SW8970726_Historical File_19971202

. State of North Carolina
.`Department of Environment
and Natural Resources
Wilmington Regional Office
James B. Hunt, Jr., Governor
Wayne McDevitt, Secretary
Division of Water Quality
Mr. William Buchanan, Partner
South College Associates
298 North Front Street, Suite 309
Wilmington, NC 28401
Dear Mr. Buchanan:
I ffl�v
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
December 2., 1997
Subject: Permit No. SW8 970726
Still Meadow Village
High Density Commercial Stormwater Project
New Hanover County
The Wilmington Regional Office received the Stormwater Management Permit Application for Still Meadow Village on July
23, 1997, with final information on November 21, 1997. 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 970726 dated December 2, 1997, for the construction of Still Meadow Village.
This permit shall be effective from the date of issuance until December 2, 2007, and shall be subject to the conditions and
limitations as specified therein. Please pay special attention to the Operation and Maintenance requirements in this permit.
Failure to establish an adequate system for operation and maintenance of the stormwater management system will result in
future compliance problems.
If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an adjudicatory
hearing upon written request within thirty (30) days following receipt of this permit. This request must be in the form of a
written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of Administrative
Hearings, P.O. Drawer 27447, Raleigh, NC 27611-7447. Unless such demands are made this permit shall be final and binding.
-If you have any questions, or need additional information concerning this matter, please contact Linda Lewis, or me at (910)
395-3900.
Sincerely,
Rick Shiver, P.G.
Acting Regional Water Quality Supervisor
RSS/arl: S:\WQS\STORMWAT\PERMIT\970726.DEC
cc: Joseph Hill, P.E.
Tony Roberts, New Hanover County Inspections
Beth Easley, New Hanover County Engineering
Linda Lewis
mznbzon Regia
Central Files
127 North Cardinal Dr., Wilmington, North Carolina 28405 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/10% post -consumer paper

State Stormwater Management Systems
Permit No. SW8 970726
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
STATE STORNIWATER MANAGEMENT EME 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
South College Associates
Still Meadow Village
New Hanover County
Ti i FOR E
construction, operation and maintenance of a detention pond and use of existing wetlands 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 December 2, 2007 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.
This stormwater system has been approved for the management of stormwater runoff as described on page 3 of this
permit, the Project Data Sheet. The stormwater control has been designed to handle the runoff from 274,969 square
feet of impervious area.
3. Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the
permit.
4. The tract will be limited to the amount of built -upon area indicated on page 3 of this permit, and per approved plans.
PJ

State Stormwater Management Systems
Permit No. SW8 970726
Project Name:
Permit Number:
Location:
Applicant:
Mailing Address:
Application Date:
Water Body Receiving Stormwater Runoff.
Classification of Water Body:
If Class SA, chloride sampling results:
Pond Depth, feet:
Permanent Pool Elevation, FMSL:
Total Impervious Surfaces, ft2:
Outparcels, ft2
Future, ft2
Offsite Area entering Pond, ft2:
Required Surface Area, ft2:
Provided Surface Area, ft2:
Required Storage Volume, ft3:
Provided Storage Volume, ft3:
Temporary Storage Elevation, FMSL:
Controlling Orifice:
DIVISION OF WATER QUALITY
PROJECT DATA SHEET
Still Meadow Village
970726
New Hanover County
Mr. William Buchanan, Partner
South College Associates
298 North Front Street, Suite 309
Wilmington, NC 28401
July 23, 1997
Motts Creek
"C Swig
n/a
5
19.4
7.74,969
n/a
n/a
none, per Engineer
19,481
23,250
23,730
32,012
20.7
2.25" pipe
3

State Stormwater Management Systems
Permit No, SW8 970726
5. The permittee is responsible for verifying that the proposed built -upon area does not exceed the allowable built -upon
area.
6. The following items will require a modification to the permit:
a. Any revision to the approved plans, regardless of size.
b. Project name change.
C. Transfer of ownership.
d. Redesign or addition to the approved amount of built -upon area.
e. Further subdivision of the project area.
f. Filling in, altering, or piping of any vegetative conveyance shown on the approved plan.
i
In addition, the Director may determine that other revisions to the project should require a modification to the permit.
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.
H. SCHEDULE OF COA11PLIANCE
1. The permittee will comply with the following schedule for construction and maintenance of the stormwater management
system:
a. The stormwater management system shall be constructed in it's entirety, vegetated and operationai for it's
intended use prior to the construction of any built -upon surface except roads.
b. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be repaired
immediately.
2. The permittee shall at all times provide the operation and maintenance necessary to assure the permitted stormwater
system functions at optimum efficiency. The approved Operation and Maintenance Plan must be followed in its entirety
and maintenance must occur at the scheduled intervals including, but not limited to:
a. Semiannual scheduled inspections (every 6 months).
b. Sediment removal.
C. Mowing and revegetation of side slopes.
d. Immediate repair of eroded areas.
e. Maintenance of side slopes in accordance with approved plans and specifications.
f. Debris removal and unclogging of outlet structure, orifice device and catch basins and piping.
g. Access to the outlet structure must be available at all times.
3. 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.
4. 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.
5. 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. Note any deviations from the approved plans and specifications on the Certification.
n

State Stormwater Management Systems
Permit No. SW8 970726
6. 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.
7. Prior to the sale of any portion of.the property, an access/maintenance easement to the stormwater facilities shall be
granted in favor of the permittee if access to the stormwater facilities will be restricted by the sale of any portion of
die property. Additionally, built -upon area restrictions for the portion sold must be recorded.
8. If at any time the swales into the wetland areas exihibit channelization, flow spreader mechanisms will be designed,
approved and installed at each Swale location.
M. GENERAL CONDITIONS
This permit is not transferable. In the event there is a desire for the facilities to change ownership, or there is a name
change of the Permittee, a formal permit request must be submitted to the Division of Water Quality accompanied by
an application fee, documentation from the parties involved, and other supporting materials as may be appropriate.
The approval of this request will be considered on its merits and may or may not be approved.
2. Failure to abide by the conditions and limitations contained in this permit may subject the Permittee to enforcerdent
action by the Division of Water Quality, in accordance with North Carolina General. Statute 143-215.6A to 143-
215.6C.
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.
The permittee grants DENR Staff permission to enter the property for the purpose of inspecting all components of the
permitted stormwater management facility.
6. The permit may be modified, revoked and reissued or terminated for cause. The filing of a request for a permit
modification, revocation and reissuance or termination does not stay any permit condition.
Permit issued this the 2nd day of December, 1997.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
A. Preston Howard, Jr., P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission
Permit Number SW8 970726
5

State Stormwater Management Systems
Permit No, SW8 970726
Still Meadow Village
--Stormwater Permit No. SW8 970726
New Hanover County
]Engineer's Ceet.ir"ic:ation
1, , as a duly registered Professional Engineer in the State of North Carolina,
having been authorized to observe (periodically/weekly/full time) the construction of the project,
(Project)
for (Project Owner) hereby state that, to the best of my abilities, due care and
diligence was used in the observation of the project construction such that the construction was observed to be built within
substantial compliance and intent of the approved plans and specifications.
Noted deviations from approved plans and specification:
Signature
Registration Number
Date
SEAL
Z

STORMWATER
D E C E I V E
D
JUL 2 31997 STILL MEADOW VILLAGE
STORMWATER MANAGEMENT SYSTEM
PROJ #15MnoIZ2(O OPERATION AND MAINTENANCE PLAN
The stormwater management system, to include but not limited to all swales,
berms, infiltration and collection devices, stormwater detention pond, inlet and outlet
structures shall be owned and operated by the Still Meadow Village Homeowner's
Association.
Operation and Maintenance shall include:
1. Establish and maintain vegetation by seeding, fertilizing, and mulching to
achieve vigorous growth.
2. Mow all grassed areas, including vegetative filters, swales, basin banks,
etc., monthly or as needed according to growing season.
3. Inspect all catch basins, ditches, swales, pipes or other stormwater
diversions and conveyance structures monthly for accumulation of debris
or sediment. Remove obstructions as necessary.
4. Inspect vegetated swales, forebay, wet detention pond side slopes, inlet
and outlet areas of diversion structures for sloughing, erosion, or washout
of cover vegetation monthly and following precipitation events.
Immediately repair and revegetate damaged areas.
5. Inspect stone rip rap or other energy dissipation devices monthly and
following precipitation events. Reposition dislodged stone or add new
stone as necessary. Repair structures as necessary.
6. Inspect outlet structure monthly and following precipitation events. Skim
floating debris from area between trashguard and riser. Visually inspect
outlet orifice and weir assembly. Remove accumulated deposits of scale,
algae, and floating debris by scouring with stiff bristled brush.
K/.oi ,-- CPO
7. Notify N.C. Division of ament at [phone] if
detention pond water level does not return to permanent pool elevation
within five days following a precipitation event.
8. Measure forebay and detention pond bottom annually at sufficient points
to monitor sediment accumulation. Sediment shall be removed when
ave age acc mutation of one (1) foot of sediment occurs.
OWNER: Uw DATE:
William H. Buchanan, Jr. - Ffartner
South College Associates
228 N. Front Street, Suite 309
Wilmington, N.C. 28401
DATE: 2ads

n. DIVISION OF WATER QUALITY
ti
NORTH CAROLINA STORMWATER MANAGEMENT PERMIT APPLICATION
I. GENERAL INFORMATION
(Please print clearly or type)
1. Project Name Still Meadow Village
2. Location, directions to project (include County, Address, State Road) Attach map. South College Road.
1/2 mile north of Int. N.C. 132 & U.S. 421 in New Hanover County
3. Owner's Name So,tth rnllega Assnr;atcs Phone [phone]
4.Owner's Mailing Address 298 N. Front Street, Suite 309
City Wilmington State N. C. Zip 28401
5. Nearest Receiving Stream
Motts Creek
Class Csw
6.Projectdescription Multi —family dwellings wit�ingerAd ctormwater system
H. PERMIT INFORMATION
1. Permit No. (To beftlledinbyDwo
2. ApplicationDate 6/18/97 Feeenclosed$ 385.00
3. PermitType: X New Renewal Modification (existing Permit No.)
4. Project Type: Low Density X Detention Infiltration Redevelop General Alter Offsite
5. Other State/Federal Permits/Approvals Required (Check appropriate bku&,)
CAMA Major Sedimentation/Erosion Control X 404 Permit
III. Is BUILT UPON AREA (Please see NCAC 2H.1005 thru .1007 for applicable density limits)
Classification
Existing Built -upon Area
Proposed Built -upon Area
Total Project Area
Drainage Drainage
Basin Basin
N/A
6.32 AC.
17.12 AC_
% Built -upon Area 37%
IV. STORMWATER TREATMENT (Describe how the runoff will be treated)
Wet detention Pond
Breakdown of Impervious Area
(Please indicate below the design impervious area)
Buildings 66, 584 SF
Streets/Parking 174, 525 SF
ft"J/SW 19,260 SF
Pool/Tennis 14,600 SF
Odier
Totals 274,969 SF
(6.32 AC.)

V. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
Deed restrictions and protective covenants are required to be recorded for all low density projects and all
subdivisions prior to the sale of any lot. Please see Attachment A for the specific items that must be recorded
for the type of project applied for.
By your signature below, you certify that the recorded deed restrictions and protective covenants for this project
shall include all the items required by the permit, that the covenants will be binding on all parties and persons
claiming under them, that they will run with the land, that the covenant cannot be changed or deleted without
concurrence from the State, and that they will be recorded prior to the sale of any lot.
VI. OWNER'S CERTIFICATION
I, W,'LC1 OPL-- •d. -/31cC. certify that the information included on this permit
(Please print clearly or type)
application form is correct, that the project will be constructed in conformance with the approved plans, that
the deed restrictions will be recorded with all required permit conditions, and that to the best of my knowledge,
the proposed project complies with the requirements of 15A NCAC 2H.1000..
I authorize the below named person or firm to submit stormwater plans on my behalf.
I . . A
William H. Buchanan
Owner/Authorized Agent Signature and
-Partner Date
VII. AGENT AUTIIORIZATION (Please fill in the name of the engineer/surveyor authorized to submit plans on the owner's behalf.)
Person or firm name Joseph S. Hill, Jr. and Associates
Mailing Address 1602 Harbour Drive
City Wilmington State N_ r,_ Zip 28401 Phone [phone]
Please submit application, fee, plans and calculations to the appropriate Regional Office.
cc: Applicant/WiRO//Central Files
STQRMWATE'A
SCEIV -4 D 1
JUL 2 �, 1991
BY: R70(p

ATTACIBVVIENT A �'yORMWA
TER
LOW DENSITY AND ALL SUBDIVISION PROJECTS D E C E I V E
GENERAL SUBMITTAL REQUIREMENTS H JUL
L 2 31997
1. A completed sormwater permit application.
D E M
PA0J #
2. Two sets of plans showing north arrow, scale, revision date, property/project boundaries, lot lines,
proposed and existing contours, drainage areas, mean high water line, wetlands, easements, the 30'
minimum vegetated buffer between impervious areas and surface waters, proposed impervious areas,
and road cross -sections.
3. Calculations of the built -upon area, For subdivisions, please show the methodology for arriving at the
per lot built -upon area. For non -subdivision projects, please break down the calculation into buildings,
roads, parking, and other (include all impervious areas).
4. Low density projects with curb outlet systems will require:
a. Drainage area delineation and swale locations shown on the plans.
b. Detail of the swale, showing minimum 5:1 side slope.
C. Velocity calculations, indicating a non -erosive flow for the 10 yr storm.
d. Inlet and outlet elevations. Maximum longitudinal slope is 5%.
e. The type of vegetated cover specified on the plans.
f. A flow spreader mechanism located at the swale entrance.
g. A signed Operation and Maintenance Plan.
DEED RESTRICTION REQUIREMENTS
The following statements must be included for all low density projects, and for all subdivisions:
No more than 274,969 square feet )O(9a including that portion of the right-of-way between the edge
of pavement and the front lot line, shall be covered by impervious structures, including ' asphalt, gravel,
concrete, brick, stone, slate or similar material, not including wood decking or the water surface of swimming
pools. This covenant is intended to ensure continued compliance with the stormwaterpermit issued by the State
of North Carolina. The covenant may not be changed or deleted without the consent of the State.
No one may fill in or pipe any roadside or lot -line swale, except as necessary to provide a minimum driveway
crossing.
For curb outlet system projects, no one may pipe, fall in, or alter any lot line swale used to meet North
Carolina Stormwater Management Permit requirements. (Continued Below) —
NOTE If lot sizes vary significantly, the owner/developer must provide an attachment listing each lot number, size,
and the allowable built -upon area for each lot.
— All rooftop or other drainage from impervious surfaces shall be routed to the
stormwater pond through the use of rooftop gutters or by grading the site
to route flow to the front of the buildings.

JOSEPH S. HILL, JR. AND ASSOCIATES
CONSULTING ENGINEERS and P �r-, -, , -, rY��
16M HARBOUR DRIVE
WMMINGTON, NORTH CAROUNA NO V Z 1
TELEPHONE9104WI5" 1997
BY:
November 14, 1997
Ms. Linda Lewis, Environmental Engineer
N.C.D.E.N.R.
127 North Cardinal Drive
Wilmington, North Carolina 28405
Subject: Stormwater Project No. SW8 970726
Response to Information Request
Still Meadow Village Apartments
South College Associates Owner
Dear Ms. Lewis:
MAILING ADDRESS:
POST OFFICE BOX 5592STA. I
WB.MINGTON, NC 28403-4155
STORMWATER
This letter is in response to your November 6, 1997 letter requesting additional
information for this project.
1. Please find attached two (2) additional complete copies of plans for your
use. I am sending a separate copy to Mr. John Dorney.
2. The design calculations are sealed.
3. In regard to providing "level spreaders" at each swale inlet to the
wetland, we offer the following information for the Division's
consideration.
Basically, as we are all aware, this particular type of wetland mitigation
program is experimental in nature, and design criteria are not firmly established. For
economic reasons, if the design criteria become too strict we cannot proceed with the
project. For this and other reasons, we do not believe that the "level spreader"
mechanisms are necessary in this particular instance. They are redundant
specifically because the entrance swales are non -erosive. We are using rip -rap
aprons to dissipate energy at each stormwater take -off point from paved areas. Also,
because multiple take -off points are necessary (and have been provided), we do not
have a large flow rate of water at any one point (maximum 1 - 5 cfs).
The normal context of use of the level spreaders involves placement of these
devices in a vegetated filter prior to the stormwater flowing off -site. They are used to
evenly distribute stormwater when the stormwater vegetated filter is a primary
method of stormwater treatment. In this instance, the wetlands are not the primary
treatment method. Any rainfall which does not soak into the wetlands and other
pervious areas, flows into the stormwater pond for treatment.
JF2/SMLEW I S4

Ms. Linda Lewis
Still Meadow Village Apt.
November 14, 1997
Page 2
As an alternative, we have no objection to configuring the rip -rap aprons at the
stormwater take -off points into the shape of level spreaders, as shown on your detail
described as Figure 18 (see attached). Our rip -rap apron, with a depth of 18 inches,
and a width of 6 feet, accomplished this action.
In summary, we are furnishing two (2) additional copies of the site plan and
details. I have also revised our rip rap apron detail to show that it will function as a
level spreader.
Please continue with your review as soon as possible. We need to obtain this
stormwater permit and resolve the wetland situation. Please contact me if you have
any questions.
JSH/pat
attachments
cc: Mr. Rick Shiver
Mr. Bill Buchanan
Mr. John Dorney
Sincerely,
JOSEPH S. HILL, JR. and ASSOCIATES
?1r1&Q_4S . /Ld4
Joseph S. Hill, Jr., P.E.
JF2/SMLEW I S4

f
STILL MEADOW VILLAGE STORMWATER
D E C Wetlands Enhancement/Stormwater Management E I V ED
Water Volume Calculations NOV 21 1997
D E M
PROJ #
1. Direct runoff volume equivalent to pre -construction flow rate from the site for a
1-inch storm event:
Original drainage area to run of "Blue -Line Stream" at west edge of property =
15.55 Acres
43,560 SF/AC x 15.55 AC x 0.083' x 0.2 (runoff coefficient) = 11,244 CF (Pre -
Development Flow)
2. Divert flow from developed areas to Wetland "A" (see color -coded plan):
Total Drainage Area - 198,350 SF
Impervious Area = 4 "A" Buildings @ 4,000 SF = 16,000 SF
2 "B" Buildings @ 5,000 SF = 10,000 SF
Streets & Parking = 12,725 SF
Sidewalks (305 LF x 6' W) = 1,830 SF
Total Impervious Area = 40,555 SF
Pervious Area = 198,350 SF - 40,555 SF = 157,795 SF
40,556 SF x 0.083' = 3,366 CF (Impervious)
157,796 SF x 0.083' x 0.2 = 2 6 19 CF (Pervious)
Post -Development Flow = 5,985 CF (To Wetland "A")
3. Divert flow from developed areas to Wetland "B" (see color
-coded plan):
Total Drainage Area = 179,325 SF
Impervious Area = 4 "A" Buildings @ 4,000 SF
- 16,000 SF
2 "B" Buildings @ 5,000 SF
= 10,000 SF
Community Building
= 2,160 SF
Pool Apron
= 7,100 SF
Streets & Parking
= 10,425 SF
Sidewalks (445 LF @ 6'W)
= 2,670 SF
Total Impervious Area
= 48,356 SF
Pervious Area = 179,325 SF - 48,355 SF = 130,970 SF
JF2/SMVOLCAL - 1 of 2-

48,355 SF x 0.083' = 4,013 CF
130,970 SF x 0.083' x 0.2 = 2,174 CF
Post -Development Flow = 6,187 CF (To Wetland "B")
Pre- and Post -development flow to wetlands:
Total Post -development flow to wetlands A & B =
= 5,985 CF + 6,187 CF = 12,172 CF
Post -development flow (12,172 CF) is equivalent to Pre -development flow
(11,244 CF) and will therefore be adequate to sustain the wetlands remaining
on -site after development.
JF2/SMVOLCAL - 2 of 2 -

78

7.54
P P _
Erosion and Sediment Control Handbook
30.
i
00 + L. 30
Outlet
1 to 90
pipe L•^i aPt00 25 K 80
diameter 0, e ot
JM at 70
80
��`� Z0 �+9
e
15 50
v n
40 mm u a 4 1.2
m u
10 30
m w m 9974
1.DE
v—n_
- - ,- 20 3� 0.9 S
0.8
_sO L^ m N N , "
Q.
L a,- a� n--—�J'—' �'Lp a .a 2 a 0.8CL
a m i; a.5 i=
Cc Co u m 04
d'"s a Q c ^-~ u �a 1 0.3
I da12 v c is ua u " a�j 0.2
r i r r r r I r r 0
3 5 10 - 20 50 100 200 500 1000
K) ` Discharge, ft3hec
(� 1X�6YG>a 0.1 0.2 0.3 0.4 0.6 0.8 1 2 3 4 5 6 7 8 10 15 2025
Discharge, m3/sec
Fig. 7.45 Design of riprap outlet protection from a round pipe flowing full; minimum
I.Sos tailwater conditions. (6, 14)
aci de,►.�
to find the riprap size and apron length. The apron width at the pipe end should
be 3 times the pipe diameter. Where there is a well-defined channel immediatgly
downstream from the apron, the width of the downstream end of the apron
should be equal to the width of the channel. Where there is no well-defined chan-
nel immediately downstream from the apron, minimum tailwater conditions
apply and the width of the downstream end of the apron should be equal to the
pipe diameter plus the length of the apron.
EXAMPLE 7.4 Riprap Outlet Protection Design Calculation for Minimum
Tailwater Condition
Given: A flow of 6 W/sec (0.17 m°/sec) discharges from a 12-in (30-cm) pipe onto a 2
percent grassy slope with no defined channel
Find: The required length, width, and median stone size dw for a riprap apron.
1L'"P-RAA Dfetr.061ONS,
3 Do = 3 K 12�"�inW tcS� 'Rp R°P •�
rWcj V",+ L;p = Iz"+ 5" = ra A °"
V.a-o=0,5 OK

Nov 13 '97 10:36
0 K (017)
State offal Cari�I
Department ofEnviro==L and \A - nuai Resom=s
Nyffin p6a R cdwal Office
James B. Hunt, Governor Rra6ll= McDeSft� S==.Y
FAX COVR SHEET
Date: 11 ' 13
'r-
To: —Jill 'nk
fAX
No. Of Pages.
co-.
127 Cardinal Drive Extension, Wilmington. I%LC 2840��"5-3m Fan {@glb� D-21A,g
An Equal Qpportuz&7 A�irirurl-W Autipa tv* .•tom

4,a5tA7E o
VwM
State Of North Carolina
Department of Environment and Natural Resources
James B. Hunt, Jr.
Governor
Mr. Bill Buchanan
South College Associates
298 North Front Street, Suite 309
Wilmington, NC 28401
Dear Mr. Buchanan:
Wilmington Regional Office
Division of Water Quality
Water Quality Section
October 6, 1997
Subject: Meeting Synopsis
Still Meadow Village
Stormwater Project No.
New Hanover County
Wayne McDevitt
Secretary
970726
Per our meeting of Friday, September 26,,1997, we discussed with your engineer, Joseph Hill, P.E.,
the options available to you for meeting the stormwater requirements of North Carolina and for preserving
the natural wetland located on this site. It is intended that the runoff from portions of the parking or
buildings (preferably parking due to a wetlands ability to assimilate hydrocarbons better than ponds), either
sheet flow or be collected and directed into the wetland areas in a non -erosive manner, ie., through use of
a level spreader or other acceptable flow distribution device.
The amount of runoff to be directed into the wetland was agreed to be a volume equivalent to the pre -
construction flow rate from the site for a 1 " storm event. This rate appears to be the minimum that will keep
the wetland functioning. All overflows from the wetland in excess of the design storm will be directed into
the detention pond.
While Mr. Dorney may not require any changes to the plan in the future if this experiment fails, I
feel that in order to maintain water quality, the permit must still hold a condition that if the treatment system
fails, either it will be rebuilt to design standards or another treatment system will be constructed. The
experimental nature of the system cannot exempt anyone from providing stormwater control should the
system fail. In this particular case, the flow from the wetland eventually goes through the pond, so making
the system work in case the wetland fails should not be a problem.
127 Cardinal Drive Extension, Wilmington, N.C. 28405-3845 • Telephone [phone] • Fax [phone]
An Equal Opportunity Affirmative Action Employer

Bill Buchanan
October 6, 1997
Stormwater Permit No. SW8 970726
If you have any questions, please do not hesitate to call me at [phone].
Sincerely,
Linda Lewis
Environmental Engineer
RSS/arl: S:\WQS\STORMWAT\LETTERS\970726.00T
cc: John Dorney, DWQ 401
Joseph Hill, P.E.
Jilll Hickey, DOJ
S : ii n_7_ i P r� itI

State of North Carolina
Department of Environment
and Natural Resources
Wilmington Regional Office
James B. Hunt, Jr., Governor
Wayne McDevitt, Secretary
Division of Water Quality
November 6, 1997
Mr. Mike Marsh, P.E.
1602 Harbour Drive
Wilmington, NC 28401
Subject:
Dear Mr. Marsh:
! 0•
EL
�r �
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
ACKNOWLEDGEMENT OF RECEIPT AND
REQUEST FOR ADDITIONAL INFORMATION
Stormwater Project No. SW8 970726
Still Meadow Village
New Hanover County
The Wilmington Regional Office received a Stormwater Management Permit Application for Still
Meadow Village on October 16, 1997. A preliminary review of that information has determined that the
application is not complete. The following information is needed to continue the stormwater review:
Provide level spreader mechanisms at each swale inlet to the wetland to prevent a
concentrated discharge into the wetland. I have enclosed a detail from the BMP guidance
booklet. Add this detail to the plans, and note the locations/elevations of the spreaders on the
plans. The fact that the swales have a non -erosive flowrate is not a reason for deleting the
agreed upon spreaders.
2. Provide 2 copies of the detail sheet including the a pond/forebay section and outlet structure
detail. None of the plans submitted to date show any details.
3. Please seal the wetland design calculations.
127 North Cardinal Dr., Wilmington, North Carolina 28405 Telephone [phone] FAX [phone]
An w- ..1 A.. ..rt7.ia_. Art_. -ae_ y _ _ r_. r

Mr. Marsh
November 6, 1997
Stormwater Project No. SW8 970726
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 December 6, 1997, or the application will
be returned as incomplete. The return of a project will necessitate resubmittal of all required items, including
the application fee.
If you have any questions concerning this matter please feel free to call me at [phone].
Sincerely,
A! ��' �- A � �'
Ms. Linda Lewis
Environmental Engineer
RSS/arl: S:\WQS\STORMWAT\ADDINFO\970726.NOV
cc: John Dorney, Wetlands Group
Linda Lewis
Central Files
2

JOSEPH S. H1114 JIL AND ASSOCIATES
CONSULTING ENGINEERS and PLANNERS
16M HARBOUR DRIVE
WUMMOTON, NORTH CAROLINA
TELEPHONE 910-T99-1544
October 16, 1997
Ms. Linda Lewis
N.C.D.E.M.
127 Cardinal Drive Extension
Wilmington, North Carolina 28405
Subject: Still Meadow Village
Wetlands Enhancement
Stormwater Project No SW8 970726
New Hanover County
Dear Ms. Lewis:
MAILINGADDRESS:
POST OFFICE BOX 5592-STA.1
WUMINNGTON, NC 284034155
STORMWATER
fl E C E I V El
OCT
161997
PROJ
' 2<0
As a result of our on -site meeting with Bill Buchanan and John Dorney on
September 26, 1997, we have revised the subject stormwater plan.
The objective is to divert the equivaient flow voiume from a 1-inch storm
event on the undeveloped site to the wetlands remaining after the site is developed.
This will provide enhanced water flow into the wetlands to keep them viable after the
development is complete and will also provide a large amount of pre-treatment, since
all excess water will be collected and treated in the storwmater detention pond after
flowing through the wetlands and prior to discharge off -site. The entire runoff flow
from the site will still be treated in the pond as shown in the previous submittals and
application. Rooftop runoff will be diverted through gutters into the swales between
buildings. Street runoff will be diverted through flumes into swales that discharge to
the wetlands. Since no area discharges more than 1.5 CFS, the swales will have
non -erosive velocity in accordance with the calculations submitted with the erosion
control plan. Rip rap aprons will be placed at flume outlets.
Enclosed are three (3) copies of the revised plans and wetlands enhancement
calculations. Please include these items in our original permit application package
and continue your review.
Please contact me if you have any questions.
JSH/pat
attachments
Sincerely,
JOSEPH S. HILL, JR. and ASSOCIATES
Joseph S. Hill, Jr., P.E.
JF2/SMLEW I S3

1.
2,
3.
STORMWATER
STILL MEADOW VILLAGE
Wetlands Enhancement/Stormwater Management H
- C E I V E
Water Volume Calculations OCT 161997
D
PROJ #
t012G
Direct runoff volume equivalent to pre -construction flow rate from the site for a
1-inch storm event:
Original drainage area to run of "Blue -Line Stream" at west edge of property =
15.55 Acres
43,560 SF/AC x 15.55 AC x 0.083' x 0.2 (runoff coefficient) = 11,244 CF (Pre -
Development Flow)
Divert flow from developed areas to Wetland "A" (see color -coded plan):
Total Drainage Area = 198,350 SF
Impervious Area = 4 "A" Buildings @ 4,000 SF
2 "B" Buildings @ 6,000 SF
Streets & Parking
Sidewalks (305 LF x 6' W)
Total Impervious Area
Pervious Area = 198,350 SF - 40,555 SF = 157,795 SF
40,555 SF x 0.083' = 3,366 CF (Impervious)
157,795 SF x 0.083' x 0.2 = 2 61 F (Pervious)
Post -Development Flow = 5,985 CF (To Wetland "A")
= 16,000 SF
= 10,000 SF
= 12,725 SF
= 1,830 SF
= 40,555 SF
Divert flow from developed areas to Wetland "B" (see color -coded plan):
Total Drainage Area = 179,326 SF
Impervious Area = 4 "A" Buildings 0-4,000 SF = 16,000 SF
2 "B" Buildings @ 5,000 SF = 10,000 SF
Community Building = 2,160 SF
Pool Apron = 7,100 SF
Streets & Parking 10,425 SF
Sidewalks (445 LF @ 6'W) 2,670 SF
Total Impervious Area = 48,355 SF
Pervious Area = 179,325 SF - 48,355 SF = 130,970 SF
JF2/SMVOLCAL -I of 2-

48,355 SF x 0.083' = 4,013 CF
130,970 SF x 0.083' x 0.2 = 2,174 CF
Post -Development Flow = 6,187 CF (To Wetland "B")
Pre- and Post -development flow to wetlands:
Total Post -development flow to wetlands A & B =
= 5,985 CF + 6,187 CF = 12,172 CF
Post -development flow (12,172 CF) is equivalent to Pre -development flow
01,244 CF) and will therefore be adequate to sustain the wetlands remaining
on -site after development.
JF2/SMVOLCAL - 2 of 2 -

State of North Carolina
Department of Environment, Health and Natural Resources
Wilmington Regional Office
James B. Hunt, Governor
Date: 10 (o
To: _$; 1 '�'12h 2Y1
CO: So . Co(j ec J45sc
FAX i 8 rl 34-
REMARKS:
FAX COVER SHEET
C 2sG.
Wayne McDevitt, Secretary
No. Of Pages: 3
From:
CO:
FAX#: [phone]
F5n-cj-?'q so U41 coo
127 Cardinal Drive Extension, Wilmington. N.C. 28405-3945 Telephone [phone] Fax [phone]
An Equal Opportunity Affirmative Action Employer

OK
Oct 6 '97 15:11
9-2518734
State of North Carolina
Department of Environment, Health and Natural Resources
Wilmington Region Office
Tames B. R=u .Governor
FAX
Date; ' P— (a'
To elk,h ail
CO. Sa . Ike. A5 �—
F.AX M. Z . L 8 r7 54-
REMARKS: Reese. rL54
Wayne McDevitt, Secretary
Sno
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127 Cardinal Drive txtenaiopw Wilmington..i.C.2i3 S_3#45 Telephone (910) 3PS-3900 FINS [phone]
AWF4uitl OpportunityAflfrioutive Aetion Employer
I

Oct 6 197 15:37
1 0 K 1 1 (017) 1
State of North Carolina
Department of Environment; Hekth and Natural Resources
Wilmington; Re onal Office
Jaines B. Hunt, Governor Wayne, McDevit(* SecretwT
FAX CO- SHEET
Date: Of Pages..
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Tb: Fro
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FAX 09-4,
127 Cardinal Drive ExLen.5108, WilmingtOnt N-Q '28
An Equal Opportunity
Telephone (919) 395moo Fax (910) 350,-2004
B Action Employer

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3-97 WED 14:00 WARD AND SMITH NEW BERN FAX NO, 919B262121 P,02
120 WC67 rIRE TOWER RDAD
POST OFFICE 90X 10oa
OREENVILLE, N.C. 2V285.6081
TELEPHONE (0n) 555-302c
PACSIMILc 1910) 7SG..$M69
UNIVERSITY CORPORATE CENTER
M RACINC DRIVE
POST OFFICE BOX 7009
WILMINGTON. N.C. 219409.7068
TrLa PHONC Colo) aa1.5100
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VIA TEI,,ECOPIER
WARD AND SMITH, P.A.
ATTORNEYS AT LAW
1001 COLLEGE COURT
11057 OFFICE SOX a87
NEW BERN. N,C. 26562-08gr
TELEPHONE [phone]
FACSIMILE (012: and-21e1
September 3, 1997
Jill Hickey, Esq.
North Carolina Department of Justice
8nvironmental Division
114 West Edenton street, Suite 311
Raleigh, North Carolina 27604
RE: 401 Certification - South College Associates
DWQ Projeot NO. 970075
Our File 97-0387 (A)
Dear Jill;
SUITE :40a
TWO HANNOvaFt BQUARE
FAYETY11VILLE STREET MA6L
POST OFFICE BOk 2091
RALEIGH,N.C.27502-2091
TELEPHONE (6:8) aaa. 16o0
FA126 MILE (910) 62E_1pg7
This morning I received a written regponee from our client's
engineer to John Dorney's August 1, 1997 letter (received in our
Office approximately August 15, 1997). While the basic concepts in
John's letter are acceptable to our client, our client's engineer
tells us that the proposed relocation of stormwater management
structures is both physically and economically difficult, if not
impassible (see enclosed letter). As I understand it, critical
issues identi>Eled by our client's engineer include: (a) difficulty
in routing water "uphill" to the locations proposed for retention
basins; (b) the use of multiple, smaller basins; (c) obtaining
approvals for modified plans from DWQ stormwater as well as the
federal Department of HUD; and (d) long term structural stability
concerns.
In an effort to xresolve this matter on a Slightly simpler basis,
and consistent with discussions at our July meeting and the intent
of John Dorney's august 1 letter, I would like to propose that DWQ
accept less intrusive modifications in the stormwater management
system for this site that wia.l continue to allow for hydrological
enhancement of the preserved wetland areas, Enhancement would be
accgmplished by minor rerouting of smaller amounts of stormwater
runoff (e.g., from rooftops) into the several on -site wetland
areas, without relocation of the main stormwater retention basin.
Thia way the water treatment. effects in the main basin will be
enhanced due to lower loadings while the amounts of water directed

3-97 WED 14:01 WARD AND SMITH NEW BERN FAX NO, 0198262121 P,03
' WARD AND SMITH, P.A.
Jill Hickey, Esq.
September 3, 1997
Page 2
into on -site wetland areas will be more precisely quantifiable,
thus avoiding hydrological Overloading of the wetlands.
Of equal importance to our client, these targeted, "low tech"
stormwater management plan modifications are more Likely to receive
timely approval from DWQ,s stormwater section, our client's lender
and the U.S. Department of HUD without excessive and expensive
project plan rewrites or excessive and expensive delays in the
various plan approval proces,jes.
I apologize for not being in a position to provide this information
and counter proposal to you sooner, but would appreciate your best
efforts to discuss this matter with your client and get back to me
as quickly as possible. Should it appear that we are near a final
settlement, z would think that we could wrap this matter up without
any further requests for stay or the need for filing of pre -hearing
Statements. [Even though the existing stay order expires tomorrow,
it does not require ally filing on our part until September 12th.]
Thank you in advance for your attention to this matter and 17ook
forward to continuing to work with you and your client to resolve
this mattax in the near future. With best personal regards, I
remain
You truly,
�^
r
I. Clark Wry' , Jr.
ICW;icw
WSMAIN/231430
Enclosure
Cc; Mr. William Suchanon
Mr. John Dorney

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JOSEPH S. HILL, JR AND ASSOCIATES
CONSULTING ENGINEERS and PLANNERS
16M HARBOUR DRIVE
WU.MINGTON, NORTH CAROLINA
TELEPHONE [phone]
August 25, 1997
Ms. Linda Lewis
N.C.D.E.M.
127 Cardinal Drive Extension
Wilmington, North Carolina 28405
Subject: Still Meadow Village
Stormwater Project No SW8 970726
New Hanover County
Dear Ms. Lewis:
MAILINGADDRFSS:
POST OFFICE Box 5592-S A. I
WnMMGTON, NC 28403-4155
RECEIVED AUG 2 9 1W
In response to your request for additional information regarding the Still
Meadow Village Stormwater Plan, we submit the following items:
Since the recommendations for wetlands enhancement stated in the
August 1, 1997 letter from John Dorney are impractical or impossible to
meet and would result in only a small reduction in mitigation costs, the
owner chooses not to proceed with the wetlands enhancement option
presented by Mr. Dorney. Please review the plan as originally
submitted.
2. A note is added to the plan requiring the use of rooftop gutter to route
flow to the streets, which then flow to the stormwater pond.
3. Typical parking lot width of 64' is shown on front of unit 2-13. Typical
sidewalk (6), parking bay (9' x 20') and single row parking lot (24')
widths are shown in the parking area southeast of unit 3-A.
4. Vicinity map is added to the plan.
5. The pond will be included in the recorded "blanket" access/drainage
easement which covers all drainage, utilities and site maintenance for
the project. Project consists of rental apartments owned by the
applicant.
6. A note is added to the plan stating that no off -site runoff contributes flow
to the wet detention pond.
Enclosed are four (4) copies of the revised plan.
JF2/SMLEW IS2

Ms. Linda Lewis
Still Meadow Village
August 25, 1997
Page 2
Please continue your review and contact us if you need further information.
JSH/pat
attachments
Sincerely,
JOSEPH S. HILL, JR. and ASSOCIATES
r
Josep S. Hill, Jr., P.E.
JF2/SMLEW IS2

State or North Carolina
Department of Environment, Health, and Natural Resources
Wilmington Regional Office
James B. Hunt, Jr. Division of Water Quality Wayne McDevitt
Governor Water Quality Section Secretary
August 20, 1997
Mr. Joesph Hill, P.E.
1602 Harbour Drive
Wilmington, NC 28401
Subject: ACKNOWLEDGEMENT OF RECEIPT AND
REQUEST FOR ADDITIONAL INFORMATION
Stormwater Project No. SW8 970726
Still Meadow Village
New Hanover County
Dear Mr. Hill:
The Wilmington Regional Office received a Stormwater Management Permit Application for Still
Meadow Village on July 23, 1997. A preliminary review of that information has determined that the
application is not complete. The following information is needed to continue the stormwater review:
1. Per the August 1, 1997 letter from John Dorney, please redirect the discharge from the pond
into the wetland, and provide an outlet for the wetland, so the runoff is not just recirculated.
2. Please note on the plans that the roof drainage is to be directed into the pond. Putting it in the
deed restrictions doesn't help much while the contractor is building them.
3. Please add the dimensions of the parking lot and sidewalks.
4. Add a vicinity map to the plans which reference SR numbers, NC Highway numbers, and a
city a town.
5. Locate the pond in a recorded access/drainage easement.
6. Have you considered off -site runoff? If no offsite runoff exists, please indicate on the plans.
127 Cardinal Drive Extension, Wilmington, N.C. 2M5-3845 • Telephone [phone] • Fax [phone]
An Equal Opportunity Affirmative Action Employer

Mr. Hill
August 20, 1997
Stormwater Project No. SW8 970726
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 September 20, 1997, or the application will
be returned as incomplete. The return of a project will necessitate resubmittal of all required items, including
the application fee.
If you have any questions concerning this matter please feel free to call me at [phone].
Sincerely,
Ms. Linda Lewis
Environmental Engineer
RSS/arl: S:\WQS\STORMWAT\ADDINFO\970726.AUG
cc: Linda Lewis
Central Files
127 Cardinal Drive Extension, Wilmington, N.C. 28405-3845 0 Telephone [phone] • Fax [phone]
An Equal Opportunity Active Action Employer

State of North Carolina
Department of Environment,
Health and Natural Resources •
Division of Water Quality
1
James B. Hunt, Jr., Governor AIIIIIIIIIIIIIiI ILWayne McDevitt, Secretary 0Y° p E H N
A. Preston Howard, Jr., P.E., Director
August 1, 1997
MEMO
TO: Clark Wright
FROM: John Dorneyf�," 6
RE: South College Associat s
401 Water Quality Certification
New Hanover County
DWQ # 970075
Thank you for your letter of 1 July 1997 and for o„r fbIllownp, meeting of 29 Ttxly 1997,
have reviewed the relevant regulations and believe that the following change can be made in the
401 Certification in accordance with 15A NCAC 2H .0506(h).
The project was approved on 7 May 1997 to fill 2.37 acres of wetlands. After reflecting
on your client's proposal to permanently preserve the 4.19 acres of remaining wetlands on -site, I
believe that the following plan is consistent with our rules. If Mr. Buchanan is willing to direct
stormwater from the site into the undisturbed wetlands on -site (after treatment in a wet or dry
stormwater basin to remove some pollutants and to prevent erosion in the wetland), the water
storage and pollutant removal functions of this wetland would be enhanced. Therefore DWQ
could count the 4.19 acres of remaining wetlands as enhancement which would result in 1.05
acres of credit (enhancement is debited at 4:1 according to 15A NCAC 2H .0506(h)). This effort
would require a modification of the stormwater management plan to relocate your proposed
stormwater pond to upland locations south of the parking/building sites (areas apparently
presently not planned to be developed).. As to the preservation of the enhanced 4.19 acres of
wetlands, a conservation easement (which you indicated you are interested in) would be needed
which would require a survey of the wetlands on which the easement would be placed, the signed
easement itself as well as an attorney's opinion regarding the title of the property. This plan
would leave a requirement for 3.69 acres of mitigation for which you indicated you are interested
in utilizing the Wetland Restoration Program at $12,000 per acre (total of $44,280).
Environmental Sciences Branch • 4401 Reedv Creek Road • Raleigh, North Carolina 27607
Telephone [phone] FAX # [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/10% post consumer paper

In summary:
Fill of 2.37 acres of wetlands within 150 feet of "blue line" waterbody (2:1 ratio)
necessitates 4.47 acres of mitigation.
Enhancement of or,site wetlands +witi'i stormwater: 4.19 acres divided by 4:1 ratio
yields 1.05 acres of mitigation credit.
Therefore: 4.74 acres needed
- 1.05 acres enhancement credit
3.69 acres of mitigation purchased from WRP
I believe that this solution is 1) consistent with our wetland rules, 2) gives a benefit to Mr.
Buchanan for the on -site wetlands not being filled, 3) provides a water quality benefit with respect
to filtering the runoff from this site and 4) provides financial relief to Mr. Buchanan compared to
our 7 May 1997 Certification. Please call me at 919-733-1786 once you and your clients have a
chance to review this approach. If this plan is acceptable, we will need to modify the Certification
as well as the stormwater plan for this project.
Finally your stormwater plan shows a 24" stormwater pipe across the wetland areas to
carry stormwater to the proposed detention pond. We will need to discuss how this design affects
the conservation easement in terms of wetland impact and line maintenance. This activity will
likely require a Nationwide 12 Permit for utility crossings. Our General Certification (Number
3101) does not require written approval from DWQ as long as all the conditions are met.
970075.mit
Cc: Jill Hickey, Attorney General's Office
Unda T�; wis, I)WQ VViZ-,iington Regional Office
Jim Gregson, DWQ Wilmington Regional Office
Steve Tedder
A. Preston Howard, Jr.

I
.1UL 2 3 1%
JOSEPH S. HILL, JIL AND ASSOCIATES
CONSULTING ENGINEERS and PLANNERS
16M HARBOUR DRIVE
WU IINGTON, NORTH CAROU NA
TEIEPHONE 910.799-1544
June 18, 1997
Ms. Linda Lewis
N.C.D.E.M.
127 Cardinal Drive Extension
Wilmington, North Carolina 28405
Subject: Still Meadow Village
Stormwater Plan
New Hanover County
Dear Ms. Lewis:
MAILINGADDRESS:
POST OFFICE BOX 5592-STA.1
WIL►r NGTON, NC 2M34155
1661 c z inr
i
�TORMWATER
Enclosed are four (4) copies of the Stormwater Plan for Still Meadow Village.
Another copy of the plan is included showing the area draining to the stormwater
detention pond. outlined in colored pen.
A completed application form, fee of $386.00, calculations, and O&M schedule
are also enclosed.
Please review this plan as soon as possible.
Please call if you have any questions.
JSHlpat
attachments
Sincerely,
JOSEPH S. HILL, JR. and ASSOCIATES
Josep !S.Hill, Jr., P.E.
JF2/SMLEW I S 1

STORMWATER
N
STILL MEADOW VILLAGE D
JUL 2 31997
Stormwater Detention Pond Calculations
� E M
PROJ #38�2�
Stormwater runoff from the project will be retained in a wet detention pond.
This pond will store the runoff generated by 1 inch of rainfall. The stored runoff will
be discharged over a period of 3.6 days.
The pond area required to remove 90% of total suspended solids was
calculated using the SA/DA Percentage Chart (see chart) for North Carolina coastal
regions.
DETENTION POND
Runoff Calculations
Impervious Surfaces: Dwelling Units (9 x 4,000 SF + 6 x 6,000 SF
Picnic Shelter
Mail Box Shelter
Tennis Court
Pool Apron
Sidewalks (3,210 LF x 6' W)
Streets, Parking
Total Impervious Area
Pervious Surfaces (Grassed, Landscaped Areas) = 470,606 Sq. Ft.
10.80 AC.
66,000 SF
384 SF
= 200 SF
7,500 SF
7,100 SF
19,260 SF
= 174,625 SF
= 274,969 SF
274,969 Sq. Ft. x 0,083' Runoff = 22,823 CF
470,606 Sq. Ft. x 0.083' Runoff x 0.2 (R.O. Coefficient) = 7,812 CF
Total Runoff 0" Rainfall) = 30,636 CF
= 229,763 Gallons
Pond Surface area Q Storage Pool Elev. of 20.7' =
26,000 Sq. Ft.
Pond Surface area @ Permanent Pool Elev. of 19.4' =
23,260 Sq. Ft.
Average Pond Surface Area
= 24,625 Sq. Ft.
Pond Storage Volume = 1.3' depth x 24,625 Sq. Ft.
Solids Settling Area Calculations
Total watershed area = 17.12 AC.
Impervious % = 6.32 AC. _ 17.12 AC.
= 37%
Pond Depth = 5.0'
= 32,012 CF
= 240,090 Gall
CARp''•
� z
i f S L A L
8982
SA/DA% required for 90% solids removal (see chart) - 2.6% j'',•���°�JS'k�\��;;.•`�
2.6% x 17.12 AC. = 0.44A AC. = 19,427 Sq. Ft. ;r'isauine`'
112Z J 9'
JF2/SMSTWCAL - 1 of 4 -

Pond Surface Area 0 Permanent Pool Elev. of 19.4' = 23,250 Sq. Ft.
Pond is therefore adquate for 90% TSS removal.
Orifice Discharge Rate Calculations
Use 2 114" diameter orifice for outlet
Calculate average discharge rate and time to lower orifice head from 1.3' to 1.1':
0.2' pond height x 24,626 Sq. Ft. average pond area x 7.5 gallft3
= 36,938 Gallons Storage
Average head on orifice from 1.3' to 1. V = 1.2'
Average discharge rate 0 1.2' head:
Q(GPM) - (449)c A 2gh
Q(GPM) = Volume discharged in gallons per minute
c = discharge coefficient = 0.6
A = orifice area in square feet
g = gravity = 32.2
h = head above center of gravity
Q(GPM) _ (449)(.6)(.0276) (2)(32.2)(1.2)
Q = 66.4 GPM
Time required to lower pond 0.2' @ 1.1' average head:
T = 36,938 Gal. ` 66.4 GPM = 565 minutes
64.4 GPM vs 565 minutes plotted on curve (see discharge curve).
Discharge rate and time to lower head from 1.1' to 0.9':
Q = 59.7 GPM
T = 36,983 Gal.: 69.7 GPM = 619 minutes
59.7 GPM vs 1,184 minutes plotted on curve.
Discharge rate and time to lower head from 0.9' to 0.7':
Q=53.4GPM
T = 36,938 Gal. _ 53.4 GPM = 692 minutes
53.4 GPM vs 1,876 minutes plotted on curve.
Discharge rate and time to lower head from 0.7' to 0.6%
Q = 46.2 GPM
T = 36,938 Gal. = 46.2 GPM = 800 minutes
46.2 GPM vs 2,676 minutes plotted on curve.
JF21SMSTWCAL - 2 of 4 -

Discharge rate and time to lower head from 0.5' to 0.3':
Q=37.7GPM
T = 36,938 Gal. _ 37.7 GPM = 980 minutes
37.7 GPM vs 3,656 minutes plotted on curve.
Discharge rate and time to lower head from 0.3' to 0.1':
Q=26.7GPM
T = 36,938 Gal. = 26.7 GPM = 1,383 minutes
26.7 GPM vs 5,039 minutes plotted on curve.
The outlet structure will discharge the total calculated runoff volume of 229,763
gallons in approximately 3.6 days (see Orifice Discharge Curve).
JF2/SMSTWCAL - 3 of 4 -

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STILL MEADOW VILLAGE
STORMWATER DETENTION POND
FOREBAY VOLUME CALCULATIONS
Provide Forebay Volume of 20% of the Total Runoff Volume.
Total Runoff ....................... = 229,763 Gallons
x 0.20
Required Forebay Volume.... = 45,953 Gallons
Forebay Dam Elev............... = 19.6'
Forebay Bottom Elev........... = 17.6'
Forebay Depth ..................... = 2.0'
Forebay Area @ Top of Dam = 4,275 SF
Forebay Area @ Bottom ...... = 2,835 SF
Average Area ...................... = 3,555 SF
Forebay Volume .................. = 2.0' x 3,555 SF
= 7,110 CF
= 53,325 Gallons
JF2/SMSTWCAL - 4 of 4 -

SA/DA - 85% TSS REMOVAL WITH 30' VEGETATIVE FILTER
37MPRER-% 3AFT 3.5FT 4.OFT 4.5FT 5.OFT 5.5FT 6.OFT 6.5FT 7.OFT_7.5FT
10%
.9
.8
.7
.6
.5
20%
1:7
1.3
1.2
1.1
1.0
.9
.8.
.7
.6
.5
30%
2.5
2.2
1.9
1.8
1.6
1.5
1.3
1.2
1.0
.9
40%
3.4
3.0
2.6
2.4
2.1
1.9
1.6
1.4
1.1
1.0
50%
4.2
3.7
3.3
3.0
2.7
2.4
2.1
1.8
1.5
1.3
60%
5.0
4.5
3.8
3.5
3.2
2.9
2.6
2.3
2.0
1.6
70%
6.0
5.2
4.5
4.1
3.7
3.1
2.9
2.5
2.1
1.8
80%
6.8
6.0
5.2
4.7
4.2
3.7
3.2
2.7
2.2
2.0
90%
7.5
6.5
5.8
5.3
4.8
4.3
3.8
3.3
2.8
1.3
100%
8.2
7.4
6.8
6.2
5.6
5.0
4.4
3.8
3.2
2.6
SA/DA - > 90% TSS REMOVAL
FOR WET DETENTION WITHOUT VEGETATIVE FILTER
ER.% 3.OFT 3.5FT 4.OFT 4.5FT15.OFTJ5.5FT
10%
1.3
1.0
.8
.7'-`.6
.5
20%
2.4
2.0
1.8
1.7
1.5
1.4
30%
3.5
3.0
2.7
2.5
2�.
1.9
40%
4.5
4.0
3.5
3.1
2.8�'
2.5
50%
5.6
5.0
4.3
3.9
3.5
3.1
60%
7.0
6.0
5.3
4.8
4.3
3.9
70%
8.1
7.0
6.0
5.5
5.0
4.5
80%
9.4
8.0
7.0
6.4
5.7
5.2
90%
10.7
9.0
7.9
7.2
6.5
5.9
100%
12.0
10.0
8.8
8.1
7.3
6.6
.OFT 6.5FT 7.OFT 7.5FT
.4
.3
.2
.1
1.2
1.0
.9
.6
1.6
1.3
1.1
.8
2.1
1.8
1.4
1.1
2.7
2.3
1.9
1.5
3.4
2.9
2.4
1.9
3.9
3.4
2.9
2.3
4.6
4.0
3.4
2.8
5.2
4.6
3.9
3.3
5.8
5.1
4.3
3.6
379, 1-41PFF-L"006'
$,f/bg % it 7-G

ENGINEERING & FAciu nES APPLICATION FOR PERMIT FORA
w�,LAND-DISTURBING ACTIVITY Tile Number
y't UNDER THE CONDITIONS SET -FORTH BY 15 Q dD
• THE NEW HANOVER COUNTY Fee Paid
�. SOIL EROSION AND SEDIMENTATION CONTROL ORDINANCE r7l2 Z� —J
Date f
Applicant: South College Associates Applicant's Agent: Joseph S. Hill, Jr, and Assoc.
Address: P. 0. Box 601 Address: 1602 Harbour Drive
Wilmington, N.C. 28402 Wilmington, N.C. 28401
Telephone Number: [phone] Telephone Number. [phone]
Total Acres of Land Disturbance: 5.6 Purpose of Development: Residential
Location and Description of Land Disturbance:
Temoorary drainaae ditchag and cnoil stnraup arm .
STATEMENT OF FINANCIAL RESPONSIBILITY
Land owner(s) of Record Person or firm(s) financially responsible for the
land -disturbing activity. If not a North Carolina
resident you must have a N.C. agent (List Below)
Name: South College Associates Name:__ South CoUeae Associates
Address: P.O. Box 601 Address: P.O. Box 601
Wilmington, N.C. 28402 Wilminaton. N.C. 2840
Telephone Number: [phone] Telephone Number: [phone]
Location of deed(s) or instrument(s): County New Hanover Book 1417 Page 1305
The above information is true and correct to the best of my knowledge and belief and was provided by me while undar oath.
(T his form must be signed by the financially responsible person if an individual and by an officer, director, partner, attorney -in -
fact, or other person of authority to execute instruments for the financially responsible person if not an individual.) I agree to
provide corrected information should there be any change in the information provided herein.
Date: t-P �` �� % 7 Name (Typ int) Wi 11 i am H. Buchanan
Title: Partner
Signature:
a Notary Public of the County of—�/��tate of North
Carolina, her y certify that appeared personally before me this day and be-
ing duly sworn acknowledged that the above form was executed by him.
Seal Witness my hand and notarial seal, this / day r E 1 g
Notary
My commission expires T, �� _