SW8060323_HISTORICAL FILE_20060410

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW87Cpd3 Z3
DOC TYPE
❑ CURRENT PERMIT
❑ APPROVED PLANS
HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
2vo(P o4 I i�)
YYYYMMDD

4�0F WAT �y
� r
o �c
April 10, 2006
Mr. Carl Baker, Director
Design Branch, Public Works Division - Camp Lejuene
United States Marine Corps
1005 Michael Road
Camp Lejuene, NC 28547-2521
Subject: Stormwater Permit No. SW8 060323
Watkins Village
High Density Project
Onslow County
Dear Mr. Baker:
Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E. Director
Division of Water Quality
The Wilmington Regional Office received a complete Stormwater Management Permit
Application for Watkins Village on March 29, 2006. 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 060323 dated April 10,
2006, for the construction of the subject project.
This permit. shall be effective from the date of issuance until April 10, 2016, 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 Robert Gordon, or me at [phone].
Sincerely,,-` f )
�..
Edward Beck
Regional Supervisor
Surface Water Protection Section
ENB/rdg: S:1WQSISTORMWATIPERMIT1060323.apr06
cc: Tom Davis, PE, Littlejohn Engineering
Robert Gordon
Wilmington Regional Office
Central Files
North Carolina
Naturally
North Carolina Division of Water Quality 127 Cardinal Drive Extension Phone [phone] Customer Service 1-877-623-674F.
Wilmington Regional Office Wilmington, NC 28405 Fax [phone] Internet: www.ncwateriluality.ong,
An Equal Opportunity/Affirmative Action Employer — 50% Recycled110% Post Consumer Paper

State Stormwater Management Systems
Permit No. SW8 060323
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
The United States Marine Corps - Camp Lejuene
Watkins Village
Onslow County
FOR THE
construction, operation and maintenance of 2 wet detention ponds in compliance with
the provisions of 15A NCAC 2H .1000 (hereafter referred to as the "stormwater rules')
and the approved stormwater management plans and specifications and other
supporting data as attached and on file with and approved by the Division of Water
Quality and considered a part of this permit.
This permit shall be effective from the date of issuance until April 10, 2016, and shall be
subject to the following specified conditions and limitations:
I. DESIGN STANDARDS
This permit is effective only with respect to the nature and volume of stormwater
described in the application and other supporting data.
2. This stormwater system has been approved for the management of stormwater
runoff as described in Section 1.6 on page 3 of this permit. The North pond has
been designed to handle the runoff from 890,087 square feet of impervious area.
The South pond has been designed to handle the runoff from 412,495 square
feet of impervious area.
3. The tract will be limited to the amount of built -upon area indicated on page 3 of
this permit, and per approved plans. The built -upon area for future development
draining to the North pond is limited to 34,900 square feet. There is no built -
upon area allocated for future development draining to the South Pond in this
permit.
4. All stormwater collection and treatment systems must be located in either
dedicated common areas or recorded easements. The final plats for the project
will be recorded showing all such required easements, in accordance with the
approved plans.
Page 2 of 8

State Stormwater Management Systems
Permit No. SW8 060323
5. The runoff from all built -upon area within the permitted drainage area of this
project must be directed into the permitted stormwater control system. Due to
site constraints, the 6' wide trail adjacent to the South pond may bypass the
pond as long as adequate sheet flow treatment of the runoff is provided by
adjacent greenspace.
6. The following design criteria have been provided in the wet detention pond and
must be maintained at design condition:
Units , �
i
�y��> ��Pond #1s
Y yi- k
t_
Drainage Area
Acres
51.6
20.0
Onsite
ft2
1,899,216
871,200
Offsite
ft2
348,480
0
Total Impervious Surfaces
890,087
412,495
Onsite
ft2
778,573
412,495
Offsite
111,514
0
Pond Depth
feet
5.5
5
TSS removal efficiency
%
90
90
Design Storm
inches
1
1
Permanent Pool Elevation
FMSL
13.0
15.0
Permitted Surface Area @PP
ft2
$6,276
30,379
Permitted Storage Volume
ft3
76,796
34,786
Storage Elevation
FMSL
14.24
16.04
Controlling Orifice
"O pipe
4
3
Permanent Pool Volume
ft3
216,800
103,248
Forebay Volume
ft3
55,300
27,191
Maximum Fountain
Horsepower
HP
314
113
Receiving Stream
..�
Wallas e Creek
River Basin
;w
White Oak
Stream Index Number
;'`a'"'
19-20
Classification of Water Body
SB;NSW
II. SCHEDULE OF COMPLIANCE
The stormwater management system shall be constructed in its entirety,
vegetated and operational for its intended use prior to the construction of any
built -upon surface.
2. During construction, erosion shall be kept to a minimum and any eroded areas of
the system will be repaired immediately.
Page 3of8

State Stormwater Management Systems
Permit No. SW8 060323
3. The permittee shall at all times provide the operation and maintenance
necessary to assure the permitted stormwater system functions at optimum
efficiency. The approved Operation and Maintenance Plan must be followed in
its entirety and maintenance must occur at the scheduled intervals including, but
not limited to:
a. Semiannual scheduled inspections (every 6 months).
b. Sediment removal.
C. Mowing and revegetation of slopes and the vegetated filter.
d. Immediate repair of eroded areas.
e. Maintenance of all slopes in accordance with approved plans and
specifications.
f. Debris removal and unclogging of outlet structure, orifice device, flow
spreader, catch basins and piping.
g. Access to the outlet structure must be available at all times.
4. Records of maintenance activities must be kept and made available upon
request to authorized personnel of DWQ. The records will indicate the date,
activity, name of person performing the work and what actions were taken.
5. Decorative spray fountains will be allowed in the stormwater treatment system,
subject to the following criteria:
a. The fountain must draw its water from less than 2' below the permanent
pool surface.
b. Separated units, where the nozzle, pump and intake are connected by
tubing, may be used only if they draw water from the surface in the
deepest part of the pond.
c. The falling water from the fountain must be centered in the pond, away
from the shoreline.
d. The maximum horsepower for a fountain in the North pond is 314
horsepower. The maximum horsepower for a fountain in the South pond
is 113 horsepower.
6. The facilities shall be constructed as shown on the approved plans. This permit
shall become voidable unless the facilities are constructed in accordance with
the conditions of this permit, the approved plans and specifications, and other
supporting data.
7. Upon completion of construction, prior to issuance of a, Certificate of Occupancy,
and prior to operation of this permitted facility, a certification must be received
from an appropriate designer for the system installed certifying that the permitted
facility has been installed in accordance with this permit, the approved plans and
specifications, and other supporting documentation. Any deviations from the
approved plans and specifications must be noted on the Certification. A
modification may be required for those deviations.
8. If the stormwater system was used as an Erosion Control device, it must be
restored to design condition prior to operation as a stormwater treatment device,
and prior to occupancy of the facility.
9. Access to the stormwater facilities shall be maintained via appropriate
easements at all times.
Page 4 of 8

State Stormwater Management Systems
Permit No. SW8 060323
10. The permittee shall submit to the Director and shall have received approval for
revised plans, specifications, and calculations prior to construction, for any
modification to the approved plans, including, but not limited to, those listed
below:
a. Any revision to any item shown on the approved plans, including the
stormwater management measures, built -upon area, details, etc.
b. Project name change.
C. Transfer of ownership.
d. Redesign or addition to the approved amount of built -upon area or to the
drainage area.
e. Further subdivision, acquisition, lease or sale of all or part of the project
area. The project area is defined as all property owned by the permittee,
for which Sedimentation and Erosion Control Plan approval or a CAMA
Major permit was sought.
f. Filling in, altering, or piping of any vegetative conveyance shown on the
approved plan.
11. The permittee shall submit final site layout and grading plans for any permitted
future areas shown on the approved plans, prior to construction.
12. A copy of the approved plans and specifications shall be maintained on file by
the Permittee for a minimum of ten years from the date of the completion of
construction.
13. The Director may notify the permittee when the permitted site does not meet one
or more of the minimum requirements of the permit. Within the time frame
specified in the notice, the permittee shall submit a written time schedule to the
Director for modifying the site to meet minimum requirements. The permittee
shall provide copies of revised plans and certification in writing to the Director
that the changes have been made.
III. GENERAL CONDITIONS
1. This permit is not transferable except after notice to and approval by the Director.
In the event of a change of ownership, or a name change, the permittee must
submit a formal permit transfer request to the Division of Water Quality,
accompanied by a completed name/ownership change form, documentation
from the parties involved, and other supporting materials as may be appropriate.
The approval of this request will be considered on its merits and may or may not
be approved. The permittee is responsible for compliance with all permit
conditions until such time as the Division approves the transfer request.
2. Failure to abide by the conditions and limitations contained in this permit may
subject the Permittee to enforcement action by the Division of Water Quality, in
accordance with North Carolina General Statute 143-215.6A to 143-215.6C.
3. The issuance of this permit does not preclude the Permittee from complying with
any and all statutes, rules, regulations, or ordinances, which may be imposed by
other government agencies (local, state, and federal) having jurisdiction.
4. In the event that the facilities fail to perform satisfactorily, including the creation
of nuisance conditions, the Permittee shall take immediate corrective action,
including those as may be required by this Division, such as the construction of
additional or replacement stormwater management systems.
5. The permittee grants DENR Staff permission to enter the property during normal
business hours for the purpose of inspecting all components of the permitted
stormwater management facility.
Page 5 of 8

State Stormwater Management Systems
Permit No. SW8 060323
6. The permit may be modified, revoked and reissued or terminated for cause. The
filing of a request for a permit modification, revocation and reissuance or
termination does not stay any permit condition.
7. Unless specified elsewhere, permanent seeding requirements for the stormwater
control must follow the guidelines established in the North Carolina Erosion and
Sediment Control Planning and Design Manual.
8. Approved plans and specifications for this project are incorporated by reference
and are enforceable parts of the permit.
9. The permittee shall notify the Division any name, ownership or mailing address
changes within 30 days.
Permit issued this the 10th day of April, 2006. .
NORTH GAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
(or Alan W. Klimek, P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission
Page 6 of 8

State Stormwater Management Systems
Permit No. SW8 060323
Watkins Village
Stormwater Permit No. SW8 060323
Onslow County
Designer's Certification
I, , as a duly registered
in the State of North Carolina, having been authorized to observe (periodically/ weekly/
full time) the construction of the project,
(Project)
for (Project Owner) hereby state that, to the
best, of my abilities, due care and diligence was used in the observation of the project
construction such that the construction was observed to be built within substantial
compliance and intent of the approved plans and specifications.
The checklist of items on page 2 of this form is included in the Certification.
Noted deviations from approved plans and specification:
Signature
Registration Number
Date
SEAL
Page 7 of 8

State Stormwater Management Systems
Permit No. SW8 060323
,M
Certification Requirements:
1. The drainage area to the system contains approximately the permitted
acreage.
2. The drainage area to the system contains no more than the permitted
amount of built -upon area.
3. All the built -upon area associated with the project is graded such that the
runoff drains to the system.
4. All roof drains are located such that the runoff is directed into the system.
5. The outlet/bypass structure elevations are per the approved plan.
6. The outlet structure is located per the approved plans.
7. Trash rack is provided on the outlet/bypass structure.
8. All slopes are grassed with permanent vegetation.
9. Vegetated slopes are no steeper than 3:1.
10. The inlets are located per the approved plans and do not cause short-
circuiting of the system.
11. The permitted amounts of surface area and/or volume have been
provided.
12. Required drawdown devices are correctly sized per the approved plans.
13. All required design depths are provided.
14. All required parts of the system are provided, such as a vegetated shelf,
and a forebay.
15. The required system dimensions are provided per the approved plans.
cc: NCDENR-DWQ Regional Office
Page 8 of 8

OFFICE
ONLY
Date Received Fee Paid Permit Number
�o0 6Z-b�� wa
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):
Marine Corps. Base, Camp Lejetine
2. Print Owner/Signing Official's name and title Spellson legally responsible for facility. and compliance):
�` � 1
�A4 fH t �i°1r �if �P.SIn h 1Ltr.�t,. fl+�.J !�!� [ ll �yy /IVI Stok
V
3. Mailing Address for person listed in item 2 above:
Commanding; General, Marine Carps. Base, 1005 Michael Road
City: Camp Lejeunc State: NC zip; 28547-2521
Telephone Number: ( 910 _L_ _ 451i2581
4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
Watkins Village, Phases I and I1.
5. Location of Project (street address):
Watkins Village
City: Camp Lcieune County: Onslow
B. Directions to project (from nearest major intersection):
From Camp LeJeune main entrance continue on Holcomb Road, ri ht on Brewster Blvd
Laft on Sto Street, -left n Bice to i ! a
7. Latitude: 34°42' Longitude: 77`21' of project
8. Contact person who can answer questions about the project:
Name: Tom Davis Telephone Number. ( 615 1 385-4144
It. PERMIT INFORMATION:
I . Specify whether project is (check one): X New
Renewal Modification
Dorm SWU-101 Version 3.99 Page I of

2. If this application is being submitted as the result of a renewal or modification to an existing permit, list the
existing permit number_ T and its issue date (if known)
3. Specify the type of project (check one):
Low Density X High Density Redevelop General Permit Other
4. Additional Project Requirements (check applicable blanks):
�CAMA Major Sedimentation/Erosion Control 404/401 Permit _NPDES Stormwater
Information on required state permits can be obtained by contacting the Customer Service Center at
1-877-623-6748.
III. PROJECT INFORMATION
1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative
(one to two pages) describing stormwater management for the project.
Wet Ponds will be used to capture the runoff from the 1-inch storm in order to settle
out suspended solids.
2. Stormwater runoff from this project drains to the
3. Total Project Area: 63.6 acres
5. How many drainage areas does the project have? 2
White Oak
River basin.
4. Project Built Upon Area: 43 _%
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.
North Pnnel
Crnith Pend
IBasin.I farinatioria;+ _'
iyY �r a.R wi -des,.
r,��Drainag Area•1 N.� �Ii
_.. ar.i rresa5t�j' za v-:nm
��Di age Area#r2(q ",.
Receiving Stream Name
WALLACE CREEK
WALLACE CREEK
Receiving Stream Class
SB; NSW
SB; NSW
Drainage Area
2,247,696,
SF
Existing Impervious` Area
Proposed Impervious*Area
778,573. SF
412,495 SF
% Impervious` Area (total)
40
47
`.y. kS �t �,�
Impetvrgus, Surface Area n
!-1. V:-tl;4
} 1'
�� ; 1, >. Drainage A'reali r R;; `{'.�
w, K,,� td!�l., �.,»a. Y..ti.: y rr#.sYr,r nary t:Lti
'1 1 tii'�R+rMgf Ys2'cY- 2J Y }1Ya1i-S�L�;
� IY �, Drama Area12� i i ,1
5L. FED, :>4sy. ai+cs. r..,,lF'Y4;rY ..s rY, •'r
On -site Buildings
266,800 SF
186,700 SF
On -site Streets
266,895 SF
102,225 SF
On -site Parking
On -site Sidewalks /Walkways
90,158 SF
42,790 SF
Other on -site /Future Alloc.*
10 420 SF/ 34,900 SF
14,580 SF
Off -site
111,514 SF
---
Total: 890,087 SF
Total: 412,495 SF
Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas,
sidewalks, gravel areas, etc.
"Future Allocation includes Community Center and Amenities
Form SWU-101 Version 3.99 Page 2 of 4

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

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.
Initials
• Original and one copy of the Stormwater Management Permit Application Form
• One cagy of the applicable Supplement Farm(s) for each BMP J'
• Permit application processing fee of $420 (payable to NCDENR)�
• Detailed narrative description of stormwater treatment/management R
• 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, please complete this section.
Designated agent (individual or firm): Tom Davis, Littlejohn Engineering Associates
Mailing Address:_ _ 1935 Twenty Eirst Avenue South
City: Nashville State: TN Zip: 37212
Phone: ( 615 ) 385-4144 Fax: ( 615 ) 385-4020
VIII. APPLICANT'S CERTIFICATION
/j
1, (print or type name of person listed in General Information, item 2)
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 covens ill be rec ed, and that the proposed project complies with the requirements of 15A
NCAC 21-1 .1000, A
Signature:
Date: 3 —197 D :id
Form SWU-101 Version 3.99 Page of

G
L I T T L E J
O H N
E
N G I N E E R I N G A S S O C I A T E S
EN G I NEER I N G
ANN NI
NG
LAN DSCAPE ARCII ITFCTIJ RE LAN 1] SURV EYING
1 9 3 5 TWENTY
- FIRST
AVENUE SOUTH • N A S H V I L L E. TENNESSEE 3 7 2 1 2
P11 ON E 6 1 5
• 385-4
1 44
• FAX [phone] • W W W. LEAI N C. CO\1
TRANSMITTAL
TO: Rob Gordon PH: 910-796-7303 Date: 03/28/06
NC DENR Job No.: LEA ##24235
127 Cardinal Drive Extension _ _ Project: Camp Lejeune
Wilmington, NC 28405 ^� Jacksonville, NC
Regarding: Watkins Village, Phases 1 and 2 - DWQ Stormwater Project Number: SW8 060323
We are sending:
❑X Attached
❑ Under Separate Cover
❑ Copy of Letter
Via:
❑ Mail
❑X Drawings ❑ Computer Disk
�X$
❑ Originals/Reproducibles ❑ Specifications
Hew
❑ Change Order ❑ Other 9002 6 Z
LQUALU
❑ Courier ❑X Express/Overnight Mail
Date
Description IF
Copies
Revised Pond Calculations
I
Revised Phase I Drawings, GI-0.00, CS-4.05, SW-1.01, SW-2.01, SW-3.01
2
Revised Application and Supplement Sheets
1
,y
We are sending:
❑x For Approval
❑ For Review & Comment
❑ For Your Use
❑ As Requested
❑ For Your Record
❑ For Bids Due
Remarks: Attached is our response to the Request for Additional Information dated March 23, 2006 regarding
Stormwater Project No. SW8 060323, Watkins Village, Camp Lejeune, North Carolina.
Please contact our office if you have any further questions.
Copies to: Signed: Matt Carter

21 March 2006
Rob Gordon
NC DENR
127 Cardinal Dr Extension
Wilmington, NC 28405
:MAR 2 3 2006
RE: Watkins Village, Stormwater Management Permit Application
Dear Rob,
Attached is the Stormwater Management Permit Application and the Financial Responsibility Form
If you have any questions, please contact our civil engineer firm, LittleJohn Engineering. Matt
Carter can be reached at 615-324-3957 or [e-mail].
Yours sincerely,
ACTUS LEND LEASE
Derek Veerkamp
Development Manager
Attached:
Stormwater Permit Application Form
Financial Responsibility/Ownership Form
Actus
Lend Lease
Actus Lend Lease LLC
1801 West End Avenue
Suite 1700
Nashville, TN
37203
USA
Telephone
[phone]
Facsimile
[phone]
www.actuslundlease.corn
A Lend Lease Limited
Liability Company

P. 1
FILE MODE OPTION
662 MEMORY TX
COMMUNICATION RESULT REPORT ( MAR.23.2006 12:45PM )
TTI NCDENR WIRO
ADDRESS (GROUP) RESULT PAGE
------------------------------------------------------------------
-------- 916153854020 OK P. 3/3
REASON FOR ERROR
E-1) HANG UP OR LINE FAIL
E-3) NO ANSWER
E-2) BUSY
E-4) NO FACSIMILE CONNECTION
FAX COVER SHEET
Date: March 23, 2006 No. of Pages: 3
To; Tom Davis, PE From., Robert Gordon
Express permitting section
Company: Littlejohn Engineering FAX # [phone]
FAX #: [phone] Phone # [phone]
DWQ Stormwater Project Number: SW8 060303
Project Name: Watkins Village, Phase 1 & 2
MESSAGE:
Attached is the request for additional information for Watkins Village. The
original will be mailed to the applicant and a copy will also be mailed to you.
Please call if you have any questions, Thanks!
The drawings set appears pretty good, Please send 2 copies of any
modified drawing sheets. Also, please include the pond detail sheets in
either the phase 1 or phase 2 set (I guess more appropriate in phase 1), 1
need two copies so I can approve 1. 1 only need 1 copy of the DA map,
=:1 Still have not received signed applicationlsupplaments .

i
FAX COVER SHEET
Date: March 23, 2006 No. of Pages: 3
To: Tom Davis, PE From: Robert Gordon
Express permitting section
Company: Littlejohn Engineering FAX # [phone]
FAX #: [phone] Phone # [phone]
DWQ Stormwater Project Number: SW8 060303
Project Name: Watkins Village, Phase 1 & 2
MESSAGE:
Attached is the request for additional information for Watkins Village. The
original will be mailed to the applicant and a copy will also be mailed to you.
Please call if you have any questions. Thanks!
=> The drawings set appears pretty good. Please send 2 copies of any
modified drawing sheets. Also, please include the pond detail sheets in
either the phase 1 or phase 2 set (I guess more appropriate in phase 1).
need two copies so I can approve 1. 1 only need 1 copy of the DA map.
=> Still have not received signed application/supplements.

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r
A. .b. bYI
March 23, 2006
CDR. Laurence Readal, Public Works Officer
United States Marine Corps
1005 Michael Road
Camp Lejuene, NC 28547-2521
Subject: Request for Additional Information
Stormwater Project No. SW8 060323
Watkins Village
Onslow County
Dear Commander Readal:
Michael F, 1:asley, Governor
William G. Ross lr., Secretary
North Carolina Department ofEnvironment and i fatu:al Resources
Alan W. Klimek, 11,1 . Director
Division of Rater Quality
The Wilmington Regional Office received a Stormwater Management Permit Application for
Watkins Village on March 20, 2006. A preliminary review of that information has determined
that the application is not complete. The following information is needed to continue the.
stormwater review.
1. Please provide an origin:s,gn ture for the application and supplements.
2. Please hand initial wherrected on both the application and supplements.
3. The calculations must e E stamped and signed.
4. Please provide a dime;'& (width) on a drawing sheet for the walkway near the South
Pond on Phase 1..
5. Please verify the building type bu' td,-es
area calculation for both phases. The number &
type of units shown on the dra ' g not match what is listed in the calculations.
Note — 1 was counting off of sheet SW-1.01.
6. It appears the community center allocati n was distributed into the proposed BUA
allocation (buildings, roads, sidewalk tc...) on the application. All future BUA should
be lumped into an allocation lab I as such. Permitting the community center can
occur at a later date via a plan revision.
7. Please include the pond area in the ainage area for each pond. Stormwater
regulations allow this area to be considered pervious when sizing the system.
8. Please address the following concerns about the North Pond:
a. There appears to be inadequate storage/or the 1" storm. The calculations appear to
show that the volume w s sized from an incorrect drainage area.
b. There is a discrepancy permanent pool volume between sheet SW 2.01/ the
supplement (211,617) and theage-storage chart in the calculations (216,800)
C. There is a discrepancy in the forebay volume between the stage -storage chart and
the supplement.
Dnc
NorthCarolina
A'alurally
North Carolina Division of %k`ater Quality 127 Cardinal Drive Extension Phone [phone] Customer Service 1-877-623-6748
Wilmington Regional Office Wilmington, NC 28405 Fax [phone] InLumel: www.ncwatcicRahtv.org
An Equal OpportunllylAfiirmative Action Employer — 50% Recycled110% Post Consumer Paper

Watkins Village
March 23, 2006
Stormwater Permit # SW8 060323
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 5, 2006, 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 lettef. The
request must indicate the date by which, you expect to submit the required information.
The construction of any impervious surfaces, other than a construction entrance under an
approved Sedimentation Erosion Control Plan, is a violation of NCGS 143-215.1 and is subject
to enforcement action pursuant to NCGS 143-215.6A.
Please reference the State assigned project number on all correspondence. Any original
documents that need to be revised have been sent to the engineer or agent. All original
documents must be returned or new originals must be provided. Copies are not acceptable. If
you have any questions concerning this matter please feel free to call me at [phone].
Sincerely,
Q-
. L
'
Robert D. Gordon
Environmental Engineer 11
ENB/RDG: S:IWQSISTORMWATERIADDINFO120061060323mar23
CC' Tom Davis, PE, Littlejohn Engineering
Robert D. Gordon

L I T T L E 1 Q H N E N G I N E E R I N G A S S O C I A T E S
E N G IN E E R I N G PLANN ING LANI)SCAPF ARCHITECTURE. LAND SURVEYING
l 9 3 5 TWENTY - FIRST AVENUE SOUTH • N A S H V I L L E. TENNESSEE 3 7 2 1 2
P H O N E 6 l 5- 3 8 5• 4 1 44 a FAX 6 l 5- 3 8 5- 4 0 2 0 a W W W. L E A I N C. C O M
TRANSMITTAL
To: Cameron Weaver PH: 910-796-7307
NC DEN
127 Cardinal Drive Extension
03/17/06
LEA #24235
Camp Lejeune
Wilmington, NC 28405 Jacksonville, NC
Regarding: Watkins Village Permit Fees
We are sending:
0 Attached
❑ Under Separate Cover
❑ Copy of Letter
Via:
❑ Mail
Date:
Job No
Project
❑X Drawings
❑ Originals/Reproducibles
❑ Change Order
❑ Courier
❑ Computer Disk
❑ Specifications
❑ Other
MAR 2 0 2066
M.
❑ ExpresslOvemight Mail
Date
Description
Copies
Check for $5700
1
Watkins Village Phase 1 Drawings
1
Watkins Village Phase 2 Drawings
1
We are sending:
❑ For Approval
❑ For Review & Comment
❑ For Your Use
❑ As Requested
❑ For Your Record
❑ For Bids Due
Remarks: Attached is a check for $5700 which will cover the express permitting fee of $4000 as well as $1700 for
the 34 acres of Watkins VilIage Phase 1. Please notify us what additional fees will be required for the
Watkins Village Phase 2 permit. if you could please give the attached set of plans to Rob Gordon as per
his request. Thanks for all of vour help.
Copies to: Signed: Matt Carter

L I T T L E
O H N E
N G I N E E R I N G A
S S O C I A T E S
E N G I N E E R I N G
P LA N N INC
LANDSCAPE ARCH ITECTU RE
LAND SURVEYING
l 9 3 5 TWENTY
- FIRST AVENUE SOUTH ■ N A S H V I L L E.
TENNESSEE 3 7 2 1 2
P H O N E 6 1 5-
3 H 5- 4 1 44
• FAX 6 1 5- 3 ?; 5- 4 0 2 0 0
W W W. L E A I N C. C O NI
To: Rob Gordon
NC DENR
127 Cardinal Drive Extension
TRANSMITTAL
Pit- GM-706-711112
03/09/06
LEA #24235
Camp Lejeune
Wilmington, NC 28405 Jacksonville, NC
Regarding: Watkins Village, Phases I and 2
We are sending:
❑X Attached
❑ Under Separate Cover
❑ Copy of Letter
Via:
❑ Drawings
Date:
Job No.
Project:
❑ Originals/Reproducibles
❑ Change Order
❑ Courier
❑ Computer Disk
❑ Specifications
❑ Other
❑X Express/Overnight Mail
LDate
Description
Copies
Permit Application Form and Wet Detention Basin Supplements (2)
1
Project Narrative
l
Pond Calculations (Volume, Stage -Storage Charts, Impervious Area)
1
Drawings (Phases l and 2)+ (0jTS
1
We are sending:
FRI For Approval
❑ For Review & Comment
❑ For Your Use
❑ As Requested
❑ For Your Record
❑ For Bids Due
Remarks: Application and Plans scheduled for review Monday, March 13 and Tuesday, March 14.
Signed Originals of the Application Form and Supplements will be delivered Monday or Tuesday (3113 or 3/14)
Please feel free to contact me if you have any questions or require any further information.
Copies to:
Signed: Tom Davis
MAR 2 0 2006
BY:

�J "3 ,
NlCDENR I 0 0 0
North Carolina Department of Environment and Natural Resources
127 Cardinal chive, Wilmington NC; 28405 (910) :395•:4900 FAX [phone] IQ
7 (
Request for Express (Permit Review
J�
FILL-IN all information below and CHECK required Permit(s).
FAX or email to [e-mail] along with a narrative and vicinity map of the project location.
Projects must be submitted by 9:00 A.M. of the review date, unless prior -arrangements are made.
APPLICANT Name Commander Lawrence Readal, Public Works Officer
Company Commanding General, Marine Corps. Base, Camp Lejeune
Address_ 1005 Michael Road Cty/State_Camp Lejeune; NC Zip 28547-2521 County Onslow
Phone [phone] Fax Email
PROJECT Name Watkins Village, Camp Lejeune Marine Corps Base
PROJECT SYSTEM(S) TRIBUTARY TO Wallace Creek (STREAM NAME) White Oak RIVER BASIN
ENGINEER/CONSULTANTThomas J. Davis, PE
Company Littlejohn Engineering Associates
Address 1935 Twenty -First Avenue South City/Stale Nashville, TN Zip 37212County Davidson
Phone [phone] Fax [phone] Email [e-mail]
State or National Environmental Policy Act (SEPA, NEPA) - EA or EIS Required ❑ Yes Z No
❑ STREAM ORIGIN Determination;_ 4 of stream calls; Stream Name
® STORMWATER ❑ Low Density High Density -Detention Pond ❑ High Density -other
Wetlands MUST be addressed below ❑ Low Density -Curb & Gutter ❑ High Density -Infiltration ❑ Off Site
❑ COASTAL ❑ Excavation & Fili ❑ wBridges & Culverts ❑ Structures Information
MANAGEMENT ❑ Upland Development ❑ Marina Development ❑ Urban Waterfront
LAND QUALITY ® Erosion and Sedimentation Controi Plan with _65 _ acres to be disturbed.
WETLANDS (401) Wetlands on Property ® Yes ❑ No Isolated Wetlands on Property ❑ yes ❑ No
Check all that apply Wetlands Will Be Impacted ❑ Yes `rj No Wetland Impacts: Acre('s)
Wetlands Delineation has been completed 0 Yes ❑ No ❑ Buffers Impacted: Acre(s)
USACOE Approval of Delineation completed ® Yes ❑ No
404 Application in process w1USAGOE ❑Yes ®No l Permit received from USACE ❑Yes ❑No
401 Application required ❑Yes ❑ No If Yes, ❑ Regular ❑ Express
Additional fees, not; to exceed 50% of the original Express Review permit application fee, may be charged for
subsequent reviews due to the insufficiency of the permit applications.
SUBMITTAL DATES:
SW
CAMA _
LOS
401—__--
For DENR use only
Fee Split for multiple permits:,
$
$
Total Fee Amount $

11r(jje:ct Nart-wive: Watkins Village
The Watkins 1%illage neighborhood Lain be found oil the main side of' Marine Carps Base
Camp lacjelutc; off of 1 jhway 24 near ,lacksonviIIe, North C;trolina ill Ons€ow Co univ-
The proposed project calls i'c)r rcdeveloprnent of the existing Watkins Village
neighborhood as Nvell as expansion of -the nciglilwrhood inlet undeveloped, udj,iccnt kund.
Phase l cif the project requires construction of 53 now duplex huildings 0 26 homes) on
uuiTently undeveloped land. 1n addition. Phasc 1 will also includ(: construction of the:
required wet detention ponds to hamUe stonliwater rutxtf lum Phase 2 as well as Phase
I. Please 2 construction consists of denaoh6on Of 188 e06111; units Und Constructirin Of'
126 new units (53 duplex buildings)- "Ode roads in Phase I M be all nuw
construction. certain existing roads in Plume 2 will be repaved and reused in the updated
neighborhood. Existing wetlands wurc delineated in the Phase I area of Watkins Village.
Cabe wis taken to t:n!itIN that net new construction v,,ould interfere ),vith these wetlands.
Upon completion,. Watkins Village will contain 126 duplex buildings housing 252
t niHics.
The proposed neighborhood Will have curh and gutter along all streets and will rely on a
discrete swnnwatcr collection system to convey stormwamr rtuioff. Curb inlets ',Ind catch
basins will direct nmoffthrou h an unt€ogmund piping system to wet detention basins
located on -site. Based on these conditions, the project will qualify as High Density
Devc oynets and will be subject to water quality requirements as suc}t.
Water quality requlrcments arc to he satrshed ushig two wet detention basins. Both
basins will be constructed as part of Phase 1, but will surve the entire Watkins Village
neighborhood (Phases 1 and 2). The South fond is located in the southern portion of
1'llase I and will provide water quality fior-thc majority of the new units in Phase 1. The
North Pond is located in a northwesterly direction trom the South Pond and \ ill provide
kviter quality for the remainder of Phase; 1 as "A as Al of Phase 2 and the proposed
comnwnhy center and amenities Owed west of the pond. Neither the two hands nor
their respective Outlet structures will encroach on the delineaitcd wetland; in the area.
Both wet detention basins haavc been dcsir;nt;d in accordance with State ot'titorth Carolina
requirements and will provide drawdown of t e I -inch sto nl w4hin 2-5 days.
Calculations as well us draina,c area exhibits artcl other requirements will he included in
thestorniwxer permit application submittal.
IC

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Projection is UTM Zone 18 NAD83 Datum G=- 1. 339
1 2/8/2006

Project Narrative: Watkins Village
The Watkins Village neighborhood can be found on the main side of Marine Corps Base
Camp Lejeune off Highway 24 near Jacksonville, North Carolina in 4nslow County.
The proposed project calls for redevelopment of the existing Watkins Village
neighborhood as well as expansion of the neighborhood into undeveloped, adjacent land.
Phase 1 of the project consists of construction of 53 new duplex buildings (126 homes)
on currently undeveloped land. in addition, Phase I will also include construction of the
required wet detention ponds to handle stormwater runoff from Phase 2 as well as Phase
1. Phase 2 construction encompasses demolition of 188 existing units and construction of
126 new units (53 duplex buildings). In addition, the long range plan also calls for the
construction of a community center building including associated amenities such as
tennis and basketball courts in another phase. While roads in Phase 1 will be all new
construction, certain existing roads in Phase 2 will be repaved and reused in the updated
neighborhood. Existing wetlands were delineated and certified in the Phase 1 area of
Watkins Village. Care was taken to ensure that no new construction would interfere with
these wetlands. Upon completion, Watkins Village will contain 126 duplex buildings
housing 252 families.
Due to the fact design of the community center and amenities has not begun; an
impervious area allocation will be assumed and used in calculations for the wet detention
basin. The estimated impervious area is derived from a preliminary site plan. While the
plan is likely to change, the amount of impervious area is expected to remain
approximately equal to the allocated amount.
The proposed neighborhood will have curb and gutter along all streets and will rely on a
discrete stormwater collection system to convey stormwater runoff. Curb inlets and catch
basins will direct runoff through an underground piping system to wet detention basins
located on -site. Based on these conditions, the project will qualify as High Density
Development and will be subject to water quality requirements as such.
Water quality requirements are to be satisfied using two wet detention basins. Both
basins will be constructed as part of Phase 1, but will serve the entire Watkins Village
neighborhood (Phases I and 2 as well as the community center). The South Pond is
located in the southern portion of Phase 1 and will provide water quality for the majority
of new units in Phase 1. The North Pond is located in a northwesterly direction from the
South Pond and will provide water quality for the remainder of Phase 1 as well as all of
Phase 2 and the proposed community center and amenities located west of the pond.
Neither the two ponds nor their respective outlet structures will encroach on the
delineated wetlands in the area. Both wet detention basins have been designed in
accordance with State of North Carolina requirements and will provide drawdown of the
1-inch storm within 2-5 days. Calculations as well as drainage area exhibits and other
requirements will be included in the stormwater permit application submittal.
Certain areas of the trail system located along the southern portion of Phase 1, adjacent to
the South pond, as well as trails associated with the community center will be allowed t6A$
900Z 0 9 8M

bypass the wet ponds. Designing additional storm drainage to direct the runoff from
these areas to the ponds would require disruption of well -wooded, well -draining areas
and would create more problems than it would solve. In addition, as the water drains to
the south, the woods continue and it is almost'/ of a mile until the water reaches a named
body of water (Wallace Creek). The mature, dense growth of the woods as well as soils
conducive to infiltration (sandy soils) are two factors which lead to the conclusion that
allowing approximately 5,000 SQ-FT of impervious area to runoff the site in a diffuse,
non -concentrated manner will not create any water quality problems.

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http://www.topozone.com/print.asp?z=18&n=3842288.72697512&e=284757.490155935&... 3/23/2006

A.
Camp Lejeune
Camp Lejeune, North Carolina
Pond Design Calculations
Watkins Village
CEIv��
MAR 2 9 2006
BY:
March 28, 2006
Prepared for:
Actus Lend Lease
1801 West End Avenue, Suite 750
Nashville, TN 37203
[phone] (ph)
[phone] (fax)
Prepared by:
Littlejohn Engineering Associates
1935 Twenty -First Avenue South
Nashville, TN 37212
[phone] (ph)
[phone] (fax)
,`�;�o P R OF�•S�i
CPESC ,,C) ,
Thomas J. Davis
No. 2901 GO, .
f0,1�g1�,�j-SUfl'•�

CAMP LEJEUNE
WATKINS VILLAGE
POND DESIGN CALCULATIONS
TABLE OF CONTENTS
Impervious Area Calculations
Draining to North Pond:
Phase 1 1
Phase 2 2
Off -Site 3
Community Center (Future Allocation) 4
Draining to South Pond:
Phase 1 5
North Pond
North Pond Calculations 6
North Pond Stage -Storage Charts 7
South Pond
South Pond Calculations S
South Pond Stage -Storage Charts 9
March 28, 2006

Bui ldincis/Driveways/W alkways:
Roads:
Watkins Village - Phase 1
Impervious Area Draining to North Pond
Building Tyoe:
# Units
Building Area/Unit
Total Building Area
Driveway Area/Unit
Total Driveway Area
Walkway Area/Unit
Total Walkway Area
1
3
3,200
9,600
1,300
3,900
200
600
V
1
4,300
4,300
1,500
1,500
150
150
Vll
3
3,500
10,500
1,200
3,600
150
450
VilI
6
3,500
21,000
1,400
8,400
150
900
IX
0
3,500
0
2,100
0
300
0
X
0
3,200
0
1,400
0
300
0
XII
0
4,500
0
1,500
0
150
0
Building Area Phase 1 = 45,400 5Q-FT
Driveway Area Phase 1 = 17,400 SO -FT
Walkway Area Phase 1 = 2,100 SQ-FT
Name
Width
Length (FT)
Area (SO. -FT)
On -Street Parkin
Road "A"
29
540
15,660
0
Lift Station
Access Rd
12
365
4,380
0
Sidewalks:
Phase 1 Road Areas =
Length: 1,566 FT
Width: 4 FT
Phase 1 Sidewalk Area =
Lift Station Built Upon Area =
Phase 1 Impervious Area
Draining to North Pond =
20,040 50-FT
6,264 SQ-FT
400 SQ-FT
91,604 SO -FT =
2.10 AC
Total New Impervious Area
Draining to North Pond = 778,573 SO -FT = 17.87 AC

Bu i Id i nys/D riveways1W al kways:
Roads:
Watkins Village - Phase 2
Impervious Area Draining to North Pond
Building T
# Units
B it in Ar nit
TotaLB_uildinu Arejj
Driveway re it
Total Qdveway AreaWalkway
Area/UnitArea/Unit
Tg121 W Ikw Ar a
I ' 1
10
3,200
32,000
1,300
13,000
200
2,000
V ✓/
3
4,300
12,900
1,500
4,500
150
450
VI v
12
3,500
42,000
1,200
14,400
150
1,800
Vlll J.
8
3,500
28,000
1,400
11,200
150
1,200
IX 1
9
3,500
31,500
2,100
18,900
300
2,700
X 1
15
3,200
48,000
1,400
1 21,000
300
4,500
Xll J
6
4,500
27,000
1,500 1
9,000
150
900
Building Area Phase 2 = 221,400 SO -FT
Driveway Area Phase 2 = 92,000 So -FT
Walkway Area Phase 2 = 13,550 SQ-FT
Name
Width
Length (Fr)
Area (SO. -FT)
On -Street Parkin
Bicentennial
34
1,730
57,955
0
Virginia
29
940
27,260
0
Florida
29
875
25,375
0
Road °A"
29
1,835
53,215
0
Road'B'
1 29
1 1,490
43,210
1 0
Alley "A'
16
1 1,720
27,520
0
Alley "B°
16
425
6,800
0
Alley "C"
16
345
5,520
0
Sidewalks:
Trails:
Pnase 2 HOaCJ Areas = 245,855 5Q-FT
Length: 17,061 FT
Width: 4 FT
Phase 2 Sidewalk Area = 68,244 SO -FT
Length: 1,670 FT
Width: 6 FT
Phase 2 Trail Area = 10,020 SO -FT
Phase 2 Impervious Area Draining to
North Pond = 652.069 SQ-FT = 14.97 AC
M

Watkins Village - Phase 2 - Off -Site
Impervious Area Draining to North Pond
Buildings/Driveways/Walkways:
B it in F e:
# Units
Total Building Affia
TQWI Driveway Area
North Side of Street
12
14,473
1
7,027
South Side of Street
15
33,457
8,763
Building Area Phase 2 = 47,930 SO -FT
Driveway Area Phase 2 = 15,790 SO -FT
Roads:
Name Width I Length (FT) I Area (SO. -FT) I On -Street
Delaware 28 1 1,522 1 42,616 1 0
Off -Site Road Areas = 42,616 SO -FT
Sidewalks:
Length: 1,241 FT
Width: 4 FT
Off -Site Sidewalk Area = 4,964 SO -FT
Total Existing Impervious Area Draining to
11 North Pond = 111,300 SO -FT = 2.56 AC
3/ 10/06

Watkins Village - Community Center
Impervious Area Draining to North Pond
Building Area = 6,100 SO FT
Sidewalks/Walkways = 10,000 SO FT
Pool/Wet Deck Area = 2,300 SO FT
Basketball/Tennis Courts = 16,500 SO FT
Community Center Impervious
Area Draining to North Pond = 34,900 SO -FT = 0.80 AC*
*Area to be denoted as Future Allocation for application purposes

Buildings/Driveways/Walkways:
Roads:
Watkins Village - Phase 1
Impervious Area Draining to South Pond
Buildino Tyne:
# Units
Building Area/Unit
Total Building Area
Driveway Area/Unit
Total Drivewav Area
Walkway Area/Unit
-total Walkway Area
1 ✓
13
3,200
41,600
1,280
16,640
190
2,470
V
2
4,300
8,600
1,480
2,960
140
280
VII ✓
10
3,500
35,000
1,180
11,800
140
1,400
Vill ✓
11
3,500
38,500
1,280
14,080
140
1,540
IX
0
1 3,500
0
1 2,080
1 0
300
0
X
0
3,200
0
1,380
0
300
1 0
XII ✓
14
4,500
63,000
1 1,480
1 20,720
140
1,960
Building Area Phase 1 = 186,700 SQ-FT
Driveway Area Phase 1 = 66,200 SQ-FT
Walkway Area Phase 1 = 7,650 SQ-FT
Name
Width
Length (FT)
Area (SO. -FT)
On -Street Parkin
Road "B"
29
225
6,525
0
Road "C"
29
1,100
31,900
0
Road "D"
29
650
18,850
0
Road "E"
29
675
19,575
0
Road "F"
1 29
1 875
1 25,375
0
Sidewalks:
Trails:
Phase 1 Road Areas = 102,225 SQ-FT
Length: 8,785 FT
Width: 4 FT
Phase 1 Sidewalk Area = 35,140 SO -FT
Length: 2,430 FT
Width: 6 FT
Phase 1 Trail Area = 14,580 SO -FT
Phase 1 Impervious Area Draining to
South Pond = 412,495 SO -FT = 9.47 AC

Watkins Village
North Pond Calculations
Drainaae Area:
Off -Site Drainage Area = 8.0 AC
WV North Pond Drainage Area = 43.6 AC
Total Drainage Area = 51.6 AC
Impervious Area = 17.87 AC
Existing (Off -Site) Impervious Area = 2.56 AC
Percent impervious = 40%
Permanent Pool Depth = 5.5-FT Pond Bottom Elev. = 7.5 Permanent Pool Elev. = 13.0
Pond Surface Area:
SA/DA Ratio = 2.5 (From NC DENR BMP Manual SA/DA Ratios for Coastal Counties)
Surface Area Required = (2.5/100)*51.60 AC = 1.29 AC = 56,192 SO -FT
Surface Area Provided = 56,276 SO -FT
Volume to be Controlled:
Volume (V) = Design Rainfall * R_v * Drainage Area
R_v = 0.05+0.009*1 1= Percent Impervious = 40
R_v = .41 IN/IN
Design Rainfall = 1-IN
V = (1-IN) * 0.41 IN/IN * 1 FT/121N * 51.6 AC
V = 1.76 AC -FT
76,796 CU-FT
Drawdown Time Calculations:
Temporary Pool Depth:
14.24-13.00 = 1.24 FT
Average Head on Orifice:
h = 0.62 FT
Orifice Equation =
Q = C_d *
A * (2*g*h)^1/2
C d =
0.6
3-IN ORIFICE
A =
0.049 SO -FT
Q =
0.19 CFS
V/Q =
412,648 SECONDS
-
4.78 DAYS
4-IN ORIFICE
A =
0.087 SO -FT
Q =
0.33 CFS
V/Q =
232,115 SECONDS
=
2.69 DAYS
Therefore a 4-IN
Orifice will provide acceptable drawdown time.
03/28/06

f,
Watkins Village North Pond
Stage -Storage Tables
SOUTH POND STAGE -STORAGE TABLE
ELEVATION
(FT)
SURFACE AREA
(SQ FT)
ELEV. VOLUME
CU FT)
SUB -VOLUME
(CU FT)
SURFACE AREA
(AC)
7.50
0
0
0.00
8.00
29,772
4,962
4,962
0.68
9.00
34,418 132,067
37,029 10.79
10.00
39,401
36,881
73,910
0.90
11.00
44,644
41,995
115,906
1.02
12.00
50,491
47,538
163,443
1.16
13.00
56,276
53,357
216,800
1.29
14.00
65,017
60,594
277,394
1.49
15.00
70,960
67,967
345,361
1.63
Forebay Volume as a Percentage of Total Pond Volume = 26%
The following illustrates the stage -storage table broken down into forebay stage -storage and main pond
stage -storage
MAIN BASIN STAGE STORAGE TABLE
ELEVATION
(FT)
SURFACE AREA
SQ FT)
ELEV. VOLUME
(CU FT)
SUB -VOLUME
(CU FT)
7.50
0
0
8.00
23,078
3,846
3,846
9.00
26,198
24,622
28,468
10.00
29,550
27,857
56,325
11.00
33,044
31,281
87,606
12.00
37,034
35,020
122,626
13.00
40,734
38,869
161,495
FOREBAY STAGE -STORAGE TABLE
ELEVATION
(FT)
SURFACE AREA
SQ FT)
ELEV, VOLUME
CU FT)
SUB -VOLUME
CU FT)
7.50
0
0
0
8.00
6,694
1,116
1,116
9.00
8,220
7,444
8,560
10.00
9,851
9,023
17,583
11.00
11,600
10,714
28,296
12.00
13,457
12,517
40,813
13.00
15,542
14,487
55,300
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8
Watkins Village
South Pond Calculations
Drainaae Area:
Off -Site Drainage Area = 0.0 AC (--% Impervious)
WV South Pond Drainage Area = 20.0 AC
Total Drainage Area = 20.0 AC
Impervious Area = 9.47 AC
Percent Impervious = 47%
Permanent Pool Depth = 5-FT Pond Bottom Elev. = 10.0 Permanent Pool Elev. = 15.0
Pond Surface Area:
SA/DA Ratio = 3.29 (From NC DENR BMP Manual SA/DA Ratios for Coastal Counties)
Surface Area Required = (3.29/100)*20.0 AC = 0.66 AC = 28,662 SO -FT
Surface Area Provided = 30,379 SO -FT
Volume to be Controlled:
Volume (V) = Design Rainfall * R_v * Drainage Area
R_v = 0.05+0.009*1 1 = Percent Impervious = 47
R_v = .473 IWIN
Design Rainfall = 1-IN
V = (1-IN) * 0.473 IN/IN * 1 FT/121N * 20.0 AC
V = 0.79 AC -FT
34,340 CU-FT
Drawdown Time Calculations:
Temporary Pool Depth: 16.04-15 = 1.04 FT
Average Head on Orifice: h = 0.52 FT
Orifice Equation = Q = C_d * A * (2*g*h)^i/2
C d = 0.6
3-IN ORIFICE A = 0.049 SQ-FT
O = 0.17 CFS
V/Q = 201,480 SECONDS
2.33 DAYS
Therefore a 3-IN Orifice will provide acceptable drawdown time.
03/28/06

0
Watkins Village South Pond
Stage -Storage Tables
SOUTH POND STAGE -STORAGE TABLE
ELEVATION
(FT)
SURFACE AREA
SQ FT)'
ELEV. VOLUME
(CU FT)
SUB -VOLUME
(CU FT)
SURFACE AREA
(AC)
10.00
0
0
0.00
10.01
12,545
42
42
0,29
11.00
15,498
13,856
13,897
0.36
12.00
18,682
17,065
30,963
0.43
13.00
22,096
20,365
51,328
0.51
14.00
25,738
23,894
75,222
0.59
15.00
30,379
28,026
103,248
0.70
16.00
35,550
32,931
136,179
0.82
17.00
38,220
36,877
173,056
0.88
Forebay Volume as a Percentage of Total Pond Volume = 26%
The following illustrates the stage -storage table broken down into forebay stage -storage and main pond
stage -storage
MAIN BASIN STAGE STORAGE TABLE
ELEVATION
(FT)
I SURFACE AREA I
(SQ FT)
ELEV. VOLUME
ICU FT}
I SUB -VOLUME
(CU FT)
10.00
0
0
10.01
9,845
33
33
11,00
11,840
10,719
10,752
12.00
13,945
12,878
23,630
13.00
16,161
15,039
38,669
14.00
18,488
17,311
55,981
15.00
21,698
20,072
76,052
FOREBAY STAGE -STORAGE TABLE
ELEVATION
(FT)
SURFACE AREA
(SQ FT)
I ELEV. VOLUME
(CU FT)
I SUB -VOLUME
(CU FT)
10.00
0
0
10.01
2,700
9
9
11.00
3,658
3,135
3,144
12.00
4,737
4,186
7,330
13.00
5,935
5,325
12,655
14.00
7,250
6,582
19,236
15.00
8,681
7,955
27,191
1 of 1