SW8980504_Historical File_19980923

State of North Carolina
A7C11791rAtAi.
Department of Environment
and Natural Resources
Wilmington Regional Office
James B. Hunt,Jr., Governor I '4C D
NR
Wayne McDevitt,�� Secretary NORTH CAROLINA DEPARTMENT OF
Division of`r1 ater Quality ENVIRONMENT AND NATURAL RESOURCES
September 23, 1998
Ms.Betty Williamson,Mayor
Town of Ocean Isle Beach
3 West Third Street
Ocean Isle Beach,NC 28469
Subject: Permit No. SW8 980504
Third and Fourth Street Extension
High Density Stormwater Project
Brunswick County
Dear Ms. Williamson:
The Wilmington Regional Office received the Stormwater Management Permit Application for Third and Fourth Street
Extension on May 28, 1998, with fmal information on July 23, 1998. 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 980504 dated September 23, 1998, for the construction of Third and Fourth Street
Extension.
This permit shall be effective from the date of issuance until September 23,2008, 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 Linda Lewis, or me at(910)
395-3900.
Sincerely,
Rick Shiver
Water Quality Regional Supervisor
RSS/arl: S:\WQSISTOR1viWAT\PERMIT1980504.SEP
cc: Don Covil,P.E.
Delaney Aycock,Brunswick County Inspections
Linda Lewis
Wilmington Regional Office
Central Files
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 980504
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
Town of Ocean Isle Beach
Third and Fourth Street Extension
Brunswick County
FOR THE
construction,operation and maintenance of roadside infiltration swales 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 September 23, 2008 and shall be subject to the following
specified conditions and limitations:
I.DESIGN STANDARDS
1. This permit is effective only with respect to the nature and volume of stormwater described in the application and
other supporting data.
2. This stormwater system has been approved for the management of stormwater runoff as described on page 3 of this
permit,the Project Data Sheet.The stormwater control has been designed to handle the runoff from a total of 72,040
square feet of impervious area.The total includes a future driveway impervious area of 23,040 square feet, based on
a maximum driveway width of 12'. No culverts are allowed within the swales.
3. The swales are designed so that there is no discharge in response to the 1.5" design storm.
4. Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the
permit.
5. The right-of-way will be limited to the amount of built-upon area indicated on page 3 of this permit,and per approved
plans. y //
r e e ),er c , fn -t/T•
2

State Stormwater Management Systems
Permit No. SW8 980504
DIVISION OF WATER QUALITY
PROJECT DESIGN DATA SHEET
Project Name: Third and Fourth Street Extension
Permit Number: SW8 980504
Location: Brunswick County
Applicant: Ms.Betty Williamson, Mayor
Mailing Address: Town of Ocean Isle Beach
3 West Third Street
Ocean Isle Beach,NC 28469
Application Date: May 28, 1998
Water Body Receiving Stormwater Runoff: Eastern Channel
Classification of Water Body: "SA"
Swale Dimensions: 14'wide, 4.5:1 (H:V)side slopes, 1.5' deep minimum
Total Impervious Surfaces,ft2: 7-2;040
2.450 linear feet of 20'wide Road 49,000
Future Driveways, 12r wide maximum: 235040(Based on ninety-six 50'wide lots)
Offsite Area entering Pond,ft2: None,per Engineer
Required Storage Volume,ft3: 9,022(Based on design 1.5" storm)
Provided Storage Volume,ft3: 32,616(Based on full buildout)
14,089(Based on road only,no drives)
Type of Soil: Sand
Expected Infiltration Rate: 20"per hour(1.67 cf./hr/sf)
Seasonal High Water Table Elevation: 6 FMSL
Expected Drawdown Time,hours: 3-6
3

State Stormwater Management Sy'stems
Permit No. SW8 980504
H. SCHEDULE OF COMPLIANCE
1. The storrnwater 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 except roads.
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 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 swales.
g. If the system fails to drawdown within 5 days, the sediment must be removed and the system restored to
design capacity.
4. Records of maintenance activities must be kept and made available upon request to authorized personnel of DWQ.
The records will indicate the date,activity,name of person performing the work and what actions were taken.
5. 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.
6. 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.
7. 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.
8. Prior to the sale of any lots along the project street, the permittee shall inform the lot owner in writing that the
maximum driveway width is 12'and that no culverts are allowed.
10. The permittee is responsible for verifying that the proposed built-upon area does not exceed the allowable built-upon
area.
11. The runoff from all built-upon area on the project must be directed into the permitted stormwater control system.
12. The following items will require a modification to the permit:
a. Any revision to the approved plans,regardless of size.
b. Project name change.
c. Transfer of ownership.
d. Redesign or addition to the approved amount of built-upon area.
e. Further subdivision of the project area.
f. Filling in, altering, or piping of any vegetative conveyance shown on the approved plan.
4

State Stormwater Management Systems
permit No. SW8 980504
13. The Director may determine that other revisions to the project should require a modification to the permit.
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.
M. GENERAL CONDITIONS
1. This permit is not transferable. In the event there is a desire for the facilities to change ownership,or there is a name
change of the Permittee,a formal permit request must be submitted to the Division of Water Quality accompanied
by an application fee,documentation from the parties involved,and other supporting materials as may be appropriate.
The approval of this request will be considered on its merits and may or may not be approved.
2. Failure to abide by the conditions and limitations contained in this permit may subject the Permittee to enforcement
action by the Division of Water Quality, in accordance with North Carolina General Statute 143-215.6A 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.
4. In the event that the facilities fail to perform satisfactorily, including the creation of nuisance conditions, the
Permittee shall take immediate corrective action, including those as may be required by this Division, such as the
construction of additional or replacement stormwater management systems.
5. The permittee grants DENR Staff permission to enter the property 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.
Permit issued this the 23rd day of September.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
1 A.Preston Howard,Jr.,P.E.,Director
Division of Water Quality
By Authority of the Environmental Management Commission
Permit Number SW8 980504
Third and Fourth Street Extension
Stormwater Permit No. SW8 980504
Brunswick County
5

State Stonnwater Management Systems '
Permit No. SW8 980504
Engineer's Certification
1, ,as a duly registered Professional Engineer in the State of North Carolina,
having been authorized to observe(periodically/weekly/full time)the construction of the project,
(Project)
for (Project Owner) hereby state that, to the best of my abilities, due care and
diligence was used in the observation of the project construction such that the construction was observed to be built within
substantial compliance and intent of the approved plans and specifications.
Noted deviations from approved plans and specification:
SEAL
Signature
Registration Number
Date
6

CANT
INFILTRATION SWALE MAINTENANCE
Project Name: Ocean Isle Beach 3rd and 4th Street Extension
Responsible Party Name: Town of Ocean Isle Beach
Agent for Responsible Party: _Betty Williamson, Mayor
Address: Town of Ocean Isle Beach,3 West Third Street, Ocean Isle Beach, NC 28469
Phone No. [phone]
After every runoff producing rainfall event,or at least monthly,whichever occurs first:
1. Inspect the infiltration swales for erosion,trash accumulation, and general condition
of surface.
2. Repair eroded areas immediately,re-seed as necessary, keep side slopes and bottom
mowed, and remove any accumulated trash.
3. Inspect stone dams for structural integrity. Repair as necessary to provide for
storage of 18"of backwater behind(upstream) of stone dams.
4. Check depth of sediment collected behind stone dams every three months. At such
times as the sediment depth is within 12 inches of the overflow of the stone dam,
remove the sediment and restore the swale bottom to the original design grades. At
such times, re-seed as necessary. Use erosion control matting as may be required
for temporary channel and bank stabilization.
1, Betty Williamson, Mayor agree for the Town of Ocean Isle Beach to be
responsible for performing the maintenance items as listed above for this project. The
Town hereby agrees to notify NCDEM of any problems with the system, or changes in the
name of the project,name/of the responsible party, or address.
Signature �!J Date 5 2 b r $

Date Received •• U ",
Fee Paid Permit Mater
- „_►�=2f' I ice. co D>D 2---, 5W 9'21O 504-
S torte of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STCRMWAI hit MANAGEMENT PERMIT APPLICATION FORM
This form may be photocopied for use as an original
I. GENERAL INFORMATION
1. Applicants name(specify the name of the corporation,individual,etc.who owns the project):
Town of Ocean Isle Beach
2. Print Owner/Signing Officials name and title (the person who is legally responsible for the facility and
its compliance):-
f3e4 will; Qin soil 1-4 U--
3. Mailing Address for person listed in item 2 above:
3 West Third Street
Ocean Isle Beach State NC ip: 28469
Telephone Numbec f 910 ) 579-2166
4. Project Name(subdivision,facility,or establishment name-should be consistent with project name on
plans,specifications, letters,operation and maintenance agreements,etc.):
3rd and 4th Street Extension
5. Location of Facility (street address):
ZrrA Sf-raai-
ay: Ocean Isle Beach car Bi-u ck
6. Directions to facility(from nearest major intersection):
Take Ocean Isle Beach Causeway across Intracoastal Waterway and turn right
- on 3rd street_
7. Taffilvim 13° 53' 17" Longitude 26° 40' 00" of facility
8. Contact person who can answer questions about the fact ity:
Nam Alan C. Lewis Telephone Number. ( 910 ) 754-8029
11. PERMIT INFORMATION:
1. Specify whether project is (check one): XIsTew Renewal Modification
2. If this application is being submitted as the result of a renewal or modification to art existing permit,list
the existing pe mi number N/A _ and its issue date(if]mown)
Form SWU-101 April 1998 Page 1 of 4

3. Specify the type of project (check one):
Low Density I High Density Redevelop General Permit y Other,
nubi1?.ram
4. Additional Project Requirements (check applicable blanks): I
C NIA Major x Sedimentation/Erosion Control 404 Permit -
III. PROJECT INFORMATION
1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative
(one to two pages) describing stormwater management for the project.
Infiltration into roadside saa7es constructed in deep sands.
2. Stormwater runoff from this project drains to the Eastern Channel, Old Sound Creiver basin.
3. Total Project Area: 3.5 ac. acres 4. Project Built Upon Area: 31.5
5. How many drainage basins does the project have? 1
6. Complete the following information for each drainage basin. If there are more than two drainage basins in
the project, attach an additional sheet with the information for each basin provided in the same format as
below.
.,Basi. IifQnnt tion .. 1. ; • V/. i . e Basta -. Yw f .. 7.aslit,Z1Ad y
Receiving Stream Name Eastern Ch iiel, Old Sand Creek
Receiving Stream Class SA
Drainage Basin Area 3.5 ac.
•
Existing Impervious*Area 0.00 ac.
Proposed Impervious'Area 1.10 ac.
% Impervious"Area (total) 31.5
Inmernuio `Lha:nage aus �'vrface:�rea •_•-: - •. ._.,...n �Basta 1 � .... '`•�• •:w .. .,. . ::,�. .:...
On-site Buildings 0.00 ac.
On-site Streets 1.10 ac.
On-site Parking .- 0.00 ac.
On-site Sidewalks 0.00 ac. •
Other on-site 0.00 a.
Off-site 0.00 ac.
Total: E= 1.10 ac_ �-
Impervious area is defined as the built upon area including, but not Iimited to, buildings, roads, parking
areas, sidewalks, gravel areas, etc.
7. How was the off-site impervious area listed above derived? N/A
IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
Deed restrictions and protective covenants are required to be recorded for all low density projects and all
subdivisions prior to the sale of any lot. Please see Attachment A for the specific items that must be recorded..
Form SWU-101 April 1998 Page 2 of 4

By your signature below,you certify that the recorded deed restrictions and protective covenants for this project
shall include all the items required by the permit, 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. AGENT AUTHORIZATION _ _
If you wish to designate submittal authority to another individual or firm so that they may provide
information on your behalf,please complete this section:
Designated agent(individual orfimt); Fast mast Ehginearinz Qbmret r. P.A.
mailingAdthEs5 4918 Main Stitel. - P.O. Pox 2869
Cty: Shallottm State IC Zip: 28459
Phone: ( gin ) 7c4.- 79 Fax I 910 1 7S4-8049
VI. SUBMITTAL REQUIREMENTS
This application package will not be accepted by the Division of Water Quality unless all of the applicable
items are included with the submittal
1. Please indicate that you have provided the following required information by signing your initials in the
space provided next to each item.
Applicant's Initials
• Original and one copy of the Stormwater Management Permit Application Form Aar*
• One copy of the applicable Supplement Form(s)for each BMP(see Attachment A) 4&.
• Permit application processing fee(see Attachment A) ,4tc-
• Two copies of plans and specifications including: ems..
• Detailed narrative description of storntwater treatment/management Ad(
• Two copies of plans and specifications,including: A fdam
-Development/Project name -
-'Engineer and firm
. -Legend
-North arrow
• - Scale
-Revision number&date
-Mean high water line
-Dimensioned property/project boundary
•
-Location map with named streets or NCSR numbers
-Original contours,proposed contours,spot elevations,finished floor elevations
-Details of roads,parking,cul-de-sacs,sidewalks,and curb and gutter
-Wetlands delineated,or a note on plans that none exist
-Existing drainage(including off-site),drainage easements,pipe sizes,runoff calculations
- Drainage basins delineated
- Vegetated buffers (where required)
VII. APPLICANTS CERTIFICATION
I,(print or type name of person listed in General Information,item 2) Betty Williamson
certify that the information included on this permit application form is correct, that the project will be
constructed in conformance with the approved plans,that the deed restrictions in accordance with Attachment
A of this form will be recorded with all required permit conditions,and that to the best of my knowledge the
proposed project complies with the req ' of 15A NCAC 2H.1000. //g°If due: A Z— I Dates 5 f
Tim - Mayor a .
Form SWU-101 April 1998 Page 3 of 4

ATTACHMENT A
1. Deed Restriction Language
The following statements must be recorded for all low density projects and for all projects that involve the
subdivision and selling of lots or outparcels:
1. No more than square feet of any lot, including that portion of the right-of-way between the
edge of pavement and the front Iot line, shall be covered by impervious structures including
asphalt, gravel, concrete, brick, stone, slate or similar material but not including wood decking or
the surface of swimming pools. This covenant is intended to insure continued compliance with.the
stormwater permit issued by the State of North Carolina. The covenant may not be changed or
deleted without the consent of the State.
2. No one may fill in, pipe, or alter any roadside swale except as necessary to provide a minimum
driveway crossing.
NOTE: If lot sizes vary significantly,the owner/developer must provide an attachment listing each lot
number,size and the allowable built-upon area for each lot.
For commercial projects that have outparcels or future development the following statements must also be
recorded:
3. The connection from the outparcel or future area into the stormwater system must be made into the
forebay such that short-circuiting of the system does not occur.
4. All built-upon area from the outparcel or future development must be directed into the permitted
stormwater control system.
5. Built-upon area in excess of the permitted amount will require a permit modification prior to
construction.
For curb outlet systems,the following statement in addition to items 1 and 2 above must be recorded:
6. No ore may pipe,fll in or alter any designated 100 foot long grassed swale used to meet the
requirements of NCAC 2H .1008(g).
2. Supplement Forms
The applicable supplement form(s)listed below must be submitted for each BMP specified for this project
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 Nutrient Management Strategy Supplement
3. Permit Application Fees (check made payable to NCDENR and submitted to the appropriate Regional
Office)
Type of Permit New,Modification, or Timely Renewal Without
Late Renewal Modification
Low Density $225 n/a
High Density $385 $225
Other $225 n/a
Directors Certification $350 n/a
• General Permit $50 n/a
Form SWU-101 April 1998 Page 4 of 4

.411IFfy East Coast
IF Engineering Company, P.A. 4918 Main Street
Fax: [phone] Consulting Engineers Post Office Box 2869
Office: 910.754.8029 Shallotte,NC 28459
Tuesday, July 21, 1998
�i MWA Ms. Linda Lewis
Water Quality Section
NC Department of Environment,Health and Natural Resources 1) E C E I V ' 7
127 Cardinal Drive Extension
Wilmington,North Carolina 28405-3845 :11 JUL 2 3 1998 zi
Re: Ocean Isle Beach 3rd and 4th Street Extension D E M
Stormwater Project No. SW8-980504 PROJ #
Revised Plans
Dear Ms. Lewis:
We have performed calculations addressing future driveway connections to the 3rd
and 4th Street Extension as requested in your July 15, 1998 letter to us. Two copies of the
calculations are enclosed. Also enclosed are two copies of Plan Sheet Number 1 which has
been revised to include a note addressing the requirement for a Town ordinance about
future driveway connections.
The calculations demonstrate that the storage capacity of the roadside swales
actually increases due to the presence of more "dams" to maximize the storage elevation.
This net effect is clearly demonstrated from viewing the shaded stormwater storage areas in
the vicinity of stations 3+00 and 6+00 on the profile. Whereas without driveways the
storage in these areas is minimal, with driveways the storage approaches the maximum
amount (i.e., close to 1.5' of storage depth).
Your attention to this matter is appreciated. Please contact us should you have any
further questions about this project.
Sincerel
Alan C is,Vice President
ojec annager
Donald M. Covil, P.E.
Enclosures
pc: Mr. Greg Taylor,Town of Ocean Isle Beach
File: 98-0197 (Ocean Isle Beach 3rd &4th St.)

.. .
STORM WATE
DECEIVE --1
JUL 2 3 1998 J
D E
PROJ #sw� SD4
SUPPLEMENTARY
CALCULATIONS AND NOTES
ADDRESSING THE IMPACT OF
FUTURE DRIVEWAY CONNECTIONS
Ocean Isle Beach 3rd and 4th Street Extension
Stormwater Management Plan
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State of North Carolina
Department of Environment A s
and Natural ResourcesN p
Wilmington Regional Office
Amosimmommok
James B.Hunt,Jr., Governor 1*1 C D E R
N
Wayne McDevitt,Secretary NORTH CARCLINA DEPARTMENT OF
Division of Water Quality ENVIRONMENT AND NATURAL RESOURCES
July 15, 1998
Mr. Don Covil, P.E.
East Coast Engineering
PO Box 2869
Shallotte, NC 28459
Subject: ACKNOWLEDGEMENT OF RECEIPT AND
REQUEST FOR ADDITIONAL INFORMATION
Stormwater Project No. SW8 980504
Third and Fourth Street Extension
Brunswick County
Dear Mr. Covil:
The Wilmington Regional Office received a Stormwater Management Permit Application for Third
and Fourth Street Extension on May 28, 1998. 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. Have you accounted for any future driveways that will be crossing the swales? Infiltration and
storage will be reduced as the lots along the road develop, and piping under driveways takes
the place of the swale. How does the Town plan to restrict driveway widths in this area to
continue providing the minimum storage volume and infiltration area? Please revise your
calculations to reflect the impact of future driveways.
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 August 15, 1998, 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 have any questions concerning this matter please feel free to call me at (910) 395-
3900.
Sincerely,
l G(AA. .
Ms. Linda Lewis
Environmental Engineer
RSS/arl: S:1WQS\STORMWAT\ADDINF01980504.JUL
cc: Linda Lewis
Central Files
127 Cardinal Dr.Ext.,Wilmington,North Carolina 28405 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50%recycled/10%post-consumer paper

sty East Coast
Engineering Company, P.A. 4918 Main Street
Fax: [phone] Consulting Engineers Post Office Box 2869
Office: 910.754.8029E Shallotte,NC 28459
Tuesday, May 26, 1998 _ "'�EI D
MAY 2 8 '1998
Ms. Linda Lewis BY:
Water Quality Section
NC Department of Environment, Health and Natural Resources
127 Cardinal Drive Extension
Wilmington,North Carolina 28405-3845 ' 35-24-Re: Ocean Isle Beach 3rd and 4th Street Extension
Stormwater Plan Submittal
Dear Ms. Lewis:
Please find enclosed the following documents which constitute stormwater
submittal for the subject project:
1. Two copies of stormwater plan Sheets 1 and 2;
2. One original and one copy of the Stormwater Management Application Form;;
3. One original and one copy of the Infiltration Swale Maintenance form;
4. Stormwater calculations; and,
5. Check in the amount of $385 to cover the application fee for the high density
projects.
Your attention to this matter is appreciated. Please contact us should you have any
questions or concerns about this project.
Sincerely,
'4111#
Alan ( wis, Vice President
Project Manager
Q79,/„P"7,7
Donald M. Covil, P.E.
Enclosures
pc: Mr. Greg Taylor,Town of Ocean Isle Beach
File: 98-0197 (Ocean Isle Beach 3rd &4th St.)

CALCULATIONS AND NOTES
Ocean Isle Beach 3rd and 4th Street Extension
Stormwater Management Plan
STORM WATER
RECEIVE5
�`' CI.P..� MAY 2 81998
6(
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SEAL 19* PROJ#
6INE``a
East Coast Engineering Company,P.A,
Shallotte,North Carolina

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3rd ST.EXTENSION-OCEAN ISLE BEACH. NC-SOILS REPORT
A 1 I A I H? I C ' 0 1 E F I G I FI i I.
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• S I OCEAN ISLE BEACH,3RD ST.EXTENSION I I
9 ! DATE: 05/7/98 I 1 I 1 I .
10 I • I )" I 1 PERMEABILITY"1
i 11 STATION !HORIZON: I DEPTH •COLOR I TEXTURE STRUCTURE I E' T/OWT I COMMENTS; incl,e 9P eur
12 14+00 i FIL 10-4 !YELL BROWN ,J SCL W,F.M.SBK ¢t
13 1 Al 14 6 i LT.YELLBROWN S 1W F,GR I I I >20 •
14 I ;CI ;6-100 'LT.GRAY S 'W,F,GR I I L >213 1
15 I C2 i 100-120 PALE BRWN I S/LS ;W,F,GR 110E/120 I LTAR=12 I 15-18 I
17 i I I I � 1 t
18 !
I 19 STATION I HORIZON:!DEPTH COLOR I TEXTURE STRUCTURE I EWT/OWT LCOMMENTSI
i 20 16+00 IA1 10-28 •LT.YELL.BROWN IS W,F,GR 1 I 1 >20
21 !FILL. I26-30 _YELL BROWN I SCLISLTW,F:M,SBK f I I 1-4 I
22 :Cl 130-130 LT.GRAY S 1 W,F,GR ! . LTAR-1.2 i >20 23 _ I C2 • !1330-140 !PALE BRWN I S1LS I W.F,GR 1130/140 T 15-18
•
24 1 I i 1 1 I
25 1 ! I I I I l
28 STATION HORIZON: 'DEPTH COLOR TEXTURE STRUCTURE IEWTJWT !COMMENTS) 1
27 18+00 ;Al • 10-10 LT.YELLBROWN i S ;W,F,GR .. >20 I >20 1
28 I • I I C,3,SHELL I
29 I I Cl • 110-60 I LT.GRAY I S I W,F,GR I >20 .
k 30 JJ C2 ;60-75 PALE BROWN I S :W,F,GR 170/82 i ! 15-18
31 I I2A 175-82 ,BROWN I S 'W,F,GR ; 1 15-18
32 I BORING TERMINATED SUE TO SLOUGH.I
33 1 I I I "
34 J STATION !HORIZON: I DEPTH I COLOR I TEXTURE STRUCTURE EWT/OWT I COMMENTS• (
1 35 120+00 I Al 10-1 I LT.GRAY I S , I W.F,GR >20
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39 I :STG.BROWN SICL I MASS I I 0.1-0,5
40 14CG I 102-120 ;GRAY S 1 W,F,GR f 15-i8
41 I I I I I
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43 22+00 Al 10.4 •BROWN Is !W,F,GR ` 1 >20
44 Cl • 4130 •V.PALE BROWN Is 'W,F,GR I >i0
45 1C2 • 1304140 PALEBRWN S W,F,GR >140i-148 LTAR=12 >20
47 ! I I
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48 ,A fATION 'HORIZON: I DEPTH I COLOR !TEXTURE STRUCTURE EWT/OWT COMMENTS(
49 24+00 I Cl 10-130 ^V.PALE BROWN S ;W,F,GR + >20
50 I C2 1130-140 ;PALE BRWN s. I W,F,GR .1�13 LTAR=1.2 >20
51 I I
! 52 E I ELEV.OF I I
53 O�Tel SEASONAL . I
54 I I I WATER i WATER _
55 I (STATION! ELEVATION(MSL1 I TABLEEIN.)I TABLE(MSL) %GRADIEN i~
58 I I 14+00 ; 13_1 105 , 4.35
I-57 � 1r6+00 1 15.3 . 130 4.47 1 0.06
I 5E i 18+00 I 10.6 I 70 I 4.77 0.15
59 i 20+00 . 14.1 95 6.18 I 0.71
60 II 22+00 14,9 130 I 4.07 -1.06
61 I 24+00 1 13.1 125 : 2.68 -0.69 I
62 . . I I i
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' STORMWATER RUNOFF AND STORAGE VOLUMES FOR ROADWAY SECTIONS
Roadway Water
Section Runoff Storage Storage Volume (cf)
I.D. Volume (cf) Station Depth (ft) Incremental Accumulated
1 970
40 1.10
60 j 1 .10 109 109
80 1.10 109 218
100 I 1.10 109 327
120 1 .10 109 436
140 1 .10 109 545
160 1.10 109 653
180 1 .10 109 762
200 ! 1 .10 109 871
220 1 .20 119 990
240 1 .28 138 1 128
260 I 1.35 155 1284
280 1 .43 173 1457
300 i 1 .50 193 1650
4 g II-4
300 I 0.00
320 i 0.00 0 0
340 j 0.00 0 0
360 i 0.10 0 0
380 0.22 3 3
400 0.33 7 10
420 j 0.45 14 24
440 0.57 24 48
460 0.68 35 83
480 0.80 50 133
500 -
520 1
540 1 .15 108 393
I393
560 1 .27 132 525
580 1 .38 158 683
I 600 1.50 187 871
a 1 t2
600 I 0.10
620 0.21 2 2
640 0.32 7 9
660 0.43 13 22
680 0.56 22 44
700 0.65 33 78
720 0.76 45 123
740 0.87 60 183
760 0.98 77 260
780 1.09 97 357
800 1 .20 118 475
820 1 .26 136 611
840 1 .32 150 761
860 1 .38 164 925
880 1 .44 179 1 104
900 1 .50 195 1299

STORMWATER RUNOFF AND STORAGE VOLUMES FOR ROADWAY SECTIONS
4 _ 114;6
900 0.75
920 0.80 54 54
940 0.85 61 115
960 0.90 69 184
980 0.95 77 261
1000 1 .00 86 347
1020 1.05 95 442
1040 1 .10 104 546
1060 1 .15 114 660
1080 1 .20 124 784
1100 1 .25 135 919
1120 1 .30 146 1065
1 140 1 .35 158 1 224
I 1160 1.40 170 1394
1180 1 .45 183 1577
I 1200 I 1 .50 196 1772
5 11. 5
1200 0.80
1220 0.85 61 61
1240 0.89 68 129
1260 0.94 76 205
1280 0.99 j 84 288
1300 1.03 92 380
1320 1 .08 101 481
1340 1.13 110 590
1360 1 .17 119 710
1380 1 .22 129 838
1400 1 .27 139 978
1420 1 .31 150 1127
1440 1 .36 161 1288
1460 1.41 172 1461
1480 1 .45 184 1645
1500 1 .50 196 1841
6 ti
1500 1 .10
1520 1 .13 112 112
1540 1.15 117 229
1560 1 .18 123 351
1580 1 .21 128 479
1600 1 .23 134 613
1620 1 .26 140 753
1640 1 .29 146 899
_ 1660 _ 1.31 152 1051
1680 1 .34 158 1210
I 1 700 1 .37 165 1374
1 720 1 .39 171 1546
1 740 1 .42 178 1724
1 760 1 .45 185 1909
1780 1 .47 192 2101
1800 1 .50 199 2300

!(.,
STORMWATER RUNOFF AND STORAGE VOLUMES FOR ROADWAY SECTIONS
1800 1 .05
1820 1 .08 102 102
1840 1.11 108 210
1860 1 .14 114 324
1880 1 .17 _ 120 444
1900 1 .20 126 570
1920 I 1.23 133 703
1940 I 1.26 140 I 843
1960 1 .29 146 I 989
1980 I 1 .32 153 1142
2000 I 1 .35 160 1303
2020 1 .38 1 68 1471
2040 I 1.41 175 1 646
2060 1.44 183 I 1829
2080 1 .47 191 2019
2100 1 1 .50 198 2218
15
2100 1 .00
2120 1.03 93 93
2140 I 1 .07 99 192
2160 I 1 .10 106 298
2180 1.13 112 410
2200 I 1.17 119 529 _
2220 1 .20 126 655
2240 ! 1.23 133 I_ 789
2260 i 1.27 141 929
2280 I 1.30 148 1077
2300 1 .33 156 1233
2320 1 .37 164 1398
2340 L 1 .40 172 1570
2360 1 .43 181 1750
2380 1.47 189 1940
2400 1 .50 198 2138
I i
NOTES: 1. Runoff volume is based on 1.5 inches of rainfall on 1/2 of roadway plus
20' of shoulder &swale.
2. Water storage depth is measured from roadway roadway/swale profile
based on backwater stored behind permanent stone check dams.
3. Storage volume is based on water storage depth in a roadside swale with
4.5 (H:V) side slopes. (See Roadway Cross Section.)
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Shallotte, North Carolina

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-C. -

ROADSIDE SWALE Q10 HYDROLOGY&HYDRAULICS
PROGRAM USE Input channel Target Q, Side Slope, Bottom Width, and n. Then very Flow Depth
until computed Q equals Target Q.
PROJECT NAME: Ocean Isle Beach 3rd &4th Street Extension
Designer: DMC
Date: 5/15/98
Swale/Channel I.D. ,; 40-400
COMPUTED Q(CFS)
Target Q (cfs) OS 0.5
Side Slope (H/V) 4.5
Bottom Width (ft) 0
Manning' n 0.�03
Channel Slope (ft/ft) 0.0.013
FLOW DEPTH(FT) 0.43
AVERAGE VELOCITY(FPS) 0.60
Flow Area (st) 0.83205
Wetted Perimeter (ft) 3.964
Hydraulic Radius (ft) 0.210
Swale/Channel I.D. 1.4, #10,00.
COMPUTED Q(CFS)
Target 0 (cfs) 0.3 I 0.3
Side Slope (H/V) 4..;5._
Bottom Width (ft) 0
Manning'n (Lop
Channel Slope (ft/ft) .0.0:050
FLOW DEPTH(FT) 0.27.
AVERAGE VELOCITY(FPS) 0.91
Flow Area (st) 0.32805
Wetted Perimeter (ft) 2.489
Hydraulic Radius (ft) 0.132

Swale/Channel I.D.
COMPUTED Q(CFS)
Target Q (cfs) 019 0.9
Side Slope (H/V) 4.5:
Bottom Width (ft) 0
Manning' n. 0.03
Channel Slope (ft/ft) 0..0057
FLOW DEPTH(FT) 0.40
AVERAGE VELOCITY(FPS) 1.25
Flow Area (sf) 0.72
Wetted Perimeter (ft) 3.688
Hydraulic Radius (ft) 0.195
Swale/Channel I.D. ,:•004
COMPUTED Q(CFS)
Target Q (cfs) 0.6 0.6
Side Slope (H/V) 4.:5
Bottom Width (ft". 0
Manning' n Q..03
Channel Slope (ft/ft) k0O :
FLOW DEPTH(FT) 0.35
AVERAGE VELOCftY(FPS) 1.09
Flow Area (st) 0.55125
Wetted Perimeter (ft) 3.227
Hydraulic Radius (ft) 0.171

Swale/Channel I.D.; . tf] ' 4
COMPUTED Q(CFS)
Target Q (cfs): 0:3 0.3
Side Slope (H/V) 4.5
Bottom Width (ft) 0
Manning'n 0,:03'
Channel Slope (ft/ft) 0,0023
FLOW DEPTH(FT) 0.30.
AVERAGE VELOCITY(FPS) 0.74
Flow Area (st) 0.405
Wetted Perimeter (ft) 2.766
Hydraulic Radius (ft) 0.146
l
Swale/Channel I.D. s# E.. 44
COMPUTED Q(CFS)
Target Q (cfs) 0.9 0.9
Side Slope (H/V) 4,5
Bottom Width (ft) 0
Manning'n 0,03
Channel Slope (ft/ft) micogq
FLOW DEPTH(Fr) 0,47
AVERAGE VELOCITY(FPS) 0.91
Flow Area (st) 0.99405
Wetted Perimeter (ft) 4.333
Hydraulic Radius (ft) 0.229

Swale/Channel I.D.':5 , .I.E S:->tt3t3.
COMPUTED Q(CFS)
Target Q (cfs) 09: 0.9
Side Slope (H/V) 4.5
Bottom Width (ft) 0
Manning'n 0.03.
Channel Slope (ft/ft) 0 00223
FLOW DEPTH(FT) . 0.47
AVERAGE VELOCITY(FPS) 0.91
Flow Area (s0 0.99405
Wetted Perimeter (ft) 4.333
Hydraulic Radius (ft) 0.229
Swale/Channel I.D.;04. 1:600-1ARP
COMPUTED Q(CFS)
Target O (cfs) 0.9 0.9
Side Slope (H/V) 4.5
Bottom Width (ft) 0
Manning' n O,Q;3
Channel Slope (ft/ft)
FLOW DEPTH(FT) 0..52
AVERAGE VELOCITY(FPS) 0.74
Flow Area (st) 1.2168
Wetted Perimeter (ft) 4.794
Hydraulic Radius (ft) 0.254

Swale/Channel I.D. stA. 1>83 *
COMPUTED Q(CFS)
Target Q (cfs) 09 : 0.9
Side Slope (H/V) 4.5
Bottom Width (f 0
Manning' n. 0'.03
Channel Slope (ft/ft) 0,.0013
FLOW DEPTH(Fr) . 0.52
AVERAGE VELOCITY(FPS) 0.74
Flow Area (sl) 1.2168
Wetted Perimeter (ft) 4.794
Hydraulic Radius (ft) 0.254
Swale/Channel I.D.44, 1024
COMPUTED Q(CFS)
Target Q (cfs) c:.9 0.9
Side Slope (H/V)
Bottom Width (ft) 0.
Manning'n 0:_00
Channel Slope (ft/ft) Q.0;0l<3 -;:_
FLOW DEPTH(Fr) 052
AVERAGE VELOCITY(FPS) 0.74
Flow Area (sf) 1.2168
Wetted Perimeter (ft) 4.794
Hydraulic Radius (ft) 0.254

State of North Carolina
Department of Environment
and Natural Resources
Wilmington Regional Office
James
B.HuntMcDevitt,
Jt,S cr tarry NCDENRWayne McDevitt,Secretary
Division of Water Quality NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
May 7, 1998
CERTIFIED MAIL#Z 312 646 301
RETURN RECEIPT REQUESTED
Ms. Betty Williamson, Mayor
Town of Ocean Isle Beach
3 West 3rd Street
Ocean Isle Beach, NC 28469
Subject: REQUEST FOR STORMWATER
MANAGEMENT PERMIT APPLICATION
3rd and 4th Street Extension
Stormwater Project No. SW8 980504
Brunswick County
Dear Honorable Williamson:
On May 4, 1998,the Wilmington Regional Office received a copy of the Notice of Receipt of
Erosion 8f Sedimentatin Control Plan for 3rd and 4th Street Extension. The North Carolina
Administrative Code requires any project that must receive either a Sedimentationr and Erosion Control
Plan permit and/or a CAMA major permit to apply for and receive a Stormwater Management Permit
by the Division of Water Quality. Any construction on the subject site, prior to receipt of the required
permit, will constitute a violation of 15A NCAC 2H.1000 and may result in appropriate enforcement
action by this Office.
Either a Stormwater Permit Application Package including 2 sets of plans, completed
application form,fee, and supporting documentation, or a written response regarding the status of this
project and the expected submittal date must be received in this Office no later than June 7, 1998, or
the subject project file will be closed and construction may experience a subsequent delay. Please
reference the Project Number above on all correspondence. If you have any questions, please call
me at (910)-395-3900.
Sincerely,
eri--76er/v
Linda Lewis
Environmental Engineer
RSS/ar1: S:\WQS\STORIvIWAT\STOR IISUB\980504.May
cc: Delaney Aycock, Brunswick County Inspections
Linda Lewis
Central Files
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 of North Carolina
Department of Environment r
AA
and Natural Resources /
Wilmington Regional Office �j�, J 5,,, '
Division of Land Resources `'7 `
Land Quality Section
Vitiq
James B. Hunt, Jr.. Governor DENR
Wayne McDevitt, Secretary NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
May 1, 1998
NOTICE OF RECEIPT OF EROSION & SEDIMENTATION CONTROL PLAN
Town of Ocean Isle Beach
Ms. Betty Williamson, Mayor
3 West 3rd Street
Ocean Isle Beach NC 28469
Dear Ms. Williamson:
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).
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. Commencement or continuation of a land-disturbing activity under the
jurisdiction of this Act prior to the approval of an erosion and sediment control plan is a violation of the Act.
This land disturbing activity described in this plan is also subject to the Environmental Management
Commission's review of their regulations to implement stormwater controls in coastal counties (15 NCAC 2H
Section .1000). Contact the Water Quality Supervisor of the Division of Environmental Management to ensure
this activity is in conformance with their rules.
If you have questions, 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,
CiutAit.
Carol N. Miller
Environmental Technician
CNM/dbd
cc: Alan C. Lewis, Vice President; Houston and Associates
WiRO-LQS
PROJECT NAME: 3rd and 4th Street Extension
PROJECT NUMBER: 980429BR
LOCATION: 3rd and 4th Streets - Brunswick County
RIVER BASIN: Lumber
SUBMITTED BY: Houston and Associates
DATE RECEIVED BY LQS: April 27, 1998
127 North Cardinal Drive, Wilmington,N.C. 28405-3845 • Telephone [phone]• Fax [phone]
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