SW8000216_HISTORICAL FILE_20000517

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW8 00 02 16
DOC TYPE
❑ CURRENT PERMIT
❑ APPROVED PLANS
HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
2000 O$ 17
YYYYMMDD

Sta-te'of North Carolina
Department of Environment
and Natural Resources
Wilmington Regional Office
James B. Hunt, Jr., Governor
Bill Holman, Secretary
Division of Water Quality
Mr. Alec Chaplin, Managing Member
Alcon, LLC
1401 Main Street
Columbia, SC 29201
Dear Mr. Chaplin:
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
May 17, 2000
Subject: Permit No. SW8 000216
Shallotte Crossing
High Density Stormwater Project
Brunswick County
The Wilmington Regional Office received a complete Stormwater Management Permit Application for Shallotte
Crossing on April 26, 2000. 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. SW8 000216 dated May 17, 2000, for the construction of Shallotte Crossing.
This permit shall be effective from the date of issuance until May 17, 2010, 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 thirty (30) 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 2761 i-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 Linda Lewis, or
me at [phone].
Sincerely,
CsX—w'�f� � �/✓'�
Rick Shiver
Water Quality Regional Supervisor
RSS/arl: S:\WQS\STORMWAT\PERMIT\000216.MAY
cc: Phil Norris, P.E.
Delaney Aycock, Brunswick County Inspections
Linda Lewis
Wilmington Regional Office
Central Piles
127 Cardinal Dr. Ext., Wilmington, North Carolina 28405 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/10°/ post -consumer paper

State Stormwater Management Systems
Permit No. SW8 000216
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 ofNorth Carolina as amended, and
other applicable Laws, Rules, and Regulations
PERMISSION IS HEREBY GRANTED TO
Alcon, LLC
Shalloue Crossing
Brunswick County
FOR T14E
construction, operation and maintenance of a wet detention pond with vegetated filter 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 May 17, 2010 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•bf 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
1,163,520 square feet of impervious area. This pond must be operated with a vegetated filter.
3. Approved plans and specifications for this project are incorporated by reference and are enforceable parts
of the permit.
The tract will be limited to the amount of built -upon area indicated on page 3 of this, permit, and per
approved plans.

State Stormwater Management Systems
Permit No. SW8 000216
DIVISION OF WATER QUALITY
PROJECT DESIGN DATA SHEET
Project Name:
Shallotte Crossing
Permit Number:
SW8 000216
Location:
Brunswick County
Applicant:
Mr. Alec Chaplin, Managin Member
Mailing Address:
Alcon, LLC
1401 Main Street
Columbia, SC 29201
Application Date: April 26, 2000
Water Body Receiving Stormwater Runoff: UT Woodward Branch / (LBR 15-25-2-8)
Classification of Water Body: "C Sw HQW"
If Class SA, chloride sampling results: n/a
Pond Depth, feet: 7.5
Permanent Pool Elevation, FMSL: 8
Drainage Area, acres: 34.5
Total Impervious Surfaces, ft2: 1,163,520
Outparcels, ft2 Outparcel #1 @61,200 ft2; Outparcel #2 @99;360 ft2
Future, ft2 n/a
Offsite Area entering Pond, fie: none, per Engineer
Required Surface Area, ft2: 29,278
Provided Surface Area, ft2: 31,140
Required Storage Volume, ft': 102,598
Provided Storage Volume, ft': 104,775
Temporary Storage Elevation, FMSL: 11
Controlling Orifice: 4" 4) pipe
3

State Stormwater Management Systems
Permit No. SW8 000216
II. SCHEDULE OF COMPLL4NCE
The stormwater management system shall be constructed in it's 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. All connections into the stormwater system from future areas/outparcels shall be made such that short-
circuiting of the system does not occur.
4. The permittee shall at all times provide the operation and maintenance necessary to assure the permitted
stormwater system functions at optimum efficiency. The approved Operation and Maintenance Plan must
be followed in its entirety and maintenance must occur at the scheduled intervals including, but not limited
to:
a. Semiannual scheduled inspections (every 6 months).
b. Sediment removal.
C. Mowing and revegetation of side slopes.
d. Immediate repair of eroded areas.
e. Maintenance of side slopes in accordance with approved plans and specifications.
f. Debris removal and unclogging of outlet structure, orifice device and catch basins and piping.
g. Access to the outlet structure must be available at all times.
h. The vegetated filter will be kept grassed with no erosion. The spreader mechanism will be kept clear.
5. 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.
6. Decorative spray fountains will not be allowed in the stormwater trcatment system.
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.
R. Upon completion of construction, prior to issuance of a Ccrtificate of Occupancy, aid 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.
9. 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.
10. Prior to the sale of any portion of the property, an access/maintenance easement to the stormwater facilities
shall be granted in favor of the permittee if access to the stormwater facilities will be restricted by the sale
of any portion of the property.
11. The permittee is responsible for verifying that the proposed built -upon area does not exceed the allowable
built -upon area.
rd

State Stormwater Management Systems
Permit No. SW8 000216
12. 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.
13. Deed restrictions must be recorded prior to the sale of any outparcel or future area shown on the approved
plans'to ensure that future owners are made aware of the built -upon area limitations. The following
statements must be recorded:
a. To ensure continued compliance with the NC Division of Water Quality Stormwater Management
Permit Regulations,15A NCAC 2H.1000, the maximum built -upon area for Outparcel #1 is 61,200
flz and for Outparcel #2 is 99,360 ft', as shown on the approved plan. This allotted amount includes
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, driveways, and parking areas, but
does not include raised, open wood decking, or the water surface of swimming pools."
b. "The runoff from all built -upon area on the outparcel must be directed into the permitted stormwater
control system."
C. 'Built -upon area in excess of the permitted amount will require a permit modification."
d. "The connection into the stormwater control shall be made into the forebay area of the detention
pond such that short-circuiting of the system does not occur."
14. A copy of the recorded deed restrictions must be submitted to the DWQ within 30 days of the date of the
recording. The recorded copy must be signed by the permittee, dated, stamped with the deed book number
and page, and bear the stamp of the Register of Deeds.
15. The following items will require a modification to the permit:
a. Any revision to the approved plans, regardless of size.
b. Project name change.
C. Transfer of ownership.
d. Redesign or addition to the approved amount of built -upon area.
e. Further subdivision, acquisition, or sale of the project area. The project area is defined as all property
owned by the permittee, for which Sedimentation and Erosion Control Plan approval was sought.
f. Filling in, altering, or piping of any vegetGotive conveyance shown on the approved plan.
16. The Director may determine that other revisions to the project should require a modification to the permit.
17. The Director may notify the permittee when the permitted site does not meet one or more of the minimum
requirements of 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.
18. Built upon area includes, but is not limited to, structures, asphalt, concrete, gravel, brick, stone, slate,
coquina, driveways and parking areas, but does not include raised, open wood decking, or the water surface
of swimming pools

State Stormwater Management Systems
Permit No. SW8 000216
III. GENERAL CONDITIONS
This permit is not transferable. In the event there is a desire for the facilities to change ownership, or there
is a name change of the Permittee, a formal permit request must be submitted to the Division of Water
Quality accompanied by an application fee, documentation from the parties involved, and other supporting
materials as may be appropriate. The approval of this request will be considered on its merits and may or
may not be approved.
2. Failure to abide by the conditions and limitations contained in this permit may subject the Permittee to
enforcement action by the Division of Water Quality, in accordance with North Carolina General Statute
143-215.6A to 143-215.6C.
The issuance of this permit does not preclude the Permittee from complying with any and all statutes, rules,
regulations, or ordinances which may be imposed by other government agencies (local, state, and federal)
which have jurisdiction.
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 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.
The pe.rmittee shall notify the Division of any mailing address changes within 30 days.
Permit issued this the 17th day of May, 2000.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
Kerr T. Stevens, Director
Division of Water Quality
By Authority of the Environmental Management Commission
Permit Number SW8 000216

State Stormwater Management Systems
Permit No. SW8 000216
Shallotte Crossing
Stormwater Permit No. SW8 000216
Brunswick County
Designer's Certification
as a duly registered
Page 1 of 2
the State of North Carolina, having been authorized to observe (periodically/weekly/full time) the construction of
the project,
ect)
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.
I have checked the items listed on Page 2 of this form as a part of this Certification.
Noted deviations from approved plans and specification:
0W."
Signature
Registration Number
Date

State Stormwater Management Systems
Permit No. S W 8 000216
Certification Requirements: Page 2 of 2
1. The drainage area to the system contains approximately the permitted acreage.
2. The drainage area to the system contains no more than the permitted amount of built -upon area.
3. All the built -upon area associated with the project is graded such that the runoff drains to the system.
4. The outletibypass structure elevations are per the approved plan.
5. The outlet structure is located per the approved plans.
6. Trash rack is provided on the outlet/bypass structure.
All slopes are grassed with permanent vegetation.
8. Vegetated slopes are no steeper than 3:1.
9. The inlets are located per the approved plans and do not cause short-circuiting of the system.
10. The permitted amounts of surface area and/or volume have been provided.
11. Required drawdown devices are correctly sized per the approved plans.
12. All required design depths are provided.
13. All required parts of the system are provided, such as a vegetated shelf, and a forebay.
14. The overall dimensions of the system, as shown on the approved plans, are provided.
cc: NCDENR-DWQ Regional Office
Delaney Aycock, Brunswick County Building Inspector

ONLY' e 6.ry
Date Received Fee Paid Permit Number
2-14-00 cal: 3-2q-0o 5420-#(aZ? '5WZ W021(o
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This form may be photocopied for use as an original
1. GENERAL INFORMATION
1. Applicants name (specify the name of the corporation, individual, etc. who owns the project):
—Alcoa , C-LC
2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
Alec Oh&.Pl,:o , t"a-n&q,r7c Mz.--1ber
3. Mailing Address for person listed in item 2 above:
City: Co l u m to i a, State:5C -zip: 292 o I
Telephone Number: ( 80.3 ) %99 - 9Cv 15S
4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on
plans, specifications, letters, operation and maintenance agreements, etc.):
5h�1107t
5. Location of Proiect (street address)-
6.
7,
�"�� u
Latitude: ' '� Sg <o Longitude: %8 �2Z / 30 i of project"
8. Contact personwhocan, arywer questions about the project:
Name: P/// NOrY/5 Telephone Number:
II. PERMIT INFORMATION:
1. Specify whether project is (check one): ___X_New Renewal Modification
Form SWU-101 Version 3.99 Page 1 of 4

2. If this application is being submitted as the result of a renewal or modification to an existing permit list the
existing permit number A,11,q and its issue date (if known) NSF%
3. Specify the type of project (check one):
_Low Density High Density _Redevelop _General Permit _Other
4. Additional Project Requirements (check applicable blanks):
_CAMA Major Sedimentation/Erosion Control _404/401 Permit X 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) ddescribipg stormwater management for the project.
2. Stormwater runoff from this project drains to the L Urn ber River basin.
3. Total Project Area: 3 SO acres 4. Project Built Upon Area: %% , 42, %
j f
5. How many drainage areas does the project have?.
6. Complete the following information for each drainage area. If there are more than two drainage areas in the
project, attach an additional sheet with the information for each area provided in the same format as below.
BasutInforma6ori ;
Receiving Stream Name
' DrauiagesArea 1 "'i
„. J��,_
4ihamag'e Area'2x
VT Aod
Receiving Stream Class
a 5w Q
Drainage Area
-94, 60 AC -
Existing Impervious* Area
tj 1A
Proposed Im ervious'Area
, 71 O'7 A(�
% Impervious* Area (total)
Z
On-site Buildings
& - 3 1) AC -
wx , r€�
..Dratnage,Area 2.�r.:.
On -site Streets
On -site Parking
145. G
On -site Sidewalks
AC -
Other on -site v
3 Ce6(c AL
Off -site COT' a6t,
.,
Total: 2Co , 7107 AL
Total:
impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas,
sidewalks, gravel areas, etc.
Form SWU-101 Version 3.99 Page 2 of 4

•1
Maintenance activities shall be performed as follows:
After every significant runoff producing rainfall event and at least monthly:
a. Inspect the wet detention basin system for sediment accumulation, erosion, trash accumulation,
vegetated cover, and general condition.
b. Check and clear the orifice of any obstructions such that drawdown of the temporary pool occurs
within 2 to 5 days as designed.
2. Repair eroded areas immediately, re -seed as necessary to maintain good vegetative cover, mow vegetative
cover to maintain a maximum height of six inches, and remove trash as needed.
3. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to
maintain proper functioning.
4. Remove accumulated sediment from the wet detention basin system semi-annually or when depth is
reduced to 75% of the original design depth (see diagram below). Removed sediment shall be disposed
of in an appropriate manner and shall be handled in a manner that will not adversely impact water quality
(i.e. stockpiling near a wet detention basin or stream, etc.).
The measuring device used to determine the sediment elevation shall be such that it will give an accurate
depth reading and not readily penetrate into accumulated sediments.
When the permanent pool depth leads (05 Met in the main pond, the sediment shall be removed.
When the permanent pool depth reads 3 • o feet in the forebay, the sediment shall be removed.
Sediment
Bottom
El. ttl
0
•-----------
on r. D
FOREBAY
BASIN DIAGRAM
(fill in the blanks)
Permanent Pool Elevation 9 • o
Sediment Removal Elevation 5- 35
Bottom Elevation /•
MAIN POND
75%
25%
Remove cattails and other indigenous wetland plants when they cover 50% of the basin surface. These
plants shall be encouraged to grow along the vegetated shelf and forebay berm.
6. If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment
through the emergency drain shall be minimized to the maximum extent practical.
Form SW U-102 Rev 3.99 Page 3 of 4

7. — How was the off -site impervious area listed above derived? �%lfaa
IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
The following italicized deed restrictions and protective covenants are required to be recorded for all
subdivisions, outparcels and future development prior to the sale of any lot. If lot sizes vary significantly, a
table listing each lot number, size and the allowable built -upon area for each lot must be provided as an
attachment.
1. The following covenants are intended to ensure ongoing compliance with state stormwater management permit
number as issued by the Division of Water Quality. These covenants may
not be changed or deleted without the consent of the State.
2. No more than ' square feet of any lot shall be covered by structures or impervious materials.
Impervious materials include asphalt, gravel, concrete, brick, stone, slate or similar material but do not include wood
decking or the water surface of swimming pools.
3. Swales shall not be filled in, piped, or altered except as necessary to provide driveway crossings.
4. Built -upon area in excess of the permitted amount requires a state stormwater management permit modification prior to
construction.
5. All permitted runoff from outparcels or future development shall be directed into the permitted stormwater control
system. These connections to the stormwater control system shall be performed in a manner that maintains the
integrity and performance of the system as permitted.
By your signature below, you certify that the recorded deed restrictions and protective covenants for this project
shall include all the applicable items required above, that the covenants will be binding on all parties and
persons claiming under them, that they will run with the land, that the required covenants cannot be changed or
deleted without concurrence from the State, and that they will be recorded prior to the sale of any lot.
V. SUPPLEMENTFORMS
The applicable state stormwater management permit supplement form(s) listed below must be submitted for
each BMP specified for this project. Contact the Stormwater and General Permits Unit at [phone] for the
status and availability of these forms.
Form SWU-102
Wet Detention Basin Supplement
Form SWU-103
Infiltration Basin Supplement
Form SWU-104
Low Density Supplement
Form SWU-105
Curb Outlet System Supplement
Form SWU-106
Off -Site System Supplement
Form SWU-107
Underground Infiltration Trench Supplement
Form SWU-108
Neuse River Basin Supplement
Form SWU-109
Innovative Best Management Practice Supplement
our VAecet- ' 2 , gr, J 3v0 SF
Form SWU-101 Version 3.99 Page 3 of 4

VI. SUBMITTAL REQUIREMENTS
Only complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ). " 4 A complete package includes all of the items listed below. The complete application package should be
submitted to the appropriate DWQ Regional Office.
I. Please indicate that you have provided the following required information by initialing in the space
provided next to each item.
c • ::. .. "als
• Original and one copy of the Storaiwater Management Permit Application Form
• One copy of the applicable Supplement Form(s) for each BMP ✓
• Permit application processing fee of $420 (payable to NCDENR) ✓
• Detailed narrative description of stormwater treatment/management
• Two copies of plans and specifications, including:
Development/Project name "
-Engineer and firm" _.._
-Legend
- North arrow
- Scale
- Revision number Si 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;`'diaiiiage features; collection systems; and stormwater control measures'`'
- Wetlands delineated, or a note on plans that none exist ' o:�,I "
- Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations
- Drainage areas delineated • "' Y-. _, . • ?P.: ..
'Vegetated buff6s (wheie- Yequued)
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: ; �`n• ...
'_,..Jr Phillip Norris, P. E. '
Designated agent (individual or firm): Andrew & Kuske Consulting Engineers, Inc.
Mailing Address: 902 Market Street
City: Wilmington State: NC Zip: 28401
Phone: L Ql9 1 ::_J42"9653 Fax: ( 4in ) i4t_g�nt
. � o
VIII. APPLICANT'S CERTIFICATION
I, (print or type name of person listed in General Information, item 2) Alec Chaplin
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 protectiv v nants will r orded, anthat the proposed project complies with the requirements of 15A
NCAC 2H .1
.... - .. . .... . /'. t . - ..
Signature: �.... ;<
J,Date:2-2'On' a�
Form SWU-101 Version 3.99 Page 4 of 4

,VIX V 6
APR 2 6 2000
== Andrew & Kuske
CONSULTING ENGINEERS, INC.
John R. Andrew, P.E.
J.A. Kuske, P.E.
J. Phillip Norris, P.E.
902 Market St. • Wilmington, North Carolina 28401-4733 • Telephone [phone] • Fax [phone] • [e-mail]
April 26, 2000
Ms. Linda Lewis
NCDENR/Div. of Environmental Mgmt.
127 Cardinal Drive Extension
Wilmington, NC 28405-3845
Re: Shallotte Crossing
SW8 000216
Additional Information
A & K Project No. 99269
Dear Ms. Lewis:
We are responding to your comments of April 20, 2000 as follows:
1. We have enclosed calculations that demonstrate that the velocity in the vegetated filter
will not exceed 2.0 feet per second for the 2-year storm and will be 2.6 feet per second for
the 10-year storm. This velocity is less than would be considered erosive in a vegetated
channel.
2. The distance from the outlet pipe to the flow spreader is 10 feet.
3. The contours have been modified to indicate a face of from 8.44 to 8.4 across the filter.
4. We anticipate a depth of 1.5 to 1.75 feet in the existing ditch during the 10-year storm. As
such, the filter has been raised to prevent it from becoming a "wet connector ditch".
We have enclosed 2 sets of revised plans, calculations and permit application for your review
and approval. Please let us know if you need any additional information.
Sincerely,
ANDREW &J%SKE
NEERS,
J.lPhillip Wris, P.E.
CC: Connell Radcliff / 15t Carolina Properties
l

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C
3C /
/// o f /' 0 5 F =/ a,-� F r-
7-C7P lg�Y— = 5;0 oA-'

Data for SHALLOTTE CROSSING Page 1
TEN YEAR 24-HOUR RAINFALL- 7.00 IN
Prepared by ANDREW & KUSKE CONSULTING ENGINEERS, INC. 26 Apr 00
HydroCAD 5.01 000479 (c) 1986-1998 Applied Microcomputer Systems
SUBCATCHMENT 1 DETENTION POND DRAINAGE AREA
PEAK= 185.5 CFS O 12.13 HRS, VOLUME= 13.78 AF
ACRES CN SCS TR-20 METHOD
26.71 98 IMPERVIOUS AREA TYPE III 24-HOUR
7.79 50 GREEN AREA RAINFALL= 7.00 IN
34.50 87 SPAN= 10-20 HRS, dt=.02 HRS
Method Comment Tc (min)
TR-55 SHEET PLOW Segment ID: 5.2
n=.02 L=300' P2=4.5 in s=.01 '/'
CIRCULAR CHANNEL Segment ID: 5.0
5=.004 '/' n=.013 V=5.97 fps L=1800' Capacity=42.2 cfs
Total Length= 2100 ft Total Tc= 10.2
SUBCATCHMENT I RUNOFF
DETENTION POND DRAINAGE AREA
180
170
AREA= 34.5 AC
160
Tc= 10.2 MIN
150
CN= 87
140
130
10
SCS TR-20 METHOD
�
110
TYPE III 24-HOUR
U
190
RAINFALL= 7.00 IN
"
90
3
80
PEAK= 185.5 CF5
O
70
e 12.13 HRS
-1
600
VOLUME= 13.78 AF
V Ln ,0
TIME (hours)

Data for SHALLOTTE CROSSING Page 2
TEN YEAR 24-HOUR RAINFALL- 7.00 IN
Prepared by ANDREW & KUSKE CONSULTING ENGINEERS, INC. 26 Apr 00
HydroCAD 5.01 000479 (c) 1986-1998 Applied Microcomputer Systems
REACH 1
POND OUTLET PIPE
Qin = 80.28 CPS
0 12.18
HRS, VOLUME= 7.17 AF
Qout= 80.24
CFS
® 12.18
HRS, VOLUME= 7.17 AF,
ATTEN= Ot, LAG=
.1 MIN
DEPTH END
AREA
DISCH
(FT) (SO
-FT)
(CFS)
42" PIPE
STOR-IND+TRANS
METHOD
0.0
0.0
0.00
PEAK DEPTH=
2.59 FT
.4
.5
1.88
n= .013
PEAK VELOCITY=
10.6 FPS
.7
1.4
7.88
LENGTH= 50 FT
TRAVEL TIME =
.1 MIN
1.1
2.4
17.62
SLOPE= .008 FT/FT
SPAN= 10-20 HRS, dt=.02 HRS
2.5
7.2
75.34
2.8
8.3
87.96
3.3
9.4
96.80
3.4
9.5
95.90
3.5
9.6
89.99
80
75
70
65
60
55
50
V 45
1 40
3 35
O 30
L-J 25
20
15
10
5
oc
REACH I INFLOW 8 OUTFLOW
POND OUTLET PIPE
42" PIPE
n=.013 L=50' 5=.008
STOR-IND+TRANS METHOD
VELOCITY= 10.6 FPS
TRAVEL= .I MIN
Oin= 80.28 CFS
Oout= 80.24 CFS
LAG= .I MIN
N I'1 V In ,D 0 DP m
TIME (hours)

Data for SHALLOTTE CROSSING Page 3
-� TEN YEAR 24-HOUR RAINFALL= 7.00 IN
Prepared by ANDREW & KUSKE CONSULTING ENGINEERS, INC. 26 Apr 00
HydroCAD 5.01 000479 (c) 1986-1998 Applied Microcomputer Systems
REACH 2
VEGETATIVE FILTER SWALE
Qin - 166.4 CFS O 12.18 HRS, VOLUME- 11.28 AF
Qout- 165.8 CPS O 12.19 HRS, VOLUME= 11.27 AF, ATTEN= 0%, LAG= .7 MIN
DEPTH END AREA DISCH
(FT)
(SO -FT)
(CFS)
0.0
0.0
0.00
.4
4.5
3.54
.8
9.9
11.78
1.2
16.4
24.36
1.7
26.2
47.49
2.4
41.5
90.21
3.2
63.0
160.45
4.0
88.5
254.66
100
80
50
40
201
10
O'l
10' x 4' CHANNEL
SIDE SLOPE= .33 '/'
n= .03
LENGTH= 60 FT
SLOPE= .001 FT/FT
STOR-IND+TRANS METHOD
PEAK DEPTH= 3.25 FT
PEAK VELOCITY= 2.6 FPS 041k'�
TRAVEL TIME = .4 MIN
SPAN= 10-20 HRS, dt=.02 HRS
REACH 2 INFLOW & OUTFLOW
UEGETATIUE FILTER SWALE
10' x 4' CHANNEL
SIDE SLOPE= .33 '/'
n=.03 L=60' 5=.001
STOR-IND+TRANS METHOD
VELOCITY= 2.6 FPS
TRAVEL= .4 MIN
TIME (hours)
Oin= 166.4 CFS
Gaut= 165.8 CFS
LAG= .7 MIN

Data for SHALLOTTB CROSSING Page 4
TEN YEAR 24-HOUR RAINFALL= 7.00 IN
Prepared by ANDREW & KUSKE CONSULTING ENGINEERS, INC. 26 Apr 00
HydroCAD 5.01 000479 (c) 1986-1998 Applied Microcomputer Systems
POND 1
SITE DETENTION POND
Qin - 185.5 CPS ® 12.13 HRS, VOLUME= 13.78 AF
Qout- 166.5 CFS ® 12.18 HRS, VOLUME= 11.28 AF, ATTEN= 10%, LAG= 3.2 MIN
Qpri= 80.28 CPS 0 12.18 HRS, VOLUME= 7.17 AF
Qsec= 86.18 CFS ® 12.18 HRS, VOLUME= 4.11 AF
ELEVATION AREA INC.STOR CUM.STOR STOR-IND METHOD
(FT) (SF) (CF) (CF) PEAK STORAGE = 293851 CF
1.5 4800 0 0 PEAK ELEVATION= 13.3 FT
9.0 31140 134775 134775 FLOOD ELEVATION= 14.0 FT
12.0 38710 104775 239550 START ELEVATION= 9.0 FT
14.0 45690 84400 323950 SPAN= 10-20 HRS, dt=.02 HRS
Tdet= 133.4 MIN (8.17 AF)
_# ROUTE INVERT OUTLET DEVICES
1 P 9.0' 4" ORIFICE/GRATE
Q=.6 PI r-2 SQR(2g) SQR(H-r)
2 P 12.0' 16' SHARP -CRESTED RECTANGULAR WHIR
Q=C L H"1.5 C=3.27+.4 H/4 L=Length-0(.1 H)
3 S 12.2' 20' BROAD -CRESTED RECTANGULAR WEIR
Q=C L H-1.5 C=3.8, 3.8, 3.8, 3.8, 0, 0, 0, 0
Primary Discharge
[--1=Orifice/Grate
'2-Sharp-Crested Rectangular Weir
Secondary Discharge
'3=Broad-Crested Rectangular Weir
U
v
3
O
J
L
POND i INFLOW & OUTFLOW
SITE DETENTION POND
STOR-IND METHOD
PEAK STOR= 293851 CF
PEAK ELEV= 13.3 FT
TIME (hours)
Gin= 185.5 CFS
Oaui= 166.5 CFS
Opri= 80.28 CFS
0eec= 86.18 CFS
LAG= 3.2 MIN

Data for SHALLOTTE CROSSING Page 5
-�% TWO YEAR 24-HOUR RAINFALL= 4.50 IN
Prepared by ANDREW & KUSKE CONSULTING ENGINEERS, INC. 26 Apr 00
HydroCAD 5.01 000479 (c) 1986-1998 Applied Microcomputer Systems
REACH 2
VEGETATIVE FILTER SWALE
Qin - 67.99 CFS ® 12.28 HRS, VOLUME= 5.53 AF
Qout- 67.79 CFS ® 12.29 HRS, VOLUME= 5.52 AF, ATTEN= 0%, LAG= .9 MIN
DEPTH END AREA DISCH
(FT)
(SO -FT)
(CFS)
0.0
0.0
0.00
.4
4.5
3.54
.8
9.9
11.78
1.2
16.4
24.36
1.7
26.2
47.49
2.4
41.5
90.21
3.2
63.0
160.45
4.0
88.5
254.66
65
60
55
50
45
ti 40
35
3 30
O 25
20
15
10' x 4' CHANNEL
SIDE SLOPE= .33
n= .03
LENGTH= 60 FT
SLOPE= .001 FT/FT
STOR-IND+TRANS METHOD
PEAK DEPTH= 2.05 FT
PEAK VELOCITY= 2.0 FPS E'
TRAVEL TIME = .5 MIN
SPAN= 10-20 HRS, dt=.02 HRS
REACH 2 INFLOW & OUTFLOW
UEGETATIUE FILTER SWALE
10' x 4' CHANNEL
SIDE SLOPE= .33 '/,
n=.03 L=60' S=.001
STOR-IND+TRANS METHOD
UELOCITY= 2 FPS
TRAVEL= .5 MIN
Din= 67.99 CFS
Oo.t= 67.79 CFS
LAG= .9 MIN
TIME (hours)

Table S.-Maximum permissible
velocities in erodible
channels, based on uniform flow
In continuously wet,
aged channels I
Mulmum permissible
.
velocitles for -
material
Wow
Weer
Clear
WSW
carrying
One
SBu
carrying
and and
grsval
F.pa.
F.Da.
F.P.S.
Fine amid (noncoUoldeU....................
1.5
2.5
1.5
Bandy loam (noncolloldsl)..................
1.7
2.3
2.0
Silt Wam(noncolloidal).....................
2.0
3.0
2.0
Ordinary firm loam .........................
2.3
3.3
2.2
Volcanic uh................................
1-5
3.5
2.2
Fine Pavel .................................
Stld clay (Tery colloidal) ...................
2.5
3.7
6.0
5.0
3.:
3.0
Graded, loam to cobbles, (nuncolloldal).....
2.7
5.0
5.0
Graded silt to cobbles (colloidal)...........
Alluvial silts (nonmllofd J).................
4.0
2.0
5.5
3.6
5.0
2.0
Alluvial sills (WUO,d d).....................
3.7
5.0
3.0
Castle gravel(noocolbldal)................
Cobbles and shingles ........................
4.0
5.0
e.0
5.5
0.5
5.3
Stales and hard pans .......................
all
all
1 5.0
I As recommended by Bixcial Commilt,c on
IrneatlM Its -search, A n¢rlcan
BOClely o1 Civil EIIMII r3. IVN, for channels
sinuous Chonnals multiply sliewalde vodocity
0.9 for mo,ferotely Sinuous e?mincls. and by
with Straight ah"rient. Fee
1110.95 for slightly sinuous, by
04 to highly Sinuous Channels
Maximum permissible velocities In channels
lined with uniform stands of various grass covers, well
maintained I s
Mulmum perrmlr
elite velocity on.
Cow slope range d
will
Erosion. Fully
re eroded
soul I aW
Pereeui7
J.D.e.
J•D•s.
0-5 ..........
e
e
Bermudagrass ..........................
3-10.........
7
5
Over 10.....
e
1
BURRIOoQ133............................
Ken.uexy bluegnm
Od.....
7
5
....................
Bmcolb ?rams ..........................
Y10.........
e
1
Blue grams....... ......................
Over l.....
S
a
Orals minure
M.........
6
1
..........................
o
l5"1'-.......
1
a
eerkea.......................
Weepdeu
Wel ......................
Yellow bluvegrsa
b...stem........................
.
1.5
2.5
Ka.0
Kudsu.................................
.........
Alfalfa ............. .....................
Cream ery..poll........................
Crams
Commonlespedea l....................
)0-5 s.........
3.3
2.3
I From Handbook of Channel Design for %Dil and Wafer Comereanon. (Boa
footnote S table 2.)
I Use vclncitiaover 5 f.p.s. only where good coven and proper maintenance
an he obtained.
I Do not iiw on slolxs ateerwr than 10 persons.
e Use oil sIolxs skrlxr than 5 m•rcent Is not recommended.
I Annuals, used on mild slolxs or as tenipurary protection until permanent
covers are established.

State of North Carolina
Department of Environment
and Natural Resources
Wilmington Regional Office
James B. Hunt, Jr., Governor
Bill Holman, Secretary
Division of Water Quality
April 20, 2000
Mr. Alec Chaplin, Managing Member
Alcon, LLC
1401 Main Street
Columbia, SC 29201
A4A*&1
NCDENP*
NC CARouNA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
Subject: ACKNOWLEDGMENT OF RECEIPT AND
REQUEST FOR ADDITIONAL INFORMATION
Stormwater Project No. SW8 000216
Shallotte Crossing
Brunswick County
Dear Mr. Chaplin:
The Wilmington Regional Office received a Stormwater Management Permit Application for Shallotte
Crossing on March 29, 2000. A preliminary review of that information has determined that the application is
not complete. The following information is needed to continue the stormwater review:
As previously requested, please provide vegetated filter velocity calculations based on the 10
year storm, not the outflow from the orifice.
Please indicate on the filter detail, the horizontal distance of rip rap between the end of the
outlet pipe and the 18" curb and gutter flow spreader.
3. The grading plan only shows elevation 8 in the filter, but the detail indicates that it will fall from
elevation 7.9 to 6.5. Please delineate the 7 contour in the filter area, and maintain the required
3:1 slopes and width for non -erosive distribution of the 10 year storm evenly across the width
of the filter.
4. What is the expected water elevation in the ditch during a 10 year storm, where the pond outlets
into the vegetated filter? If it is above 7, then the "filter" will become merely a wet connector
ditch, which, as previously stated, cannot be permitted.
127 Cardinal Dr. Ext., Wilmington, North Carolina 28405 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/10% post -consumer paper

Mr. Chaplin
April 20, 2000
Stormwater Project No. SW8 000216
n
Please note that this request for additional information is in response to a preliminary review. The
requested information should be received by this Office prior to May 20, 2000, or the application will be
returned as incomplete. The return of a project will necessitate resubmittal of all required items, including the
application fee.
If you need additional time to submit the information, please mail or fax your request for a time
extension to the Division at the address and fax number at the bottom of this letter. The request must indicate
the date by which you expect to submit the required information. The Division is allowed 90 days from
the receipt of a completed application to issue the permit.
The construction of any impervious surfaces, other than a construction entrance under an approved
Sedimentation Erosion Control Plan, is a violation ofNCGS 143-215.1 and is subject to enforcement action
pursuant to NCGS 143-215.6A..
Please reference the State assigned project number on all correspondence. Any original documents that
need to be revised have been sent to the engineer or agent. All original documents must be returned or new
originals must be provided. Copies are not acceptable. If you have any questions concerning this matter please
feel free to call me at [phone].
Sincerely,
v
Linda Lewis
Environmental Engineer
RSS/arl: S:\WQS\STORMWAT\ADDINFO\000216.APR
cc: Linda Lewis
Phil Norris, P.E.
127 Cardinal Dr. Ext., Wilmington, North'Carolina 28405 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50 % recycled/10% post -consumer paper

DETENTION POND ANALYSIS FILE NAME: S:\WQS\POND\000216.WK1
PROJECT #: SW8 000216 REVIEWER: arl
PROJECT NAME: Shallotte Crossing DATE: 20-Apr-2000
Receiving Stream: UT Woodward_ Branch Class: C $w HQW Chlorides: n/a
Drainage Basin: Lumber Index No. 15-25-2-8
Site Area 34.50 acres
Drainage Area 1501802.00i square feet needs to be verified
Area in Acres 34.48 acres
IMPERVIOUS AREA
Rational C-list beside
each item below in E15 to E20
Building
274905.00
square feet
1.00
Concrete
36305.00
square feet
1.00
Pavement
691750.00
square feet
1.00
OP 1
61200.00
square feet
1.00
OP 2
99360.00
square feet
1.00
square feet
TOTAL
kR1463520.00
Cc=
0.82
IMPERVIOUS
77.47%
Des. Depth
7.5 TSS:
85
SURFACE AREA CALCULATION
Rational ?
SA/DA 1.95%
Req. SA 29278 square feet
Prov. SA 31140'square feet
1.00 If Rational is used put a
1" in box E26. If not, leave it blank.
[From plan Contours]
VOLUME CALCULATION
Bottom
Perm. Pool
Design Pool
0.50
&00
11.00
MSL
MSL
MSL
Perm. Pool Volume=
Req. Forebay Volume=
Provided Volume=
Percent=
131900
26380
25100
FT1goh
Design SA
38710
square feet
Des. Storm 1.00>
inches
Req. Volume
102598
cubic feet
Rv= 0.74727434
Prov. Volume
M., 104775
cubic feet
SA @ _
Elevation=
ORIFICE CALCULATION.
Avg. Head =
1.42
ft
Flow Q2, cfs
0.594
Area, in'
14.92
Flow Q5, cfs
0.237
Area, in'
5.97
No. of Orifices Diameter, in
4.00'
Area = 12.566
in'
Q, cfs =
0.500
Drawdown 2.4 days
COMMENTS
Surface Area , Volume and Orifice are within Design Guidelines

Andrew & Kuske
CONSULTING ENGINEERS, INC.
John R. Andrew, P.E.
J.A. Kuske, P.E.
J. Phillip Norris, P.E.
902 Market St. • Wilmington, North Carolina 28401-4733 • Telephone [phone] • Fax [phone] • [e-mail]
March 29, 2000 _ ---
Ms. Linda Lewis MAR
9 2G30
NCDENR/Div. of Environmental Mgmt.
127 Cardinal Drive Extension ,, �,, _ _ _
Wilmington, NC 28405-3845 --A' —
Re: Shallotte Crossing
SW8 000216
Additional Information
A & K Project No. 98070
Dear Ms. Lewis:
_y
We are responding to your comment letter of February 28, 2000 concerning the subject
project as follows:
1. The detail of the vegetated filter has been added to the plans. We have modified the
outlet to discharge parallel to the filter.
2. We have enclosed calculations indicating an acceptable velocity through the filter.
3. The grades at the filter have been modified to provide a minimum of 3:1 slopes.
4. The calculations and application have been revised to indicate future impervious surface
for the two outparcels.
5. The specific BUA limits have been shown on the revised application.
6. The 60-foot ingress/egress easement has been granted to this developer. The pavement
shown within the easement is all that is proposed and no future additions are known.
We are enclosing two sets of revised plans, calculations and application for your continued
review and approval. Please contact us if you need any additional information.
Sincerely,
ANDREW & KUSKE
CONS ENGINEERS, NC.
J. Phillip Norris, P.E.
Enclosures
CC: Alec Chaplin / Alcon, LLC
Connell Radcliff / list Carolina Properties
I
r

State of North Carolina
D partment of Environment
and Natural Resources
Wilmington Regional Office
James B. Hunt, Jr., Governor
Bill Holman, Secretary
Division of Water Quality
February 28, 2000
Mr. Alec Chaplin, Managing Member
Alcon, LLC
1401 Main Street
Columbia, SC 29201
NCDENR
NORTR UROUNA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
Subject: ACKNOWLEDGMENT OF RECEIPT AND
REQUEST FOR ADDITIONAL INFORMATION
Stormwater Project No. SW8 000216
Shallotte Crossing
Brunswick County
Dear Mr. Chaplin:
The Wilmington Regional Office received a Stormwater Management Permit Application for
Shallotte Crossing on February 14, 2000. A preliminary review of that information has determined that the
application is not complete. The following information is needed to continue the stormwater review:
The vegetated filter detail was not on the detail sheet. Please add, and make it specific to this
project. The filter will be at right angles to the outflow. Please take this into account and
indicate how the outlet piping and flow spreader will be angled in order to prevent the runoff
from scouring the side of the filter. Please be aware that this Office Will not permit vegetated
filters which are merely wet connector ditches. They must be properly designed and
constructed as filters. If proper design cannot be demonstrated, please redesign using the
90% TSS chart.
Please provide calculations demonstrating a non -erosive velocity in the filter for the 10 year
storm.
3. There appears to be only 10' allowed to get from the pond at 12 down to the filter at 8, which
equates to a 2.5:1 slope. Please provide a minimum of 3:1.
4. Where on the application or in the calculations do you account for the future impervious area
on the outparcels?
5. Please add specific BUA limits to page 3 of the application for the outparcels. Original page
3 returned to engineer.
6. To whom has the 60' ingress/egress easement labeled as Easement Area # 1 been granted?
There is no proposed pavement other than a portion of the shopping center road shown. Is
other pavement proposed for that easement in the future?
127 Cardinal Dr. Ext., Wilmington, North Carolina 28405 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/10% post -consumer paper

IMN ")
Mr. Chaplin
February 28, 2000
Stormwater Project No. SW8 000216
Please note that this request for additional information is in response to a preliminary review. The
requested information should be received by this Office prior to March 28, 2000, or the application will be
returned as incomplete. The return of a project will necessitate resubmittal of all required items, including
the application fee.
If you need additional time to submit the information, please mail or fax your request for a time
extension to the Division at the address and fax number at the bottom of this letter. The request must
indicate the date by which you expect to submit the required information. The Division is allowed 90
days from the receipt of a completed application to issue the permit.
The construction of any impervious surfaces, other than a construction entrance under an approved
Sedimentation Erosion Control Plan, is a violation of NCGS 143-215.1 and is subject to enforcement action
pursuant to NCGS 143-215.6A.
Please reference the State assigned project number on all correspondence. Any original documents
that need to be revised have been sent to the engineer or agent. All original documents must be returned or
new originals must be provided. Copies are not acceptable. If you have any questions concerning this
matter please feel free to call me at [phone].
Sincerely,
Linda Lewis
Environmental Engineer
RSS/arl: S:\WQS\STORMWAT\ADDINFO\000216.FEB
cc: Linda Lewis
Phil Norris, P.E
127 Cardinal Dr. Ext., Wilmington, North Carolina 28405 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/10 % post -consumer paper

FEB 14 2000 John R. Andrew, P.E.
Andrew & Kuske J.A. Kuske, P.E.
CONSULTING ENGINEERS, INC. BY.�__�__ J. Phillip Norris, P.E.
902 Market St. • Wilmington, North Carolina 28401-4733 • Telephone [phone] • Fax [phone] • okengnrs®wilmington.net
February 10, 2000
NC DENR
Division of Water Quality
127 Cardinal Drive Extension
Wilmington, NC 28405-3845
Attn: Ms. Linda Lewis
RE: Shallotte Crossing
Brunswick County
A&K Project No. 99269
Dear Ms. Lewis:
VPI
Enclosed are two sets of plans for the subject project, two sets of calculations,
the original Division of Water Quality stormwater management permit
application, two copies of the SWU-102 supplement form, two copies of the
stormwater narrative and a $420.00 check for the processing fee.
Please review this information for approval and contact us with any questions or
comments you may have. Thank you for your assistance on this project.
Sincerely,
ANDREW SKE
ONSU INGkINEER , INC.
Phillip Norri
JPN/brs
Enclosures
cc: Alec Chaplin
_rz_�

STORMWATER MANAGEMENT AND
EROSION & SEDIMENTATION CONTROL PLAN
SHALLOTTE CROSSING
BRUNSWICK COUNTY, NORTH CAROLINA
FOR
ALCON, LLC
1401 MAIN STREET
COLUMBIA, SC 29201
D E C E I V E
FEB 14 2000 D
PROJ #SP OOOZI(o
FEBRUARY 2000
PREPARED BY:
ANDREW & KUSKE CONSULTING ENGINEERS, INC.
902 MARKET STREET
WILMINGTON, NORTH CAROLINA 28401
910/343-9653
910/343-9604 (FAX)
A & K #99269

a
NARRATIVE
DESCRIPTION
The site is a 35 acre tract located in Shallotte across Main Street from Smith Avenue
consisting of lightly vegetated sandy clay topsoil and grades ranging from 0.5 % to 10 W
Approximately 32 acres will be graded to allow construction of a shopping mall with
paved parking and paved access. The runoff from the site is estimated using the
rational method 10 year design storm and rainfall data for the area. Construction is
scheduled to begin as soon as all permits and approvals are obtained.
EROSION CONTROL MEASURES
The attached plans and specifications give the requirements for erosion control
measures. Silt fencing will be provided where stormwater would be expected to sheet flow
from disturbed areas directly to adjacent property. Gravel check dams will not be provided
unless the Contractor has to temporarily discharge into an open ditch instead of the
proposed storm drain outfall. The detention pond will be used as a silt basin during
construction and restored to its design contours prior to completion. A gravel construction
entrance will be constructed at all entrances. Maintenance will be provided by the grading
contractor and developer.
STORMWATER MANAGEMENT MEASURES:
The project site is located in Brunswick County. Land disturbance on the site will
exceed on acre which requires the site to comply with state regulations. The stormwater
runoff from the development will be directed to the stormwater detention pond. The
stormwater detention pond was designed to accommodate this site at 80+% impervious
area lot coverage.
CONSTRUCTION SEQUENCE
The Contractor will install the gravel construction entrance and silt fence prior to
beginning any clearing and grading operations. Additional silt fence will be installed when
and if conditions warrant during construction. The detention pond/silt basin will be
constructed immediately after that portion of the site is cleared, and outlet structure with
protection will be installed. Disturbed areas will be landscaped or seeded upon completion.
F4

MAINTENANCE PLAN
1. All erosion and sediment control practices will be checked for stability and operation
following every runoff -producing rainfall but in no case less than once every week. Any
needed repairs will be made immediately to maintain all practices as designed.
2. The sediment basin will be cleaned out when the level of sediment reaches 2.0 ft below
the top of the riser. Gravel will be cleaned or replaced when the sediment pool no longer
drains properly.
3. Sediment will be removed from the sediment trap and block and gravel inlet protection
device when storage capacity has been approximately 50% filled. Gravel will be cleaned or
replaced when the sediment pool no longer drains properly.
4. Sediment will be removed from behind the sediment fence when it becomes about 0.5 ft
deep at the fence. The sediment fence will be repaired as necessary to maintain a barrier.
5. Check ditches, swales, pond banks, and other seeded areas for erosion and
sedimentation after runoff -producing rains. All seeded areas will be fertilized, reseeded as
necessary, and mulched according to specifications in the vegetative plan to maintain a
vigorous, dense vegetative cover. Sediment producing areas should be treated
immediately.
6. Inspect gravel construction roads, entrances, and parking areas periodically for
sediment build-up on surface. Topdress with new gravel as needed.
ii

SECTION 02920
SOIL EROSION AND SEDIMENTATION CONTROL
1. GENERAL
1.1 Contractor shall take every reasonable precaution throughout construction to prevent
the erosion of soil and the sedimentation of streams, lakes, reservoirs, other water
impoundments, ground surfaces, or other property as required by State and Local
regulations.
1.2 The Contractor shall install all required silt fences, sediment basins, check dams, and
construction entrances at the initiation of work, and have these measures reviewed and
approved by the local permit authority prior to clearing and grading operations.
1.3 The Contractor shall, within 15 working days or 30 calendar days of suspension or
completion of land disturbing activities, provide permanent protective covering for disturbed
areas. Temporary and permanent erosion control measures shall be coordinated to assure
economical, effective, and continuous erosion and siltation control throughout the
construction and post -construction period. Use the specified seed for both temporary and
permanent seeding.
2. PRODUCTS
2.1 Asphalt for anchoring mulch shall be Type SS-1 Emulsion.
2.2 Fertilizer shall be 10-10-10 grade or equivalent.
2.3 Lime shall be dolomitic agricultural ground limestone containing not less than 10
percent magnesium oxide.
2.4 Mulch shall be small grain straw, hay, wood chips, asphalt emulsion, jute or other
suitable material free of undesirable weed seed.
2.5 Phosphate shall be 20 percent superphosphate or equivalent.
2.6 Seed for temporary and permanent applications shall be 20% carpet grass, 24%
Bermuda, 20% turf Fescue, 10% Creeping Red Fescue, and 24% Annual Rye grass.
Bermuda seed shall be hulled for warm weather planting and unhulled for cool weather
planting. Purity of seed shall be a minimum of 98 percent and germination shall be a
minimum of 85 percent
2

2.7 Silt fence shall consist of NCDOT Class A fabric supported by wood or metal posts
spaced not more than 6 feet on center. The bottom of the fabric shall be buried a minimum
of 6 inches.
2.8 Gravel for check dams shall be #57 washed stone.
2.9 Aggregate for construction entrance shall be #4 washed stone.
2.10 Stone rip rap for check dams and erosion control shall be NCDOT Class A or B as
shown.
3. EXECUTION
3.1 General: Take every practicable measure during construction or suspension to work to
minimize erosion and siltation. Measures should include good construction practices,
temporary physical barriers to sediment travel, settling basins for new ditches, and
establishment of vegetative cover.
3.2 Construction Practices
3.2.1 Avoid dumping soil or sediment into any wetland or watercourse.
3.2.2 Maintain an undisturbed vegetative buffer where possible between a natural
watercourse and trenching and grading operations.
3.2.3 Avoid equipment crossings of streams, creeks, and ditches where practicable.
3.2.4 Grade all cut, fill and ditch slopes to minimum slope of 3:1, unless otherwise shown
or directed.
3.3 Temporary Physical Barriers are required where sedimentation on off site property or
excessive erosion is a problem.
3.3.1 Mulch shall be used for temporary stabilization of areas subject to excessive erosion
and for protection of seed beds after planting where required.
1. Apply grain straw and hay at a rate of 75 to 100 pounds per 1000 square feet and
wood chips at a rate of 500 pounds per 1000 square feet. Jute and mesh should be
installed as per manufacturer's instructions.
5

2. Asphalt emulsion for slope stabilization should be applied at a rate of 1000
gallons per acre. Asphalt emulsion used for anchoring straw should be applied at a
rate of 150 gallons per ton of straw.
3.3.2 Silt Fences shall be used at the base of slopes to restrict movement of sediment from
the site.
3.3.3 Stone Check Dams, placed at the discharges of creeks, ditches, and swales, shall
consist of Class A rip rap at minimum two feet high and three feet thick across the
watercourse, with a one foot thick layer of gravel on upstream side.
3.4 Vegetative Cover: Establish permanent vegetative cover on all unpaved areas
disturbed by the work.
3.4.1 Preparation of Seedbed: Areas to be seeded shall be scared to a depth of 4 inches
and until a firm, well pulverized, uniform seedbed is prepared. Lime, phosphorous and
fertilizer shall be applied during the scarification process in accordance with the following
rates:
Lime: 45 pounds per 1000 square feet
Phosphorous: 20 pounds per 1000 square feet
Fertilizer: 17 pounds per 1000 square feet
3.4.2 Seeding: Disturbed areas shall be seeded with 2 to 3 pounds per 1000 square feet of
the specified seed mixture. Seed shall be worked into the bed to a depth of 1/4 inch.
3.4.3 Mulch all areas immediately after seeding. Mulch shall be applied and anchored as
specified hereinbefore.
3.5 Construction Entrance: Provide an aggregate drive, 25 feet wide by 50 feet long by 6
inches thick at each entrance to the site used by construction vehicles, until such time as
the permanent roadway is constructed.
3.6 Maintenance: The Owner and Contractor shall be responsible for maintaining all
temporary and permanent erosion control measures. Temporary structures shall be
maintained until such time as vegetation is firmly established in the area protected by the
structure. Permanent streambank protection and grassed areas shall be maintained until
completion of the project. Areas that fail to show a suitable stand of grass or which are
damaged by erosion shall be immediately repaired.
END OF SECTION
3

Permit No. JW F (0002/%
(to be provided b.v DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
WET DETENTION BASIN SUPPLEMENT
This form may be photocopied for use as an original
DWQ Stormwater Management Plan Review:
A complete stormwater management plan submittal includes an application form, a wet detention basin
supplement for each basin, design calculations, and plans and specifications showing all basin and outlet
structure details.
I. PROJECT INFORMATION
Project Name:
Contact Person: ' r hd K+o r r l 1jk'
For projects with multiple basins, specify wh
elevations
Basin Bottom Elevation 1060 ft.
Permanent Pool Elevation DO ft.
Temporary Pool Elevation 0o ft.
Phone Number: (410) 3�3-C(lv53
basin this worksheet applies to:
areas
Permanent Pool Surface Area 31,1440 sq. ft.
Drainage Area 34+60 ac.
Impervious Area 7!0 , ?I ac.
(floor of the basin)
(elevation of the orifice)
(elevation of the discharge structure overflow) '
(water surface area at the orifice elevation)
(on -site and off -site drainage to the basin)
(on -site and off -site drainage to the basin)
volumes
Permanent Pool Volume 131 Cfoo cu. ft. (combined volume of main basin and forebay)
Temporary Pool Volume OT cu. ft. (volume detained above the permanent pool)
Forebay Volume 'L5_; 100 cu. ft. (approximately 20% of total volume)
Other parameters
SA/DA t
Diameter of Orifice
Design Rainfall
Design TSS Removal 2
Form SWU-102 Rev 3.99
I•9 (surface area to drainage area ratio from DWQ table)
• 0 in. (2 to 5 day temporary pool draw -down required)
1.0 in.
_ 66 % (minimum 85% required)
Paget of 4

Footnotes:
t
When using the Division SAIDA tables, the correct SAIDA ratio for permanent pool sizing should be computed based upon the
actual impervious % and permanent pool depth. Linear interpolation should be employed to determine the correct value for non-
standard table entries.
In the 20 coastal counties, the requirement for a vegetative filter may be waived if the wet detention basin is designed to provide
90% TSS removal. The NCDENR BMP manual provides design tables for both 85% TSS removal and 90% TSS removal.
II. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Stormwater Best Management Practices Manual
(N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code
Section: 15 A NCAC 2H .1008.
Initial in the space provided to indicate the following design requirements have been met and supporting
documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit
Application Form, the agent may initial below. If a requirement has not been met, attach justification.
a' Theperdidtlent pool depth is between 3 and/feet (required rrunimum of 3 feet).
b. The forebay volume is approximately equal to 20% of the basin volume.
c. The temporary pool controls runoff from the design storm event.
d. The temporary pool draws down in 2 to 5 days. ;
e. If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow
calculations)
f. The basin length to width ratio is greater than 3:1.
g. The basin side slopes above the permanent pool are no steeper than 3:1.
h. A submerged and vegetated perimeter shelf with+a slope of 6:1 or less (show detail).
i. Vegetative cover above the permanent pool elevation is specified.
j. A trash rack or similar device is provided for both the ^overflow and orifice.
k. A recorded drainage easement is provided for each basin including access to nearest right-
of-way.
1. If the basin is used for sediment and erosion control! during construction, clean out of the
basin is specified prior to use as a wet detention•basin.., ,t
1.q, .
in. A mechanism is specified which will drain the, basin for maintenance or an emergency.
III. WET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the
vegetated filter if one is provided.
This system (check one) does 0 does not incorporate a vegetated filter at the outlet.
This system (check one) 0 does (does not incorporate pretreatment other than a forebay.
Form SWU-102 Rev 3.99 Page 2 of 4

7,'All components of the wet detention basin system shall be maintained in good working order.
I acknowledge and agree by my signature below that 1 am responsible for the performance of the seven
maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any
changes to the system or responsible party.
Print name: Alec Chaplin
Title: Managing Mamhar
Note: The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and
a resident of the subdivision has been named the president.
I, �V�+VII I NIQ.VCP✓ a Notary Public for the State of S()ttiVl �(Gliha,
Countyof l,_t i� � -,do hereby certify that ler IA CIT1
personally appeared before•me'this j
day ofILL and acknowledge the due
execution of the forgoing wet detention basin maintenance requirements. Witness my hand aad official seal,
�= r.' _L;
SEAL _
My commission expires MYCommtssinni=xrh,: ho „y ,�.ro6 , sJ
Form SWU-102 Rev 3.99 Page 4 of 4

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