SW8960124_Historical File_19990901

`Sta. of North Carolina
�-Department of Environment
and Natural Resources
Wilmington Regional Office
James B. Hunt, Jr., Governor
Wayne McDevitt, Secretary
Division of Water Quality
Mr. Dean A. Walters, CEO
Sea Trail Corporation
211 Clubhouse Road
Sunset Beach, NC 28468
Dear Mr. Walters:
lrIV :: T
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
September 1, 1999
Subject: Permit No. SW8 960124 Modification
Village on Royal Post Road
High Density Stormwater Project
Brunswick County
The Wilmington Regional Office received a complete modification to the Stormwater Management Permit
Application for Village on Royal Post Road on July 30, 1999. Staff review of the plans and specifications has
determined that the project, as proposed, will comply with the Stormwater Regulations set forth in Title 15A NCAC
2H.1000. We are forwarding Permit No. SW8 960124 dated September 1. 1999, for the construction of Village on
Royal Post Road.
This permit shall be effective from the date of issuance until September 1, 2009, and shall be subject to the
conditions and limitations as specified therein. Please pay special attention to the Operation and Maintenance
requirements in this permit. Failure to establish an adequate system for operation and maintenance of the stormwater
management system will result in future compliance problems.
If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an
adjudicatory hearing upon written request within thirty (30) days following receipt of this permit. This request must
be in the form of a written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed
with the Office of Administrative Hearings, P.O. Drawer 27447, Raleigh, NC 27611-7447. Unless such demands
are made this permit shall be final and binding.
If you have any questions, or need additional information concerning this matter, please contact Linda Lewis, or
me at [phone].
Sincerely,
Rick Shiver
Water Quality Regional Supervisor
RSS/arl: S:1WQSISTORMWAT1PERMIT\960124.SEP
cc: Jay Houston, P.E.
Delaney Aycock, Brunswick County Inspections
Linda Lewis
W ilinirgton Regional Office
Central Files
127 Cardinal Dr. Ext., Wilmington, North Carolina 28405 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/10% post -consumer paper

State Stormwater Management Systems
Permit No. SW8 960124 Modification
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
STATE STORMWATER MANAGEMENT PERMIT
HIGH DENSITY DEVELOPMENT
In accordance with the provisions of Article 21 of Chapter 143, General Statutes of North Carolina as amended, and
other applicable Laws, Rules, and Regulations
PERMISSION IS -HEREBY GRANTED TO
Sea Trail Corporation
Village on Royal Post Road
Brunswick County ,_
FOR THE
construction, operation and maintenance of 2 infiltration basins in compliance with the provisions of 15A NCAC
2H .1000 (hereafter referred to as the "stormwater rules') and the approved stormwater management plans and
specifications and other supporting data as attached and on file with and approved by the Division of Water Quality
and considered a part of this permit.
This permit shall be effective from the date of issuance until September 1, 2009 and shall be subj ect to the following
specified conditions and limitations:
I. DESIGN STANDARDS
1. This permit is effective only with respect to the nature and volume of stormwater described in the
application and other supporting data.
2. This stormwater system has been approved for the management of stormwater runoff as described on page
3 of this permit, the Project Data Sheet. Basin 1 of the stormwater controls has been designed to handle the
1 runoff from 190,619 ft2 of built -upon area, and Basin 2 has been deisgned to handle 59,677 ft2 of built -upon
area. Each of these basins must be operated with a 50' vegetated filter.
Approved plans and specifications for this project are incorporated by reference and are enforceable parts
of the permit.
4. The tract will be limited to the amount of built -upon area indicated on page 3 Hof this permit, and per
approved plans.
2

State Stormwater Management Systems
Permit No. SW8 960124 Modification
Project Name:
Permit Number:
Location:
Applicant:
Mailing Address:
Application Date:
Name of Receiving Stream/Index #:
Classification of Water Body:
If Class SA, chloride sampling result
Basin Number:
Basin Depth, feet:
Permanent Pool Elevation, FMSL:
Total Impervious Surfaces, ft2:
Offsite Area entering Pond, ft2:
Required Storage Volume, ft3:
Provided Storage Volume, ft3:
Temporary Storage Elevation, FMS
Expected Infiltration Rate:
Seasonal High Water Table Elevatio
Type of Soil:
Draw Down time:
DIVISION OF WATER QUALITY
PROJECT DESIGN DATA SHEET
Village on Royal Post Road
SW8 960124 Modification
Brunswick County
Mr. Dean A. Walters, CEO
Sea Trail Corporation
211 Clubhouse Road
Sunset Beach, NC 28468
July 30, 1999
Calabash Creek / (LBR 15-25-4)
"SA"
s: 68 ppm
2
3 1.75
23 28.5
190,619 59,677
102,802 None, per Engineer
126,815 4,868
146,850 4,867
L: 26 30.25
5 in/hr
n: 21 FMSL 26 FMSL
Kureb Sand
40 hours 28 hours
3

State Stormwater Management Systems
Permit No. SW8 960124 Modification
II. SCHEDULE OF COMPLIANCE
The stormwater management system shall be constructed in it's entirety, vegetated and operational for its
intended use prior to the construction of any built -upon surface except roads.
2. During construction, erosion_ shall be kept to a rninimum and any eroded areas of the system will be repaired
immediately.
3. The permittee shall at all times provide the operation and maintenance necessary to assure the permitted
st0miwater system functions at optimum efficiency. The approved Operation and Maintenance Plan must
be followed in its entirety and maintenance must occur at the scheduled intervals including, but not limited
to:
a. Semiannual scheduled inspections (every 6 months).
b. Sediment removal.
C. Mowing and revegetation of side slopes.
d. Immediate repair of eroded areas.
e. Maintenance of side slopes in accordance with approved plans and specifications.
f. Debris removal and unclogging of outlet structure, orifice device and catch basins and piping.
g. Access to the outlet structure must be available at all times.
h. The vegetated filter will be kept grassed with no erosion. The spreader mechanism will be kept free
of sediment and trash, and must distribute the runoff evenly over the width -of the filter.
4. Records of maintenance activities must be kept and made available upon request to authorized personnel
of DWQ. The records will indicate the date, activity, name of person performing the work and what actions
were taken.
5. Decorative spray fountains will not be allowed in the stormwater treatment system.
6. The facilities shall be constructed as shown on the approved plans. This permit shall become voidable unless
the facilities are constructed in accordance with the conditions of this permit, the approved plans and
specifications, and other supporting data.
7. Upon completion of construction, prior to issuance of a Certificate of Occupancy, and prior to operation of
this permitted facility, a certification must be received from an appropriate designer for the system installed
certifying that the permitted facility has been installed in accordance with this permit, the approved plans
and specifications, and other supporting documentation. Any deviations from the approved plans and
specifications must be noted on the Certification.
8. If the stormwater system was used as an Erosion Control device, it must be restored to design condition prior
to operation as a stormwater treatment device, and prior to occupancy of the facility.
9. The following items will require a modification to the permit:
a. Any revision to the approved plans, regardless of size.
b. Project name change.
C. Transfer of owriership.
d. Redesign or addition to the approved arnount of built -upon area. i
e. Further subdivision of the project area.
f. Filling in, altering, or piping of any vegetative conveyance shown on the approved plan.
10. The Director may determine that other revisions to the project should require a modification to the permit.
n

State Stormwater Management Systems
Permit No. SW8 960124 Modification
11. A copy of the approved plans and specifications shall be maintained on file by the Permittee for a minimum
of ten years from the date of the completion of construction.
12. Prior to the sale of any portion of the property, an access/maintenance easement to the stormwater facilities
shall be granted in favor of the permittee if access to the stormwater facilities will be restricted by the sale
of any portion of the property.
13. The permittee is responsible for verifying that the proposed built -upon area does not exceed the allowable
built -upon area.
14. The runoff from all built -upon area on the project must be directed into the permitted stormwater control
system.
15. The Director may notify the permittee when the permitted site does not meet one or more of the minimum
requirements of the permit. Within the time frame specified in the notice, the permittee shall submit a written
time schedule to the Director for modifying the site to meet minimum requirements. The permittee shall
provide copies of revised plans and certification in writing to the Director that the changes have been made.
III. GENERAL CONDITIONS
1. This permit is not transferable. In the event there.is a desire for the facilities to change ownership, or there
is a name change of the Permittee, a formal permit request must be submitted to the Division of Water
Quality accompanied by an application fee, documentation ffrom the parties involved, and other supporting
materials as may be appropriate. The approval of this request will be considered on its merits and may or
may not be approved.
2. Failure to abide by the conditions and limitations contained in this permit may subject the Permittee to
enforcement action by the Division of Water Quality, in accordance with North Carolina General Statute
143-215.6A to 143-215.6C.
3. The issuance of this permit does not preclude the Permittee from complying with any and all statutes, rules,
regulations, or ordinances which may be imposed by other government agencies (local, state, and federal)
which have jurisdiction.
4. In the event that the facilities fail to perform satisfactorily, including the creation of nuisance conditions,
the Permittee shall take immediate corrective action, including those as may be required by this Division,
such as the construction of additional or replacement stormwater management systems.
5. The permittee grants DENR Staff permission to enter the property for the purpose of inspecting all
components of the permitted stormwater management facility.
6. The permit may be modified, revoked and reissued or terminated for cause. The filing of a request for a
permit modification, revocation and reissuance or termination does not stay any permit condition.
Permit issued this the 1 st day of September, 1999.
NORTH CAP.QLINA El`d Y .LRONMENTAL MANAGEMENT COMLI✓iISSION
n Kerr. T. Stevens, Director�
Division of Water Quality
By Authority of the Environmental Management Commission
Permit Number SW8 960124
5

State Stormwater Management Systems
Permit No. SW8 960124 Modification
Village on Royal Post Road
Stormwater Permit No. SW8 960124
Brunswick County
Designer's Certification
I, , as a duly registered in
the State of North Carolina, having been authorized to observe (periodically/weekly/full time) the construction of
the project,
.(Project)
for (Project Owner) hereby state that, to the best of my abilities, due care
and diligence was used in the observation of the project construction such that the construction was observed to be
built within substantial compliance and intent of the approved plans and specifications.
The checklist of items on page 2 of this form is included -in the Certification.
Noted deviations from approved plans and specification:
Signature
Registration Number
Date
SEAL
6 0

State Stormwater Management Systems
Permit No. SW8 960124 Modification
Certification Requirements:
1. The drainage area to the system contains approximately the permitted acreage.
2. The drainage area to the system contains no more than the permitted amount of built -upon area.
3. All the built -upon area associated with the project is graded such that the runoff drains to the system.
4. The outlet/bypass structure elevations are per the approved plan.
5. The outlet structure is located per the approved plans.
6. Trash rack is provided on the outlet/bypass structure.
7. All slopes are grassed with permanent vegetation.
8. Vegetated slopes are no steeper than 3:1.
9. The inlets are located per the approved plans and do not cause short-circuiting of the system.
10. The permitted amounts of surface area and/or volume have been provided.
11. Required drawdown devices are correctly sized per the approved plans.
12. All required design depths are provided.
13. All required parts of the system are provided, such as a vegetated shelf, and a
forebay.
_14. The overall dimensions of the system, as shown on the approved plans, are provided.
cc: NCDENR-DWQ Regional Office
Delaney Aycock, Brunswick County Building Inspector
K
7

TYPICAL BUILDING PLAN
SCALE: 1 = 20'
-TbToL 50WARE F_obT AGE _ �i$,4-
STORMWATER
E C E I V E
D
PROD # &. � 24

e d
CD-4179 (42) Business Corporation North Carolina Ann
ip 2"S
This report may be flied online at the Secreiary of Stata websita: www_ger
Name ot&a.Corporatlon: SEA TRAIL CORPORATION
Date Filed: 5/10/2010 4:07:00 PM
Elaine F. Marshall
North Carolina Secretary of State
CA201014700681
Fiscal Year Ending: 12 31 09 State of incorporation: NC
Month 1 Day ! Year
Secretary of State lD Number: 0130555
❑I hereby certify that the Information requested below (required by NCGS W-16-22) hoe not changed since the most recently filed annual
repot and Is therefore complete.
Nature of Business: . GOLF . COURSE RESORT
Registered Agent JOHN WILLIAMS
Registered Office Mailing Address: 211 CLUBHOUSE ROAD
County: BRUNSWICK Cl* SUNSET BEACH State: NC zip Code: 28468
Registered Office Street Address: 211 CLUBHOUSE ROAD
County: BRUNSWICK City: SUNSET BEACH State: NC zipCode:28468
Signature of New Registered Agent
(signature consumes consent to the appointment)
Principal Office Telephone Number. 910 — 2 8 7 —110 0
Principal Office Wiling Address: 211 CLUBHOUSE ROAD
City. SUNSET BEACH State: NC zip Code: 28468
Principal Office Street Address. 211 CLUBHOUSE ROAD
City: SUNSET BEACH State: NC zip Code; 28468
Name, Titre, and Business Address of Principal Officers:
Name: DEBRA JOHNSON Title: SECRETARY
Address: 343 CROOKED GULLEY- CIRCLE
Cray: . SUNSET REACH state: NC zip: 28468
Name: DANA CONNELLY Tide: PRESIDENT
Address: 358-4 SEA TRAIL DR W
City: SUNSET BEACH State: NC zip: 28468
Name: Title:
Address:
City: eta_
Zip:
trerancaaon or annual report (Must be completed by
t Signature (Form must be signed by an a
DANA CONNELLY
Type or Print Name
Corporations).
JYq !o
radon) Date
PRESIDENT
Title

ZI
,5D.007 "c S3
r7 �c Z4.Co7 2
4. 33'/ 2t. 53�9
f�SS x2
5v7g 4
TYPICAL BUILDING PLAN
SCALE: 1 " = 20'
TC5 AAL 50�uA1ZG f&07A(!gG � 50-18.4 sF
Gav�2��
STORMWATER
D E C E I V E
- D
JUL 3 01999
PROJ # s� C�1 z ¢

HOUSTON and ASSOCIATES,'A
Consulting Engineers r
SHALLOT, NORTH CAROLINA 28459 J U L 3 0 1 V
Telephone [phone]
Facsimile [phone]
Ms. Linda Lewis, Environmental Engineer
Division of Environmental Management
North Carolina Department of Environment,
Health, and Natural Resources
127 Cardinal Drive Extension
Wilmington, North Carolina 28405
f Bia 117 Pine Street
L - --„Pos Office Box 627
Wednesday, July 14, 1999
Subject: Sea Trail Plantation
Village on Royal Post Road, Section 2
Sunset Beach, North Carolina
Resubmittal of Stormwater Plan for Approval
Project No.: SW8 960124
Dear Ms. Lewis:
Enclosed are two copies each of the revised Stormwater Plans in response
to your letter dated June 15, 1999, received on June 16, 1999. The following
are responses to respective comments:
The bottom elevation of the flow spreader is 29.75 ft. Added
bottom elevation to the stormwater plan on Sheet 2, the flow
spreader detail on Sheet 3, and the infiltration basin #2 detail on
Sheet 3.
2. A typical building footprint with dimensions has been provided.
Any wood deck or concrete areas are noted where appropriate.
3. The plans originally approved on July 19, 1996, are valid for the
Phase I basin only, as noted on Sheet 2. No modifications have
been made to Section 1 or the Infiltration Basin # 1.
4. No wetlands exist in this area. Added note to stormwater plan
on Sheet 2.
5. Infiltration basin shall be located in a recorded access/drainage
easement. Added note to stormwater plan on Sheets 2 and 3.
6. The drainage area delineation for each basin, including offsite
areas, has been provided on the attached sheet.
7. The storage volume of the infiltration basin was calculated using
the following information and formula:

Ms. Lewis Page Two Village on Royal Post Road Ph.2
July 14, 1999 Resubmittal of SW Plan
Existing Basin:
30.25' MSL:
30' MSL:
29' MSL.
28.50' MSL:
3370 SF
3189 SF
2530 SF
2222 SF
Storage Volume =[((3370+3189)/2)*0.25]+[((3189+2530)/2)*1.0]+
[((2530+2222)/2)*0.5) = 4,867 CF
8. The "Typical Curb Inlet Catch Basin" has been relabeled
"Overflow / Bypass Structure" on the stormwater plan and
details as shown on Sheets 2 and 3.
9. Spot elevations are shown in the grading and stormwater plan on
Sheet 2.
Should you have any comments or require any additional information,
please do not hesitate to contact our office at your convenience.
Sincerely,
3.E.
ociates, P.A.
JRH/ cuj
Enclosures
pc: Mr. Dean Walters, Sea Trail
File; 99-1045-4 (Sea Trail, Village on RPR, Sect 2, SW)

HOUSTON and ASSOCIATI
Consulting Engineers
SHALLOTTE, NORTH CAROLINA
Telephone [phone]
Facsimile [phone]
Ms. Linda Lewis, Environmental Engineer
Division of Environmental Management
North Carolina Department of Environment,
Health, and Natural Resources
127 Cardinal Drive Extension
Wilmington, North Carolina 28405
Subject: Sea Trail Plantation
Village on Royal Post Road
Sunset Beach, North Carolina
Modification of Stormwater Plan
Dear Ms. Lewis:
APR 14 1999
BY:
Monday,
117 Pine Street
Office Box 627
..J
gcpc;>/ 2J-HaD
On behalf of Sea Trail Corporation, we are pleased to submit for your
review and approval two copies each of the Stormwater Plans, the hydrologic
and hydraulic calculations and the executed Permit Application forms.
The proposed submittal is a modification to the existing permit SW8
960124 for the Village on Royal Post Road. The modification includes
development of Section 2 buildings with modifications to the Infiltration Basin
#2. No modifications have been made to Section 1 or the Infiltration Basin # 1.
Enclosed is a check in the amount of $4,0.00 to cover the required
modification application fee.
We appreciate your attention in this matter. Should you have any
comments or require any additional information, plcase do not hesitate to
contact our office at your convenience.
J4 TZ.'floiiston, P.E.
ton and Associates, P.A.
JR-1 /swq
Enclosures
pc: Mr. Dcan Walters, Sea f ail
File; 99-1045-4 (Sea Trail, Village on RPR, Sect 2, SW)

State of North Carolina
Department of Environment
and Natural Resources
Wilmington Regional Office f
James B. Hunt, Jr., Governor
Wayne McDevitt, Secretary
Division of Water Quality
June 15, 1999
Mr. Dean Walters, CEO
Sea Trail Corporation
211 Clubhouse Road
Sunset Beach, NC 28468
►'��. •
�r
v
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
Subject: ACKNOWLEDGEMENT OF RECEIPT AND
REQUEST FOR ADDITIONAL INFORMATION
Stormwater Project No. SW8 960124
Village on Royal Post Road, Sections 1 and 2
Brunswick County
Dear Mr. Walters:
The Wilmington Regional Office received a modification to the Stormwater Management Permit
Application for Village on Royal Post Road, Sections 1 and 2 on April 14, 1999. A preliminary review of
that information has determined that the application is not complete. The following information is needed
to continue the stormwater review:
1. Please add the bottom elevation of the flow spreader.
2. Please provide a typical building footprint with dimensions, and any wood deck or concrete
areas noted.
3. Since this is a modification, please add the Phase I infiltration basin information to the plans,
including sitc plan, drainage area, contours, location, details, etc., or indicate that the plans
originally approved on July 19, 1996, are valid for the Phase I basin only.
4. Please delineate all wetlands on site, or note on the plans that none exist.
5. Please locate the pond in a recorded access/drainage easement.
6. Please provide the drainage area delineation for each basin, including offsite areas.
7. Please indicate how you arrived at the storage volume provided in the basin by listing the
surface areas provided in the basin at elevations 28 and 30.25. Simply stating that 4,867 cubic
feet has been provided is not sufficient.
8. For clarity, please relabel the "Typical Curb Inlet Catch Basin" to the "Overflow / Bypass
Structure".
9. The typical road section indicates an inverted crown, but the catch basin/bypass structure is
located on the side of the street, rather than in the middle. How will runoff be directed into
the structure? Please show any special road grading requirements and details on the plans, or
provide a drop inlet in the middle of the road, directing runoff to the structure.
127 Cardinal Dr. Ext, Wilmington, North Carolina 28405 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/10% post -consumer paper

Mr. Walters
June 15, 1999
Stormwater Project No. SW8 960124
Please note that this request for additional information is in response to a preliminary review ---The
requested information should be received by this Office prior to July 15, 1999, or the application will be
returned as incomplete. The return of a project will necessitate resubmittal of all required items, including
the application fee. The Division is allowed 90 days from the receipt of a completed application to issue the
permit.
The construction of any impervious surfaces associated with this project prior to receipt of the
stormwater permit is considered a violation of NCGS 143-215.1, and is subject to enforcement action.
If you have any questions concerning this matter please feel free to call me at [phone]
Sincerely,
Ms. Linda Lewis
Environmental Engineer
RSS/arl: S:\WQS\STORMWAT\ADDINFO\960124.JUN
cc: Linda Lewis
Jay Houston, P.E.
127 Cardinal Dr. Ext., Wilmington, North Carolina 28405 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/10% post -consumer paper

Hydrologic and Hydraulic Calculations
for
Th@ W • e @ om Mo7&1 of MoM
1plmoC@ N
SEA TRAIL CORPORATION
BRUNSWICK COMM NORTH CAROLMA
Prepared By
momaq:om mmd p.�L
CONSULTING ENGINEERS
ShaIlotte, North Carolina
gm,a,,,,99a STORMWATER
p E C E I V E
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Royal Post Road, Ph 2
Storm Drainage Inverts
2/26/99
Prepared By: WQ .
Checked By:
Storm Drain
Length
Inv. In
Inv. Out
Grate Elev.
Culvert Diam.
I.D.
Feet
msl
at Inv. In
Inches
SD1
25
28.11
28.05
30.83
24
S132
110
28.39
28.11
31.70
18
SD3
140
28.74
28.39
32.10
18
S134
105
29.00
28.74
32.00
15
SD5
80
29.30
28.74
33.00
15

ISM
TER ELEVATION CALCULATIONS
Royal Post Road, Ph 2
Culvert Hydraulics
2/26/99
Prepared By: SWQ .
Checked By:
FLOWRATE =
9':9 CFS
MANNINGS n =
0.b 12'
HEADWATER ELEVATION ASSUMING INLET CON1
DIA. FOR CULVERT PIPE =
2 4 INCHES
DIA. FOR RISER =
0. INCHES
HEAD = 0.43
LENGTH OF CULVERT PIPE =
2 5 FEET
HEADWATER ELEVATION = 29.54
INV. IN ELEV. OF CULVERT =
2 8. 1 1 FEET
INV. OUT ELEV. OF CULVERT=
28.05 FEET
INLET COEF. FOR CULV. PIPE FLOW =
0.5
HEADWATER ELEVATION ASSUMING PIPE FLOW
INLET COEF. FOR CULVERT INLET CONTROL =
0,6
RISER WEIR ELEVATION =
0.00 FEET
HEAD = 0.27
WEIR FLOW COEF. =
0
HEADWATER ELEVATION = 30.27
TAILWATER ELEVATION =
30.00 FEET
VELOCITY=
3.15 FPS
TAILWATER UNKNOWN = ZERO (0)
HEADWATER ELEVATION ASSUMING WEIR FLOW
HEAD = #DIV/01
HEADWATER ELEVATION = #DIV/01
ISD2
(HEADWATER ELEVATION CALCULATIONS
FLOWRATE =
9 CFS
MANNINGS n =
0.012
HEADWATER ELEVATION ASSUMING INLET CONTROL
DIA. FOR CULVERT PIPE =
18 INCHES
DIA. FOR RISER =
0 INCHES
HEAD = 1.12
LENGTH OF CULVERT PIPE =
11 0 FEET
HEADWATER ELEVATION = 30.26
INV. IN ELEV. OF CULVERT =
2839 FEET
INV. OUT ELEV. OF CULVERT =
28.1 1 FEET
INLET COEF. FOR CULV. PIPE FLOW =
0.5
HEADWATER ELEVATION ASSUMING PIPE FLOW
INLET COEF. FOR CULVERT INLET CONTROL =
0.6
RISER WEIR ELEVATION =
0.00 FEET
HEAD = 1.29
WEIR FLOW COEF. =
0
HEADWATER ELEVATION = 31..56
TAILWATER ELEVATION =
30.27 FEET
VELOCITY=
5.09 FPS
TAILWATER UNKNOWN = ZERO (0)
HEADWATER ELEVATION ASSUMING WEIR FLOW
=ZhKQ 1,5t1 K15hK UTA. HEAD = #DIV/Ol
HEADWATER ELEVATION = #DIV/01

ISM
TER ELEVATION CALCULATIONS
Royal Post Road, Ph 2
Culvert Hydraulics
2/26/99
Prepared By: SWO .
Checked By:
FLOWRATE=
7.02 CFS
MANNINGS n =
0.012
HEADWATER ELEVATION ASSUMING INLET CON7
DIA. FOR CULVERT PIPE =
18 BVC�iES
DIA FOR RISER =
0 INCHES
HEAD = 0.68
LENGTH OF CULVERT PIPE =
14 0 FEET
HEADWATER ELEVATION = 30.17
INV. IN ELEV. OF CULVERT =
28.74 FEET
INV. OUT ELEV. OF CULVERT=
28.39 FEET
INLET COEF. FOR CULV. PIPE FLOW =
0.5
HEADWATER ELEVATION ASSUMING PIPE FLOW
INLET COEF. FOR CULVERT INLET CONTROL =
0. 6;
RISER WEIR ELEVATION =
0. 00 FEET
HEAD = 0.90
WEIR FLOW COEF. =
0
HEADWATER ELEVATION = 32.47
TAILWATER ELEVATION =
31.56 FEET
VELOCITY=
3.97 R'S
TAILWATER UNKNOWN = ZERO (0)
HEADWATER ELEVATION ASSUMING WEIR FLOW
SD4
HEADWATER ELEVATION CALCULATIONS
FLOWRATE=
3.97 CPS
MANNINGS n =
0.012
DIA. FOR CULVERT PIPE =
1 5 INCHES
DIA. FOR RISER =
0 INCHES
LENGTH OF CULVERT PIPE =
105 FEET
INV. IN ELEV. OF CULVERT =
29.00 FEET
INV. OUT ELEV. OF CULVERT =
26.74.
INLET COEF. FOR CULV. PIPE FLOW =
0.5
INLET COEF. FOR CULVERT INLET CONTROL = <.._ . 0.6
RISER WEIR ELEVATION=
0.00 FEET
WEIR FLOW COEF. = s
'' 0
TAILWATER ELEVATION =
32.47 FEET
VELOCITY=
3.24 FPS
HEAD = #DIV/01
HEADWATER ELEVATION = #DIV/01
HEADWATER ELEVATION ASSUMING INLET CONTROL
HEAD = 0.45
HEADWATER ELEVATION = 30.08
HEADWATER ELEVATION ASSUMING PIPE FLOW
HEAD = 0.58
HEADWATER ELEVATION = 33.05
HEADWATER ELEVATION ASSUMING WEIR FLOW
HEAD = #DIV/0!
HEADWATER ELEVATION= #DIV/01

Royal Post Road, Ph 2
Culvert Hydraulics
2/26/99
Prepared By: SWO .
Checked By:
SD5
HEADWATER ELEVATION CALCULATIONS
FLOWRATE =
0.86 CFS
MANNINGS n =
0.012
HEADWATER ELEVATION ASSUMING INLET CONTRO
DIA. FOR CULVERT PIPE =
15 INCHES
DIA. FOR RISER =
0 INCHES
HEAD = 0.02
LENGTH OF CULVERT PIPE =
80 FEET
HEADWATER ELEVATION = 29.95
INV. IN ELEV. OF CULVERT=
29.30 FEET
INV. OUT ELEV. OF CULVERT =
28.74 FEET
INLET COEF. FOR CULV. PIPE FLOW =
.. Q , 5
HEADWATER ELEVATION ASSUMING PIPE FLOW
INLET COEF. FOR CULVERT INLET CONTROL =
06
RISER WEIR ELEVATION =
0.0& FEET
HEAD = 0.02
WEIR FLOW COEF. =
0
HEADWATER ELEVATION = 32.49
TAILWATER ELEVATION =
32.47 FEET
VELOCITY=
0.70 FPS
TAILWATER UNKNOWN = ZERO (0)
HEADWATER ELEVATION ASSUMING WEIR FLOW
HEAD = #DIV/01
HEADWATER ELEVATION #DIV/0!

Royal Post Road, Ph 2
Stormwater Calculations
2/26/99
Infiltration Basin
Drainage Area:
Impervious Area:
Buildings:
Roadway:
Sidewalk:
Total:
% Impervious:
Runoff:
"Simple Method"
Rv
Volume from Runoff:
2.15 Acres
0.476 Acres
0.731 Acres
.161 Acres
1.368 Acres
63.63 %
1 Inches
0.62
4859 CF
Existing Basin:
30.25'
MSL:
3370 SF
30'
MSL:
3189 SF
29'
MSL:
2530 SF
28.5'
MSL:
2222 SF
Volume Provided:
4867.375 CF
Drawdowm Calculations, Assuming Full Basin
Average Surface Area:
Storage Provided:
Permeability:
Drawdown Time:
2796 SF
4867 CF
5 Inches/Hour
28.18 Hours