SW8990913_HISTORICAL FILE_20030806

STORMWATER DIVISION CODING SHEET
POST-CONSTRUCTION PERMITS
PERMIT NO. SW8 '\°l Oq \3
DOC TYPE ❑ CURRENT PERMIT
❑ APPROVED PLANS
® HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE 2- U-6 0 g O�
YYYYMMDD

w A rE,� Michael F.Easley,Governor
William G.Russ Jr.,Secretary
North Carolina Department of Environment and Natural Resources
' r Alan W.Klimek,Y.E. Director
—I Division of Water Quality
Y Coleco H.Sullins,Deputy Director
Division of Water Quality
August 6, 2003
Mr. Sean Scanlon, Vice President
Coastal Communities, Inc.
131 ocean Blvd. West
Holden Beach, NC 28462
Subject: Approved Plan Revision
Seascape at Holden Plantation
Stormwater Project No. SW8 990913
Brunswick County
Dear Scanlon:
The Wilmington Regional Office received a plan revision for Stormwater Management
Permit Number SW8 990913. The revisions include the addition of a second boat ramp. All
other portions of the project (as described in the CAMA Major Modification) that are subject to
the State Stormwater Rules were previously permitted . It has been determined that a formal
permit modification is not required for the proposed changes. We are forwarding you an
approved copy of the revised plans for your files. Please add the new approved plan sheer to your
files.
Please be aware that all terms and conditions of the permit issued on April 23, 2001,
remain in full force and effect. Please also understand that the approval of this revision to the
approved plans for the subject State Stormwater Permit is done on a case-by-case basis. Any
other changes to this project must be approved by this office prior to construction. If it is
determined that the proposed revision will require a modification to the permit, you will be
notified.
If you have any questions concerning this matter, please do not hesitate to call me at (910)
395-3900.
Sincerely,
Noelle Lutheran
Environmental Specialist
RSS\nml: S:\WQS\STORMWAT\REVISION\990913.AUG
cc: Delaney Aycock, Brunswick County Building Inspections
Andy Mills, Cape Fear Engineering
Doug Huggett, DCM
Wilmington Regional Office
Central Files
N.C.Division of Water Quality 127 Cardinal Drive Extension [phone] Customer Service =��A_
Wilmington Regional Office Wilmington,NC 28405 [phone] Fax [phone] NCDMA

:OFFICE`USE ONLY A ... •. - -
Date Received Fee Paid Permit Number
0 2y • 2? Q —
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. Applicant's name (specify the name of the corporation, individual, etc. who owns the project):
Coastal Communities, Inc.
2. Print Owner/Signing Official's name and title (person legally responsible for facility and
compliance):
Sean Scanlon, Project Coordinator/ Vice President
3. Mailing Address for person listed in item 2 above:
13 1 Ocean Blvd. West
City: Holden Beach State: NC Zip: 284G2
Telephone Number: [phone]
4. Project Name (subdivision, facility, or establishment name - should be consistent with project name
on plans, specifications, letters, operation and maintenance agreements, etc.):
Seascape at Holden Plantation
5. Location of Project(street address):
Stone Chimney Road (5R I I 1 9)
City: Holden Beach County: Brunswick
6. Directions to project(from nearest major intersection):
Approx. 3/4 of a mile south of the Sabbath Home road and Stone Chimney road intersection across from the
Entrance to the Lockwood Folly Golf Course Commumty
7. Latitude: N 33003'48" Longitude: W G 1 034'4 1 " Of project
8. Contact person who can answer questions about the project:
Name: Sean Scanlon Telephone Number: (9 1 0) 842-4939
II. PERMIT INFORMATION:
1. Specify whether project is(check one): New Renewal X Modification
2. If this application is being submitted as the result of a renewal or modification to an existing permit, list the
existing permit number 5W8 0009 1 3-Mod And its issue date (if known) 23 April 200 1
Form: SWU-101 Version3.99 Page 1 of

3. Specify the type of project(check one):
X Low Density High Density Redevelop General Permit Other
4. Additional Project Requirements (check applicable blanks):
X CAMA Major X Sedimentation/Erosion Control 404/401 Permit NPDES Stormwater
Information on required state permits can be obtained by contacting the Customer Service Center at
1-877-623-6747.
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.
5tormwater will be conveyed to 5: 1 vegetative 5wale5 at a minimum lenclth of 1 00' prior to discharging
Into wetland areas, amenity ponds and the proposed marina Site.
2. Stormwater runoff from this project drains to the Lumber River basin.
3. Total Project Area: 222. 13 acres 4. Project Built Upon Area: 24.97 %
5. How many drainage basins does the project have? 1
6. Complete the following information for each drainage area. If there are more than two drainage areas in the
project, attach an additional sheet with the information for each area provided in the same format as below.
Basin Information I Drainage Area I Drainage Area 2
Receiving Stream Name Atlantic Intracoastal Waterway
Receiving Stream Class 5A
Drainage Basin Area 222. 13 ac.
Existing Impervious* Area 0
Proposed Impervious* Area 55.47 ac.
% Impervious* Area (total) 24.97
Impervious* Surface Area Drainage Area I Drainage Area 2
On-site Buildings 36.0 I ac.
On-site Streets 14.3 1 ac.
On-site Parking 0.24 ac.
On-site Sidewalks 1 .93 ac.
Other on-site(Contingency) 2.9b ac.
Off site 0
Total: 55.47 ac. Total:
Impervious area is defined as the built upon area including, but not limited to,buildings, roads,parking areas,
sidewalks,gravel areas,etc.
7. How was the off-site impervious area listed above derived? Topographic information
Form: SWU-101 Version 3.99 Page 2 of 4

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 clanged 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.
"Lots 1-20) =201 @ 6,000 5f; Lots 202-3 1745KIP; Lots 3 18-380=72 @ 5,000 5f;
3. Swales shall not be filled in,piper!, or altered except as necessary to provide driveway crossings.
4. Built-upon area in excess area of the permitted amount requires a suite stormwater management permit modification prior to
construction.
5. All permitted runofffrorn 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 required covenants will be binding on all parties and
persons claiming under them, that they will run the land, that the required covenants cannot be changed or
deleted without concurrence ti om 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-102 Infiltration Basin Supplement
Form SWU-102 Low Density Supplement
Form SWU-102 Curb Outlet System Supplement
Form SWU-102 Off-Site System Supplement
Form SWU-102 Underground Infiltration Trench Supplement
Form SWU-102 Neuse River Basin Supplement
Form SWU-102 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.
1. 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 373 S�
• One copy of the applicable Supplement Form(s) for each BMP SSS P
• Permit application processing fee of $420 (payable to NCDENR) SBP
• Detailed'narrative description of stormwater treatment/management SIIP
• Two copies of plans and specifications, including: s¢(Q
- Development/Project name
-Engineer and firm
-Legend
-North Arrow
- Scale
- Revision number and date
- Mean high water line
- Dimensioned property/project boundary
-Location map with named streets or NCSR numbers
-Original contours, proposed contours, spot elevations, finished floor elevations
-Details of roads, drainage features, collection systems, and stormwater control measures
- Wetlands delineated, or a note on plans 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): Cape Fear Engineering
Mailing Address: 15 1 Poole Road, 5uite 100
City: Belville State: NC Zip: 25451
Phone: [phone] Fax: [phone]
VIII. APPLICANT'S CERTIFICATION
1, (print or type name of person listed on General Information, item 2) Sean Scanlon
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 2H .1000.
Signature: �. Date: 7/ oz
Form: SWU-101 Version 3.99 Page 4 of 4

Permit No. AC46
(to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
LOW DENSITY SUPPLEMENT
This form may be photocopied for use as an original
A low density project is one that meets the appropriate criteria for built upon area and transports stormwater
runoff primarily through vegetated conveyances. Low density projects should not have a discrete stormwater
collection system as defined by 15A NCAC 2H .1002(18). Low density requirements and density factors can
be found in 15A NCAC 2H .1005 through .1007.
I. PROJECT INFORMATION
Project Name Seascape at Holden Plantation
Contact Person : Sean Scanlon Phone Number: 910-842-4939
Number of Lots: 273 Allowable Built Upon Area Per Lot*: 72@5000;201 @6000;
*If lot sizes are not uniform, attach a table indicating the number of lots, lot sizes and allowable built upon
area for each lot. The attachment must include the project name, phase, page numbers and provide area
subtotals and totals.
II. BUILT UPON AREA
See the Stormwater Management Permit Application for specific language that must be recorded in the deed
restrictions for all subdivisions.
For uniform lot sizes, complete the following calculations in the space provided below where:
• SA Site Area - the total project area above Mean High Water. Wetlands may be excluded when the
development results in high density pockets.
• DF Density Factor- the appropriate percent built upon area dived by 100.
• RA Road Area - the total impervious surface occupied by roadways.
• OA Other Area - the total area of impervious surfaces such as clubhouses, tennis courts, sidewalks, etc.
• No. Lots - the total number of lots in the subdivision.
• BUA/Lot - the computed allowable built upon area for each lot including driveways and impervious
surfaces located between the front lot line and the edge of pavement.
Fonn: SWU-104 Rev 3.99 Pagel of 2

(SA x DF) - RA - OA = BUA
No. Lots . Lots
Calculation:
(222.13ac. x 0.25 %)— 14.31 ac. — 5.21 ac. = 36.01 ac. = 1,568,711 SF
273 273 273 lots
Lots 1-201: 201@ 6,000 SF=1,206,000 SF t TOTAL: 1,566,000 SF on 273 LOTS
Lots 318-389: 72 @ 5,000 SF=360,000 SF J
III. REQUIRED ITEMS CHECKLIST
Initial in the space provided to indicate that the following requirements have been met and supporting
documentation is provided as necessary. If the applicant has designated an agent on the Stonmvater
Management Permit Application Form, the agent may initial below.
Applicants Initials
l3 P a. A 30 foot vegetative buffer is provided adjacent to surface waters. Projects in the Neuse
River basin may require additional buffers.
Tan b. Deed restriction language as required on form S WU-101 shall be recorded as a restrictive
covenant. A copy of the recorded document shall be provided by DWQ within 30 days of
platting and prior to sale of any lots.
"S OF c. Built upon area calculations are provided for the overall project and all lots.
6P d. Project conforms to low density requirements within the ORW AEC (if applicable).
[15A NCAC 2H .I007(2)(b)]
Form: SWU-104 Rev 3.99 Page 2 of 2

Permit No.
(to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
CURB OUTLET SYSTEM SUPPLEMENT
FOR LOW DENSITY DEVELOPMENT WITH CURB AND GUTTER
This fort;may be photocopied for use as an original
DWQ Stormwater Management Plan Review:
A complete stormwater management plan submittal includes a stormwater management permit application, a
curb outlet system supplement, a low density supplement, design calculations, and plans and specifications
showing all stormwater conveyances and curb outlet details.
I. PROJECT INFORMATION
Project Name : Seascape at Holden Plantation
Contact Person: Sean Scanlon Phone Number: (9 10) 846- 1000
Curb outlets to (check one): 4 Swale Vegetated Area
II. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the North Carolina Administrative Code Section 15A
NCAC 2H .1008.
Initial in the space provided to indicate that the following design requiremcuts have been mct and supporting-
documentation is attached. If the applicant has designated an agent on the Storrriwater Management Permit
Application Form, the agent may initial below. If a requirement has not been met, attach justification.
Applicants Initials
�3 P a. Curb outlets direct flow to a swale or vegetated area.
S6 P b. Swales or vegetated areas receiving curb outlet flow are designed to carry, at a minimum, the
peak flow from the 10-year storm.
—S-,C3 P c. Flow velocity is non-erosive for peak flow from the 10-year storm event.
S f3 P d. Longitudinal slope of the swale or vegetated area does not exceed 5%.
Ci P e. Side slopes of the swale or vegetated area are no steeper than 5:1 (horizontal to vertical).
Sf3 P f. Length of swale or vegetated area is > 100 feet.
SC3P g. The system takes into account the run-off at ultimate built-out potential from all surfaces
draining to the system (delineate drainage area for each swale).
�C3 P h. Swales are located in recorded drainage casements.
t3 P i. Grass type(s) for permanent vegetative cover specified on detail.
VS P j. Swale detail provided on plan
Form SWU-105 Ver 3.99 Page 3 of 3

111. DESIGN INFORMATION (CONT.)
Table 1. Swale Design Information
Swale No. Drainage Impervious Grassed C Q V allow V actual Flow
Area (ac) Area(ac). Area(ac) (cfs) (fps) (fps)_ Depth (ft)
A 1.88 0.69 1.19 0.51 6.01 5.0 2.44 0.70
B 0.28 0.20 0.08 0.75 1.33 5.0 1.95 0.37
C 1.00 0.40 0.60 0.53 3.34 5.0 2.11 0.56
D 6.09 1.61 4.48 0.44 13.41 5.0 4.50 0.77
E 1.42 0.48 0.94 0.49 4.36 5.0 2.92 0.55
F 5.56 1.39 4.17 0.43 11.96 5.0 3.23 0.86
G 6.21 1.78 4.43 0.45 14.17 5.0 2.64 1.04
H 5.29 1.58 3.71 0.46 12.29 5.0 2.07 1.09
I 4.24 1.66 2.58 0.52 10.93 5.0 2.18 1.00
J 0.93 0.37 0.56 0.53 3.10 5.0 1.59 0.62
K 5.56 1.94 3.62 0.49 13.91 5.0 3.01 0.96
L 0.66 0.28 0.38 0.55 2.28 5.0 2.08 0.47
M 3.79 1.40 2.39 0.51 12.16 5.0 2.13 1.07
N 2.84 0.98 1.86 0.49 8.81 5.0 2.00 0.94
0 3.49 1.25 2.24 0.50 11.03 5.0 2.17 1.01
P RESERVED FOR FUTURE DEVELOPMENT
Q1 4.16 1.84 2.32 0.56 11.79 5.0 3.19 0.86
Q2 2.25 0.93 1.32 0.54 7.66 5.0 2.59 0.77
R 0.83 0.29 0.54 0.49 2.59 5.0 1.98 0.51
S 6.87 2.02 4.85 0.46 15.85 5.0 3.58 0.94
T 1.75 0.56 1.19 0.47 5.23 5.0 2.10 0.71
U 2.25 0.75 1.50 0.48 6.86 5.0 2.52 0.74
V 3.54 1.15 2.39 0.48 10.66 5.0 2.81 . 0.87
W 1.85 0.84 1.01 0.57 6.63 5.0 2.37 0.75
X 3.50 1.21 2.29 0.49 10.87 5.0 2.16 1.00
Y 5.76 1.89 3.87 0.48 13.99 5.0 2.78 1.00
Z 4.50 1.44 3.06 0.47 10.80 5.0 3.02 0.85
FormSWU-105 Ver3.99 Pagc3of 3

III. DESIGN INFORMATION
Complete the following table. If additional space is needed the information should be provided in the same
format as Table 1 and attached to this form. Rainfall intensity data can be found in Appendix 8.03 of the State
of North Carolina Erosion and Sediment Control Planning and Design Manual.
Table 1. Swale Design Information
Swale No. Drainage Impervious Grassed C Q V allow V actual Flow
Area (ac) Area (ac) Area (ac) (cfs) (fps) (fps) Depth (ft)
AA 4.30 1.31 2.99 0.46 10.09 5.0 1.95 1.02
BB 4.00 1.01 2.99 0.43 10.77 5.0 2.82 0.87
CC 1.29 0.49 0.80 0.52 4.20 5.0 2.60 0.57
DD 2.26 0.64 1.62 0.45 6.39 5.0 1.36 0.97
EE 1.06 0.35 0.71 0.48 3.22 5.0 1.79 0.60
FF 7.76 2.28 5.48 0.46 17.90 5.0 2.47 1.20
GG 3.03 0.96 2.07 0.47 9.02 5.0 3.97 0.67
HH 3.52 1.22 2.30 0.49 10.94 5.0 2.57 0.92
II 4.10 1.39 2.71 0.49 10.12 5.0 1.57 1.14
11 1.34 0.27 1.07 0.39 3.31 5.0 1.37 0.69
KK 1.24 0.42 0.82 0.49 3.81 5.0 1.47 0.72
LL 2.09 0.78 1.31 0.51 6.74 5.0 1.94 0.83
MM 3.23 1.07 2.16 0.48 9.82 5.0 2.05 0.98
Form SWU-105 Ver3.99 Page of 3

IV. CURB OUTLET SYSTEM MAINTENANCE REQUIREMENTS
1. Mowing will be accomplished as needed according to the season. Grass height will not exceed six inches
at any time.
2. Swales will be inspected monthly or after every runoff producing rainfall event for sediment build-up,
erosion, and trash accumulation.
3. Accumulated sediment and trash will be removed as necessary. Swales will be reseeded or sodded
following sediment removal.
4. Eroded areas of the swales will be repaired and reseeded. Swales will be revegetated as needed and in a
timely manner based on the monthly inspections.
5. Catch basins, curb cuts, velocity reduction devices, and piping will be inspected monthly or after every
significant runoff producing rainfall event. Trash and debris will be cleared away from grates, curb cuts,
velocity reduction devices, and piping.
6. Swales will not be altered, piped, or filled in without approval from NCDENR Division of Water Quality.
I acknowledge and agree by my signature below that I am responsible for the performance of the six
maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to
changes to the system or responsible party.
Print Name and Title: Sean Scanlon, Project Coordinator
Address: 101 Ocean Blvd. West
Phone: [phone] Date: 7�jg1/61
Signature: _
Note: The legally responsible party should not be a homeowners association unless more than 50%of the lots have been sold and a
resident of the subdivision has been named the president.
I, eJLOe.4_ e ,a Notary Public for the State of IV,% `j �i0�/JQ, ,County of
do herqbf certify that j��L pn personally appeared before me this �I'!
day of �4�u ZppZ ,and acknowledge the due execution of the foregoing infiltration basin maintenance
requirements. i ness my hand and official seal,
DWI/yyy '
.A My commission expires �7 ZOOZ
U8LI V
ZOVERII0 INN'
Form SWU-105 Vcr 3.99 Page 3 of 3

r?t A TFR M c ze+ F.Eas ey. Go,rernor
C� :Y�`Z m G. Ross.J--.Secetary.
North Carolina Department of Enjircr:.reit and NaC,,ra'Resajrces
j } _ Aian W.)(limek. P.E., DYector
? Division of Water Q%elity
Wilmington Regional Office
January 14, 2003rj�-a 1 - 3 b
Mr. Sean Scanlon, Vice President ��jQ� -i9 3—3�'
Coastal Communities, Inc.
131 Ocean Blvd. West
Holden Beach,NC 28462
Subject: REQUEST FOR ADDITIONAL INFORMATION
Stotmwater Project No.SW8 010206&SW8990913
Seascape at Holden Plantation-Phase I& 11
Brunswick County
Dear Mr. Scanlon:
The Wilmington Regional Office received a Stormwater Management Permit Application
for Seascape a: Holden Plantation- Phase I&11 Modification on October 15, 2002 . A
preliminary review of that information has determined that the application is not complete. The
follo«ine infom�ation is needed to continue the stonnwater review:
1. Please provide Supplement forms with original signatures. For SW8 010206,Perr
Davis has signed Supplement
on the supplement forms. Please provide Petry Davis
with a letter of authorization if you would like him to sign for you.
2. Please Verify that the plans sent into the Division of Coastal Management and the
plans submitted to the Division of Water Quality for modification have the same
lot layout and lot numbering.
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 14,2003,
or the application will be returned as incomplete.The return of a project will necessitate I
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 applicatinon 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\CGS 143-215.1 and is subject
to enforcement action pursuant to NCGS 143-215.6A.
G V, i >
IX-t)-Asion of 1:'a:er Duality 127 Cardinal Drive Extension Wllmingtcn,N.0
t i.is

o\��o CAPE ,FEARri
Engineeng, Inc.
151 Poole Road,Suite 100 � 1 {0 9 1 3
BeNille,NC 28451
TEL [phone]A4
FAX(910)368lN5
www.capefeareng.com
Transmittal
To: Noelle Lutheran Date: 10/15/02
File: 801-01
subject: SeaScape Phase I
Stormwater Application
Attn:
❑ As Requested ❑ For Your Files ❑ For Distribution ® For your Review/Action /Approval
❑ Sent via Mail ❑ Sent via Courier
Quantity Drawing No. Description
2 Sets of Plans and Details
2 Original and One Copy of Application
1 Copy of all Supplements
1 Narrative and Design Calcs.
1 Fee of$420
REMARKS
CC: Cape Fear Engineering, Inc.
Signed
,o��'Jgff Petrof
Transmittal-Poole Rd

Design Narrative and
Supporting Calculations
For
SeaScape at Holden Plantation
Phase II
Brunswick County, North Carolina
Prepared for
Coastal Communities, Inc.
131 Ocean Blvd. West
Holden Beach, North Carolina 28462
[phone]
Date: June 2001
(Modified: October 2002)
tttt
L' >`-••..'.'tea., ,�'
Prepared by
SriSt- ;
Cape Fear Engineering, Inc. " q�
;C t
151 Poole Road, Suite 100
Belville, North Carolina 28451
[phone]

DESIGN NARRATIVE
L GENERAL:
The project site is located off of(SRI 119) Stone Chimney road approximately '/a of a mile south
of the Stone Chimney road and Sabbath Home road intersection within Brunswick County, North
Carolina. This phase of the project site is approximately 272.8 acres. Drainage considerations are
to be in accordance with DWQ stormwater requirements. Stormwater Permit #SW8 010206 was
issued for this project on 13 August 2001.
The intent of this project is to develop streets, drainage improvements, single family residential
lots, and amenities. This development will support 263 single-family homesites in Phase 2 of
construction. The impervious coverage has been kept to a minimum to promote infiltration as
much as possible. These homesites will average 1/2 of an acre in area and limited to no more
than 6,000 sq. ft. of built upon area per lot. Upon design completion, a layout for the clubhouse
area, with drainage improvements, will be submitted to your office.
2. EXISTING SITE:
Site topography in the area is relatively flat with slopes typically less than (2) percent. There are
low areas throughout the site that drain to wetlands, which will provide positive drainage for the
area to the Spring Creek and to the Atlantic Intracoastal Waterway. Vegetation consists primarily
of grasses and minor ground cover within the area of the improvements. Subsurface soils are
typically a mixture of sands, silty sands and organics.
3. PROPOSED IMPROVEMENTS:
Improvements proposed include drainage devices, streets, and utilities. Drainage for the most
part will sheet flow from the lots into the streets which will have curb and gutter to direct
drainage to low points in the roads. Drainage at the low points in the streets will flow into curb
inlets or curb cuts which then outlet into vegetative swales that will be constructed with 5:1 side-
slopes and a minimum length of 100 feet. In some instances in this project, once the storm water
flows through the vegetative swales at the minimum design criteria, it will drop into an inlet box
and be directed via subsurface piping to an outlet source. This outlet source will be a drainage
ditch with a minimum length of 100 feet. Piping is used sparingly for road culvert crossings and
where necessitated due to adverse topographical limitations. Piping will be perforated and
installed at relatively flat slopes to promote•infiltration when possible. The soils are very sandy
and ideal for infiltration.
1

Design Narrative and
Supporting Calculations
For
Seascape at Holden Plantation
Brunswick County, North Carolina
Prepared for
Coastal Communities, Inc.
131 Ocean Blvd. West
Holden Beach, North Carolina 28462
[phone]
Date: July, 2002
.�FL5B/0
•`�
BEAL
Prepared by 20563
GI c'
Cape Fear Engineering, Inc. »...
151 Poole Road, Suite 100
Belville, NC 28451
[phone]

DESIGN NARRATIVE
L GENERAL:
The project site is located off of(SR1119) Stone Chimney road approximately '/< of a mile south
of the Stone Chimney road and Sabbath Home road intersection within Brunswick County, North
Carolina. This phase of the project site is approximately 222 acres. Drainage considerations are
to be in accordance with DWQ stormwater requirements. Stormwater Permit# SW8 990913-
Mod. was issued for this project on 23 April 2001.
The intent of this project is to develop streets, drainage improvements, development office with
parking, single family residential lots, and a marina with amenities. This development will
support 273 single-family homesites in this first phase of construction. The impervious coverage
has been kept to a minimum to promote infiltration as much as possible. These home sites will
average 1/2 of an acre in area and limited to no more than 6,000 sq. ft. of built upon area per lot.
2. EXISTING SITE:
Site topography in the area is relatively flat with slopes typically less than (2) percent. There are
low areas throughout the site that drain to wetlands, which will provide positive drainage for the
area to the Spring Creek and to the Atlantic Intracoastal Waterway. Vegetation consists primarily
of grasses and minor ground cover within the area of the improvements. Subsurface soils are
typically a mixture of sands, silty sands and organics.
3. PROPOSED IMPROVEMENTS:
Improvements proposed include drainage devices, streets, utilities and a development office with
parking. Drainage for the most part will sheet flow from the lots into the streets which will have
curb and gutter to direct drainage to low points in the roads. Drainage at the low points in the
streets will flow into trench drains, curb inlets, or curb cuts which then outlet into vegetative
swales that will be constructed with 5:1 side-slopes and a minimum length of 100 feet. In some
instances in this project, once the stomp water flows through the vegetative swales at the
minimum design criteria, it will drop into an inlet box and be directed via subsurface piping to an
outlet source. This outlet source will be either a drainage ditch or the proposed marina basin. In
the case of a pipe directed into the marina basin, the pipe will be set to an elevation so that the
pipe will be below the marina basin water surface. The storm water that enters the proposed
subsurface pipe will be treated prior to entering this conveyance pipe. The pipe lengths have been
kept to a minimum and are needed only to convey treated storm water due to the topography
limitations. Piping will be perforated and installed at relatively flat slopes to promote infiltration
when possible. The soils are very sandy and ideal for infiltration.

C,O� �jl/1jFRQ Michael F. Easley, Governor
�O G William G. Ross, Jr., Secretary
Cl) North Carolina Department of Environment and Natural Resources
p Y Gregory J. Thorpe, Ph.D., Acting Director
Division of Water Quality
Wilmington Regional Office
May 16, 2002
Mr. Perry Davis, P.E.
Cape Fear Engineering
151 Poole Road, Suite 100
Belville,NC 28541
Subject: Seascape Marina Basin
Holden Beach
Brunswick County
Dear Mr. Davis:
This letter is to inform you that a permit is not required for the pumping of water from the future marina
basin at Seascape in Brunswick County. This activity is deemed to be permitted pursuant to G.S. 143-215.1(c)
provided that no water quality standards are contravened. This activity is referred to in Administrative Code 15A
NCAC 21-1.0100 .0106(0(7) as the discharge of groundwaters generated by well construction or other activities.
Please note, as we discussed, that BMPs are still required. Pumping the water to a vegetated area where it
can sheet flow through filtration prior to entering waters is acceptable. Please monitor the activity to make sure that
the discharge does not cause any erosion. The activity is not exempt from turbidity violations if the turbidity
standard of 25 NTU is exceeded.
Thank you for your cooperation on this matter. If you have any questions,please call me at(910)-395-3900
if you have any questions.
Sincerely,
Noelle Lutheran
Environmental Tech V
RSS\nml: S:\WQS\STORMWAT\LETTERS\SEASCAPE.MAY
cc: Carol Miller
Wilmington Regional Office
AREA. ..
N.C. Division of Water Quality 127 Cardinal Drive Extension Wilmington, N.C.28405 [phone] Fax[phone] Customer Service
800-623-7748

CAPE FEAR
;eeY�,. nc.
7AUG 0 ? I-11
BY: - -
Auqu5t I
Noelle Lutheran
NCDENK
Water Quality
127 Cardinal Drive Ext.
Wilmington, NC 28403
Re: 5ea5cape at Holden Plantation
C5W -9.909:1:3:
Dear M5. Lutheran:
Attached please find for your review and approval 2 copie5 of the deed
re5tr1ct1o115 for Iota I thru 19 1 and 3 1 8 thru 38G for the above referenced
project.
I trust this information to be Sufficient for your review. If you have any 6Jue5tion5,
comments, or require additional information regarding this matter, please contact
this office.
Sincerely_,
111 /l' 4
K. Davis Fennell, PE
Cc: file (80 1 -0 1 "30" SW)
5040 New Centre Or.,Suite 0 • Wilmington, NC 25403 • TEL:[phone] • FAX:[phone]
250 North Chuch Street • 5partanburg,5C 29306 • 'ML [phone] • FAX:[phone]

CAPE FEAR
Engineering, Inc. w/
5040 New Centre Drive,Suite D 250 North Chwch St. Z
Wilmington,N.C.28403 Spartanburg,SC 29308
TEL [phone] TEL [phone]
FAX [phone] FAX [phone]
www.Copefeareng.Com
Transmittal
TO: NCDENR DATE: 6/22/01
Water Quality Section PROJECT NO: 801-03
127 Cardinal Drive Ext. RE: SeaScap Phase II
Wilmington, NC 28405 At Holden Plantation
ATTENTION Noelle Lutheran Brunswick County
Quantity Drawing No. Description
2 Sets of Stormwater Management Plans and Details
2 Copies of Design Narrative and Supporting Calcs
2 1 Original and 1 Copy of Application
2 1 Original and 1 Copy of Curb Outlet Supplement
2 1 Original and 1 Copy of Low Density Supplement
LA I_...
REMARKS
Noelle, Per your letter dated 2/26/01, please find the enclosed package and replace your existing file.
If you have any comments or questions, feel free to contact me at 790-8584 ext. 106.
CC: File U�—^ CAPE FEAR Engineering, Inc.
Coastal Communities
Signed -�
`Jeffrey Petioff, E.I.
P:\801\801-03\Admin\Stormwater\trans-Lutheran062201.doc

9gvg13
Design Narrative and
Supporting Calculations
For
SeaScape at Holden Plantation
Phase II
Brunswick County, North Carolina
Prepared for
Coastal Communities, Inc. ,��,� ZZ UmEA l
131 Occan Blvd. West
Holden Beach, North Carolina 28462
[phone]
Date: June 2001
Prepared by
Cape Fear Engineering, Inc.
5040 New Centre Drive, Suit D
Wilmington, North Carolina 28403
[phone]

DESIGN NARRATIVE
1. GENERAL:
The project site is located off of(SRI 119) Stone Chimney road approximately'/< of a mile south
of the Stone Chimney road and Sabbath Home road intersection within Brunswick County, North
Carolina. This phase of the project site is approximately 272.8 acres. Drainage considerations are
to be in accordance with DWQ stormwater requirements.
The intent of this project is to develop streets, drainage improvements, single family residential
lots, and amenities. This development will support 261 single-family homesites in Phase 2 of
construction. The impervious coverage has been kept to a minimum to promote infiltration as
much as possible. These homesites will average 1/2 of an acre in area and limited to no more
than 6,000 sq. ft. of built upon area per lot. Upon design completion, a layout for the parking
and clubhouse areas, with drainage improvements, will be submitted to your office.
2. EXISTING SITE:
Site topography in the area is relatively flat with slopes typically less than (2) percent. There are
low areas throughout the site that drain to wetlands, which will provide positive drainage for the
area to the Spring Creek and to the Atlantic Intracoastal Waterway. Vegetation consists primarily
of grasses and minor ground cover within the area of the improvements. Subsurface soils are
typically a mixture of sands, silty sands and organics.
3. PROPOSED IMPROVEMENTS:
Improvements proposed include drainage devices, streets, and utilities. Drainage for the most
part will sheet flow from the lots into the streets which will have curb and gutter to direct
drainage to low points in the roads. Drainage at the low points in the streets will flow into curb
inlets or curb cuts which then outlet into vegetative swales that will be constructed with 5:1 side-
slopes and a minimum length of 100 feet. In some instances in this project, once the storm water
flows through the vegetative swales at the minimum design criteria, it will drop into an inlet box
and be directed via subsurface piping to an outlet source. This outlet source will be a drainage
ditch with a minimum length of 100 feet to conform with State standards. Piping is used
sparingly for road culvert crossings and where necessitated due to adverse topographical
limitations.
I.

SeaScape Phase It at Holden Plantation
atnple Calculations (Swale A)
Columns correspond to attached spreadsheet.
C (Cohimrr "4
C = Composite rational runoff coefficient = (Impervious area (column 2') * 0.95 +
Pervious area (Colurnn'31) * 0.25)/Drainage area (Column's`I') = 0.42
The Flowrate was calculated using the following Intensity equation:
Lo (C luniit 6;) (Brunsivick County IDF)
121.796
110 =Rainfall intensity(in/hr)= 0,843 = 6.31 in./hr
(T' +23.5)
Tc (C,olun n "5'.) = Time of concentration (min)
Assume: If Drainage Area < 4 Acres, Tc = 10 min.
If Drainage Area > 4 Acres, Tc = 20 min.
Q (C'ohmiii��7'J
Q = Flowrate (cfs) = C (Column "4.') * 1(Column 'VP *A
= 0.42 * 6.31 in/hr * 2.12ac = 5.60cfs
The depth offlow was calculated by reworking the following equations.-
Depth (Colurr rr ';11 ')
Depth (ft) =y
Use mannings equation to solve for y:
1.49
Stormwater Calculations

Seascape Phase 11 atIlolden Plantation
n = Mannings roughness coefficient = 0.03
A = Cross sectional area of flow (sf = (Bottom width * Depth) + (Side slope ratio
Depth') = 0+5 y'
R = Hydraulic radius(ft) _ A—
P
P= Wetted perimeter(ft) = Bottom width +2* Depth* I+Side slope ratio2
= 0+2y 1+5' therefore R = 0.49y
L (Column �"8') = Length of run (ft) = I00 ft
vjG _..
H(Cofimm f 9=S) =Elevation change (ft) = 1.5 ft
S (Column "Y0«) =Longitudinal slope (fi fi) = 0.015
Reformulate mannings equation:
y = i Q
18.90
y = 0.63 ft
The velocity was calculated using the.following equation:
Velocity (C(5lumn:''1IY)
V = Velocity(fps) V = Q = 2.79 fps
A
SIOCmwatct Calculations

Stormwater - Water Quality Swale Information (Columns Follow Sample Calculations)
Column , `"'1," ' „2., „3,. „4, " 5., „6„ 7„ „8„ „9„ „10„ 11„ 12., -
Drainage Impervious Grassed Runoff Coef. Time of Conc. Intensity Flowrate Length Height Slope Depth Velocity
Fswale Area (ac) Area (ac) Area (ac) C Tc (mi Q (cfs) L (ft) H (ft) S y (ft) V (fps)
A 2.12 j 0.51 1.61 0.42 10.00 6.31 5.60 100 1.5 0.0
B 4'.11 0.82 j 3.29 j 0.39 j 20.00 5.06 j� 8.11 -j 100 2 j 0.020 0.69 0.63 j 41
i .41
C 2.46 0.86 1.60 0.49 10.00 6.31 j 7.68 100 1 0.010 0.77 j 3 2.59
F 2.02 0.68 1.34 0.49 j 10.00 j 6.31 j 6.19 120 j 0.5 j 0.004 0.84 I 1.77
G j 2.00 0.63 1.37 0.47 _10.00 6.31 j 5.94 j 100 j 0.5 j 0.005 j 0.80 j 1.87 j
H 3.31 0.96 2.35 j j 6.31 j 9.46 I 110 I 0.5 0.005 j 6.96 2.03
0.45 10.00
1 3.09 j 1.32 j 1.77 j 0.55 10.00 6.31 10.70 j 000 j 0.5 j 0.005 _ 0.99 j 2.17 j
J 3.43 j t25 j 2.18 j 0.51 j 10.00 j 6.31 10.93 130 0.5 j 0.004 I 1.05 ! 1.98 j
K 2.72 0.75 j 1.97 0.44 _j _10.00 6.31 j 7.60 j 130 j 1_ j 0.008 j 0.81 2.34
L 1.92 j 0.79 .31
j 1 13 j 0.54 j 10 00 6 6 52 110 I_ _ _ ,_ ---j 2, 0.018 j 0.65 j 3.11 j
M I 4.28 1.09 3.19 j 0.43 _F 20.00 5.06 9.28 j 125 .j- 0.75 0.006 0.91 2.24
N 6.3
--232_i 0.77 1.55 0.48 10.00- -- i--------- --- - - -i -- - ----- -
-- _ ;_ 1 7.06 175 ! 1 0.006 0.83 j 2.06
O 3.73 - �_ 0.84 - j 2.89 j_ 0.41 10.00 6.31 9.59 _100 -- --' -- -- - --
_ __ _ 1.5 0.015 -� 0.78_j 3.19 1
Q 3.04 0.94 j 3.48 j 0.45 _ 20.00 _-5_06 _� 11.09 130 1 - 0.008 -' -0.93 j 2.58 j
j 2.10 L 0.47 10.00 I- . 6.31 8.95 130 2 0.615 0.75 3.17
R 4.71 1.38 3.33 j 0.46 j 20.00 j 5.06 10.85 - 125 4 6.032 0.70 4.37 j
S 2.88 0.87 2.01 0.46 10.00 6.31 j 8.39 110 1 _
T 3 125.49 0.96 2.53 0.44 10.00 6.31 9.75 0.0 0.81 2.56
U 2.12 0.69 1.43 0.48 10.00 6.31 6.39 �j 3 j 0.024 0.71 j 3.82
115 4 j 0.035 0.57 3.95
V j 4.00 j 1.39 2.61 j 0.49 10.00 j 6.31 12.45 l 125 T 4 0.032 0.74 4.53
W 3.05 0.79 j 2.26 0.43 10.00 6.31 8.30 160 2.5 0.016 0.73 3.13
X 2.44 0.63 1.81 0.43 10.00 j 6.31 j 6.63 110 j 1 0.009 j 0.74 2.41
Y 2.46 0.81 1.65 0.48 10.00 j 6.31 j 7.46 j 120 j 0.5 j_ 0.004 0.90 j 1.85_j
Z 5.83 j 1.74 4.09 1 0.46 20.00 j_5.06_� 13.55 I 140 1.5 0.011 0.94 3.07
CC 2.31 32 j 0.85 1.47 j 0.51 j 10.00 -I 6.31- 7.41_j 170 1 1.5 - j 0.009 -_0.78 _ 2.45
j 0.69 j 0.58 10.00 6.31 j 4.80 230 1 1 0.004 j 0.75 1.69 -
DID 3.71 1.09 2.62 j 0.46 10.00 -- 6.31 j 10.67 100 j 1.5 1 0.015 j 0.81 j 3.28
EE 1.89 1 0.96 j 0.93 j 0.61 10.00 j 6.31 j_7.22 j 145 12.5 1- -0_017 _I 0.68 1 3.13
FF j 4.46 j 1.56 j 2.90 j 0.49 j 26.00-_�- 5.06 11.17 L 110 j 1.75 j 0.016 0.81 3.39
GG j 1.80 j 0.71 j 1.09 1_ 0.53 10.00 6.31 5.98 j 270 _1.5 0.006 0.78 1 1.95
HH 3.26 I 0.84 2.42 0.43 10.00 _6.31_j 8.85 j 100 3 _I 0.030
II 2.27 j 1.00 1.27 j 0.56 I 0.66 j 4.06 j
- 6.31 8.00 1 200 j 1 0.005 j 0.89 2.02
JJ 2.25 I _-0.93 1 32 __I__0.54_ 10 00 - 1 6.31 j 7.66 1 329 -L-- 3 0.009 0.78 2.50 I
KK 2.20_j 0.66 1.54 j 0.46 1 10.00 6.31 6.39 j 150 j 2 0_013 j 0.68--�2.76
LL --2.67 j 1.01 j 1.66 1 0.51 1 10.00 j 6.31 8.67 j 100
MM I� 1.33 j 0.26 1.07 0.39 10.00 j 6.31 3.25 j 200 4 0.020 j 0.49 j 2.71
NN 1.43 1 0.33 1.10 0.41 10.00 _6.31 3.71 _1 100 j- 1 - j 0.010 O.59 2.16 -
00 2.32 0.74 j 1.58 0.47 j 10.00-- - 6.31 --- 6.93 140 t -i _0.007 j_ 079 _� 2.23
PP 1 6.01 1.12 4.89 0.38 20.00 j 5.06 j 11.58 1 130 1 1.75 0.013 _j 0.85 L 3.21