SW8000220_Historical File_20030516

A lr,j ) .
y
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
May 16, 2003
Mr. W. Christopher Stephens, President
Landmark Developers, Inc.
5022 Wrightsville Avenue, Suite 102
Wilmington, NC 28403
Subject: Stormwater Permit No. SW8 000220
Modification
The Lakes @Magnolia Greens
High Density Subdivision
Brunswick County
Dear Mr. Stephens:
The Wilmington Regional Office received a complete modified Stormwater Management
Permit Application for the Lakes @Magnolia Greens on March 6, 2003. 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 000220, dated May 16, 2003, for the construction of the
project, The Lakes @Magnolia Greens.
This permit shall be effective -from the date of issuance until May 26, 2010, and shall be
subject to the conditions and limitations as specified therein. Please pay special
attention to the Operation and Maintenance requirements in this permit. Failure to
establish an adequate system for operation and maintenance of the stormwater
management system will result in future compliance problems.
If any parts, requirements, or limitations contained in" this permit are unacceptable, you
have the right to request an adjudicatory hearing upon written request within thirty (30)
days following receipt of this permit. This request must be in the form of a written
petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed
with the Office of Administrative Hearings, P.O. Drawer 27447, Raleigh, NC 27611-
7447. Unless such demands are made this permit shall be final and binding.
If you have any questions, or need additional information concerning this matter, please
contact Linda Lewis, or me at [phone].
Sincerely,
Rick Shiver
Water Quality Regional Supervisor
RSS/:arl S:IWQSISTORM�'VA TXPERMITt000220.may03
cc: Davis Fennell, P.E.
Delaney Aycock, Brunswick County Inspections
Linda Lewis
Wilmington Regional Office
Central Files
N. C. Division of Water Quality 127 Cardinal Drive Extension [phone] Customer Service
Wilmington Regional Office Wilmington, NC 28405 [phone] Fax [phone]

State Stormwater Manfagement, Systems
Permit No. SW8 000220 Modificatioh
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
W. Christopher Stephens, Landmark Developers, Inc.
The Lakes @Magnolia Greens
Brunswick County
FOR THE
construction, operation and maintenance of a non -discharging wet detention pond 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 May 16, 2013 and shall be
subject to the following specified conditions and limitations:
I. DESIGN STANDARDS
1. This permit is effective only with respect to the nature and volume of stormwater
described in the application and other supporting data.
2. This stormwater system has been approved for the management of stormwater
runoff as described on page 3 of this permit, the Project Data Sheet.
3. The subdivision is permitted for 201 lots each allowed a maximum amount of
built upon area. Lots 1A through 90 and Lots 5-69 through 5-110 are limited to
5,000 square feet of built -upon area. Lots 5-1 through 5-68 are limited to 4,000
square feet of built -upon area.
4. Approved plans and specifications for this project are incorporated by reference
and are enforceable parts of the permit.
5. The detention pond is designed to store up to 8" of runoff without discharging.
Offsite subdivisions permitted under SW8 020522, SW8 970104, and SW8
990628 are included in the drainage area of this pond.
N

State Stormwater Management Systems
Permit No. SW8 000220 Modification
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
W. Christopher Stephens, Landmark Developers, Inc.
The Lakes @Magnolia Greens
Brunswick County
FOR THE
construction, operation and maintenance of a non -discharging wet detention pond 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 May 16, 2013 and shall be
subject to the following specified conditions and limitations:
I. DESIGN STANDARDS
1. This permit is effective only with respect to the nature and volume of stormwater
described in the application and other supporting data.
2. This stormwater system has been approved for the management of stormwater
runoff as described on page 3 of this permit, the Project Data Sheet.
3. The subdivision is permitted for 201 lots each allowed a maximum amount of
built upon area. Lots 1A through 90 and Lots 5-69 through 5-110 are limited to
5,000 square feet of built -upon area. Lots 5-1 through 5-68 are limited to 4,000
square feet of built -upon area.
4. Approved plans and specifications for this project are incorporated by reference
and are enforceable parts of the permit.
5. The detention pond is designed to store up to 8" of runoff without discharging.
Offsite subdivisions permitted under SW8 020522, SW8 970104, and SW8
990628 are included in the drainage area of this pond.

State Stormwater Management Systems
Permit No. SW8 000220 Modification
DIVISION OF WATER QUALITY
PROJECT DATA SHEET
Project Name:
Permit Number:
Location:
Applicant:
Mailing Address:
Application Date:
Name of Receiving Stream / Index #:
Classification of Water Body:
Design Storm:
Pond Depth, feet:
Drainage Area, acres:
Onsite
Offsite —SW8 020522
Offsite —SW8 970104
Offsite —SW8 990628
Total Impervious Surfaces, ft5:
201 Lots, ft2:
Roads/Parking, ft2:
Sidewalk, ft2:
Offsite-020522, ft2:
Offsite-970104, ft2:
Offsite-990628, ft2:
Permanent Pool Elevation, FMSL:
Provided Surface Area, ft2:
Provided 8" Storage Volume, ft3:
Temporary Storage Elevation, FMSL:
Controlling Orifice:
The Lakes @Magnolia Greens
SW8 000220 Modification
Brunswick County
Mr. W. Christopher Stephens, President
Landmark Developers, Inc.
5022 Wrightsville Avenue, Suite 102
Wilmington, NC 28403
May 19, 2000
Modified January 30, 2003
Modified March 6, 2003
Jackey's Creek / (CFR 18-77-3)
"C Sw"
E:li
4
154.95
131.48
4.6
7.67
11.2
1,828,797
937,000
424,275
84,071
58,560
84,735
240,156
21
555,514 @Permanent Pool
1,500,951
23.5
n/a (non -discharging system)
K

State Stormwater Management Systems
Permit No. SW8 000220 Modification
II. SCHEDULE OF COMPLIANCE
1. No homeowner/lot owner/developer shall fill in, alter, or pipe any drainage feature
(such as swales) shown on the approved plans as part of the stormwater
management system without submitting a revision to the permit and receiving
approval from the Division.
2. The permittee is responsible for verifying that the proposed built -upon area for
the entire lot, including driveways and sidewalks, does not exceed the allowable
built -upon area. Once the lot transfer is complete, the built -upon area may not be
revised without approval from the Division of Water Quality, and responsibility for
meeting the built -upon area limit is transferred to the individual property owner.
3. If an Architectural Review Committee (ARC) is required to review plans for
compliance with the BUA limit, the plans reviewed must include sidewalks and
driveways. Any approvals given by the ARC do not relieve the homeowner of the
responsibility to maintain compliance with the permitted BUA limit.
4. The following items will require a modification to the permit:
a. Any revision to the approved plans, regardless of size.
b. Project name change.
C. Transfer of ownership.
d. Redesign or addition to the approved amount of built -upon area.
e. Further subdivision, acquisition, or sale of the project area. The project
area is defined as all property owned by the permittee, for which
Sedimentation and Erosion Control Plan approval was sought.
f. Filling in, altering, or piping of any vegetative conveyance shown on the
approved plan.
5. The Director may determine that other revisions to the project should require a
modification to the permit.
F. 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.
7. 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.
8. The stormwater management system shall be constructed in it's entirety,
vegetated and operational for its intended use prior to the construction of any
built -upon surface.
9. During construction, erosion shall be kept to a minimum and any eroded areas of
the system will be repaired immediately.
4

State Stormwater Management Systems
Permit No. SW8 000220 Modification
10. 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.
11. Decorative spray fountains will not be allowed in the stormwater treatment
system.
12. 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.
13. 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.
14. Prior to the sale of any lot, deed restrictions must be recorded which limit the
built -upon area per lot to the amount as shown on the Project Data Sheet, per
Section I, Part 2. The recorded statements must follow the form:
a. The following covenants are intended to ensure ongoing compliance with
State Stormwater Management Permit Number SW8 000220. as issued
by the Division of Water Quality under NCAC 2H.1000.
b. The State of North Carolina is made a beneficiary of these covenants to
the extent necessary to maintain compliance with the stormwater
management permit.
C. These covenants are to run with the land and be binding on all persons
and parties claiming under them.
d. The covenants pertaining to stormwater may not be altered or rescinded
without the express written consent of the State of North Carolina,
Division of Water Quality.
e. Alteration of the drainage as shown on the approved plan may not take
place without the concurrence of the Division of Water Quality.
Lots 1A through 90 and Lots 5-69 through 5-110 are limited to 5,000
square feet. Lots 51 through 5-68 are limited to a maximum of 4,000
square feet per lot. This allotted amount includes any built -upon area
constructed within the lot property boundaries, and that portion of the
right-of-way between the front lot line and the edge of the pavement. Built
upon area includes, but is not limited to, structures, asphalt, concrete,
gravel, brick, stone, slate, coquina and parking areas, but does not
include raised, open wood decking, or the water surface of swimming
Pools.
g. The covenants pertaining to stormwater regulations may not be changed
or deleted without concurrence of the State.
h. Alteration of the drainage as shown on the approved plan may not take
place without the concurrence of the State.
5

State Stormwater Management Systems
Permit No. SW8 000220 Modification
15. A copy of the recorded deed restrictions must be submitted to the Division within
30 days of the date of recording the plat, and prior to selling lots. The recorded
copy must bear the signature of the Permittee, the deed book number and page,
and stamp/signature of the Register of Deeds.
16. 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.
17. 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.
18. Prior to transfer of the permit, the pond must be inspected by DWQ personnel,
and determined to be in compliance with all permit conditions. Any items not in
compliance must be repaired or replaced to design condition prior to the transfer.
Records of maintenance activities performed to date will be required.
19. Built upon area includes, but is not limited to, structures, asphalt, concrete,
gravel, brick, stone, slate, coquina and parking areas, but does not include
raised, open wood decking, or the water surface of swimming pools.
20. T he permittee shall at all times provide the operation and maintenance
necessary to assure the permitted stormwater system functions at optimum
efficiency. The approved Operation and Maintenance Plan must be followed in its
entirety and maintenance must occur at the scheduled intervals including, but not
limited to:
a. Semiannual scheduled inspections (every 6 months).
b. Sediment removal.
C. Mowing and revegetation of side slopes.
d. Immediate repair of eroded areas.
e. Maintenance of side slopes in accordance with approved plans and
specifications.
f. Debris removal and unclogging of outlet structure, orifice device and catch
basins and piping.
g. Access to the outlet structure must be available at all times.
h. The vegetated filter shall be kept free of erosion. The spreader
mechanism shall be kept free of sediment and trash, and shall evenly
distribute the runoff across the width of the filter.
III. GENERAL CONDITIONS
This permit is not transferable. If there is either a desire for the facilities to
change ownership, or there is a name change of the Permittee, then a
"Name/Ownership Change Form" must be submitted to the Division of Water
Quality accompanied by appropriate documentation from the parties involved,
such as a copy of the deed of trust, recorded deed restrictions, etc. Other
supporting materials, such as a signed Operation and Maintenance plan in the
case of engineered systems, will also be required. The project must be in good
standing with DWQ. The approval of this request will be considered on its merits
and may or may not be approved. The permittee is responsible for compliance
with all permit conditions until such time as the Director approves the transfer.
9

State Stormwater Management Systems
Permit No. SW8 000220 Modification
2. Failure to abide by the conditions and limitations contained in this permit may
subject the Permittee to enforcement action by the Division of Water Quality, in
accordance with North Carolina General Statute 143-215.6A to 143-215.6C.
3. The issuance of this permit does not preclude the Permittee from complying with
any and all statutes, rules, regulations, or ordinances which may be imposed by
other government agencies (local, state, and federal) which have jurisdiction.
4. In the event that the facilities fail to perform satisfactorily, including the creation of
nuisance conditions, the Permittee shall take immediate corrective action,
including those as may be required by this Division, such as the construction of
additional or replacement stormwater management systems.
5. The permit may be modified, revoked and reissued or terminated for cause. The
filing of a request for a permit modification, revocation and reissuance or
termination does not stay any permit condition.
6. Permittee grants permission to staff of the DWQ to access the property for the
purposes of inspecting the stormwater facilities during normal business hours.
7. The permittee shall notify the Division of any mailing address changes within 30
days.
Permit issued this the 16th day of May, 2003.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
Alan VV. Klimek, P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission
Permit Number SW8 000220
7

FFICE USE ONLY
Date Received
Fee Paid
Permit Number
6
a 2.10 A"
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This form may be photocopied for use as an original
I. GENERAL INFORMATION:
1. Applicant's name (specify the name of the corporation, individual, etc. who owns the project):
Landmark Developers, Inc.
2. Print Owner/Signing Official's name and title (person legally responsible for facility and
compliance):
W. Christopher Stephens, President
3. Mailing Address for person listed in item 2 above:
5022 Wrightsville Ave. Suite 102
City: Wilmington
State: NC
Zip: 28403
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.):
The Lakes/Phase V at Magnolia Greens (formerly Patio Homes II)
5. Location of Project (street address):
NC Highway 17
City: Leland
6. Directions to project (from nearest major intersection):
County: Brunswick
Located along the north right-of-way on Highway 17 approximately 1000 ft Northeast of the Highway 17
and Lanvale Road intersection.
7. Latitude: 34-12-40
Longitude: 78-01-47
8. Contact person who can answer questions about the project:
Name: Chris Stephens Telephone Number: [phone]
H. PERMIT INFORMATION:
1. Specify whether project is (check one): New
of project
Renewal X Modification
Form: SWU-101 Version 3.99 Page 1 of 4

2. If this application is being submitted as the result of a renewal or modification to an existing permit, list the
existing permit number SW8 000220 Mod. And its issue date (if known) February 4, 2003
3. Specify the type of project (check one):
X Low Density High Density Redevelop General Permit Other
4. Additional Project Requirements (check applicable blanks):
CAMA Major X Sedimentation/Erosion Control 404/401 Permit NPDES Stormwater
Information on required state permits can be obtained by contacting the Customer Service Center at
1-877-623-6748.
III. PROJECT INFORMATION
1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative
(one to two pages) describing stormwater management for the project.
Stormwater will be collected via curb and gutter collection systems and will be piped to an existing non -
discharge pond. The non -discharge also accepts runoff from adjoining projects within Magnolia Greens as an off -site
treatment facility.
2. Stormwater runoff from this project drains to the
3. Total Project Area
131.48
Cape Fear
River basin.
Acres 4. Project Built Upon Area: 25.24 % %
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 See Sheet 2A
Receiving Stream Name
Receiving Stream Class
Drainage Area
Existing Impervious* Area
Proposed Impervious* Area
% Impervious* Area (total)
Impervious* Surface Area
See Sheet 2A
On -site Buildings
On -site Streets
On -site Parking
On -site Sidewalks
Other on -site
Off site
Total:
Total:
-•• r�• �.��� ��u u���..Gu ua c cull, upurt urea incauaang, our nor amarea to, ouuaangs, roads, parking areas,
sidewalks, gravel areas, etc.
Form: SWU-101 Version 3.99 Page 2 of 4

6. Complete the following information for each drainage basin. If there are more than two drainage basins in the project, attach an
additional sheet with the information for each basin provided in the same format as below.
Basin Infbr�on
Can-5rte (The Lakes)
Glenciale (Perrnrt Penchn )
Receiving Stream Name
Jackey5 Creek
Jackey5 Creek
Receiving Stream Class
C-SW
C-5W
Drainage Basin Area
13 1.48 AC
4.GO AC
Existing impervious* Area
0 AC
0 AC
Proposed Impervious* Area
33.18 AC
1.34 AC
% Impervious* Area (total)
25.24 %
29. 1 3
impervious* Surface Area
Can-5ite {the Lakes)
Glendale (Perrmt Pendrn
On -site Buildings
937,000 5F (2 1 .5 1 AC)
15,000 5F (0.34 AC)
On -site Streets
424,275 5F (9.74 AC)
3G, 155 5F (0.83 AC)
On -site Parking
0 5F
0 5F
On -site Sidewalks
54,071 5F (1 .93 AC)
7,405 5F (0. 17 AC)
Other on -site
0 5F
0 5F
Off site
0 5F
O SF
Total:
X= 1 ,445,34G 5F (33. 18 AC)
58,5GO 5P (1.34 AC)
Basin In cut
Holy Glen (5W8 970104)
Fairway V41aay, (5W8 990G28)
Receiving Stream Name
Jackey5 Creek
Jackey5 Creek
Receiving Stream Class
C-5W
C-5W
Drainage Basin Area
7.G7 AC
1 1 .20 AC
Existing Impervious* Area
0 AC
0 AC
Proposed Impervious* Area
1,94 AC
5.5 1 AC
Impervious* Arca (total)
25.29 %
49.20 %
Impervious* Surface Area
Ha Glen (5W8 970104)
FaMw Villa (SWS 990G28)
On -site Buildings
59,000 5F (1 .35 AC)
183,354 5F (4.21 AC)
On -site Streets
20,05G 5F (0.4G AC)
50,547 SF (I. I G AC)
On -site Parking
0 5F
0 5F
On -site Sidewalks
5,G79 5F (0. 13 AC)
G,255 5F (0. 14 AC)
Other on -site
0 5F
0 5F
0 5F
Off site
0 5f
Total:
84,735 5F (1.94 AC)
E= 240,1 5G 5F (5.51 AC)
Basin In ormabon
Non-D*char e Pond -Total
Receiving Stream Name
Jackey5 Creek
Receiving Stream Class
C-5W
Drainage Basin Area
154.95 AC
Existing Impervious* Area
0 AC
Proposed Impervious* Area
41.97 AC
% Impervious* Area (total)
27.09 %
Impervious Surface Area
Nan-Di5char e Pond -Total
On -site Buildings
937,000 5F (2 1.5 1 AC)
On -site Streets
424,275 5F (9.74 AC)
On -site Parking
0 5F
On -site Sidewalks
84,071 5F (1.93 AC)
Other on -site
0 5F
Off site
383,451 5F (8.80 AC)
Total:
Y= 1 ,828,797 5F (41.97 AC)
E_
Page 2A of 4

7. How was the off -site impervious area listed above derived? From design plans for adjoining projects -
See sheet 2A for impervious breakdown.
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.
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 area 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.
** 4,000sf for lots 5-1 thru 5-68 and 5,000sf for all other lots.
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
Form SWU-103
Form SW-104
Form SWU-105
Form SWU-106
Form SW-107
Form SWU-108
Form SWU-109
Wet Detention Basin Supplement
Infiltration Basin Supplement
Low Density Supplement
Curb Outlet System Supplement
Off -Site System Supplement
Underground Infiltration Trench Supplement
Neuse River Basin Supplement
Innovative Best Management Practice Supplement
Form: SWU-101 Version 3.99 Page 3 of 4

VI. SUBMITTAL REQUIREMENTS
Only complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ).
A complete package includes all of the items listed below. The complete application package should be
submitted to the appropriate DWQ Regional Office.
Please indicate that you have provided the following required information by initialing in the space provided
next to each item.
Initials
• Original and one copy of the Stormwater Management Permit Application Form
• One copy of the applicable Supplement Form(s) for each BMP
• Permit application processing fee of $420 (payable to NCDENR)
• Detailed narrative description of stormwater treatment /management
• Two copies of plans and specifications, including:
-Development/Project name
-Engineer and firm
-Legend
-North Arrow
-Scale
-Revision number & 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
-Vegetatcd buffers (where required)
VFI. AGENT AUTHORIZATION
If you wish to designate submittal authority to another individual or firm so that they may provide information on yo
behalf, please complete this section:
Designated agent (individual or firm): Cape Fear Engineering, Inc.
Mailing Address: 151 Poole Road, Suite 100
City: Belville
State: NC
Phone: [phone] Fax: [phone]
VIH. APPLICANT'S CERTIFICATION
Zip: 28451
I, (print or Vpe name ofperson listed in General Information, item 2j W. Christopher Stephens
certify that the information included o this pFrmit application form is, to the best of my _knowledge, correct and
that the project will be constructed i onfa ance with theApproved plans, that the required deed restrictions
and protective cove s wil e r d d t r osed project complies with the requirements of 15A
NCAC 2H .1000. //
Signature: I ` Date:
Form: SWU-101 Version 3.99 1 f Page 4 of 4

Permit No. S W $ OCM20 HCL4.
(to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PEWMIT 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 : The Lakes/Phase V at Magnolia Greens
Contact Person: Chr15 Stephens Phone Number: (910 ) 392-7201
Number of Lots: _ 201 Allowable Built Upon Area Per Lot*: **
133 (.�'s fos
**Lots lA thru 90 and 5-69 thru 5-110 @ 5,000 sf ; Lots 5-1 thm 5-68 @ 4,000 sf
*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
Form: SWU-104 Rev 3.99 Page 1 of 2

surfaces located between the front lot line and the edge of pavement.
(SA x DF) - RA - OA = BUA
No. Lots Lots
Calculation:
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 Stormwater
Management Pcrmit Application Form, the agent may initial below.
Applicants Initials
a. A 30 foot vegetative buffer is provided adjacent to surface waters. Projects in the Neuse
River basin may require additional buffers.
b. Deed restriction language as required on form SWU-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.
7S6G-'> C. Built upon area calculations are provided for the overall project and all lots.
_ %P d. Project conforms to low density requirements within the ORW AEC (if applicable).
[15A NCAC 211.1007(2)(b)]
Form: SWU-104 Rev 3.99 Page 2 of 2

Permit No. �8DUd CXD4 ^tol
(to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
WET DETENTION BASIN SUPPLEMENT
This form may be photocopied for use as an original
DWQ Stormwater Management Plan Review:
A complete stormwater management plan submittal includes an application form, a wet detention basin supplement
for each basin, design calculations, and plans and specifications showing all basin and outlet
structure details.
I. PROJECT INFORMATION
Project Name: The Lakes at Magnolia Greens
Contact Person: Chris Stephens
Phone Number: [phone]
For project with multiple basins, specify which basin this worksheet applies to: Non-Di5char e Pond
elevations
Basin Bottom Elevation
17.0
ft.
(floor of the basin)
Permanent Pool Elevation
21.0
ft.
(elevation of the orifice)
Temporary Pool Elevation
23.5
ft.
(elevation of the discharge structure overflow)
areas
Permanent Pool Surface Area
555,514
sq. ft.
(water surface area at the orifice elevation)
Drainage Area
154.95
ac.
(on -site and of -site drainage to the basin)
Impervious Area
41.97
ac.
(on -site and off -site drainage to the basin)
volumes
Permanent Pool Volume
2,032,405
cu. ft.
(combined volume of main basin and forebay)
Temporary Pool Volume
1,500,951
cu. ft.
(volume detained above the permanent pool)
Forebay Volume
N/A
cu. ft.
(approximately 20% of total volume)
Other parameters
SA/DA'
2.4
(surface area to drainage area ratio from DWQ table)
Diameter of Orifice
N/A
in.
(2 to 5 day temporary pool draw -down required)
Design Rainfall
g
in.
Design TSS Removal 2
90
%
(minimum 85% required)
Form: SWU-102 Rev 3.99 Page 1 of 4

Footnotes:
' When using the Division SA/DA tables, the correct SA/DA ratio for permanent pool sizing should be computed based upon the
actual impervious % and permanent pool depth. Linear interpolation should be employed to determine the correct value for non-
standard table entries.
2 In the 20 coastal counties, the requirement for a vegetative filter may be waived if the wet detention basin is designed to provide
90% TSS removal. The NCDENR BMP manual provides design tables for both 85% TSS removal and 90% TSS removal.
II. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Stormwater Best Management Practices Manual
(N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code Section:
15 A NCAC 2H .1008.
Initial in the space provided to indicate the following design requirements have been met and supporting
documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit
Application Form, the agent may initial below. If a requirement has not been met, attach justification.
Applicants Initials:
a.
The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet).
* b.
The forebay volume is approximately equal to 20% of the basin volume.
c.
The temporary pool controls runoff from the design storm event.
* d.
The temporary pool draws down in 2 to 5 days.
3Q e.
If required, a 30-foot vegetative filter is provided at the outlet ( include non -erosive flow
calculations)
f.
The basin length to width ratio is greater than 3:1.
g.
The basin side slopes above the permanent pool are no steeper than 3:1.
* h.
A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail).
Q P i.
Vegetative cover above the permanent pool elevation is specified.
* j.
A trash rack or similar device is provided for both the overflow and orifice.
A recorded drainage casement is provided for each basin including access to nearest right -
of —way.
1.
If the basin is used for sediment and erosion control during construction, clean out of the
basin is specified prior to use as a wet detention basin.
m.
A mechanism is specified which will drain the basin for maintenance or an emergency.
* Non -discharge pond -these items are not required.
III. WET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the
vegetated filter if one is provided.
This system (check one) 0 does does not incorporate a vegetated filter at the outlet.
This system (check one) 0 does does not incorporate pretreatment other than a forebay.
Form: SWU-102 Rev 3.99 Page 2 of 4

Maintenance activities shall be performed as follows:
1. After every significant runoff producing rainfall event and at least monthly:
a. Inspect the wet detention basin system for sediment accumulation.; erosions trash accumulation,
vegetated cover, and general condition.
b. Check and clear the orifice of any obstructions such that drawdown of the temporary pool occurs
within 2 to 5 days as designed.
2. Repair eroded areas immediately, re -seed as necessary to maintain good vegetative cover, mow vegetative
cover to maintain a maximum height of six inches, and remove trash as needed.
3. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to
maintain proper functioning.
4. Remove accumulated sediment from the wet detention basin system semi-annually or when depth is
reduced to 75% of the original design depth (see diagram below). Removed sediment shall be disposed
of in an appropriate manner and shall be handled in a manner that will not adversely impact water quality
(i.e. stockpiling near a wet detention basin or stream, etc.)
The measuring device used to determine the sediment elevation shall be as such that it will give an accurate
depth reading and not readily penetrate into accumulated sediments.
When the permanent pool depth reads 3.00 feet in the main pond, the sediment shall be removed.
When the permanent pool depth reads N/A feet in the forebay, the sediment shall be removed.
BASIN DIAGRAM
ill IINWWakal
Permanent Pool Elevation = 2 1 .0
5ediment Removal Ele tion = N/A---75% Sediment Removal Elevation = 16.0 75%
Bottom Elevation = N/A 25% Bottom Elevation = 17.0 25% /
FOREBAY MAIN POND
Remove cattails and other indigenous wetland plants when they cover 50% of the basin surface. These
plants shall be encouraged to grow along the vegetated shelf and forebay berm.
6. If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment
through the emergency drain shall be minimized to the maximum extent practical.
Form: SWU-102 Rev 3.99 Page 3 of 4

T All components of the wet detention basin system shall be maintained in good working order.
I acknowledge and agree by my signature below that I am responsible for the performance of the seven maintenance
procedures listed above. I agree to notify DWQ of any problems with the system or prior to any
changes to the system or responsible party.
Print name: W. Christopher Stephens
Title: President
Address: 5022 Wrightsville Avenue
Phone: [phone]
Signature:
Date:
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.
/� 5 l I'Voo-V7 CarOLIN,4
I, Gott pyin e Jit , ,a Notary Public for the State of
County of N c ,do hereby certify that , G�
personally appeared before me this ZS +day of MAr ,and acknowledge the due
execution of the foregoing wet detention basin maintenance requir ments. Witness my hand and official seal,
3yCJ��a
SEAL
My commission expires 31471 Zoo 7
Form: SN W-102 Rev 3.99 Page 4 of 4

CAPE FEAR
Engineering, Inc.
151 Poole Road, Suite 100
Belville, NC 28451
TEL [phone]
FAX [phone]
www.capefearen_q.com
To: NCDENR — Div. Water Quality
127 Cardinal Drive Ext.
Wilmington, NC 28405
Attn:
❑ As Requested ❑ For Your Files
❑ Sent via Mail ❑ Sent via Courier
Transmittal
File: 230-00
Subject: Magnolia Greens
The Lakes / Phase V
Stormwater Submittal
❑ For Distribution ® For your Review / Action / Approval
Quantity
Drawing No.
Description
2
Original + 1 Copy of Application and Supplements
1
$420.00 Application Fee
2
Copies of Sample Deed Restrictions
2
Copies of Pond Certification
2
Project Narrative and Supporting Calculations
2
Sets of Plans
REMARKS
CC: Cape Fear Engineering, Inc.
File
Signed
e . Petroff,

SAMPLE STORMWATER DEED RESTRICTIONS
THE LAKES/PHASE V 9 MAGNOLIA GREENS
S. Stormwater Runoff Regulations: All Lots are subject to the State of North Carolina
rules and regulations concerning stormwater runoff as these rules and regulations are amended
from time to time. These regulations currently provide that the land area of lots 1 thru 90 and
lots 5-69 thru 5-110 be restricted to 5,000 SF ; lots 5-1 thru 5-68 be restricted to 4,000 SF of built
upon area. Built upon area shall include impervious surfaces such as foundation; structures;
pavement; concrete; driveways, including that portion of the driveway located within a street
right-of-way, which runs from the property line to the road pavement; and walkways or patios of
brick, stone or slate, and gravel, marl or stone covered areas, not including wood decking.
The DEVELOPER reserves the right to recalculate the maximum allowable built upon area in
accordance with the stormwater runoff rules and regulations of the State of North Carolina. All
drainage swales or drainage patterns used to treat stormwater runoff as required by the State of
North Carolina may not be filled in, piped or changed without the consent of the DEVELOPER,
its designee, the Association, or the State of North Carolina and shall be maintained as set forth
in Section V below. The State of North Carolina is hereby made a beneficiary of these
PROTECTIVE COVENANTS to the extent necessary to enforce its stormwater runoff
regulations as the same may be amended from time to time. This paragraph cannot be changed
or deleted without the consent of the State of North Carolina. These covenants are to run with
the land and be binding on all persons and parties claiming under them.
RECEIVED
MAR 0 6 2003
PROD # S6U aw boo Zoo Ho

Stormwater
Design Narrative and Calculations
For
The Lakes / Phase V
at
Magnolia Greens Plantation
Brunswick County, North Carolina
Prepared for:
Landmark Developers
5022 Wrightsville Ave. Suite 102
Wilmington, North Carolina 28403
[phone]
Date: March, 2003
Prepared by:
Cape Fear Engineering, Inc.
151 Poole Road, Suite 100
Belville, North Carolina 28451
[phone]
RECEIVED
MAR 0 6 2003
DWQ
PROJ # S w j ocv zw Hyd
5 M�4,¢cH0 3
`tom \V f G S S
SEAL
024908
.fNGI

DESIGN NARRATIVE
L GENERAL:
The project site is located within the Magnolia Greens Plantation which is situated along the
northeast right-of-way on NC Hwy 17 approximately 1000 feet northeast from the intersection of
Hwy 17 and Lanvale Road, within Brunswick County, North Carolina. The site is located on the
east side of Grandiflora Drive between Pine Harvest Drive, Cornerstone Drive and golf holes 1
and 2 on the new golf course. The project area consists of approximately 155 acres within the
Magnolia Greens Plantation subdivision, all of which will be disturbed. Drainage considerations
are to be in accordance with DEM stormwater requirements.
The intent of this project is to develop single family housing. This project will also include the
installation of utilities and a stormwater drainage system to a proposed non -discharge pond.
The purpose of this permit modification is to increase the project area to include Phase V. Phase
V drains to the same existing non -discharge pond as The Lakes, therefore the modification to
include Phase V with The Lakes. There will still be some off -site drainage to the pond and a
Designer's Certification accompanies this permit modification to satisfy the requirements of an
off -site treatment facility.
2. EXISTING SITE:
Site topography in the area is relatively flat with slopes typically less than one (1) percent.
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 the construction of roads, utilities, and drainage considerations,
(see plans). Drainage considerations include the construction of a twelve acre non -discharge
pond. These improvements will support the proposed residential development.
4. DRAINAGE CONSIDERATIONS:
Drainage on the site will sheet flow to curb inlets within roadway areas. Proposed roads are to
be cut 1 to 1.5 feet below existing grade to insure that all lots will drain to the street. Stormwater
will then be collected in separate curb and gutter collection systems. From there, the drainage
will be piped to the proposed non -discharge pond at multiple locations, each ending in a flared
end section with rip rap. The proposed non -discharge pond will have a depth of approximately
four feet and is designed to retain a twenty-five year storm event with no discharge.

In addition to the non -discharge pond being able to contain a twenty-five year event, a
stormwater pump station will also drain down the pond to provide golf course irrigation needs.
Irrigation water pumped from this pond will be aggressively filtered to prevent suspended solids
from clogging the tiny nozzles of the irrigation spray heads.
The pond surface elevation was determined to be twenty-one feet during the wet season.
Attached pond routing demonstrates that the twenty-five year storage elevation to be 21.55 which
is below the emergency overflow outlet elevation of 23.5. Therefore no discharge will be
released during a twenty-five year storm event. Additional calculations are provided to prove
that the pond will not discharge even in the 100 year storm event. The maximum flood stage in
the 100 year event is calculated to be 21.62, yielding over 1.75 feet of freeboard in the pond in
the 100 year storm. Pond storage can be increased in the future by means of raising the elevation
of the opening emergency spillway.
Calculations are also attached showing the containment of an 8-in storm event with no discharge.
These calculations were done using the Simple Method by Schueler.
5. EROSION CONTROL CONSIDERATIONS:
The proposed non -discharge pond will provide adequate sediment storage for the installation of
the proposed collection system. Inlet protection is to be installed once the inlets of the drainage
piping system have been constructed to reduce the amount of sediment released into the non -
discharge pond.
Erosion Control Measures and Sequence:
a. Temporary construction entrance.
b. Temporary sediment basins (non -discharge pond).
c. Energy dissipaters at the pipes into the non -discharge pond.
d. Temporary inlet sediment protection at storm drain inlets.
e. Temporary seeding should construction be halted for the specified time limit (refer to
specifications)
f. Remove all temporary erosion control measures once installation of utilities and paving
have been completed and a good vegetative ground cover has been established.
6. MAINTENANCE CONSIDERATIONS:
During construction, the Contractor shall be required to inspect and repair as needed all erosion
control devices after any significant rain event. Any measure found not performing its intended
function should be repaired immediately. Upon completion of construction and establishment of
permanent ground cover, the Owner shall be responsible for maintenance on the project site.

Stormwater Calculations

WET POND DATA SHEET
THE LAKES AT MAGNOLIA GREENS
NON -DISCHARGE POND
5
Drainage Area (Ad) On -Site= 13 1.48 ACRES
Impervious Area (Ai) On -site:
BUILDINGS: 21.51 ACRES
ROADS: 9.74 ACRES
SIDEWALKS: 1.93 ACRES
TOTAL: 33. 18 ACRES
Drainage Area (Ad) Glendale= 4.G ACRES
Impervious Area (Ai) Glendale:
BUILDINGS: 0.34 ACRES
ROADS: 0.83 ACRES
SIDEWALKS: 0. 17 ACRES
TOTAL: 1.34 ACRE5
Drainage Area (Ad) Holly Glen= 7.G7 ACRE5
Impervious Area (Ai) Holly Glen:
BUILDINGS: 1.35 ACRES
ROAD5: 0.4G ACRE5
SIDEWALKS: 0. 13 ACRES
TOTAL: 1.94 ACRES
Drainage Area (Ad) Fairway= 1 1 .2 ACRES
Impervious Area (Ai) Fairway:
BUILDINGS: 4.21 ACRES
ROADS: 1. 1 G ACRES
51DEWALKS: 0. 14 ACRES
TOTAL: 5.51 ACRES
Drainage Area (Ad) TOTAL=
Impervious Area (Ai) TOTAL:
BUILDINGS:
ROADS:
51 DEWALK5:
TOTAL:
154.95 ACRES
27.41 ACRES
1 2. 19 ACRES
2.37 ACRES
41.97 ACRE5
I = Ai/Ad = 27.09% NON -DISCHARGE DATA SHEET
PAGE I OF 2
REVISED: FEBRUARY, 2003

POND# I SHALL BE 4' DEEP AND DESIGNED TO REMOVE 90% T55.
5A/DA= 2.4300%
REQUIRED SURFACE AREA AT PERMANENT POOL:
SA,EQ.= 3.7G5285 AC. = I G401 G SF
SURFACE AREA PROVIDED AT PERMANENT POOL (EL. 2 I )= 555,5 14 51'
r............................................................................................................................... %
5A PROV'D= 5555 14 > I G401 5.81 =5A REQ'D OK
.................................................................................................................................:
MINIMUM REQUIRED VOLUME (51MPLE METHOD BY TOM 5CHUELEK):
Rv=0.05+0.009*(I)
Kv= 0.293775
VOLUME= 8"*Rv*Ad = 30.347 AC -FT
= 1 ,32 I ,9 1 5 FT^ 3
VOLUME PROVIDED AT TEMPORARY POOL
INCREM.
TOTAL
SA (5F)
VOL. (CF)
VOL. F
21.00
555,514
0
0
22.00
591,338
573,42G
573,42G
23.00
G27,343
G09,341
1, 182,7G7
23.50
G45,394
318,1841
1,500,95 I
**STORAGE VOLUME MORE THAN ADEQUATE**
PERMANENT POOL VOLUME:
INCREM.
TOTAL
JL
SA (5F)
VOL. (CF)
VOL. F
17.00
4GO,818
0
0
18.00
484,4GO
472,G39
472,G39
19.00
508,04G
49G,253
9G8,892
20.00
531,733
519,890
1,488,762
21.00
555,514
543,G24
2,032,405
NON-D15CHARGE DATA SHEET
PAGE 2Of2
REVISED: FEBRUARY, 2003

Project: non-discharge7MAY02.ORW: Brco ver8.IDF ! 2 hyd's 102-24-2003

Hydrograph Summary Report Page ,

Hydrograph Report
Hyd. No. 1
Drainage Area
Hydrograph type
= Rational
Storm frequency
= 25 yrs
Drainage area
= 154.9 ac
Intensity
= 5.61 in
I-D-F Curve
= Brco ver8.IDF
Hydrograph Discharge Table
Time -- Outflow
(hrs cfs)
0.02
23.18
0.03
46.35
0.05
69.53
0.07
92.70
0.08
115.88
0.10
139.05
0.12
162.23
0.13
185.40
0.15
208.58
0.17
231.75
0.18
254.93
0.20
278.11
0.22
301.28
0.23
324.46
0.25
347.63 <<
0.27
324.46
0.28
301.28
0.30
278.11
0.32
254.93
0.33
231.75
0.35
208.58
0.37
185.40
0.38
162.23
0.40
139.05
0.42
115.88
0.43
92.70
0.45
69.53
0.47
46.35
0.48
23.18
... End
Page 1
English
Peak discharge = 347.63 cfs
Time interval = 1 min
Runoff coeff. = 0.4
Time of conc. (Tc) = 15 min
Reced. limb factor = 1
Total Volume = 312,868 cuft

Hydrograph Report
Hyd. No. 2
Pond Routing
Hydrograph type = Reservoir
Storm frequency = 25 yrs
Inflow hyd. No. = 1
Max. Elevation = 21.55 ft
Storage Indication method used.
Hydrograph Discharge Table
Peak discharge
Time interval
Reservoir name
Max. Storage
Page 1
English
= 0.00 cfs
= 1 min
= Non -Discharge P
= 312,868 cuft
Total Volume = 0 cuft
Time
Inflow
Elevation
Clv A Clv B Clv C Clv D Wr A Wr B Wr C Wr D Outflow
(hrs)
cfs
ft
cfs cfs cfs cfs cfs cfs cfs cfs cfs
0.00
0.00
21.00
----- ----- ----- ----- ----- ----- 0.00 <<
0.02
23.18
0.00
----- ----- ----- ----- ----- ----- 0.00 <<
... End

Hydrograph Summary Report
Page 1
Hyd.
No.
Hydrograph
type
(origin)
Peak
flow
(cfs)
Time
interval
(min)
Time to
peak
(min)
Volume
(cult)
Return
period
(yrs)
Inflow
hyd(s)
Maximum
elevation
(ft)
Maximum
storage
(cuft)
Hydrograph
description
1
Rational
397.90
1
15
358,113
50
---
-----
----
Drainage Area
2
Reservoir
0.00
1
0
0
50
1
21.62 s)�-
358,113
Pond Routing
Proj. file: non-discharge7MAY02.GW
file: Brco_ver8.IDF
Run date: 02-24-2003

Hydrograph Report
Hyd. No. 1
Drainage Area
Hydrograph type
Storm frequency
Drainage area
Intensity
I-D-F Curve
= Rational
= 50 yrs
= 154.9 ac
= 6.42 in
= Brco ver8.IDF
Hydrograph Discharge Table
Time -- Outflow
(hrs cfs)
0.02
26.53
0.03
53.05
0.05
79.58
0.07
106.11
0.08
132.63
0.10
159.16
0.12
185.69
0.13
212.22
0.15
238.74
0.17
265.27
0.18
291.80
0.20
318.32
0.22
344.85
0.23
371.38
0.25
397.90 <<
0.27
371.38
0.28
344.85
0.30
318.32
0.32
291.80
0.33
265.27
0.35
238.74
0.37
212.22
0.38
185.69
0.40
159.16
0.42
132.63
0.43
106.11
0.45
79.58
0.47
53.05
0.48
26.53
..End
Peak discharge =
Time interval =
Runoff coeff. _
Time of conc. (Tc) _
Reced. limb factor =
Page 1
English
397.90 cfs
1 min
0.4
15 min
1
Total Volume = 358,113 cuft

Hydrograph Report
Hyd. No. 2
Pond Routing
Hydrograph type = Reservoir
Storm frequency = 50 yrs
Inflow hyd. No. = 1
Max. Elevation = 21.62 ft
Storage Indication method used.
Hydrograph Discharge Table
Peak discharge
Time interval
Reservoir name
Max. Storage
Page 1
English
= 0.00 cfs
= 1 min
= Non -Discharge P
= 358,113 cult
Total Volume = 0 cult
Time
Inflow
Elevation
Clv A Clv B Clv C Clv D Wr A Wr B Wr C Wr D Outflow je_
(hrs)
cfs
ft
cfs cfs cfs cfs cfs cfs cfs cfs cfs
0.00
0.00
21.00
----- ----- ----- ----- ----- ----- ----- ----- 0.00 <<
0.02
26.53
0.00
----- ----- ----- ----- ----- ----- ----- ----- 0.00 <<
... End
/�o Discr►.fatiF
sue. 12,.1

Hydrograph Summary Report
Page 1
Hyd.
No.
Hydrograph
type
(origin)
Peak
flow
(cfs)
Time
interval
(min)
Time to
peak
(min)
Volume
(cuft)
Return
period
(yrs)
Inflow Maximum
hyd(s) elevation
(ft)
Maximum
storage
(cuft)
Hydrograph
description
1
Rational
436.69
1
15
393,018
100
----
------
----
Drainage Area
2
Reservoir
0.00
1
0
0
100
1
21.69 ;Oe
393,018
Pond Routing
STi1K.
Proj. file: non-discharge7MAY02.GHW
file: Brco_ver8.IDF
FRUn date: 02-24-2003

Hydrograph Report
Hyd. No. 1
Drainage Area
Hydrograph type
Storm frequency
Drainage area
Intensity
I-D-F Curve
= Rational
= 100 yrs
= 154.9 ac
= 7.05 in
= Brco ver8.IDF
Hydrograph Discharge Table
Time -- Outflow
(hrs cfs)
0.02
29.11
0.03
58.22
0.05
87.34
0.07
116.45
0.08
145.56
0.10
174.67
0.12
203.79
0.13
232.90
0.15
262.01
0.17
291.12
0.18
320.24
0.20
349.35
0.22
378.46
0.23
407.57
0.25
436.69 <<
0.27
407.57
0.28
378.46
0.30
349.35
0.32
320.24
0.33
291.12
0.35
262.01
0.37
232.90
0.38
203.79
0.40
174.67
0.42
145.56
0.43
116.45
0.45
87.34
0.47
58.22
0.48
29.11
End
Peak discharge =
Time interval =
Runoff coeff. _
Time of conc. (Tc) _
Reced. limb factor =
Page 1
English
436.69 cfs
1 min
0.4
15 min
1
Total Volume = 393,018 cuft

Hydrograph Report
Hyd. No. 2
Pond Routing
Hydrograph type = Reservoir
Storm frequency = 100 yrs
Inflow hyd. No. = 1
Max. Elevation = 21.69 ft
Storage Indication method used.
Hydrograph Discharge Table
Page 1
English
Peak discharge = 0.00 cfs
Time interval = 1 min
Reservoir name = Non -Discharge P
Max. Storage = 393,018 cuft
Total Volume = 0 cuft
Time Inflow Elevation Clv A Clv B Clv C Clv D Wr A Wr B Wr C Wr D Outflow
(hrs) cfs ft cfs cfs cfs cfs cfs cfs cfs cfs cfs
0.00 0.00 21.00 ----- ----- ----- ----- ----- ----- 0.00 <<
0.02 29.11 0.00 ----- ----- ----- ----- ----- ----- 0.00 <<
... End
Al. Df r_-9 &Ab
/0 0 I',e - STo e.1

Erosion Control Calculations

',Magnolia Greens
The Lakes / Phase V
DISTURBED AREA � STORAGE CALCULATIONS for PONDS
Disturbed Area = 1,960,207 sf
Storage Required: 1,960,207 sf 0.5 0.0833 =
Pond Area = 555.614 sf
Pond Depth (min.during constr.) = 4 ft
Storage Provided = 2,222,056 cf
Provided Required
2,222,056 > 81,643 OK
81643 cf