HomeMy WebLinkAboutSW8040323_HISTORICAL FILE_20040412STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW8 O` c} '523
DOC TYPE
❑ CURRENT PERMIT
❑ APPROVED PLANS
® HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
20C)LA 0 412-
YYYYMMDD
Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E.,Director
Division of Water Quality
Coleen H. Sullins, Deputy Director
Division of Water Quality
April 12, 2004
Mr. Jon T. Vincent, Member Manager
Tri-Coast Properties, LLC
1508 Military Cutoff Road, Suite 302
Wilmington, NC 28403
Subject: Permit No. SW8 040323
Shallotte Shops
High Density Stormwater Project
Brunswick County
Dear Mr. Vincent:
The Wilmington Regional Office received a complete Stormwater Management Permit
Application for Shallotte Shops on April 8, 2004. 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 040323 dated April 12,
2004, for the construction of Shallotte Shops.
This permit shall be effective from the date of issuance until April 12, 2014, 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 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 Laurie Munn, or me at (910) 395-3900.
Sincerely,
Rick Shiver
Water Quality Regional Supervisor
RSS/:Ism S:\WQS\STORMWAT\PERMIT\040323.apr04
cc: Mike Hoffer
Brunswick County Building Inspections
Laurie Munn
Wilmington Regional Office
Central Files /�
N. C. Division of Water Quality 127 Cardinal Drive Extension (910) 395-3900 Customer Service *A
Wilmington Regional officeWilmington, NC 28405 (910) 350-2004 Fax 1 800 623-7748 �DENR
State Stormwater Management Systems
Permit No. SW8 040323
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
Trl-Coast Properties, LLC
Shallotte Shops
Brunswick County
FOR THE
construction, operation and maintenance of a wet detention basin 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 April 12, 2014, and shall be subject
to the following specified conditions and limitations:
1. 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 on page 3 of this permit, the Project Data Sheet. The stormwater control has
been designed to handle the runoff from 64,027 square feet of impervious area.
3. The tract will be limited to the amount of built -upon area indicated on page 3 of this
permit, and per approved plans.
4. All stormwater collection and treatment systems must be located in either dedicated
common areas or recorded easements. The final plats for the project will be recorded
showing all such required easements, in accordance with the approved plans.
5. The runoff from all built -upon area within the permitted drainage area of this project must
be directed into the permitted stormwater control system. A permit modification must be
submitted and approved prior to the construction of additional built -upon area from
outside of the approved drainage area.
State Stormwater Management Systems
Permit No. SW8 040323
DIVISION OF WATER QUALITY
PROJECT DESIGN DATA SHEET
Project Name:
Permit Number:
Location:
Applicant:
Mailing Address:
Application Date:
Receiving Stream/River Basin:
Stream Index Number:
Classification of Water Body:
Drainage Area, acres:
Onsite, sq. ft.:
Offsite, sq. ft.:
Total Impervious Surfaces, sq. ft.:
Pond Depth, feet:
TSS removal efficiency:
Permanent Pool Elevation, FMSL:
Permitted Surface Area, sq. ft.:
Permitted Storage Volume, cubic ft.:
Temporary Storage Elevation, FMSL:
Controlling Orifice:
Permitted Forebay Volume, cubic ft.:
Shallotte Shops
SW8 040323
Brunswick County
Mr. Jon Vincent
Tri-Coast Properties
1508 Military Cutoff Road, Suite 302
Wilmington, NC 28403
April 8, 2004
Shallotte River / Lumber
15-25-2-(7.5)
"SC HQW"
2.04
88,652
none, per engineer
64,027
5
90% (no filter is required)
31.0
4,615 @ Permanent Pool
5,679
32.1
1" � (drawdown in 2-5 days)
2,595
3
State Stormwater Management Systems
Permit No. SW8 040323
II. SCHEDULE OF COMPLIANCE
The stormwater management system shall be constructed in its entirety, vegetated and
operational for its intended use prior to the construction of any built -upon surface.
2. During construction, erosion shall be kept to a minimum and any eroded areas of the
system will be repaired immediately.
3. The permittee shall at all times provide the operation and maintenance necessary to assure
the permitted stormwater system functions at optimum efficiency. The approved
Operation and Maintenance Plan must be followed in its entirety and maintenance must
occur at the scheduled intervals including, but not limited to:
a. Semiannual scheduled inspections (every 6 months).
b. Sediment removal.
C. Mowing and revegetation of slopes and the vegetated filter.
d. Immediate repair of eroded areas.
e. Maintenance of all slopes in accordance with approved plans and specifications.
f. Debris removal and unclogging of outlet structure, orifice device, flow spreader,
catch basins and piping.
g. Access to the outlet structure must be available at all times.
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.
Decorative spray fountains will be allowed in the stormwater treatment system, subject to
the following criteria:
a. The fountain draws its water from less than 2' below the permanent pool surface.
b. Separated units, where the nozzle, pump and intake are connected by tubing, may
be used only if they draw water from the surface in the deepest part of the pond.
C. The falling water from the fountain must be centered in the pond, away from the
shoreline.
d. The maximum horsepower for the fountain's pump is based on the permanent
pool volume. The maximum pump power for a fountain in this pond is 1/8
horsepower.
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.
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.
8. If the stormwater system was used as an Erosion Control device, it must be restored to
design condition prior to operation as a stormwater treatment device, and prior to
occupancy of the facility.
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:
0
State Stormwater Management Systems
Permit No. SW8 040323
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.
C. Further subdivision, acquisition, or sale of all or part of the project area. The
project area is defined as all property owned by the permittee, for which
Sedimentation and Erosion Control Plan approval or a CAMA Major permit was
sought.
f. Filling in, altering, or piping of any vegetative conveyance shown on the approved
plan.
10. The permittee shall submit final site layout and grading plans for any permitted future
areas shown on the approved plans, prior to construction. If the proposed BUA exceeds
the amount permitted under this permit, a modification to the permit must be submitted
and approved prior to construction.
11. 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.
12. At least 30 days prior to the sale or lease of any portion of the property, the permittee
shall notify DWQ and provide the name, mailing address and phone number of the
purchaser or leasee. 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 or lease of any portion of the property.
13. The permittee must maintain compliance with the proposed built -upon area and ensure
that the runoff from all the built -upon is directed into the permitted system.
14. 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.
15. The permittee must maintain the current permitted drainage area. No additional runoff
from outside of the permitted drainage area boundary may enter the permitted stormwater
facilities without first applying for and receiving a permit modification.
Ill. 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 penmittee 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.
2. Failure to abide by the conditions and limitations contained in this permit may subject the
Permittee to enforcement action by the Division of Water Quality, in accordance with
North Carolina General Statute 143-215.6A to 143-215.6C.
3. The issuance of this permit does not preclude the Permittee from complying with any and
all statutes, rules, regulations, or ordinances which may be imposed by other government
agencies (local, state, and federal) which have jurisdiction.
State Stormwater Management Systems
Permit No. SW8 040323
4. In the event that the facilities fail to perform satisfactorily, including the creation of
nuisance conditions, the Permittee shall take immediate corrective action, including those
as may be required by this Division, such as the construction of additional or replacement
stormwater management systems.
The permittee grants DENR Staff permission to enter the property during normal business
hours for the purpose of inspecting all components of the permitted stonmwater
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.
Unless specified elsewhere, permanent seeding requirements for the stormwater control
must follow the guidelines established in the North Carolina Erosion and Sediment
Control Planning and Design Manual.
8. Approved plans and specifications for this project are incorporated by reference and are
enforceable parts of the permit.
9. The permittee shall notify the Division any name, ownership or mailing address changes
within 30 days.
Permit issued this the 12th day of April 2004.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
Al
I an W.
Klimek, P.E.; Director
Division of Water Quality
By Authority of the Environmental Management Commission
0
State Stormwater Management Systems
Permit No. SW8 040323
Shallotte Shops
Stormwater Permit No. SW8 040323
Brunswick County
Designer's Certification
1,
as a duly registered
in the State of North Carolina, having been authorized to observe (periodically/weekly/full time)
the construction of the project,
(Proj 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.
The checklist of items on page 2 of this form is included in the Certification.
Noted deviations from approved plans and specification:
SEAL
Signature
Registration Number
Date
State Stormwater Management Systems
Permit No. SW8 040323
Certification Requirements:
The drainage area to the system contains approximately the permitted acreage.
2. The drainage area to the system contains no more than the permitted amount of
built -upon area.
3. All the built -upon area associated with the project is graded such that the runoff
drains to the system.
4. The outlet bypass structure elevations are per the approved plan.
5. The outlet structure is located per the approved plans.
6. Trash rack is provided on the outletibypass 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.
it. 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
Brunswick County Building Inspections
"OFFICE USE ONLY
Date Received
Fee Paid
Perrm Number
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This form maybe photocopied for use as an original
I. GENERAL INFORMATION
1. Applicants name (specify the name of the corporation, individual, etc. who owns the project):
Tri-Coast Properties, LLC
2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
Jon T. Vincent, Member Manager
3. Mailing Address for person listed in item 2 above:
1508 Military Cutoff Road, Suite 302
City: Wilmington State: NC Zip:
Telephone Number: 910-256-0101
4. Project Name (subdivision, facility, or establishment name — should be consistent with project name on
plans, specifications, letters, operation and maintenance agreements, etc.):
Shallotte Shops
5. Location of Project (street address):
City: Shallotte County: Brunswick
6. Directions to project (from nearest major intersection):
From the intersection of US 211 and US 17, travel south on 17 approximately 4 miles.
Site is on west side of the road
7. Latitude : N 340 03' 00" Longitude: W 770 00' 00" of project
8. Contact person who can answer questions about the project:
Name: Phillip Tripp Telephone Number: 910-763-5100
It. PERMIT INFORMATION:
1. Specify whether project is (check one): X New Renewal Modification
Form SWU-101 Version 3.99 Page] of4
If this application is being submitted as the result of a renewal or modification to an existing permit, list
The existing permit number and its issue date (if known)
3. Specify the type of project (check one):
Low Density X High Density Redevelop General Permit Other
4. Additional Project Requirements (check applicable blanks):
CAMA Major X 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.
Ill. PROJECT INFORMATION
I. 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.
Stormwater will be treated with wet detention
2. Stormwater runoff from this project drains to the Cape Fear River basin.
3. Total Project Area: 2.04 acres
5. How many drainage basins does the project have? 1
4. Project Built Upon Area: 72.2 %.
6. Complete the following information for each drainage area. If there are more than two drainage areas in the
project, attach an additional sheet with the information for each area provided in the same format as below.
Basin Information � • . ,,
t= ,� �iD,raina e�Basiml'
g Ba
,. � Drainage;Basin2-, •'
:
Receiving Stream Name
Shallotte River
Receiving Stream Class
SC HOW
Drainage Basin Area
2.04 ac
Existing Impervious * Area
-
Proposed Impervious * Area
1.47 ac
% Impervious* Area (total)
Impervious * Surface Area
Drainage Basin I
Drainage Basin 2
On -site Buildings
19,894 sf
On -site Streets
-
On -site Parking
41,426 sf
On -site Sidewalks
2,707 sf
Other on -site
-
Off -site
Total:
E=64,027 sf
E=
* 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
7. How was the off -site impervious area listed above derived?
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 of 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 modi/icauion prior
to construction.
5. All permitted runofffrom 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. 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 (910) 733-5083 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
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).
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.
Applicant's Initials
• Original and one copy of the Stormwater 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 and 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 sizes, 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): Tripp Engineering, P.C.
Mailing Address: 419 Chestnut Street
City: Wilmington State: NC Zip: 28401
Phone: (910) 763-5100 Fax: (910) 763-5631
VIII.
S CERTIFICATION
1, (print or type name ofperson list ,I in General Information, item 2) Jon T. Vincent
certify that the inform tion includ d on this permit application form is, to the best of my knowledge, correct and
that the project will be congtruct in conformance with the approved plans, that the required deed restrictionsn and protectiv@ covea s will be ecorded, and that the proposed project complies with the requirements of 15A
NCAC 2H .l ONO.
Signature:
Form SWU-101 V Version 3.99 Page 4 of 4
Date: 3/ 1 b 0 ,
Permit No.'' olk 3a 3
(to be provided by DFV0
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
DWO Stormwater Management Plan Review:
A complete stormwater management plan submittal includes a wet detention basin supplement for each basin,
design calculations, plans and specifications showing all basin and outlet structure details, and a signed and
notarized operation and maintenance agreement.
1. PROJECT INFORMATION (please complete the following information):
Project Name: Shallotte Shops
Contact Person: Phillip Tripp Phone Number: (910) 763-5100
For projects with multiple basins, specify which basin this worksheet applies to: 1
elevations
Basin Bottom Elevation 26 ft.
Permanent Pool Elevation 31 ft.
Temporary Pool Elevation 32.1 ft.
areas
Permanent Pool Surface Area 4 615 sq.ft.
Drainage Area 2.04 ac.
Impervious Area 1.47 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 13,258 cu.ft. (combined volume of main basin and forebay)
Temporary Pool Volume 5,679 cu.ft. (volume detained above the permanent pool)
Forebay Volume 2,595 cu.ft. (approximately 20% of total volume)
Other parameters
SA/DA' .0514 (surface area to drainage area ratio from DWQ table)
Diameter of Orifice 1 in. (2 to 5 day temporary pool draw -down required)
Design Rainfall 1 in.
Design TSS Remova12 90 % (minimum 85% required)
Form SWU-102 Rev 3.99 Page 1 of 4
Footnotes:
I. When using the Division SA/DA tables, the correct SA/DA ratio for permanent pool sizing should be computed based upon the
actual impervious % and permanent pool depth. Linear interpolation should be employed to determine the correct value for non-
standard table entries.
2. In the 20 coastal counties, the requirement for a vegetative filter may be waived if the wet detention basin is designed to provide
90% TSS removal. The NCDENR BMP manual provides design tables for both 85% TSS removal and 90% TSS removal.
it. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Stormwater Best Management Practices Manual
(N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code
Section: 15 A NCAC 2H .1008.
Initial in the space provided to indicate the following design requirements have been met and supporting
documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit
Application Form, the agent may initial below. If a requirement has not been met, attach justification.
Applicants Initials
IVH a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet).
AMb. The forebay volume is approximately equal to 20% of the total basin volume.
c. The temporary pool controls runoff from the design storm event.
�64 d. The temporary pool draws down in 2 to 5 days.
MA e. If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow
calculations).
04 `4 f The basin length to width ratio is greater than 3:1.
aA A g. The basin side slopes above the permanent pool are no steeper than 3:1.
&0 h. A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail).
rfA_A i. Vegetative cover above the permanent pool elevation is specified.
r • vA j. A trash rack or similar device is provided for both the overflow and orifice.
M-A k. A recorded drainage easement is provided for each basin including access to nearest right-
of-way.
A 1. If the basin is used for sediment and erosion control during construction, clean out of the
'n n basin is specified to be performed prior to use as a wet detention basin
in. A mechanism is specified which will drain the basin for maintenance or an emergency.
III. WET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the
vegetated filter if one is provided.
This system (check one) 0 does X does not incorporate a vegetated filter at the outlet.
This system (check one) ❑ does X does not incorporate pretreatment other than a forebay.
Form SWU-102 Rev 3.99 Page 2 of 4
Maintenance activities shall be performed as follows:
After every significant runoff producing rainfall event and at least monthly:
a. Inspect the wet detention 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.
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 not be handled in a manner that will adversely impact water quality
(i.e. stockpiling near a wet detention basin or stream, etc.).
The measuring device used to determine the sediment elevation shall be such that it will give an accurate
depth reading and not readily penetrate into accumulated sediments.
When the permanent pool depth reads 3.75_ feet in the main pond, the sediment shall be removed.
When the permanent pool depth reads _2.25 feet in the forebay, the sediment shall be removed.
BASIN DIAGRAM
(fill in the blanks)
Permanent Pool Elevation 31
Sediment moval El. 28.75 75 0
/o Sediment Removal Elevation 27.25 75
Bottom evation 28 % o
FOREBAY
Bottom Elevation
MAIN POND
5. Remove cattails and other indigenous wetland plants when they cover 50% of the basin surface. These
plants shall be encouraged to grow along the vegetated shelf and forebay berm.
6. If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment
through the emergency drain shall be minimized to the maximum extent possible.
7. All components of the wet detention basin system shall be maintained in good working order.
I acknowledge and agree by my signature below that I am responsible for the performance of the seven
maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any
changes to the system or responsible party.
Print name:
Title:
Address:
Phone:
Signature:
Date:
'l.
Note: The legaafly responsible party should not be a homeowners association unless more than 50% of the lots have been sold and
a resident tic subdivision has been named the president.
1 1 �5qVI ',,,--, a Notary Public for the State of North Carolina
County of ����\9\� , do hereby certify that Jon T. Vincent
personally appeared before me this J1!ETNA_ day of March 2004 , and acknowledge the due
execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal,
SEAL
My commission expires
Fonn SWU-102 Rev 3.99 Page 4 of 4
TRIPP ENGINEERING, P.C.
479 Chestnut Sweet
Wilmington, North Carolina 23401
Phone: (910) 763-5100 • FAX: (910) 763-5631
April 8, 2004
NCDENR
Division Water Quality
127 Cardinal Drive
Wilmington, NC 28405-3845
Attn: Ms. Laurie Munn
Re: Shallotte Shops
Project No. SW8 040323
TE 03128
Dear Laurie:
In response to your comments, dated March 31, 2004, we offer the following:
1. A note stating that no wetlands exist on site has been added to the plan.
2. A note regarding roof drainage has been added.
3. This is an existing ditch and has been labeled as existing on the plan.
Please review for approval and contact us with any questions, comments or if you
need additional assistance. Thank you.
Sincerely,
Tripp Engineering, P.C.
MBH:dcb
Enc.
APR 0 8 Z004
N
Y
Mr. Jon T. Vincent, Member Manager
Tri-Coast Properties, LLC
1508 Military Cutoff Road, Suite 302
Wilmington, NC 28403
Dear Mr. Vincent:
Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E.,Director
Division of Water Quality
Coleen H. Sullins, Deputy Director
Division of Water Quality
March 31, 2004
Subject: REQUEST FOR ADDITIONAL INFORMATION
Stormwater Project No. SW8 040323
Shallotte Shops
Brunswick County
The Wilmington Regional Office received a Stormwater Management Permit Application for
Shallotte Shops on March 29, 2004. A preliminary review of that information has determined that the
application is not complete. The following information is needed to continue the stormwater review:
1. Please either delineate all wetlands on site, disturbed or undisturbed, or note on the plans
that none exist.
2. Please provide a note on the plans that all roof drainage will be directed so as to be
picked up by the pond.
3. The off -site drainage from the Simmons property will be directed away from the pond by
a ditch. Is this ditch proposed or existing? If the ditch is proposed, please provide a
detail.
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 April 7, 2004, 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.
N. C. Division of Water Quality 127 Cardinal Drive Extension (910) 395-3900 Customer Service AMA
Wilmington Regional Office Wilmington, NC 28405 (910) 350-2004 Fax 1 800 623-7748 NZ.°DENR
Mr. Jon Vincent
Page 2
March 31, 2004
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 (910) 395-3900.
Sincerely,
Laurie Munn
Environmental Engineer
RSS/:Ism S:\WQS\STORMWAT\ADDINFO\2004\040323.mar04.doc
cc: Laurie Munn
Mike Hoffer
State of North Carolina
Department of Environment
and Natural Resources
Wilmington Regional Office
Division of Land Resources
Land Quality Section
Michael F. Easley, Governor
William G. Ross Jr., Secretary
IVA
Ad
NC®ENR
NORTH CAROUINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
March 29. 2004
NOTICE OF RECEIPT OF EROSION & SEDIMENTATION CONTROL PLAN
Tri-Coast Properties, LLC
Mr. Jon T. Vincent, Member/Manager 313
Military Cutoff Road l�U /
Wilmington, NC 28403
Dear Mr. Vincent:
This office has received a soil erosion and sedimentation control plan for the project listed below which was
submitted as required by the North Carolina Sedimentation Pollution Control Act (NCGS 113A-57(4)).
Please be advised that this Act requires that all persons disturbing an area of one or more acres of land must
obtain approval of a soil erosion control plan prior to the commencement of said land -disturbing activity (NCGS 113A-
54(d)(4)). The Act further states that this plan must be filed a minimum of 30 days prior to the activity and the
approving authority must approve or disapprove the submitted plan within 30 days of receipt. Failure of the approving
authority to approve or disapprove the submitted plan within the 30 day period will be deemed approval of the plan
if the submitted plan is complete. Commencement or continuation of a land -disturbing activity under the jurisdiction
of this Act prior to the approval of an erosion & sediment control plan is a violation of the Act.
A copy of any erosion and sediment control plan which could involve the utilization of ditches for the purpose
of dewatering or lowering the water table is forwarded by this office to the Division of Water Quality (DWQ). It is .
suggested that you contact the Division of Water Quality at (910) 395-3900 if the ditches shown on your plan will
lower the water table.
We have performed a preliminary review of your submitted plan and have determined that additional information
will be necessary before a final review can be completed. Enclosed is a checklist of items that must be submitted
before we can complete the review process. Failure to provide the additional information may result in disapproval
of your plan.
The approval of an erosion and sediment control plan is conditioned on the applicant's compliance with Federal
and State water quality laws, regulations and rules.
If you have questions or need additional information, please do not hesitate to contact this office. Your
cooperation in this matter is appreciated and we look forward to working with you on this project.
Sincerely,
am �rc)
Kevin R. Rowland
Environmental Technician
KRR:bfr
cc: Michael Hoffer; Tripp Engineering
PROJECT NAME: Shallotte Shops
PROJECT NO.: Bruns-2004-269
LOCATION: US Highway 17 - Brunswick County
RIVER BASIN: Cape Fear
SUBMITTED BY: Tripp Engineering
DATE RECEIVED BY L.Q.S.: March 29, 2004
127 North Cardinal Drive, Wilmington, N.C. 28405-3845 • Telephone 910-395-3900 • Fax 910-350-2004
An Equal Opportunity Affirmative Action Employer
NORTH CAROLINA DEPARTMENT of ENVIRONMENT & NATURAL RESOURCES
LAND QUALITY SECTION WILMINGTON REGIONAL OFFICE
PROJECT NAME: Shallotte Shops
PROJECT NUMBER: Bruns-2004-269
DATE: March 29, 2004
COUNTY: Brunswick
EROSION & SEDIMENT CONTROL PLAN PRELIMINARY REVIEW CHECKLIST
To expedite the approval process, a cursory review of your submitted Erosion and Sediment Control Plan application
has been made and has shown the need for additional information as specified below. To meet our review schedule,
any additional information should be received by this Regional Office no later than April 18, 2004. Failure to meet
this schedule may result in disapproval of your plan.
LOCATION INFORMATION - -
STORMWATER CALCULATIONS
Project location (roads, streets, landmarks)
Preconstmction runoff calculations for each outlet from the site
North arrow and scale
(at peak discharge points)
GENERAL. SITE FEATURES (Plan elements)
_ Design calculations for peak discharges ofrunoff(including the
construction phase & the final runoff coefficients of the site)
_ Design calcs of culverts and storm sewers
Legend: North arrow, scale, etc.
Dischargeand velocity calculations foropen channel andditch
Property lines
fows(easement & right-of-ways)
Existing contours (topographic lines)
Design calos of cross sections and method of stabilization of
Proposed contours
existing and planned channels (include temporary linings)
Limits of disturbed area (provide acreage total, delineate
Design calcs and construction details of energy dissipators
limits, and label)
below culvert and storm sewer outlets (diameters & apron
Planned and existing building locations and elevations
dimensions)
Planned & existing road locations & elevations
Lot and/or building numbers
VEGETATIVE STABILIZATION
Geologic features: rock outcrops, seeps, springs,
wetland and their limits, streams, lakes, ponds, dams, etc
Area & acreage to be vegetatively stabilized
Easements and drainageways
Method of soil preparation
Profiles of streets, utilities, ditchlines, etc.
Seed type & rates (temporary & permanent)
Stockpiled topsoil or subsoil locations
Fertilizer type and rates
If the same person conducts the land -disturbing activity
Mulch type and rates
& any related borrow or waste activity, the related borrow
or waste activity shall constitute part of the land-
disturbing activity unless the borrow or waste activity is
NOTE: Plan should include provisions for groundcover on
regulated under the Mining Act of 1971, or is a landfill
exposed slopes within 15 working days or 30 calendar
days (whichever is shorter), following completion of any
regulated by the Division of Solid Waste Management.
If the land -disturbing activity and any related borrow or
phase of grading; permanent groundcover for all
waste activity are not conducted by the same person,
disturbed areas within 15 working days or 90 calendar
days (whichever is shorter) following completion of
they shall be considered separate land -disturbing
activities and must be permitted either through the
construction or development.
Sedimentation Pollution Control Act as a one -use borrow
site or through the Mining Act.
FINANCIAL RESPONSIBILITY/OWNERSHIP FORM
EROSION CONTROL MEASURES (on elan
Legend
Location of temporary measures
_ Location of permanent measures
Construction drawings and details for
temporary and permanent measures
Maintenance requirements of measures
Contact person responsible for maintenance
SITE DRAINAGE FEATURES
Existing and planned drainage patterns (include off -site
areas that drain through project)
Method of determination and calculations for Acreage of
land being disturbed
Size and location of culverts and sewers
.Soil information: type, special characteristics
.Soil information below culvert storm outlets
Name and classification of receiving water course or
name of municipal operator (only where stormwater
discharges are to occur)
Completed, signed & notarized FR/O Form
Accurate application fee ($50.00 per acre rounded up the next
acre with no ceiling amount)
Certificate of assumed name, if the owner is a partnership
Name of Registered Agent (if applicable)
Copy of the most current Deed for the site
NOTE: The Express Permitting Option is available, but there is a
supplemental fee charge of $250.00 per acre (rounded up
to the next acre) up to eight (8) acres, after which the
Express Permitting supplement is a fixed $2,000.00 (the
normal fee continues to increase).
NARRATIVE AND CONSTRUCTION SEQUENCE
Narrative describing the nature & purpose of the construction
activity
Construction sequence related to erosion and sediment control
(including installation of critical measures prior to the initiation
of the land -disturbing activity & removal of measures after
areas they serve are permanently stabilized)
Bid specifications related only to erosion control
OTHER INFORMATION Please address sediment storage issues during the construction phase.
127 Cardinal Drive Extension, Wilmington, N.C. 28405-3845 • Telephone 910-395-3900 • Fax 910-350-2004
An Equal Opportunity Affirmative Action Employer
TRIPP ENGINEERING, P.C.
419 Chestnut Street
\V/ihnington, North Carolina 28401
Phone: (910) 763-5100 • PA\: (910) 763-5631
March 25, 2004
NCDENR
Division Water Quality
127 Cardinal Drive
Wilmington, NC 28405-3845
Attn: Ms. Laurie Munn
Re: Shallotte Shops
Brunswick County, NC
TE 03128
Dear Laurie:
Enclosed please find two (2) sets of plans, one (1) signed original and one (1)
copy of the application form with narrative, one (1) wet detention basin supplement, two
(2) sets of calculations and one check for the fast track application fee.
Please review for approval and contact us with any questions or comments.
Thank you.
Sincerely,
Tripp Engineering, P.C.
/P.
Michael Hoffer
MBH:dcb
Enc.
\� EIVED
MAH 2 9 2004
-iy
03/25/04
Stormwater Narrative
Shallotte Shops
Brunswick County, NC
TE03128
Shallotte Shops is a 2.04-acre existing vacant tract proposed for a commercial shopping center.
Impervious areas include 19,894 SF of building, 2,707 SF of sidewalk and 41,426 SF of asphalt,
creating a total lot impervious area of 64,027 SF. The total percent impervious is 72.2%.
The project will be treated by wet detention. The detention pond will be designed to meet the
State's F and the County's 10-year pre -post requirement. Outflow from the pond drains to the
Shallotte River, classification SC HQW.
3/25/2004
MBH
Shallotte Shops
Stormwater Calculations
03128-
Total Drainage Area
s . ft.
acres
88,652
2.04
Impervious Area
Land Use
s ,ft.
acres
buildings
19,894
0.46
asphalt
41,426
0.95
concrete
2,707
0.06
Total
64, 027
1:47
Stormwater Calculations:
Time of Concentration
Hydraulic Length (L) = 630 ft.
hange in Height (H) = 4 ft.
Tc = (La /H):` / 128
7.84 min.
Flow for 10 year, 6 hour Storm (Q,o)
QPRe = (CPRE) x (I,) x (Area)
= 3.21 cfs
QPosT = (CPosT) x (Im) x (Area)
= 9.74 cfs
Detention Pond Design:
Pond Size:
Elevation
ft.
Surface Area
(sq. ft.
Normal Pool
31.00
,4,615
Flood Pool
32.10
5,710
Top of Bank
35.00
7,988
Bottom of Pool
26.00
254
Total Provided Storage Volume:
Vol. _ [(Normal pool SA + Flood Pool SA) / 21
x (F.P. elev. - N.P. elev.)
= 5,679 cu. ft.
v
03128-Pond
%impervious = 22
72.
= 72.2%
say 73.0%
CPRE = 025
QPosT = (% imp.)(.95)+(1% imp.)(.25)
0.76
Ito = 6.30 in/hr
,so = 7.79 in/hr
Flow for 50 year, 6 hour Storm (Q50)
QPRE _ (CPRE) x (ho), x (Area)
3.96 cfs
QPosT = (CPosT) x (ho) x (Area)
= 12.05 cfs
State Surface Area Reauirement at normal pool
Pond side slopes = 3 :1
Depth below N.P. = 5 ft.
SA/DA= 0,0514
(Chart for 90% TSS Removal for Wet Detention
Pond without Vegetative Filter
Required SA = (SA/DA) x (Total Drainage Area)
4,557 s . ft.
State Volume Reauirement for Storaqe of first 1" runoff
Rv = .05+.009(Percent Impervious)
= 0.7000056 in/in
Vol. = (Design Rainfall)(Rv)(Drainage Area)
5171 cu,ft,
, Z5
3/25/2004 Shallotte Shops
MBH Stormwater Calculations
Oil 28'
n.
Pond Volume:
Bottom SA = 254 sq. ft.
Normal Pool SA = 4,615 sq. ft.
Vol. _ [(N.P. SA + Bottom SA) / 21 x (N.P. el. -
12,173 cu. ft.
Forebav:
Required Volume
Vol. = 20% of storage volume
= 2,435 cu.ft.
Provided Volume
Bottom SA = 300 sq. ft.
Normal Pool SA = 1,430 sq. ft.
Vol. _ [(N.P. SA + Bottom SA) / 2] x (N.P. el. - Bottom el.)
t,oao cL
3 ft.
Outlet Structure Design:
Flow for 2-day drawdown:
for 1st 1" of Stormwater,
Q = Required Vol. / 172,800 sec. (2-days)
= 0.030 cfs
Required Area of Pipe for 2-dav drawdown
A= Q/ [Cd x SQRT(2 x g x h)]
Cd =
0.6
g =
32.2 ft./sz,
h = (F.P.
elev.- N.P. elev.) /2
=
0.55 ft.
A = 0.0084 sq. ft.
Diameter of Pipe for 2-dav drawdown
DIA. = SQRT[(A x 4) / pi]
= 0.1033 ft.
= 1.24
Use 1.0" orifice
Outlet Structure Check:
Using a 4' x 4' Basin,
Perimeter L = 16 ft.
Q = CIA
C = (% imp.)(.95) + (1% imp.)(.25)
= 0.76
1 = 6.30 in. for a 10 yr. Storm
A = 2.04 Acres
9.74 cfs
Flow for 5-day drawdown:
for 1st 1" of stormwater,
Q = Required Vol. /432,000 sec.(5-days)
0.012 cfs
i area or ripe for o-uay mawuuwn.
= Q/ [Cd x SQRT(2 x g x h)]
Cd = 0.6
g = 32.2 ftJsz
h = (F.P. elev. - N.P. elev.) / 2
= 0.55 ft.
0.0034 sq. ft.
Diameter of Pipe for 5-day drawdown:
SQRT[(A x 4) / pi]
= 0.0653 ft.
= 0.78 in.
Q= CwxLxH
H= [Q/(CwxL)ff
Cw = 3
= 0,35 ft.
Peak elevation = flood pool elevation + H
= 32.45 ft.
03128-Pond 2 of 2
Mar 25'04 11:53a Phillip Tripp 910-763-5631 p.3
O� i1nt�•
TRIPP ENGINEERING, P.C.
419 Chestnut street to / 0
\Vihnington. North Carolina 28401
41 1''hone: (91o) 163-5100 • FAN: (qto) -63-5631
r'a r 3j2
T 3 I z
March 25, 2004
NCDENR
Division Water Quality
127 Cardinal Drive
Wilmington, NC 28405-3845
Attn: Cameron Weaver
Re: Shallotte Shops
Brunswick County, NC
TE 03128
Dear Mr. Weaver:
We are requesting the above referenced project be scheduled for the express
review process (storn"water). Shallotte Shops is a proposed commercial shopping center
of approximately 2 acres. Stonnwater for this high density project will be handled by wet
detention. The Developer is:
Tri-Coast Properties, LLC
Jon T. Vincent, Member Manager
1508 Military Cutoff Road, Suite 302
Wilmington, NC 28403
Phone:256-0101
Fax: 256-0515
our application package will be ready anytime after March 25, 2004. Please
inform us of the time which fits into Laurie's schedule. Thank you.
Sincerely,
Tripp Engineering, P.C.
2 4 -
Della Baird
DCB:dcb
Mar 25'04 11:53a
Phillip Tripp
910-763-5631
p.4
SCALE
NORMAL POOL;
ELEV 31.0