SW8960611_HISTORICAL FILE_19980507

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW8
DOC TYPE
❑ CURRENT PERMIT
❑ APPROVED PLANS
HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
'M °I W 0 5 of
YYYYMMDD

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
May 7, 1998
Mr. Mark Kennedy, Owner
M&M Storage Buildings
420 Greenhill Road
Leland, NC 28451
NC00"ENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
Subject: Permit No. SW8 960611 Modification
M&M Storage
High Density Commercial Stormwater Project
Brunswick County
Dear Mr. Kennedy:
The Wilmington Regional Office received the Stormwater Management Permit Application for M&M Storage on February
2, 1998, with final information on March 26, 1998. 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 960611 Modification dated May 7, 1998, for the construction of M&M Storage.
This permit shall be effective from the date of issuance until May 7, 2008, 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, P.G.
Acting Regional Water Quality Supervisor
RSS/arl: S:\WQS\STORMWAT\PERMIT\96061LMAY
cc: Jay Houston, P.E.
Delaney Aycock, Brunswick County Inspections
Linda Lewis
CW.iltn i ngton-Regional _Office,
Central Files
127 Cardinal Dr. Ext., 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 960611 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
Mr. Mark Kennedy
M&M Storage
Brunswick County
FOR THE
construction, operation and maintenance of a 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 7, 2008 and shall be subject to the following specified
conditions and limitations:
I. DESIGN STANDARDS
1. This permit is effective only with respect to the nature and volume of stormwater described in the application and
other supporting data.
2. This stormwater system has been approved for the management of stormwater runoff as described on page 3 of this
permit, the Project Data Sheet. The stormwater control has been designed to handle the runoff from 113,030 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.
PA

State Stormwater Management Systems
Permit No. SW8 960611 Modification
DIVISION OF WATER QUALITY
PROJECT DATA SHEET
Project Name:
M&M Storage
Permit Number:
960611 Modification
Location:
Brunswick County
Applicant:
Mr. Mark Kennedy, Owner
Mailing Address:
M&M Storage Buildings
420 Greenhill Road
Leland, NC 28451
Application Date:
February 2, 1998
Water Body Receiving Stormwater Runoff:
Town Creek
Classification of Water Body:
"C Sw"
If Class SA, chloride sampling results:
n/a
Pond Depth, feet:
4.5
Permanent Pool Elevation, FMSL:
11.7
Total Impervious Surfaces, ft2:
113,030
Outparcels, ft2
n/a
Future, ft2
n/a
Offsite Area entering Pond, ft2:
rerouted, per Engineer
Required Surface Area, ft2:
9,042
Provided Surface Area, ft2:
9,121
Required Storage Volume, ft3:
9,019
Provided Storage Volume, ft3:
9,279
Temporary Storage Elevation, FMSL:
12.6
Controlling Orifice:
1.5"$ pipe
91

State Stormwater Management Systems
Permit No SW8 960611 Modification
5. Runoff from all of the built -upon area on the project must be directed into the permitted stormwater control system.
6. The permittee is responsible for verifying that the proposed built -upon area does not exceed the allowable built -
upon area.
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.
In addition, the Director may determine that other revisions to the project should require a modification to the
permit.
The Director may notify the permittee when the permitted site does not meet one or more of the minimum
requirements of the permit. Within the time frame specified in the notice, the permittee shall submit a written time
schedule to the Director for modifying the site to meet minimum requirements. The permittee shall provide copies
of revised plans and certification in writing to the Director that the changes have been made.
II. SCHEDULE OF COMPLIANCE
The permittee will comply with the following schedule for construction and maintenance of the stormwater
managemenrsystem:
The stormwater management system shall be constructed in it's entirety, vegetated and operational for its
intended use prior to the construction of any built -upon surface except roads.
b. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be
repaired immediately.
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.
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.
Decorative spray fountains will not be allowed in the ponds.
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.
13

State Stormwater Management Systems
Permit No. SW8 960611 Modification
6. Upon completion of construction, prior to issuance of a Certificate of Occupancy, and prior to operation of this
permitted facility, a certification must be received from an appropriate designer for the system installed certifying
that the permitted facility has been installed in accordance with this permit, the approved plans and specifications,
and other supporting documentation. Any deviations from the approved plans and specifications must be noted on
the Certification.
A 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.
8. 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 the property.
I1I. 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.
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.
The permittee grants DENR Staff permission to enter the property for the purpose of inspecting all components
of the permitted stormwater management facility.
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 7th day of May, 1998.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
t - A. Preston Howard, Jr., P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission
Permit Number SW8 960611 Modification

State Stormwater Management Systems
Permit No. SW8 960611 Modification
M&M Storage
Stormwater Permit No. SW8 960611 Modification
Brunswick County
Engineer's Certification
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,
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:
SEAL
Signature
Registration Number
Date

f
DfVISION OF WATER QUALITY
NORTH CAROLINA STORMWATER NLI,NAGENIENT PERAUT APPLICATION
L GENFERAL INFORNLATION
t Please pro[ dearly or typo
1. Project Name M & M Storage Buildings
2. Location, directions to project (include County, Address, State Road) Attach map. Brunswick County
Winnabow, US 17, Approximately 1/- miles Northeast of Winnabow, NC
3. Owner's Name Mark Kennedy
4. Owner's Mailing Address 420 Green Hill Road
City Leland
Phone [phone]
State NC Zip 28451
5. Nearest Receiving Stream Town Creek Class
6.Project description Addition to MGK Inc. Storage Buildings, 7 additional storage
buildings with associated loading area are to be added to the 4 existing buildings &
storriwater�__ppoond is to be expanded.
H. PEP-NETLVFORNIATION
1.Permit No.(rabepuedinb Dwq) P&06 // �4a
2. Application Date 1 /27/ 7 FeeenclosedS 385.00
3. Permit New Renewal r -X—Modification (existing Permit No.) SW8 9501611` _J
4. Project Type: _Low Density X Detention—InfiltrationRedevelop_ General_Alte- Offsite
5. Other State/Federal Permits/Approvals Required (C,eck appropriate blanks)
CAtNIA Major Sedimentation/Erosion Control X 404 Permit
III. BUILT UTON AREA (Please see NC4C 2H.1005 thra .1007 for applicable density limits)
Classification
Existing Built -upon Area
Proposed Built -upon Area
Total Project Area
o Built -upon Area
Drainage Drainaee
Basin Basin
CSw
1.03 Ac.
1.565 Ac.
2.985 Ac.
86.9 %
IV. STORtNIWATER TREATMENT (Describe now the ntnofJ will he treated)
Breakdown of Impervious Area
(Please indicate below the design impervious area)
Buildings 0.88 Ac.
Streets 1.71 Ac.
Parkin;/SW
(gar
(gar 0.005 Ac.
Totals 9-Fq5 Ar,-
Detention Pond

1�!
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.
OWNER'S CERTIFICATION
1. Mark uonnaAy — Owner cer ife that the information included on :his permit
(Please prim clearly or rype)
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.
Owner/Authorized Agent Signature and Title
/-07- 98
Date
VU. AGENT AUTHORIZATION (Please fill in the name of the engineer/surveyor audtonzed io submit plans on the o. er's behalf.)
Person or firm name Houston and Associates, P.A.
Mailing Address Post Office Box 2927
City shallotte State NC Zip 28459 Phone [phone]
Please submit application, fee, plans and calculations to the appropriate Regional Office.
cc: Applicant/WiRO//Central Files
j�ECEIVE
luny{ MAR 2 61998 D
D E M
PROJ #
Office use only
uRMWATEH
E C E I V E
FEB 0 21998 D
PROJ # �s1.�.1 Ttoo(oI I MOO

HOUSTON and ASSOCIATES, P.A.
Consulting Engineers
SHALLOTTE, NORTH CAROLINA 28459
Telephone [phone] !'r
Facsimile [phone] CE
rVED
MAR 2 6 1998
Ms. Linda Lewis, Environment
Division of Environmental Management
North Carolina Department of Environment,
Health, and Natural Resources
127 Cardinal Drive Extension
Wilmington, North Carolina 28405
117 Pine Street
Post Office Box 2927
Monday, March 23, 1998
Subject: M & M Storage Buildings, Phase II
Brunswick County, North Carolina
Resubmittal/Modification of Stormwater Plan for Approval
Stormwater Project No. SW8 960611
Dear Ms. Lewis:
In response to your letter dated March 16, 1998 we offer the following:
1. Forebay sizing calculations have been sealed and added to the
calculations.
2. The labeling of Lot 9 for Forest Landing Subdivision was a mistake and
should have been eliminated. The subject project extends well into the
previous Lot 9 and it not longer exists. The plans have been revised to
show the Forest Landing Subdivision Lot 10 property line.
3. The inlet pipe has been relocated of the revised plans.
4. Mark Kennedy's title of Owner has been added to the application.
We appreciate your attention in this matter. Should you have any
comments or require any additional information, please do not hesitate to
contact our office at your convenience.
iuston, P.E.
and Associates, P.A.
JRH/swq
Enclosures
pc: Mr. Mark Kennedy
File; 98-0452-2 (M&M Storage Buildings Phase II, SW/EC)

Hydrologic and Hydraulic Calculations
for
T )m ofnT -p) o Tj? a o —Inggp
LP
BRUNSWICK COUNTY, NORTH CAROLINA
s
y STORMWA I ER
'1 20 DECEIVE
MAR 2 6 1998 D
Prepared By RROJ N D E�
CONSULTING ENGINEERS
Shallotte, North Carolina
January 1998

MN Storage Buildings
Drainage Basin Data
1 /22/98
Prepared By: SWO .
Checked Bya
vzv/59
BASIN
I.D.
ROADWAY
IMPERVIOUS AREA
BUILDINGS
OFFICE
TOTAL
AREA
TOTAL
IMPERVIOUS
WEIGHTED
(AC)
(AC)
(AC)
(AC)
(AC)
A
0.407
0.265
0.000
0.687
0.672
0.93
B
0.138
0.096
0.000
0.234
0.234
0.95
C
0.220
0.162
0.000
0.382
0.382
0.95
D
0.944
0.358
0.005
1.682
1.307
0.78
Total:
1.709
0.881
0.005
2.985
2.596

M:±iln Storage Buildings
Storm Drainage Flowrate Calculations
1 /22/98
Prepared By: SWQ .
Checked By:/
Ih 10o
Storm Drain
Contributing
Drainage
Impervious
Weighted
Length
Slope
'Tc
i10
010
I.D.
Area
Area
Area
"C"
ac.
ac.
ft
ft/ft
min.
in/hr
cfs
SD1
A,13
0.92
0.91
0.94
200
0.005
1.77
7.0
6.05
SD2
A
0.69
0.67
0.93
200
0.005
1.77
7.0
4.49
SD3
C
0.38
0.38
0.95
200
0.005
1.77
7.0
2.54
'Tc multiplied by 0.5 for flow over asphalt.

IN10 Storage Buildings
Grate Inlets���
1/22/98 Ifz�/5y
Inlet Grate Hydrology & Hydraulics
Check most critical catch basin. Inlet grate sized for most
critical basin will be suitable for all basins.
10-Yr Flowrate: 4.49 cfs
Minimum Perimeter grate with head limited to 0.6 feet:
P = Q / (C'HA1.5) where C=2.5
Perimiter: 3.9 Feet
Minimum Open area of grate with head limited to 0.6 feet:
A = Q / C'(2'g'H)A0.5 where C=0.6
Open Area: 1 .2 fF

M M Storage Buildings
Storm Drainage Inverts
1 /28/98
Prepared By: SWQ .
Checked By: /? P
Storm Drain
Length
Inv. In
Inv. Out
( Grate Elev.
Culvert Diam.
I.D.
Feet)
(msf)
(msI)
at Inv. In
Inches
SD1
33
10.20
10.00
13.80
18
SD2
108
10.50
10.20
13.80
18
SD3
31
10.50
10.20
13.80
15

SD1
HEADWATER ELEVATION CALCULATIONS
FLOWRATE =
MANNINGS n =
DIA. FOR CULVERT PIPE _
DIA FOR RISER=
LENGTH OF CULVERT PIPE =
INV. IN ELEV. OF CULVERT =
INV. OUT ELEV. OF CULVERT=
INLET COEF. FOR CULV. PIPE FLOW =
INLET COEF. FOR CULVERT INLET CONTROL
RISER WEIR ELEVATION=
WEIR FLOW COEF. =
TAILWATER ELEVATION =
SD2
ELEVATION CALCULATIONS
M fM Storage Buildings
Culvert Hydraulics
1/22/98
(
INCHES
Prepared By: SWQ .
Checked By:: 1i>:,,.
HEADWATER ELEVATION ASSUMING INLET
INCHES HEAD = 0.51
FEET HEADWATER ELEVATION = 11.46
FEET
FEET
HEADWATER ELEVATION ASSUMING PIPE FLOW
FEET HEAD = 0.37
HEADWATER ELEVATION = 13.67
FEET
3.42 FPS
FLOWRATE=
4:49
CFS
0ANNINGS n =
0 0 L2
)IA. FOR CULVERT PIPE =
1 8
INCHES
)IA. FOR RISER =
' h-4 .'0
INCHES
_ENGTH OF CULVERT PIPE =
108 FEET
NV. IN ELEV. OF CULVERT =
10.50. FEET
NV. OUT ELEV. OF CULVERT =
10.20 FEET
NLET COEF. FOR CULV. PIPE FLOW
NLETCOEF. FOR CULVERT INLET CONTROL = j0'6
RISER WEIR ELEVATION ='
rn 0 00
FEET
NEIR FLOW COEF.
fAILWATER ELEVATION =
13.67 FEET
/ELOCITY=
2.54 FPS
HEADWATER ELEVATION ASSUMING WEIR FLOW
HEAD = #DIV/01
HEADWATER ELEVATION = #DIV/01
HEADWATER ELEVATION ASSUMING INLET
HEAD = 0.28
HEADWATER ELEVATION = 11.53
HEADWATER ELEVATION ASSUMING PIPE FLOW
HEAD = 0.32
HEADWATER ELEVATION = 13.99
HEADWATER ELEVATION ASSUMING WEIR FLOW
HEAD =
#DIV/0!
— #DIV/0!

ELEVATION CALCULATIONS
f LUVVNA I t =
MANNINGS n =
DIA. FOR CULVERT PIPE _
DIA. FOR RISER =
LENGTH OF CULVERT PIPE _
INV. IN ELEV. OF CULVERT =
INV. OUT ELEV. OF CULVERT =
INLET COEF. FOR CULV. PIPE FLO1
INLET COEF. FOR CULVERT INLET
RISER WEIR ELEVATION =
WEIR FLOW COEF. _
TAILWATER ELEVATION =
VELOCITY=
Mf m Storage Buildings
Culvert Hydraulics
1/?7/QR
OFS
INCHES
7E]INCHES
31-FEET
FEET
FEET
Prepared By: SWO .
Checked
HEADWATER ELEVATION ASSUMING INLET
HEAD = 0.18
HEADWATER ELEVATION = 11.31
HEADWATER ELEVATION ASSUMING PIPE FLOW
FEET HEAD = 0.14
HEADWATER ELEVATION = 13.44
a
r �
HEADWATER ELEVATION ASSUMING WEIR FLOW
HEAD = #DIV/0!
HEADWATER ELEVATION = #DIV/0!

Outlet Protection
1 /28/98
Prepared By: SWQ
Checked By:
Storm Drain Pipe Flowrate Tailwater vs *D50
*La Width
3Do Dmax Apron
I.D. Diam. 1/2 Pie Diam.
Thickness
Inch) (CFS) (< or > Feet
Feet Feet
Feet Feet Feet
Pond Outlet12 0.25
9.2 10.2
3 0.375 0.563
See Figure 8.06a where Tailwater is < 1/2 Pipe diam.'
See Figure 8.06b where Tailwater is > 1/2 Pipe diam.
3Do
Outlet ,
Pipe
Apron Width
Diameter ,
(W)
Apron Length
(La)
2-7M

Stormwatar Pond Design
1 /28/98
Prepared By: SWQ
Checked By:.
Stormwater Pond Design
�h 11s2
M&M Storage Buildings -Phase II
Total Drainage Area: �':- 2 `965�`. �"
Acres
Impervious Area:
Storage Buildings-HI"',I* �0 881 "',.Acres
Office U� ',0 OO5r ,-
Acres
Parking/Roadway `1 709
Acres
Total: 2.595
Acres
% Imperivous: 86.9
%
Permanent Pool Depth 4 5
%TSS Removal 90%
SA/DA 6 95, `
Required SA: 9,037
SF
Runoff
Inches
"Simple Method"
R 0.83
Volume: 9,020
CF
Actual Normal Pool SAT' 9 2 JSF
(@ 11.T MSL)
SA @ Storage Pool � , S1 560 1
SF (@ 12.6- MSL)
Depth of Storage: 0.87
Feet
USE 0 9 '.!
Feet
,
Provided Storage: 9,279
CF
Pond Elevations:
Bottom Elev.:[...:, '
MSL
Permanent Pool: 1 1 .7
MSL
Storage Pool: 12.6
MSL
Flood Pool: 13.3
MSL
"Freeboard" Elev: 13.8
MSL

3 0
- _ - - I :F7
3 SFT
4 AT
1
5FT
- - - -
5. OFT
- - - -
- -
- '
-
-
- _.3
_._
1.1
1.0
_
_.0
6
2.4
2 s -
4 5
3.8
3.5
3.2 2.9
2.= 2.3
_.0
1.6
hot _.=
6.0
=.2
4.7
4.2 3 -
- 2 2.7
- 290%
-._
6.5
5.8
5.3
4.8 -. I
- =
-
AS :.
_ 7.4
6.8
6.2
5.6 5 C,
3.8
:.2
_.,
2.a
SA./DA. - > 90% TSS F i4Oi'
FOR WET DET-ENTTION WITHOUT F_LT--ER
- --= = 3 5=T -.OF_ 4 5FT 5. OFT 5.5F`7 0-- - J - , 5_,
7 6 i_
200 2.0 1.8 1.7 1.5 1.4 _2 1.0 .9 c
30, 1.1 3.0 2.7 2.5 2.2 1.9 -.= 1.3 1.1r
40' =.5 4.0 3.5 3.1 2.8 2.5 _.c _ _ 1
M 6.0 3.3 4.8 4.3 3.9 _ _ 9 - - �
7G 7.0 6 0 5.5 5.0 4 5 3.9 _.^. 2.9 2.3
SO 1.4 8.0 /.0 6.4 5./ 5.2 4.5 4.0 3.4 2.8
0 . o at 7 7 . 3 6 . E 5 . 2 5 . 1 4 . 3 3 C
. L
6.9
6. 9 9, > Sr. _> _5
8 �c�
6

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T+IS lS 6aFir7-C2 Tr+A&I THE d o d/j)
h-owL'VEx !7 tS EQutv000lcnrr j- %�xuroll-TA
T-rlc1jAf-
//fE' EXISTM lCr / / JZr I 'ttD FGK'1QAy i'i?
I

Stormwater Pond Design
1 /22/98
Prepared By: SWQ .
Checked By: z
M&M Storage�Buldlrigs Phase II °��
Runoff Hydrog�aph into SW Pond
(See Flowrate Calc. and Drainage Basin Data for Breakdown of Areas)
Curve Number Drainage Area Land Use
Soil Group NA
x
2.60 IflpeNlOUSs x
B
II 254.3
VIP" .61 as?tsL
0.39 >;:-ssed ;.
z6
1 23.8
Total: 2.985
Total: 278.1
Weighted Curve Number: 93.17
Runoff Volume: (Soil Conservation Service Method)
Storm Duration:!,,10 Yr 1 Hr,;"
Storm Rainfall:._,,.' . �, ,. 2, 81Inches
S: 0.73
Direct Surface Runoff: 2.08 Inches
Total Runoff: 22,523 CF
0.52 Ac-Ft
Peak Flowrate:
10 Yr Intensity: ^.-.: „ _Inches/Hour
Weighted "C": 0.85
10 Yr Peak Flowrate: 17.80 CFS
Basic Hydrograph:
Conversion Factors:
u: 0.000157 Ac-Ft/Unit
w: 0.1780275 CFS/Unit
k: 0.639 Min/Unit
112 .,�;

Stormwater Pond Design
1/22/98
Prepared By: SWo .
Checked By: ;4.- .
Time Min Flow CFS
0.0 0.0
1.9 0.9
4.5 2.7
6.4 6.2
8.3 10.0
10.2 13.7
11.5 16.0
12.8 17.3
14.7 17.8
17.3 17.1
19.2 15.1
21.7 12.8
25.6 8.9
30.0 5.9
33.9 4.3
38.3 2.8
42.8 2.0
53.7 0.7
63.9 0.0
Inflow Hydrograph
-
18.0
16.0
14.0
w 12.0
LL
v 10.0
m
ca
8.0
0
LL 6.0
4.0
2.0
0.0
0.0
10.0 20.0 30.0 40.0 50.0 60.0 70.0
Time (MIN)

Stormwater Pond Design
Pond Routing
1 /22/98 Prepared By: SWQ .
Checked By:�J r
M&M Storage Buildings -Phase II
Routing Table - SW Treatment Pond
AT USED IN STAGE -DISCHARGE -STORAGE
2 (min)
Time
(min)
n
In
(CFS)
In + In+1
(CFS)
2S/DT - On
(CFS)
2S/DT + On+1
(CFS)
On+1
(CFS)
1
0
1
2
2
1
3
4
3
2
8
4
4
6
4
6
16
12
12
8
5
1,0
24
28
28
0
10
6
14
31
52
52
12
7
17
35
83
83
��' G «`
14
8
18
35
118
118
16
9
17
32
152
153
18
10
15
29
180
184
`2_2
20
11
14
27
201
209
f
22
12
13
22
219
228
4 4
24
13
9
17
232
241
26
14
8
15
239
249
4w8
28
15
7
13
244
254
30
16
6
11
248
257
32
17
5
9
249
259
l 148
34
18
4
7
249
258
36
19
3
5
246
256
4;8
38
20
2
4
241
251
40
21
2
4
236
245
42
22
2
3
231
240
44
23
1
2
225
234
46
24
1
2
218
227
x
48
25
1
2
212
220
ry'
50
26
�„ 1
1
206
214

Stormwater Pond Design
1/22/98
later Pond Outlet Structure
TER ELEVATION CALCULATIONS
FLOWRATE= *''' 4.8� CFS
-.., .
MANNINGS n =
0.012
DIA. FOR CULVERT PIPE =
12 INCHES
DIA. FOR RISER =
15, INCHES
LENGTH OF CULVERT PIPE _
- 20 FEET
INV. INELEV. OFCULVERT =
11.20 FEET
INV. OUT ELEV. OF CULVERT =
11.00 FEET
INLET COEF. FOR CULV. PIPE FLOW =
0.5
INLET COEF. FOR CULVERT INLET CONTROL =
0.6
RISER WEIR ELEVATION =
12.60 FEET
WEIR FLOW COEF. =
4`
TAILWATER ELEVATION =
11.50 FEET
TAILWATER UNKNOWN = ZERO (0)
NO RISER = ZERO (0) RISER DIA.
" Q10 Routed Flowrate equals 4.8 cfs
Prepared By: SWQ
Checked By:`b 1, `.
HEADWATER ELEVATION ASSUMING INLET CONTROL
HEAD = 1.61
HEADWATER ELEVATION = 13.31
HEADWATER ELEVATION ASSUMING PIPE FLOW
HEAD= 1.18
HEADWATER ELEVATION = 12.68
HEADWATER ELEVATION ASSUMING WEIR FLOW
HEAD = 0.45
HEADWATER ELEVATION = 13.05

Stormwater Pond Design
Drawdown Calculations
1 /22/98
M&M.Storage Buildings -Phase II
Stormwater Pond Drawdown
AREAS (FT^2)
ORIFICE DIA. NUMBER OF ORIFICES
INCHES 1 2 3 4
1'. 0.012
0.025
0.037 0.049
DATAINPUT
NORMAL POOL AREA =
0:209 ACRES
INCHES OF RAINFALL=
f:00 INCHES
BASIN AREA =
2;99ACRES
IMPERVIOUS AREA=
2.60 ACRES
NORMAL POOL ELEVATION =
1 1 .70• FEET
ORIFICE AREA =
i ','.:'0':012
FEET2
STORAGE POOL AREA =
0.2640' ACRES
TIME INCREMENT OF ROUTING =
2':0 HOURS
ORIFICE COEF.
INPUT RESULTS
RUNOFF COEF. (Rv) =
0.8324
ELEVATION OF POOL AT STORAGE =
12.60
FEET
NORMAL POOL AREA =
9,121 .00
FEET2
VOLUME OF RUNOFF FROM RAINFALL =
9,019.64
FEET
VOLUME OF STORAGE=
9,279.45
FEET
Prepared By: SWQ .
Checked By: •.,,

Stormwater Pond Design
Drawdown Calculations
1 /22/98
Prepared By: SWQ .
Checked By:..
Drawdown Calculations
For Pond
Orfice
TIME
ELEVATION
HEAD
FLOWRATE
VOLUME
END ELEV.
FEET
FEET
CFS
CIF
FEET
0
12.60
0.9000
0.05481
394.67
12.56
2.0
12.56
0.8567
0.05348
385.06
12.51
4.0
12.51
0.8145
0.05215
375.45
12.47
6.0
12.47
0.7733
0.05081
365.84
12.43
8.0
12.43
0.7332
0.04948
356.23
12.39
10.0
12.39
0.6942
0.04814
346.61
12.36
12.0
12.36
0.6562
0.04680
336.99
12.32
14.0
12.32
0.6192
0.04547
327.37
12.28
16.0
12.28
0.5833
0.04413
317.74
12.25
18.0
12.25
0.5485
0.04279
308.11
12.21
20.0
12.21
0.5147
0.04145
298.47
12.18
22.0
12.18
0.4820
0.04011
288.82
12.15
24.0
12.15
0.4503
0.03877
279.18
12.12
26.0
12.12
0.4197
0.03743
269.52
12.09
28.0
12.09
0.3902
0.03609
259.86
12.06
30.0
12.06
0.3617
0.03475
250.19
12.03
32.0
12.03
0.3343
0.03341
240.52
12.01
34.0
12.01
0.3079
0.03206
230.84
11.98
36.0
11.98
0.2826
0.03071
221.15
11.96
38.0
11.96
0.2583
0.02937
211.45
11.94
40.0
11.94
0.2352
0.02802
201.74
11.91
42.0
11.91
0.2130
0.02667
192.01
11.89
44.0
11.89
0.1920
0.02532
182.28
11.87
46.0
11.87
0.1720
0.02396
172.53
11.85
48.0
11.85
0.1531
0.02261
162.77
11.84
50.0
11.84
0.1352
0.02125
152.99
11.82
52.0
11.82
0.1185
0.01989
143.19
11.80
54.0
11.80
0.1028
0.01852
133.36
11.79
56.0
11.79
0.0881
0.01715
123.51
11.77
58.0
11.77
0.0746
0.01578
113.63
11.76
60.0
11.76
0.0621
0.01440
103.71
11.75
62.0
11.75
0.0508
0.01302
93.74
11.74
64.0
11.74
0.0405
0.01163
83.72
11.73
66.0
11.73
0.0313
0.01023
73.62
11.72
68.0
11.72
0.0232
0.00881
63.43
11.72
70.0
11.72
0.0163
0.00738
53.10
11.71
72.0
11.71
0.0105
0.00591
42.57
11.71
74.0
11.71
0.0058
0.00440
31.69
11.70
76.0
11.70
0.0023
0.00279
20.08
11.70
78.0
11.70
0.0001
0.00065
#REF!
#REF!
Drawdown'Trme =i3 25 days
Onfrce,Size 1 5 inches,

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. Jay Houston, P.E.
Houston and Associates
PO Box 2927
Shallotte, NC 28459
Subject:
Dear Mr. Houston:
A/ 0
��
x 2
NCLoENR1111011111,,
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
March 16, 1998
ACKNOWLEDGEMENT OF RECEIPT AND
REQUEST FOR ADDITIONAL INFORMATION
Stormwater Project No. SW8 960611 Modification
M & M Storage (formerly MGK Storage)
Brunswick County
The Wilmington Regional Office received a modification to the Stormwater Management Permit for
M & M Storage (formerly MGK Storage) on February 2, 1998. 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 forebay sizing calculations. Weight the percentage of volume associated with each
inlet pipe to size the forebays.
The contours along Lot 9 in Forest Landing Subdivision suggest that some runoff may enter
the project in the future if the owners of Lot 9 decide to regrade their lot. You have no control
over the grading on that lot, even though your grading limits do expand over the property
line. Please provide some type of runoff barrier on the M & M lot, such as a curb, where the
owner will have control.
3. Please relocate the inlet pipe closest to the forebay weir. For this pipe, the forebay might as
well not be there. Relocating the pipe to enter the forebay at a point further up will provide
the needed solids settling.
4. Please add the title of Mark Kennedy to the application.
127 Cardinal Dr. Ext., Wilmington, North Carolina 28405 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/10% post -consumer paper

Mr. Houston
March 16, 1998
Stormwater Project No. SW8 960611 Modification
Please note that this request for additional information is in response to a preliminary review. The
requested information should be received by this Office prior to April 16, 1998, 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].
RSS/arl:
cc:
Sincerely,
Ms. Linda Lewis
Environmental Engineer
S:\WQS\STORMWAT\ADDINFO\960611.MAR
Linda Lewis
Central Files
127. Cardinal Dr. Ext., Wilmington, North Carolina 28405 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/10% post -consumer paper

V. DEED RESTRICTIONS A:N'D PROTECTIVE COVENANT'S
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, Mark Ronnari�r cerrifj that the information. included on this permit
(%tare pnni eleariy 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.
Owner/Authorized Agent
/- Z 7- 98
and Tide Date
VIL AGENT AUTHORIZATION (pleate fin in the wme of dm engineer/surveyor aurltoneed to sunmir plant on die owner's be1w1f.)
Person or firm name Houston and Associates, P.A.
Mailing Address Post Office Box 2927
City Shallotte State NC Zip 28459 Phone [phone]
Please submit application, fee, plans and calculations to the appropriate Regional Office.
cc: Applicant/WiRO//Central Files
r „� Office use only
O E C E[ V E
FEB 0 2 7998 D
PROJ # nil)_

State of North Carolina
Department of Environment
and Natural Resources
Wilmington Regional Office
Division of Land Resources
Land Quality Section
James B. Hunt, Jr., Governor
Wayne McDevitt, Secretary
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
February 5, 1998
NOTICE OF RECEIPT OF EROSION & SEDIMENTATION CONTROL PLAN
Mr. Mark Kennedy
420 Green Hill Road
Leland INC 28451
Dear Mr. Kennedy:
This office has received a soil erosion and sedimentation control plan for the project listed below
which was submitted as required by the North Carolina Sedimentation Pollution Control Act (NCGS 113A-57).
Please be advised that this Act requires that all persons disturbing an area of one or more acres of
land must obtain approval of a soil erosion control plan prior to the commencement of said land disturbing
activity (NCGS 113A-54(d)(4)). The act further states that this plan must be filed a minimum of 30 days
prior to the activity and the approving authority must approve or disapprove the submitted plan within 30
days of receipt. Failure of the approving authority to approve or disapprove the submitted plan within the
30 day period will be deemed approval of the plan. Commencement or continuation of a land -disturbing
activity under the jurisdiction of this Act prior to the approval of an erosion and sediment control plan is a
violation of the Act.
This land disturbing activity described in this plan is also subject to the Environmental Management
Commission's review of their regulations to implement stormwater controls in coastal counties (15 NCAC
2H Section .1000). Contact the Water Quality Supervisor of the Division of Environmental Management to
ensure this activity is in conformance with their rules.
If you have questions, please do not hesitate to contact this office. Your cooperation in this matter
is appreciated and we look forward to working with you on this project.
Sincerely,
Carol N. Miller
Environmental Technician
CNM/dbd
cc: Jay R. Houston, PE; Houston and Associates
WiRO-LOS
PROJECT NAME:
PROJECT NUMBER:
LOCATION:
RIVER BASIN:
SUBMITTED BY:
DATE RECEIVED BY LOS:
M&M Storage Buildings
980202BR
US Hwy 17 - Brunswick County
Cape Fear
Houston and Associates
February 2, 1998
127 North Cardinal Drive, Wilmington, N.C. 28405-3845 • Telephone [phone] • Fax [phone]
An Equal Opportunity Affirmative Action Employer

HOUSTON and ASSOCIATES, P.A.
Consulting Engineers
SHALLOTTE, NORTH CAROLINA 28459
Telephone [phone]
Facsimile [phone]
Ms. Linda Lewis, Environmental Engineer
Division of Environmental Management
North Carolina Department of Environment,
117 Pine Street
Post Office Box 2927
Thursday, January 29, 1998
RIEVE919IEHD FEB p 2 1995
Health, and Natural Resources
127 Cardinal Drive Extension p r
Wilmington, North Carolina 28405 1 O M'/ A TER
Subject: M & M Storage Buildings, Phase II ®®® vvv ���
Brunswick County, North Carolina ((,^
Modification of Stormwater Plan for Approval Q lll�W'
Stormwater Project No. SW8 960611 L
Dear Ms. Lewis:
We are pleased to submit for your review and approval two copies each of
the Stormwater Plans, the hydrologic and hydraulic calculations, and the
executed Permit Application forms.
The first phase of the subject was permitted under the name MGK, Inc.
Storage Buildings and Permit Number SW8 960611. The second phase includes
the addition of seven (7) storage buildings and expansion/modification of the
existing stormwater pond to accommodate the entire project.
The proposed subject project falls within the high density guidelines.
Enclosed is a check in the amount of $385.00 to cover the required
modification/high density application fee.
We appreciate your attention in this matter. Should you have any
comments or require any additional information, please do not hesitate to
contact our office at your convenience.
tuston, P.E.
and Associates, P.A.
JRH/swq
Enclosures
pc: Mr. Mark Kennedy
File; 98-0452-2 (M&M Storage Buildings Phase II, SW/EC)