section: 15 A NCAC 2H .1008.
Initial in the space provided to indicate the following design requirements have been met and supporting
documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit
Application Form, the agent may initial below. If a requirement has not been met, attach justification.
Applicants Initials
ASSH a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet).
A614 b. The forebay volume is approximately equal to 20% of the basin volume.
BSB c. The temporary pool controls runoff from the design storm event.
$5H d. The temporary pool draws down in 2 to 5 days.
6644 e. If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow
calculations)
% H f. The basin length to width ratio is greater than 3:1.
654 g. The basin side slopes above the permanent pool are no steeper than 3:1.
0611 h. A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail).
6sil i. Vegetative cover above the permanent pool elevation is specified.
66 A 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.
es ft 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.
544 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 fofebays and the
vegetated filter if one is provided.
This system (check one) t does 0 does not incorporate a vegetated filter at the outlet.
This system (check one) 0 doe�0 does not incorporate pretreatment other than a forebay.
Form SWU-102 Rev 3.99 Page 2 of 4

Maintenance activities shall be performed as follows:
1. After every significant runoff producing rainfall event and at least monthly:
a. Inspect the wet detention basin system for sediment accumulation, erosion, trash accumulation,
vegetated cover, and general condition.
b. Check and clear the orifice of any obstructions such that drawdown of the temporary pool occurs within
2 to 5 days as designed.
2. Repair eroded areas immediately, re -seed as necessary to maintain good vegetative cover, mow vegetative
cover to maintain a maximum height of six inches, and remove trash as needed.
3. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to maintain
proper functioning.
4. Remove accumulated sediment from the wet detention basin system semi-annually or when depth is
reduced to 75% of the original design depth (see diagram below). Removed sediment shall be disposed of
in an appropriate manner and shall be handled in a manner that will not adversely impact water quality (i.e.
stockpiling near a wet detention basin or stream, etc.).
The measuring device used to determine the sediment elevation shall be such that it will give an accurate
depth reading and not readily penetrate into accumulated sediments.
When the permanent pool depth reads 3.00 feet in the main pond, the sediment shall be removed.
When the permanent pool depth reads _3.00 feet in the forebay, the sediment shall be removed.
Sediment ReiXoval El. 21.0
Bottom Ele ation 2 .0 2
FOREBAY
BASIN DIAGRAM
ill in the blanks)
Permanent Pool Elevation 24.0
Sediment Removal Elevation __ -21.0♦ 75%
- - -
Bottom Elevation N.O I 25%
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: John Raker
Title:
Address:
Phone:
Note: The legally responsible party should not be a homeowners association unless more than 501/o of the lots have been sold and a
resident of the subdivision has been named the president. /�
I, 1! Ga4 tvl l F.l 1 /7 , a Notary Public for
�the State of N D-th 0a"I t s ,
County of 11 / ei v -%�4n A1� , do hereby certify that d vh n jelal�e 4.
personally appeared before me this day of - M4"� "6 -7 , and acknowledge the due
execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal,
NOTARY
PUBLIC
SEAL
My commission expires
a-. gq ll
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 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: Rice Creek Plantation— Phase 1 (Pond 7)
Contact Person: Brian Hall (Bowman Design &. F.ng. Phone Number: [phone]
For projects with multiple basins, specify which basin this worksheet applies to:
elevations
Basin Bottom Elevation 17.0 ft. (floor of the basin)
Permanent Pool Elevation 23.0 ft. (elevation of the orifice)
Temporary Pool Elevation 25.0 ft. (elevation of the discharge structure overflow)
areas
Permanent Pool Surface Area 10534 sq. ft. (water surface area at the orifice elevation)
Drainage Area 452.857 ac. (on -site and off -site drainage to the basin)
Impervious Area 235,591 ac. (on -site and off -site drainage to the basin)
volumes
Permanent Pool Volume 30,881 cu. ft. (combined volume of main basin and forebay)
Temporary Pool Volume 24,200 cu. ft. (volume detained above the permanent pool)
Forebay Volume 6,280 cu. ft. (approximately 20% of total volume)
Other parameters
SA/DAZ 0.0220 (surface area to drainage area ratio from DWQ table)
Diameter of Orifice 2.00 in. (2 to 5 day temporary pool draw -down required)
Design Rainfall 1.00 in.
Design TSS Removal 2 85 % (minimum 85% required)
Form SWU-102 Rev 3.99 Page 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 % 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 BUT manual provides design tables for both 85% TSS removal and 90% TSS removal.
H. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Stormwater Best Management Practices Manual
(N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code
Section: 15 A NCAC 2H .1008.
Initial in the space provided to indicate the following design requirements have been met and supporting
documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit
Application Form, the agent may initial below. If a requirement has not been met, attach justification.
Applicants Initials
IgS-0 a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet).
gS H b. The forebay volume is approximately equal to 20% of the basin volume.
f3S R c. The temporary pool controls runoff from the design storm event.
19614 d. The temporary pool draws down in 2 to 5 days.
l-ttt e. If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow
calculations)
asti f. The basin length to width ratio is greater than 3:1.
3C4 g. The basin side slopes above the permanent pool are no steeper than 3:1.
& H h. A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail).
BS 14 i. Vegetative cover above the permanent pool elevation is specified.
BS14 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.
BS H 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.
1&54 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)-1 does 0 does not incorporate a vegetated filter at the outlet.
This system (check one) 0 does"st does not incorporate pretreatment other than a forebay.
Form SWU-102 Rev 3.99 Page 2 of 4

Maintenance activities shall be performed as follows:
1. After every significant runoff producing rainfall event and at least monthly:
a. Inspect the wet detention basin system for sediment accumulation, erosion, trash accumulation,
vegetated cover, and general condition.
b. Check and clear the orifice of any obstructions such that drawdown of the temporary pool occurs within
2 to 5 days as designed.
2. Repair eroded areas immediately, re -seed as necessary to maintain good vegetative cover, mow vegetative
cover to maintain a maximum height of six inches, and remove trash as needed.
3. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to maintain
proper functioning.
4. Remove accumulated sediment from the wet detention basin system semi-annually or when depth is
reduced to 75% of the original design depth (see diagram below). Removed sediment shall be disposed of
in an appropriate manner and shall be handled in a manner that will not adversely impact water quality (i.e.
stockpiling near a wet detention basin or stream, etc.).
The measuring device used to determine the sediment elevation shall be such that it will give an accurate
depth reading and not readily penetrate into accumulated sediments.
When the permanent pool depth reads J4.50 feet in the main pond, the sediment shall be removed.
When the permanent pool depth reads 4.50 feet in the forebay, the sediment shall be removed.
Sediment R*oval El. _18.5
Bottom Elation �17.0 2
FOREBAY
BASIN DIAGRAM
67111 in the blanks)
Permanent Pool Elevation 23.0
Sediment Removal Elevation _18.5_ �, 75%
Bottom Elevation J17.0 I 25%
_ y �
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: John Baker
Titic:
Addre:
Phone:
Signab
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, lz-'�4A"4 F. Pa4r/-'J , a Notary Public for the State of /IlOL fh CG��J���c c•
County of IU9uI f'IR,O a v , do hereby certify that J thii .xLkee—
personally appeared before me this day of ZU� ZOD"7 , and acknowledge the due
execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal,
• •.� � J'' La'/1 Y
NOTARY °
° PUBLIC ° �=
o `
O O PPa�•CC,..�y
SEAL
My commission expiresIo
Form SWU-102 Rev 3.99 Page 4 of 4

Permit No�� f--Jy
(rb be provided by DWQ)
of wnrE9
O� 'G
NCDENR r O�� Y
S70RMWA?ER MANAGEMENT PERM!? APPLICATION FARM
401 CERTIFICATION APPLICATION FORM
WET DETENTION BASIN SUPPLEMENT
This form must be tilled out, printed and submitted.
The Required teems Checklist (Pad Al; must Cc printed, tilled out and submitted sAoM *0 all of the requited Information.
!. PRO.tfs.,'C"I' fN +NRMATM
Project name Rice Creek Plantation - Phase 1
Contact person David Bowman (Bowman Design & Engineering Services, PA)
Phone number [phone]
Date 2-Aug-10
Drainage area number 9 - Pond 8
li. DEsiGN INFORMATION
Site Characteristics
Drainage area
Impervious area, post -development
% impervious
Design rainfall depth
Storage Volume: Non -SA Waters
Minimum volume required
Volume provided
Storage Volume: SA Waters
1.5" runoff volume
Pre -development 1-yr, 24-hr runoff
Post -development 1-yr, 24-hr runoff
Minimum volume required
Volume provided
Peak Plow Calculations
Is the pre/post control of the 1yr 24hr storm peak flow required?
1-yr, 24-hr rainfall depth
Rational C, pre -development
Rational C, past -development
Rainfall intensity: 1 -yr, 24-hrstorm
Pre -development 1-yr, 24-hr peak flow
Post -development 1-yr, 24-hr peak flow
Pre/Post 1-yr, 24-hr peak flow control
Elevations
Temporary pool elevation
Permanent pool elevation
SHWT elevation (approx. at the pens. pool elevation)
Top of 1 Oft vegetated shelf elevation
Bottom of 1 Oft vegetated shelf elevation
Sediment cleanout, top elevation (bottom of pond)
Sediment cleanout, bottom elevation
Sediment storage provided
Is there additional volume stored above the state -required temp. pool?
Elevation of the top of the additional volume
Form SW401-Wet Detention Basin-Rev.8-9/17/09
693,766 fez
275,779 fez
39.75 %
1.5 in
35,362 fe OK
49,881 fe OK, volume provided is equal to or in excess of volume required.
if
to
to
ft
ft
Y (Y or N)
3.9 in
0.20 (unitless)
0.50 (unitless)
0.20 in/hr OK
0.50 if/sec
1.30 f0isec
0.80 fe/sec
24.21 fmsl
22.00 hsl
_finsl
22.60 fmsl
21.50 final
12.00 final
10.00 fins!
2.00 ft
(Y or N)
24.2 fmsl OK
Parts I. & II. Design Summary, Page 1 of 2
AUG 0 6 MID

Permit
(to be provided by DKq
li. WOIMT5
Surface Areas
Area, temporary pool 25,213 f?
Area REQUIRED, permanent pool 16,789 ft
SAIDA ratio 2 42 (unifless)
Area PROVIDED, permanent pool, Ap m__pw
17,987 ft OK
Area, bottom of 10ft vegetated shelf, "nor
15,120 fe
Area, sediment cleanout, top elevation (bottom of pond), AW_,nd
1,990 fe
Volumes
Volume, temporary pool
49,881 fe
OK
Volume, permanent pool, Vim,,, w
79,470 fL3
Volume, forebay (sum of forebays if more than one forebay)
15,737 f?
Forebay % of permanent pool volume
19.8% %
OK
SAIDA Table Data
Design TSS removal
85 %
Coastal SAIDA Table Used?
y (Y or N)
MountaintPledmont SAIDA Table Used?
n (Y or N)
SAIDA ratio
2.42 (unitless)
Average depth (used in SAIDA table):
Calculation option 1 used? (See Figure 10-2b)
n (Y or N)
Volume, permanent pool, V,,,,,y„ i
79,470 fP
Area provided, permanent pool, Ap�,,,_„i
17,987 ly
Average depth calculated
4.42 ft
OK
Average depth used in SAIDA, da (Round to nearest 0.5ft)
4.4 ft
OK
Calculation option 2 used? (See Figure 10-2b)
n (Y or N)
Area provided, permanent pool, Ap.,,,,
17,987 fe
Area, bottom of 1 Oft vegetated shelf, Abu i fig
15,120 ft
Area, sediment cleanout, top elevation (bottom of pond), Abd_p.d
1,990 fe
"Depth" (distance blw bottom of 1Oft shelf and top of sediment)
9.50 ft
Average depth calculated
4.42 ft
OK
Average depth used in SAIDA, dN, (Round to nearest 0.5ft)
4.4 ft
OK
Drawdown Calculations
Drawdown through orifice?
y (Y or N)
Diameter of orifice (if circular)
3.00 in
Area of orifice (if--non-circular)
in'
Coefficient of discharge (Co)
0.60 (unitless)
Drivinn head (H_1
0 69 ft
Drawdown through weir?
n (Y or N)
Weir type
(unitless)
Coefficient of discharge (C,)
(unitless)
Length of weir (L)
ft
Driving head (H)
ft
Pre -development 1-yr, 24-hr peak flow
0.50 fe/sec
Past -development 1-yr, 24-hr peak flow
1.30 110/sec
Storage volume discharge rate (through discharge orifice or weir)
0.20 fe/sec
Storage volume drawdown time
4.00 days
OK, draws down in 2-5 days.
Additional Information
Vegetated side slopes
3 :1
OK
Vegetated shelf slope
10 :1
OK
Vegetated shelf width
10.0 ft
OK
Length of flowpath to width ratio
3 :1
OK
Length to width ratio
3.0 :1
OK
Trash rack for overflow ✓£ orifice?
y (Y or N)
OK
Freeboard provided
2.8 ft
OK
Vegetated filter provided?
y (Y or N)
OK
Recorded drainage easement provided?
y (Y or N)
OK
Capures all runoff at ultimate build -out?
y (Y or N)
OK
Drain mechanism for maintenance or emergencies is:
4" plug in outlet structure
Form SW401-Wet Detention Basin-Rev.8-9/17/09 Parts I. & II. Design Summary, Page 2 of 2
AUG 0 6 '9010

Permit No. Sw$`a 7 0 33?
(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: Rice Creek Plantation — Phase 1 (Pond 9)
Contact Person: Brian Hall (Bowman nevi gn & F.na 1 Phone Number: [phone]
For projects with multiple basins, specify which basin this worksheet applies to:
elevations
Basin Bottom Elevation 18.0 ft. (floor of the basin)
Permanent Pool Elevation 24.0 ft. (elevation of the orifice)
Temporary Pool Elevation 26.0 ft. (elevation of the discharge structure overflow)
areas
Permanent Pool Surface Area 10,792 sq. ft. (water surface area at the orifice elevation)
Drainage Area 359,755 ac. (on -site and off -site drainage to the basin)
Impervious Area 157,355 ac. (on -site and off -site drainage to the basin)
volumes
Permanent Pool Volume 30,064 cu. ft. (combined volume of main basin and for. ebay)
Temporary Pool Volume 24,835 cu. ft. (volume detained above the permanentpool)
Forebay Volume 6,214 cu. ft. (approximately 20% of total volume)
Other parameters
SA/DA1 0.0179 (surface area to drainage area ratio from DWQ table)
Diameter of Orifice l _ 50 in. (2 to 5 day temporary pool draw -down required)
Design Rainfall 1.00 in.
Design TSS Removal 2 85 % (minimum 85% required)
Form SWU-102 Rev 3.99 Page 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 % 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 ?nanual 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
856 a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet).
A.S H b. The forebay volume is approximately equal to 20% of the basin volume.
BS H c. The temporary pool controls runoff from the design storm event.
1-24 4 d. The temporary pool draws down in 2 to 5 days.
13SN e. If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow
calculations)
f § 14 — f. The basin length to width ratio is greater than 3:1.
R - g. The basin side slopes above the permanent pool are no steeper than 3:1.
BS + h. A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail).
1S1+ i. Vegetative cover above the permanent pool elevation is specified.
960 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.
INN 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.
III. WET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
The wet detention basin system is defined as the wet detention basin, pret^ieatment including iorebays and the
vegetated filter if one is provided.
This system (check one) `0 does 0 does not incorporate a vegetated filter at the outlet.
This system (check one) 0 does 0 does not incorporate pretreatment other than a forebay.
Form SWU-102 Rev 3.99 Page 2 of 4

Maintenance activities shall be performed as follows:
1. After every significant runoff producing rainfall event and at least monthly:
a. Inspect the wet detention basin system for sediment accumulation, erosion, trash accumulation,
vegetated cover, and general condition.
b. Check and clear the orifice of any obstructions such that drawdown of the temporary pool occurs within
2 to 5 days as designed.
2. Repair eroded areas immediately, re -seed as necessary to maintain good vegetative cover, mow vegetative
cover to maintain a maximum height of six inches, and remove trash as needed.
3. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to maintain
proper functioning.
4. Remove accumulated sediment from the wet detention basin system semi-annually or when depth is
reduced to 75% of the original design depth (see diagram below). Removed sediment shall be disposed of
in an appropriate manner and shall be handled in a manner that will not adversely impact water quality (i.e.
stockpiling near a wet detention basin or stream, etc.).
The measuring device used to determine the sediment elevation shall be such that it will give an accurate
depth reading and not readily penetrate into accumulated sediments.
When the permanent pool depth reads 4.50_ feet in the main pond, the sediment shall be removed.
When the permanent pool depth reads 3.75 feet in the forebay, the sediment shall be removed.
Sediment Removal El. 20.25
Bottom Ele tion 19.0 ? 2,�
FOREBAY
BASIN DIAGRAM
(fill in the blanks)
Permanent Pool Elevation 24.0
Sediment Removal Elevation _- - - - - -19.5� 75% - - - -
Bottom Elevation _18.0 I 25%
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: John Baker
Title:
Address:
Phone:
Signature:
l
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, eLi�let./i7 i' 7 a4Y1n , a Notary Public for the State of lAa✓I1�7 644� /14'`-- ,
County of N&P) UV,P , do hereby certify that J6 /n -0 I g-
personally appeared before me this day of O-L& 644Z C-" , 2-00-1 , and acknowledge the due
execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal,
° NOTARY
%,e• PUBLIC
SEAL
My commission expires
%Z, 94. /!
Form SWU-102 Rev 3.99 Page 4 of 4

Permit No. c �' 'n -7
(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: Rice Creek Plantation— Phase 1 (Pond 10)
Contact Person: Brian Nall (Bowman DecigP & F.n� 1 I Phone Number: [phone]
For projects with multiple basins, specify which basin this worksheet applies to:
elevations
Basin Bottom Elevation 14.5 ft. (floor of the basin)
Permanent Pool Elevation 20.5 ft. (elevation of the orifice)
Temporary Pool Elevation 22.5 ft. (elevation of the discharge structure overflow)
areas
Permanent Pool Surface Area 6,975 sq. ft. (water surface area at the orifice elevation)
Drainage Area 332,430 ac. (on site and off -site drainage to the basin)
Impervious Area 160,080 ac. (on site and off -site drainage to the basin)
volumes
Permanent Pool Volume 16,526 cu. ft. (combined volume of main basin and forebay)
Temporary Pool Volume 16,502 cu. ft. (volume detained above the permanentpool)
Forebay Volume 3,362 cu. ft. (approximately 20% of total volume)
Other parameters
SA/DA1 0.0201 (surface area to drainage area ratio from DWQ table)
Diameter of Orifice 1 50 in. (2 to 5 day temporary pool draw -down required)
Design Rainfall 1.00 in.
Design TSS Removal 2 85 % (minimum 85% required)
Form SWU-102 Rev 3.99 Page 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 % 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 BUT 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
Bs H a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet).
Pis N b. The forebay volume is approximately equal to 20% of the basin volume.
654 c. The temporary pool controls runoff from the design storm event.
6SI4 d. The temporary pool draws down in 2 to 5 days.
5'9(4 e. If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow
calculations)
65-8 f. The basin length to width ratio is greater than 3:1.
15541 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).
�kV i. Vegetative cover above the permanent pool elevation is specified.
1760 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.
4 f 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.
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)`® does 0 does not incorporate a vegetated filter at the outlet.
This system (check one) 0 does 0 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 generalcondition.
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 4.50 feet in the main pond, the sediment shall be removed.
When the permanent pool depth reads 3.75 feet in the forebay, the sediment shall be removed.
Sediment Removal El. 16.75
Bottom Elation 15.5 T 2
FOREBAY
BASIN DIAGRAM
(fill in the blanks)
Permanent Pool Elevation 20.5
Sediment Removal Elevation 16.0
-----------------------------------
Bottom Elevation 14.5
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 SW-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 parry.
Print Name: John Baker
Title:
Address: PO Box 19808 Raleigh, NC 27619
Phone:
Signab
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. - r n
I, K,&*W f 11 F. -PGdA-✓I n , a Notary Public for the State of Al OtJ11 CAtZ 11 ` &--
County of tAW -HCtA(Ne.V , do hereby certify that `1 Dt.rl —aa&x—
personally appeared before me this day of 2U-M Ma's wirl , and acknowledge the due
execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal,
r A�.
NOTARY •� =
` PUBLIC
�M. • e° �\
SEAL 6 allAq- ',�
My commission expires /, 'V4. /I
Form SWU-102 Rev 3.99 Page 4 of 4

Rice Creek Plantation — Phase I
Stormwater Permit No. SW8 070333MOD
Brunswick County
Designer's Certification
State Stormwater Management Systems.
'r it No. SW8 070333MOD
.Page 1 of 2
1, DlA,VID AQUA MAO-A as a duly registered_in
the State of North Carolina, having been authorized to observe (Leriod_icgjI /weekly/full
time) the construction of the project,
UcE cow PLA&mA- loIJ —PMASl: 'I
(Project)
for s-ru t ^SSeaclAIM 0 Lt-c (Project Owner) hereby state that, to the
best of my abilities, due care and diligence was used in the observation of the project
construction such that the construction was observed to be built within substantial
compliance and, intent of the approved plans and specifications.
The checklist of items on page 2 of this form area part of -this. Certification.
Noted deviations from approved plans and specifications:
1AAf leave a1 � Xtr 6,w1—V Ao►iL ^oV
hers e"jr1►'vc� Af s.�I/%o s �=iGt e1�40J` W et�r ,4.
d%awr �I *e �p s,r,o111 d 1'1�0
be�•.� r�37�rocl+� Co
Signature zi K,-'-4v6--vW
Registration Number 4V147,'9
Date
I0.* s yr A&,"
xe AeM/.
SEAL
P=na Q of in

State Stormv `gr Management Systems
Pt_ait No. SW8 070333MOD
Certification Requirements: Page 2 of 2
_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.
_i✓ 7. Trash rack is provided on the outlet/bypass structure.
o," 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-
circulting 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, a
forebay, and the vegetated filter.
_Z15. The required dimensions of the system are provided, per the approved
plan.
cc: NCDENR-DWQ Regional Office
Brunswick County Building Inspections
Pena in of in