SW8910314_HISTORICAL FILE_19910429

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW8 �I0�9
DOC TYPE
❑ CURRENT PERMIT
❑ APPROVED PLANS
-� HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
15'4 ICI o�j
YYYYMMDD

State of North Carolina
Department of Environment, Health, and Natural Resources
Wilmington Regional Officc
James G. Martin, Governor [lob Jamieson
William W. Cobey, Jr., Secretary April 29, 1991 Regional Managcr
DIVISION OF ENVIRONMENTAL MANAGEMENT
Mr. Wendell Murray, Superintendent
Pender County Hoard of Education
Post Office Box 1239
Surgaw, North Carolina 28425
Subject: Certification of Compliance
with Stormwater Regulations
Project No. 910314
Topsail Elementary School Addition,
Phase I
Pender County
Dear Mr. Murray:
The Wilmington Regional Office received the Stormwater
submittal for the subject project on March 26, 1991 and final
information on April 26, 1991. The project plans and
specifications as submitted indicated a built -upon area of 3.2
acres_. This equates to 8.7 percent built -upon for the project
site. This being the case, the project complies with the
Stormwater Regulations set forth in Title 15A NCAC 2H.
1003(a)(2). This Certification shall be effective from the date
of issuance until rescinded and the project shall be constructed
in accordance with the plans and specifications as filed with the
Wilmington Regional Office.
Any modification of the plans submitted to this ,Office or
further development of this site will require an Of
Stormwater submittal/modification and approval prior to
initiation of construction. Modifications include but are not
limited to; project name changes, transfer of ownership, redesign
of built -upon surfaces, addition of built -upon surfaces, redesign
or further subdivision of project area.
7225 Wrightsville Avenue, Wilmington, N.C. 2W3-3696 0 Telephone [phone] f-ax 919-256-8572

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Stormwater Certification No. 910314
April 29, 1991
Page 2 of 2
If you have any questions concerning this matter, please
call Paul Rawls or me at [phone].
Sincerely,
..gAo
A. Preston Howard, Jr., P.E.
Regional Supervisor
PER:DSK1:910314.APR
Attachment
cc: Gordon McAdams, P.E., James E. Stewart and Associates
David Smith, Pender County Board of Education
Edward Beck, DEM
Bill Mills, DEM
Wilmington Regional Files
Central Files

DIVISION OF ENVIRONMENTAL MANAGEMENT
Submittal Form for Projects Using Density Limits for Stormwater Control
PROJECT DATA
Name of Project: Topsail Elementary SchoolAddition (Phase 1)
Location (County,�Township/Municipality, Address): -
Penrler Count_, Han)patead _TowrLhip -
Applicant Name: Pender County Board f Education
Mailing Addreso; P.O. Box_1239, Burgaw, !North Carolina 28425
Phone No: [phone]
Submittal Date: March, 1991
Brief Description !include map and appropriate drawings):
Addition to existing Elementary School. Located on campus of=_existi
Topsail High School.
Eater Bedy Receiving Stormwater Runoff: i
Name of Water Body: Unnamed_yributary to Old Topsail Creek
Classification of Water Body: SA
Total Area of Proposed Project (acres):
State/Federal Permits and Approvals Required:
(Check Appropriate Blanks)
36.6 acres
CANA Major Sedimentation and Erosion Control X
000 Permit DEM/DHS Sewage Disposal X
Other (specify):
CALCULATION OF BUILT -UPON AREA
(Suitt -up in area means that portion of an VdividuaI development that is
covered by impervious or partially pervious cover including buildings,
pavement, recreation facilities, etc. but not including decking.)
a) Built -upon area: 3.2 ac.
b) Total project area: 36.6 ac.
built -upon = built -upon -area /.total project area * 100
X built -upon area = 8.7 %
If the water body receiving stormwater runoff is classified as SA, is the
% built -upon area < 25% ?• Yes X No
If the water body receiving stormwater runoff is classified other than SA,
is the Y built -upon area < 30 % ? Yes No
f
STORrIWOTER COLLECT ION SYSTEM .
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IS tnO only kind of stormwater collection system grass swales?
(Grassed - lined s+raIes should have a side slope of 3:1 (H:v) or less.)
+ *,Some piping from building areas.to on -site drainage ditches and swales. 0

If no, please provide a detailed description -
BUFFER AREA
Is the built -upon area at least 30 feet from mean high water of all
surface waters? Yes X No
If no, please provide a detailed description
(Note; Only boat ramps, public roads, public bridges and walkways to water
related facilities are allowed within 30 feet of mean high water if the
project is intended to meet stormwater control requirements through
density limits.)
BEER RESTRICTIONS AND PROTECTIVE COVENANTS
Do the deed restrictions and protective covenants ensure that subdivisions
maintain the development consistent with the plans and specifications
approved by the division.and include the State as a beneficiary of the
restrictions?
Yes _ No N/A
(Include a copy of the restrictions and covenants with this form.)
CERTIFICATION
I, Wendell. Murray _ , certify that the information included on
this submittal form is correct, that the project will be constructed in
conformance with this information and that to the best of my knowledge, the
the best of my knowledge, the proposed project complies with the requirement
of 15 NCAC 2N.1003 (b).
Signature Owner or nt Bata
Pender County Board o Education, P.O. Box 1239
Address Burgaw, North Carolina 28425
If agent, please list owner's name and address below.
DIVISION OF ENVIRONMENTAL_MANAGEMENT S1a-lPF UMAH
Regional Office I p 14
41 C� . t) j
Di to Individual Evaluating Forms / Plans
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CONSULTING ENGINEERS — LAND SURVEYORS — LAND PLANNERS
RECEIVED
Wilmington Regional Offir6
Mr. Paul Rawls
Division of Environmental Management
127 Cardinal Drive Extension
Wilmington, North Carolina 26405
Dear Mr. Rawls:
J�
306-310 NEW BRIDGE STREET
P. O. DRAWER 976
JACKSONVILLE, NORTH CAROLINA 28541-0976
919-455-2414
April 19, 1991
RE: Topsail Middle School and
Elementary School Additions
Phase I
Fender County, North Carolina
During our meeting of April 19, 1991, we discussed phasing the
Topsail project in order to allow you to issue a stormvater approval
on the part of the project which the school system will be putting
out to bid the week of April 22, 1991. Our plans have been revised
to indicate that part of the project contained within Phase I
(Elementary School Additions). The plan revisions also reflect those
changes you requested during our phone conversations on April 17,
1991.
During our phone conversation, you requested the following
information concerning our stormvater plans:
1. Pipe "A" consists simply of a re-routing of an existing
stormvater collector with additional flow generated by new
construction.
2. The catch basins at pipes "F" and "I" have been eliminated
and the pipes now serve only as conventional culvert
crossings beneath paved drives.
3. Pipe "G" has been relocated to decrease the overall length
of pipe.
4. A copy of a maintenance agreement from the Pender County
Board of Education is attached.
5. The roof drainage piping at the courtyard area is necessary
because of drainage problems created by the proximity and
layout of existing construction.
ENVIRONMENTAL ENGINEERING • STORM WATER MANAGEMENT • WATER AND WASTEWATER SYSTEMS
SOILS USE STUDIES • FEASIBILITY REPORTS • IMPACT STATEMENTS 0 CONSTRUCTION PLANS
FA

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Mr. Rawls
Page Z
April 19, 1991
We are enclosing one set of revised plans for your use. We are
also enclosing a set of the revised Pender Elementary School plans.
We will submit Phase II of the project for your approval when
the sewer situation is resolved. We appreciate your cooperation in
this matter, and please call if you have additional questions.
GRM/mh
Enclosures
xc: Mr. Ken Gallaugher
CF (P)
Very truly yours,
JA?IES E. STEWART AND ASSOCIATES, INC.
Gordon R. McAdams, P. E.
Project Manager
f�
Y
RECEIVED
APR 2 101
Wilmingwii IieRieHal ONO
qEM
CONSULTING ENGINEERS —LAND SURVEYORS —LAND PLANNERS

f I.

-iEL:1-919-455-3441 Apr 17.91
MAINTENANCE A13REEMENT
Pon
STORMMATER COLLECTION SYSTEMS
FOR
TOPSAIL MIDDLE SCHOOL AND
ELEMENTARY SCHOOL ADDITIONS
PENDER COUNTY, KORTH CAROL.INA
13:28 No.004 P.02
The Pander County Board of Education,agrees to the following
requirements of the Borth Caroline Division of Environmental
Management concerning the stormvatur collection system proposed for
the Topsail Middle School, and Elementary school Additionsi
All drainage xaya, including ■waloo, ditchoo, rip rep
scour pwda, asphalt flumen, and outlets at roof drains
on the nits will be maintained to prevent eroaion for
to life of the project.
Mendell Murray,
Ponder County Board
Date
RECEIVED
L irtirig4ori F1eg111"', office
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3

CONSULTING ENGINEERS -. LAND SURVEYORS - LAND PLANNERS
FACSIMILE TRANSIT I SS I ON COVER SHEET
Jg�4
306.310 NEW BRIDGE STREET
P. O. DRAWER 976
JACKSONVILLE, NORTH CAROLINA 28541.0976
919-455-2414
FAX #: [phone]
TO:
Cmfp ANY
FAX # : �/ 5Y6 - goo-/
DATE:
- - APO 2 1g1
FROM: _TCJ i� rZo �" �177)
J F.SA JOB NO.:
REKkRKS :
Nlj�UIFR OF PAGES ( INCLUDING TRIS SHEETS:
C. 6.aY
0RIOt tit TO FOLLOW BY PIA I L : YES �� NO
CONFIRMATION OF RECEIPT REQUESTED: YES NO L�
ENWRONMEMAL ENGINEERING • STORM WATER MANAGEMENT Y WATER AND WASTEWATER SYSTEMS
S, .S USE STUDIES • FEASIBILITY REPORTS 0 IMPACT STATEMENTS 0 CONSTRUCTION PLANS ~

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NARRATIVE'REPORT
FOR
EROSION AND SEDIMENTATION CONTROL MEASURES
TO SERVE
TOPSAIL MIDDLE SCHOOL
I
AND
TOPSAIL ELFAIENTARY'SCHOOL ADDITION
1
HAMPSTEAD TOWNSHIP, PENDER OOUNTY, NORTH.CAROLINA
OWNER
Pender County Board of Education
Burgaw, North Carolina
March,,199I_
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MAR 2 6 9 1 i
CAROL�N�.•°
0 �.....to OEM
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FOR REVIEU"OLY
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PROJECT I N1+'OMIAT I ON SHEET
fender County Board of Education
P.O. Box 1239
Burgaw, North Carolina 28425
Contact Person: David Smith
919-259-2187
Engineer:
Tames F. Stewart and Associates, Inc.
P.O. Drawer 976
Jacksonville, North Carolina 28540
Contact Person: Gordon It. McAdams, N.E.
919-455-2414
1
1
1
1
1
1
1

NARRATIVE REPORT
' FOR
EROSION AND SEDIMENTATION CONTROL MEASURES
TO SERVE
TOPSAIL MIDDLE SCHOOL
AND -
TOPSAIL ELEII'IENTARY SCHOOL ADDITION
MNIPSTEAD TOWNSHIP, PENDER COUNTY, NORTH CAROLINA
1
PURPOSE:
The purpose of this report is to provide specifications
for the measures and methods to be used to control acceler-
ated erosion and sedimentation resulting from the land
disturbing activities of more than one contiguous acre
in size. This report is prepared in accordance with
' the requirements of the Sedimentation Pollution Control
:act of 1973.
�i
2. SCOPE OF REPORT:
This report will include a general description of existing
property conditions, proposed uses of the property, proposed
chancres to the property to accomplish the proposed uses and
the proposed measures to be taken in the control of accelerated
erosion and sedimentation duriing construction activities. The
' use of this report will require a review and familiarization
with the attached plans and appendices as they will clarify
and supplement the narrativefi{nformation.
I I
3. PROJECT DESCRIPTION:
' Topsail Middle School consistsofa proposed building of
approximately 62,150 square feet with adjacent drives,
par]cIhg areas, sports and play"ing fields and adjacent
cleared areas. Topsail Elementary School addition
' consists of a 48,867 square feet addition to an existing
14,120 square feet sccool buillding.
4. EXISTING CONDITIONS:
1
This project is located at the'existing Topsail High ,School
and Elementary School site on the West side of Highway 17 at
' Topsail in Pender County (see.enclosed vicinity map). The
total project area is approximately 36 acres, inluding the
recent addition of the Futch tract Southwest of and adjacent
to the existing elementary school.

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NR-2
The soils on the site are dominated by deep sands which range
fropi very poorly drained to excessively well drained (Kureb,
Mandarin, Leon and Murvilla Soil Series). The landscape
geomorphology is eolian in character with shallow interdunal
troughs seperated by terrace like escarpments. Average land
' slopes are less than 2% with small terrace escarpments that
may have as much as 8% slope. Soil conditions have a high
erosion potential except where cut grades'expose spodic
' horizons and similar hard pans. The wettest soils on the
site qualify as CIVA Section 404 wetlands which has been
delineated and approved by the Army Corps of Engineers. All
' of the wetlands on the tract qualify as either isolated or
headwaters and Nationwide permits will be obtained prior to
disturbing any wetland soil areas. Most of the site has
historically been disturbed except for the wooded portion
' where the middle school is being sited and the Futch tract.
Historically disturbed areas are typically either built upon
or grassed.
' 5. PROPOSED CONDITIONS -
The project includes the construction of a new middle school,
' enlargement of the existing elementary school, and construc-
tion of support structures and facilities. Support facilities
include drives, parking, potable water extensions, on -site
' sewage treatment and disposal, and storm drainage structures
to tie into existing systems. Significant reconstruction of
existing facilities are required in some locations adjacent to
tthe existing high school to minimize conflicts.
Approximately 32 acres of the site will be disturbed for this
project. A total of approximately 17% of the site will qualify
' as built upon at project completion. The low density option of
less than 25% built upon area will be used for storm water
snanagenient. The copy of the submittal form and support data
is enclosed.
6. EROSION AND SEDIMENTATION CONTROL. MEASURES, STRUCTURES, AND
' MAINTENANCE:
A. Construction Sequence:
Sequencing a timely execution of construction activities
is considered the most important erosion and sedimentation
control measure that can be exercised. The control of
the source of sedimentation is the most efficient and
t cost effective approach to providing for control of off -
site accelerated sedimentation resulting from construction
activities, The following construction sequence is for
' the purpose of defining the relative timeliness of instal-
lation of sediment control devices, and emphasizes the
timely stabilization of the affected watershed.
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NR--3
CONSTRUCTION OPERATION SEQUENCE
1.:
Obtain approval for extent and geometry of wetlands
impacted by nationwide permits from the Army Corps
of Engineers.
'
2.
Obtain storm water management approval from the
Division of Environmental Management.
'
3.
Obtain erosion control plan approval from the Land
Quality Section prior to initiating any land dis-
turbing activities.
'
4.
Notify hand Quality Section representative of all
relevant precontruction conferences at least one
week prior to those meetings.
5.
Install sediment traps on existing outfall ditches
and at storm drain inlets that will be impacted
'
by initial demolition and cleaning work.
6.
Clear and grub the middle school site. Demolish and
'
remove existing pavement and other impacted facilities
at the existing bus parking lot -West of the existing
high school. Maintain sediment control facilities and
install additional measures or diversions to control all
'
disturbed soil areas.
7.
Install stabilized construction entrance where construc-
tion vehicles access area and rough site.
paved grade
8.
Install storm drainage facilities and additional sedi-
ment control measures for those facilities. Establish
finish grade and provide permanent vegetative cover on
all swales and channels within 30 working days.
'
9.
Install subsurface utilities and services. Maintain
positive drainage and sediment control for those -out-
lets for all work areas.'
10.
Construct buildings and improvements. Maintain all
sediment control facilities to effectively control
off site sedimentation.
11.
Provide a stabilized ground cover on all denuded soil
areas within 30 working days of completing any phase
of grading and the lessor of 30 working days or 120
calendar days of completing construction. This will
include aggregate stabilization of those portions of
roads and parking lots that are not seeded and mulched.

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14R-4
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12. Upon watershed stabilization, clean out remaining sedi-
ment traps and place rip rap stabilization at pipe out-
lets and ditch turns.
13. Remove remaining temporary sediment control measures
within 90 days of stabilizing contributing watersheds.
'
CONSTRUCTION 11UR ION
A construction duration of approximately 360 days is
expected. Project construction is proposed to begin
'
about May of 1991.
1. 6rade for construction access - 1 day.
'
2. Rough grade drives, parking areas and building founda-
tion and completion of borrow and spoil areas - 4 weeks.
3. Construct ditches and swales - 2 weeks.
4. Grade playing fields - 2 weeks.
'
5. Install - 3
iinderground services and utilities weeks.
'
6. Place sidewalks and stabilized base course on streets
- 4 weeks.
7. Place finish drive and parking lot surfaces - 2 weeks.
'
The above construction durations are approximations only
and do not take into account the variable weather condi-
tions or similar complications. One should also under-
stand that each of the operations may not begin immediately
upon completion of the preceeding operation or may be
occuring simultaneously at various locations on the pro-
'
ject site. Each and all of the construction activities
noted in the constriction duration will occur in a manner
relative to the context described in the construction
'
sequence.
B. Stabilized Construction_ Entrance:
'
This facility shall be constructed as indicated in the
attached appendices. It shall be placed at all locations
of construction access to the project from public rights -
'
of -ways or adjacent properties. if the gravel pad is found
to be ineffective, other measures such as enlarging the
entrance or washing all construction vehicle tires shall
be done to prevent sediment tracking onto public rights -
'
of -way or other paved areas serviced by storm drain systems.

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As permanent stabilization is established and progresses to
'
the interior of the project, the construction entrance or
similar means shall be progressively located to remain at
the interface of the construction activities in progress
and the project areas that are stabilized. This detail
'
may also be used to stabilize contractor staging areas
inside the project boundaries. '
'
C. Silt Fences:
Fabric silt fences shall be constructed as per the detail
'
in the appendices. These devices may be used at storm
drain inlets not subject to concentrated storm runoff and
any other areas designated that typically does not receive
diffused surface water flow in quantities greater than one
'
(1) cubic foot per second per ten (10) foot sections of the
proposed silt fence. Silt fences shall be inspected after
'
every rain and at intervals not exceeding one (1) week.
.accumulated sediment shall be removed and placed in approved
spoils areas. Any deterioration of this device shall
require iirunediate repair to a state of 100% functional
'
stability.
D. Finish Grades:
'
All cut and fill grading shall be maintained to provide
positive surface drainage throughout the construction pro-
cess in the areas of the construction activities. All
outlets constructed for this purpose shall be provided
with sediment control devices. All cut and fill areas
shall be shaped to final grade in one continuous operation.
'
Cut and fill slopes which shall be stabilized with vegeta-
tion requiring mowing maintenance, shall be no steeper than
3:1 (horizontal:vertical). No cut or fill slopes in or
immmediately parallel to rights -of -ways or easements shall
'
exceed 2:1. The side slopes of excavated trenches in
cohesionless soil materials shall not exceed 2:1. All
cut or fill slopes subject to concentrated stormwater
'
run --on shall be provided with diversions or slope drains
to protect the slope face.
' Temporary diversions shall be designed and placed for the
conveyance of sediment and stormwater run-off only. To
minimize the chance of overtopping, no sediment storage
' will be utilized in the design of the initial installation.
If and when progressive gully erosion becomes evident in
the diversions, rock check dams or similar measures shall
be installed to restrain this process. Temporary diversions
shall typically be constructed with a broad fire lane plow
or similar broad channeling equipment. Spoils shall be
located on the downslope side and immediately adjacent to

T�fl-6
'
the channel with a maximum surface area sloping to the
Channel. Temporary diversions may be installed for the
'
purpose of intercepting stormwater run-on prior to entering
areas of construction activity, or to protect sensitive
finished grades, or to shorten slopes and decrease water-
shed areas contributing to individual sedimentation control
devices.
All temporary diversions shell be provided with outlets that
dissipate erosive velocities and/or provided with sediment
storage entrapment prior to stormwater release. In areas
where temporary diversions are used to protect finisher/
'
slopes, the diversions shall become permanent features for
the graded landscape unless otherwise shown or specified.
'
F. Permanent Velocity Control Devices:
All storm drain outlets shall be provided with velocity
transition facilities to minimize outlet scour. Outlet
velocities were determined in the manner stated in appen-
dices. Where outlet velocities exceed the control velocity
required by sedimentation control laws, rip rap facilities
or other structures are used to decrease the average velo-
'
city to no more than the acceptable level. 'The average
velocities for permanent swales or channels shown on the
plans are designed to be less than the control velocity of
'
the soil materials expected in the invert of those channels,
or are provided with an erosion resistant liner. Fortified
rock check dams or treated wood check dams may he installed
'
as permanent facilities to reduce or swale energy gradients.
F. Temporary Velocity Control Devices:
'
Typical temporary velocity control devices shall include
but are not limited to rock check dams, temporary diver-
sions, debris barriers, and staked straw bales. Rock
check dams shall be constructed as per the details in
the appendices. Standard rock check dams shall be used
in permanent channels where the expected design velocities
are less than 3.5 fps. Larger stone used in the fortified
rock check dams are sized for the design velocities based
on the charts in appendices. Rock check dams shall be used
in all temporary and permanent channels where the channel
degradation for bare soil conditions is expected or becomes
self --evident during the site development. Use of staked
straw bales shall include only situations where a filtering
function is not required. Typical uses may include place-
ment in sediment basin interiors to increase travel path
tortuosity and sediment trapping efficiency, or temporary
diversions in locations initially inaccessible for construe-
tion equipment.
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NR-7
G. Protective Cover and Watershed Stabilization:
'
Areas to be protected by vegetative cover shall include
but'are not limited to any area denuded of a vegetative
cover (wring the construction and not otherwise stabilized
during the development process. Any undirected disturbed
'
areas shall be stabilized at the expense of the contractor.
In cases using grass for permanent stabilization, the con-
tractor shall guarantee a stand. The work to be done to
acquire the necessary vegetative cover shall inelt.tde but
is not limited to appropriate tilling of the areas, the
application of fertilizer and lime, sowing of seed, and
'
placing of appropriate mulch to hold the seed and soil in
place until germination and growth occur and other plantings
as shown or specified.
'
Areas to be seeded for grass stabilization shall be given
,an initial application of agricultural lime at a rate of
'
at least 4,000 pounds per acre, superphosphate at 500
pounds per acre, and 12-4-8 grade fertilizer (or equivalent)
at a rate of 600 pounds per acre, all of which shall be
thoroughly mixed with the soil. After the area to be seeded
'
is brought to proper finish grade, the entire area shall he
tilled on the contour to a minimum depth of 4-inches by
discing, harrowing, or other approved means. Following
tillage, all large debris and stones shall be removed and
'
the surface leveled into a smooth aspect. Severely com-
pacted areas and cut grade areas shall be ripped at greater
'
than 6-inches of depth with a spring toothed ripper or sitai-
lar equipment after finish grade but before tillage.
Upon completion of ground and soil preparation work, a
grass seed mixture of 100 pounds per acre of "Rebel"
fescue, 25 pounds per acre of common bermuda grass and
10 pounds per acre of centipede grass shall be sown.
Bermuda grass seed shall be in an unhulled condition
from September 1 to April 1 and be in a hulled condition
at all other times. Substitutions for "Rebel" fescue
will be considered acceptable only if the substituted
fescite variety has no ratings less than "5" as deter-
mined by the U.S.D.A., 1983 Tall Fescue Trials or more
recent U.S.D.A. trial data. This shall be followed by
placing a suitable cover of clean straw or approved equi-
valent mulch at a rate of 1 112 to 2 tons per seeded acre.
If straw is used as a temporary cover only, these rates
shall be doubled or tripled depending upon average slope
conditions. The contractor shall guarantee a full stand
of grass over the entire area. in the case of sloping
areas or other areas of more concentrated storm water
B
run-off, the straw shall be stabilized by the application
of an asphalt emulsion or other approved binding materials.
Alternative methods such as hydro -seeding or hydro -mulching
will be considered on an individual basis.
1

NR-8
' a stand of grass shall be considered acceptable when areal
cover is at least 95%. The contractor shall overseed, and
otherwise maintain the grassed areas until the stand of
grass has reached a uniform height of 3 to 4-inches and
' a state of uniform species maturity. The contractor shall
then top -caress the stand of grass with a minimum of 200-300
pounds per acre of 16-4-8 fertilizer (or equivalent).
' AnnuaI weed grasses and grain weeds shall not he con-
sidered part of the areal cover, and seedling stands
shall not be considered acceptable until the stand
' reaches a state of uniform post -seedling maturity for
that species.
If straw mulching results in competing stands of grain,
' maintenance shall include mowing of the grain weed stand
to a height of 4-inches prior to reaching a height of
10--inches. Grain weed stands shall not be considered
part of the minimum 95% areal cover. Unacceptable grass
stands shall be overseeded, after aeration by Spiker, at
112 the original rate.
Ii. Maintenance:
All erosion and sedimentation control devices and measures
shell remain in
place and be maintained
to full functional
capacity by the
contractor until all of
the contributing
watershed is stabilized
to the point of
no longer contri-
buting accelerated
sedimentation. All
devices shall he
inspected on at
least a weekly basis, and
maintained at
100% functional
design capacity. All sediment
basins and
other sediment
storage structures shall
be maintained to
1
at least 50% of
their sediment storage
capacity until
removed.
1
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APPENDIX I
ENGINEERING ASSUMPTIONS ANT) CALCULATIONS

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1
EING I N1'EK I NG ASSUMPTIONS AM) CALCULATIONS
A. Pine Outlet Protection:
Outlet protection was estimated based on the average velocity
of stormwater discharges exiting the pipe or other facilities
compared to the maximum velocity allowed on the receiving soil
conditions as specified in the Sedimentation Control Act of
1973. The estimated stormwater exit velocities and control
velocities are given in the drainage data chart on the plans.
Control velocities as shown in Table A were approximated using
the UNIFIED soil classification system to evaluate existing
on -site soil conditions and the use of Table B. nutlet veloci-
ties were determined using Manning's Formula. For locations
where the hydraulic design of the structure exceeded the 10 year
return storm discharge, less than flowing full conditions were
evaluated based on.the attached tables. Table D was used to
estimate the mean diameter of stone used as a velocity control
measure.
MANNING'S FORMULA
0=( 1.486 )(A)(R * 213)(S * 1/2)
n
V=Q/A
Other arrangements of the basic formula were used when deemed
appropriate for the specific situations.
* Denotes foLlowing number is an exponent.
13. Stormwater Run-off :
The design peal: run --oft' rates are shown on the drainage data
chart on the plans. The erosion and sediment control measures
and devices are sized based on a ten (10) year return interval
storm.
C. Sediment Trap and Storage Sizing:
Max imim storage volume estimates are based on 112 acre inch
of sediment storage per year per acre of disturbed watershed.
Where reasonably practical, off -site stormwater run-on fro►n
undisturbed watersheds was diverted around sediment storage
facilities. Small sediment pit facilities are designed for a
50% functional life of 6 weeks. These facilities shall be
placed to serve no more than one (1) acre of disturbed water -
stied and a maximum life duration of 6 weeks. Where the contri-
buting disturbed watershed is greater than one (1) acre and the
design life for construction activities exceeding 6 weeks can be
1

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expected, sediment storage facilities are sized based on a 50%
' functional life for the actual construction duration expected and
stated on the plans. All large facilities serving a functional
life of 6 to 12 months were sized based on the Universal Soil
Loss Equation with factors taken from SCS-Technical Guide, Sec-
tion 11-1 (October 1976). These factors and calculations are
ShOWn on the plans for these individual facilities. Where reser-
voirs are proposed for use iu sediment storage in large water-
' sheds, sediment discharge rate and sediment yield formulas are
used to size the facilities and is stated with the drainage data.
1

TABLE A
MAXIMUM PERMISSIBLE
MATERIAL
_ VELOCITIES FOR
F.P.S.
M.P.S.
FINE SAND (NONCOLLOIDAL)
2.5
•B
SANDY LOAM (NONCOLLOIDAL)
2.5
•B
SILT LOAM (NONCOLLOIDAL)
3.0
•8
ORDINARY FIRM LOAM
3.5
1.1
FINE GRAVEL
5.0
1.5
STIFF CLAY (VERY COLLOIDAL)
5.0
1.5
GRADED. LOAM TO COBBLES (NONCOLLOIDAL)
5.0
1.5
GRADED.SILT TO COBBLES (COLLOIDAL)
5.5
1.7
ALLUVIAL SILTS (NONCOLLOIDAL)
3.5
1.1
ALLUVIAL SILTS (COLLOIDAL)
5.0
1.5
COARSE GRAVEL (NONCOLLOIDAL)
8.0
1.8
COBBLES AND SHINGLES
5.5
1.7
SHALES AND HARD PANS
6.0
1.8
SOURCE: ADAPTED FROM RECOMMENDATIONS BY SPECIAL COMMITTEE ON
IRRIGATION RESEARCH, AMERICAN SOCIETY OF CIVIL ENGINEERS. 1928,
FOR CHANNELS WITH STRAIGHT ALINEMENT.. FOR SINUOUS CHANNELS
MULTIPLY ALLOWABLE VELOCITY BY 0.95 FOR SLIGHTLY
SINUOUS. BY 0.9
FOR MODERATELY SINUOUS CHANNELS. AND BY 0.8 FOR HIGHLY SINUOUS
CHANNELS.
TABLE B
DITCH LINING MANNING'S N y��FPS
tn
GW
0.022-0.024
6-7
0O
Q yr
GP
0.023-0.026
7-8
J }
W J
D
0.023-0.025
3-5
GM
w
4 >
4
U
0.022-0.020
2-4
O
GC
0.024-0.028
5-7
0
SW
0.020-0.024
1-2
0
tn
SP
0.022-0.024
1-2
D
0.020-0.023
2-3
0
O
w
u
SM
U
0.021-0.023
2-3
SC
0.023-0.025
3-4
O
CL
0.022-0.024
2-3
ML
0.023-0.024
3-4
w
i
V
Z
_j
OL
0.022-0.024
2-3
O
O
CH
0.022-0.023
2-3
MH
0.023-0.024
3-5
J
n
Z
LL.
v}
a
OH
0.022-0.024
2-3
HIGHLY
PT
0.022-0.025
2-3
ORGANIC
OW.HDS7` FHA 1973

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TA1lI,F. F
-XIMUM ALLOWABLE DESIGN VELOCITIES''
' FOR VEGETATED CHANNELS
TYPiC'AL SOIL GRASS LINING PERMISSIBLE VELOCITV
CR-%NNt;L SLOPE CHARACTERISTICS2. FOR ESTABLISHED GRAS
.APPIAC.ATION LINING (FTISFC)
0 -- 5 a EASILY ERODIBLE BERMUDAGRASS 5.0
NON -PLASTIC TALL FESCUE 4.5
' (SANDS & SILTS) BAHIAGRASS 4,.5
KENTUCKY BLUEGRASS 4.5
GRASS -LEGUME MIXTURE 3.5
' H ROS i ON RESISTANT BERMUDAGRASS 6.0
PLASTIC TALL FESCUE 5.5
' (CLAY MIXES) BAHIAGRASS 5.5
KENTUCKY BLUEGRASS 5.5
GRASS -LEGUME MIXTURE 4.5
5-10% EASILY ERODIBLE BERMUDAGRASS 4.5
NON -PLASTIC TALL FESCUE 4.0
(SAND & SILTS). BAHIAGRASS 4.0
KENTUCKY BLUEGRASS 4.0
GRASS -LEGUME MIXTURE 3.0
�I EROSION RESISTANT BERMUDAGRASS 5.5
PLASTIC TALL FESCUE 5.0
(CLAY MIXES) BAIIIACGRASS 5.0
KENTUCKY BLUEGRASS 5.0
GRASS -LEGUME MIXTURE 3.5
10% EASILY ERODIBLE BERMUDAGRASS 3.5
NON -PLASTIC TALL FESCUE 2.5
(SANDS & SILTS) BAHIAGRASS 2.5
KENTUCKY BLUEGRASS 2.5
EROSION RESISTANT BERMUDAGRASS 4.5
PLASTIC TALL FESCUE 3.5
(CLAY MIXES) BAHIAGRASS 3.5
KENTUCKY BLUEGRASS 3.5
SOURCE: USDA-SCS MODIFIED
NOTE: 1. PFRAI I SS I BLE VELOCITY BASED ON 10-YR STORM PEAK RUNOFF
2. SOIL ERODIBILITY BASED ON RESISTANCE TO SOIL MOVFAIENT
FRUI CONCENTRATED FLOWING WATER.
3. BEFORE GKASS•IS ESTABLISHED. PERMISSIBLE VELOCITY IS
' DETEK:UINED BY THE TYPE OF TEMPORARY LINER USED.
REF: N.C. EROSION AND SEDIMENT CONTROL PLANNING AND DESIGN
1UkNUAL, DNRCD 1988.
1

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TABLE F
PEMIISSIBLE SHEAR STRESSES
PERMISSIBLE UNIT SHEAR STRESS, Td
LINING CATEGORY LINING TYPE (LB/FT.2)
TEMPOK-\RY WOVEN PAPER NET
0.15
JUTE NET
0.45
FIBERGLASS ROVING:
SINGLR
0.60
DOUBLE
0.85
STRAW WITH NET
1.45
CURLED WOOD MAT
1.55
SYNTHETIC MAT
2.00
STONE SIZE (INCHES)
G11ZNVEL RIPRAP 1
0.40
2
0.80
ROCK RIPRAP 6
2.50
(Td=(5)(d 50' )) 9
3.80
12
5.00
15
6.30
18
7.50
21
8.80
24
10.00
TABLE G
MANNINGS "n" FOR TEMPORARY LINERS
n VALUE FOR DEPTH RANGES
0-0.5 FT 0.5-2.0 1~T >2.0 FT
LINING TYPE
WOVEN PAPER NET
0.016
0.015
0.015
JUTE NET
0.028
0.022
0.019
FIBERGLASS ROVING
0.028
0.021
0.019
STRAW WITH NET
0.065
0.033
0.025
CURLED WOOD MAT
0.066
0.035
0.028
SYNTHETIC MAT
0.036
0.025
0.021

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APPENDIX II
VICINITY MAP

HAMPSTEAD
17
VICINITY SKETCH
N.GS.it. S I T E
1592
TO ---�
JACKSONVILLE
N.C.Sjt
ilea TOPSAIL
k
(NO SCALE)
3
PROJECT
TOPSAIL MIDDLE SCHOOL AND
TOPSAIL ELEMENTARY SCHOOL ADDITION
PENDER COUNTY, NC

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3' OF LEVEL GRADE
OVERFLOW PER ACRE
OF WATERSHED
SYNTHETIC SILT
CONTROL FABRIC
(SOIL FILLS
ONLY) /
i'
J
TOP OF CHANNEL
FLOW
I)N0TYA WIDTH 4'
2? AT LEAST ONE TRAP TO BE
LOCATED AT ENTRANCE TO
EACH ENCLOSED STORM
DRAIN CONDUIT
lU CHANNEL SEDIMENT TRAP
TOP OF SPOIL BERM
11F TRAP CONSTRUCTED
OF SOIL FILL?
22' DIA_ MIN. .�
—12of
MIN.
VOLUME
PER -
1 � PLPN
2
F.* L
r
DIVERSIONS TO ENTER
AT UPPER END
DIVERSION COLLECTI N S D M NT TRAP
NOTE: DIMENSIONS OR QUANTITY OF SEDIMENT TRAPS SHALL BE
ADJUSTED AS NEEDED TO YIELD A TOTAL SEDIMENT STORAGE
OF AT LEAST 22.4 CUBIC YARDS PER ACRE OF CONTRIBUTING
TEMPORARY SEDIME
SECTION DETAIL
0
T TRAP
J

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July 1979
1
.
STABILIZED CONSTRUCTION ENTRANCE
'
(not to scale)
Public Right-
50' min. of -way
' �
4 MIN.
£risting ground Provide appropriate transition
PROFILE between Stabilized ConstrJc-
.___.� Lion Entrance and Public Right -
of -Way
50' min. `
Public
"_
Right -of -
ground g I Way
A•lY,i f_ rR
LAN
Construction Specifications
1. Stone size - Use HSHA size No. 2 (2-1/2" to 1"). or AASH '0 designation
H43, size No. 2 (2-1/2" to 1-1/2"). -Use crushed stone.
2. Length - As effective, but not less than 50 feet.
'
3. Thickness - Not less than FOUR (4) inches.
4. Width - Not less than full width of all points of ingress or egress.
5. Washing - Vnen necessary, wheels shall be cleaned to remove sediment
prior to entrance onto public right-of-way. When washing is required,
it shall be done on an area stabilized with crushed stone which drains
into an approved sediment trap or sediment basin. All sediment shall
'
be prevented from entering any storm drain, ,ditch, .or watercourse
through use of sand bags, gravel, boards or other approved methods.
6. :laintenance - The entrance shall be maintained in a condition which will
prevent tracking or flooring of sediment onto public rights -of -way.
This may require periodic top dressing with additional stone as con-
ditions demand and repair and/or cleanout of any measures used to trap
sediment. A11 sediment spilled, dropped, washed or tracked onto public
rights -of -way must be removed immediately.,.
0

9
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I
TEMPORARY DIVERSIONS
11
CO:?SL.:'L]Ct to intercept storm water run-on.
uy1
-Area of grading activity _
'.i,yi�o�,M#i��Y��.}.r'rr,'�,�:,ti.":�ry��•'-.w;,;y�t!".;.�3i• s' ' `,�►,y�1.•k r /rir'..
Channel to divert
storm water run --on.
Cor.s:ruct_across graded areas to shorten slope or
decrease watershed area for sediment control
Iles. C:
fir'. 1.,. �':; .�.•�.^- ..rt',',`. a { 1�...
Elie ',i •.lr". �i�i'-'�•, t�%y yn•,ti i:'�+�.V•.!}!'•'li�' .
1 Construct to protect sensitive finish grades.
C u t or
f i 11
1Ope
'
_er..;,orary diversions shall typically be constructed with a
broad fire lane plow or similar broad channeling Qquipment.
Spoils shall always be located downslope and immediately ad-
jacent to the channel and with maxim0m surface area sloping
to the channel. Diversions shall be placed for the convey-
�nce of sediment and storm water run off only. To assume min-
im_-! chance of overtopping, no sediment storage -will be
utili-,ed in the initial installation. If and when progress -
I've gully erosion becomes evident in the diversions, rock
check dams will be installed to restrain this process. All
'
-_e^nporary diversions shall be provided with outlets that dis-
s_pate erosive velocities and/or provide sediment storage,
entrapment prior to storm water release.

S
h

u
RIP RAP
5D
M CHANNEL
CHANNEL
PLAN VIEWS
SECTION VIEWS
RIP RAP SCOUR PAD
NOT TO SCALE
MEDIAN STONE DIA.n 6"
I) D-!NSIDE DIAMETER OR WIDTH OF CULVERT
2)MINIMUM STONE THICKNESS TO BE 2 TIMES SPECIFIED
MEDIAN STONE DIA.
r, F%
NO CHANNEL
�& ffktvazl mid ,-d4"ialea, egne.
CONSULTING ENGINEERSAND LAND SURVEYORS
P.O. DRAWER 07B
JACXSOWILLE, NORTH CAROLINA 2C541-007E Sig
919-455-2414
3D

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1
1
1
1
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1
SLOPE
SLOPE LENGTH (FT.)
<2%
100
2 TO 5%
75
5 TO 10%
50
10 TO 20%
25
>20::
15
REF: EROSION AND SEDIMENT CONTROL PLANNING
AND DESIGN MANUAL, D.N.R.C.D. 1988.
NOTE.
E-JRLAP SHALL NOT
5E USED
srN
S c4�oTT/cF
T T 1 T q
R�cT RAF R DgRMF
S q0�� S,c T�Nc
WOODEN POST
DIRECTION OF WELDED
RUN OFF FLOW WIRE MESH--
BACKFILL
EROSION &SILTATION
CONTROL FABRIC ---�
i2m,
MIN. 2" X2"X48" WOODEN POSTS
OR OTHER APPROVED MATERIAL,
WELDED
WIRE MESH
W L
24" TYP.
GROUND LINE
24" MIN.
EXTRA DEPTH REQUIRED
FOR NON -STABLE SOILS
.SECTION VIEW
TYPICAL INSTALLATION
OF SILT FENCE
NO SCALE
kme4
CONSULTING ENGINEERSAND LAND SURVEYORS —
�,c,�oric��l� , ✓fo�ll �tofi;ra
Ili

a
' Its •1• •1 iIc , ' II .. , f ,i ,
a A
e�

1 w
Gs
t GRADE BREAfC ,
SPOIL
1 / BERM
/ -
16" /
\ MIN. /
' BOTTOM OF
EXCAVATION
FABRIC COVERED LEVEL GRADE
FABRIC COVERED GOURD (SEE PLANS FOR LENGTH)
X7467 STONE
PLAN VIEW
TOP OF BANK
c O\V. 6E�M ' �- CNANNEt
OP
[ OF ��
FLOW 11 17�
SYNTHUIC SILT i ' INVERT
CONTROL FABRIC 12"
MIN.
2i�
f �
�—
VOLUME
' ---- PER
1L PLAN SECTION VIEW
2
' 467 WASHED LEVEL GRADE 16' MIN.
STONE BOURD
' NOTE:
CONDITION SHOWN IS FOR CHANNEL TERMINATING
AT GRADE BREAK TO STEEPER SLOPES
1 SEDIMENT TRAP WITH
LEVEL SPEADER OUTLET
' CA
NOT TO SCALE
JAMES E. STEWART & ASSOCIATES. INC.
consulting engineers - land surveyors
LACKSONVILLE, NORTH CAROLINA (919)-455-2414�
1

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.-
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'
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APPENDIX IV -
FINANCIAL RESPONSIBILITY FORM

1 ,
FINANCIAL RESPONSIBILITY/OWNERSHIP FORM
SEDIMENTATION POLLUTION CONTROL ACT
No person may initiate any land -disturbing activity on one or more Contiguous acres as covered by the Act
before this form and an acceptable erosion and sedimentation control plan have been completed and approved
by the Land Quality Section, N.C. Department of Environment, Health, and Natural Resources. (Please type or
print and, if question is not applicable, place N/A in the blank.) .
r Part A.
1. Project Name Topsail Puddle School and Topsail ElementarySchoolAddition
2. Location of land -disturbing activity: County tender , City
or Township Hampstead - - , and Highway! Street U.S. Hwy. 17
3. Approximate date land disturbing activity will be commenced: May 1991
4. Purpose of development (residential, commercial, industrial, etc.) ; New School and School Addition
5. Total acreage disturbed or uncovered (including off -site borrow and waste areas 32+
9 ( 9 ) —
6. Amount of fee enciosed $ 650.00
7. Has an erosion and sedimentation control plan been tiled ? Yes R No
S. Person to contact should sediment control issues arise during land -disturbing activity.
Name i.irtle_and Associates Architect Telephone[phone]
S. Landowner (s) of Record ( Use blank page to list additional owners.):
ender County Board of: Education
Name (s)
P.O. Box 1239
Current Mailing Address Current Street Address
Burgaw, North Carolina
28425
City State
Zip
City State Zip
0757
209-211
10. Recorded in Deed Book No.
462
Page No. 223
'
Part B.
454
138
1. Person (s) or firms (s) who are financially responsible for this land -disturbing activity (Use the blank page to list
'
additional persons or firms) :
Wendell Pfurra
Name of Person (s)or Firm (s)
P.O. Box 1239_
'
Mailing Address
Street Address
Bur aw North Carolina
28425
City State
Zip
City State Zip
Teiep�one [phone]
Telephone

1
2 2, it Financially Responsible Party is not a resident of North Carolina give name and street address at
' a Nc,-?h Carolina Agent.
\/A
Na,—e
1
Mlailing Address Street Address
1
City State Zip City - State Zip
Telephone Telephone
(t) If the Financially Responsible Party is a Partnership or other person engaging In business under an
assumed name, attach a copy of the certificate of assumed name. If the financially Responsible Party is a
Cow ration give name and street address of the Registered Agent.
1
N/A
Name of Registered Agent
hailing Address Street Address
state Zip City State Zip
Telephone Telephone
The above information is true and correct to the best of my knowledge and belief and was provided by me
under oath. ( This form roust be signed by the financially responsible person if an individual or his attorney -in -
fact or if not an individual by an officer, director, partner, or registered agent with authority to execute instru-
ments for the finanacially responsible person j. f agree to provide corrected information should there be any
change in the information provided herein.
;,endell Murrav Superintendent
Type or p^name Title or Authority
Sign r Date_3 /S /
m
—mac 1l. f"1 N�'_ , a Notary Public of the County of / � ,,,4 ,
S:a:e of North Carolina, hereby certify that Ae At d e-%ZVk Y r o,
' araeared personally before me this day and being duly sworn acknowledged that t e above form was exe-
cLted by him.
Witness my hand and notarial seal, this IS "iday of /1j % , 19 `j /
t LIZA,
Notary
' My commission expires- �� _ •5� i r {i sJ
1

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APPENDIX V
D.E.M. SUBMITTAL FORM -
FOR
PROJECTS USING DENSITY LIMITS
FOR
STOMMATER CONTROL

' DIVISION OF ENVIRONMENTAL MANAGEMENT
Submittal Form for Projects Using Density Limits for Stormwater Control
' PROjCCT DATA
Nane of Project: Topsail Middle School and Topsail' Elementary School Addition
Location (County, Township/hunicipalityl Address);
Pender Countv, Hampstead Township
P1pplicant Name: Pender County Board of Education
' mailing Address: P.O. Box 1239, Burgaw, North caroling 2 2
Phone No: [phone]
' Submittal Date: March, 1991
Erief Description (include map and appropriate drawings):
New Middle School and addition to existing Elementary School, both to be
located on campus of existing Topsail High School.
water Body Receiving Stormwater Runoff:
Name of water Body: Unnamed tributary to Old Topsail Creek
Classification of (cater Body: SA
Total area of Proposed Project (acres): 36.6 acres
State/Federal Permits and Approvals Required:
(Check Appropriate Blanks)
CH -.'!A major Sedimentation and Erosion Control X
40,; Permit DEm/DHS Sewage Disposal X
Lather (specify):
C1,LCULAT i ON OF BUILT -UPON AREA
is ilt-upDn area means that portion of an individual development that is
ccvered try impervious or partially pervious cover including buildings,
pa\-e,nent, recreation facilities, etc. but not including decking.)
' a) 5uslt-upon area: 6.4 ac.
b) Total project area: 36.6 ac.
built -upon = built-upon'.area / total project area * 100
built -upon area = 17.5
If the water body receiving Stormwater runoff is Classified as SA, is the
built -upon area C 25% 7' Yes X No
1 If the Hater body receiving stormwater runoff is classified other than SA,
i5'tN0 Y. built -Upon area C 30 7 ? Yes No
SlSTEN '
;5 tile' on )' kind of stormwater Collection `.:ystLIM grasti 5waIos7
t �cS t�J X
(Crasseu- Iii}ed S.:aIe5 s'huuId have i siu0 slope of 3:1 (H.'V) or les',.)
Seine piping from building areas to on -site drainage ditches and swales.

1 11 no', please provide a detailed description.
'
E.:F F ER AtiEA
Is the
built -upon area
at least 30 feet from mean high water of all
surface?
waters? Yes '
X No
If no,
please provide
.
a detailed description.
iNote:
Only boat ramps, public roads, put)lic bridges and walkways to rater
related
facilities are
allowed within 30 feet of mean high water if the
project
is intended to
meet stormwater control requirements through
density
limits.)
FEED nESTRICTIONS AND PROTECTIVE COVENANTS
Do the deed restrictions and protective covenants ensure that subdivisions
maintain the development consistent with the plans and specifications
approved t:y the division and include the State as a beneficiary of the
restrictions?
Ves No NIA
(Include a copy of the restrictions and covenants with this form.)
CERTIFlCATIO�'�
!+ ,%endell Murray , certify that the information included on
this sut.nittal form is correct, that the project will tie constructed in
conformance with this information and that to the best of my knowledge) the
tree best of my knowledge, the.proposed project complies with the requirement
1 of 15 NCAC 2H.1003 (b).
2��,fLl !"g">
is
Signature- Owner or t pate
Pender County Board o Education, P.O. Box 1239
Address Burgaw, North Carolina 28425
' if anent, please list owner's name and address below.
DIVISION OF ENVIRONMENTAL_ MANAGEMENT SIGN OFF
Re,icnal Office
Date Individual Evaluating Forms / Plans
DatL? Regional Water OuaIity Supervisor