SW8910403_Current Permit_20170711

ROY COOPER
t
Governor
MICHAEL S. REGAN
Secretary
Energy,Mineral& TRACY DAVIS
Land Resources Director
ENVIRONMENTAL QUALITY
July 11, 2017
Pender County(Property Owner)
ATTN: Kyle Breuer,Planning Director
PO Box 1519
Burgaw,NC 28425
Subject: State Stormwater Management Permit No.SW8 910403
Pender County Government Complex
High Density Project
Pender County
Dear Mr. Breuer:
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 modified permit references DEMLR as the Division responsible for
issuance of the permit.
The Wilmington Regional Office received a complete modified Stormwater Management Permit
Application for the Pender County Government Complex on May 30,2017. Staff review of the plans and
specifications has determined that the project, as proposed,will comply with the Stormwater Regulations
set forth in Title 15A NCAC 2H.1000. We are forwarding modified Permit No. SW8 910403 dated July
11,2017,for the construction,operation and maintenance of the subject project's built-upon areas and
stormwater control measures.
The modifications covered by this permit include:
1. The addition of 2,000 sf of building for the Coastal Horizons Center located within the
Pond 2 drainage area.
2. The drainage area map approved on August 9, 2006 remains in full force and effect.
3. Please replace the previously approved sheet titled"Stormwater Plan with Pond II"with
the attached modified plan sheet.
On August 5, 2009,the Governor signed Session Law 2009-406. This law impacted any development
approval issued by the former Division of Water Quality under Article 21 of Chapter 143 of the General
Statutes, which was current and valid at any point between January 1,2008, and December 31,2010.The
law extended the effective period of any stormwater permit that was set to expire during this time frame
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 a total of four(4)years extension. Accordingly,this permit
shall now be effective from the date of issuance until August 9,2020 and shall be subject to the
conditions and limitations as specified therein.
Please pay special attention to the conditions listed in this permit regarding the Operation and
Maintenance of the BMP(s),recordation of deed restrictions (if required), certification of the BMP's, and
the procedures for changing ownership,transferring the permit, and renewing the permit. Failure to
establish an adequate program for operation and maintenance of the stormwater management system,to
record deed restrictions,to certify the BMP's,to transfer the permit,or to renew the permit, will result in
future compliance problems.
State of North Carolina I Em3ronmentai Quaitty 1 Energy.Mineral and Land Resources
Wilmington Reg'..ra'Office 1 127 Cardinal Drive Extension I Wilmington.NC 25405
910 796 7215

State Stormwater Management Systems
Permit No. SW8 910403 Modification
If you have any clucslions, or need additional information concerning this matter,please contact r'
Linda Lewis in the Wilmington Regional Office at (910) 796-72 15.
Sincerely,
�?m Tracy Davis, P.E., Director
Division of Energy, Mineral and Land Resources
GDS/arl: G:\\\Stormwater\Permits &Projects\1991\910403 HD\2017 07 permit 910403
cc: Mark Walton,P.E.,Walton Engineering(PO Box 895 Burgaw 28425)
Ryan Estes, Operations Director, Coastal Horizons Center,Inc. (Developer)
(PO Box 550 Burgaw 28425)
Randell Woodruff,Pender County Manager(PO Box 5,Burgaw 28425)
Loius Hesse,Town of Burgaw Building Permits
Wilmington Regional Office Stormwater Permit Pile
Page 2 of 2

State Stormwater Management Systems
Permit No. SW8 910403 Modification
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF ENERGY, MINERAL AND LAND RESOURCES
STATE STORMWATER MANAGEMENT PERMIT
HIGH DENSITY DEVELOPMENT
In accordance with the provisions of Article 21 of Chapter 143, General Statutes of North
Carolina as amended; and other applicable Laws, Rules, and Regulations
PERMISSION IS HEREBY GRANTED TO
Pender County
Pender County Government Complex
801 S. Walker Street, Burgaw, Pender County
FOR THE
construction, operation and maintenance of 2 wet detention ponds in compliance with the
provisions of 15A NCAC 2H .1000 (hereafter referred to as the "stormwater rules') and the
approved stormwater management plans and specifications and other suDDortina data as
attached and on file with and approved by the Division of Energy, Mineral and Land Resources
(hereafter DEMLR or Division) and considered a part of this permit.
This permit shall be effective Worn the date of issuance until August 9, 2020, and shall be
subject to the following specified conditions and limitations:
I. DESIGN STANDARDS
1. This permit is effective only with respect to the nature and volume of stormwater
described in the application and other supporting data.
2. This stormwater system has been approved for the management of stormwater runoff as
described in Section 1.6 on page 3 of this permit. The stormwater Pond #1 and #2 have
been designed to handle the runoff from 102,164 ft2; and 43,049 ft2of impervious area,
respectively. Pond 3, as listed in this permit and on the application documents,
represents Pond 2 at its full build-out condition, which is designed to handle the runoff
from 174,460 ft2 of impervious area.
3. The tract and each drainage area will be limited to the amount of built-upon area
indicated in Sections 1.2 and 1.6 of this permit, and per approved plans. Pond 2 is
designed for an interim condition - Pond 3 represents Pond 2 at its full build-out
condition.
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 common areas and 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 appropriate permitted stormwater control system.
Page 1 of 6

State Stormwater Management Systems
Permit No. SW8 910403 Modification
6. The following design criteria have been permitted for the wet detention ponds and must
be maintained at design condition:
Pond 1 Pond 2 OPond 3
a. Drainage Area, acres: 4.62 5.92 5.92
Onsite, ft2: 201,801 257,695 257,695
Offsite, ft2: 0 0 0
b. Total Impervious Surfaces, ft2: 102,164 43,049 174,460
c. BUA subject to 1" Design Storm: 102,164 41,049 172,460
d. BUA subject to 1.5" Design Storm: 0 2,000 2,000
e. Pond Depth, feet: 5.0 5.0 5.0
f. TSS removal efficiency: 90% 90% 90%
g. Permanent Pool Elevation, FMSL: 49.0 48.0 48.0
h. Permanent Pool Surface Area, ft2: 10,356 4,244 13,034
i. Permitted Storage Volume, ft3: 12,467 4,948 14,168
j. Temporary Storage Elevation, FMSL: 50.0 49.0 49.0
k. Controlling Orifice: 1.25"0 3 @0.5"0 2 @1"0
I. Permitted Forebay Volume, ft3: n/a 2,767 10,533
m. Max. Fountain Horsepower: 1/8 1/8 1/6
n. Receiving Stream/River Basin: Osgood Branch /CPF23
o. Stream Index Number: 18-74-39-1
p. Classification of Water Body: "C Sw"
OPond 3 represents Pond 2 at its full future build-out condition.
II. SCHEDULE OF COMPLIANCE
1. The stormwater management system shall be constructed in its entirety, vegetated and
operational for its intended use prior to the construction of any built-upon surface.
2. During construction, erosion shall be kept to a minimum and any eroded areas of the
system will be repaired immediately.
3. The permittee shall provide the operation and maintenance necessary to assure the
permitted stormwater system functions at optimum efficiency. The approved Operation
and Maintenance Plan is incorporated by reference and must be followed in its entirety
and maintenance must occur at the scheduled intervals. times.
4. 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.
5. Upon completion of construction, prior to issuance of a Certificate of Occupancy, and
prior to operation of this permitted facility, a certification must be received from an
appropriate designer for the system installed certifying that the permitted facility has
been installed in accordance with this permit, the approved plans and specifications, and
other supporting documentation. Any deviations from the approved plans and
specifications must be noted on the Certification. A modification may be required for
those deviations.
6. The facilities shall be constructed, operated and maintained in accordance with the
conditions of this permit, the approved plans and specifications, and other supportinq
data. -
Page 2of6

State Stormwater Management Systems
Permit No. SW8 910403 Modification
7. 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 a fountain in this pond is based on the permanent
pool volume, as listed in Section 1.6 of this permit.
8. 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.
9. The permittee shall provide for continued access to the stormwater facilities for
maintenance and inspection via appropriately recorded access easements to the nearest
public right-of-way.
10. The permittee shall submit to the Director and shall have received approval for revised
plans, specifications, and calculations prior to construction, for any modification to the
approved plans, including, but not limited to, those listed below:
a. Any revision to any item shown on the approved plans, including the stormwater
management measures, built-upon area, details, etc.
b. Redesign or addition to the approved amount of built-upon area or to the
drainage area.
c. Further subdivision, acquisition, lease or sale of all or part of the project area as
reported on the application documents.
d. Altering, removing, redirecting, relocating or resizing of any runoff conveyance
measure (vegetated or piped) shown on the approved plan.
e. The construction of any allocated future built-upon area.
f. The construction of permeable pavement or#57 stone or public trails for BUA
credit
11. A copy of the approved plans and specifications shall be maintained on file by the
Permittee.
12. The Director may notify the permittee when the permitted site does not meet one or
more of the minimum requirements of the permit. Within the time frame specified in the
notice, the permittee shall submit a written time schedule to the Director for modifying
the site to meet minimum requirements. The permittee shall provide copies of revised
plans and certification in writing to the Director that the changes have been made.
III. GENERAL CONDITIONS
1. Any individual or entity found to be in noncompliance with the provisions of a stormwater
management permit or the requirements of the stormwater rules is subject to
enforcement procedures as set forth in NCGS 143 Article 21.
2. The issuance of this permit does not preclude the Permittee from complying with all
statutes, rules, regulations or ordinances, which may be imposed by other government
agencies (local, state, and federal) having jurisdiction.
Page 3 of 6

State Stormwater Management Systems
Permit No. SW8 910403 Modification
3. 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 Name/Ownership
Change Form, accompanied by the supporting documentation as listed on the form, to
the Division of Energy, Mineral and Land Resources at least 60 days prior to any one or
more of the following events:
a. An ownership change including 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-
b. 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;
c. Bankruptcy;
d. Foreclosure, subject to the requirements of Session Law 2013-121;
e. Dissolution of the partnership or corporate entity, subject to NCGS 57D-2-01(e) and
NCGS 57D-6-07;
f. A name change of the current permittee;
g. A name change of the project;
h. A mailing address change of the permittee;
4. In the event that the facilities fail to perform satisfactorily the Permittee shall take
immediate corrective action, including those as may be required by this Division, such as
the construction of additional or replacement stormwater management systems.
5. The permittee grants DEQ Staff permission to enter the property during normal business
hours for the purpose of inspecting all components of the permitted stormwater
management facility.
6. The permit may be modified, revoked and reissued or terminated for cause. The filing of
a request for a permit modification, revocation and reissuance or termination does not
stay any permit condition.
7. Unless specified elsewhere, permanent seeding requirements for the stormwater control
must follow the guidelines established in the North Carolina Erosion and Sediment
Control Planning and Design Manual.
8. Approved plans and specifications for this project are incorporated by reference and are
enforceable parts of the permit.
9. The permittee shall submit a permit renewal application, required documents and the
required renewal fee 180 days prior to the expiration date of this permit.
Permit modified, updated and reissued this the 11t' day of July 2017.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
�Z) S�
Tracy Dav , P.E., Director
Division of Energy, Mineral and Land Resources
By Authority of the Environmental Management Commission
Page 4 of 6

State Stormwater Management Systems
Permit No. SW8 910403 Modification
Pender County Government Complex
Stormwater Permit No. SW8 910403
Pender County
Designer's Certification
I, , as a duly registered in the
State of North Carolina, having been authorized to observe (periodically/weekly/full
time) the construction of the project,
(Project)
for (Project Owner) hereby state that, to the
best of my abilities, due care and diligence'was used in the observation of the project
construction such that the construction was observed to be built within substantial
compliance and intent of the approved plans and specifications.
The checklist of items on page 2 of this form is included in the Certification.
Noted deviations from approved plans and specification:
SEAL
Signature _
Registration Number
Date
Page 5 of 6

State Stormwater Management Systems
Permit No. SW8 910403 Modification
Certification Requirements:
1. The drainage area to the system contains approximately the permitted
acreage.
2. The drainage area to the system contains no more than the permitted
amount of built-upon area.
3. All the built-upon area associated with the project is graded such that the
runoff drains to the system.
4. All roof drains are located such that the runoff is directed into the system.
5. The outlet/bypass structure elevations are per the approved plan.
6. The outlet structure is located per the approved plans.
7. Trash rack is provided on the outlet/bypass structure.
8. All slopes are grassed with permanent vegetation.
9. Vegetated slopes are no steeper than 11.
10. The inlets are located per the approved plans and do not cause short-
circuiting of the system.
11. The permitted amounts of surface area and/or volume have been
provided.
12. Required drawdown devices are correctly sized per the approved plans.
13. All required design depths are provided.
14. All required parts of the system are provided, such as a vegetated shelf,
and a forebay.
15. The required system dimensions are provided per the approved plans.
cc: NCDEQ-DEMLR Regional Office
Pender County Planning
Page 6 of 6

DEMLR USE ONLY
Date geceivfid Fee P 'd t Numbe
��J.
Applicab e ❑Coastal SW—1995 ❑Coastal SW—2008 ❑Ph II-Post Construction
(select all that apply) ❑Non-Coastal SW-HQW/ORW Waters ❑Universal Stormwater Management Plan
❑Other WQ Mgmt Plan:
State of North Carolina
Department of Environment and Natural Resources
Division of Energy,Mineral and Land Resources
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This form may be photocopied for use as an original
I. GENERAL INFORMATION
1. Project Name(subdivision,facility,or establishment name-should be consistent with project name on plans,
specifications,letters,operation and maintenance agreements,etc.):
Pender County Government Complex-Stormwater Permit Mod.
2. Location of Project(street address):
801 South Walker Street
City:Burgaw County:NC Zip:28425
3. Directions to project(from nearest major intersection):
Business HWY 117 and S.Walker Street
1/2 mile NW from intersection of HWY 117 and Business HWY 117 left side of road
4. Latitude:34*32'32"N Longitude:77°54'59"W of the main entrance to the project.
II. PERMIT INFORMATION: ��/
1.a.Specify whether project is(check one): ❑New ®Modification ❑ 0a`I� Vidd'1llc
tRenewals with modifications also requires SWLI 1 Rl �ir Fo
b.If this application is being submitted as the result of a modification to an existin ermit,list the existin
permit numberSW8 910403 Mod. ,its issue date(if known)Aug 9,2006 the status of
construction: ❑N�Tot Started []Partially Completed* ®Completed* *provide a designer's certs cation
2. Specify the type of project(check one):
❑Low Density ®High Density ❑Drains to an Of-site Stormwater System ❑Other
3. If this application is being submitted as the result of a previously returned application or a letter from
DEMLR requesting a state stormwater management permit application,list the stormwater project number,
if assigned,NA and the previous name of the project,if different than currently
proposed,NA
4.a.Additional Project Requirements(check applicable blanks;information on required state permits can be
obtained by contacting the Customer Service Center at 1-877-623-6748):
❑CAMA Major ❑Sedimentation/Erosion Control: ac of Disturbed Area
❑NPDES Industrial Stormwater ❑404/401 Permit:Proposed Impacts
b.If any of these permits have already been acquired please provide the Project Name,Project/Permit Number,
issue date and the type of each permit:NA
5. Is the project located within 5 miles of a public airport? ®No ❑Yes
If yes,see S.L.2012-200,Part VI.http://portal.ncdenr.org/web/Jr/rules-and-regulations
Form SWU-101 Version Oct.31,2013 Page 1 of 6

III. CONTACT INFORMATION
1.a;Print Applicant/Signing Official's name and title(specifically the developer,property owner,lessee,
designated government official,individual,etc.who awns the nrajectl:
Applicant/Organization:Coastal Horizons Center Inc.
Signing Official&Title Ryan Estes /Operations Director-Pender
b.Contact information for person lasted in item 1a above:
Street Address:803 South Walker Street
City:Burgaw State:NC Zip:28425
Mailing Address(if applicable):PO Box 550
City:Burzaw _ State:NC Zip:28425
Phone: [phone] Fax: )
Email:restes@coast:alhorizons org
c.Please check the appropriate box.The applicant listed above is:
❑The property owner(Skip to Contact Information,item 3a)
❑Lessee*(Attach a copy of the lease agreement and complete Contact Information,item 2a and 2b below)
0 Purchaser*(Attach a copy of the pending sales agreement and complete Contact Information,item 2a and
2b below)
®Developer*(Complete Contact Information,item 2a and 2b below.)
2.a.Print Property Owner's name and title below,if you are the lessee,purchaser or developer. (This is the
person who owns the property that the project is located on):
Property Owner/OrganizatiorrPender County
Signing Official&Title:Kvle Breuer,Planning Director
b.Contact information for person listed in item 2a above:
Street Address:805 South Walker St
City:Burgaw _ State:NC Zip:28425
Mailing Address(if applicabie):PO Box 1519
City:Bureaw State:NC Zip:28425
Phone: MO ) 259-1202 Fax: 970 1 259-1295
[e-mail]
3.a. (Optional)Print the name and title of another contact such as the projeces construction supervisor or other
person who can answer questions about the project:
Other Contact Person/Organizations Mark Walton.Walton Engineering
Signing Official&Title:R Mark Walton,Owner/Professional Engineer
b.Contact information for person listed in item 3a above:
Mailing Address:PO Box 895
City:Bureaw State:NC Zip:28425
Phone. [phone] Fax: ( l NA
Email: ---
CEI
4. Local jurisdiction for building permits:Town of Bureaw
2016
Point of ContactLouis Hesse Phone#: 910 663 T
5
Farm SV U-101 Vcrsion Oct.31,2013 Page 2 of 6

1V: PROJECT INFORMATION
1. In the space provided below,briefly summarize how the stormwater runoff will be treated.
Stormwater runoff from itpr—Qp9sed build in will flow into the existin stormwater nd ond.
ID
2.a.If claiming vested rights,identify the supporting documents provided and the date they were approved:
El Approval of a Site Specific Development Plan or PUD Approval Date:
❑Valid Building Permit Issued Date:
❑Other: Date-
b.If claiming vested rights,identify the regulation(s)the project has been designed in accordance with:
❑Coastal SW-1995 ❑Ph II-Post Construction
3. Stormwater runoff from this project drains to the Crave Fear River basin.
4. Total Property Area:12.42 acres 5. Total Coastal Wetlands Area:0 acres
6. Total Surface Water Area: acres
7. Total Property Area(4)-Total Coastal Wetlands Area(5)-Total Surface Water Area(6)=Total Project
Arrea*:12.42 acres
+ Total project area shall be calculated to exclude the following: the normal pool of impounded structures,the area
between the banks of streams and ravers, the area below the Normal Hi h Water(NHW)line or Mean High Water
(MHM lane,and coastal wetlands landward from the NHW(or"line. The resultant project area is used to
calculate overall percent built upon area(BLIA). Non-coastal wetlands landward of the NHW(or MHM lane may
be included in the total project area.
8. Project percent of impervious area: (Total Impervious Area/Total Project Area)X 100 =60 %
9. How many drainage areas does the project have?i(For high density, count 1 for each proposed engineered
storrnxvater BMP. For low density and other projects,use 1 for the whole properly area)
10. Complete the following information for each drainage area identified in Project Information item 9. If there
are more than four drainage areas in the project,attach an additional sheet with the information for each area
provided in the same format as below.
Basin Information Drainage Area 2 Drains Area 1 1.Drainage Area 1 Drainage Area
Receiving Stream Name Osgood Branch Osgood Branch
Stream Class * C Sw C Sw
Stream Index Number* CPF233 CPF23
18-74-39-1 18-74-39-1
Total Drainage Area(sf) 257,695 SF 201,081 SF
On-site Drainage Area(sf) 257,695 SF 201,081 SF
Off-site Drainage Area(sf) NA 0
Proposed IT pervious Area** s 43,049 SF 0
% Impervious ervious Area*" total 16.7% 50.8%
Im envious`Surface Area Dra!2sE Area 2 Drainage Area Drainage Area Drainage Area
On-site Buildings/Lots(sf) 2,000 SF NA
tin-site Streets (sf) NA NA
On-site Parking (sf) NA NA
On-site Sidewalks (sf) NA NA
Other on-site (sf) NA NA
Future(sf) NA NA
Off-site (sf) NA NA
Existirig BUA***(sf) 41,049 102,164 SF
Total (sf): 4%049 1.02,164 SF
* Stream Class and Index Number can be determined at: ht#n._/1portai ncdenr.,orgfwebfwc ps/csar�classi 'cafio>i
" Impe;vious area is deftned as the built upon area includin&but not limited to,buildings,roads,parking areas,
sidewalks,gravel areas,etc.
Farm SWU-101 Version.Oct.31,2013 Page 3 of

Additional Drainage Area
(Proposed Future Development) (pdhip a) = Po� Ze a%(I
Basin information Drainage Area '-Ctf
Receiving Stream Name Osgood Branch
Receiving Stream Class C SW
Drainage Area 257695 s.f.
P
ing im `ous Ares 41049 s.f.
used Im pervious Area 174460 s f.
pervious Area 67.7
Impervious Surface Area Drainage Area
On-site Buiidin s 7022 s.f.
On site Streets 31477 s f
On-site Parkin 0
On-site Sidewalks 2550 s.f.
Other on-site 133411 s.f.
Off-Site 0
Total: 174460 s.f
ECEIVE
DEC 0 2 2016
BY:

*Report only that amount of existing BLIA that will remain after development.Do not report any existing BUA that
is to be removed and which will be replaced by new BUA.
11.. How was the off-site impervious area listed above determined?Provide documentation.NA
Pro'ects in Union C4un :Contact DEMLR Central Lice staff'to check if the project is located within a Threatened&
Endangered Species watershed that may be subject to more stringent.stormwater requirements as per 1 SA.NCAC 02B.0600.
V. SUPPLEMENT AND O&M FORMS
The applicable state stornnwater management permit supplement and operation and maintenance(O&M)forms
must be submitted for each BMP specified for this project. The latest versions of the forms can be downloaded
fromhft.//portal..nedenr.piZ/web/wa/ws/su/bmv-manual.
VL SUBMITTAL REQUIREMENTS
Only complete application packages will be accepted and reviewed by the Division of Energy,Mineral and
Land Resources(DEMLR). A complete package includes all of the items listed below. A detailed application
instruction sheet and BMP checklists are available from
hitp-//portal.ncdenr.ors/web f rhr�i I ws}su/statesw/forms does. The complete application package should be
submitted to the appropriate DEMLR Office. (The appropriate office may be found by locating project on the
interactive online map athttp://Rortal.ncdenr.orz web}wq/ws/su/moos.)
Please indicate that the following required information have been provided by initialing,in the space provided
for each item_All original documents MUST be signed and initialed in blue ink. Download the latest versions
for each submitted application package from hgR:/JR20rtal.ncdenLor&Jweb/34/ws/su/statesw/forms does.
Initials
1. Original and one copy of the Stormwater Management Permit Application Form.
2. Original and one copy of the signed and notarized Deed Restrictions&Protective Covenants
Form. (if required as per Part VII below)
3. Original of the applicable Supplement Form(s)(sealed,signed and dated)and O&M
agreement(s)for each BMP.
4. Permit application processing fee of$505 payable to NCDENR. (For an Express review,refer to !
ht-tz://www.envheliD.orelpazes/onestiD x ress.html for information on the Express program
and the associated fees. Contact the appropriate regional office Express Permit Coordinator for
additional information and to schedule the required application meeting.) /
5. A detailed narrative(one to two pages)describing the stormwater treatment/managementfor
the project. This is required in addition to the brief summary provided in the Project
Information,item 1.
6. A USGS map identifying the site location. If the receiving stream is reported as class SA or the
receiving stream drains to class SA waters with 1/i mile of the site boundary,include the 1h
mite radius on the map.
7. Sealed,signed and dated calculations(one copy), t f
S. Two sets of plans folded to S 5"x 14"(sealed,signed,&dated),including.
a. Development/Project name.
b. Engineer and firm.
c. Location map with named streets and NCSR numbers.
d. Legend.
e. North arrow.
f. Scale,
g. Revision number and dates. ECEIVE
h. Identify all surface waters on the plans by delineating the normal pool elevaLIDf
impounded structures,the banks of streams and rivers,the MHW or NHW 1UO2Z016
waters,and any coastal wetlands landward of the MHW or NHW lines.Delineate the vegetated buffer landward from the normal pool elevationunded
structures,the banks of streams or rivers,and the MHW(or NHW).of Li
i. Dimensioned property/project boundary with bearings&distances.
j. Site Layout with all BUA identified and dimensioned.
k. Existing contours,proposed contours,spot elevations,finished floor elevations.
1. Details of roads,drainage features,collection systems,and storrnwater control measures.
m.Wetlands delineated,or a note on the plans that none exist. (Must be delineated by a
qualified person. Provide documentation of qualifications and identify the person who
made the determination on the plans.
Form SWU-101 Version.Oct.31,2013 Page 4 of 6

n. Existing drainage(including off-site),drainage easements,pipe sizes,runoff calculations.
eo. Drainage areas delineated(included in the main set of plans,not as a separate document)-
P. Vegetated buffers(where required).
9. Copy of any applicable soils report with the associated SHWT elevations(Please identify
elevations in addition to depths)as well as a map of the boring locations with the existing
elevations and boring logs.Include an 8.5"x11"copy of the NRCS County Soils map with the
project area clearly delineated. For projects with infiltration BMPs,the report should also
include the soil type,expected infiltration rate,and the method of determining the infiltration rate.
(Infiltration Devices submitted to WiRO:Schedule a site visit fnr DF�VILR to veryf the SHWT prior
to submittal,[phone].)
10. A copy of the most current property deed. Deed book 0756 Page No:415 V
11. For corporations and limited liability corporations(LLC):Provide documentation from the NC
Secretary of State or other official documentation,which supports the titles and positions held
by the persons listed in Contact Information,item 1a,2a,and/or 3a per 15A NCAC 2H.1003(e).
The corporation or LLC must be listed as an active corporation in good standing with the NC
Secretary of State,otherwise the application will be returned.
http://www.secmLar,y.stabe.nc.us/ggMorations/CSearch.asRx
VII. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
For all subdivisions,outparcels,and future development,the appropriate property restrictions and protective
covenants are required to be recorded prior to the sale of any lot. If lot sizes vary significantly or the proposed
BUA allocations vary,a table listing each lot number,lot size,and the allowable built-upon,area must be provided
as an attachment to the completed and notarized deed restriction form. The appropriate deed restrictions and
protective covenants forms can be downloaded from es httn://portal.ncdenr.or !g yebllr/state-stormwater
forms do .Download the latest versions for each submittal.
In the instances where the applicant is different than the property owner,it is the responsibility of the property
owner to sign the deed restrictions and protective covenants form while the applicant is responsible for ensuring
that the deed restrictions are recorded.
By the notarized signature(s)below,the permit holder(s)certify that the recorded property restrictions and
protective covenants for this project,if required,shall include all the items required in the permit and listed
on the forms.available on the website,that the covenants will be binding on all parties and persons claiming
under them,that they will run with the land,that the required covenants cannot be changed or deleted
without concurrence from the NC DEMLR,and that they will be recorded prior to the sale of any lot.
VIII. CONSULTANT INFORMATION AND AUTHORIZATION
Applicant: Complete this section if you wish to designate authority to another individual and/or firm(such as a
consulting engineer and/or firm)so that they may provide information on your behalf for this project(such as
addressing requests for additional information).
Consulting Engineer:Mark Walton
Consulting Firm:Walton Eneineerinir
Mailing Address:PO Box 895
CityBurtraw State:NC Zip:28425
Phone: (910 ) 2594800 Fax: ( )
Email:mark@waitonen& .net
IX. PROPERTY OWNER AUTHORIZATION(if Contact Information,item 2 has been filled out,complete this
section)
I, (print or type name of person listed in Contact Information,item 2a)Kule Breuer Re frrsec�k�fi ve p�i�Utifyy that I
own the property identified in this permit application,and thus give permission to(print or type name of person
listed in Contact Information,item 1a)Ryan Estes with(print or type name o or errs:anon lis din
Contact Information,item 1a)Coastal Honzons Center Inc. to develop the project as of
the lease agreement or pending property sales contract has been provided,with the. ttal,which indica
party responsible for the operation and maintenance of the stormwater system DEC 02 2016
Form SWU-101 Version Oct.31,2013 Page 5 of 6

As the legal property owner I acknowledge,understand,and agree by my signature below,that if my designated
agent(entity listed in Contact Information,item 1)dissolves their company and/or cancels or defaults on their
lease agreement,or pending sale,responsibility for compliance with the DEMLR Stormwater permit reverts back
to me,the property owner.As the property owner,it is my responsibility to notify DEMLR immediately and
submit a completed Name/Ownership Change Form within 30 days;otherwise I will be operating a stormwater
treatment facility without a valid permit I understand that the operation of a stormwater treatment facility
without a valid permit is a violation of NC General Statue 143-215.1 and may result in appropriate enforcement
action including the assessment of civil penalties of up to$25,000 per day,pursuant to NCGS 143-215.6.
Signature:
Date: ir/lIl2rf6
I, a Notary Public for the State of,� n�__
County of
do here certify that
�_ personally appeared
before me this,i-V. of (9 l. ) and a dge the execu 'ono application far
a stormwater permit Witness my hand and official seal,
`a`\A,\`�NaCu�JOB,
SEAL
� �tl�
O
N
p VMy comm,'.cmfon expires
X. APPLICANT'S CERTMCATIQN
I, (print or type name of person listed in Contact Information,item 1a)Ryan Estes
certify that the information included on this permit application form is,to the best of my knowledge,correct and
that the project will be constructed in conformance with the approved plans,that the required deed restrictions
and protective covenants will be recorded,and that the proposed project complies with the requirements of the
applicable `��stormwater r Ies under 15A CAC 2I I.1000 and.any other applicable state storm a requirements.
(, )X J�
� ..s
Signature: Date: �1
I, ,a Notary lic for the State of Y ( County of
da -eby certify that �(,aJ personally appeared
before me this 4 day of ✓ gja�,and ackno ledge the due execationof the appli tion for
a stormwater permit. Witness my hand and official seal,
,%owa
HP
SEAL
IR NOTARY
V;o PUBLIC F My commission expires
y�41 p I
DEC 0 2 2016
Form S WU-101 Version Oct.31,2013 Page 6 of 6

Operation & Maintenance Agreement
Project Name: Pender County Government Complex
Project Location: 801 S. Walker St., Burgaw, NC 28425
Cover Page -�
Maintenance records shall be kept on the following BMP(s). This maintenance record shall be kept in a log in a known set
location. Any deficient BMP elements noted in the inspection will be corrected, repaired,or replaced immedlatel, These
deficiencies can affect the integrity of structures,safety of the public,and the pollutant removal efficiency of the BMP(s).
The BMP(s)on this project include(check all that apply&corres onding O&M tables will be added automatically):
B!oretention Cell Quantity: Location(s):
Dry Detention Basin Quantity: Location(s):
Grassed Swale Quantity: Location(s):
Green Roof Quantity: Location(s):
Infiltration Basin Quantity: Location(s):
Infiltration Trench Quantity: Location(s):
Level SpreaderNFS Quantity: Location(s):
Permeable Pavement Quantity: Location(s):
Proprietary System Quantity: Location(s):
Rainwater Harvesting Quantity: Location(s):
Sand Filter Quantity: Location(s):
Stormwater Wetland Quantity: Location(s):
Wet Detention Basin Quantity: 3 Location(s): Pond 1, Pond 2,Pond 3
Disconnected Impervious Area Present: No Location(s):
User Defined BMP Present: No Location(s):
I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed
for each BMP above,and attached O&M tables. !agree to notify NCDENR of any problems with the syster�,or prior to any
changes to the system or responsible party.
"Responsible Party: Randell K.Woodruff
Title&Organization: County Manager,PendWr—C-ounty,NC
Street address: 805 S.Walker Street
City,state,zip: Burgaw,NC 28425
Phone number(s): 910-259-1200
Email:I [e-mail]
Signature: Date: '
1, * a No Public for the State(ff, n
County of d by certify that
personally appeared before me this day of and
acknowledge the due execution of the Oper tion and Mainte nee Agreemgnt
Witnes``�MJiaDi9*pd official seal, �,
��`` -ANN ''�i 20 17
m 2
=� NOTARY tp '
PUBLIC
l- 0
t'�cove,"
Seal My commission expires
STORM-EZ 5/23/2017
Version 1.4 O&M Manual Page 1 of 4

Wet Detention Pond Maintenance Requirements
The wet detention basin system is defined as the wet detention basin,pretreatment including forebays and the vegetated filter if
one is provided.
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: Potential problem: How I will remedlate the problem:
The entire BMP Trash/debris is present. Remove the trash/debris.
The perimeter of the BMP Areas of bare soil and/or Regrade the soil if necessary to remove the gully,and then plant a
erosive gullies have formed. ground cover and water until it is established. Provide lime and a one-
time fertilizer application.
Vegetation is too short or too Maintain vegetation at a height of approximately six inches.
long.
The inlet device The pipe is clogged. Unclog the pipe. Dispose of the sediment off-site.
The pipe is cracked or Replace the pipe.
otherwise damaged.
Erosion is occurring in the Regrade the swale if necessary to smooth it over and provide erosion
Swale. control devices such as reinforced turf matting or riprap to avoid future
problems with erosion.
Stone verge is clogged or Remove sediment and replace with clean stone.
covered in sediment(if
applicable).
The forebay Sediment has accumulated to Search for the source of the sediment and remedy the problem if
a depth greater than the possible. Remove the sediment and dispose of it in a location where
original design depth for it will not cause impacts to streams or the BMP.
sediment storage.
Erosion has occurred. Provide additional erosion protection such as reinforced turf matting or
riprap if needed to prevent 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 practices
show that pruning is needed
to maintain optimal plant
health.
Plants are dead,diseased or Determine the source of the problem: soils, hydrology,disease, etc.
dying. 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
ion the plants rather than sprayin
W$ c;14AY 3 0 2017
RY:
STORM-EZ 5/23/2017
Version 1.4 O&M Manual Page 2 of 4

Wet Detention Pond aintenance equirernents(Continued)
The main treatment area Sediment has accumulated to Search for the source of the sediment and remedy the problem if
a depth greater than the possible. Remove the sediment and dispose of it in a location where
original design sediment it will not cause impacts to streams or the BMP.
storage depth.
Algal growth covers over 50% Consult a professional to remove and control the algal growth.
of the area.
Cattails, phragmites or other I Remove the plants by wiping them with pesticide(do not spray).
invasive plants cover 50%of
the basin surface.
The embankment Shrubs have started to grow Remove shrubs immediately.
on the embankment.
Evidence of muskrat or Use traps to remove muskrats and consult a professional to remove
beaver activity is present. beavers.
A tree has started to grow on Consult a dam safety specialist to remove the tree.
the embankment.
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 Department of Environment and Natural
damage have occurred at the Resources Regional Office.
outlet.
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.
IMECEIVE
MAY 3020.7
FY:
STORM-EZ 5/23/2017
Version 1.4 O&M Manual Page 3 of 4

Wet retention Pond Des an ummary
Wet Pond Dia ram
WET POND ID FOREBAY MAIN POND
Pond 1 Permanent Pool El. 49 Permanent Pool El. 49
Temporary Pool El: 50 Temporary Pool El: 50
Pretreatment other No Clean Out Depth: 4 Clean Out Depth: 4
than forebay? Sediment Removal El: 45 Sediment Removal El: 45
Has Vag.Filter? No Bottom Elevation: 44 Bottom Elevation: 44
WET POND ID FOREBAY MAIN POND
Pond 2 Permanent Pool El. 48 Permanent Pool El. 48
Temporary Pool El: 49 Temporary Pool El: 49
Pretreatment other No Clean Out Depth: 4 Clean Out Depth: 4
than forebay? Sediment Removal EI: 44 Sediment Removal El: 44
Has Veg.Flier? Yes Bottom Elevation: 43 Bottom Elevation: 43
WET POND ID FOREBAY MAIN POND
Pond 3 Permanent Pool El. 48 Permanent Pool El. 48
Temporary Pool El: 49 Temporary Pool El: 49
Pretreatment other Gean Out Depth: 4 Clean Out Depth: 4
than forebay? Sediment Removal El: 44 Sediment Removal El: 44
Has Veg.Filter? Yes Bottom Elevation: 43 Bottom Elevation: 43
,AECEIVE
lz MAY 3 0 2TI
19Y.
STORM-EZ 6/2 312 0 1 7
Version 1.4 O&M Manual Page 4 of 4

Permit No. I-fa0
(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: Fe'I/Ogk �'ynrfY a'or WAOHOW 60ftCZ
Contact Person: /Q. MAX& 1''V,*A7 n/ Phone Number: 09/0 ) 21F9.-4.600
For projects with multiple basins, specify which basin this worksheet applies tort t S A14 Tbi fP
elevations /064W irt
Basin Bottom Elevation 44 ft. (floor of the basin)
Permanent Pool Elevation -If 9 ft. (elevation of the orifice)
Temporary Pool Elevation I O ft. (elevation of the discharge structure overflow)
areas
Permanent Pool Surface Area 1636& sq. ft. (water surface area at the orifice elevation)
Drainage Area Al. G Z ac. (on-site and off-site drainage to the basin)
Impervious Area -7• 30 ac. (on-site and off-site drainage to the basin)
volumes
Permanent Pool Volume 37, 42-T cu. ft. (combined volume of main basin and forebay)
Temporary Pool Volume cu. ft. (volume detained above the permanent pool)
Forebay Volume A'1A cu. ft. (approximately 20%of total volume)
Other parameters
SA/DA1 0• 02- (surface area to drainage area ratio from DWQ table)
Diameter of Orifice 1,25 X in. (2 to S day temporary pool draw-down required)
Design Rainfall I in.
Design TSS Removal 2 C(Q % (minimum 85% required)
Force SWiJ-102 Rev 3.99 Page i of 4

4
Footnotes:
I When using the Division SAIDA tables,the correct SAIDA ratio for permanent pool sizing should be computed based upon the
actual impervious%and permanent pool depth. Linear interpolation should be employed to determine the correct value for non-
standard table entries.
2 In the 20 coastal counties,the requirement for a vegetative filter may be waived if the wet detention basin is designed to provide
90%TSS removal. The NCDENR BMP manual provides design tables for both 85%TSS removal and 90%TSS removal.
II. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the 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
Rrn-k/ a. The permanent pool depth is between 3 and 6 feet(required minimum of 3 feet).
i\J/A b. The forebay volume is approximately equal to 20% of the basin volume.
M VJ � -c. The temporary pool controls runoff from the design storm event.
(Z V LkJ .d. The temporary pool draws down in 2 to 5 days.
N/Ar 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.
�M,1►J 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).
E-od%T"n - �i. Vegetative cover above the permanent pool elevation is specified.
jZM j. A trash rack or similar device is provided for both the overflow and orifice.
N! k. A recorded drainage easement is provided for each basin including access to nearest right-
of-way.
r,.�A 1. If the basin is used for sediment and erosion control during construction, clean out of the
p basin is specified prior to use as a wet detention basin.
f\(A,bJ in. A mechanism is specified which will drain the basin for maintenance or an emergency.
III. WET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the
vegetated filter if one is provided.
This system(check one) 0 does 0 does not incorporate a vegetated filter at the outlet.
This system(check one) 0 does 0 does not incorporate pretreatment other than a forebay.
Form SWU-102 Rev 3.99 Page 2 of 4

,.r
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 feet in the main pond, the sediment shall be removed.
When the permanent pool depth reads �lA feet in the forebay, the sediment shall be removed.
BASIN DIAGRAM
(fill in the blanks)
Permanent Pool Elevation
Sediment Re oval El. MA75
------1------- - Sediment Removal Elevation ------- 75%
Bottom Ele ation ----------------------- --------------- ----
Bottom Elevation� 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: RA` 13,E 194t w
Title: `
OR amity,
Phone: "'
Signature:
Date: 1 1
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 subdi:::,ion has been named the president.
a Notary PuMc for the State
County of , do hereby certify that
personally appeared before me this�day of jb�M1.t� ,a , and acknowledge the due
execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal,
SEAL
My commission expires 2J ID (O
Form SWU-102 Rev 3.99 Page 4 of 4

Permit No-4* (! !r0 40 3
fto be prvvidsd by DWQ'
HMEHR G
STORMWATER WANAOEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
WET DETENTION BAS'NI SUPP)_-Effi.EWT
This fwm must be 6fled ouf printed and submitted.
The Required Items Checklist(Part ill)mLWbe printed,Oiled out and submitted along with aN of fhe required information.
1. PRO=ffftwm - ------ -- -�
&project name Fcr cd,.-wly Oavnmm'Complex-SW mwmrr Pwmii w4.
Contact person Mark waho�i
Phone number 9 C^?9
Date
Drainage area number 2 -
i. LWORMAT ——Site Characteristics
Drainage area 257.695 If
Impervious area,post-deveiopmerd 43,04n fe
%impervious 16.71 %
Design rainfall depth —..__._..7:1-0 in<- i i O Tf-w n l <'✓ `"�g
Storage Volume: Non-SA Waters
WArnun volume required 4.384 fe •� D14R�►u 4..ry 1
Volume provided 4,M fe OK
OK volume provided is equal to:ir ir•excess of volume required.
Storage Volume: SA Wags
1 runoff volume KAA ft
Pre-development 1-yr,24-hr runoff ft'
Post-development 1-yr,24-hr runoff fe
Minimum volume required fe
Volume provided
Pea,.Flow Calculations
Is the pre/post control of tF.e lyr 24hr ston peak flaw required? _ N or N) E Cj E,V E
1-yr 24-hrakuff depth in
Rational C,pie�cte6eloprriehit ;w,ities�, MAY 15 2017
Rational C,post development --- —(unitiessj
Rainfall intensity:1-yr,24-hrat= in/hr BY:swB Rrv¢v
Pre-devaopnient 1-yr.24-hr peak flow NA ft'isec
Post-development 1-yr,24-hr peak tow —_ NA e/sec
PrelPost 1--yr,24-hr peat flow control #VALUE!tt3lsec
EleYationa
Temporary pod elevation 49.00 fmsi
Permanent pool elevation 4$00 lhul
SHINT elevation(approx at the perm.pool elevation) lmsl
Top of 104 vegetated shelf elevation NA fiml
Bottom of 10f:vegetated shelf elevation NA f nsl.
Sediment deanout,top elevation(bottom of pond) 5rrsl
Sediment deanout bottom elevation find
Sediment shrage provides eft.
Is there additional volume stored above the state-required temp.pool? (Y or N)
Bevation.of the top of the additional volume tmsl
Form WADI-Wet r a"fion Bann-Rev.SWIS`:2 Parts I.8 b.Design Summary,rage 1 of?

Permit No.
X be provJdeC rrl DWG?,-
griFtAl'tfATM
Surface Areas
Area,temporary pool 55,634 fe
Area REQUIRED,pemraaent,pool 3,092 f?
SAIDA.ratio 1.20*Awse)— dfj
Area PROVIDED,permanent pool,A,,,. � 4,242 if OK
Area,bottom of 10ft vegetated shelf,&e 4,d NA T ft`
Area,sediment cteanout,top elevation(bottom of pond),Ab,,; NA ftt
volumes
Volume,temporary pool Ma fe OK
Volume,permanent pool,V,..,,o: 12,6;i fe
Volume,forebay(sum of`:,mbays if more that,one forebay) 2?6FT le
Forebay%of permanen pool volume 21.9%% OIz
SAIDA Table Data
Design TSS removal 55%
Coastal SAIDA Table Used? 'ram F__ 1Y or N)
�i%untairedmont SAIDA Table Used? �.Nn.. ...(Y or N)
SAIDA ratio 1.20(unitless)
Average de.0h(used in SAIDA table):
Cakvlaticrt option 1 used?(See Figure 10 2b) N (Y or N)
Volume,permanentpoci,Vim. ., 12,650 fe
Area provided,pen,wrient pool,A,,• 4 242 it'
Average depth calculated NA_ft OK
Average depth used in SAIDA,d6,(Round to nearest 0.5ft) hA T4 it #VALUE'
Calculation option 2 used?(See Figure 10-2b) ,N (Y or N)
Area provided,permanent pool,Aa,„,p" 4,242 ft`
Area,bottom of 1 Oft vegetated shalt,A,,,.,—; NA fe
Area,sediment cleanout,top elevation(bottom of pond),A,,oaM NA 112
"Depth"(distance b/w bottom of 10ft shelf and top of sediment) It
-Avepiive4apth calculated 5.00 a OK
Average depth used in SAIDA,d,,,(Re nd to down to rearest 0,511) 5.0 ft OK
Drawdown Calculations
Drawdown through orifice? Y (Y or N)
Diameter of orifioe(if circular) 0.5 in
Area of orifice('rf non circular) M=
Coefficient of discharge(C:)) 0.60(urnidess)
Driving head(H,) 0 50 it
Drawdown through weir? N (Y or N)
Weir type (unities)
Coefficient of dischage(C�) (unitess)
Length of weir(L) ft
Driving head(H) R
Pre-development f-y,24-hr peak fow NA ieisec
Post-development 1-jr.24-W peak flow NA I&M
Storage volume discharge rate(through diischar3e orifice ur welr) 0.tf2 felsee
Ste-age volume drawdown tone 3 20 days OK,draws down in 2-5 days.
Additional tnformaflon.
'legetaied side slopes :1
Vegetated st>elf dope NA:1 OK
Vegetated shelf width f\'A ft OK
Legth of impath to width ratio :1
Length to width ratia ;1
Trash rack for overf v&orifice? _("or N)
Freeboard provided it
Vegetated filter provided? (Y or N)
Recorded drainage easement provded? (Y or N)
Capures all runoff at ultimate buuil"ut? (Y or N)
Drain meohwIsm for maintenance or emergencies is:
Form SW401 Wei Detention•Saso-Rev.9411&12 Par.'s L&H.D•.sign Summary,Page 2 u?2

Permit No. SW P ?/0 03 AId.
(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: AwdawaNfy "4"f1rW 6&r (5471wow
Contact Person: /Q• AlAfA 6G`4 rwl Phone Number: (9w )2_57-4fD00
For projects with multiple basins,specify which basin this worksheet applies to: '0040 .r
elevations
Basin Bottom Elevation 3 ft. (floor of the basin)
Permanent Pool Elevations ft. (elevation of the orifice)
Temporary Pool Elevation ft. (elevation of the discharge structure overflow)
areas
Permanent Pool Surface Area /7 0&9 sq. ft. (water surface area at the orifice elevation)
Drainage Area . 9Z ac. (on-site and off-site drainage to the basin)
Impervious Area 00 ac. (on-site and off-site drainage to the basin)
volumes
Permanent Pool Volume 030 cu. ft. (combined volume of main basin and forebay)
Temporary Pool Volume N 1 0 S cu. ft. (volume detained above the permanent pool)
Forebay Volume /0., 633 cu. ft. (approximately 20%of total volume)
Other parameters
SA/DA1 . 0000 (surface area to drainage area ratio from DWQ table)
Diameter of Orifice in. (2 to 5 day temporary pool draw-down required)
Design Rainfall / in.
Design TSS Removal 2 % (minimum 85% required)
Dorm SVIJ-102 Rev 3.43 Page 1 of 4

Footnotes:
I When using the Division SA/DA tables,the correct SA/DA ratio for permanent pool sizing should be computed bascd 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%b TSS removal. The NCDENR BMP manual provides design tables for both 85%TSS removal and 90%TSS removal.
II. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Stormwater Best Management Practices Manual
(N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code
Section: 15 A NCAC 2H .1008.
Initial in the space provided to indicate the following design requirements have been met and supporting
documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit
Application Form, the agent may initial below. If a requirement has not been met, attach justification.
Applicants Initials
R 'LN) a. The permanent pool depth is between 3 and 6 feet(required minimum of 3 feet).
b. The forebay volume is approximately equal to 20%of the basin volume.
c. The temporary pool controls runoff from the design storm event.
iVo.) .d. The temporary pool draws down in 2 to 5 days.
rvA L-) e. If required, a 30-foot vegetative filter is provided at the outlet(include non-erosive flow
calculations)
f. The basin length to width ratio is greater than 3:1.
g. The basin side slopes above the permanent pool are no steeper than 3:1.
Ar h. A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail).
Np'v" V\/ i. Vegetative cover above the permanent pool elevation is specified.
w j. A trash rack or similar device is provided for both the overflow and orifice.
1✓ k. A recorded drainage easement is provided for each basin including access to nearest right-
of-way.
t* A' 1. If the basin is used for sediment and erosion control during construction, clean out of the
basin is specified prior to use as a wet detention basin.
m. A mechanism is specified which will drain the basin for maintenance or an emergency.
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 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 3.75 feet in the main pond, the sediment shall be removed.
When the permanent pool depth reads 2-ZK feet in the forebay,the sediment shall be removed.
BASIN DIAGRAM
(fill in the blanks)
Permanent Pool Elevation LIE
Sediment Re oval El.*Z 1 75
------..------ - Sediment Removal Elevation 39.2
BottomEle ation 5' --------------------------------------------- -- --
Bottom Elevation 41:5 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 nameRm,) ��f'r
1 _� ulity H&Mclev%
Title: , _�
Address: �� 1701C JC' k�Gtlr.7GtV11.. 1 Z A gA
Phone: J'
Signature:
Date: 11 bg b4--�
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 subdi vi,;ion has been named the president.
a Notary Pub hfor the State of 4
y certify do hereby a- --
County �f fy that
personally appeared before me this day of BzJ ,�lo ,and acknowledge the due
execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal,
SEAL
My commission expires— .Jr/
Form SWU-102 Rev 3.99 Page 4 of 4

State Stormwater Management Systems
Permit No. SW8 910403 Modification
Pender County Government Complex `MS✓
Stormwater Permit No. SW8 910403 mod.
Pender County
Designer's Certification
i, R M,4r 1n)a��d�n , as a duly registered �ro a io�►�,1 �`"JI "in the
State of North Carolina, having been authorized to observe (periodically/weekly/full
time) the construction of the project,
ar t2jji
(Project)
for e h 6 l h (Project Owner) hereby state that, to the
best of my abilities, due care and dili ence was used in the observation of the project
construction such that the construction was observed to be built within substantial
compliance and intent of the approved plans and specifications.
The checklist of items on page 2 of this form is included in the Certification.
Noted deviations from approved plans and specification:
SEAL
Signature �
Registration Number
Date 3/z 1 ! %3
, =IVE
MAR 17
BY:
Page 6 of 7

State Stormwater Management Systems
Permit No. SW8 910403 Modification
Certification Requirements:
vo'�1. The drainage area to the system contains approximately the permitted
acreage.
_Z: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.
_Le�'6. The outlet structure is located per the approved plans.
✓ 7. Trash rack is provided on the outlet/bypass structure.
P✓8. All slopes are grassed with permanent vegetation.
9. Vegetated slopes are no steeper than 3:1.
0. The inlets are located per the approved plans and do not cause short-
circuiting of the system.
✓11. The permitted amounts of surface area and/or volume have been
provided.
�12. Required drawdown devices are correctly sized per the approved plans.
13. All required design depths are provided.
14. All required parts of the system are provided, such as a vegetated shelf,
and a forebay.
✓ 15. The required system dimensions are provided per the approved plans.
cc: NCDENR-DWQ Regional Office
Pender County Building Inspections
Page 7 of 7