SW8021016_COMPLIANCE_20040520

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW
DOC TYPE
❑ CURRENT PERMIT
❑ APPROVED PLANS
❑ HISTORICAL FILE
P;ICOM . PLIANCE EVALUATION INSPECTION
DOC DATE
YYYYMMDD

r� w
State of North Carolina
Department of Environment
and Natural Resources
Wilmington Regional Office
Division of Land Resources
Land Quality Section
Michael F. Easley, Governor
William G. Ross Jr., Secretary
NCDENR
ENVIRONMENT AND NxruRIL Re5C>URCES
May 20, 2004
NOTICE OF VIOLATIONS OF THE
SEDIMENTATION POLLUTION CONTROL ACT
CERTIFIED MAIL 7003 2260 0006 5580 4299
RETURN RECEIPT REQUESTED
Ashley Ridge Housing Associates, LLC
Mr. Lyle Gardner,
7706 Six Forks Road -Suite 202
Raleigh NC 27615
Project Name: Ashley Ridge Apartments
Project No: PE-03091
Pender County
Dear Mr. Gardner:
On May 18, 2004, personnel of this office inspected a project located on West Drane Street in Pender County,
North Carolina. This inspection was performed to determine compliance with the North Carolina Sedimentation Pollution
Control Act of 1973. The inspection revealed a land -disturbing activity of approximately 1.81 acres being conducted.
It is our understanding that you and/oryou rfirm are responsible for this land -disturbing activity. The purpose
of this letteristo inform you thatthis activity wasfound to be in violation of the Act, NCGS 113A-50 to 66, and Title 15A,
North Carolina Administrative Code, Chapter 4. If you feelthatyou are not responsibleforthe following violations, please
notify this office immediately.
The violations that were found are:
1. Failure to take all reasonable measures to protect all public and private property from damage bysuch
land -disturbing activities. 15A NCAC 413.0005.
Erosion control measures, such as the rip -rap scour pads, have not been installed per the
approved plan.
Fa ilure to maintain satisfactorily all temporary and permanent erosion and sedimentation control
measures and facilities during the development of a site. 15 NCAC 413.0113.
Silt fence around the perimeter of the property and at the catch basins has not been properly
maintained.
To correct these violations, you must:
Take all reasonable measures to protect all public and private property from damage by such
land disturbing activities.
Maintain, repair, and/or restore erosion control measures.
127 Cardinal Drive Extension, Wilmington, N.C. 28405-3845 • Telephone [phone] • Fax [phone]
An Equal Opportunity Affirmative Action Employer

Mr. Lyle Gardner
May 20, 2004
Page 2
The initial one day civil penalty could bean assessment of up to $5,000.00. A time period for compliance is not
required forthis initial one day civil penalty pursuant to NCGS 11 3A-61.1 (c) and NCGS 113A-64(a)(1).Aninitial one day
civil penalty is being considered for this project.
If the violations described in this Notice are not corrected within 20 days following your receipt of this Notice,
the Division of Land Resources may take additional appropriate legal action against you pursuant to NCGS 113A-64. That
action could be the assessment of additional civil penalties and may result in the initiation of other remedies as
prescribed by the Act. If additional civil penalties are assessed forthe violations, theamount may be up to $5,000.00 per
dayfor each day of the violation pursuant to NCGS 133A-64(a)(1). If all violations are corrected within the time period
specified for compliance, additional civil penalties or legal remedies will not be pursued.
Any new land -disturbing activity associated with this project should not begin untilthe area presently disturbed
is brought into compliance with the Act. When corrective actions are complete, you should notify this office so thatthe
work can be inspected. You should not assume that the site is in compliance with the Act until we have so notifred you.
In addition, once compliance has been achieved, all installed measures must be satisfactorily maintained until
development is complete and the site is fully stabilized to avoid further violations of the Act.
We solicit your cooperation, and would like to avoid taking further enforcement action. Atthe same time, it is
your responsibility to understand and comply with the requirements of the Act. Copies of the relevant statute and
administrative rules maybe examined at this office orwill be sentto you upon request. Should you have questions
concerning this Notice or the requirements of the Act, please contact either Trentt James or me at your earliest
convenience.
Please do not hesitate to contact me regarding any questions you might have about this matter.
Sincerely,
C4't/ V L-- 14.
Carol N. Miller,CPESC
Acting Regional Engineer
DES/-rJ/asb
cc: Sedimentation Specialist
<31 WiRO-LOS
—D�WQ -WiRO�
Enclosure: Inspection Report

County .
Person F
Address:
Case #
NORTH CAROLINA DEPARTMENT OF ENVYRONMENTAND NATURAL RESO URCES
LAND QUALf7YSEC770N.• 127 Cardinal Drive, Ext., Wilmington, NC28405-3845 (00) 395-3900 r
—�q- Project: _' AS�1 E�! Q t og�,I c _ h P A iZTM E N tS River Basin C x e C Tr- P-Q-
ible: FtSr1���- 1Z�ta�E 1-)D�SIyL ASSdc,Ltr�/1 Ot LILF r-1Pttf1j6LPr6ject# 4��%rn+'ZCG'j=07f
1. Project. Location 1"L [D'ZAoC S-T Pictures: No ❑ Yes }a P,-t,_U Slides ❑ Di italA Video ❑
2. Weather and Soil Conditions C c c,, 0 g 7 Q
3. is site currently under notice of violation? Yes ❑ No,'&
4. is the site in compliance with the S.P.C.A. and the rules? Yes ❑ No If no, check violations below:
5. Violations:
❑ a. No approved plan, G.S. 113A-57(4) and 15A NCAC 4B.0107(c) ❑ g. Inadequate buffer zone, G.S. 113A-57(1)
0 b. Failure to follow approved plan, G.S.113A-61.1 . ❑ h. Graded slopes and fills too steep, G.S. 113A-57(2)
❑ c. Failure to submit revised plan, G.S. 113A-54.1(b) and or 15A NCAC 4B.0124(d)
15A NCAC 4B.01H(a) . ❑ i. Unprotected exposed slopes, G.S. 113A-57(2)
❑ d. Failure to provide adequate groundcover, G.S. 113A-57(3) and}... Failure to maintain erosion control measures,
15A NCAC 4B.0107(b) or 15A NCAC 4B•0124(e) 15A NCAC 413.0113
❑ e. Insufficient measures to retain sediment on site, G.S. 113A-57(3) ❑ k. Other (describe)
;Wf. Failure to take all reasonable measures, 15A NCAC 4B.0105 q
6. NPDES Permit Violation? YesJ@ No ❑ Describe 1Ni i-r s . �- c . A, _
7. Has sedimentation damage occurred since last inspection? Yes ❑ If yes, where? (check all that apply): No
Lake/natural watercourse on the tract ❑ Lake/natural watercourse off the tract ❑ Other property ❑
Description:
Degree of damage: Slight ❑ Moderate ❑ Severe El8. Contact made with (Name) X . D7 D fUG r Se' � Suf L�IIr�SE /C Cal 51 7Z Title
Inspection Report given ❑ or sent.3 to Person Financially Responsible Date given/sent _
9. Corrective actions needed:
o �
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n i2 ('. rz n Z j7 4fPA,.f- tr'rL,-� .S1CN Gryv rn-.?L. GvaSL R t:�C
10.11Comme/nts: l'JI
£17r-C/7 f
H-,4 ? X
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Report by: 1 R c u Iz M CA _ Others present
Date of Inspection: 5 �18 /G It Time arriving at site:
Time leaving site: ' / 7 ; yd

DETENTION POND ANALYSIS FILE NAME: G:IDATAIWPDATAIWQSIPOND1021016.WK1
PROJECT #: SW8 021016 REVIEWER: L. Lewis
PROJECT NAME: Ashley Ridge Apartments
DATE:
17-Dec-02
Receiving Stream:
Burgaw Creek
Class:
C Sw
Drainage Basin:
Cape Fear
Index No.
CPF23 18-74-39
Site Area
1.81
acres
Drainage Area
78844 QY
square feet
Area =
1.81 acres
IMPERVIOUS AREAS
Rational C
Buildings
15237.00
square feet
1.00
Parking
18536.00
square feet
1.00
Walks, gazebo, and
Dumpster
6172.00
square feet
1.00
square feet
square feet
square feet
TOTAL
3994501?'.
square feet
Rational Cc=
SURFACE AREA CALCULATION
% IMPERVIOUS 50.66%
Des. Depth 4
TSS: 90
SA/DA Ratio 4.37%
Req. SA 3443 sf
Prov. SA 352Q: sf
VOLUME CALCULATION * place a "1" in the box if Rational is used
Rational ?"
Des. Storm
1 0.' inches
Rv=
0.51
Bottom
36.8 msl
Perm. Pool
msl
Design Pool .
42.4 msl
Design SA
4929 sf
Req. Volume
657 cf
Prov. Volume
..>`.K:67.5. cf
ORIFICE CALCULATION
FOREBAY
Perm. Pool Volume=
Req. Forebay Volume=
Provided Volume=
Percent=
SA @ _
Elevation=
1550 00
.�0
Avg. Head =
0.78
ft
Q2 Area =
1.29
sq. in.
Flow Q2, cfs
0.038
cfs
Q5 Area =
0.52
sq. in.
Flow Q5, cfs
0.015
cfs
Orifice Area
0.79
sq. in.
No. of Orifices
,:
Q=
0.023
cfs
Diameter, inches
.(}U,';
weir H x W
m
....... i
x
:.. :..... , in
Drawdown = [ 5 .I days
COMMENTS
Surface Area , Volume and Orifice are within Design GuidelineE

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TECHNICAL SPECIFICATIONS
FOR.. .
STORMWATER DETENTION POND
TO SERVE
ASHLEY RIDGE APARTMENTS
BURGAW, NORTH CAROLINA
OWNER:
ASHLEY RIDGE HOUSING ASSOCIATE
Jacksonville, North Carolina
RECEIVED
OCT 1 1 2002
OCTOBER 2002
FO
Q
PROJ # ` 2/01 Cv
,•`''ZH CAROB"",,
r
SEAL
'• 14125 o '
pN R. MAP
11111f
PARKER & ASSOCIATES, INC.
Engineering - Surveying - Land Planning
P.O. Box 976
Jacksonville, North Carolina 28541
910-455-2414

(;opyright ® 2002 by parker & Associates, Ine.
All rights reserved. No part of this documentwithout print
be reproduced in any form or by any
written permission. Use of this document, except by
them expressly authorized, is strictly prohibited.

PROJECT INFORMATION SHEET
OWNER:
Ashley Ridge Housing Associates, LLC
7706 Six Forks Road, Suite 202
Raleigh, NC 27615
Contact Person: Mr. Tim Morgan
[phone]
ENGINEER:
Parker & Associates, Inc.
P.O. Box 976
Jacksonville, NC 28541-0976
Contact Person: Gordon R. McAdams, P.E.
[phone]
c I .GRM.AshIeyRidgc.pond.cov

ASHLEY RIDGE APARTMENTS
TABLE OF CONTENTS
ITEM
COVER SHEET
PROJECT INFORMATION SHEET
TABLE OF CONTENTS
GENERAL REQUIREMENTS
SITE WORK
STORMWATER APPLICATION
WET DETENTION BASIN SUPPLEMENT
STORMWATER NARRATIVE
ENGINEERING CALCULATIONS
cl.G'RMAAshleyRldge.pond.cov
NO. OF PAGES
1
1
1
GR 1-4
SW 1-5
1-4
1-4
1
1-5
0

' GENERAL REQUIREMENTS
1. .SUMMARY OF .,WORK"..,;
' The CONTRACTOR'for`this section shall furnish all materials,'
supplies, equipment, labor, tools and all other incidentals
necessary to construct the Stormwater Detention Pond and
appurtenances, complete, and ready for use, as shown on the
plans and as enumerated herein.
' Work necessary for the construction of the Stormwater Pond
includes but is not limited to clearing and grubbing,
dewatering, excavation, backfill, install piping system,
' grassing, and erosion control as shown on the plans and as
outlined hereinafter.
2. FIELD ENGINEERING
' A. OWNER will establish base lines for Project and a site
benchmark for use by the CONTRACTOR. OWNER will furnish
boundary surveys if required.
B . CONTRACTOR shall:
' 1.. Develop and make all detail surveys and measurements
needed for construction including slope stakes,
batter boards, and all other working lines,
' elevations and cut sheets.
2. Be solely responsible for all locations, dimensions
' and levels. No data other than written orders of
the ENGINEER shall justify departure from the.
dimensions and levels required by the Drawings.
' 3. Safeguard all points, stakes, grade marks, monuments
and bench marks made or established on the work, re-
establish same if disturbed and rectify all Work
' improperly installed because of not maintaining, not
protecting or removing without authorization such
established points, stakes, marks and monuments.
' 4. When requested by ENGINEER, provide such facilities
as may be necessary for ENGINEER to check line and
grade points placed by CONTRACTOR. Where
' applicable, CONTRACTOR shall do no excavation or
embankment work until cross -sectioning necessary for
determining pay quantities has been completed and
' checked by ENGINEER.

I
GR_2
1
1
3. SUBMITTALS
The CONTRACTOR shall a minimum of three (3) copies of all
submittals of the various materials and products to the
ENGINEER for approval. Of these, one (1) copy will be
returned to the CONTRACTOR.
Each -set of ` submittals.. 'shall.,. include but not be` limited tc
I. Drawings showing all dimensions units and locations of
all other accessory equipment, including a piping layout.
2. All technical information needed by the ENGINEER to
determine if the proposed equipment meets the plans and
specifications.
4. TESTING LAB SERVICES
A. General: Testing of materials, testing for moisture
content during placement and compaction of fill
materials, and of compaction requirements for compliance
with technical requirements of the specifications shall
be performed by a testing laboratory.
B. Testing Services:
1. Test the CONTRACTOR'S proposed materials in the
laboratory and/or field for compliance with the
specifications.
2. Perform field moisture content and density tests to
assure that the specified compaction of backfill
materials has been obtained.
3. Report all test results to the ENGINEER and the
CONTRACTOR.
C. Authority and Duties of Testing Agency: Technicians
representing the testing laboratory shall inspect the
materials in the field and perform tests, and shall
report their findings to the ENGINEER and the CONTRACTOR.
when the materials furnished or work performed fails to
fulfill specification requirements, the technician will
direct the attention of the ENGINEER and CONTRACTOR to
such failure.
The technician shall not act as foreman or perform other
duties for the CONTRACTOR. Work will be checked as it
progresses, but failure to detect any defective work
or materials shall not in any way prevent later rejection
when such defect is discovered, nor shall it obligate the
ENGINEER for acceptance. Technicians are not authorized
to revoke, alter, relax, enlarge, or release any
requirements of the specifications, nor to approve or
accept any portion of the work.

' GR-3
D. Respcnsibilities,and Duties of CONTRACTOR: The use of
testing services shall in no way relieve the CONTRACTOR
of his responsibility to furnish materials and
' construction in full compliance with the drawings and
specifications.
To facilitate testing.-services;.the CONTRACTOR shall:
' 1. Secure and deliver to the testing agency, without
cost, preliminary representative samples of the
materials he proposes to use and which are required
to be tested.
2. Furnish such casual labor as is necessary to obtain
and handle samples at the project or at other
sources of material.
' 3. Advise the testing agency sufficiently in advance of
operations to allow for completion of quality tests
and for the assignment of personnel.
INSPECTION/CERTIFICATION
' Inspection by an ENGINEER is required in order to issue the
Certification of Construction as required by the Division of
Water Quality to assure the pond is built according to the
plans and specifications.
' Parker & Associates, Inc., as ENGINEER, if authorzed by the
OWNER, will provide inspection throughout the performance of
' this Contract. Inspections will be made periodically or on a
full time basis as the work progresses to insure compliance
with these specifications and with the specification
requirements shown on the plans. When requested by the
ENGINEER, CONTRACTOR shall provide his services .to insure to
the ENGINEER's satisfaction that all dimensions, lines and
grades are as designed. In order for the ENGINEER to
' adequately inspect and approve this construction, testing
services shall be provided by an approved testing laboratory.
GUARANTEE OF WORK
A. Except as otherwise specified, all work shall be
' guaranteed by the CONTRACTOR and his sureties against
defects resulting from the use of faulty or inferior
materials, equipment, or workmanship for 12 months from
' the date of final completion of the work as signified by
acknowledgement of receipt of Final Payment by the
CONTRACTOR.
' B. If, within any guarantee period, repairs, or changes are
required in connection with guaranteed work, which, in
the opinion of the ENGINEER, are rendered necessary as

GR-4
the result of the use of materials, equipment, or
workmanship, which are inferior, defective, or not: in
accordance with the terms of the CONTRACT, the CONTRACTOR
shall, promptly upon receipt of notice from the OWNER,
'
and without expense to the OWNER:
? .. Place...,. in satisfactory- -.condition, in every
'
particular, all'of'such guaranteed .wo.'k.'
2. Correct all defects therein.
1
3. Make good all damage, to the site, which in the
opinion of the ENGINEER, is the result of the use of
materials, equipment, or workmanship which are
inferior, defective, or not in accordance with the
'
terms of the CONTRACT.
'
4. Make good any work or material, or the equipment and
contents of said building site, disturbed in
fulfilling any such guarantee.
C. If in fulfilling the requirements of the CONTRACT or of
'
any guarantee embraced therein or required thereby, the
CONTRACTOR disturbs any work guaranteed under another
CONTRACT, he shall restore such disturbed work to
condition satisfactory to the ENGINEER, and shall
guarantee such restored work to the same extent as it was -
guaranteed under such other CONTRACT.
D. If the CONTRACTOR, after notice, fails to proceed
promptly to comply with the terms of the guarantee, the
OWNER may have the. defects corrected and the CONTRACTOR
'
and/or his Surety shall be liable for all expenses
incurred.
' E. All special guarantees applicable to definite parts of
the work that maybe stipulated in the specifications or
other papers forming a part of the CONTRACT shall be
t subject to the terms of this section during the first
year of the life of such special guarantee.

1
1
1 SITE WORK
1.- -CLEARING'AND GRUBBING
Clearing shall consist of the cutting, removal, and
satisfactory disposal of all trees, down timber, project
roots, stumps, lap woad rubbish, trash, and all other
objectionable material within the construction limits as
directed. Any specific trees or shrubs designated to be saved
by the OWNER shall be protected from injury during
' construction.
1 Grubbing shall consist of the excavation, removal,. and
disposal of all stumps, roots, logs, and other perishable
and objectionable material within the construction limits
as directed. .
eAll clearing and grubbing shall be accomplished in such a
manner as not to injure or destroy any merchantable timber or
1 other property on land adjacent to the project site.
Before any burning of debris shall occur, contractor shall
contact owner and engineer for permission and location and
1 contractor will be required to secure ANY and ALL burning
permits required. All perishable material shall be burned in
such a manner as not to injure trees or shrubs outside the
' project site or any tree or shrub designated to be saved. Any
material that cannot be completely burned will be removed and
disposed of at an off -site location at the expense of the
1 contractor. If burning is not allowed, contractor is
responsible to remove all material from the site.
2. EXCAVATION AND GRADING
All grading and excavation shall be in accordance with typical
dimensions and cross -sections shown on the plans and
1 specifications contained herein.
During excavation all topsoil suitable for reuse shall be
stockpiled in an area designated by the OWNER. All soils
' suitable for reuse as backfill material shall be stockpiled in
a separate area designed by OWNER. All soils unsuitable for
reuse shall be stockpiled in a separate location as designated
1 by the OWNER. Services of the testing laboratory shall be
used to determine which soils are best suitable for reuse as
backfill.
in areas requiring back fill to construct the pond dikes, a
minimum of 12-inches of topsoil and subsoil stripping shall
occur prior to the commencement of backfill.
1

1 SW-2
3. DEWATERING.
1. The CONTRACTOR shall provide and maintain adequate
' dewatering equipment to remove and dispose of all surface
and ground water entering excavations, trenches, or other
parts - of... the work.. Each excavation shall. be kept - dry
'duringsubgrade preparation and "continually thereafter until the' -structure to be -built,- or the pipe to be
installed therein is completed to the extent that no
damage from hydrostatic pressure, flotation, or other
cause will result.
A. The working areas on the site (exclusive of sediment
1 entrapment devices) shall be kept free of surface
water at all times. The CONTRACTOR shall install
drainage ditches and dikes and shall perform all
' pumping and other work necessary to divert or remove
rainfall and all other accumulations of surface
water from the excavations and fill areas. The
diversion and removal, of surface eater shall be
' performed in a manner that will prevent the
accumulation of water behind temporary structures or
at any other locations within the construction area
' where it may be detrimental.
B. water used for working or processing, resulting from
dewatering operations, or containing oils or
' sediments that will reduce the quality of the water
sediments that will reduce the quality of the water
downstream of the point of discharge shall not be
directly discharged. Such waters shall be diverted
through a settling basin or filter before being
discharged.
' C. The CONTRACTOR is responsible for the condition of
any pipe, conduit or channel which he may use for
drainage purposes and all such pipes, conduits or
' channels shall be left clean and free of sediment.
2. The CONTRACTOR shall provide, install, and operate
' sufficient trenches, sumps, pumps, hose, piping,
wellpoints, deep wells, etc., necessary to depress and
maintain the ground water level below the base of the
' excavations during all stages of construction operations.
The ground water table shall be lowered in advance of
subgrade excavation and maintained two feet below the
lowest subgrade excavation made until the structure has
' sufficient strength and weight to withstand horizontal
and vertical soil and water pressures from natural ground
water. The system must be operated on a 24-hour basis
' and standby pumping facilities and personnel shall be
provided to maintain the continued effectiveness of the
system. If, in the opinion of the ENGINEER, the water
levels are not being lowered or maintained as required by

Svi-3' ..
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I
these.specificat-ion, the CONTRACTOR shall
additional or alternate dewatering devices
at no additional cost to the OWNER.
BACKFILL
install
as necessary,
After completion -of stxipping'..the area to�receive' embankment
backfill and compaction', 'the CONTRACTOR shall place"cbm' pacted
backfill to construct the dikes for the stormwater pond in
accordance with typical dimensions and cross -sections shown on
the plans and requirements contained in the specifications
herein.
Any soft areas of subgrade containing unsuitable, wet or
yielding material not readily capable of site compaction shall
be removed and replaced with compacted select borrow material.
Services of a testing laboratory shall be used to determine
which soils are suitable as select borrow material.
All fill shall be placed in horizontal loose lifts not
exceeding 9-inches in thickness and shall be mixed and spread
in a manner assuring uniform lift thickness after placing.
Each lift shall be compacted by not less than two (2) complete
coverages of the specified compactor. The compaction of the
complete area of the backfill shall have i minimum compacted
density of 95 percent as obtained by test procedures in ASTM
D 1557 (modified proctor). Services of a testing laboratory
shall be required to provide the CONTRACTOR with the required
compaction density results to insure compliance with the above
required compaction density.
No fill material shall be placed when free water is standing
on the surface of the area where the fill is to be placed. No
compaction of fill will be permitted with free water on any
portion of the fill to be compacted. No fill shall be placed
or compacted in a frozen condition or on top of frozen
material. Any fill containing organic materials or other
unacceptable material previously described shall be removed
and replaced with approved fill material prior to compaction.
Each lift of compacted fill shall be compacted by the
designated number of'coverages of all portions of the
surface of each lift by a smooth -drum vibratory roller for
granular material having a static weight not less than 5,500
pounds, a sheepsfoot roller for cohesive material exerting a
pressure of 250 psi on the surface of the feet, or equivalent
equipment approved by the ENGINEER prior to commencement of
the work. One coverage is defined as the condition obtained
when subjected to the direct contact of the compactor. The
compactor shall be operated at a forward speed not exceeding
40 feet per minute.

1 S;•r-4
' In some aces where soft soils are removed, it may be difficult
to properly compact the first lift or two on the base of the
undercut area. If the base is excessively wet, a working mat
1 of compacted crushed stone shall be placed prior 'to placement
and compaction of the fill.
5. PIPING SYSTEM
A. GENERAL
' The piping system required shall be constructed and
installed as shown on the plans and as further described
herein. The stormwater pond piping system shall include
' but not be limited to one 18-inch outlet pipe, one 16- '
inch riser pipe, one trash rack, an anti -seep plate and
all appurtenances required for a complete installation.
' B. PIPING
The piping included shall be to the diameters and lengths
shown on the plans. These pipes shall be fabricated of
corrugated aluminum made from alloys of ALCAD 3004 or
5052. They shall be helically corrugated Corlix as
' manufactured by Kaiser Aluminum or an approved equal.
All welding required shall be done in the factory. The
units shall arrive to the site ready for installation.
' Flanges shall be welded to the pipes for easy
connections in the field. The flanges shall be bolted
together using 3/8-inch stainless steel bolts, nuts and
' washers and using 3/16-inch neoprene gaskets.
A trash rack shall be provided to the dimensions shown on
' the plan. The trash rack shall include an aluminum
grate top with %-inch opening welded to the top.
An aluminum anti -seep plate shall be provided and
' installed per the dimensions and locations shown on the
plans.
' 6. GRASSING
A. DIKES AND EMBANKMENTS
' The CONTRACTOR after grading and shaping the dikes and
remaining areas as shown on the plans, shall furnish
labor, tools and equipment to till and seed any and all
areas, as outlined hereinbefore under site work.
The entire area shall be given one application of
' agricultural lime at the rate of 2,000 pounds per acre;
super phosphate at 500 pounds per acre; a 12-4-8 grade
fertilizer at the rate of 600 pounds per acre, all
harrowed to a point that it is thoroughly mixed with the
1

1 SW-5
soil., The Contractor shall then furnish and sow, Rebel
Fescue seed, at the rate of 100 pounds per acre mixed
with 25 pounds per acre of Bermuda.
'
A suitable cover of straw mulch shall be placed at a rate
of ,1. 5 .to • 2 --tons per acre on the -entire-.area fbl lcwing
-the 'ent'ire' area -to prevent straw much from blowing
1
."the
away and to earlier germination. In'the case'
of extreme slopes, the straw mulch shall be stabilized by
the application of an asphalt or other approved binding
material,
The Contractor shall guarantee a full stand of grass over
the entire area. A stand of grass shall be considered
acceptable when cover is at least 95
percent.
7.
EROSION AND SEDIMENT CONTROL MEASURERS
The erosion and sedimentation control measures shown on
the plans and contained in the Contract Documents
indicate the approximate locations of those measures on
'
the basis of the existing topography within the area or
on the basis of the predetermined need for any specific
area. Upon commencement of the operations in those areas
'
where measures are proposed, the ENGINEER may make minor
adjustments in location. CONTRACTOR shall note and
observe all conditions as outlined in the Erosion and
'
Sedimentation Control Approval Letter.
It will be the CONTRACTOR'S responsibility to provide the
'
erosion and sediment control measures as shown on the
plans or as otherwise specified in the Contract Documents
or as directed by the Engineer. The CONTRACTOR is
cautioned that these facilities will be installed as
'
shown on the plans and/or as directed by the ENGINEER
during the construction process. Any citations,
penalties, or fires issued by the N.C. Department of
Environment and Natural Resources or any other agency
'
resulting from negligence of the CONTRACTOR shall hold
the ENGINEER or OWNER harmless from any resulting damages
'
or fines.

:. QFFLCE USE ONLY .
Date Received Fee Pair} Permit Number
State of North N r o Carolina
' Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This form may be photocopied far use as an `orid na1
I.
GENERAL INFORMATION
1.
Applicants name (specify the name of the corporation, individual, etc, who owns the project):
Ashley Ridge Housing Associates, LLC
'
2.
Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
Lyle Gardner Managing Member
'
3.
Mailing Address for person listed in item 2 above:
7706 Six Forks Road Suite 202
'
City Raleigh State: NC Zip: 27615
4.
Telephone Number: 91 9 8 4 8— 2 0 41
Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
Ashley Ridge Apartments_
'
5.
Location of Project (street address):
West Drane Street
City: Bur aw County: Pender
'
6.
Directions to project (from nearest major intersection):
From intersection of Hwy 53 and Hwy 117A take_ Bridgers Street to
'
Dickinson Street; turn right on Dickinson Street;
pro'ect site is on
intersection
et
ortK side of es rane St. at with
Dic inson tre
7.
Latitude: 340 3 3' 23 .0 4" [3 Longitude: 770 5 5' 37 .4 4" W
of project
8:
Contact person who can answer questions about the project:
Name: Gordon R. McAdams, P.E. Telephone Number: 910
455--2414
1
II.
PERMIT INFORMATION:
'
1.
Specify whether project is (check one): X New Renewal
Modification
1
Form
SVJU-101 Version 3.99 Page 1 of 4

2, If this application is being submitted as the result of a renewal or modification to an existing permit, list the
existing permit number
0 and its issue date (if known)
3. Specify the type of project (check one):
Low Density X High Density —Redevelop Ceneral Permit Other
4. Additional Project Requirements (check applicable blanks):
CAMA Major. XSedimentation/Erosion Control. 404/401 Permit NPDES Stormwater
Information on requ.1red state permits can be obtained by contacting the Customer Service Center at
1-87712'3-6748.
III. PROJECT INFORMATION
1. In the space provided below, sununaLize-how stormwater will be treated. Also attach a detailed narrative
(one to two pages), describing stofmwater management for the project.
Wet Detention Pond
I -
2- Stormwater runoff from this project drains to the Cape Fear River basin,
3. Total Project Area: 1 .81 acres 4. Project Built Upon Area: 51 %
5. How many drainage areas does the project have? 1
6. Complete the following information for each drainage area. if there are more than two drainage areas in the
project. attach an additional sheet with the information for each area provided in the same format as below.
Basm 6 -D" 'A"
. .. ..... ... ..
Receiving Stream Name Burqaw Creek
Receiving Stream Class C SW
Drainage Area 1.81 Acres
Existing Impervious` Area 0
Proposed Impervious*Area 0.92 Acres
% Impervious` Area (total) .51 %
. . . . . . . . . . . . . . . . . . . . . . . . .
ace,area .........
........
'gas...
On -site Buildings
15,237 S.F.
On -site Streets
On -site Parking & drive
18,536 S.F.
On -site Sidewalks
5,717 S.F. (Included
uilding Patios)
Other on -site
455 S.F. (Gazebo an
Dumpster Pad)
Off -site
ITotal: 39,945 S.F.
'otal:
Dppervibus area is defined as the built upon area including, but not limited to, buildings, roads, parking areas,
'. sidewalks, gra vel areas, etc. 0.92 Ac'res
IForm SWU- 10 1 Version 3,19
Page 2 of 4
I

1
7. How was the off -site impervious area listed above derived?
Til. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
The following italicized deed restrictions and protective covenants are required to be recorded for all
subdivisions, outparcels and, future. development prior to the sale of any.lot. If lot sizes vary significantly, a -table
listing each lot number, size and the allowable built-irpon area for each lot must be provided as anattachment."
1. The following covenants are intended to ensure ongoing compliance with state stormwater management permit number
as issued by the Division of Water Quality. These covenants may not be
changed or deleted without the consent of the State.
2. No more than N / A square feet of any lot shall be covered by structures or impervious materials.
Impervious materialsinclude asphatt, gravel, concrete, brick, stone, slate or similar material but do not include wood
decking or the watT surface of swimming pools.
' 3. Swales shall not be filled in, piped, or altered except as necessary to provide driveway crossings.
4. Built -upon area in excess of the permitted amount requires a state stormwater management permit modification prior to
construction.
' 5. All permitted runoff from outparc& or furum development shall be directed into the permitted stormwater control
system. These connections to the stormwater control system shall be performed in a manner that maintains the integrity
' and performance of the system as permitted:
By your signature below, you certify that the recorded deed restrictions and protective covenants for this project
' shall include all the applicable items required above, that the covenants will be binding on 0 parties and persons
claiming under their, that they will run with the land, that the required covenants cannot be changed or deleted
without concurrence from the State, and -that they will be recorded prior to the sale of any lot.
' V. SUPPLEMENT FORMS
' The applicable state stormwater management permit suppli:anent form(s) listed below must be submitted for each
BLIP specified for this project. Contact the Stnrrnwater and -General Per►nits Unit at (919� 733-5(III:i for the status
and a3milability of these forms.
' Form S`dVU-102 Wet Detention Basin Supplemmnt
Form SWU-103 infiltration Basin Supplement
Form SWU-104 Low Density Supplement
' Form SWU-10S . Curb Outlet System Supplement
Form SWU-I0& Off -Site System Supplement -
Force SWU-107 Underground Infiltration Trench Supplement
' Form SWU-108- Neese River Basin Supplement
Form SWU-109 Innovative Best Management Practice Supplement
Form SWU-101 Version 3.99
Page 3 of 4

VI. SUW M_TAL REQUIREMENTS
Only complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ).
A complete package includes all of the items listed below. The complete application package should be
'
submitted to the appropriate DWQ Regional Office.
I. Please indicate that you have provided the following required information by initialing in the space provided
next to each item.
Initials
• Original and one copy of the Stormwater Management Permit Applicaf on ForrrE
• One copy. of thaapplidable SupptementForrn(s) for e' ch BMP
Permit application processing fee of S420 (payable to NCDENR)
• Detailed narrative description of sto rnwater treatment/management
• Two copies of plans and speciticatiom, including
_Development/Project name
Engineer and firm
- Legend
- North arrow
- Scale
Revision number & date
Mean high water tire
D pensioned property/project boundary
'
- Lin map wig mmned streets or NCSR amnbers
- Original contours, proposed contours, spot elevations, finished floor etevations
Det&ls of roads, diainagL-Eatrres, collection systems, and starrnwater control measures
t
Wetlands delineated, or a -note on plans that none exist
-Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations
- page areas delineated
'
- v fated buffers ( erequ4ed)
VU AOENTAUTHORQATION
'
If you wish to designate authority to another individual or firm so that they may provide information on your
behalf, please complete this section.
Gordon R. McAdams, P.E.
Designated agent(individualorfirrn): Parker & Associates, Inc,
Mailing Address; P.O. Box 976 --
'
City: Jacksonville State: NC zip: 28541 —0976
Phone: ( 910 1 455-2414 _ Fax: [phone]
1 VIII. APPLICANT'S CERTIFICATION
I, (print or type narne of person listed irr General Information, item 2) Lyle Gardner
' certify that the information included on this pem-dt application form is, to the best of my knowledge, correct and
that the project will be constructed in conformance with the approved plans, that the required deed restrictions
and protective covenants will be recorded; and that the proposed project complies with the requirements of 15A
' NCAC 2 H .1040. f
Signature: C1 , '��"?� Date: `�� Z31'D L
1
Form SWU-101 Version 3.99 Page 4 of 4

1
Permit No.
' (to be provided by DwQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
' WET DETENTION BASIN 'SUPPLEMENT
Ms form may be photocopied for use as an original
' DWO Stormwater Management Plan, Review:
A complete stormwater management plan submittal includes an application form, a wet detention basin
supplement for each basin, design calculations, and plans and specifications showing all basin and outlet
' structure details.
I. PROTECT INFORUNIATION
Project Name: Ashley Rid e Apartments
Contact Person: Gordon R . McAdams, P . E , phone Number: 91 0 4 5 5 — 2 41 4
' For projects with multiple basins, specify which basin this worksheet applies to: N / A
elevations
Basin Bottom Elevation
Permanent Pool Elevation
Temporary Pool Elevation
36.8
ft.
40.8
ft,
42.4
ft.
areas
Permanent Pool Surface Area
Drainage Area
Impervious Area
' volumes
Permanent Pool Volume
' Temporary Pool Volume
Forebay Volume
'Other parameters
' SA/DA I
Form SWU-102 Rev 3.99
'
Diameter of Orifice
Design Rainfall
Design TSS Removal z
(floor of the basin)
(elevation of the orifice)
(elevation of the discharge structure overflow)
3520 sq. ft. (water surface area at the orifice elevation)
1 .81 ac. (on -site and off -site drainage to the basin)
0.92 ac. (on -site and off -site drainage to the basin)
7692 cu. ft. (combined volume of main basin and forebay)
6578 cu. ft. (volume detained above the permanent pool)
1550 cu, ft. (approximately 20% of total volume)
4.4$
(surface area to drainage area ratio from DWQ table)
1 • 0 in. (2 to S day temporary pool draw -down required)
0 in.
90 % (minimum 85% required)
Page 1 of 4

1
Footnotes:
l When using the Division SAIDA tables, the correct SAIDA ratio for permanent pool sizing should be computed based upon the
actual impervious % and permanent pool depth. Linear interpolation should be employed to determine the correct value for non-
standard table entries.
2 In the 20 coastal counties, the requirement for a vegetative filter may be waived if the wet detention basin is designed to provide
90% TSS removal. The NCDENR BNT manual provides design tables for both 85% TSS removal and 90% TSS removal.
II. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Stormwater Best Management Practices Manual
1 (N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code
Section: 15 A NCAC 2H .1008.
Initial in the space provided to indicate the following design requirements have been met and supporting
documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit
Application Form, the agent may initial below. If a requirement has not been met, attach justification.
'
Applicants Initials
6n'--
a.
The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet). .
'
6A —
b.
The forebay volume is approximately equal to 20% of the basin volume.
6A-- -
c.
The temporary pool controls runoff from the design storm event.
'
6A—
d.
The temporary pool draws down in 2 to 5 days.
N/A
e.
If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow
calculations)
'
6 t''~
f.
The basin Iength to width ratio is greater than 3:1.
6"—
g.
The basin side slopes above the permanent pool are no steeper than 3:1.
'
GX -
h.
A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail).
('n'_
i.
Vegetative cover above the permanent pool elevation is specified.
6n'`
j.
A trash rack or similar device is provided for both the overflow and orifice.
t
N/A
k.
A recorded drainage easement is provided for each basin including access to nearest right-
of-way.
L
If the basin is used for sediment and erosion control during construction, clean out of the
basin is specified prior to use as a wet detention basin.
m.
A mechanism is specified which will drain the basin for maintenance or an emergency.
' III. WET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the
' vegetated filter if one is provided.
This system (check one) 0 does )9 does not incorporate a vegetated filter at the outlet.
' This system (check one) 0 does 4 does not incorporate pretreatment other than a forebay.
1 Form SWU-102 Rev 3.99 Page 2 of 4

Maintenance activities shall be performed as follows:
1. After every significant runoff producing rainfall event and at least monthly:
a. lnspect, the wet.detention basin system for. sediment accumulation, erosion, trash accumulation,
cover,c
. • vegetated ~ and gen
eral. . g condition'.
b. Check and clear the orifice of anobstructions such that drawdown of the temporary pool occurs within
Y P r}'
2 to 5 days as designed.
' 2. Repair eroded areas immediately, re -seed as necessary to maintain good vegetative cover, mow vegetative
cover to maintain a maximum height of six inches, and remove trash as needed.
3. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to maintain
proper functioning.
' 4. Remove accumulated sediment from the wet detention basin system semi-annually'or when depth is
reduced to 75% of the original design depth (see diagram below). Removed sediment shall be disposed of
in an appropriate manner and shall be handled in a manner that will not adversely impact water quality (i.e.
' stockpiling near a wet detention basin or stream, etc.).
The measuring device used to determine the sediment elevation shall be such that it will give an accurate
' depth reading and not readily penetrate into accumulated sediments.
When the permanent pool depth reads 3. 0 feet in the main pond, the sediment shall be removed.
' When the permanent pool depth reads 2 ' 2 5feet in the forebay, the sediment shall be removed.
' BASIN DIAGRAM
(ill in the blanks)
1 0 Permanent Pool Elevation 4 0. 8
' Sediment Re oval
3 7 . 8 %l El. 3 $-,, 5 5 75 6
-------------- - Sediment Removal Elevation 3 7 . 8 75/o
__-----�------------------------�------------ ----
Bottom Ele
Bottom Elevation 3 6 . 8 25%
' FOREBAY MAIN POND
' 5. Remove cattails and other indigenous wetland plants when the cover 50% of the basin surface. These
g p s y
' plants shall be encouraged to grow along the vegetated shelf and forebay berm.
6. If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through
the'einergency drain shall be minimized to the maximum extent practical.
1
1 Form SWU-102 Rev 3.99 Page 3 of 4

7. All components of the wet detention basin system shall be maintained in good working order.
1
I acknowledge and agree by my signature below that I am responsible for the performance of the seven
maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any
changes to the system or responsible party.
Print name: .le Gardner -
Title: - Managing Member
Address: 7706 _Six Forks Road, Suite 202
Phone: (91 9 ) 848--204
Signature:�r ^_
Date:
Note: The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and a
resident of the subdivision has been named the president.
I, ���'yrtGG , a Notary Public for the State of
County of I L/)44 ' , do hereby certify that L "b''v
personally appeared before me this �_ day of L f D , and acknowledge the due
execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal,
SEAL
My commission expires
I
Form SWU-102 Rev 3.99
Page 4 of 4

STORMWATER NARRATIVE
ASHLEY RIDGE APARTMENTS
The Ashley Ridge Apartments is a 20 unit apartment project off of West Drane Street in
Burgaw in Pender County. The.project will involve construction of asphalt.parking and ..
drive -areas, utilities,. and the apartment buildings.
Stormwater will be collected at Catch Basins and piped to a Wet Detention Pond. Roof
drainage will be collected and piped to the pond from the rear of the building. The total
site area including the Pond is 1.8 acres.
The project drains into a tributary to Burgaw Creek which is classified as CSW waters.
For additional information, see the plans and specifications, and the rest of the permit
application package.
c1.GRM.AshleyRidge, Nar.10.7.02

ASHLEY RIDGE APARTMENTS
BURGAW, NORTH CAROLINA
STORMWATER DETENTION POND
ENGINEERING CALCULATIONS
October 2002
1. AREA
Total Area Draining to Pond from Buildings, Drives, and
Parking Lot (including pond area).......... .1.81 Acres
Impervious Area:
Building, Drives & Parking 39,945 S.F. = 0.92 Acres
Percentrmperv.ious = .Impervious _ 0.92 _ 50.6 use 51%
total 1.81
2. PERMANENT POND SURFACE AREA
From Chart 4 - Appendix E from D.E.M. Report 87-05, for 51%
impervious (interpolate), 4.0 Ft. basin depth without
Vegetative Filter (90% TSS Removal) Yields SA/DA = 4.4%
1.81 acres x 4.4% = 0.0796 acres or 3469 S.F. surface area
required
Top of permanent pond elevation is 40.8
Area at 40.8 elevation = 3520 S.F. provided
3520 S.F. provided _>34.69 S.F.
required
3. TEMPORARY DETENTION STORAGE VOLUME
Retain I,, of runoff from area draining to pond
Total Area = 1.81 Acres
Total Runoff = 1.81 Ac.-In.

ENG-2
' Find Temporary Storage Volume
--1•.•81 Ac:-In.x 3,630 C'.F. 6 570 C.F. -re uired
Ac.=ln.
4, TEMPORARY DETENTION STORAGE VOLUME
Use 1.6
Ft.
Temporary Pool
Area at
40.8
elevation (permanent pond) =
3,520 S.F.
Area at
42.4
elevation (temporary pond) =
4,929 S.F.
'
Average
Area
= 4,224 S.F.
Storage
Vol.
= 4,224 S.F. x 1.6 Height =
6,758 C.F. iprovided
'
6,758 C.F.-Provided
> 6,570 C.F. required
O.K.
' 5. RELIEVE TEMPORARY STORAGE VOLUME IN 2 TO 5 DAYS
(Use Volume Required)
Q = CD AF2gh (orifice equation)
1
Q = 6,570 C.F. _ 2 days = 0.038 CFS
t Q = 6,570 C.F. - 5 days = 0.0152 CFS
Cd = 0.60
g = 32.2 ft/sec
h = 0.8 ft average height
' For 2 Day release
' Solve for A = Q = 0.038 = 0.0088 S.F.
CD 2gh (0.6) V2 (32.2) (0.8)
1
Solve for Orifice Diameter, D
' A = 0.0088 S.F. = n R1
R = 0.0529 FT. = 0.63 inch
' D = 1.27 inch
1

ENG-3
For 5 Day Release
Solve For A = Q _ 0.0152 = 0.0035 S.'F.''
CD 2gh (0. 6) 2 (32.2) (0.8)
Solve for Orifice Diameter, D
.A = 0.0035 S.F. = n R'
R = 0.0334 FT. = 0.40 inch
D = 0.8 inch
Use 1.0 inch diameter orifice
6. SIZE INLET RISER PIPE AND OUTLET PIPES TO HANDLE 10 YR. 1 HR.
STORM
A. Storm Flow
Q = CiA
A = 1.81 acres
C = 0.6
I = 2.88 in/hr - ten year, one hour
Q = 0.6 (2.88) (1.81) = 3.1. cfs
B. Inlet Riser Pi3pe
Water height before topping pond =
44.0 - 42.4 = 1.6
Q = Cd A 2gh (orifice equation)
Cd = 0.6 (typical value)
H = 1.6
Q = 3.1
2g = 64.4
Solve For A = Q = 3.1 = 0. 51 S. F.
CD V 2gh 0. 6 2 (32.2) 1.6

1
1
ENG-4
Solve for Riser Pipe Diameter, D
A 0.51 S.F. R2
= = n
R = 0 .'40 ft :. = 4 . 8 inches .
D =' 9.7. inches
. .
60,
Use 1-18" PiDe
P_
1
C. Outlet Pi e
'
1. Check Inlet Control
Use reference Chart 5, Bureau f public Roads
Jan. 1963
Setting invert of outlet pi at 40.8 with top
of pond at 44.0
Hw = 44 - 40.8 = 3.2
'
Assume 18" Diameter
Hw = 3.2 = 2.1
'
D 1.5
Entrance Type 1
'
From chart, Q = 3 CFS > 3.1 CFS O.K.
Use 1-18" pipe
'
7. 100 -YEAR FL D
II '
Q = CI
Compo ite C = 0.6
ioo = 4.15 in/hr for 1 hour duration
flood
= 1.81 Acres
'
Q = 0.6 (4.15) (1.81) = 4.5 CFS
Dsign
to handle 100-yr flood through riser and outlet
'
Ipes prior to topping pond
Top of pond = 44.0
'
A. Ris r Weir
As ume 18" pipe
'
=CdA 2 h
H = 44.0 - 40.8 = 3.2
1

RECEIVED
DEC 2 3 2002
DW
PROJ # Sw F� Z ICE , ENG - 5
A = R RZ = (1.5/2)2 = 1.77 ft2
Cd = 0.6
Q = 0. 6 (1.77) V2 (32.2) (3.0)
Q = 14.8 CFS > 10.3 CFS O.K.
B. Outlet Pipe
Use Chart 5, Bureau of Public Roads, Jan. 1963
Hw = 44.0 - 40.8 = 3.2
Diameter W 18"
Hw = 3.2 = 2.1.
D 1.5
From chart, Q = 13 CFS > 4.5 CFS O.K.
Riser and outlet pipes will handle 100 yr. storm. No
spillway required.
8. FOREBAY VOLUME
Forebay Volume shall contain approximately 20% of the Total
Basin volume. (Permanent Pool Volume)
CALCULATION OF PERMANENT POOL VOLUME
In Main Pond:
Bottom Area
- 12' X
47'=
564
Feet'
Permanent Pool
Area
71' X
361=
2556
Feet2
Average Area
- (564
+ 2556)
/
2
= 1560
Feet2
Permanent Pool
Depth
- 4 Feet
4 Feet X 1560
Feet'
= 6240
Fee t3
Forebay Volume
= 1550
Feet3
(See
Below)
Total Permanent
Pool
Volume =
6240
Feet2
+ 1550 Feet2
=
7790
Feet3
Forebay Volume provided:
SE Al ti
kv
REVISED 12/20/2002
C2.GRM.Ash1eyRidge.P95.ca1cs
Area at elevation 40.8 = 818 S.F.
Area at elevation 37.8 = 215 S.F.
Total = 1,033 S.F.
Average Area = 1,033 S.F./2 = 516.5 S.F.
Multinlv by 3.0' height= 516.5 x 3.0
Volume of forebay = 1,550 C.F. provided
1,550 C.F./7,790 C.F. = 19.9% O.K.

A i \�
;Y. i
A = n Rz = �1 (1 . 5/2 ) 2 = 1.77 ft2
Cd W 0.6
Q = 0.6(1:-77} 2(32.2) (3.2)
ENG-5
Q = 15.2 CFS > 4.5 CFS O.K.
B. Outlet Pipe
Use Chart 5, Bureau of Public Ro ds, Jan. 1963
Hw = 44.0 - 40.8 = 3.2
Diameter = 18"
HW = 3.2 = 2.1
D 1.5
From chart, Q = 13 CFS > 4.5 CFS O.K.
Riser and outlet ipes will handle 100 yr. storm. No
spillway required
8. FOREBAY VOLUME
Forebay Volume all contain approximately 20% of the Total
Basin volume. (Permanent Pool Volume)
Permanent poo volume = 7,692 C.F. 2 NC'w
Forebay Vol me provided:
Area at elevation 40.8 = 818 S.F.
Area at elevation 37.8 = 215 S.F.
Total = 1,033 S.F.
Average Area = 1,033 S.F./2 = 516.5 S.F.
Multi 1 by 3.0' hei ht= 516.5 x 3.0
Volume of forebay = 1,550 C.F. provided
1,550 C.F./7,692 C.F. = 20.2% O.K.
c1.GRM.Ashley.Ridge.Cal.Pond