SW8991202_HISTORICAL FILE_20000329

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW8 C' o l wz
DOC TYPE
❑ CURRENT PERMIT
❑ APPROVED PLANS
HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
2000 0 3 2 q
YYYYMMDD

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
Mr. David A. Horton, Owner
128 Little Nine Dr.
Morehead City, NC 28557
Dear Mr. Horton:
as
N C D E N
NcR CAROUNA DEPARTMENT OF
ENVIRONMENT MO NA URAL RESOURCES
March 29, 2000
Subject: Permit No. SW8991202
David A. Horton
High Density Subdivision Stormwater Project
Carteret County
The Wilmington Regional Office received a complete Stormwater Management Permit Application for David A. Horton
on March 24, 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 991202,
dated March 29, 2000, for the construction of the project, David A. Horton.
This permit shall be effective from the date of issuance until March 29, 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 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 Scott Vinson, or me at
[phone].
Sincerely,
Rick Shiver
Water Quality Regional Supervisor
RSS/:sav S:\WQS\STORMWAT\PERMIT\991202.MAR
cc: C.T. Clayton
Katrina Marshall, Carteret County Inspections
Scott Vinson
Wilmington Regional Office
Central Fdes
127 Cardinal Dr. Est., Wilmington, North Carolina 28405 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/10% post -consumer paper

State Stormwater Management Systcros
Permit No. SW8 991202
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
David A. Horton, Owner
Carteret County
FOR THE
construction, operation and maintenance of a wet detention pond and a sand 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 March 29, 2010 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 subdivision is permitted for 15 lots, each allowed 80%
of built -upon area, see Attachment A for square footage of built -upon area per lot.
3. Approved plans and specifications for this project are incorporated by reference and are enforceable parts
of the permit.
4. This pond must be operated with a 30' vegetated filter.
2

_ .. State Stormwater Management Systems
Permit No. SW8 991202
DIVISION OF WATER QUALITY
PROJECT DATA SHEET
Project Name:
David A. Horton
Permit Number:
SW8 991202
Location:
Carteret County
Applicant:
Mr. David A. Horton, Owner
Mailing Address:
David A. Horton
128 Little Nine Dr.
Morehead City, NC 28557
Application Date:
March 24, 2000
Name of Receiving Stream / Index #:
Newport River / WOK03 21-(1)
Classification of Water Body:
"C"
If Class SA, chloride sampling results:
n/a
Design Storm:
F,
Pond Depth, feet:
6.00
Permanent Pool Elevation, FMSL:
22.00
Total Impervious Surfaces, ftz:
284,353
15 lots at 80%, ftz:
243,843
Roads/Parking, ftz
40,510
Other, ftz
n/a
Offsite Area entering Pond, ftz:
none, per Engineer
Required Surface Area, ftz:.
11,803
Provided Surface Area, ftz:
12,550
Required Storage Volume, ft3:
23,114
Provided Storage Volume, ft3:
25,527
Temporary Storage Elevation, FMSL:
23.85
Controlling Orifice:
2.00" � pipe
I

State Stormwater Management Systems
Permit No. SW8 991202
DIVISION OF WATER QUALITY
PROJECT DATA SHEET
Project Name:
David A. Horton
Permit Number:
SW8 991202
Location:
Carteret County
Applicant:
Mr. David A. Horton, Owner
Mailing Address:
David A. Horton
128 Little Nine Dr.
Morehead City, NC 28557
Application Date:
March 24, 2000
Name of Receiving Stream / Index #:
Newport River / WOK03 21-(1)
Classification of Water Body:
"C"
If Class SA, chloride sampling results:
n/a
Design Storm:
V
Sand Filter Depth, inches:
22.00
Sand Filter Top Elevation, FMSL:
24.50
Total Impervious Surfaces, ft':
3,700
15 lots at 80%, ft':
n/a
Roads/Parking, ft'
3,700
Other, ft'
n/a
Offsite Area entering Sand Filter, ft':
Required Surface Area, ft':
Provided Surface Area, ft2:
Required Storage Volume, ft':
Provided Storage Volume, ft':
Controlling Orifice:
none, per Engineer
Sediment Chamber Sand
Filter Chamber
30.75
30.75
31.00
31.00
46.12
46.12
46.50
46.50
4.00" � pipe
11

State Stormwater Management Systems
Permit No. SW8 991202
II. SCHEDULE OF COMPLLANCE
No homeowner/lot owner/developer shall fill in, alter, or pipe any drainage feature (such as swales)
shown on the approved plans as part of the stormwater management system without submitting a revision
to the permit and receiving approval from the Division.
2. The permittee is responsible for verifying that the proposed built -upon area does not exceed the allowable
built -upon area. Once the lot transfer is complete, the built -upon area may not be revised without
approval from the Division of Water Quality, and responsibility for meeting the built -upon area limit is
transferred to the individual property owner.
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. The Director may determine that other revisions to the project should require a modification to the permit.
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.
6. 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 except roads.
During construction, erosion shall be kept to a minimum and any eroded areas of the system will be
repaired immediately..,,,
The permittee grants permission to DENR Staff to enter the property for the purposes of inspecting the
project for compliance with the conditions of this permit.
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.
10. Decorative spray fountains will not be allowed in the stormwater treatment system.
11. 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.
12. Prior to transfer of ownership, the pond must be inspected by DWQ personnel, and determined to be in
compliance with all permit conditions. Records of maintenance activities will be required.

State Stormwater Management Systems
Permit No. SW8 991202
13. 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 shall be kept free of erosion. The spreader mechanism shall be kept free of
sediment and trash, and shall evenly distribute the runoff across the width of the filter.
14. 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.
15. Prior to the sale of any lot, deed restrictions must be recorded which limit the built -upon area per lot to
the amount as shown on the Project Data Sheet, per Section I, Part 2. The recorded statements must
follow the form:
a. "The maximum built -upon area per lot is 80% of each lot, see Attachment A for the square
footage of built -upon area per lot. This allotted amount includes any built -upon area constructed
within the lot property boundaries, and that portion of the right-of-way between the front lot line
and the edge of the pavement. Built upon area includes, but is not limited to, structures, asphalt,
concrete, gravel, brick, stone, slate, and coquina, but does not include raised, open wood decking,
or the water surface of swimming pools."
b. "The covenants pertaining to stormwater regulations may not be changed or deleted without
concurrence of the State."
C. "Alteration of the drainage as shown on the approved plan may not take place without the
concurrence of the State."
d. "Lots within CAMA's Area of Environmental Concern may be subject to a reduction in their
allowable built -upon area due to CAMA regulations."
e. "All runoff on the lot must drain into the permitted system. This may be accomplished through
providing roof drain gutters which drain to the street, grading the lot to drain toward the street,
or grading perimeter swales and directing them into the pond or street. Lots that naturally drain
into the system are not required to provide these measures."
16. A copy of the recorded deed restrictions must be submitted to the Division within 30 days of the date of
recording the plat, and prior to selling lots. The recorded copy must bear the signature of the Permittee,
the deed book number and page, and stamp/signature of the Register of Deeds.
0

State Stormwater Management Systems
Permit No. SW8 991202
17. 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.
18. 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.
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 "Name/Ownership Change Form" must be submitted to the
Division of Water Quality accompanied by appropriate documentation from the parties involved, such
as a copy of the deed of trust. Other supporting materials, such as a signed Operation and Maintenance
plan in the case of engineered systems, will also be required. The project must be in good standing with
DWQ. The approval of this request will be considered on its merits and may or may not be approved.
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.
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 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.
6. Permittee grants perm4sion to staff of the DWQ to access the property for the purposes of inspecting the
stormwater facilities during normal business hours.
7. The permittee shall notify the Division of any mailing address changes within 30 days.
Permit issued this the 29th day of March, 2000.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
l� =
Kerr T. Stevens, Director
Division of Water Quality
By Authority of the Environmental Management Commission
Permit Number SW8 991202

State Stormwater Management Systems
Permit No. SW8 991202
David A. Horton
Stormwater Permit No. SW8 991202
Carteret County
Page 1 of 2
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,
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 are a part of this Certification.
Noted deviations from approved plans and specifications:
SEAL
Signature
Registration Number
Date

State Stormwater Management Systems
Permit No. SW8 991202
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 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 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, a forebay, and the vegetated filter.
14. The overall dimensions of the system, as shown on the approved plans, are provided.
cc: NCDENR-DWQ Regional Office
Katrina Marshall, Carteret County Building Inspector

H?r&-&k4If#Mt
Al
Stormwater Management
Built -upon Areas
'
Each Lot
LOT
5Q.FT.
80%
1
18,790
15,032
2
18,148
14,518
3
18,931
15,145
4
17,590
14,072
5
17,488
13,990
6
17,385
13,908
7
21,894
17,515
8
17,368
13,894
10
19,344
15,475
11
20,988
16,790
12
24,219
19,375
13
23,770
19,016
14
27,957
22,366
15
22,699
18,159
16
18,233
14,586
243,843
Average
lot impervious
16,256.21
Q
URMWATER
E C E I V ED
IUnlil DEC,O 1 t999
PROJ d Dw��
David A. Horton 01126/2000

s.2;.?,i?.rz�rri:OF?F,ICEi
USE '"ON LY,� T rrz�«,�.n.��';'`�;`;��'�v..
Date Received
Fee Paid
Permit Number
a
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
I. GENERAL INFORMATION
1. Applicants name (specify the name of the corporation, individual, etc. who owns the project):
David A. Horton
2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
David A. Horton
3. Mailing Address for person listed in item 2 above:
128 Little.'Nine,Dr',
City:
Telephone Number:
252 1 444-13
State: NC Zip: 28557
4. Project Name (subdivision, facility, or establishment none - should be consistent with project name on
plans, specifications, letters, operation and maintenance agreements, etc.):
David A. Horton
5. Location of Project (street address):
Little Nine Dr.
City: Morehead City County: Carteret
6. Directions to project (from nearest major intersection):
At intersection of U.S. Hwy 70 & NC Hwy 24, head west toward
Newport. Little Nine Drive will be on the left.
7. Latitude: 3 4 ° 4 4 ' 21 " Longitude: 7 6 ° 4 8 ' 3 6 " of project
8. Contact person who, can answer questions about the project:
Name: David A. Horton Telephone Number: ( 252 1 444-1355
it. 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 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):
CAMAMajor XSedmentation/Erosion Control _404/401Permit Nl'DESStormwater
Information on require, state permits can be obtained by contacting the Customer Service Center at
1-877-623-6748.
III. PROJECT INFORMATION
1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative
(one to two pages) describing stormwater management for the project.
Stormwater from site shall go through drainage: -structures.
Then into a forebay of a stormwater pond. It will be discharge
through a decant orifice structure into a 30' vegetaged filter.
2. Stormwater runoff from this project drains to the Newport River basin.
3. Total Project Area: 9.41 acres
5. How many drainage areas does the project have?_
4. Project Built Upon Area: 70 %
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.
BasmInformation , -� Tut.
Drama e Area.1
..,,.. .g... .. ., "U�
Dramage Area?2
Receiving Stream Name
Newport River
Newport River
Receiving Stream Class
C
C
Drainage Area
'9-.27 Acres
0.27 Acres
Existing Impervious* Area
0
0
Propose Im ervious"Area
6.56 Acres
0.085
% Impervious* Area (total)
69.71
62
Im
Rfl> •
erviousa,Surface,Area
Drama e°Anaxl v
ag Y
w
Dramage°Area2
...........
On -site Buildings
.69 Acres
0 Acres
On -site Streets
.93 Acres
.085 Acres
On -site Parking
4.94 Acres
Acres
On -site Sidewalks
Other on -site
Off -site
Total: 6.56 Acres
Total: 0.085 Acres
" 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

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 SW8 991 202 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 See CAI c chL quare 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 nunageinent permit modification prior to
constriction.
5. All permitted r noff from outparcels or future development shall be directed into the permitted stormwater control
system. These connections to the stormwater control system stall 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 allthe 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 subnutted 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 SW U4106
Off -Site System Supplement
Form SWIM&
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.
Please indicate that you have provided the following required information by initialing in the space
provided next to each item.
• 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 & 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, piease complete this section.
Designated agent (individual or
Mailing Address:
City:_
Phone: ('
VIII. APPLICANT'S CERTIFICATION
State:
Fax: ( I)
I, (print or type name of person listed in General Information, item 2) DIMI 16 (A 1 0 ` -1 O r
certify that the information included on this permit application form is, to the best of my knowledge, correct and
that the project will be constructed in conformance with the approved plans, that the required deed restrictions
and protective covenants will be recorded, and that the proposed project complies with the requirements of 15A
NCAC 21-1.1000.
Date: 07—/_ 00
Form SWU-10I Version 3.99 Page 4 of 4

ii'l!/f71011i P E
C.T. Clayton, Professional Engineer
STORNA L
Scott Vinson IU1 E C E 1, V E D March 23, 2000
Environmental Engineer W n7,44..
127 Cardinal Dr. Ext. Z 4 2M
Wilmington, NC 28405
910 395-3900 DWQ
PROD 0
Stormwater Project No. SW8 991202
Dear Mr. Vinson:
In response to your letter dated March 16, 2000 on the Stormwater Plan for David A.
Horton, we have the following response to your comments and are enclosing a set of
plans and documents for your final review.
1) As stated in the March 1, 2000 letter, by giving the pond system a two foot
deep channel between the forebay and the main pond there is less area being
created at the design depth of 6 feet then is allowed. The vast majority of
the entire pond must be at the design depth, in this case 6 foot deep. In
order to help meet the 3:1 requirement as well as volume and surface area
requirements, replace the channel with a wooden baffle stretched out across
the pond and relocate the outlet structure to the other corner of the pond.
A sketched drawing is included to help with conception.
Response: See sheet 1 and 2 of plans for pond layout.
2) Please provide a new drainage map showing the two separate runoff drainage
areas.
Response: See sheet 1 of plans.
3) Provide calculations for the sand filter design showing that the volume,
surface area, and orifice/draw down time requirements have been met. Include
P.E. seal and signature
Response: See attached calculations.
4) Write out and sign on a separate sheet of paper the Operation & Maintenance
agreement for the sand filter. This 0&M must be signed, dated, and notarized
just like the O&M for the detention pond.
Response: Modified Stormwater Maintenance Plan to include sand filter.
5) Please provide grading
or other structure around the sand
filter
to prevent
other runoff from entering
the device. The grading given
for Lot
13, beside
the sand filter, shows
the potential for off -site runoff
entering
the sand
filter.
Phone: [phone]
2807 NEUSE BLVD., BLDG. 5
Mobile:
252 671-6979
Fax: [phone]
NEW BERN, NC 28562
Home:
910 897-0660

Response: Added curbing on south & west side to prevent off -site drainage into
the sand filter.
6) Please revise sheet 2 of 4 of the application to show the two drainage areas.
For example the pond would be Drainage Area 1, and the sand filter would be
Drainage Area 2. I am also including page 1 of 4 of the detention pond
supplement form so that corrections can be made if needed.
Response: Modified applications forms.
Please review this submittal and should you have questions or comments please
advise.
Sincerely,
C.T. Clayton, P.E.
...
cc: David A. Horton
Brad L. Suitt
file
Phone: [phone] SW8 991202 Mobile: [phone]
Fax: [phone] of 2 Home: 910 897-0660

Phone: [phone]
[e-mail]
Sand Filter Calculations
Total Area
Proposed Building Area
Proposed Roadway/Drainage Area
Green Area
Sediment Chamber
Volume Required
Surface Area Required
Chamber Provided
Height
Width
Depth
Volume
Surface Area
Sand Filter Chamber
Volume Required
Surface Area Required
Chamber Provided
Height
Width
Depth
Volume
Surface Area
Outlet
.T.Clayton, RE�b {/ Fax: [phone]
C.T. Clayton, Professional Engineer
Units Symbols & Goveming Equations
0.138 ac
TA
0.000 ac
BA
0.085 ac
PA
0.052 ac
GA
46.116 ft' V= 540 ft3 /acre drainage area
30.744 ft2 SA= 360 ftZ /acre
1.500 ft
31.000 ft
1.000 ft
46.500 ft'
31.000 ft'
46.116 ft' V= 540 ft' /acre drainage area
30.744 ftZ SA= 360 ftZ /acre
1.500 ft
31.000 ft
1.000 ft
46.500 ft'
31.000 ft'
Area (24 hour drawdown) 0.00876134 sq in A1=(Q/Cd)/(2gh)4.5
where Q=V/time, Cd = 0.60, h=DSD/2
time=86400 seconds (24 hours)
Diameter of Orifice (24 hour drawdown) 0.10561859 in D1=2"(A1/PI)^.5
Final Orifice Diameter 4.00 in Hole = 1
Orifice Flow
Outlet Time
0.29711635 cfs
17.8269813 cfm
1069.61888 cfh
25670.853 cf day
0.00181139 days
Q=CdA'(2gh)^.5
3� a;�_oo
Job no. Cad1352 Stormwater Management Revised 03/22/2000

Ter Soott Vinson
>o Cloytv�, PE
zeoT r¢usc e�w., e�oo. s
Nei BEPN, NG 1e6rE
From: dee
Cornpony Nana: Wilmington Regional Office � aj 6 3 3 - 3— 7 77
Fan 910 350.2004 Pagard, including this
Phone: fiats: March 21,2000
Re: Stormwater Pro]. No. SWtl 991202 CC:
O For Review X Pismo Convent
o Comnoats: David Horton Project.
❑ Hard Copy to Fellow ❑ This is your Original
Just wanted to make sure this is everything that you will be requiring.
Thanks
dee , �oe,
Phone: [phone] uob1le: 252 671.6979 Home: 910 697-0660 Fax: [phone]
Email: [e-mail]

5TORMWATER MAINTENANCE FLAN
for
DAVID A. HORTON
COMMERCIAL PARK
Morehead Township Carteret County
North Carolina
Im
3, - oo
Revised March 20, 2000

TABLE of CONTENTS
Narrative....................................................................................................................................................................... 3
5tormwater Pond Maintenance Plan .................
5and Filter Maintenance Plan
....................................................................... 5
.............................................. I ....... I................ 7
-2-

NARRATIVE
Project Description
The purpose of the project is to construct a stormwater retention pond and to construct a sand filter to
serve 9.41 acre Commercial Park. The project is in Morehead Township, Carteret County, North Carolina and is
being developed by David A. Horton.
The work proposed will include excavation of the stormwater retention pond for the Commercial Park, and
construction of a sand filter and its on site storm drainage system.
5ite_12escription
See Plan.
Adjacent -Property
Land use in the vicinity is commercial and residential. The property to the southeast is owned by David A.
Horton, all other properties adjoining are owned by others, and will not be affected by the work.
Panned_Erosion_and_Sedimentation Control_P_ractices
A temporary gravel construction entrance/exit will be installed at the east project entrance. During wet
weather it may be necessary to wash vehicle tires at this location. The entrance will be graded so that
runoff water will be directed away from proposed roadway.
As soon as final grade is reached on the proposed roadway, the subgrade will be stabilized with a 6-inch
course of NC DOT standard size ABC stone to prevent erosion and dust during the construction prior to
paving.
51opes will be lightly roughened by disking just prior to vegetating. Surface stabilization will be accomplished
with vegetation and mulch as specified in the vegetation plan. Roadway base courses will be installed as soon
as finished grade is reached. Dust control is not expected to be a problem due to the small area of exposure.
Should excessive dust be generated, it will be controlled by sprinkling with water.
5oils
The project site soils consists mainly of sand, silt and clay.
General
The stormwater collection system described will provide the following methods for control of sediments and
for removal of pollutants from the developed site runoff.
-3-

5tormwater_Pond
Collection of all runoff from the site during development of the stormwater retention pond with
controlled discharge.
2. Retention of the first one (1) inch of rainfall of runoff on the roadway and proposed parking and
building areas into the stormwater retention pond. This runoff will drain over a 2 to 5 day
period into the grass -lined Swale before draining into an existing Swale.
3. The retention time for the pond are set at 2.88 days with a total outfall of 8592 of/day from
a 2 inch diameter orifice.
4. The stormwater runoff in excess of the first one (1) inch of rainfall will discharge from the
stormwater retention pond into a decant orifice structure. The storm pool elevation is set at
23.85' ABV M51- with an additional 11' emergency discharge, at elevation 24.0' adjacent to the
existing ditch, as shown on the plan.
5. The project site to be served by the stormwater retention pond and a sand filter (below) as
shown on the "5tormwater Management Plan of David A. Horton".
0. No 404 wetlands have been determined to be on this site.
7. 5eeding specifications shall be as specified in the approved Erosion and Sedimentation
Control Plan.
5andLFitter.
Collection of all runoff from the site during development of the sand filter with controlled
discharge.
2. 5and filters work by receiving the first flush of runoff and settling out the heavier sediment in
the sediment chamber. Water then flows to, and is spread over the sand bed where pollutants
are either trapped or strained out.
3. The retention time for the pond is set at 24 hours with a total outfall of 8592 cf/hr from a 4
inch diameter orifice.
-4-

MAINTENANCE PLAN
5tormwater Pond
The Owner shall maintain the pond during the construction phase of the project and after construction is
completed for all routine and non -routine maintenance tasks. The Owner shall also be responsible for the
perpetual care of the stormwater retention pond.
Conatruction_P_hase
All erosion and sediment control practices shall be checked for stability and proper operation following every
runoff producing rainfall and in no case less than once every week during construction. All repairs shall be
made immediately and shall be in accordance with the approved Erosion and 5edimentation Control Plan.
The stormwater retention pond shall be inspected during the construction phase of the project following every
runoff producing rainfall and in no case less than once a week. Check the embankment, spillway, outlet, and
Swale for erosion damage, and inspect the embankment also for piping and settlement. Make all necessary
repairs immediately. Remove all trash and other debris from around the decant orifice structure and from
around the pool area. Periodic inspection of the discharge orifice shall assure that the system is not
clogged. The retention pond shall be inspected for a build-up of sediment. If and when the sediment layer
exceeds 18 inches thick on the average above the design grade, then this sediment shall be removed. At the
close of the construction phase of the project, the pond shall be cleaned of excess sediment to the designed
grade and begin functioning as stormwater retention pond. All regrading or repairing of the side slopes,
seeding, mowing and any and all repairs shall be performed prior to close-out of the construction phase.
The grass -lined Swale from pond overflow structure shall be properly inspected and maintained against
erosion, weeds, and woody vegetation. All seeded areas shall be maintained to sustain the required
vegetation. Any and all bare areas shall be replanted as necessary, with all repairs made immediately.
Ma ntenance_Requirements
Owner shall be responsible for all routine and non -routine requirements associated with the maintenance of
the stormwater retention pond.
Upon completion of earth disturbing activities and for 12 months following completion of the work, the owner
shall inspect the site following every runoff producing rainfall. A written log shall be maintained of any needed
repairs noted at the inspection, the name of the Contractor completing the repairs, and the date such
repairs are completed.
Routine -Maintenance
1. Mowing. The side -slopes, embankment, buffer area, areas within the fence, areas adjacent to the
emergency spillways and the grass -lined swales shall be mowed at least once a month during the main
growing season and at least two other times during the year to prevent woody growth and to control
weeds. Grass shall be mowed to a "meadow -like" condition and shall be maintained according to
5ection 6.11 Permanent 5eeding of the approved Erosion and 5edimentation Control Plan.
-5-

2. Inspections, The stormwater retention pond shall be inspected (at a minimum of) on an annual
basis to ensure that the structure operates in the manner originally intended. Additional
inspections shall be conducted during wet weather, or times of extreme weather to determine if
each pond is functioning properly. Inspection priorities shall include (but not limited to) the
following: checking the embankment for any erosion, subsidence, cracking, bare areas in the grass,
and tree growth; the condition of the emergency spillway and adjacent ditch; the fence and adjacent
planting buffers; the accumulation of sediment; clogging of the decant orifice structure; the
adequacy of upstream and downstream channel erosion protection measures including any
modifications which have occurred to the contributing watershed, and the pond structure including
the stability of the side slopes. Inspections shall be carried out with "As -Built" retention pond
plans
3. Debria_and_Litter-Fcmovat. Debris and litter removal from the surface of the pond shall be included
as a part of the periodic mowing operation. Particular attention shall be paid to any floating debris
around the decant orifice structure, and the structure shall be checked for possible clogging. Any
trash found within the area of the pond, ditch, and fence shall be removed and disposed of properly
according the County regulations.
4. ErosiorLControl. Corrective measures and repairs shall be done to the pond side slopes,
embankment, emergency spillway and grass lined Swale where settlement, slumping, and erosion has
occurred. Repair ac necessary. Repair or replace the riprap protecting the channel near the outlet
as required to stop the erosion. All repairs shall be done in accordance with the original plans and
specifications.
5. Nuisance�-Control. Owner shall maintain the retention pond and adjacent areas so as to control the
possible problems of weeds, odors, algae, and insects. Proper maintenance shall take care of most
problems except in times of extreme dry weather. Owner shall also use biological control against
mosquito's and algae through the use of fish and fat head minnows when possible in lieu of chemical
applications.
Non-routina-Maintenance
1. 5tructure_Repairr2-and_Replacement. Owner shall replace all deteriorated inlet/outlet works and
decant orifice structure when deterioration from use and age causes them to fail and function
properly. Owner shall be responsible for Al costs incurred with their replacement. Replacement shall
be in accordance with original plans and specifications.
2. 5ediment-Removal. Owner shall be responsible for the removal of excess accumulated sediment in the
pond when the storage capacity is significantly reduced from the design capacity due to the properly
designed and functioning stormwater retention pond. Owner shall be responsible for all incurred costs
of removal and proper disposal of the sediment in accordance with all local, state, and federal
regulations. Sediment removal/clean out cycle for stormwater retention pond is recommended on a
ten to twenty year cycle. Owner shall every five (5) years measure the depth of sediment above design
grade to determine rate of accumulation and to establish a time line for sediment removal.
0

MAINTENANCE PLAN
Sand Filter
The Owner shall maintain the sand filter during the construction phase of the project and after construction
is completed for all routine and non -routine maintenance tasks. The Owner shall also be responsible for the
perpetual care of the 5and Filter.
Construction-Ehase
All erosion and sediment control practices shall be checked for stability and proper operation following every
runoff producing rainfall and in no case less than once every week during construction. All repairs shall be
made immediately and shall be in accordance with the approved Erosion and Sedimentation Control Plan.
The sand filter shall be inspected during the construction phase of the project following every runoff producing
rainfall and in no case less than once a week. Check the Sediment Chamber, 5and Filter Chamber, weir
spillways, outlet, and Swale for erosion damage. Make all necessary repairs immediately. Remove all trash
and other debris. Periodic inspection of the discharge orifice shall assure that the system is not clogged. The
5ediment Chamber shall be inspected for a build-up of sediment. At the close of the construction phase of
the project, the sediment chamber shall be cleaned of excess sediment.
Ma i ntenan c e_Requirement,o
Owner shall be responsible for all routine and non -routine requirements associated with the maintenance of
the 5and Filter.
Upon completion of earth disturbing activities and for 12 months following completion of the work, the owner
shall inspect the site following every runoff producing rainfall. A written log shall be maintained of any needed
repairs noted at the inspection, the name of the Contractor completing the repairs, and the date such
repairs are completed.
Routine Maintenance
Regular maintenance is essential to the long-term performance and durability of the sand filter, as it is with
all stormwater BMPs. At least once a year the filter must be inspected after a storm to determine if the
filter bed is passing the runoff ac expected. Depending mostly on the activities occurring in the drainage
area, most filters will show some decreased capacity for filtration after a few years. Maintenance operations
must be performed when storms of approximately one inch are not passing through the filter within 24 hours.
Maintenance for sand filters consists of removing the first two or three inches of discolored sand, and
replacing this with new sand. The sand that has been removed would then be dewatered, if necessary, and
then landfilled. At the same time that maintenance is performed on the sand chamber, the sediment
chamber should also be pumped and cleaned. It is most likely that the sediment removed from the first
chamber will need to be dewatered before it will be accepted at a landfill.
-7-

I acknowledge and agree by my Signature below that I am responsible for the performance of the maintenance
procedures listed above. 1 agree to notify DWQ of any problems with the system or prior to any changes to
the system or responsible party.
�. mejumsene z •,
Title:
Address:
Phone:
5ignat
Date: 3 `2Z— ©0
I,. v%��'`��/� / /✓/�%l% a Notary Public for the 5tate'off /, m lwl-1
County of �� do hereby certify t t
Personally appeared before me this A6d day of and acknowledge the
Due execution of the forgoing 5tormwater Maintenance Plan requirements. Witness my hand and official Seal,
SEAL
My commission expires
-8-

5TORMWATER MAINTENANCE PLAN
for
DAVID A. HORTON
COMMERCIAL PARK
Morehead Township Carteret County
North Carolina
Revired M®rrh 20, 2000
-I-

TABLE of CONTENT5
Narrative
3
Stormwater Pond Maintenance Plan......................................................................................................................... 5
Sand Filter Maintenance Plan
-7-

NARRATIVE
The purpose of the project Is to construct a stormwater retention pond and to construct a Band filter to
serve 9.41 acre Commercial Paric. The project is In Morehead Township, Carteret County, North Carolina and is
being developed by David A. Horton.
The work proposed will Include excavatlon of the stormwater retention pond for the Commercial Park, and
construction of a sand filter and Its on site storm drainage system,
See Plan,
Land use In the vicinity Is commercial and reeidential. The property to the southeast is owned by David A.
Horton, all other properties adjoining are owned by others, and will not be affected by the work.
A temporary gravel construction entrance/exit will be Installed at the east project entrance. During wet
weather It may be necessary to wash vehicle tires at this location. The entrance will be graded so that
runoff water will be directed away from proposed roadway.
As soon as final grade Is reached on the proposed roadway, the subgrade will be stabilized with a 6-inch
course of NG DOT standard size AM stone to prevent erosion and dust during the conetruavon prior to
paving.
Slopes will be lightly roughened by disking just prior to vegetating. Surface stabilization will be accomplished
with vegetation and mulch as specified in the vegetation plan. Roadway base courses will be installed as Boon
as finlshed grade Is reached. Duet control is not expected to be a problem due to the small area of exposure.
Should excessive dust be generated, It will be controlled by sprinkling with water.
The project site soils consists mainly of sand, alit and clay.
The stormwater collection eyetem described will provide the following methods for control of sediments and
for removal of pollutants from the developed site runoff.
-'A-

1. Collection of all runoff from the site during development of the stormwater retention pond with
controlled discharge.
2. Retention of the first one (1) inch of rainfall of runoff on the roadway and proposed parking and
building areas into the stormwater retention pond. This runoff will drain over a 2 to 5 day
period into the grass -lined Swale before draining into an existing swale.
3. The retention time for the pond are set at 2.65 days with a total outfall of 8592 cf/day from
a 2 Inch diameter orifice.
4. The stormwater runoff in excess of the first one (1) inch of rainfall will discharge from the
stormwater retention pond into a decant orifice structure. The storm pool elevation is set at
23.85' ABV M51. wlth an additional 11' emergency discharge, at elevation 24,0' adjacent to the
existing ditch, as shown on the plan.
5. The project site to be served by the stormwater retention pond and a sand filter (below) as
shown on the "Stormwoter Management Plan of David A. Horton".
6. No 404 wetlands have been determined to be on this site.
7. seeding specifications shall be as specified in the approved Eroclon and Sedimentation
Control Plan.
1. Collection of all runoff from the site during development of the sand filter with controlled
discharge.
2. Sand filters work by receiving the first flush of runoff and settling out the heavier sediment in
the sediment chamber. Water then flows to, and is spread overthe sand bed where pollutants
are either trapped or strained out.
3. The retention time for the pond is set at less than 24 hours with a total outfall of 940 cf/hr
from a 4 inch diameter orifice.
-4-

MAINTENANCE PLAN
5tormwater Pond
The Owner shall malntain the pond during the construction phase of the project and after construction is
completed for all routine and non -routine maintenance tasks. The Owner shall also be responsible for the
perpetual care of the atormwater retention pond.
All erosion and 6MIment control practices shall be checked for stability and proper operation following every
runoff producing rainfall and In no case less than once every week during construction. All repairs shall be
made Immediately and shall be In accordance with the approved Erosion and Sedimentation Control Plan.
The etormwater retention pond shall be Inspected during the construction phase of the project following every
runoff producing rainfall and in no case less than once a week. Check the embankment, spillway, outlet, and
ewale for erosion damage, and inspect the embankment also for piping and settlement. Make all necessary
repairs immediately, Remove all trash and other debris from around the decant orifice structure and from
around the pool area. Periodic inspection of the discharge orifice shall assure that the system is not
ciogged. The retention pond shall be Inepected for a build-up of sediment. If and when the sediment layer
exceeds 18 Inches thick on the average above the design grade, then this sediment shall be removed. At the
close of the construction phase of the project, the pond shall be cleaned of excess sediment to the designed
grade and begin functioning as storrnwater retention pond. All regrading or repairing of the side slopes,
seeding, mowing and any and all repairs shall be performed prior to close-out of the construction phase.
The grass -lined Swale from pond overflow structure shall be properly inspected and maintained against
erosion, weeds, and woody vegetation. All seeded areas shall be maintained to sustain the required
vegetation. Any and all bare areas shall be replanted as necessary, with all repairs made Immediately.
Owner shall be responsible for all routine and non -routine requirements associated with the maintenance of
The stormwater retention pond.
Upon completion of earth disturbing activities and for 12 months following completion of the work, the owner
shall inspect the site following every runoff producing rainfall. A written log shall be maintained of any needed
repairs noted at the Inspection, the name of the Contractor completing the repairs, and the date such
repairs are completed.
1. Mo_Mng. The alde-slopes, embankment, buffer area, areas within the fence, areas adjacent to the
emergency spillways and the grass -lined awales shall be mowed at least once a month during the main
growing season and at least two other times during the year to prevent woody growth and to control
weede. Grass shall be mowed to a "meadow -like' condition and shall be maintained according to
5ection 6.11 Permanent Seeding of the approved Erosion and Seellmentation Control Plan.
-5-

2. InsoT ions. The etormwater retention pond shall be Inspected (at a minlmum of) on an annual
basis to ensure that the structure operates in the manner originally intended. Additional
Inspections shall be conducted during wet weather, or times of extreme weather to determine if
each pond is functioning properly. inspection priorities shall include (but not limited to) the
following: checking the embankment for any erosion, subeldence, cracking, bare areas in the grass,
and tree growth; the condltlon of the emergency spillway and adjacent ditch; the fence and adjacent
planting buffers; the accumulation of sediment; clogging of the decant orifice structure; the
adequacy of upetream and downstream channel erosion protectlon measures Including any
modifications which have occurred to the contributing watershed, and the pond structure including
the stability of the side elopee. Inspections shall be carried out with "As -Built" retention pond
plane
3. pshriFs amid LiZrAr Removal. Debris and litter removal from the surface of the pond shall be Included
as a part of the perlodic mowing operation. Particular attention shall be, paid to any floating debris
Around the decant orifice structure, and the structure shall be checked for possible clogging. Any
trash found within the area of the pond, ditch, and fence shall be removed and dleposcd of properly
according the County regulations.
4. Froslon_.LantcQL Corrective measures and repairs shall be done to the pond side slopes,
embankment, emergency spillway and grass limed Swale where settlement, slumping, and erosion has
occurred. Repair as necessary. Repair or replace the riprap protecting the channel near the outlet
as required to stop the erosion. All repairs shall be done In accordance with the original plane and
specifications.
5. Nul�nce Control. Owner shall maintain the retention pond and adjacent areas so as to control the
possible problems of weeds, odors, algae, and Insects. Proper maintenance shall take care of most
problems except in times of extreme dry weather. Owner shall also use biological control against
mosquito's and algae through the use of fish and fat head minnows when possible in lieu of chemical
applications.
1. 5tructure gepairs and Replacement Owner shall replace all deteriorated Inletloutlet works and
decant orifice structure when deterioration from use and age causes them to fall and function
properly. Owner shall be responsible for all costs Incurred with their replacement. Replacement shall
be In accordance with original plane and specifications.
2. Sediment Removal. Owner shall be responsible for the removal of excess accumulated sediment in the
pond when the storage capacity le eignlflcantly reduced from the design capacity due to the properly
designed and functioning stormwater retention pond. Owner shall be responsible for all Incurred costs
of removal and proper disposal of the sediment in accordance with all local, state, and federal
regulations. 5edlment removal/clean out cycle for etormwater retentlon pond Is recommended on a
ten to twenty year cycle. Owner shall every five (5) years measure the depth of eediment above design
grade to determine rate of accumulation and to establish a time line for sediment removal.
_r.

MAINTENANCE PLAN
Sand Filter
The Owner shall maintain the sand filter during the construction phase of the project and after construction
is completed for all routine and non -routine maintenance tasks. The Owner shall also be responsible for the
perpetual taro of the Sand Filter.
All erosion and sediment control practices shall be checked for stability and proper operation following every
runoff producing rainfall and in no case lose than once every week during construction. All repairs shall be
made immedlateb and shall be in accordance with the approved Erosion and 5edlmentotion Control Plan.
The sand filter shall be Inspected during the construction phase of the project following every runoff producing
rainfall and in no case lees than once a week. Check the Sediment Chamber, Sand Filter Chamber, weir
spillways, outlet, and swale for erosion damage. Make all necessary repairs Immediately. Remove all trash
and other debris. Periodic Inspection of the discharge orifice shall assure that the system Is not clogged. The
Sediment Chamber shall be Inspected for a build-up of sediment. At the close of the construction phase of
the project, the sediment chamber shall be cleaned of excess sediment.
Owner shall be responsible for all routine and non -routine requirements associated with the malntenance of
The Sand Filter.
Upon completion of earth disturbing activities and for 12 months following completion of the work, the owner
shall inspect the site following every runoff producing rainfall. A written log shall be maintained of any needed
repairs noted at the Inspection, the name of the Contractor completing the repairs, and the date such
repairs are completed.
Regular maintenance Is essential to the long-term performance and durability of the sand filter, as it Is with
all stormwater 13MPs. At least once a year the filter must be Inspected after a storm to determine If the
filter bed is passing the runoff as expected. Depending mostly on the activltles occurring in the drainage
area, most filters will show some decreased capacity for filtration after a few years. Maintenance operations
must be performed when storms of approximately one Inch are not passing through the filter within 24 hours.
Maintenance for sand filters consists of removing the fires two or three Inches of discolored sand, and
replacing this with new sand. The sand that has been removed would then be, dewatered, If necessary, and
then landfilled. At the same time that maintenance Is performed on the sand chamber, the sediment
chamber should also be pumped and cleaned. It Is most Ilkely that the sediment removed from the first
chamber will need to be dewatered before It will be accepted at a landfill.
.7.

Phone: 252 672•0304
[e-mail]
Sand Filter Calculations
Total Area
Proposed Building Area
Proposed Roadway/Drainage Area
Green Area
Sediment Chamber
Volume Required
Surface Area Required
Chamber Provided
Height
Width
Depth
Volume
Surface Area
Sand Filter Chamber
Volume Required
Surface Area Required
Chamber Provided
Height
Width
Depth
Volume
Surface Area
Met
Area (24 hour drawdown)
C• ` •Clayton, RE Mob
Fax: [phone]
C.T. Clayton, Professional Engineer
units S1m3bol$ & Govemina Eauadorm
0.138 ac Cd TA
0,000 ac BA
0.085 ac PA
0.052 ac GA
46.116 ft3 V= 540 ft3 /acre drainage area
30.744 ft2 SA- 360 ft2 /acre
1.500 ft
31.000 ft
1.000 ft
46.500 ft3
31.000 ft3
16740.000 ft3
11160.000 ft2
1.500 It
31.000 ft
1.000 ft
46.500 ft3
31.000 ft3
V= 540 ft3 /acre drainage area
SA- 360 ft2 /acre
0.00876134 sq in A1=(0/Cd)/(2gh)A.5
where 0=V/time, Cd = 0.60, h=DSDl2
lime=88400 seconds (24 hours)
Diameter of Orifice (24 hour drawdown) 0.10561859 in
Final Orifice Diameter
Orifice Flow
Outlet Time
3.75 in Hole =
0.26113742 cfs
15.6682453 cfm
940.094716 cfh
22562.2732 d day
0.00206096 days
D1=2'(A1 /PI)^, 5
1
O=CdA'(2gh)A.5
Job no. Cad1352 Stormwater Management Revised 03/20/2000

IIIIIII 07_ SURVEYOR HAS MADE
Illrlrl FOR EASEMENTS OR
OWNERSHIP TITLE EVI
AND CURRENT TITLE
IIIa�PI 08. WATER & SEWER SEW
IIIM� 09. THERE ARE NO WETLA
NOTIFICATION OF RI
IIII OF ENGINEERS dated
ill I I tcy,+.
y p.a E4�lSac,T,
EkNERDETEcrNPlurAr
0 INV. 23.0'
j - -
RCP .... _ P-
--
PROP
T
7B OSFD 30' PAVCMFNT
63 95 LTER
EXTENSION rfll I; ,:"
VEGETATED .RLT
SEE OETNL
\ DECANT
ORIFICE
�UT-lt "v"
A I
RMWATE ; S 1n Cvw-SS Jec4. ,&4
\ m D •,
A , 1
/ f BULKHEAD ^ 1 E LOT 9
I I ' LOT 8 4 I ,� I$ leQs�
pft
r.t. ,' �
_ / I F ESAY NOW OR FORMERLY
' LARRY HOLLER 4
I
DEED BOOK 830, PAGE 678
0
— I STRUCTURE 09
-21— E
�.V t I DROP ftfT
LOT 1
— 1\\ STRUCK i /B
R47 2J.� N _
/ \ STRUCTURE od -�-, / — 1 / I
\ CULVERT \
\ 162• - 3G'•
1' RC .
STRUCIUWE zz
DROP IV \
\ 37'-30' RCP C711RE /T `(
2z I \ o_2Z / OP MET OP V&FT h /z
STRUCTURE p LOT 11 LOT t Q�� ZZ�a + ti � PROJEC
' cAT c eASH 4 16/ \lam 1 0 /� /// N PROPER'
I� � STRUCTURE (i�
CULVERT
TEMPORARY GRA)IEL / r N'
R .o \1� \\ %1L-DE-SAC Iti• T IM
2 SI
tog T�
\Ifi Intl AIIIAft k�S�gER I' i�
A - to.s TE
— — — — —v — Q I / BE
r ROAL)WAY R-2 50' R/W \
I OF
—4—Al

SECTION A -A
NTS
_ DESIGN STORAGE
SECTION B-B 1
NTS
m
23.8 DESIGN STORAGE
� FORESAY INV. O 19.D
CI,CD
!p I
Z
W
Z ,^
F
w
/ w
OWNER/DEVELOPER
DAVID A. HORTON
128 LITRE NINE DRIVE
MOREHEAD CITY. NC 28557
252 444 1355
Cloyton, P. E.
C.T. Clayton, Professional Engineer
4W J1 BLVD., BLD8. 5
SHE
STORMWATER MANAG
PLAN
for
DAVID A. HORT
MOREHEAD TOWNSHIP, CARTERET COUNTY, N
I
REFERENCE: LOT 13, 14 & PORTION OF L'
LITTLE NINE SUBDIVISION, MAP BOOK 18, PA
DEED BOOK 843, PAGE 134, & BOOK 846, 1
CARTERET COUNTY REGISTRY.
BRAD L. SUITT & ASSC
LAND SURVEYING - SITE PLA
IEIVV RONMEIN'TAL pygrTNINC - CC•MMERCL
NEW BERM, N_C
505 SLAUGHTERHOUSE

F'20.5''
t1T If1G rump.
W4 O
Z
JE
LEGEND
29 -- ~-
—30
EXISTING CONTOUR
RR
PROPOSED CONTOUR
RIPRAP
R W .
CENTERLINE
RIGHT of WAY
STORMWATER
5TORMWATER POND
BA51N BOTTOM ELEVATION 1G.0 Ft
PERMANENT POOL ELEVATION 22.0 ft
TEMPORARY POOL ELEVATION 23.8 ft
PERMANENT POOL SURFACE AREA
DRAINAGE AREA
IMPERVIOUS AREA
PERMANENT POOL VOLUME
DESIGN STORAGE VOLUME
FOREBAY VOLUME
SA/DA USED
DIAMETER OF ORIFICE
DESIGN TSS REMOVAL
12550= sq ft
9.41, acres
G.5G acres
45153 * cu Ft
248371 cu ft
9433= cu ft
2.9
1 MOLE 2'
85Z
SKEET 1 of 2

GRAPHIC SCALE
m a 12D Y«
( D( rat )
i inch = 00 tL CAD1352
i MODIFIED PER NCDENR LETTER DATED 3-16-00 1
dee
MODIFIED PER NCOENR LETTER DATED 3-1-00 1 dee
MODIFIED PER NCDENR LETTER DATED 1-18-00 1 dee
DESCRIPPON BY
a
GENERAL LEGEND
01. 0 = EXISTING IRON PIPE
02. O = NEW IRON PIPE MAP AWLe, PA01 07.
03.
R/W
= RIGHT OF WAY
04.
SQ.FT.
= SQUARE FEET
05.
UTILITY POLE
06.
# =
AERIAL LIGHT
07.
N =
EXISTING CONCRETE MONUMENT
08_
C/L
= EXISTING CENTERLINE OF PAVEMENT
09.
& =
P.K. NAIL
10.
P/L
= PROPERTY LINE.
SAND FILTER
NTS jlj+

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
March 16, 2000
Mr. David Horton, Owner
128 Little Nine Drive
Morehead City, NC 28557
�j •le'.•f W
Subject: ACKNOWLEDGMENT OF RECEIPT AND
REQUEST FOR ADDITIONAL INFORMATION
Stormwater Project No. SW8 991202
David A. Horton
Carteret County
Dear Mr. Horton:
The Wilmington Regional Office received a Stormwater Management Permit Application for David A.
Horton on March 15, 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:
. I. As stated in the March 1, 2000 letter, by giving the pond system a two foot deep channel
between the forebay and the main pond there is less area being created at the design depth of 6
feet then is allowed. The vast majority of the entire pond must be at the design depth, in this
case 6 foot deep. In order to help meet the 3:1 requirement as well as volume and surface area
requirements, replace the channel with a wooden baffle stretched out across the pond and
relocate the outlet structure to the other corner of the pond. A sketched drawing is included to
help with conception.
.i2. Please provide a new drainage map showing the two seperate runoff drainage areas.
3. Provide calculations for the sand filter design showing that the volume, surface area, and
orifice/draw down time requirements have been met. Include P.E. seal and signature.
114. Write out and sign on a separate sheet of paper the Operation & Maintenance agreement for the
sand filter. This O&M must be signed, dated, and notarized just like the O&M for the detention
pond.
--5. Please provide grading or other structure around the sand filter to prevent other runoff from
entering the device. The grading given for Lot 13, beside the sand filter, shows the potential for
off -site runoff entering the sand filter.
-/6. Please revise sheet 2 of 4 of the application to show the two drainage areas. For example the
pond would be Drainage Area 1, and the sand filter would be Drainage Area 2. I am also
including page 1 of 4 of the detention pond supplement form -so that corrections can be made
if needed.
127 Cardinal Dr. Ext., Wilmington, North Carolina 29405 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/10 % post -consumer paper

Mr. Horton
March 16. 2000
Stormwater Project No. SW8 991202
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 16, 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,
42
Scott Vinson
Environmental Engineer
RSSlsav: S:\WQS\STORMWAT\ADDINFO\991202.MAR
cc: Wilmington Regional Office
C.T. Clayton P.E.

-6'48' 63 95 — = — — — — — 98 VEGETATED FILTER
N 03_0to — — — — — SEE DETAIL
-24, - _ — EDPAS
AI 0. �,`\ SECURITY FENCE
1 I [ \ / by OWNER
DECANT
K 7Q �%Vw 1 " f _. )1 ORIFICE
11 1 WOOa 6-fIt I -_� STRUCTURE
LOT 7 , 1� V cl.a� I foWATER' ° A
2;.4G I \� IJ Ian [0rK4 o FZ ae. /
RM LOT 8 tO I (P cl¢ e�
NV. 173E I
Q ^QO
°�Sti
b 1 �26 1 3� NOW OR FORMERLY �3 2�
LARRY HOLLER 4�2 0'
OT 8 I=� 'I I i FOP.EM 18 a ^� DEED BOOK 830, PAGE 678 O ro
_ ry
01 1 1 STRUCTURE B9
o_
m' 1 —24- —76.4'01L — 1
` I I IDROP INLET\ I-77--PA-
LOT LOT 1Y 7/STRUCTUR p8
RIM 23.5 CUL/ERT� �- ZQ DRAIN EASE. ///P'
I I i 1 INS I9:6— — � \ li
5 }f STRUCTURE CULVERT
_ _ _ /
STRUCTURE R J 1 I0 DRAt. EAE$E,
I \ 782' - 3G' RCP . 0.27.
STRUCTURE #5
7'- 4' 1
V 37R30N ILET RCP TRUCTURE p7
�RDP INLET J' \DROP ,INLET //Z//
1 STRICTURE y3 LOT 11 ` LOT 1 L INV. 142
CA7BASIN
STRUCTURE III
1 I 1 BASIN ✓
CATCH BASINSTRUCTUY
CULVERT
R�
\ I 1 1
TEMPORARY GRAVEL
�C L-DE-SAC
I _ a
11 / R .0' -1+02_ .�- y DRAINAGE EASEMENT I -
I V. 20.4
--w v V __ V v '— V
rt 11
ROADWAY R-2 51_R-4---i--_ +
ROJECT
ROPERTY LINE
cr
I Q/
NOTE: C
IMPERVIOUS AF
SHALL BE 807
THE LOTS WILL
THAT ALL IMPS
BE DIRECTED
OR TOWARD TF
ALL ROOF DRA
DIRECTED SO i
BY THE POND.

lltftl��

o Clpyta�, P.E.
C.7. Clayton, Professional Engineer
TO:
Scott Vinson
NCDENR
Wilmington Regional Office
127 Cardinal Drive Ext.
Wilmington, NC 28405-3845
WE ARE SENDING: x 'Originals
❑ Specifications
LETTER OF TRANSMITTAL
DATE: March 7, 2000
PROJECT NO: Cad 1 352
TASK NO: 0001
RE: David A. Horton
Stormwater Project No. SW8991202
TRANSMITTAL NO: 1
PAGE 1 OF 1
x Prints
❑ Calculations
❑ Shop Drawings ❑ Samples
❑ Other -
Quantity
Drawing No.
Rev.
Description
Status
1
Revised partial Application, Stormwater Management
2
Cad1352
Copies of Stormwater Management Plan
nD E C E@ N E
MAR 15-
DINO
Paa a
Issue Status Code: A. Preliminary B. Fabrication Only C. For Information D. Bid
E. Construction F. For Review & Comments G. For Approval H. See
Remarks
REMARKS:
2807 NEUSE BLVD. BLDG. k5 NEW BEBN, NG 28562 252 672-0304 FAX [phone]
cc: Brad L. Suitt
David A. Horton
,Signed e
C.T. Cla , P. .
DAMy DocumentsUransCad1352sw2.doc

CT C.(r -4o 1
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ZV'5)

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
March 1, 2000
Mr. David A. Horton, Owner
128 Little Nine Dr.
Morehead City, NC 28557
1�
Ohl N
CD
NcR CAROLMA DERARTMENr OF
ENVIRONMENT AND NATURAL RESOURCES
Subject: ACKNOWLEDGMENT OF RECEIPT AND
REQUEST FOR ADDITIONAL INFORMATION
Stormwater Project No. S W 8 991202
David A. Horton
Carteret County
Dear Mr. Horton:
The Wilmington Regional Office received a Stormwater Management Permit Application for David A.
Horton on February 3, 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 forebay has been redesigned to be approximately 28% of the permanent pool volume. This
is a little bit more than what is allowed. Please try to design the forebay to be in a range
between 19-22 % of the permanent pool volume of 41,308 cu.ft.
By giving the pond system a two foot deep channel between the forebay and the main pond there
is less area being created at the design depth of 6 feet then is recommended. The two new baffle
walls that have been proposed can be spread apart a little and dug down 6 feet deep. If this can
not be done due to the excessive loss of the surface area and volume due to the earthen berm,
then timber bulkhead type berms are recommended.
There is about 120 feet of the entrance road not being collected and treated by the pond. In high
density developments, all new impervious surfaces are to drain to an engineered designed
treatment system. That bit of new impervious within the right-of-way of Little Nine Drive may
be allowed to drain away from the project site.
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. Horton
March 1, 2000
Stormwater Project No. SW8 991202
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 1, 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,
Scott Vinson
Environmental Engineer
RSS/sav: S:\WQS\STORMWAT\ADDINFO\991202.MAR
cc: Wilmington Regional Office
C.T. Clayton, P.E.

OC74CIayton, Professional Engineer
Scott Vinson
Environmental Engineer
127 Cardinal Dr. Ext.
Wilmington, NC 28405
910 395-3900
Stormwater Project No. SW8 991202
Dear Mr. Vinson:
RECEIVED
FEB 0 8 2000
BY:-----
February 2, 2000
In response to your letter dated January 18, 2000 on the Stormwater Plan for David
A. Horton, we have the following response to your comments and are enclosing a set
of plans and documents for your final review.
1) Section III. numbers 2 and 6 need to be filled in completely. For #6 on page
2 of 4 please fill in the receiving stream name and if you can not find the
classification for the stream let me know and I will find it on your behalf.
I am returning the 4 page application and the 4 page supplement form for
needed modifications.
Response: River Basin, Receiving, Stream and Receiving Stream Class are listed.
2) Please fill in Section IV. #2 on page 3 of 4 of the application. These deed
restrictions and protective covenants must be complete and recorded prior to
the sale/construction of any lot. From what is given on the application and
plans, there seems to be approximately 16,350 square feet of impervious
surface per each of the 15 buildable lots. Please verify and fill in the
deed restriction blank.
Response: David A. Horton response attached.
3) If Mr. C.T. Clayton and/or Brad Suitt & Assoc., P.A. will be resubmitting any
information on your behalf, please fill in their names under Section VII. on
page 4 of 4.
Response: Not applicable.
4) On page 3 of 4 of the Wet Detention Basin Supplement form, please correct the
sediment removal benchmarks from "elevations" to "depths" below the permanent
pool elevation of 22.0.
Response: Changes made on page 3 of 4 of the Wet Detention Basin Supplement form.
5) Please clearly define the property/project lines for the subdivision on the
plans.
Phone: [phone] - 2807 NEUSE BLVD., BLDG. 5 Mobile: [phone]
Fax: [phone] NEW BERN,NC 28562 Home: 910 897-0660

6-4000141"VA,
P.E.
Response: See plan. Property is bolder, labeled and put in legend.
6) Please delineate the drainage area for the pond, all impervious areas are to
be included. If the layout of each lot has not been decided yet, that please
note on the plans that the lots will be graded such that all impervious
runoff will be directed toward the street/pond. Note that all roof drains
are included and must be directed so as to be picked up by the pond.
Response: See note on sheet 1 of 2, Stormwater Management Plan for response on
impervious areas. We have delineated with a marker the pond drainage area on
sheet 1 of 2.
7) Please dimension the permanent pool of the pond on the plans.
Response: See sheet 1 of 2, Stormwater Management Plan.
8) Please provide the vegetated filter required for ponds designed for 8596 TSS
removal. These filters are not to be simply connector ditches and they
cannot have any other water flowing through them other that what is coming
from the pond. Please also provide a detail of the vegetated filter as well .
as the calculations needed to show the design width of the filter will have
non erosive flow. The filter will also need to have the permanent grassed
vegetation to be used specified. Note that these filters are to be designed
so that the only time there is standing water in them should be when the pond
is draining. I am including a sample detail of a vegetated filter for your
reference. The filter should be at least 30 feet in length and have a flow
spreader mechanism.
Response: See sheet 1 of 2, Stormwater Management Plan and sheet 2 of 2 for
detail.
9) The 6:1 vegetative shelf should be around the main pond only. I have
enclosed a pond section to help show it.
Response: See sheet 1 of 2, Stormwater Management Plan and sheet 2 of 2 for
detail.
10) Please raise the southern end of the fiorebay weir up to at least 1 foot below
the permanent pool elevation, i.e. 21.00 feet MSL.
Response: See sheet 1 of 2, Stormwater Management Plan. Modified fiorebay and
weir.
11) The required 3:1 length : width ration for the pond has not been meet, please
correct.
Response: See sheet 1 of 2, Stormwater Management Plan. Modified Pond.
Phone: [phone] SW8 991202 Mobile: [phone]
Fax: [phone] of 3 Home: 910 897-0660

"Ov"'n, P. E.
.. . � 6
12) Currently the forebay is only holding approximately 12% of the permanent pool
volume. Please increase the volume of the forebay to hold approximately 20%
of the total permanent pool volume.
Response: See sheet 1 of 2, Stormwater Management Plan. Modified forebay and
weir.
13) Please reference the project number above on all correspondence.
Response: Project number is referenced on correspondence.
Please review this submittal and should you have questions or comments please
advise.
Sincerely,
C.T. Clayton, P.E.
4
cc: David A. Horton
Brad L. Suitt
file
Phone: [phone] SW8 991202 Mobile: [phone]
Fax: [phone] of 3 Home: 910 897-0660

^� Phone: [phone] C Clayton, R Mobfax: 252 633-6551
ile: 252 671-6979
[e-mail]
C.T. Clayton, Professional Engineer
Pond Calculations Units Symbols & Governing Equations
Total Site Area 9.41 ac TA
Proposed Building Area 0.69 ac BA
Proposed Parking Area 5.87 ac PA
Green Area 2.85 ac GA
Proposed Pond Depth
Percent Impervious
69.71 %
Surface Area/Drainage Area % 2.9 %
Based on 75% Impervious
Permanent Pool Surface Area Req'd 11884.60 sq ft
Approximate runoff volume for 1" Storm 24811.30 cu ft
Permanent Pool Surface Area Provided 12550.39 sq ft
Surface Area 2' Above P.P. Surface 15335.29 sq ft
Approx. Design Storage Depth Req'd 1.78 ft
Permanent Pool Elevation
22.00 ft
Design Storage Elevation
23.80 ft
Top of Bank Elevation
25.00 ft
Bottom Elevation
16.00 ft
Design Storage Depth Provided
1.80 ft
Design Pool Surface Area
15046.62 sq ft
Design Storage Provided
24837.31 cu ft
�ECEIVED
FEB O 3.2000
DWQ
PROD #
(TA-GA)-100/rA
SA/DA (from Chart 3, 85% TSS removal)
SA/DA'TA'43560/100
V=[(BA'1)+(PA'.95)+(GA'.2)]43560/12
PSA (from CAD)
SA2 (from CAD)
DSD=[2/(PSA+SA2)]V
PPE=(from Site Plan)
OSE=(from Site Plan)
(from Site Plan)
(from Site Plan)
DSDP=DS-PP
DPSA (from CAD)
DS=DSDP'(PSA+DPSA)/2
Job no. Cad1352
Stormwater Management
Revised 01/25/2000
/ 64

ile: 252 671-6979
�+ Phone: [phone] C T�Claytoni RE Fax: [phone]
J [e-mail]
C.T. Clayton, Professional Engineer
Drawdown Outlet Size
Area (2 day drawdown)
4.5523954 sq in
A2=(Q/Cd)/(2gh)A.5
where Q=V/time, Cd = 0.60, h=DSD/2
time=172800 seconds (2 days)
Diameter of Orifice (2 day drawdown)
2.40754851 in
D2=2*(A2/PI)A.5
Area (5 day drawdown)
1.82095816 sq in
A5=(Q/Cd)/(2gh)A.5
where Q=V/time, Cal = .60, h=DSD/2
time=432000 seconds (5 days)
Diameter of Orifice (5 day drawdown)
1.52266738 in
D5=2*(A5/PI)A.5
Final Orifice Diameter
2.00 in Hole =
1
Orifice Flow
0.09908678 cfs
Q=CdA*(2gh)A.5
5.94520702 cfm
356.712421 cfh
8561.0981 cf day
Outlet Time
2.89814492 days
Riser Size
Storm Runoff Q = Q=CAi
C = 0.697139246
A = 9.41
55.9777639 cfs i = 7.00 10 year
83.9666459 cfs i = 10.50 100 year
Weir Discharge 84.213479 cfs Q = CwLH34
Cw = 3.33
L = pi*d
L = pi*40"
L = 10.47197551
H = 1.80
40" Riser outlet will handle a 100 year storm with Pond water level rise less than 1.80 feet
Job no. Cad1352
Stormwater Management
Revised 01/25/2000

SEDCAD 4 for Windows
-Copyright 1998 Pamela J. Schwab
Cldl Software Design
1
Sediment Basin
Phase 2
Revised 01-25-00
for Vegetated Filter Calculations
FEB O 3.2000
DWO
PROJ #
M
C.T. Clayton
2807 Neuse Blvd.,
Bldg. 5
New Bem, NC 28562
Phone: [phone]
Email: [e-mail]
eE;L
rj;;)5
_`
R-' z-00
Filename: Cad1352-31.sc4 Printed 01-25-2000

SEDCAD 4 for Windows
Coprght 1998 Pamela J. Schwab
Civil Software Design
Genera/ Information
Storm Information:
Storm Type: NRCS Type III
Design Storm: 25 yr - 24 hr
Rainfall Depth: 8.500 inches
Filename: Cad1352-31.sc4 Printed 01-25-2000

SEDCAD 4 for Windows
Copyright 1996 Pamela J. Schwab
Civil Software Design
Structure Networking;
Type
Stru
#
(Flaws
into)
Stru
#
Musk. K
(hrs)
Musk. X Description
Pond I
#1
==>
#2
0.000
0.000 ! Catch Basin
Culvert
#2
=_>
#3
0.000
0.000
Pond
#3
=_>
#4
0.000
0.000 Catch Basin
Culvert
#4
=_>
#5
0.000
0.0001
Pond
F#5
=_>
#6
0.000
0.000 Drop Inlet
Culvert
I #6
=_>
#7
0.000
0.000
Pond
#7
=_>
#8
0.000
0.000 Drop Inlet
Culvert
#8
=_>
#9
0.000
0.000
Pond
#9
=_>
#10
I 0.000
0.000 Sediment Basin
Channel
#10
=_>
End
I 0.000
0.000 Vegetated filter
1¢ #1
Pond
#2
Culvert
#3
Pond
#4
Culvert
#5
Pond
#6
Culvert
4
#7
Pond
#8
Culvert
41
#9
Pond
#10
Chan?
Filename: Cad1352-31.sc4 Printed 01-25-2000

SEDCAD 4 for Windows
Copyright 1998 Pamela J. Schwab
Civil Software Design
4
Structure Summary;
Immediate
Total
Peak
Total
Contributing
Contributing
Discharge
Runoff
Area
Area
Volume
(ac)
(ac)
(cfs)
(ac-R)
In
11.22
2.09
#1
3.295
3.295
Out
11.21
2.09
#2
0.000
3.295
11.21
2.09
In
21.68
4.05
#3
3.069
6.364
Out
21.67
4.05
#4
0.000
6.364
21.67
4.05
In
23.98
4.48
#5
0.680
7.044
Out
23.97
4.48
#6
0.000
7.044
23.97
4.48
In
26.68
4.98
#7
0.797
7.841
Out
26.67
4.98
#8
0.000
7.841
26.67
4.98
In
-
26.67
4.98
#9
0.000
7.841
Out
3.99
4.98
#10
0.000
7.841
3.99
4.98
Filename: Cad1352-31.so4 Printed 01-25-2000

SEDCAD 4 for Windows
Copynght 1998 Pamela J. Schwab
Civil Software Design
Catch Basin
Pond Inputs:
Structure Detail;
Initial Pool Elev: 0.10
Initial Pool: 0.00 ac-ft
Straight Pipe
Barrel Barrel
Entrance Tailwater
Barrel
Manning's Spillway
Diameter Length
Loss Depth
Slope (%)
n Elev
(in) (ft)
� Coefficient (R)
24.00 31.00 0.20
1 0.0160 0.101
0.20 0.00
Pond Results:
Peak Elevation: 1.93
Dewater Time: 0.49 days
Dewatenng time is calculated from peak stage to lowest spillway
Elevation -Capacity -Discharge Table
Elevation
Area
(ac)
Capacity
(ac-ft)
Discharge
(Cfs)
Dewater
Time
(hrs)
0.00
0.000
0.000
0.000
0.10
0.000
0.000
0.000
Spillway #1
0.50
0.000
0.000
1.577
10.50
1.00
0.000
0.000
4.442
1.05
1.50
0.000
0.000
7.191
0.05
1.93
0.000
0.000
11.208
0.05 Peak Stage
2.00
0.000
0.000
11.880
2.50
0.000
0.000
15.749
3.00
0.000
0.000
18.874
3.50
0.000
0.000
21.862
3.85
0.000
0.000
23.736
Detailed Discharge Table
Filename: Cad1352-31.sc4 Printed 01-25-2000

SEDCAD 4 for Windows
Copyright 1998 Pamela J. Schwab
Civil Software Design
0
Elevation
Straight Pipe
(cfs)
Combined
Total
Discharge
(cfs)
0.00
0.000
0.000
0.10
0.000
0.000
0.50
(1)>1.577
1.577
1.00
(1)>4.442
4.442
1.50
(1)>7.191
7.191
2.00
(1)>11.880
11.880
2.50
(3)>15.749
15.749
3.00
(5)>18.874
18.874
3.50
(5)>21.862
21.862
3.85
(5)>23.736
23.736
Structure #2 (Culvert%
Culvert Inputs:
Max. Tailwater Entrance
Length (ft) Slope (%) Manning's n Headwater Loss Coef.
(ft) (ft) (Ke)
31.00 0.20 0.0160 2.00 0.00 0.20
Culvert Results:
Design Discharge = 11.21 cfs
Minimum pipe diameter: 1 - 24 inch pipe(s) required
Structure #3 (Ponds
Catch Basin
Pond Inputs:
Initial Pool Elev: 0.10
Initial Pool: 0.00 ac-ft
Straight Pipe
Barrel Barrel
Entrance Tailwater
Barrel
Manning's Spillway
Diameter Length
Loss Depth
Slope (%)
n Elev
(in) (ft)
Coefficient (ft)
30.00 37.00 0.20
0.0160 0.101
0.20 0.00
Pond Results:
Peak Elevation: 2.54
Dewater Time: 0.49 days
Dewatenng time is calculated from peak stage to lowest spillway
Filename: Cad1352-31.sc4 Printed 01-25-2000

SEDCAD 4 for Windows
Copyright 1998 Pamela J. Scnwab
Civil Software Design
7
Elevation -Capacity -Discharge Table
Elevation
Area
(ac)
Capacity
(ac-ft)
Discharge
(cfs)
Dewater
Time
(hrs)
0.00
0.000
0.000
0.000
0.10
0.000
0.000
0.000
Spillway #1
0.50
0.000
0.000
1.969
9.05
1.00
0.000
0.000
6.035
2.45
1.50
0.000
0.000
9.827
0.10
2.00
0.000
0.000
14.388
2.50
0.000
0.000
21.210
2.54
0.000
0.000
21.667
0.05 Peak Stage
3.00
0.000
0.000
27.174
3.50
0.000
0.000
30.885
3.85
0.000
0.000
34.094
Detailed Discharge Table
Elevation
Straight Pipe
(cfs)
Combined
Total
Discharge
(cfS)
0.00
0.000
0.000
0.10
0.000
0.000
0.50
(1)>1.969
1.969
1.00
(1)>6.035
6.035
1.50
(1)>9.827
9.827
2.00
(1)>14.388
14.388
2.50
(1)>21.210
21.210
3.00
(2)>27.174
27.174
3.50
(5)>30.885
30.885
3.85
(5)>34.094
34.094
Structure #4 (�LlvertJ
Culvert Inputs:
Max. Tailwa[er Entrance
Length (ft) Slope (%) Manning's n Headwater Loss Coef.
(ft) (ft) (Ke)
37.00 0.20 0.0160 2.50 0.00 0.20
Culvert Results:
Design Discharge = 21.67 cfs
Minimum pipe diameter: 1 - 30 inch pipe(s) required
Filename: Cad1352-31.sc4 Printed 01-25-2000

SEDCAD 4 for Windows
Copyright 1998 Pamela J. Schwab
Civil Software Design
Drop Inlet
Pond Inputs:
Initial Pool Elev: 0.10
Initial Pool: 0.00 ac-R
Straight Pipe
Barrel Barrel
Entrance Tailwater
Barrel
Manning's Spillway
Diameter Length
Loss Depth
Slope (%)
. n Elev
(in) (R)
Coefficient (R)
36.00 182.00 0.201
0.0160 0.101
0.20 0.00
Pond Results:
Peak Elevation: 2.58
Dewater Time: 0.49 days
Dewatedng t/me is calculated from peak stage to lowest -spillway
Elevation -Capacity -Discharge Table
Elevation
Area
(ac)
Capacity
(ac-R)
Discharge
(cfs)
Dewater
Time
(hrs)
0.00
0.000
0.000
0.000
0.10
0.000
0.000
0.000
Spillway #1
0.50
0.000
0.000
4.685
11.10
1.00
0.000
0.000
8.965
0.50
1.50
0.000
0.000
12.654
2.00
0.000
0.000
16.166
2.50
0.000
0.000
22.664
2.58
0.000
0.000
23.971
0.05 Peak Stage
3.00
0.000
0.000
30.414
3.50
0.000
0.000
36.973
3.90
0.000
0.000
40.307
Detailed Discharge Table
Filename: Cadl352-31.sc4 Printed 01-25-2000

SEDCAD 4 for Windows
Copyright 1998 Pamela J. Schwab
Civil Software Design
0
Elevation
Straight Pipe
(ds)
Combined
Total
Discharge
WS)
0.00
0.000
0.000
0.10
0.000
0.000
0.50
(1)>4.685
4.685
1.00
(1)>8.965
8.965
1.50
(1)>12.654
12.654
2.00
(1)>16.166
16.166
2.50
(1)>22.664
22.664
3.00
(1)>30.414
30.414
3.50
(2)>36.973
36.973
3.90
(6)>40.307
40.307
Structure #6 (Culvert
Culvert Inputs:
Max. Tailwater Entrance
Length (ft) Slope (%) Manning's n Headwater Loss Coef.
(ft) (R) (Ke)
182.00 0.20 0.0160 2.50 0.00 0.20
Culvert Results:
Design Discharge = 23.97 cfs
Minimum pipe diameter: 1 - 36 inch pipe(s) required
Structure #7 692nd1
Drop Inlet
Pond Inputs:
Initial Pool Elev: 0.10
Initial Pool: 0.00 ac-R
Straight Pive
Barrel Barrel
Entrance Tailwater
Barrel
Manning's Spillway
Diameter Length
Loss Depth
Slope (%)
n Elev
(in) (ft)
Coefficient (R)'
36.00 128.00 0.20
0.0160 0.101
0.20 0.00
Pond Results:
Peak Elevation: 2.71
Dewater Time: 0.49 days
Dewatering time is calculated from peak stage to lowest spillway
Filename: Cad135231.sc4 Printed 01-25-2000

SEDCAD 4 for Windows
Copynght 1998 Pamela J. Schwab
Civil Software Design
10
Elevation -Capacity -Discharge Table
Elevation
Area
(ac)
Capacity
(ac-ft)
Discharge
(crs)
Dewater
Time
(hrs)
0.00
0.000
0.000
0.000
0.10
0.000
0.000
0.000
Spillway #1
0.50
0.000
0.000
3.811
10.60
1.00
0.000
0.000
8.528
0.95
1.50
0.000
0.000
12.724
0.05
2.00
0.000
0.000
16.432
2.50
0.000
0.000
23.298
2.71
0.000
0.000
26.670
0.05 Peak Stage
3.00
0.000
0.000
31.390
3.50
0.000
0.000
38.848
4.00
0.000
0.000
44.547
4.50
0.000
0.000
51.007
5.00
0.000
0.000
56.745
5.50
0.000
0.000
61.945
5.60
0.000
0.000
62.937
Detailed Discharge Table
Elevation
Straight Pipe
(cPs)
Combined
Total
Discharge
(ffs)
0.00
0.000
0.000
0.10
0.000
0.000
0.50
(1)>3.811
3.811
1.00
(1)>8.528
8.528
1.50
(1)>12.724
12.724
2.00
(1)>16.432
16.432
2.50
(1)>23.298
23.298
3.00
(1)>31.390
31.390
3.50
(2)>38.848
38.848
4.00
(6)>44.547
44.547
4.50
(6)>51.007
51.007
5.00
(6)>56.745
56.745
5.50
(6)>61.945
61.945
5.60
(6)>62.937
62.937
Culvert Inputs:
Rename : Cad1352-31.sc4 Printed 01-25-2000

SEDCAD 4 for Windows
Copyright 1998 Pamela J. Schwab
CiNI Software Design
Max. Tailwater Entrance
Length (ft) Slope (%) Manning's n Headwater ft Loss Coef.
(ft) () (Ke)
126.00 0.20 0.0160 3.00 0.00 0.20
Culvert Results:
Design Discharge = 26.67 cfs -
Minimum pipe diameter: 1 - 36 inch pipe(s) required
Structure #9 "nd1
Sediment Basin
Pond Inputs:
Initial Pool Elev: 7.80
Initial Pool: 0.00 ac-R
Perforated Riser
Riser Riser Height
Diameter
Barrel Barrel Barrel Slope Number Of
(ft)
Diameter u Manning's n Spillway Elev Holes per
Length (ft) (/o)
(in)
(in) Elev
40.00 7.801
6.00 1.00 45.00 0.0140 7.90 6
Pond Results:
Peak Elevation: 15.10
Dewater Time: 0.85 days
Dewatedng time is calculated from peak stage to lowest spillway
Elevation -Capacity -Discharge Table
Elevation
Area
(ac)
Capacity
(ac-ft)
Discharge Dewater
Time
(cfs) (hrs)
0.00
0.000
0.000
0.000
0.50
0.001
0.000
0.000
1.00
0.004
0.001
0.000
1.50
0.010
0.005
0.000
2.00
0.017
0.012
0.000
2.50
0.027
0.022
0.000
3.00
0.039
0.039
0.000
3.50
0.053
0.062
0.000
4.00
0.069
0.092
0.000
4.50
0.087
0.131
0.000
5.00
0.107
0.179
- 0.000
5.50
0.130
0.238
0.000
Filename: Cad1352-31.so4
Printed 01-25-2000
�S

SEDCAD 4 for Windows
Copyright 1998 Pamela J. Schwab
Civil Software Design
12
Elevation
Area
(ac)
Capacity
(ac-ft)
Discharge
(cgs)
Dewater
Time
(hrs)
6.00
0.155
0.309
0.000
6.50
0.181
0.393
0.000
7.00
0.210
0.491
0.000
7.50
0.241
0.604
0.000
8.00
0.275
0.733
1.027
8.10
8.50
0.310
0.879
2.912
0.95
8.90
0.340
1.009
2.977
Detailed Discharge Table
Elevation
Pelf. Riser (cfs)
Combined
Total
Discharge
(cfs)
0.00
0.000
0.000
0.50
0.000
0.000
1.00
0.000
0.000
1.50
0.000
0.000
2.00
0.000
0.000
2.50
0.000
0.000
3.00
0.000
0.000
3.50
0.000
0.000
4.00
0.000
0.000
4.50
0.000
0.000
5.00
0.000
0.000
5.50
0.000
0.000
6.00
0.000
0.000
6.50
0.000
0.000
7.00
0.000
0.000
7.50
0.000
0.000
8.00
1.027
1.027
8.50
2.912
2.912
8.90
2.977
2.977
Structure #10 (yeaetated Channel
Vegetated filter
Parabolic Vegetated Channel Inputs:
Material: Tall fescue
Filename: Cad1352-31.sc4 Printed 01-26-2000

SEDCAD 4 for Windows
Copyright 1998 Pamela J. Schwab
Civil Software Design
13
o Retardance
Slope (/o)
Freeboard Freeboard Freeboard
Limiting
Velocity
Clams
Depth (ft) % of Depth Mult. x (VxD)
(fps)
0.1 D, B
I 7.0
Vegetated Channel Results:
Stability Stability
Class D w/o Class D w/
Freeboard Freeboard
Capacity Capacity
Class B w/o Class B w/
Freeboard Freeboard
Design Discharge:
3.99 cfs
3.99 cfs
Depth:
1.55 ft
2.57 ft
Top Width:
6.20 ft
10.30 It
Velocity:
0.62 fps
0.23 fps
X-Section Area:
6.42 sq ft
17.68 sq ft
Hydraulic Radius:
0.886
1.471
Froude Number:
0.11
0.03
Roughness Coefficient:
0.0700
0.2702
Filename: Cad1352-31.sc4 Printed 01-26-2000

SEDCAD 4 for Windows
Copyright 1998 Pamela J. Schwab
CiNI Software Design
14
Subwatershed Hydrology Detail;
Stru
#
SWS
#
SWS Area
(ac)
Time of
Conc
(hrs)
Musk K
(hrs)
Musk X
Curve
Number
UHS
Peak
Discharge
(C's)
Runoff
Volume
(ac-R)
#1
1
0.196
0.120
0.120
0.214
98.000
TR55
0.68
0.135
2
0.110
0.077
0.077
0.196
98.000
TR55
I 0.38
0.076
3
2.990
0.052
0.052
0.173
92.000
TR55
10.17
1.878
3.295
11.22
2.089
#2
3.295
11.21
2.089
#3
1
0.196
0.120
0.120
0.214
98.000
TR55
0.68
0.135
2
0.110
0.078
0.078
0.196
98.000
TRSS
0.38
0.076
3
0.399
0.030
0.030
0.173
92.000
TR55
1.36
0.250
4
0.940
0.030
0.030
0.173
92.000
TR55
3.20
0.590
5
0.239
0.084
0.084
0.196
98.000
TRS5
0.83
0.165
6
1.186
0.046
0.046
0.173
92.000
TR55
4.03
0.745
6.364
21.68
4.049
#4
6.364
21.67
4.049
#5
1
0.680
0.046
0.046
0.173
92.000
TR55
2.31
0.427
7.044
23.98
4.476
#6
�
7.044
23.97
4.476
#7
1
0.797
0.046
0.046
0.173
92.000
TR55
2.71
0.501
7.841
26.68
4.977
#8
7.841
26.67
4.977
#9
7.841
26.67
4.977
#10
7.841
3.99
4.977
Subwatershed Time of Concentration Details:
Stru
SWS
Land Flow Condition
Slope (%) Vert Dist. Horiz. Dist.
Velocity
Time (hrs)
R)
(fps)
#1
1
7. Paved area and small upland
0.40 2.20 550.00
1.270
0.120
gullies
#1
1
Time of Concentration:
0.120
#1
2
7• Paved area and small upland
0.30 0.92 306.66
1.100
0.077
gullies
#1
2
Time of Concentration:
0.077
Filename: Cad1352-31.sc4 Printed 01-25-2000

SEDCAD 4 for Windows
Copyright 1998 Pamela J. SChwab
Civil Software Design
15
Stru
#
SWS
#
Land Flow Condition
Slope (%)
Vert. Dist
(ft)
Horiz. Dist.
(ft)
Velocity
(fps)
Time (hrs)
#1
3
7. Paved area and small upland
gullies
0.20
0.34
170.00
0.900
0.052
#1
3
Time of Concentration:
0.052
#3
1
7. Paved area and small upland
gullies
0.40
2.20
550.00
1.270
0.120
#3
1
Time of Concentration:
0.120
#3
2
7. Paved area and small upland
gullies
0.30
0.92
309.00
1.100
0.078
#3
2
Time of Concentration:
0.078
#3
3
7• Paved area and small upland
gullies
0.20
0.19
99.00
0.900
0.030
#3
3
Time of Concentration:
0.030
#3
4
7. Paved area and small upland
gullies
0.20
0.20
100.00
0.900
0.030
#3
4
Time of Concentration:
0.030
#3
5
7. Paved area and small upland
gullies
0.30
1.00
336.00
1.100
0.084
#3
5
Time of Concentration:
0.084
#3
6
7. Paved area and small upland
gullies
0.20
0.30
150.00
0.900
0.046
#3
6
Time of Concentration:
0.046
#5
1
7. Paved area and small upland
gullies
0.20
0.30
150.00
0.900
0.046
#5
1
Time of Concentration:
0.046
#7
1
7. Paved area and small upland
gullies
0.20
0.30
150.00
0.900
0.046
#7
1
Time of Concentration:
0.046
Subwatershed Muskingum Routing Details;
Stru
#
Sw5
#
Land Flow Condition
Slope (%)
Vert. Dist
(ft)
Horiz. Dist.
(ft)
Velocity
(fps)
Time (hrs)
#1
1
7. Paved area and small upland
gullies
0.40
2.20
550.00
1.270
0.120
#1
1
Muskingum K:
0.120
#1
2
7• Paved area and small upland
gullies
0.30
0.92
306.66
1.100
0.077
#1
2
Muskingum K:
0.077
#1
3
7. Paved area and small upland
gullies
0.20
0.34
170.00
0.900
0.052
#1
3
Muskingum K:
0.052
#3
1
7. Paved area and small upland
gullies
0.40
2.20
550.00
1.270
0.120
#3
1
Muskingum K:
0.120
#3
2
7. Paved area and small upland
gullies
0.30
0.92
309.00
1.100
0.078
#3
2
Muskingum K:
0.078
Filename: Cad1352-31.scA Printed 01-25-2000

SEDCAD 4 for Windows
Copyright 1998 Pamela J. Schwab
Civil Software Design
M'
SW
SWS
Land Flow Condition
Slope ("/o)
Vert. Dist.
Horiz. Dist.
Velocity
Time (hrs)
#3
3
7. Paved area and small upland
0.20
0.19
99.00
0.900
0.030
gullies
#3
3
Muskingum K:
0.030
#3
4
7• Paved area and small upland
0.20
0.20
100.00
0.900
0.030
gullies
#3
4
Muskingum K:
0.030
#3
5
7• Paved area and small upland
0.30
1.00
336.00
1.100
0.084
gullies
#3
5
Muskingum K:
0.084
#3
6
7• Paved area and small upland
0.20
0.30
150.00
0.900
0.046
gullies
#3
6
Muskingum K:
0.046
#5
1
7• Paved area and small upland
0.20
0.30
150.00
0.900
0.046
gullies
#5
1
Muskingum K:
0.046
#7
1
7. Paved area and small upland
0.20
0.30
150.00
0.900
0.046
gullies
#7
1
Muskingum K:
0.046
Filename: Cad1352-31.sc4 Printed 01-25-2000

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
January 18, 2000
Mr. David A. Horton, Owner
128 Little Nine Dr.
Morehead City, NC 28557
Dear Mr. Horton:
0 WA
C R
NORTH CAROUNA DEPARTMENT OF
ENVIRONMENT AND NI URA RESOURCES
Subject: ACKNOWLEDGMENT OF RECEIPT AND
REQUEST FOR ADDITIONAL INFORMATION
Stormwater Project No. S W 8 991202
David A. Horton
Carteret County
The Wilmington Regional Office received a Stormwater Management Permit Application for David A.
Horton on December 1, 1999. A preliminary review of that information has determined that the application
is not complete. The following information is needed to continue the stormwater review:
Section III. numbers 2 and 6 need to be filled in completely. For #6 on page 2 of 4 please fill
in the receiving stream name and if you can not find the classification for the stream let me
know and I will find it on your behalf. I am retuming the 4 page application and the 4 page
supplement form for needed modifications.
2. Please fill in Section IV. # 2 on page 3 of 4 of the application. These deed restrictions and
protective covenants must be complete and recorded prior to the sale/construction of any lot.
From what is given on the application and plans, there seems to be approximately 16,350 square
feet of impervious surface per each of the 15 buildable lots. Please verify and fill in the deed
restriction blank.
If Mr. C.T. Clayton and/or Brad Suitt & Assoc., P.A. will be resubmitting any information on
your behalf, please fill in their names under Section VII. on page 4 of 4.
4. On page 3 of 4 of the Wet Detention Basin Supplement form, please correct the sediment
removal benchmarks from "elevations" to "depths" below the permanent pool elevation of22.0.
Please clearly define the property/project lines for the subdivision on the plans.
,1t 6. Please delineate the drainage area for the pond, all impervious areas are to be included. If the
layout of each lot has not been decided yet, than please note on the plans that the lots will be
graded such that all impervious runoff will be directed toward the street/pond. Note that all roof
drains are included and must be directed so as to be picked up by the pond.
7. Please dimension the permanent pool of the pond on the plans.
127 Cardinal Dr. Ext., Wilmington, North Carolina 28405 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/]0°/ post -consumer paper

Mr. Horton
January 18, 2000
Stormwater Project No. SW8 991202
8. Please provide the vegetated filter required for ponds designed for 85% TSS removal. These
filters are not to be simply connector ditches and they cannot. have any other water flowing
through them other than what is coming from the pond. Please also provide a detail of the .
vegetated filter as well as the calculations needed to show the design width of the filter will have
non erosive flow. The filter will also need to have the permanent grassed vegetation to be used
specified. Note that these filters are to be designed so that the only time there is standing water
in them should be when the pond is draining. I am including a sample detail of a vegetated filter
for your reference. The filter should be at least 30 feet in length and have a flow spreader
mechanism.
9. The 6:1 vegetative shelf should be around the main pond only. I have enclosed a pond section
to help show this..
10. Please raise the southern end of the forebay weir up to at least 1 foot below the permanent pool
elevation, i.e. 21.00 feet MSL.
X 11. The required 3:1, length : width ratio for the pond has not been meet, please correct.
�t 12. Currently the forebay is only holding approximately 12% of the permanent pool volume. Please
increase the volume of the forebay to hold approximately 20% of the total permanent pool
volume.
13. Please reference the project number above on all correspondence.
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 February 18, 2000, or the application will be
returned as incomplete. Theyetuin of a project will necessitate resubmittal of all required items, including the
application fee. 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.
If you have any questions concerning this matter please feel free to call me at [phone].
Sincerely,
Scott Vinson
Environmental Engineer
RSS/sav: S:\WQS\STORMWAT\ADDINFO\991202.JAN
cc: Wilmington Regional Office
C.T. Clayton, P.E.

5TORMWATER MAINTENANCE PLAN
for
DAVID A. HORTON
COMMERCIAL PARK
Morehead Townehip Carteret County
North Carolina
October 2,1999
1-

TABLE of CONTENT5
Narrative............................................................................................................................................................................... 3
MaintenancePlan............................................................................................................................................................... 5
-2-

NARRATIVE
The purpose of the project is to construct a stormwater retention pond to serve 9.41 acre Commercial Park.
The project is in Morehead Township, Carteret County, North Carolina and is being developed by David A.
Horton.
The work proposed will include excavation of the stormwater retention pond for the Commercial Park, and
construction of its on site storm drainage system.
atC-Df-sad 2t=
5ee Plan.
Land use in the vicinity is commercial and residential. The property to the southeast is owned by David A.
Horton, all other properties adjoining are owned by others, and will not be affected by the work.
A temporary gravel construction entrance/exit will be installed at the east project entrance. During wet
weather it may be necessary to wash vehicle tires at this location. The entrance will be graded so that
runoff water will be directed away from proposed roadway.
As soon as final grade is reached on the proposed roadway, the subgrade will be stabilized with a 6-inch
course of NC DOT standard size ABC stone to prevent erosion and dust during the construction prior to
paving.
Slopes will be lightly roughened by disking just prior to vegetating. 5urface stabilization will be
accomplished with vegetation and mulch as specified in the vegetation plan. Roadway base courses will fie
installed as soon as finished grade is reached. Dust control is not expected to be a problem due to the
small area of exposure. 51hould excessive dust be generated, it will be controlled by sprinkling with water.
vein
The project site soils consists mainly of sand, silt and clay.
The stormwater collection system described herein and on the attached plan will provide the following
methods for control of sediments and for removal of pollutants from the developed site runoff.
1. Collection of all runoff from the site during development of the stormwater retention pond with
controlled discharge.
-3-

2. Retention of the first one (1) inch of rainfall of runoff on the roadway and proposed parking and
building areas into the stormwater retention pond. This runoff will drain over a 2 to 5 day
period into the grass -lined Swale before draining into an existing Swale.
3. The retention time for the pond are set at 2.58 days with a total outfall of 8592 cf/day from
a 2 inch diameter orifice.
4. The stormwater runoff in excess of the first one (1) inch of rainfall will discharge from the
stormwater retention pond into a decant orifice structure. The storm pool elevation is set at
23.85' ABV M51- with an additional 11' emergency discharge, at elevation 24.0' adjacent to the
existing ditch, as shown on the plan.
5. The entire project site to be served by the stormwater retention pond as shown on the
"5tormwater Management flan of David A. Horton".
6. No 404 wetlands have been determined to be on this site.
7. Seeding specifications shall be as specified in the approved Erosion and Sedimentation
Control Plan.
-4-

MAINTENANCE PLAN
The Owner Shall maintain the pond during the construction phase of the project and after construction is
completed for all routine and non -routine maintenance tasks. The Owner shall also be responsible for the
perpetual care of the stormwater retention pond.
All erosion and sediment control practices shall be checked for stability and proper operation following every
runoff producing rainfall and in no case less than once every week during construction. All repairs shall be
made immediately and shall be in accordance with the approved Erosion and Sedimentation Control Plan.
The stormwater retention pond shall be inspected during the construction phase of the project following every
runoff producing rainfall and in no case less than once a week. Check the embankment, spillway, outlet, and
Swale for erosion damage, and inspect the embankment also for piping and settlement. Make all necessary
repairs immediately. Remove all trash and other debris from around the decant orifice structure and from
around the pool area. Periodic inspection of the discharge orifice shall assure that the system is not
clogged. The retention pond shall be inspected for a build-up of sediment. If and when the sediment layer
exceeds 18 inches thick on the average above the design grade, then this sediment shall be removed. At the
close of the construction phase of the project, the pond shall be cleaned of excess sediment to the designed
grade and begin functioning as stormwater retention pond. All regrading or repairing of the side slopes,
seeding, mowing and any and all repairs shall be performed prior to close-out of the construction phase.
The grass -lined Swale from pond overflow structure shall be properly inspected and maintained against
erosion, weeds, and woody vegetation. All seeded areas shall be maintained to sustain the required
vegetation. Any and all bare areas shall be replanted as necessary, with all repairs made immediately.
Owner shall be responsible for all routine and non -routine requirements associated with the maintenance of
the stormwater retention pond.
Upon completion of earth disturbing activities and for 12 months following completion of the work, the owner
shall inspect the site following every runoff producing rainfall. A written log shall be maintained of any needed
repairs noted at the inspection, the name of the Contractor completing the repairs, and the date such
repairs are completed.
ISMWaLTA
1. Mowing. The side -slopes, embankment, buffer area, areas within the fence, areas adjacent to the
emergency spillways and the grass -lined swales shall be mowed at least once a month during the main
growing season and at least two other times during the year to prevent woody growth and to control
weeds. Grass shall be mowed to a "meadow -like" condition and shall be maintained, according to
Section 6.11 Permanent Seeding of the approved Erosion and Sedimentation Control Plan.
51

2. Insoe_ ctione The stormwater retention pond shall be inspected (at a minimum of) on an annual
basis to ensure that the structure operates in the manner originally intended. Additional
inspections shall be conducted during wet weather, or times of extreme weather to determine if
each pond is functioning properly. Inspection priorities shall include (but not limited to) the
following: checking the embankment for any erosion, subsidence, cracking, bare areas in the grass,
and tree growth; the condition of the emergency spillway and adjacent ditch; the fence and adjacent
planting buffers; the accumulation of sediment, clogging of the decant orifice structure; the
adequacy of upstream and downstream channel erosion protection measures including any
modifications which have occurred to the contributing watershed, and the pond structure including
the stability of the side slopes. Inspections shall be carried out with "As -Built" retention pond
plans
3. P-el �Littcr Removal. Debris and litter removal from the surface of the pond shall be included
as a part of the periodic mowing operation. Particular attention shall be paid to any floating debris
around the decant orifice structure, and the structure shall be checked for possible clogging. Any
trash found within the area of the pond, ditch, and fence shall be removed and disposed of properly
according the County regulations.
4. Erosion Control Corrective measures and repairs shall be done to the pond side slopes,
embankment, emergency spillway and grass lined Swale where settlement, slumping, and erosion has
occurred. Repair as necessary. Repair or replace the riprap protecting the channel near the outlet
as required to stop the erosion. All repairs shall be done in accordance with the original plans and
specifications.
5. Nuisance CDntrOl. Owner shall maintain the retention pond and adjacent areas so as to control the
possible problems of weeds, More, algae, and insects. Proper maintenance shall take care of most
problems except in times of extreme dry weather. Owner shall also use biological control against
mosquito's and algae through the use of fish and fat head minnows when possible in lieu of chemical
applications.
1. 5tructure. Repairs and Replacement Owner shall replace all deteriorated inlet/outlet works and
decant orifice structure when deterioration from use and age causes them to fail and function
properly. Owner shall be responsible for all costs incurred with their replacement. Replacement shall
be in accordance with original plans and specifications.
2. 5ediment Removal. Owner shall be responsible for the removal of excess accumulated sediment in the
pond when the storage capacity is significantly reduced from the design capacity due to the properly
designed and functioning stormwater retention pond. Owner shall be responsible for all incurred costs
of removal and proper disposal of the sediment in accordance with all local, state, and federal
regulations. Sediment removal/clean out cycle for ctormwater retention pond is recommended on a
ten to twenty year cycle. Owner shall every five (5) years measure the depth of sediment above design
grade to determine rate of accumulation and to establish a time line for sediment removal.
Irl

761 Cloytasr, P.E.
Clayton, Professional Engineer
Vv w LETTER OF TRANSMITTAL
TO.
Carol Miller
NCDENR
Wilmington Regional Office
127 Cardinal Drive Ext.
Wilmington, NC 28405-3845
DATE: November 24, 1999
PROJECT NO: Cad 1352
TASK NO: 0001
RE: David A. Horton
TRANSMITTAL NO: 1
PAGE 1 OF 1
WE ARE SENDING: ❑ Originals x Prints
x Specifications x Calculations
❑ Shop Drawings ❑ Samples
❑ Other -
Quantity
Drawing No.
Rev.
Description
Status
1
$420.00 check, Stormwater Management fee
1
Completed Application, Stormwater Management
2
Copies of Stormwater Maintenance Plan
2
Cad1352
Copies of Stormwater Management Plan
Issue Status Code: A. Preliminary B. Fabrication Only C. For Information D. Bid
E. Construction F. For Review & Comments G. For�lApppero=al_-__[_L..-H- See Remarks
REMARKS: 'lol�`
III c._� ci 19yy I°�t
2807 NEUSE BLVD. BLDG. N5 NEW
cc: Brad L. Suitt
David A. Horton
Signed
CAMy Documents\transCad1352sw.doc
NC 28562 252 672-0304 FAX
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C.T. ClaA

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