SW1080102_CURRENT PERMIT_20080325

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW
DOC TYPE
InP CURRENT PERMIT
APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
YYYYMMDD

o�oF WA7F9 O • Michael F Easley, Governor
8 F I L E COPY William G. Ross Jr., Secretary
Y North Carolina Department of Environment and Natural Resources
O Y Coleen H. Sullins, Director
Division of Water Quality
March 25, 2008
United Community Bank — Cashiers North Carolina
C/O Mr. Greg Hining
PO Box 979
Brevard, NC 28712
Subject: Stormwater Permit No. SW1080102
United Community Bank — Cashiers, NC
High Density Project
Jackson County
Dear Mr. Hining:
The Asheville Regional Office received a complete Stormwater Management Permit Application for
C;raridfatherCen�� on March 12, 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. SW1080102 dated March 25, 2008, for the
construction of the subject project.
This permit shall be effective from the date of issuance until March 25, 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 Starr Silvis,
or me at [phone].
Sincerely,
Roger C. Edwards
Regional Supervisor
Surface Water Protection Section
cc: Mr. Mark Ambtman, Civil Development Solutions, 224 f South Grove Street, Hendersonville,
NC 28792
Mr. Robert Shelton, Jackson County Building Inspections
Asheville Regional Office
Central Files - __
NthCarolina
Noaturally
North Carolina Division of Water Quality 2090 U.S. Highway 70 Swannanoa, NC 28778 Phone [phone] Customer Service
Internet: www..noNaterquality.org FAX [phone]
An Equal OppodunitylAffrmative Action Employer — 50 % Recycled110 % Post Consumer Paper
G:IWPDATAIDEMWO\Jackson\State Slormwater Management\United Community Bank\SW1080102 permit cover letterdoc

State StormwatqI&Vanagement Systems
rmitNo. SW1080102
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
United Community Bank — Cashiers NC
Jackson 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 March 25, 2018, 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
control has been designed to handle the runoff from 30,658 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. The built -upon area for the future
development is limited to 30,658 square feet.
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 1 of 6

State Storm *Permit
Management Systems
* Permit No. SW1080102
6. The following design criteria have been provided in the wet detention pond and
must be maintained at design condition:
a. Drainage Area, acres: 1.53
Onsite, ft : 66,647
Offsite, ftZ: 0
b. Total Impervious Surfaces, ftZ: 30,658
C. Design Storm, inches: 1
d. Pond Depth, feet: 5
e. TSS removal efficiency: 85%
f. Permanent Pool Elevation: 99.30
g. Permanent Pool Surface Area, ftZ: 1,397
h. Permitted Storage Volume, ft3: 2,868
i. Temporary Storage Elevation: 100.30
j. Controlling Orifice: 1"0 pipe
k. Permitted Forebay Volume, ft3: 830
,
I. Receiving Stream/River Basin: Trib to Chattooga
River/Savannah River Basin
M. Stream Index Number: 03-13-01
n. Classification of Water Body: "ORW"
If. 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 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.
Page 2 of 6

• State Stormwat�anagement Systems
rmit No. SW1080102
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. 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.
6. 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.
7. 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.
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. 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.
11. The permittee shall submit final site layout and grading plans for any permitted
future areas shown on the approved plans, prior to construction.
12. A copy of the approved plans and specifications shall be maintained on file by
the Permittee for a minimum of ten years from the date of the completion of
construction.
Page 3 of 6

State Storm w r Management Systems
ifPermit No. SW1080102
13. 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
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
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.
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 constructiorn 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 • r
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.
The permittee shall notify the Division any name, ownership or mailing address
changes within 30 days.
Permit issued this the 25 day of March 2008.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
(49 teen H. Sullins, P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission
Page 4 of 6

State Stormwate anagement Systems
Wrmit No. SW1080102
United Community Bank —Cashiers, NC
Stormwater Permit No. SW 1080102
Jackson 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:
Signature
Registration Number
Date
SEAL
Page 5 of 6

0
State Stormver Management Systems
!* Permit No. SW1080102
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 Asheville Regional Office
Mr. Robert Shelton, Jackson County Building Inspections
Page 6 of 6

HigTi Density Developments with Outpercels
Deed Restrictions & Protective Covenances
• In accordance with Title 15 NCAC 2H.1000, the Stormwater Management Regulations, deed
restrictions and protective covenants are required for High Density Developments with Outparcels
where outparcel lots will be subdivided from the main tract and sold. Deed restrictions and protective
covenants are necessary to ensure that the development maintains a "built -upon" area consistent with
the design criten used to size the stormwater control facility.
I, _ Gl�q J ht n _,acknowledge, affirm and agree by my signature below, that I will
cause the owing deed ibstrictions and covenants to be recorded prior to the sale of any outparcel or
future development area:
•
•
1. The following covenants are intended to ensure ongoing compliance with State Stormwater
Management Permit Number as issued by the Division of Water Quality
under NCAC 2H.1000.
2. The State of North Carolina is made a beneficiary of these covenants to the extent necessary to
maintain compliance with the stormwater management permit.
3. These covenants are to run with the land and be binding on all persons and parties claiming
under them.
4. The covenants pertaining to stormwater may not be altered or rescinded without the express
written consent of the State of North Carolina, Division of Water Quality.
5. Alteration of the drainage as shown on the approved plan may not take place without the
concurrence of the Division of Water Quality.
6. The maximum built -upon area for the outparcel(s) shown on the approved plans is as follows:
Outparcel # BUA Outparcel # BUA
—11 0
These allotted amounts include any built -upon area constructed within the property boundaries,
and that portion of the right-of-way between the lot lines and the edge of the pavement. Built
upon area includes, but is not limited to, structures, asphalt, concrete, gravel, brick, stone, slate,
coquina and parking areas, but does not include raised, open wood decking, or the water
surface of swimming pools.
7. The runoff from all built -upon area within the outparcel or future development area must be
directed into the permitted stormwater control system.
8. Built -upon area in excess of the permitted amount will require a permit modification.
9. The connection from the outparcel's collection system into the stormwater control shall be made
such that short-circuiting of the system does not occur.
10. For those outparcels or future development areas whose ownership is not retained by the
permittee, the new owner shall submit a separate offsite stormwater permit application to the
Division of er Qua:Zt�d, eceive a permit prior to construction.
Signature*
a Notary Public in the
State of IJJ2 ( / / 11/7Z , , County of
do hereby certify that 115 na ! ilro'1(1 personally appeared
before me this the -//) day of J/D( V/1 20 UJ , and acknowledge
the due execution of the foregoing instrument. Witness my hand and
`S ature _
My Commission expires .D)I , l
Form DRPC-2 Rev.1 Page I of I
%Cdt9
,�gAl1A CO J�••••,

II tlJYr 0 I I r W..
Zit! �f IV1% 89 State of North Carolina 01
�— -- - -
I(yts , 1/ I S' D s Department of Environment and Natural Resources jObO 10
Division of Water Quality, - a
STORMWATER MANAGEMENT PERMIT APP57CTION'j�EORIIM
T his form may be photocopied for use as�an b gii,ah h L 0 n
I I u
1. GENERAL INFORMATION JAN 1 5 2008
1. Applicants name (specify the name of the corporation, individual, etc. whotA
the pproject): — J
VVA-fEr QUALITY SECTION
United Community Bank - Cashiers, North Carolina t i.SHEVILLE REGIONAI OFF c
2. Print Owner/Signing Official's name and title (person legally responsible,for facility and compiiance)'­
3. Mailing Address for person listed in item 2 above:
City:Brevard State:NC Zip:28712
Phone: ( ) Fax: ( )
EmaiLRreg hining(abucbi.com
4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
United Community Bank
5. Location of Project (street address):
City:Cashiers County:Jackson
6. Directions to project (from nearest major intersection):
Take US Hwy 64 West to Cashiers. At intersection of NC 107 turn left. Burns Street is located on the Right. Project is
accessed from Bums Street and from NC 107.
7. Latitude:35.058 N Longitude:83.109 W of project
8. Contact person who can answer questions about the project:
Name:Jercmv Cadeau, P.E. Telephone Number: (828 ) 891-9632
Entail: i. cadeau(&.mchsi.com
11. PERMIT INFORMATION:
1. Specify whether project is (check one):
®New []Renewal ❑Modification
Form SWU-101 Version 8.07 Pagel of4

1. Specify whether project is (c'ISeck one): ®New ❑Renewalp ❑Modification
2. If this application is being submitted as the result of a renewal or modification to an existing permit, list the
existing permit
3. Specify the type of project (check one):
❑Low Density ®High Density ❑Redevelop
and its issue date (if
❑General Permit ❑Universal SMP []Other
4. Additional Project Requirements (check applicable blanks):
❑LAMA Major ®Sedimentation/Erosion Control ❑404/401 Permit ❑NPDES Stormwater
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.
All site stormwater runoff will be treated with a wet pond. Flow will be routed to (2) separate forebays for
primary sediment treatment prior to flowing into the wet pond area for TSS removal and other pollutant removal.
After routing through the wet pond the stormwater will be discharge to a vegetated filter prior to leaving the site.
Please see attached narrative for more details.
2. Stormwater runoff from this project drains to the Savannah River basin.
3. Total Site Area:1.53 acres 4. Total Wetlands Area: 0 acres
5. 100' Wide Strip of Wetland Area: N/A acres (not applicable if no wetlands exist on site)
6. Total Project Area**:1.53 acres 7. Project Built Upon Area:46 %
8. How many drainage areas does the project have?i
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
Trio. to Chattooga River
Stream Class & Index No.
ORW
Drainage Area (so
66,647
Existing Impervious* Area (so
0
Proposed Impervious*Area (so
30,658
% Impervious* Area (total)
46
Impervious* Surface Area
Drainage Area 1
Drainage Area 2
On -site Buildings (so
4,879
On -site Streets (so
8,593
On -site Parking (so
8,593
On -site Sidewalks (so
8,593
Other on -site (so
0
Form SWU-101 Version 8.07 Page 2 of

* Impervious area is defined he built upon area including, but not limited too buildings, roads, parking areas,
_ sidewalks, gravel areas, etc.
**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?Auto Cad area calculations for all specific land uses. Offsite
impervious surfaces are diverted to existing ditchlines that route flow around property. All rainfall on -site is captured
IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
One of the following deed restrictions and protective covenants are required to be recorded for all subdivisions, outparecls
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 attachment.
Form DRPC-1
High Density Commercial Subdivisions
Form DRPC-2
High Density Developments with Outparcels
Form DRPC-3
High Density Residential Subdivisions
Form DRPC-4
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 all the 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 [phone] for the status and
availability of these forms.
Form SW401-Low Density
Form SW401-Curb Outlet System
Form SW401-Off-Site System
Form SW401-Wet Detention Basin
Form SW401-infiltration Basin
Form SW401-Infiltration Trench
Form SW401-Bioretention Cell
Form SW401-Level Spreader
Form SW401-Welland
Form SW401-Grassed Swale
Form SW401-Sand Filter
Low Density Supplement
Curb Outlet System Supplement
Oft -Site System Supplement
Wet Detention Basin Supplement
Infiltration Basin Supplement
Underground Infiltration Trench Supplement
Bioretention Cell Supplement
Level Spreader/Filter Strip/Restored Riparian Buffer Supplement
Constructed Wetland Supplement
Grassed Swale Supplement
Sand Filter Supplement
Form SWU-I01 Version 8.07 Page 3 of 4

VI. SUBMITTAL REQUIRMENTS 0
Only complete application packages will he 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
lttip://h2o.enr.state.nc.usisu/msi maos.htm)
1. Please indicate that you have provided the following required information by initialing in the space provided next to
cash item.
• Original and one copy of the Stormwater Management Permit Application Form
• 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
• Permit application processing fee of $505 ($4,000 for Express) payable to NCDENR
• Calculations & detailed narrative description of stormwater treatment/management
• Copy of any applicable soil report
• Three copies of plans and specifications (sealed, signed & dated), including:
- 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 stormwater control measures
- Wetlands delineated, or a note on plans that none exist
- Existing drainage (including off -site), drainage easements, pipe sires, runoff calculations
- Drainage areas delineated
- Vegetated buffers (where required)
VII. 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):Civil Development Solutions - Mark Ambtman
Mailing Address224 f South Grove Street
City: Hendersonville Slate:NC Zip:28792
Phone: (828 ) 696-9992 Fax: (828 ) 696-9954
Email: mark a.cdsdesi eneroup.com
VIII.APPLICANT'S CERTIFICATION
I, (print or type name ofperson listed in General Information, item 2) Mr. Greg IlininQ _
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 wi a recorded, and at *e proposed project complies with the requirements of 15A NCAC/2H .1000.
Signature: y1 js� Date:
Form SWU-101 Version 8.07 Page 4 of 4

Permit No.
(to be provided by DWQ)
III: REQUIRED ITEMS CHECKLIST; • ,.'
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. f(OKIIALITY
Pagel Plan DInitials SheetNo. 81. Plans (1" - 50'or larger) of the entire site showing:- Design at ultimate build -out,- OfF-Site drainage (rf apphCable), +PA4A' ER SECTION
7 LLE REGIONAL OFFICE
- Delineated drainage basins (include Rational C coefficient perbasini,---.____
- Basin dimensions,
- Pretreatment system,
- High flow bypass system,
- Maintenance access,
- Recorded drainage easement and public right of way (ROW),
- Overflow device, and
- Boundaries of drainage easement.
L C 2 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.
SL ' C Z 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.
5C— CZ 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.
-� C Z 5. A table of elevations, areas, incremental volumes & accumulated volumes for overall pond and for forebay,
to verify volume provided.
S c GI S Z 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.
S' CZ 7. A construction sequence that shows how the wet detention basin will be protected from sediment unfit the
entire drainage area is stabilized.
J ( T[�'ia0 8. The supporting calculations.
S /VT1AUlle0 9. A copy of the signed and notarized inspection and maintenance (I&M) agreement.
T� TF/'<4iz•0 10. A copy of the deed restriction.
D
MAR 12 2008
.1
Forth SW401-Wet Detention Basin-Rev.1 Part III! Required Items Checklist, -Page 1-of
WA EH QUALI I Y S-, Il V
ASHEVILLE REGIONAL OFFICE

r, ! E09
;, n03

• • Permit No.
(to be pmvitletl by DWQ)
®WA ,F W A TFgO
O G
h
NCDENR
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 Ill) must be printed, filled out and submitted along with all of the required information.
I..PROJECTINFORMATION
Project name
United Community Bank - Cashiers
Contact person
Jeremy Cadeau, PE
Phone number
828-891-9632
Dale
10-Mar-08
Drainage area number
II. DESIGN INFORMATION'
Site Characteristics
Drainage area
66,647
ftz
Impervious area
30,658
ftz
%impervious
46.00057017
%
Design rainfall depth
1.0
in
Storage Volume: Non -SR Waters
Minimum volume required
2,577
ft3
Volume provided
2,868
ft3
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
IT,
Volume provided
—ft3
Peak Flow Calculations
Is pre/post control of the 1-yr 24-hr peak flow required?
Y
(Y or N)
1-yr, 24-hr rainfall depth
4.8
in
Rational C, pre -development
0.3
(unitless)
Rational C, post -development
0.6
(unitless)
Rainfall intensity: 1-yr, 24-hr storm
0.2
infhr
Pre -development 1-yr, 24-hr peak flow
4.1
ft3/sec
Post -development 1-yr, 24-hr peak flow
4.6
ft isec
Pre/Post 1 -yr, 24-hr peak flow control
0.5
ft3/sec
Basin Elevations
Basin bottom elevation
95.00
ft
Sediment cleanout elevation
97.00
ft
Bottom of shelf elevation
98.80
ft
Permanent pool elevation
99.30
ft
Top of shelf elevation
100.00
ft
Temporary pool elevation
100.30
ft
Volume and Surface Area Calculations
SAIDA ratio
2.06
(unitless)
Surface area at the bottom of shelf
1275.00
f13
Volume at the bottom of shelf
2800.00
ft3
Permanent pool, surface area required
1,373
It,
Permanent pool, surface area provided
1,397
fe
Permanent pool volume
4,197
ft3
Average depth for SAJDA tables
3.004294918
ft
Surface area at the top of shelf
3700
ft2
Volume at the top of shelf
9000
ft3
X2
OK
Form SW401-Wet Detention Basin-Rev.3 Parts I. & II. Design Summary, Page 1 of 2

• . Permit No.
(to be provided by DWQ)
Forebay %of permanent pool volume
20
%
OK
Temporary pool, surface area provided
3,782
it,
Daawdown Calculations
Treatment volume drawdown time
5
days
OK
Treatment volume discharge rate
0.77
ft31s
Pre -development 1-yr, 24-hr discharge
4.13
ft31s
OK
Post -development 1-yr, 24-hr discharge
3.86
ft'Is
OK
Additional Information
Diameter of orifice
1.00
in
Design TSS removal
85
%
Basin side slopes
3
:1
OK
Vegetated shelf slope
10
:1
OK
Vegetated shelf width
10
ft
OK
Length of flowpath to width ratio
4
:1
OK
Length to width ratio
2
:1
OK
Trash rack for overflow 8 orifice?
Y
(Y or N)
OK
Freeboard provided
1.7
ft
OK
Vegetated filter provided?
Y
(Y or N)
OK
Recorded drainage easement provided?
Y
(Y or N)
OK
Capures all runoff at ultimate build -out?
Y
(Y or N)
OK
Drain mechanism for maintenance or emergencies
Form SW401-Wet Detention Basin-Rev.3 Parts I. & I. Design Summary, Page 2 of 2

Permit Number:
(to be provided by DWQ)
Drainage Area Number:
Wet Detention Basin 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 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 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
Trasb/debris is present.
Remove the trash/debris.
The perimeter of the wet
Areas of bare soil and/or erosive
Regrade the soil if necessary to remove
detention basin
gullies have formed.
the gully, and then plant a ground cover
and water until it is established.
Provide time and a one-time fertilizer
application.
Vegetation is too short or too
Maintain vegetation at a height or
long,
approximately six inches.
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 inlet device: pipe or
The pipe is clogged.
Unclog the pipe. Dispose of the
Swale
sediment off -site.
The pipe is clacked or otherwise
Replace the pipe.
damaged.
Erosion is occurring in the
Regrade the swale 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 a
Search for the source of the sediment
depth greater than the original
and remedy the problem if possible.
design depth for sediment
Remove the sediment and dispose of it
storage.
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 spraying.
The vegetated shelf
Best professional practices show
Prune according to best professional
that pruning is needed to
practices
maintain optimal plant health.
Plants are dead, diseased or
Determine the source of the problem:
dying.
soils, hydrology, disease, etc. Remedy
the problem and replace plants. Provide
a one-time fertilizer application to
establish the ground cover if a soil test
indicates it is necessary
Weeds are present.
Remove the weeds, preferably by hand.
If pesticide is used, wipe it on the plants
rather than spraviruz.
The main treatment area
Sediment has accumulated to a
Search for the source of the sediment
depth greater than the original
and remedy the problem if possible.
design sediment storage depth.
Remove the sediment and dispose of it
in a location where it will not cause
impacts to streams or the BMP.
Algal growth covers over 501/6
Consult a professional to remove and
of the area
control the algal growth.
Cattails, phragmites or other
Remove the plants by wiping them with
invasive plants cover 50% of the
pesticide (do not spray).
basin surface.
Form SW401-Wet Detention Basin I&M-Rev.2

Permit Number:
(to be provided by DWQ)
Drainage Area
BMP element:
Potentialproblem:
How I will remediate theproblem:
The embankment
Shrubs have started to grow on
Remove shrubs immediately.
the embankment.
Evidence of muskrat or beaver
Use traps to remove muskrats and
activity is present.
consult a professional to remove
beavers.
A trcc has started to grow on the
Consult a dam safety specialist to
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 damage
Contact the local NC Division of Water
have occurred at the outlet.
Quality Regional Office, or 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 2 feet in the main pond, the sediment shall be
removed.
When the permanent pool depth reads 1 feet in the forebay, the sediment shall be
removed.
Sediment Removal
Bottom
BASIN DIAGRAM
(fill in the blankv)
0 Permanent Pool Elevation 99.3
LOO Pe lane Pool
------ -- Volume Sediment Removal Elevation 97 Vol
fl Min.
------------------------------ =-------------- ---
Sediment Bottom Elevation 95 1-ft
Storage ed
FOREBAY
MAIN POND
Storage
Form SW401-Wet Detention Basin I&M-Rev.2

I acknowledge and agree by my signature below that 1 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.
Print name: �2,57D0� I r l�1ll�Q
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; Q fiD RQ- uyn'i D a Notary Public for the State of
r / l County of 10ln/� do hereby certify that
�J personally appeared before me this
day of j 7 and acknowledge the due execution of the
forgoing wet detention basin maintenance requirements. Witness my hand and official
seal,
DERSI;e °°oo
?�..��•f•,.....••, fir
0
EQ� ��tTAlr�, e9 0
� r
0
atr°eoaotw°0°�
SEAL
MY aoaueWn EOw ,Aay st, 990
My commission expires