SW7070207_CURRENT PERMIT_20070709

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW 7y rD�Dy
DOC TYPE
CURRENT PERMIT
❑ APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
Q7Q9
YYYYM M D D

iJ�R 0
Michael F. Easley, Governor
i William G. Ross Jr., Secretary
rNorth Carolina Department of Environment and Natural Resources
1
Coleen H. Sullins, Director
Division of Water Quality
July 9, 2007
Mr. Richard Miler
R.C. Miller Group, LLC
P.O.-Box 51
Aydlett, NC 27916
Subject: Stormwater Management Permit No. SW7070207
Colingwood Group Development
High Density Stormwater Project
Dare County
Dear Mr. Miller:
The Washington Regional Office received a completed Stormwater Application for the subject project on
July 9, 2007. Staff review of the plans and specifications has determined that the project, as proposed, will
comply with the Stormwater Regulations set forth in Title 15A NCAC 2H.1000. We are forwarding Permit
No. SW7070207 dated July 9, 2007 to R.C. Miller Group, LLC for the construction and operation of two
infiltration basins to serve the Colingwood Group Development located at the intersection of Colingwood
Road and Colingwood Lane, approximately 3.6 miles west of US Hwy 158. and at the intersection with
Colingwood Lane, in Kill Devil Hills, NC. Approved copies of the plans and application and supplement
forms are also enclosed with this original version of the permit.
This permit shall be effective from the date of issuance until July 9, 2017, and shall be subject to the
conditions and limitations as specified therein. Please pay special attention to the Operation and
Maintenance requirements in this permit. Failure to establish an adequate system for operation and
maintenance of the stormwater management system will result in future compliance problems. Please
note also the inclusion of a Designer's Certification immediately following the permit.
If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to
request an adjudicatory hearing upon written request within thirty (30) days following receipt of this permit.
This request must be in the form of a written petition, conforming to Chapter 150E of the North Carolina
General Statutes, and filed with the Office of Administrative Hearings, 6714 Mail Service Center, Raleigh,
NC 27699-6714. Unless such demands are made this permit shall be final and binding.
If you have any questions, or need additional information concerning this matter, please contact me or
Treva Maxwell -Anderson at [phone].
Si cerel ,
AT o _ I Supervisor
Surface Water Protection Section
Washington Regional Office
AH/tma: J:/wpdata/wqs/state sw-tma
c: Mitch Halloran, Coastal Eng. & Surveying, Inc. (permit)
Dare County Planning / Inspections (permit)
Central Files (permit)
,,.,,Washington Regional Office (permit, approved plans, applications and supporting documentation)
North Carolina Division of Water Quality Washington Regional Office Phone [phone] FAX [phone] Customer Service
Internet: h2o.enr.state.nc.us 943 Washington Square Matt, Washington, NC 27889 1-877-623-6748
An Equal Opportunity/Aff rmative Action Employer- 50% Recycled/10% Post Consumer Paper N'os�hCarolina
�vatura!!y

State Stormwater Management
Permit No. SW7070207
Colingwood Group Development
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
STATE STORMWATER MANAGEMENT PERMIT
HIGH DENSITY DEVELOPMENT
In accordance with the provisions of Article 21 of Chapter 143, General Statutes of North Carolina as
amended, and other applicable Laws, Rules, and Regulations
PERMISSION IS HEREBY GRANTED TO
R.C. Miller Group, LLC
Colingwood Group Development
Dare County
FOR THE
construction, operation and maintenance of stormwater management systems in compliance with the
provisions of 15A NCAC 2H.1000 (hereafter referred to as the "stormwater rules') and the approved
stormwater management plans and specifications and other supporting data as attached and on file with
and approved by the Division of Water Quality and considered a part of this permit.
This permit shall be effective from the date of issuance until July 9, 2017 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. The approved plans and specifications are incorporated by
reference and are enforceable parts of this permit.
2. The permitted stormwater collection system shall be comprised of two infiltration basins. The system
has been approved and will be limited to handle the runoff from 27,178 square feet of built upon area
on a project site of 2.19 acres, as indicated in Section 1.6 of this permit and on the approved plans.
4. The runoff from all built -upon area within the permitted drainage area of this project must be directed
into the permitted stormwater control system.
5. 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
Page 1 of 4

State Stormwater Management
Permit No. SW7070207
Colingwood Group Development
6. The following design criteria have been provided in the infiltration basins and must be maintained at
design condition:
Receiving Stream: Kitty Hawk Bay
Stream Index Number: 30-19
Classification of Water Body:
SC
Total Site Area:
2.19 ac
Type of Soil:
Sandy Loam
Design Storm, inches:
1.0
DA1
DA2
Drainage Area to Basin:
68,842 sf
24,011 sf
Impervious Area in Drainage Basin:
27,178 sf
0 sf
Infiltration Basin Depth (to overflow):
1.9 ft
0.4
Basin Bottom Elevation, FMSL
6.5
7.0
Bypass Overflow Elevation, FMSL:
8.4
7.4
Provided Storage Volume:
7612 cf
576
Required Storage Volume:
2326 cf
100 cf
Expected Infiltration Rate
30 in/hr
30 in/hr
TimeTime to Draw Down:
0.5 hrs
0.1 hrs
7. The following items will require a modification to the permit:
a. Any revision to the approved plans, regardless of size
b. Project name change
c. Transfer of ownership
d. Redesign or addition to the approved amount of built -upon area
e. Further subdivision of the project area.
8. In addition, the Director may determine that other revisions to the project should require a modification
to the permit.
9. 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.
Page 2 of 4

State Stormwater Management
Permit No. SW7070207
Colingwood Group Development
II. SCHEDULE OF COMPLIANCE
The permittee will comply with the following schedule for construction and maintenance of the
stormwater management system.
a. The stormwater management system shall be constructed in its entirety, vegetated and
operational for. its intended use prior to the construction of any built -upon surfaces except roads.
b. During construction, erosion shall be kept to a minimum and any eroded areas of the system will
be repaired immediately.
2. The facilities must be properly maintained and operated at all times. The approved Operation and
Maintenance Plan must be followed in its entirety and maintenance must occur at the scheduled
intervals.
3. The permittee shall at all times provide the operation and maintenance for the infiltration basins
necessary to assure the permitted stormwater system functions at optimum efficiency including, but not
limited to:
a. Semiannual scheduled inspections (every 6 months)
b. Sediment removal
c. Mowing and revegetation of side slopes
d. Immediate repair of eroded areas
e. Maintenance of side slopes in accordance with approved plans and specifications
f. Debris removal and unclogging of outlet structure, orifice device and catch basins and piping.
4. Records of maintenance activities must be kept and made available upon request to authorized
personnel of DWQ: The records will indicate the date, activity, name of person performing the work
and what actions were taken.
5. This permit shall become voidable unless the facilities are constructed in accordance with the
conditions of this permit, the approved plans and specifications, and other supporting data.
6. Upon completion of construction and prior to operation of this permitted facility, a certification must be
received from an appropriate designer for the system installed certifying that the permitted facility has
been installed in accordance with this permit, the approved plans and specifications, and other
supporting documentation. Mail the Certification to the Washington Regional Office, 943 Washington
Square Mall, Washington, North Carolina, 27889, attention Division of Water Quality.
7. A copy of the approved plans and specifications shall be maintained on file by the Permittee for the life
of the project.
III. GENERAL CONDITIONS
1. This permit is. not transferable- In the event there is a desire for the facilities to change ownership, or
there is a name change of the Permittee, a formal permit request must be submitted to the Division of
Water Quality accompanied by an application fee, documentation from the parties involved, and other
supporting materials as may be appropriate. The approval of this request will be considered on its
merits and may or may not be approved.
2. Failure to abide by the conditions and limitations contained in this permit may subject the Permittee to
enforcement action by the Division of Water Quality, in accordance with North Carolina General
Statute 143-215.6(a) to 143-215.6(c).
Page 3 of 4

State Stormwater Management
Permit No. SW7070207
Colingwood Group Development
N
3. The issuance of this permit does not preclude the Permittee from complying with any and all statutes,
rules, regulations, or ordinances that may be imposed by other government agencies (local, state, and
federal) which have jurisdiction.
4. In the event that the facilities fail to perform satisfactorily, including the creation of nuisance conditions,
the permittee shall take immediate corrective action, including those as may be required by this
Division, such as the construction of additional or replacement stormwater management systems.
5. The permittee grants DENR Staff permission to enter the property during normal business hours for
the purpose of inspecting all components of the permitted stormwater management facility
6. The permit may be modified, revoked and reissued or terminated for cause. The filing of a request for
a permit modification, revocation and reissuance or termination does not stay any permit condition.
7. An application for permit renewal must be submitted at least 180 days prior the expiration of this permit
along with the appropriate processing fee.
Permit issued this the 9th day of July, 2007.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
far
Coleen H. Sullins, Director
Division of Water Quality
By Authority of the Environmental Management Commission
Permit Number SW7070207
Page 4 of 4

State Stormwater Management
Permit No. SW7070207
Colingwood Group Development
Designer's Certification
as a duly
registered Professional Engineer in the State of North Carolina, having been authorized to observe
(periodically/weekly/full time)
the construction of the project,
for
(Project 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.
Signature
Registration Number
Date
Certification Requirements:
1. The drainage area to the system contains approximately the permitted acreage.
2. The drainage -area to the system contains no more than the permitted amount of built -
upon area.
3. All the built -upon area associated with the project is graded such that the runoff drains to
the Basin 1 of the system.
4. All roof drains are located such that the runoff is directed into Basin 1 of the system.
5. The outlet/bypass structure elevations are per the approved plan.
6. The outlet/bypass 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. All required design depths are provided.
13. All required parts of the system are provided.
14. The required system dimensions are provided per the approved plans.

� rr,5 rnc,C
r'�SwSµrtE,-,r S/LZ
State of North Carolina
DepartmentofEnvironment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This form may be photocopied for use as an original
I. GENERAL INFORMATION
1. Applicants name (specify.the name of the corporation, individual, etc. who owns the project):
R.C. MILLER GROUP LLC
2. Print Owner/Signing Officials name and title (person legally responsible for facility and compliance):
RICHARD MILLER - OWNER
3. Mailing Address for person listed in item above:
P.O. BOX 51
City: AYDLETT State: ,NC _ Zip: 27916
Telephone Number: ( 252 ) 441-4358
4. Project Name (subdivision, facility, or establishment name -should be consistent with project name on plans,
specifications. letters, operation and maintenance agreements, etc.):
COLINGWOOD GROUP DEVELOPMENT
5. Location of Project (street address):
NA - (VACANT LAND SOUTH OF COLINGWOOD LANE AT INTERSECTION OF COLINGTON ROAD)
City: KILL DEVIL HILLS County: DARE
6. Directions to project (from nearest major intersection):
FROM US HWY 158, WESTERLY ON COLINGWOOD ROAD FOR APPROX. 3.6 MILES TO
INTERSECTION OF COLINGWOOD LANE.
7. Latitude: 36' 00' 28.7" N Longitude: 750 42' 24.5" W of project
S. Contact person who can answer questions about the project:
Name: MITCH HALLORAN Telephone Number: ( 252 261-4151
COASTAL ENG. & SURVEYING, INC.
Il. PERMIT INFORMATION:
1. Specify whether project is (check one): X New Renewal Modification
Form SWU-101 Version 3.99 Paae I of

2. If this application is being submitted as the result of a renewal or modification to anexisting permit, list the
existing permit number and its issue date (if known)
3. Specify the type of project (check one):
_Low Density X High Density _Redevelop _General Permit _Other
4. Additional Project Requirements (check applicable blanks):
_LAMA Major X Sedimentation/Erosion Control _404/401 Permit _NPDESStormwater
Information on required state.permits can be obtained by contacting the Customer Service Center at
1-877-623-6748.
III. PROJECT INFORMATION
1. .In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative
(one to two pages) describing stormwater management for the project.
STORM WATER FROM IMPERVIOUS ON -SITE IMPROVEMENTS WILL BE COLLECTED &
CONVEYED THROUGH GRASS SWALES AND INTO AN INFILTRATION BASIN
2. Stormwater runoff from this project drains to the
3. Total Project Area: 2.19 ACS. acres
5. How many drainage areas does the project have? i 2
PASQUOTANK River basin.
4. Project Built Upon Area: 27.7 %
6. Complete the following information for each drainage area. :If there are more than two drainage areas in the
project. attach an additional sheet with the information for each area provided in the same format as below.
Basin Info rmation ;;
'. ;;, 'Drainage Area 1
Receiving Stream Name
KITTY HAWK BAY /
KITTY HAWK BAY,
Receiving stream Class
WS-1 WATERS
WS-1 WATERS
Drainage Area
68 842 SF
24,011 SF o. ss «.
Existing Impervious* Area
0
0
Proposedlmpervious"Area
27,178SF -
0
96Impervious' Area (total)
39.5% -
0%
di ipervious'Surface Area ;.
" ; Drainage Area:L
`-Drainage'Area 2 , i >'i?
On -site Buildings
11 520± SF.
0
On -site Streets
10918±SF ,orLjdtwf)
'0
On -site Parking
4,740± SF
0
On -site Sidewalks
0 - - ..
0
Other on -site
0
0
Off -site
0 -
0
Total: 27,178± SF
Total: 0
Impervious area is defined asthe built upon area including; but not limited to, buildings, roads,parkingareas,
sidewalks, gravel areas, etc.
Form SWU-101 Version 3.99 Pase?of4

T. How was the off -site impervious area listed above derived? N/A
IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
The following italicized deed restrictions and protective covenants are required to be recorded for all
subdivisions, outparcels and future development prior to the sale of any lot. If lot sizes vary significantly, a table
.listing each lotnumber, sizeand the allowable built -upon area for each lot must be provided as an attachment.
1. The following covenants are intended to ensure ongoingcompliance,with state stormwatermanagement permit number
as issued by the Division of Water Quality. These covenants maynot be
changed or deleted without the consent of the State.
-2. No more. than 30% square feet of any lot shall he covered by structures or impervious materials.
Impervious materials include asphalt, gravel, concrete. brick, stone. slate or similar material but do not include stood
decking or the water surface of swimming, pools.
3. Stva/es shall not be filledin, piped, or altered except as necessary: to provide driveway crossings.
4. Built -upon area in excess of the permitted amount requires a state stormwaier management permit modification prior to
construction.
a. All permitted runoff from outparcels or future. development shall be directed into the permitted stormwater control
Sys tem. These connections to the siorrnwater control system shall be performed in a manner that maintains the integrity
and performance of the system as permitted.
By your signature below, you certify that the recorded deed restrictions and protective covenants for this project
shall include at) the applicable items required above, that the covenants will be binding on all parties and persons
claiming under them, that they will run with the land.that the required covenants cannot be changed or deleted
without concurrence from the State. and that they will be recorded prior to the sale of any lot.
V. SUPPLEMENT FORMS
The applicable state stormwater management permit supplement form(s) listed below MUST be submitted for each
BMP specified for this project. Contact the Stormwater and General Permits Unit at [phone] for the status
and availability of these forms.
Form SWU-102
Wet: Detention Basin Supplement'
. Form SWU-103
Infiltration Basin Supplement
Form SWU-104
Low Density Supplement
Form SWU-105
Curb Outlet System Supplement
Form SWU-106
Off -Site System Supplement
Form SWU-107
underground Infiltration Trench. Supplement
Form SWU-1.08
Neuse River Basin Supplement
Form SW'U-109
Innovative Best Management Practice Supplement
Form SWU-101 version 3-.99
Page.3 of 4

VI. SUBMITTAL REQUIREMENTS
Only completeapplication packages will be accepted and reviewed by the Division. of Water Quality (DWQ).
A completepackage includes all of the items listed below. The complete application package should be
submitted to the appropriate DWQ Regional Office.
1. Piease.indicate that, you haveprovided the following required information by initialing in the space provided
next toeach item.
Initials111���,,,��(
• Original and one ropy of the Stormwater Management Permit Application Form
• One copy of the applicable Supplement Form(s) for each BMP H.
• Permit application, processing fee. of $420 (payable to NCDENR)
• Detailed.namativedescription ofstormwatertreatment/ management
• Two copies of; plans and specificationsJncluding:
-Development/Projectname: -
-:Engineer and firm
-Legend
- North arrow
- Scale
- Revision number .&date
- Mean high water line
- Dimensionedproperty/project boundary
- Location map with named streets or NCSR numbers
- Original contours,. proposedcontours, spot elevations,finished floor elevations
- Details of roads,drainage features, collection systems, and stormwater control measures
-Wetlands delineated. ora-noteon plans that none exist
- Existing drainage (including off -site), drainage easements. pipe sizes, runoff calculations
- Drainage areas delineated
- Vegetatedbuffers (where required)•
VIL AGENT AUTHORIZATION
If you wish to designate authority to anothenindividual or firm so that they may provide information on your
behalf, please complete this section.
Designated agent (individual orfirm): COASTAL ENGINEERING & SURVEYING, INC.
Mailing Address: P.O. BOX 1129
City: KITTY HAWK State: NC zip: 27949
Phone:.0 252 ) 2614151 - Fax: ( 252 ) .261 1333
VIII. APPLICANT'S CERTIFICATION
I./print or type name ofperson listed inGeneral Information. item 2) . RICHARD MILLER
certify that the information included on this permit application form is. to the best of my knowledge, correct and
:that thepr ect ill be. constructed in conformance with the approved.plans, thattherequired deed restrictions
and orotec ive v mant-s will be recorded, and that the proposed project complies with the requirements of 15.A
NCAC2H 10 / �f
Signature: Date:
FormSWU-101 Version3.99 Page 4of4

re.S�.rtNn�' S�/zZ
Permit No
110 he provided by D{PO)
State of North. Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
INFILTRATION BASIN SUPPLEMENT
This form rnty be, phororopied for use as an original
DWO Storinwater Management Plan Review
A complete siormwater management plan submittal includes a stotmwater managemcnt permit application, an
infiltration .basin supplement for each system; design calculations, soils report and plans and specifications
showing all stonnwater conveyances and systcm details.
1. PROJECT INFORMATION
Project Name: COLINGWOOD GROUP DEVELOPMENT
Contact Person: MITCH HALLORAN
This worhshect applies to: Basin No. #2
Gu !r!•:,rired nn
Phone N umber: , 252 ) 2614151
in Dminagc Area #2
!!i'anI Famv.S'ii'GJ U!/
11. DESIGN INFORMATION -Attach supporfingcalculationsidocumentation. The soils report must be
based upon an actual field investigation and soil borings. County soil maps are not an acceptable source
of soils information, All elevations shall be infeet mean sea level (fins(}.
Soils Report Summar%
Soil Type SAND LOAM
Infiltration Rate 30 In/hr or cf/hr/sf (ure(e appropriate un(tr)
SHWT Elevation 3.2 fnisl (sctrsona/lligh waet-1 Tnhle clevuriora
Basin Design Parameters
Design Storm
1.5 , inch
Dcsimi Volume
150 c;f.
Drawdotvn Time
0 days
Basin Dimensions
Basin Size
Basin Volume Provided
Basin Elevations
Bottom Elevation
Storage Elevation
Top Elevation
Form SWU-103 Rev 3.99
N. 5 inch enem fi,, SA waters. f inch even( for others)
l ": ,lad'Y3
35.8± ft. , 20±
576 c.f.
7.0
fmsl
7.40 .
fmsl
7.80 .
fins(
Poet i of I
ft.= 716 sq. ft. (bonom dimension.0

III. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Mnmwater Best Management Practices Manual
(N.C. Department of Environment, Health_ and Natural Resources- Febmary 1999) and Administrative Code
Section: I A NCAC 2H .1008.
Initial in the space provided to indicate that the following design. requircments have been met and supporting
documentation is attached. if the applicant has designated an agent in the Stotmwater .Management Permit
Application Fonn,.the agent may initial below. Attach justification if a requirement has not been met
Applicalntsanitials
t a.
— b.
c.
d.
^n\1 C.
1VIYt f.
\nn�I
�� 14 —
System is located 50 feet from class`SA waters and 30 feet from other surface waters.
System is located at least 100'feet from water supply wells.
Bottom of system is at least' feet above the seasonal high water table.
Bottom of the system is 3 feet above any bedrock or impervious soil horizon.
System is not sited on or in fill,material or DWQ approval has been obtained.
System is located in a recorded drainage easementfor the purposes of operation and
maintenance and has recorded access easements to the nearest public right-of-way.
g. Drainage area for the device is less than.5 acres.
h. Soils have a minimum hydraulic conductivity of 0.52 inches per hour and soils report is
attached.
i.
System captures and infiltrates the'runofffrom the first 1.0 inch of rainfall (l.i inch event for
areas draining* to SA waters ). Design volume and infiltration calculations attached.
j.
System is sized to take into account the runoff at the ultimate built -out potential from all
surfaces draining to the system, including any off -site drainage. Calculations attached.
l I
k.
All side slopes stabilized with veGctated cover are no steeper than 3:1 (A:V).
n(M
I.
A pretreatment device such as a catch basin, arcane trap, filter strip, Grassed swale or
sediment trap is provided.
in.
Bottom of the device is covered with a laver of clean sand to an average depth of 4 inches or
dense vegetative cover is provided.
n.
Vegetated filter is provided for OVCrPOw and detail is shown or. plans (Required minimum
length is 50 feet for SA waters-10 feet forotherwaters).
o.
Flow distribution mechanism within the basin is provided.
�VpVI1 1t
i 1
11n�1 p.
A benchmark is provided to determine the sediment accumulation in the pretreatment device.
Y� q.
Runoff in excess of the design volume bvnasses off-line systems (bynass detail provided).
STORE
n A I
1 VL
(INFILTRATIPN BASIN ABl E TQ 3.84 TIMES REQUIREDVOLUME
System is designea
r.
to craw gown t ie aesign storage volume to.the propose bottom
eievation under seasonal high water conditions within five days. A soils report and all
pertinent draw -clown calculations are attached.
s. Plans ensure that the installed system will meet design specifications (constructed or
restored) upon initial operation once the project is complete and the entire drainage area is
stabilized.
Form'SWU-.103 Re\13.99 Page2of 3

IV. INFILTRATION BASIN OPERATION AND NIAINTEtN'.ANCE AGREEMENT
1. After even, runoff producing rainfall event and at least monthly inspect the infiltration system for erosion.,
trash accumulation. vc2ctative cover, and ,eneral condition,
2. Repair eroded areas immediately, re -seed as necessary to maintain adequate vegetative cover, mow
vegetated cover to maintain a maximum height of six inches, and remove trash as needed.
3. After every, runoff producing rainfall event and at least monthly inspect the bypass, inflow and overflow
structures for blockage and deterioration. Remove any blockage and repair the structure to approved design
specifications.
4. Remove accumulated sediment from the pretreatment system and infiltration basin annually or when depth
.in the pretreatment unitis reduced to 75%•ofthe original design depth. The system shall be restored to the
original design depth without over -excavating. ,Over -excavating may cause the required water table
separation to be reduced and may compromise the ability of the system to perform as designed. Removed
sediment shall be disposed of in an appropriate manner and shall not be handled in a manner that will
adversely impact water quality (i.e. stockpiling near a storntw•ater treatment device or stream, etc.).
A benchmark shall be established in the pretreatment unit. The benchmark will document the original
design depth so that accurate sediment accumulation readings can be taken. The measuring device used to
determine the depth at the benchmark shall be such that it will give an accurate depth reading and not
readily penetrate into accumulated sediment
When the design depth reads 7.10 feet inAhe pretreatment unit, the sediment shall be
removed from both the pretreatment unit and the infiltration basin.
5. If the Division determines that the system is failing: the system will immediately be repaired to original
design specifications. if the system Cannot. be repaired to perform its design function, other stortttwater
control devices Lis allowed by NCAC 2H .1000 must.be,designed, approved and constructed.
l acknowledgeand.aeree by my signature below that I am responsible for the performance of the five
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 and Title: RICHARD MILLER - OWNER
Address:,1�902 W. 3RD. STREET - KILL DEVIL HILLS, NC 27948
Note: Thr legally reepnnsibfe pug r�• sbmdd not he o lmmeoIt necv rn'suciadon unless more rhmr 5U% gfihe loa have been sold and a
reaiderr of the subdivisimr has hecr, named the prevident
I- • J,,�� I I \ • a Nola 'Public ,for
�thei rate of �w�i'rfl Cott/ lion - Comm of
�711d�. do hereby ccnify ihm �t(i) i�lX 1 t 11 �� personallyappemed beL,ire me his
day of. ibi sand acknowledge the due execution of the forgoing infihmt ion basin maintenance requircmems.
�\ itncss imv han a �a 1141 S bn9 � Commtsston E>�ir2s 6.2T•2007.
\ .�Y1t/ tea...\7� �Y
SEAL
My commission expires
t d �
V
Form S"U-111. t j_r4 Pagc3nf.3
�/CK COJ

Or,, jl n
fts' 't {feel S-/Lz
Permit No.
0o he provided lm UA'OI
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
INFILTRATION BASIN SUPPLEMENT
This form. ma-v I& phowcapied for use as an original
DWO Stormwater Manasemcm Plan Review:
A complete stontlwater management plan submittal includes a stormwater management permit application, an
infiltration basin supplement for each system, design calculations; soils report and plans and specifications
showing all stonnwater conveyances and system details.
I. PROJECT INFORMATION
Project Name : COLINGWOOD GROUP DEVELOPMENT
Contact Person: MITCH HALLORAN
Phone Number: (252 1261 4151
This worksheet applies to: Basin No. #1 in Draina-e Area #1
/u• idcIvan S41,401)
It. DESIGN INFORMATION - Attach supporting calculations/documentation. The soils report must be
based upon an actual field investieation and soil borings. County soil maps are not an acceptable source
of soils information. All elevations shall he in feet mean sea level (ftrsl).
Soils Report Summarc
Soil Type
Infiltration Rate
SH WT Elevation
Basin Design Parameters
Design Storm
Design Volume
Drawdown fmle
Basin Dimensions
Basin Size
Basin Volume Provided
Basin Elevations
Bottom Elevation
Storage Elevation
Top Elevation
Form MVU-1(13 Rev3.o0
CT Fly& Ke ME A
30 in/hr or cf/hr/sf (circle appruprinitt rrni!s)
3.2 fmsl (Serrs»nal lit h Hiner Table elcwtiont
1.5 inch (I. i inch erect! fbr SA wcrF rs, ! ii 'h cairn! jirr nrhersl
3,489.4 c.f. 94b9 6,> = Z?Z&
0.94 days
88± ft. X 39± ft. = 3,436 sq. ft. (bomorn diu+ensions)
7,612 c.f. (TO OVERFLOW SPILLWAY)
6.5D fmsl
8.4 fms] Z
'm finsl rt( ro-p o� rtF(o�
Pace I of 3

Ill. 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 19991 and Administrative Code
Section: 15 A NCAC 2H .1009.
Initial in the space provided to indicate that the following design requirements have been met and supporting
documentationcis attached. If the applicant has designated an agent in the Stormwater Management Permit
Application Form, the agent mav initial below. Attach justification if a requirement has not been met.
Applicants Initials
a. System is located 50 feet from class SA waters and 30 feet from other surface waters.
b. Svstem is located at least 100 feetfrom water supply wells.
c. Bottom of system is at least 2 feet above the seasonal high water table.
d. Bottom of the system is 3 feet above any bedrock or impervious soil horizon.
_ e. System is not sited on or in till material or DWQ approval has been obtained.
f. System is located in a recorded drainage casement for the purposes of operation and
maintenance and has recorded access easements to the nearest;Public right -of --way.
0 g Drainage area for the device is less than 5 acres.
M U It, Soils have a minimum hydraulic conductivity of 0.52 inches per hour and soils report is
attached.
H i. System captures and infiltrates the runoff from the first 1.0 inch of rainfall (1.5 inch event for
areas draining to SA waters ). Design volume and infiltration calculations attached.
M j. System is sized to take into account the runoff at the ultimate built -out potential from all
surfaces draining to the system, including any off -site drainage. Calculations attached.
1n n k. All side slopes stabilized with vegetated cover are no steeper than 3i 1 (H:V ).
1. A pretreatment device such as a catch basin, grease trap, filter strip,.grassed swi le or
�p sediment.trap is provided.
V t' m. Bottom of the device is covered with a layer of clean sand to an average depth of 4 inches or
MI� ndense vegetative cover is provided.
I . Vegetated filter is provided for overflow and detail is shown on plans (Required minimum
A 4 length is 50 feet for SA waters, 30 feet for other waters).
�/I o. Flow distribution mechanism within the basin is provided.
_ p. A benchmark is provided to determine the sediment accumulation in the pretreatment device.
q. Runoff in excess of the design volume bypasses off-line systems (by pass detail provided).
(INFILTRPTIQN BA�IN ABLE TO STORE 2.18 TIMES REQUI♦ ED (bypass
r. Svstem is vest mega to acraw ownthc design storage vol ume tot c propose bottom
elevation under seasonal high water conditions within five days. A soils repot and all
Pertinent draw -clown calculations are attached
_�_ s. Plans ensure that the installed system will meet design specifications (constructed or
restored} upon initial operation once the project is complete and the entire drainage area is
stabilized.
Form Swtl-10_ Rev a:99 Page 2 of

IV. INFILTRATION BASIN OPERATION .AND MAINTENANCE AGREEMENT
I. After every runoff producing rainfall event and at )cast monthly inspect the infiltration system for erosion,
trash. accumuiation. vegetative cover, and general condition.
2. Repair eroded areas immediately, re -seed as necessary to maintain adequate vegetative cover, mow
vegetated cover to maintain a maximum height of six inches, and remove trash as needed,
1 After every runoff producing rainfall event and at least monthly inspect the bypass, inflow and overflow
structures for blockage and deterioration. Rcmovc any blockage and repair the structure to approved design
specifications.
4. Remove accumulated.sediment from the pretreatment -system and infiltration basin annually or when depth
in the pretreatment unit is reduced to 75% of the original design depth. The system shall be restored to the
original -design depth withoutover-excavating. Over -excavating may cause the required water table
separation to be reduced -and mav compromise -the ability of the system to perform as designed. Removed a sediment shall be disposed of in n appropriate manner and shall not be handled in a manner that will
adversely impact water quality (i.e. stockpiling near a stormwater treatment device or stream, etc.).
A benchmark shall be established in the pretreatment unit. The benchmark will document the original
design depth so that accurate sediment accumulation readings can be taken. The measuring device used to
determine the depth at the benchmark shall be such that it will give an accurate depth reading and not
readily penetrate into accumulated sediments.
When the design depth reads 6.97 ✓ feet in the, pretreatment unit, the sediment shall be
removed from both the pretreatment unit and the infiltration basin
5. If the Divisiondetennines that the system is failing; the system will immediately be repaired to original
design specifications. If the system cannot be repaired to perform its design function, other stonnwater
control devices as allowed by NCAC 2H .1000 musi,be designed. approved and constructed.
I acknowledge and agree by my signature below that I am responsible for the performance of the five
maintenance procedures listed above. 1 agree to notify DWQ of`any problems with the system or prior to any
changes to the system or responsible party.
Print I
Addre
Phone
and Title. RICHARD MILLER - OWNER
902 W. 3RD. STREET - KILL DEVIL HILLS,
252 441-4358
I. -
NOW.' .The lel,ull.v responsible purrr should not he a hwnemrttem association unlras more Chun. 5M: 1' gfthe Ints hart, been soh! u??d u
revidew gfthe s be isision has beet? numed`rh(, president. I
I. . idyl�e mk m . ✓%S a(&ta Public /it),- the State of N�f�h CQ�, �mtn. of
l .0 (L 1 A — . dorhetrrchp emir? that 11tdiQr� t t 1 t I IQ✓ persunnllr- app-ared before me this 1zWA
day of tA'7 .and acknow ledge the due execution of the forgoing infiltration basin maintenance requirements.
jam ......
witness my hand art 15<c{aJ seyC,\
SEAL
Form SWU-
My commission
Page 3 or 3
hiy Commie: o;: t=:pit"-s C-27.2007.