HomeMy WebLinkAboutSW7080214_CURRENT PERMIT_20080228STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW -7
DOC TYPE
CURRENT PERMIT
❑ APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE��
YYYYM M D D
\O�QF W fi rF9PG Michael F. Easley, Grog 0
William G. Ross Jr., Secretary
r� ➢' North Carolina Department of Environment and Natural Resources
l
O C Coleen H. Sullins, Director
Division of Water Quality
February 28, 2008
Burton Farm Development Company, LLC
Attn.: Charles J. Hayes, Jr. — Managing Member
C/o Kitty Hawk Land Company
PO Box 229
Kitty Hawk, NC 27949
Subject: Stormwater Permit No. SW7080214
Burton Farm Village Pool Clubhouse
High Density Project
Pamlico County
Dear Mr. Hayes:
The Washington Regional Office received a complete Stormwater Management Permit
Application for Burton Farm Village Pool Clubhouse on February 14, 2008. 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.
SW7080214 dated February 28, 2008, for the construction of the subject project.
This permit shall be effective from the date of issuance until Feb uary 28, 2018, and shall be
subject to the conditions and limitations as specified therein. Please pay special attention to
the Operation and Maintenance requirements in this permit. Failure to establish an adequate
system for operation and maintenance of the stormwater management system will result in
future compliance problems.
If any parts, requirements, or limitations contained in this permit are unacceptable, you have
the right to request an adjudicatory hearing upon written request within sixty (60) days
following receipt of this permit. This request must be in the form of a written petition,
conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of
Administrative Hearings, P.O. Drawer 27447, Raleigh, NC 27611-7447. Unless such demands
are made this permit shall be final and binding.
If you have any questions, or need additional information concerning this matter, please
contact Samir Dumpor, or me at (252) 946-6481.
e
Sinc rely,
AI odge
Regional Supervisor
Su ace Water Protection Section
AH/sd: , J:\WPDATA\WQS\ State SW-SD\Permits — Wet Pond \SW7080214
cc: Bobby Billingsley, PE, Thomas Engineering, PA
Pamlico County Building Inspections
Washington Regional Office
Central Files
North Carolina Division of Water Quality Internet: rr�ca.nC�culen�n'llitr oreore One
943 Washington Square Mail Phone (252) 946-6481 North Carolina
Washington, NC 27889 Fax (252)946-9215 Naturally
An Equal Opportunity/Affirmative Action Employer -50%Recycled/10% Post Consumer Paper �/{'K6 L "
State Stormwater Management Systems
Permit No. SW7080214
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
Burton Farm Development Company, LLC
Burton Farm Village Pool Clubhouse
Pamlico County
FOR THE
construction, operation and maintenance of a wet detention pond 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 February 28, 2008, and
shall be subject to the following specified conditions and limitations:
I. DESIGN STANDARDS
This permit is effective only with respect to the nature and volume of stormwater
described in the application and other supporting data.
2. This stormwater system has been approved for the management of stormwater
runoff as described on page 3 of this permit, the Project Data Sheet. The
stormwater control has been designed to handle the runoff from 73,770 square
feet of impervious area.
3. The tract will be limited to the amount of built -upon area indicated on page 3 of
this permit, and per approved plans.
4. All stormwater collection and treatment systems must be located in either
dedicated common areas or recorded easements. The final plats for the project
will be recorded showing all such required easements, in accordance with the
approved plans.
5. The runoff from all built -upon area within the permitted drainage area of this
project must be directed into the permitted stormwater control system.
Page 2 of 7
State Stormwater Management Systems
Permit No. SW7080214
6. The following design criteria have been provided in the wet detention pond and
must be maintained at design condition:
a.
Drainage Area, acres:
4.09
b.
Total Impervious Surfaces, ft2:
73,770
C.
Pond Depth, feet:
8.0
d.
TSS removal efficiency:
90%
e.
Permanent Pool Elevation, FMSL:
29.0
f.
Required Permanent Pool Surface Area, ft2:
6,420
g.
Provided Permanent Pool Surface Area, ft2:
7,500
h.
Temporary Storage Elevation, FMSL:
30.50
i.
Required Storage Volume, ft3:
7,276
j.
Provided Storage Volume, ft3:
14,554
k.
Controlling Orifice:
VO pipe @ el. 29.0
I.
Receiving Stream/River Basin:
Mill Creek / Neuse
M.
Stream Index Number:
27-113
n.
Classification of Water Body:
"SC; Sw; NSW"
II. SCHEDULE OF COMPLIANCE
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 at all times provide the operation and maintenance
necessary to assure the permitted stormwater system functions at optimum
efficiency. The approved Operation and Maintenance Plan must be followed in
its entirety and maintenance must occur at the scheduled intervals including, but
not limited to:
a. Semiannual scheduled inspections (every 6 months).
b. Sediment removal.
C. Mowing and revegetation of slopes and the vegetated filter. .
d. Immediate repair of eroded areas.
e. Maintenance of all slopes in accordance with approved plans and
specifications.
f. Debris removal and unclogging of outlet structure, orifice device, flow
spreader, catch basins and piping.
g. Access to the outlet structure must be available at all times.
4. Records of maintenance activities must be kept and made available upon
request to authorized personnel of DWQ. The records will indicate the date,
Page 3 of 7
State Stormwater Management Systems
Permit No. SW7080214
activity, name of person performing the work and what actions were taken
The facilities shall be constructed as shown on the approved plans. 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.
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.
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.
Access to the stormwater facilities shall be maintained via appropriate
easements at all times.
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. Project name change.
C. Transfer of ownership.
d. Redesign or addition to the approved amount of built -upon area or to the
drainage area.
e. Further subdivision, acquisition, lease or sale of all or part of the project
area. The project area is defined as all property owned by the permittee,
for which Sedimentation and Erosion Control Plan approval or a CAMA
Major permit was sought.
f. Filling in, altering, or piping of any vegetative conveyance shown on the
approved plan.
10. The permittee shall submit final site layout and grading plans for any permitted
future areas shown on the approved plans, prior to construction.
11. A copy of the approved plans and specifications shall be maintained on file by
the Permittee at all times.
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. This permit is not transferable except after notice to and approval by the Director.
In the event of a change of ownership, or a name change, the permittee must
Page 4 of 7
State Stormwater Management Systems
Permit No. SW7080214
submit a formal permit transfer request to the Division of Water Quality,
accompanied by a completed name/ownership change form, 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. The permittee is responsible for compliance with all permit
conditions until such time as the Division approves the transfer request.
2. Failure to abide by the conditions and limitations contained in this permit may
subject the Permittee to enforcement action by the Division of Water Quality, in
accordance with North Carolina General Statute 143-215.6A to 143-215.6C.
3. The issuance of this permit does not preclude the Permittee from complying with
any and all statutes, rules, regulations, or ordinances, which may be imposed by
other government agencies (local, state, and federal) having 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. 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 notify the Division any name, ownership or mailing address
changes within 30 days.
10. This permit shall be effective from the date of issuance until February 28, 2008.
Application for permit renewal shall be submitted 180 days prior to the expiration
date of this permit and must be accompanied by the processing fee.
Permit issued this the 28th day of February, 2008.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
for
Coleen H. Sullins, Director
Division of Water Quality
By Authority of the Environmental Management Commission
Stormwater Permit No. SW7080214
Page 5 of 7
State Stormwater Management Systems
Permit No. SW7080214
Burton Farm Village Pool Clubhouse
Stormwater Permit No. SW7080214
Pamlico 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
A 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:
Signature
Registration Number
Date
SEAL
Page 6 of 7
State Stormwater Management Systems
Permit No. SW7080214
Certification Requirements:
1. The drainage area to the system contains approximately the permitted
acreage.
2. The drainage area to the system contains no more than the permitted
amount of built -upon area.
3. All the built -upon area associated with the project is graded such that the
runoff drains to the system.
4. All roof drains are located such that the runoff is directed into the system.
5. The outlet/bypass structure elevations are per the approved plan.
6. The outlet structure is located per the approved plans.
7. Trash rack is provided on the outlet/bypass structure.
8. All slopes are grassed with permanent vegetation.
9. Vegetated slopes are no steeper than 3:1.
10. The inlets are located per the approved plans and do not cause short-
circuiting of the system.
11. The permitted amounts of surface area and/or volume have been
provided.
12. Required drawdown devices are correctly sized per the approved plans.
13. All required design depths are provided.
14. All required parts of the system are provided, such as a vegetated shelf,
and a forebay.
15. The required system dimensions are provided per the approved plans.
cc: NCDENR-DWQ Washington Regional Office
Pamlico County Building Inspections
Page 7 of 7
D W Q USE ONLY
Date Received
Fee Paid
Permit Number
s
State of North Carolina
RECEIVED Department of Environment and Natural Resources
FEB 14 2003 1
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
DWQ-WARD Thus form maybe photocopied foruse as an original
L GENERAL INFORMATION
1. Applicants name (specify the name of the corporation, individual, etc. who owns the project):
$0.2r0.J O'�;4e/y 0EVE4-0A06!-7_ C~,eAW4 44 G
2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
CA144u. r T .!/•i r �s 7P - in rf gGr,rd ••� E.•�aF2
3. Mailing Address for person listed in item 2 above
C. /a /L'i7%y /�,q-wK L�.✓O U..!Pi A14, P O. Qa1c ZZ
city: A- r 7r 'Y ii/h-,K State: .v e zip: 7-7 S' ylS
Phone: { 2 s 2 ) ZZ / y/-7 / Fax: { z f Z ) zG/. 2 a 3,3
Email! L P_,t �wq�•�G�
4. Project Name (subdivision, facility, or establishment name -should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
4 Vow 7-0.✓ �/Ie k f/iLcR GE /��•� CL..ud//Ju.SG
5. Location of Project (street address):
off Or' C7u.C7o„J ff%l2it+ sQrAO
City: Nl�t County: /°*�" L/ G o
6. Directions to project (from nearest major intersection):
i v fEjPlEc f/a.r o'/= Nc -Co 6 Cl e-J GA/lws .Pv)
7704&4�4- &OW&X 2-1-0-0 'r O.✓ 4714ri.r <AiC.N .eoAO. TuOf.✓ Q0,6&.,- ONE 4.0L¢4.
! „ sroydWr v.Q.rEes od
7. Latitude: 3,s 0 e • / 3 rr Longitude: 76 7`f S t✓ of project
rlYE
8. Contact person who can answer questions about the project
Nvne:9441eY 43lLL/.Y6f1,d4y�109�- Telephone Number: (25-7- ) 697 272.7
Email: godeyarLc_ i,✓GfG1;Y( -/1/e,ytA.4.Gent
li. PERMIT INFORMATION:
1. Specify whether project is (check one): [ ew ❑Renewal ❑Modification
Form SWU-101 Version 8.07 Page I of
�oh� T1nr,W.45 =ill 252-S7j- SSSS
/ 4
2. If this application is being submitted as the result of a renewal or modification to an existing pern'dt, list the
existing permit number and its issue date (if known)—.
3. Specify the type of project (check one):
❑Low Density [?-sigh Density ❑Redevelop ❑General Permit ❑Universal SMP ❑Other
4. Additional Project Requirements (check applicable blanks):
❑CAMA Major Sedimentation/Erosion Control 0404/401 Permit ❑NPDES Stormwater
Information on required state permits can be obtained by contacting the Customer Service Center at
1-877-623-6748.
Ill. PROJECT INFORMATION
1. In the space provided below, sununarize how stormwater will be treated. Also attach a detailed narrative
(one to two pages) describing stormwater management for the project.
TRhasEoasE� 114 STa trti DX V,%) 0 0 A 65- ANj> V / fe Ta
ii PkaPasEy wETTE"✓fiA,✓ BQ�i.✓. OLTLE� �a•�o PR�..�
E1✓!P Y aAy rO s.rE TLA--✓Ar
2. Stormwater runoff from this project drains to the Al&-f F River basin.
3. Total Site Area: 0"- a F acres 4. Total Wetlands Area: a �' f acres
5. 100' Wide Strip of Wetland Area: w1A acres (not applicable if no wetlands exist on site)
6. Total Project Area"*: a (acres 7. Project Built Upon Area: l
8. How many drainage areas does the project have?
9. Complete the following information for each drainage area. If there are more than two drainage areas in the
project, attach an additional sheet with the information for each area provided in the same format as below.
Basin Information
Drainage Area 1
Drainage Area 2
Receiving Stream Name
nslLi- C.dEE,C
Stream Class & Index No.
G ' S w ' IJJ-4'
Drainage Area (sf)
17 V. 3 S�
Existing Impervious' Area (sf)
O Sim
Proposed Impervious"Area (sf)
'j,3 -7D .ri
% Impervious" Area (total)
*,, ,
Impervious* Surface Area
Drainage Area 1
Drainage Area 2
On -site Buildings (so
3 3 0 • s' f
On -site Streets (so
$ l y o SF
On -site Parking (so
irGL�p�o
On -site Sidewalks (sf)
S$ 3 G o
Other on -site (sf)
/M aft , 845&,5714,49 L r6b bue
ff6.
Off -site (sf)
I
Total (sf):
7 3 7 7 a
Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas,
sidewalks, gravel areas, etc.
Form SWLI-101 Version 8.07 Page 2 of 4
**Total project area shall be calculated based on the current policy regarding inclusion of wetlands in the built upon area
percentage calculation.
10. How was the off -site impervious area listed above derived? &JI 1"
IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
One of the following deed restrictions and protective covenants are required to be recorded for all subdivisions,
outparcels and future development prior to the sale of any lot. If lot sizes vary significantly, a table listing each
lot number, size and the allowable built -upon area for each lot must be provided as an attaclmu:nt.
Form DRPC-1 High Density Commercial Subdivisions G u M K k� C' 0K �C ✓
Form DRPC-2 High Density Developments with Outparcels J
Form DRPC-3 High Density Residential Subdivisions n 0 tO `t
Form DRPC11 Low Density Commercial Subdivisions
Form DRPC-5 Low Density Residential Subdivisions
Form DRPC-6 Low Density Residential Subdivisions with Curb Outlets
By your signature below, you certify that the recorded deed restrictions and protective covenants for this
project shall include aBlhe applicable items required in the above form, 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 (919) 733-5083 for the status
and availability of these forms.
Form SW401-Low Density
Porm SW401-Curb Outlet System
Form SW401-Off-Site System
Form SW401-Wet Detention Basin
Form SW401-hrfiltration Basin
Form SW401-Infiltration Trench
Form SW401-Bioretention Cet
Form SW401-Level Spreader
Form SW401-Wetland
Form SW401-Grassed Swale
Form SW401Sand Filter
Low Density Supplement
Curb Outlet System Supplement
Off -Site System Supplement
Wet Detention Basin Supplement
Infiltration Basin Supplement
Underground Infiltration Trench Supplement
Bioretention Cell Supplement
Level Spreader/Pilter Strip/Restored Riparian Buffer Supplement
Constructed Wetland Supplement
Grassed Swale Supplement
Sand Filter Supplement
Form SWU-101 Version 8.07 Page 3 of 4
VI. SUBMITTAL REQUIREMENTS
Only complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ).
A complete package includes all of the items listed below. The complete application package should be
submitted to the appropriate DWQ Office. (Appropriate office may be found by locating project on the
interactive online map at httu:/lh2o.enr.state.ne.us/su/msi maps.htm)
1. Please indicate that you have provided the following required information by initialing in the space provided
next to each item.
initials
• Original and one copy of the Stormwater Management Permit Application Form
oet e
• Original and one copy of the Deed Restrictions & Protective Covenants Form
• Original of the applicable Supplement Form(s) and O&M agreement(s) for each BMP
of �6
• Permit application processing fee of $505 ($4,000 for Express) payable to NCDENR
9— 4-0
• Calculations & detailed narrative description of stormwater treatment/management
4 LO
• Copy of any applicable soil report
4e 6
• Three copies of plans and specifications (sealed, signed & dated), including:
c m
- Development/Project name
- Engineer and firm
- Legend
- North arrow
- Scale
- Revision number & date
- Mean high water line
- Dimensioned property/project boundary
- Location map with named streets or NCSR numbers
- Original contours, proposed contours, spot elevations, finished floor elevations
- Details of roads, drainage features, collection systems, and Stornwater control measures
- Wetlands delineated, or a note on plans that none exist
- Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations
- Drainage areas delineated
- Vegetated buffers (where required)
VIl. AGENT AUTHORIZATION
If you wish to designate authority to another individual or firm so that they may provide Information on your
behalf, please complete this section.
Designated agent (individual or firm): 7/i0.»*-r' G NUJ/✓EEiCrw/6 , / �9
Mailing Address: PL e ox- ex , r �.
City: N E4' ,6C-2 ./ State:— C, Zip: 7- $.1-6 3
Phone: (zsZ I 63'7, 27L7 Fax; i ZSZ 1 656. 2-Y-p$
Email: �olf3yL3�[,.,✓GfYFY[?TNay+Bs G.✓EEI:i.✓(�PA.Co^-
VIII.APPLICANT"S CERTIFICATION
I, (print or hype name of person listed in General Information, item 2) C AA.- (Q S ljklJOG
certify that the information included on this permit application form is, to the best of my k owl dge, correct and
that the project will be constructed in conformance with the approved plans, that the required deed restrictions
and protective covenants will be recorded, and that the proposed project complies with the requirements of 15A
NCAC 2H 1(100.
Signature: Date: / 7u
Form SWU-101 Version g.07 Page 4 of
'ice SMED Permit
(to be provided by DWQ)
wr=
NCDENR
FEB L 6
LOJn
®W&WARD
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
WET DETENTION BASIN SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part III) must be printed, filled out and submitted along with all of the required information.
�I. PROJECT INFORMATION
Project name Burton Farm Village Pool Clubhouse
Contact person Bobby Billingsley, PE
Phone number 252,637,2727
Date 2.11.2008
Drainage area number 1
Olqiii�,
II. DESIGN INFORMATION
Site Characteristics
Drainage area
178,344
It'
Impervious area
73,770
fe
%impervious
41.36388104
%
Design rainfall depth
1.0
in
Storage Volume: Non -SR Waters
Minimum volume required
7,276
It,
Volume provided
14,554
ft'
Storage Volume: SR Waters
1-yr, 24-hr runoff depth
in
Pre -development 1-yr, 24-hr runoff
ft3
Post -development 1-yr, 24-hr runoff
ft3
Minimum volume required
ft3
Volume provided
ft3
Peak Flow Calculations
Is prelpost control of the 1-yr 24-hr peak flow required?
Y
(Y or N)
1-yr, 24-hr rainfall depth
3.7
in
Rational C, pre -development
0.2
(unitless)
Rational C, post -development
0.5
(unitless)
Rainfall intensity: 1-yr, 24-hr storm
7.5
in/hr
Pre -development 1-yr, 24-hr peak flow
6.2
ft3/sec
Post -development 1-yr, 24-hr peak flow
15.1
ft'/sec
Pre/POSH-yr, 24-hr peak flow control
8.9
ft3/sec
Basin Elevations
Basin bottom elevation
19.50 ft
Sediment cleanout elevation
21.00 it
Bottom of shelf elevation
28.50 ft
Permanent pool elevation
29.00 It
Top of shelf elevation
29.50 It
Temporary pool elevation
30.50 ft
Volume and Surface Area Calculations
SAIDA ratio
3.60
(unilless)
Surface area at the bottom of shelf
5600.00
flz
Volume at the bottom of shelf
26586.00
ft'
Permanent pool, surface area required
6,420
ft2
Permanent pool, surface area provided
7,500
ft OK
Permanent pool volume
29,861
ft3
Average depth for SAIDA tables
3.981466667
It OK
Surface area at the top of shelf
9600
It,
Volume at the lop of shelf
34136
ft3
Forrn SW401-Wet Detention Basin-Rev.3 Parts I. & II. Design Summary, Page 1 of 2
Permit No.
(to be provided by DWQ)
Forebay volume
5,971
ft'
Forebay % of permanent pool volume
20
%
OK
Temporary pool, surface area provided
10,957
ft2
Drawdown Calculations
Treatment volume drawdown time
3
days
OK
Treatment volume discharge rate
0.02
fills
Pre -development 1-yr, 24-hr discharge
6.15
ft'(s
OK
Post -development 1-yr, 24-hr discharge
0.02
ft31s
OK
Additional Information
Diameter of orifice
1.00
in
Design TSS removal
90
%
t t
Basin side slopes
3
:1
OK
Vegetated shelf slope
to
:1
OK M o�
Vegetated shelf width
10
ft
OK t�
Length of fiowpath to width ratio
3
:1
OK
Length to width ratio
3
:1
OK
Trash rack for overflow & orifice?
N
(Y or N)
Need to provide trash rack or similar device
Freeboard provided
2
ft
OK
Vegetated filter provided?
N
(Y or N)
Design must be based on 90%TSS removal
Recorded drainage easement provided?
Y
(Y or N)
OK
Capures all runoff at ultimate build -out?
Y
(Y or N)
OK
Drain mechanism for maintenance or emergencies
Mach. Pumps
Form SW401-Wet Detention Basin-Rev.3
Parts I. & II. Design Summary, Page 2 of 2
Permit
(to be provided by DWQ)
III; REQUIREDI_TEMS CHECKLIST _- ;', h _a. „�2 ,i..
Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will
result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to
indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a
requirement has not been met, attach justification.
Pagel Plan
Initials Sheet No.
tZ t_dj '3 a 8 1. Plans (1" - 50' or larger) of the entire site showing:
Design at ultimate build -out, RECE P7 ED
Off -site drainage (if applicable), 9
Delineated drainage basins (include Rational C coefficient per basin),
Basin dimensions, FEB 14 2008
Pretreatment system, �) /� D (�
High flow noncebypass
ccessystem, �VVQ-V t{A 0 -Maintenance access, V a
Recorded drainage easement and public right of way (ROVE,
- Overflow device, and
- Boundaries of drainage easement.
2. Partial plan (1" = 30' or larger) and details for the wet detention basin showing:
- Outlet structure with trash rack or similar,
- Maintenance access,
- Permanent pool dimensions,
- Forebay and main pond with hardened emergency spillway,
- Basin cross-section,
- Vegetation specification for planting shelf, and
- Filter strip,
u l- 3. Section view of the dry detention basin (1" = 20' or larger) showing:
- Side slopes, 3:1 or lower,
- Pretreatment and treatment areas, and
- Inlet and outlet structures.
R L 3 ' P o 4. If the basin is used for sediment and erosion control during construction, clean out of the basin is specified
on the plans prior to use as a wet detention basin.
5. A table of elevations, areas, incremental volumes & accumulated volumes for overall pond and for forebay,
to verify volume provided.
L 6. An assurance that the installed system will meet design specifications upon initial operation once the
project is complete and the entire drainage area is stabilized.
L 6 7. A construction sequence that shows how the wet detention basin will be protected from sediment until the
entire drainage area is stabilized.
I? LA 8. The supporting calculations.
9. A copy of the signed and notarized inspection and maintenance (AM) agreement. C°MM. cl. +cr
N 10. A copy of the deed restriction.
Form SW401-Wet Detention Basin-Rev.1 Part III. Required Items Checklist, Page 1 of 1
RECEIVED
Pemtit Number:
FEB 14 2008 (IobeprovidedbyDWQ)
Drainage Area Numbor:
Wet De�ten_ ipi>rBasin Inspection and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will be kept in a
log in a known set location. Any deficient BMP elements noted in the inspection will be
corrected, repaired or replaced immediately. These deficiencies can affect the integrity
of structures, safety of the public, and the removal efficiency of the BMP.
The wet detention basin system is defined as the wet detention basin,
pretreatment including forebays and the vegetated filter if one is provided.
This system (check one):
❑ does ® does not incorporate a vegetated filter at the outlet.
This system (check one):
❑ does ® does not incorporate pretreatment other than a forebay.
important maintenance procedures:
— Immediately after the wet detention basin is established, the plants on the
vegetated shelf and perimeter of the basil 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.
— Tf 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 13 inches if in a
Coastal County). Records of inspection and maintenance should be kept in a known set
location and must be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMP element:
Potentialproblem:
How I will remediate theproblem:
The entire BMP
Trash/debris is present.
Remove the trash/debris.
The perimeter of the wet
Areas of bare soil and/or
Regrade the soil if necessary to
detention basin
erosive gullies have formed.
remove the gully, and then plant a
ground cover and water until it is
established. Provide lime and a
one -Lime fertilizRr application -
Vegetation is too short or too
Maintain vegetation at a height of
long.
I approximately six inches.
Form SW401-Wet Detention Basin I&M-Rev.2
Permit Number:
(to be provided by DWQ)
Drainage Area Number:
Form SW401-Wet Detention Basin I&M-Rev.2
Pernik Number:
(to be provided by DWQ)
Drainage Area Number.
BMP element:
Potentialproblem:
How I will remediate theproblem:
The inlet device: pipe or
The pipe is dogged.
Unclog the pipe. Dispose of the
swale
sediment off -site.
The pipe is cracked or
Replace the pipe.
otherwise damaged.
Erosion is occurring in the
Regrade the swate if necessary to
swale.
smooth it over and provide erosion
control devices such as reinforced
turf matting or riprap to avoid
future problems with erosion.
The forebay
Sediment has accumulated to
Search for the source of the
a depth greater than the
sediment and remedy the problem if
original design depth for
possible. Remove the sediment and
sediment storage.
dispose of it in a location where it
will not cause impacts to streams or
the BMP.
Erosion has occurred.
Provide additional erosion
protection such as reinforced turf
matting or riprap if needed to
prevent future erosion problems.
Weeds are present.
Remove the weeds, preferably by
hand. If pesticide is used, wipe it on
the plants rather than Traying.
The vegetated shelf
Best professional practices
Prune according to best professional
show that pruning is needed
practices
to maintain optimal plant
health.
Plants are dead, diseased or
Determine the source of the
dying.
problem: soils, hydrology, disease,
etc. Remedy the problem and
replace plants. Provide a one -tine
fertilizer application to establish the
ground cover if a soil test indicates
it is necessary.
Weeds are present
Remove the weeds, preferably by
hand. If pesticide is used, wipe it on
the plants rather than spraying.
The main treatment area
Sediment has accumulated to
Search for the source of the
a depth greater than the
sediment and remedy the problem if
original design sediment
possible. Remove the sediment and
storage depth.
dispose of it in a location where it
will not cause impacts to streams or
the BMP.
Algal growth covers over
Consult a professional to remove
50% of the area.
and control the Aga] growth,
Cattails, phragmites or other
Remove the plants by wiping them
invasive plants cover 50% of
with pesticide (do not spray).
the basin surface.
Form SW401-Wet Detention Basin I&M-Rev.2
Permit Number:
(to be provided by DWQ)
Drainage Area Number:
BMP element:
Potentialproblem:
How I will remediate theproblem:
The embankment
Shrubs have started to grow
Remove shrubs immediately.
on the embankment.
Evidence of muskrat or
Use traps to remove muskrats and
beaver activity is present.
consult a professional to remove
beavers.
A tree has started to grow on
Consult a dam safety specialist to
the embankment.
remove the tree.
An annual inspection by an
Make all needed repairs.
appropriate professional
shows that the embankment
needs repair.
The outlet device
Clogging has occurred.
Clean out the outlet device. Dispose
of the sediment off -site.
The outlet device is damaged
Repair or replace the outlet device.
The receiving water
Erosion or other signs of
Contact the local NC Division of
damage have occurred at the
Water Quality Regional Office, or
outlet.
the 401 Oversight Unit at 919-733-
1786.
The measuring device used to determine the sediment elevation shall be such
that it will give an accurate depth reading and not readily penetrate into
accumulated sediments.
When the permanent pool depth reads 8
sediment shall be removed.
When the permanent pool depth reads 8
shall be removed.
Sediment Removal
Bottom
feet in the main pond, the
feet in the forebay, the sediment
BASIN DIAGRAM
ill in the blanks)
0 Permanent Pool Elevation 2
Z 1 Pe manen Pool
Volume Sediment Removal Elevation 2 Volume
-ft Min. ----------------------------- ----------- ------
Sediment Bottom Elevation 1-ft c
Storage Sedimei
Storage
FOREBAY MAIN POND
Form SW401-Wet Detention Basin I&M-Rev.2
permit
(to be provided by D R'Q)
I acknowledge and agree by my signature below that I am responsible for the
performance of the maintenance procedures Listed above. I agree to notify DWQ of any
problems with the system or prior to any changes to the system or responsible party.
Projectname: ,do.eYvn/ FLizWW 11,&Z-46E f24,0c- CLc.6flo�./d
RMP drainage area number:
Printname: Clolwxeer J . fiAyES, Ta.
Title: -,SV 447vy C- ei O Fy� GPM Ef Cb�•e/AvyLG C
Address: �Zn �, Tl Y h 4-o%t L4A1,P C,~,OA-,y , l5ax- Z Z f
Note: The legally responsible party should not be a homeowners association unless more than 50% of
the lots have been sold and a resident of the subdivision has been named the president.
1, W& lu(' 65 , a Notary Public for the State of
�)KA�\ CQft)�.'k C1. County of Cu,c( \tUC Y= do hereby certify that
(10 (�S �tQlle S c iC_ personally appeared before me thus
day of , ZM�- , and acknowledge the due execution of the
forgoing wet detention basin maintenance requirements. Witness my hand and official
seal,
LINDA BURRIS
NOTARY PUBLIC
K COUNTY
STrCE OFITUNORTH CAROLINA
SF.,AI.,
My commission expires 5-2 1-1 2.
Form SW401-Wet Detention Basin I&M-Rev.2
IMIU03 P.001Mm„
x 11OFAa HTFlL:'.
REURVED
N/�
FEB 2 6 2008 permit Number:
(to be provided by DWp)
®11/14/i'tt_W R (0 Draviage Area Number:
Filter Strip, Restored"�Ri�Jplaria/nnlBl fo afer and Level Spreader
Inspection and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will be kept in a
log in a known set location. Any deficient BMP elements noted in the inspection will be
corrected, repaired or replaced immediately. These deficiencies can affect the integrity
of structures, safety of the public, and the removal efficiency of the BMP.
Important maintenance procedures:
— Immediately after the filter strip is established, any newly planted vegetation
will be watered twice weekly if needed until the plants become established
(commonly six weeks).
Once a year, the filter strip will be reseeded to maintain a dense growth of
vegetation
Stable groundcover will be maintained in the drainage area to reduce the
sediment load to the vegetation.
Two to three times a year, grass filter strips will be mowed and the clippings
harvested to promote the growth of thick vegetation with optimum pollutant
removal efficiency. Turf grass should not be cut shorter than 3 to 5 inches and
may be allowed to grow as tall as 12 inches depending on aesthetic requirements
(NIPC,1993). Forested filter strips do not require this type of maintenance.
Once a year, the soil will be aerated if necessary.
— Once a year, soil pH will be tested and lime will be added if necessary.
After the filter strip is established, it will be inspected quarterly and within 24 hours
after every storm event greater than 1.0 inch (or 1.5 inches if in a Coastal County).
Records of inspection and maintenance will be kept in a known set location and will be
available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMP element.
Potentialproblem:
How I will remediate the roblem:
The entire filter strip
'Trash/debris is present.
Remove the trash/debris.
system
The flow sputter device
(if applicable)
The flow splitter de '
nd dis se
of any sediment off -site.
The flow sputter device is
Make any necessary repairs or
damaged,
replace if damage is too large for
re air.
Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer 1&M-Rev.2 Page 1 of 3
.sr..�+.� .......�.r.�«.....�..........
BMP element:
Potentialproblem:
How I will remediate theproblem:
The swale and the level
The swale is clogged with
Remove the sediment and dispose
lip
sediment.
of it off -site.
The level lip is cracked,
Repair or replace lip.
settled, undercut, eroded or
otherwise damaged.
There is erosion around the
Regrade the soil to create a berm
end of the level spreader that
that is higher than the level lip, and
shows stormwater has
then plant a ground cover and
bypassed it.
water until it is established. Provide
lime and a one-time fertilizer
application.
Trees or shrubs have begun
Remove them.
to grow on the swale or just
downslo a of the level lip.
The bypass channel
Areas of bare soil and/or
Regrade the soil if necessary to
reestablish proper erosion control.
Turf reinforcement is
Study the site to see if a larger
or npap is ro g
ypass c ri
downhill.
necessary). After this, reestablish
the erosion control material.
The filter strip
Grass is too short or too long
Maintain grass at a height of
if applicable)-
approximately three to six inches.
Areas of bare soil and/or
Regrade the soil if necessary to
erosive gullies have formed.
remove the gully, and then plant a
ground cover and water until it is
established. Provide lime and a
one-time fertilizer application.
Sediment is building up on
Remove the sediment and
the filter strip.
restabilize the soil with vegetation if
necessary. Provide lime and a one-
time fertilizer application.
Plants are desiccated.
Provide additional irrigation and
fertilizer as needed.
Plants are dead, diseased or
Determine the source of the
dying.
problem: soils, hydrology, disease,
etc. Remedy the problem and
replace plants. Provide a one-time
fertilizer application.
Nuisance vegetation is
Remove vegetation by hand if
choking out desirable species.
possible. If pesticide is used, do not
allow it to get into the receiving
water.
The receiving water
Erosion or other signs of
Contact the NC Division of Water
damage have occurred at the
Quality local Regional Office, or the
outlet
1 401 Oversight Unit at 919-733-1786.
Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer I&M-Rev.2 Page 2 of 3
r
t
permit Number:
(to be provided by DWQ)
I acknowledge and agree by my signature below that I am responsible for the
performance of the maintenance procedures listed above. I agree to notify DWQ of any
problems with the system or prior to any changes to the system or responsible party.
Project name: Fjuoe To.o A;Ooeen W/ic-LfF6%s Poo[- GLo dWPLi rtC
BMP drainage area number:,
Print name: C//gtLEs T. 114Yafr, YTee
Title: MAw46 e.✓6 At e. ?.dErf — gc/.Gron/ F/4,e W7 Oet dr4 ..,F- r C-,4r l4wl
Address: KinY /yA&.t L ANo Co,,.Y /f,� Q"X zz S [-c. e
Note: The legally responsible party should not be a homeowners association unless more than 50% of
the lots have been sold and u resident of the subdivision has been named the president.
1> P&a BU, 6.5 , a Notary Public for the State of
County of Cllu(( \tUCK , do hereby certify that
J- a OQ�KS J'( personally appeared before me this 3-0
day of ka wst 2jX8 , and acknowledge the due execution of the
forgoing filter strip, riparian buffer, and/or level spreader maintenance requirements
Witness my hand and official seal,
LINDA BURRIS E
NOTARY PUBLIC jE
CURRITUCK COUNTY
STATE OF NORTH CAROUNA
SEAL
My commission expires 5" ZY 12-
Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer l&M-Rev.2 Page 3 of 3
o:.rau�a Ya;�ro�r
' STORMWATER SUBMITTAL REQUIREMENTS
WET DETENTION POND
Objective
A. Collect all runoff from all BUA (proposed and/or existing and/or offsite) as the case may be,
by any means including piping or swales, and direct it to the pond.
B. Check the proposed pond design to make sure it meets or exceeds the minimum design
criteria for surface area, volume and drawdown.
II. What makes up a complete wet detention pond application package?
A. /wo sets of sealed, signed & dated layout & grading plans with appropriate details.
/(Additional sets of plans may be requested for protects in certain counties)
B. V Completed application with supplement(s), SWU-.101, SW401-Wet Pond, and inspection and
aintenance agreements.
C. N% Deed restriction document, if applicable (for subdivisions & projects with out parcels)
D. V healed, signed & dated calculations.
table elevation at all pond locations.
�{ E. Estimated seasonal high water
F. NlA Chlorides test results must be provided if the project is within Yz mile of SR waters (Phase 11).
(This is only required to test out of SR water treatment requirements)
III. BIMS entry (for DWQ use only)
Enter & track application acknowledged date, review date, add info requested/received dates, permit
issue dates, and drainage area info. Best done after the add info letter is written and before sending
permit up for signature.
IV. Shell documents (for DWQ use only)
Permit shells: s:\wqs\stormwater\shells\highcompond
s:\wqs\stormwater\shells\highsubpond
s:\wqs\stormwater\shells\HDhybrid
Spreadsheet: s:\wqs\stormwater\excel spreadsheets\pond
VI. Review Procedure
A. APPLICATION
1. ✓P n original signature is required. Photocopied signatures cannot be accepted.
2. ✓ A completed wet detention pond supplement and a signed, dated and notarized wet
detention pond Inspection and Maintenance Agreement with an original signature.
3. —The numbers on the supplement match up to the numbers used in the calculations and
shown on the plan details.
4. Built -upon areas are reported in square feet in Section 111.6.
ij 5. V Receiving stream name and classification. This is important because in the non -Phase
11 counties, a wet pond cannot be used on a project that is within'/2 mile of and draining
to SA waters. For Phase 11, a wet pond is allowed within '/2 mile of SA waters.
6. ✓Section 111.6 is filled in -cannot be left blank. One column must be filled in for each
proposed wet pond.
Q 7. If the applicant is a corporation, partnership or LLC, look it up on the Secretary of State
Corporations Database. Make sure corporation is spelled correctly (capitalization and
punctuation matter). and that the person signing the application is at least a vice-
president in the corporation, a General Partner in the partnership, a member in a
member -managed LLC, or the manager of a manager -managed LLC. Need
documentation to support if the Articles of Incorporation do not list the members or
managers of the LLC. If an agent signs, then a letter of authorization is needed from the
Ii/Apresident, vice president, general partner, member or manager.
8.1r, For subdivided projects, a signed and notarized deed restriction statement must be
provided.
Wet Detention Pond, cont.
1
B. CALCULATIONS
1. /he orifice is sized based on drawing down the calculated minimum volume in 2-5
days. The average head to use in the orifice equation is approximately one-third of
the distance between the permanent pool elevation (PPE) and the elevation of the
next available outlet above the permanent pool. The elevation of the next available
outlet must be either the elevation where the minimum volume is provided, or it can
be higher. The temporary pool elevation (TPE) to report on the supplement will be
the elevation of the next available outlet above the PPE. The temporary pool volume
(TPV) to report on the supplement is the volume between the specified PPE and the
TPE.
2.WAr or Phase II projects that are within Y mile of and draining to SR waters, the
difference in runoff from the predevelopment and post -development conditions for
3i /the 1 year 24 hour storm must be controlled and treated.
PFor Phase II projects, the discharge rate leaving the pond can be no more than the
pre -development discharge rate for the 1 year 24 hour storm.
4,WFFor Phase II projects draining to SA water, no discharge to surface waters may occur
/
from wet ponds. The discharge leaving the orifice must be effectively infiltrated prior to
reaching surface waters.
5. The average pond depth is the permanent pool volume divided by the permanent pool
surface area. The result must be between 3 ft. and 7.5 ft. Parts of the pond can be
6 deeper than 7.5 ft., but in no case can any part of the pond be less than 3 ft deep.
�Ifthe 85 /o TSS chart is used a 30' vegetated filter must be provided at the outlet of the
Pond. If the 90% TSS chart is used, no filter is required.
7. Use the cor7Uct-SAJDA TSS chart from the BMP Manual noting that there are different
8. 1�charts for different areas of the State.
Required surface area at permanent pool.
1 /Provided surface area at permanent pool (Based on pond dimensions)
0. V Required volume calculation based on 1.5" storm for Phase 11 projects* and 1" storm for
all others projects. *unless the project is Phase II and within % mile of and draining to
SR waters then the volume calculation must be based on difference between the pre
and post development conditions for the 1-yr 24-hr storm.
? 11. Table of elevations, areas, incremental volumes and accumulated volumes for overall
pond and for forebay, to verify volumes provided.
12'VForebay designed to hold 20% of the permanent pool volume. (Range of 18%-22%
OK.)
13-erosive flow, for 10 yr. storm in the vegetated filter, if using 85% TSS.
14.y Toe seasonal high water table must be at or below the proposed permanent pool
elevation to assure that the necessary volume will be available above the permanent
pool.
15 Rounding numbers off during the calculation process can result ip deficiencies. Do not
round the numbers until you get to the final result.
16. VAn additional one foot must be excavated below the bottom elevation of the pond. The 1
foot sediment accumulation depth is not included in the average depth calculation.
Wet Detention Pond, cont.
C. PLANS- Due to storage space constraints, plan sheets should be kept to a minimum. For
small commercial single wet pond projects, the plan set could consist of only 2 or 3 sheets,
layout; grading and details. For larger projects, show as much information as possible on as
few sheets as possible, without cluttering them up.
1. � Development/Project Name
2. Engineer name and firm.
3.✓ Legend
4. ,North Arrow
5. Location Map with nearest intersection of two major roads shown. Major road is any 1,
/2, or 3 digit NC, US or interstate highway.
6. J Scale- standard engineering scale, no off-the-wall stuff.
7. VIDate
8. ✓Revision number and date, if applicable.
9. Original contours, proposed contours, spot elevations, finished floor elevations, pipe
inverts, swale inverts, etc.
10.VExisting drainage (piping, swales, ditches, ponds, etc.), including off -site. Include a map
delineating the offsite drainage areas.
11V/Property/Project boundary lines, bearing & distances.
13�Q Mean High Water Line or Normal High Water Line, if applicable.
1he lowest
elevation of adjacent wetlands. Evaluate the need for a liner and/or berm/slurry wall to
prevent dewatering the wetland.
,� 14. Drainage easement widths, pipe sizes and swale inverts are provided.
15. Wetlands delineated, or a note on the plans that none exist. Get a copy of the wetlands
delineation map signed by the Corps of Engineers, or have the applicant include a copy
of the unsigned delineation map submitted to the Corps. Wet ponds may not be located
in wetlands unless a permit to fill those wetlands has been obtained.
16�Details for the roads, parking, cul-de-sacs, including sidewalk width, radii, dimensions &
slopes.
1-A Apartment / Condo development- Provide a typical building footprint with dimensions
18✓and note all concrete and wood deck areas.
The drainage area for each wet pond is clearly delineated and numbered to match up to
the calculations and supplement. Drainage area delineation is best done as a separate
/plan sheet.
19. A pond section detail to include the forebay, a 10 foot wide vegetated shelf, pertinent
elevations for the bottom, permanent pool, temporary pool, and SHWT, 3:1 slopes
above the permanent pool, and the weir elevation between the main pond and the
/forebay.
20. V The 10 vegetated shelf extends 6" below and 6" above the permanent pool elevation.
21:vAn outlet structure detail showing a trash rack with 56" square openings, the necessary
orifice invert elevation (i.e., the permanent pool), orifice size and temporary pool
✓elevation.
22. Dimensions for each line and arc formed by the permanent pool contour.
23n%�/!Where the 85% TSS chart was used, a 30 ft. vegetated filter strip is required to be
shown on the plans & detailed (elevations, inverts, slopes, and flow spreader
mechanism). Please note that the filter strip is not a ditch.
24.✓A,forebay is provided for each inlet and located so as to prevent short-circuiting.
25.Vthe pond must have a minimum 1.5:1 length to width ratio and a minimum 3:1 flow path
length. Artificial "baffles" of timber, vinyl, or earth can be used to create a longer flow
path. The top elevation of the baffle should be set at the temporary pool elevation or
26. A Vegetation plan is specified for the pond, including slopes. Wetlands species are
listed for planting on the 10:1 shelf. Weeping Love Grass is not suitable as a permanent
/vegetated cover for pond slopes.
27. All roof drainage must be directed to the pond. Show the roof drain collection lines on
the plan. This is necessary for projects where the buildings back up the property lines
where roof drainage may leave the site prior to going through the pond.
THOMAS ENGINEERING, PA
To: NCDENR
Division of Water Quality
943 Washington Square mall
Washington, NC 27889
Re: Burton Farm Village Pool Clubhouse
State Stormwater Permit No. SW7080214
Pamlico County, NC
Dear Sirs,
September 22, 2009
RECEIVED
SEP 2 4 2009
DWQ-WARD
Please find eyelosed for your files the Engineer's Certification for the referenced project.
If you hoe any questions or comments, please do not hesitate to call.
Enclosures
I-01
309 MetcalfStreet.P.0. Box /309.New Bern, NC 28563
Phone: (252)637-2727.Fa : (252)636-2448.Website: Thomas EngineeringPA.com
Burton Farm Village Pool Clubhouse
Stonnwater Permit No. SW7080214
Pamlico County
Designer's Certification
State Stormwater Management Systems
Permit No. SW7080214
SEP 2 4 2009
DViir)-WARM
I, G,n��D • waif S , as a duly registered ,Vess` 'u¢Q� in the
State of North Carolina, having been authorized to obsery (periodically/' ekly/ full
time) the construction of the project,
(Project)
for s r`�w� �.� ;�, b0�nti �.,u-c4project Owner) he state that, to the
best of my abilities, due care drid diligen6e 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
Page 6 of 7
State Stormwater Management Systems
Permit No. SW7080214
Certification Requirements:
�. 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.
44 All roof drains are located such that the runoff is directed into the system.
r/ 5. The outlet/bypass structure elevations are per the approved plan.
fib• The outlet structure is located per the approved plans.
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.
122.. Required drawdown devices are correctly sized per the approved plans.
----113. 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 Washington Regional Office
Pamlico County Building Inspections
Page 7 of 7