SW8951210_HISTORICAL FILE_19960823 (3)

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW8 "I S 12 1
DOC TYPE
❑ CURRENT PERMIT
❑ PPROVED PLANS
HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
Iggb 0$ 23
YYYYMMDD

Sta'te'of North Carolina
Department of Environment, , 791
Health and Natural Resources
Division of Water Quality
IL
James B. Hunt, Jr., Governor p E H N F�
Jonathan B. Howes, Secretary
A. Preston Howard, Jr., P.E., Director
August 23, 1996
Mr. S. Keith Cooper, Agent
Landfall Associates
Post Office Box 5368
Wilmington, North Carolina 28403
Subject: Permit No. SW8 951210
Upper Pond at Horseshoe Lake
High Density Subdivision Stormwater Project
New Hanover County
Dear Mr. Cooper:
The Wilmington Regional Office received the Stormwater Management Permit Application for the Upper Pond at
Horseshoe Lake on December 8, 1995, with final information on August 20, 1996. 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 951210, dated August 23, 1996, for the construction of the
Upper Pond at Horseshoe Lake.
This permit shall be effective from the date of issuance until August 23, 2006, 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
ajudicatory 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,
[� l' C L,-- S l-,1' \J i r--
F0 Dave Adkins
Regional Water Quality Supervisor
DA/arl: S:\WQS\STORMWAT\PERMIT\951210.AUG
cc: Richard Dickie, P.E.
Tony Roberts, New Hanover County Inspections
Beth Easley, New Hanover County Engineering
Linda Lewis
twil_mingion R_egionel-Office
Central Files
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer

State Stormwater Management Systems '
Permit No. SW8 951210
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT, HEALTH 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
PERNIISSION IS HEREBY GRANTED TO
Landfall Associates
Upper Pond at Horseshoe Lake
New Hanover County
FOR THE
construction, operation and maintenance of a Detention Pond in compliance with the provisions of 15A NCAC
2H .1000 (hereafter referred to as the "stormwater rules') and the approved stormwater management plans and
specifications and other supporting data as attached and on file with and approved by the Division of Water
Quality and considered a part of this permit.
This permit shall be effective from the date of issuance until August 23, 2006 and shall be subject to the
following specified conditions and limitations:
I. DESIGN STANDARDS
1. This permit is effective only with respect to the nature and volume of stormwater described in the
application and other supporting data.
2. This stormwater system has been approved for the management of stormwater runoff as described on
page 3 of this permit, the Project Data Sheet. The subdivision is permitted for Lots 40R and 43R @50 %
impervious; Lots 41R, 42R, 70, and 71 @35% impervious.
3. Approved plans and specifications for this project are incorporated by reference and are enforceable
parts of the permit.
2

DIVISION OF WATER QUALITY
PROJECT DATA SHEET
Project Name:
Permit Number:
Location:
Applicant:
Mailing Address:
Application Date:
Water Body Receiving Stormwater Runoff:
Classification of Water Body:
Pond Depth:
Permanent Pool Elevation:
State Stormwater Management Systems
Permit No. SW8 951210
Upper Pond at Horseshoe Lake
951210
New Hanover County
Mr. S. Keith Cooper, Agent
Landfall Associates
Post Office Box 5368
Wilmington, North Carolina 28403
December 8, 1995
Horseshoe Lake
"SC"
5 feet
5 MSL
Total Impervious Surfaces Allowed: 4,003,164 square feet
Lots 40R and 43R @50%; Lots 41R, 42R, 70, and 71 @35%
Multifamily Area @85%
Future single family lots @35 %
Roads @353,707 square feet
Offsite Area entering Pond:
N/A square feet
Green Area entering Pond:
6,692,559 square feet
Required Surface Area:
282,973 square feet
Provided Surface Area:
476,118 square feet
Required Storage Volume:
344,803 cubic feet (518,299 cf for 1.5")
Provided Storage Volume:
Temporary Storage Elevation:
Controlling Orifice:
521,324 cubic feet
6 MSL
7 x 4" pipe
3

State Stormwater Management Systems
Permit No. SW8 951210
4. No homeowner/lot owner/developer shall fill in, alter, or pipe any drainage feature (such as swales)
shown on the approved plans as part of the stormwater management system without submitting a
revision to the permit and receiving approval from the Division.
5. The permittee is responsible for verifying that the proposed built -upon area does not exceed the
allowable built -upon area. Once the lot transfer is complete, the built -upon area may not be revised
without approval from the permittee, and responsibility for meeting the built -upon area limit is
transferred to the individual property owner.
6. The following items will require a modification to the permit:
a. Any revision to the approved plans, regardless of size.
b. Project name change.
C. Transfer of ownership.
d. Redesign or addition to the approved amount of built -upon area.
e. Further subdivision of the project area.
f. Filling in, altering, or piping of any vegetative conveyance shown on the approved plan.
In addition, the Director may determine that other revisions to the project should require a modification
to the permit.
7. The Director may notify the permittee when the permitted site does not meet one or more of the
minimum requirements of the permit. Within the time frame specified in the notice, the permittee shall
submit a written time schedule to the Director for modifying the site to meet minimum requirements.
The permittee shall provide copies of revised plans and certification in writing to the Director that the
changes have been made.
IL SCHEDULE OF COMPLIANCE
1. The permittee will comply with the following schedule for construction and maintenance of the
stormwater management system:
a. The stormwater management system shall be constructed in it's entirety, vegetated and
operational for it's intended use prior to the construction of any built -upon surface except roads.
b. During construction, erosion shall be kept to a minimum and any eroded areas of the system will
be repaired immediately.
2. The permittee grants permission to DEHNR Staff to enter the property for the purposes of inspecting
the project for compliance with the conditions of this permit.
4

State Stormwater Management Systems
Permit No. SW8 951210
3. The permittee shall at all times provide the operation and maintenance necessary to assure the permitted
stormwater system functions at optimum efficiency. The approved Operation and Maintenance Plan must
be followed in it's 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.
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. Prior to the sale of any lot, deed restrictions must be recorded which limit the built -upon area per lot
to the amount as shown on the Project Data Sheet, per Part I #2. The recorded statements must follow
the form:
a. "The maximum built -upon area per lot is 35 % of the lot area above mean high water, inclusive
of that portion of the right-of-way between the lot line and the edge of pavement, structures,
pavement, walkways of brick, stone, or slate, but not including open wood decking. Lots 40R
and 43R are limited to 50 % impervious. The Multi -family area is limited to a maximum of 85 %
impervious."
b. "The covenants pertaining to stormwater regulations may not be changed or deleted without
concurrence of the State."
C. "Alteration of the drainage as shown on the approved plan may not take place without the
concurrence of the State."
d. "Lots within CAMA's Area of Environmental Concern may be subject to a reduction in their
allowable built -upon area due to CAMA regulations."
e. "Roof drain gutters are required on all homes and must drain into the street."
f. "Two-thirds of the lot must be graded toward the street."
g. "Perimeter swales and ditches must pick up the runoff and direct it into the pond."
6. This permit shall become voidable unless the facilities are constructed in accordance with the conditions
of this permit, the approved plans and specifications, and other supporting data.
5

State Stormwater Management Systems '.
Permit No. SW8 951210
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. A copy of the recorded deed restrictions must be submitted to the Division within 30 days of the date
of the recording. The recorded copy must be signed by the permittee, dated, stamped with the deed
book number and page, and bear the stamp of the Register of Deeds.
9. 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.
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 form must be submitted to the Division
of Water Quality accompanied by an application fee, documentation from the parties involved, and other
supporting materials as may be appropriate. The approval of this request will be considered on its
merits and may or may not be approved.
2. Failure to abide by the conditions and limitations contained in this permit may subject the Permittee to
enforcement action by the Division of Water Quality, in accordance with North Carolina General Statute
143-215.6(a) to 143-215.6(c).
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 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 23rd day of August, 1996.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
r-2- I' C L/_ S f-, f, \ i r t---
t Q i A. Preston Howard, Jr., P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission
Permit Number SW8 951210
6

J."'Tiaid
August 16, 1996
Ms. Linda Lewis
N.C. Department of Environment,
Health and Natural Resources
Division of Water Quality
127 Cardinal Drive Extension
Wilmington, NC 28405-3845
Re: Upper Pond at Horseshoe Lake
Stormwater Project No. SW8 951210
Dear Ms. Lewis:
As you requested, we have completed and enclosed the Pond
Maintenance Requirements form. Please do not hesitate to
contact me or Richard Dickie (919-361-5000) if you have
additional questions.
Sincerely,
S. Keith ooper
Director of Land Development
SKC:sc
enclosure
CC: Richard Dickie (w/copy)
D E C E I V E
AUG 2 01996 D
PROJ N & Z O
LANDFALL ASSOCIATES • P.O. BOX 5368, HANOVER CENTER STATION • WILMINGTON, NORTH CAROLINA 28403 • 919-256-6111

THE JOHN R. McADAMS COMPANY, 41AUG 01 1gg6 J
CONSULTING ENGINEERS
POST OFFICE BOX 14005
RESEARCH TRIANGLE PARK, NORTH CAROLINA 27709
[phone] FAX [phone]
July 31, 1996
Ms. Linda Lewis
NC Department of Environment, Health,
and Natural Resources
Division of Water Quality
Water Quality Section
127 Cardinal Drive Extension
Wilmington, North Carolina 28405-3845
Re: New Horseshoe Lake
LFA-94020
Stormwater Project No. SW8951210
Dear Ms. Lewis:
D E C E I V E
AUG 011996
D E
PROJ #
"this letter should complete our discussions on your last review comments from
your letter of June 26, 1996.
When I spoke with you during the week of July 8, we resolved comments 1, 3,
and 4 from your letter. Regarding comment #3,1 stated that only a portion (35.95
acres) of the lots in Blocks 29, 36 and 37 are inside the pond drainage area. You
asked that we identify those lots individually. I spoke with Keith Cooper of
Landfall Associates, and we agreed that it would be simpler to apply the 35%
impervious surface area limitation to all the lots in Blocks 29, 36 and 37. As we
showed in the Exhibit "A" from my last response, this is a level that most
unrestricted lots are below.
Your comment #5 addressed the new regulation that requires forebays. We
agreed that the forebays could be located in the future when adjacent development
would tie down the pond inlet points. However, I stated my concern that the
pond's original purpose was for wetland restoration and mitigation, and I was not
sure that we could install forebays without violating conditions of the wetland
permit with the Corps of Engineer.

THE JOHN R. McADAMS COMPANY, INC.
Ms. Linda Lewis
July 31, 1996
Page Two
I spoke with the designer of the wetland shelf areas, Larry Zucchino, who in turn
spoke with Dave Atkins in your office. I will summarize the main points of their
discussion below:
Of the three main drainage courses into the pond area, two of them
enter at existing depressed wetland areas. Since these areas are below
the proposed vegetated shelves, they will act as forebays.
A third main drainage course runs to an area with a long vegetated
shelf with several small existing wetland pockets.
The entire perimeter of the pond is surrounded by either new shelves
sloped at 10:1 or 8:1 and planted with wetland vegetation, or by
existing pockets of wetlands that are generally depressed below the
adjacent shelves.
The unique nature of this pond allows for some leeway in the
interpretation of the new stormwater regulations. The filtering action
of this perimeter vegetation acts to accomplish much of the same
function of the forebays.
When design for future development occurs, inlet points can be
considered on a case -by -case basis to determine if forebays are
required and if they can be designed in such a way that their
installation will not disrupt the wetland plantings.
I hope that this clears the way for you to issue the water quality permit for this
pond. Keith Cooper will provide you with the signed Operation and Maintenance
Plan. Please call me if you need anything else or need to discuss any of this.
Sincerely,
TILE JOHN R. McADAMS COMPANY, INC.
?,,i J- b-ckce.
Richard J. Dickie, PE
Project Manager
RJ D/dcg
cc: Keith Cooper, Landfall Associates
Larry Zucchino, Paton-Zucchino & Associates
Dave Atkins, NC DEHNR - Division of Water Quality

0
State of North Carolina
Department of Environment, Health, and Natural
Wilmington Regional Office
James B. Hunt, Jr. DIVISION OF ENVIRONMENTAL. MANAGEMENT
Governor WATER QUALITY SECTION
June 26, 1996
Mr. Richard Dickie, P.E.
The John R. McAdams Co.
Post Office Box 14005
Research Triangle, North Carolina 27709
Resources
Jonathan B. Howes
Secretary
Subject: ADDITIONAL INFORMATION
Stormwater Project No. SW8 951210
Horseshoe Lake Subdivision
New Hanover County
Dear Mr. Dickie:
The Wilmington Regional Office received a Stormwater Management Permit Application for
Horseshoe Lake Subdivision on June 10, 1996. 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. What has changed since the last set of calculations that would increase the surface area at
the permanent pool by 21,363 square feet? Was the first set of calculations submitted
1_ incorrect?
2. A signed Operation and Maintenance Plan has not been received to date.
3. The marked up II" x 17" drainage area map you provided does not include the lots in
Blocks 29, 36 and 37, which are now included in the 260 acre drainage area. The map
indicates this as "Future Lots", but they are not included inside the red drainage area line.
The cover letter indicates that only 35.95 acres are in the drainage area. Does the drainage
area map need to be revised? Only those unsold lots that drain to the pond need to be
restricted. The sold lots that are in the pond's drainage area need to have their built -upon
area estimated and included in the calculations. I have enclosed your original map with the
blocks in question highlighted. I am becoming more confused with each submittal of
additional information, when the opposite should be true.
.w 4. Does the 8.12 acres of street cover both the existing and proposed streets? I cannot find a
breakdown by name of the -greets that are included in the 8.12 acres.
127 Cardinal Drive Extension, Wilmington, N.C. 28405-3845 • Telephone 9I0-395-3900 • Fax [phone]
An Equal Opportunity Affirmative Action Employer

Mr. Dickie
June 26, 1996
Stormwater Project No. SW8 951210
5. Both 6:1 vegetated shelf areas and forebays are required for all ponds permitted after
September 1, 1995. Shelf areas provide habitat for plant species that provide nutrient
uptake, while forebays provide an area for settling out solids. If inlets are added later as
this drainage area develops, a potential nuisance condition of having to work in the pond
to construct a forebay is created. Forebays will be required, regardless of when the inlets
are constructed. Arguments that the pond is stable and additional work in the pond to
construct the forebays will cause problems cannot be considered. You must ,solve this
problem now. That solution will become a permit condition.
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 26, 1996, or the application will be
returned as incomplete. The return of a project will necessitate resubmittal of all required items, including
the application fee.
If you have any questions concerning this matter please feel free to call me at [phone].
Sincerely,
X
1Is. Linda Lewis
Environmental Engineer
DA/arl: S:\WQS\STORMWAT\ADDINFO\951210.JUN
cc: Linda Lewis
Central Files

a
THE JOHN R. McADAMS COMPANY, INC.
CONSULTING ENGINEERS
POST OFFICE BOX 14005
RESEARCH TRIANGLE PARK, NORTH CAROLINA 27709
[phone] FAX [phone]
UPPER POND AT
HORSESHOE LAKE
WATER QUALITY CALCULATIONS
LFA - 94020
Calculated By:
Checked By:
D.A. Clark
R.J. Dickie
September 15, 1995
Revised: June 7, 1995
STORE N T U
D E C E I V E D
JUN 1 01996 D
PROJ# D 5/Zlo
eseoeacnetrr
SEAL
15391
4V4

THE JOHN R. McADAMS COMPANY, INC.
P.O. Box 14005
Research Triangle Park, North Carolina 27709
��� [phone] Fax [phone]
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THE JOHN R. McADAMS COMPANY, INC.
P.O. Box 14005 p�/ /G/
Research Triangle Park, North Carolina 27709 tJC,r'4('1' l
[phone] Fax [phone]
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THE JOHN R. McADAMS COMPANY, INC.
P.O. Box 14005
Research Triangle Park, North Carolina 27709
[phone] Fax [phone]
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THE JOHN R. McADAMS COMPANY, INC.
P.O. Box 14005
�� Research Triangle Park, North Carolina 27709
LLL��� � [phone] Fax [phone]
• PAGE OF
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85% TSS RENSOVAL,
30 FOOT VEGETATED FII.TER REQLI ED
4.0'
4.5'
5.0'
S.5'
6.0'
6.5'
7.0'
7.5'
FDEP7H3'3.5'
.8
I .7
.6
I .5
0
I O
0 10
0
20%
1.7
1.3
1.2
11.1
11.0
.9
.8
I .7 I .6
.5
30 %
2.5
2.2
1.9
1.8
1.6
1.5
11.3
11.2 11.0
.9
40 %
3.4
3.0
2.6
2.4
12.1
1.9
11.6
11.4 11.1
11.0
50 %
4.2 13.7
3.3 13.0
2.7
2.4 12.1
11.8
1.5
11.3
60 %
5.0
4.5
3.8 13.5
13.2
2.9
2.6 12.3
12.0 11.6
70 %
6.0
5.2 14.5
14.1
13.7
1
3.7 12.9
2.5 12.1 11.8
80 %
6.8
6.0 15.2
14.7
4.2
3.7
3.2 12.7
12.2 12.0
90 %
7.5
6.5 15.8
5.3 14.8
4.3
3.8 13.3
12.8
11.3
�I
100 % 18.2 17.4
16.8
16.2 15.6
5.0 4.4 13.8
3.2 12.6 �I
90% TSS REMOVAL
NO VEGETATED FILTER REQUIRED
DEPTH
I 3'
3.5'
4.0'
4.5'
S.0'
S.5'
6.0'
6.5'
7.0'
i
7.5' I
IIviP o
10%
1.3
11.0
.8
I .7
I .6
.5
I .4
I .3 .2
I .1
20 %
2.4
2.0
11.8
1.7
11.5
11.4
11.2
11.0
.9 .6 j
3070
3.5
13.0
2.7
12.5
12.2
11.9
11.6
11.3
1.1
.8
u1 %
4.5
14.0
13.5
3.1
12.8
2.5
12.1
11.8
1.4
1.1 .
50 %
5.6 15.0
4.3
3.9 13.5
3.1
2.7 12.3
1.9 11.5
60 %
7.0
6.0
5.3
1 4.8 44.3
3.9 13.4
12.9
12.4 11.9
70 %
8.1
7.0
6.0 15.5
t
5.0
4.5 13.9
13.4
f 2.9 12.3
80 % 19.4
8.0
7.0 16.4
15.7
15.2
14.6
14.0
13.4
2.8
9070
10.7
9.0
7.9
7.2 16.5
15.9
5.2 14.6
13.9 13.3
100 % 112.0
110.0 18.8 18.1
17.3 16.6
15.8
15.1
14.3
13.6

M
Sheetl
Water Quality Pond Design Sheet
Project Name: Upper Pond at Horseshoe Lake
Operator: D.A. Clark
Job Number: LFA-94020
Date: 6/4/96
Contour
(feet)
Stage
(feet)
Contour
Area
(SF)
Average
Contour
Area
(SF)
Incremental
Contour
Volume
(CF)
Accumulated
Contour
Volume
(CF)
3.5
0.0
299250
4.0
0.5
368546
333898
166949
166949
5.0
1.5
476118
422332
422332
589281
6.0
2.5
566530
521324
521324
1110605
7.0
3.5
615043
590787
590787
1701392
8.0
4.5
634440
624742
624742
2326133
9.0
5.5
653837
644139
644139
2970272
10.0
6.5
673235
663536
663536
3633808
Ks= 375084
b = 1.2072
Page 1

Sheet1
Calculation of Runoff Volume required for storage
The runoff to the pond for the 1.5 storm detention requirement is calculated using the SCS curve
number method. Impervious areas that directly enter the pond are counted as Directly Connected
Impervious Areas (DCIAs). No infiltration calculation will be provided for these areas. Areas
not directly connected will be accounted for in a composite curve number.
From SCS Soils Survey map, predominant hydrologic soil type = D
Using basic SCS runoff methodology, with no adjustments made
to initial abstractions (0.2`S and 0.8'S).
Impervious Area, directly connected (DCIA) = 92.00 acres
@CN= 98
Other areas draining to pond (not DCIA) = 168.00 acres
@CN= 58
Runoff from DCIAs =_>
Precipitation amount = 1.5 inches
S = 0.204 inches (calculated)
Q. = 1.280 inches (calculated)
Runoff volume = 427516 CF
Runoff from non -connected areas =_>
Precipitation amount = 1.5 inches
S = 7.241 inches (calculated)
Q. = 0.000 inches (calculated)
Runoff volume = 224 CF
Therefore, total runoff from precipitation in question = 427740 CF
This amount of runoff must be stored in the pond above normal pool elevation,
and be released in a period of two (2) to five (5) days, by an inverted PVC
siphon, the invert end of which is set at permanent pool elevation.
Page 2

Sheetl
Z
Calculation of
uired for runoff
Normal pool depth (above invert) =
Storage provided at permanent pool depth =
Total storage required for normal + storage pool =
Stage (above invert) associated with this storage =
3ool (above normal pool)
ulve*X IN
1.50 feet bt- 3.5 _
Sly
611936 CF (calculated)
1039676 CF
2.33 feet
Therefore, depth required above normal pool for storm storage = 0.83 feet
9.92 inches
Therefore set crest of principal spillway at stage = 2,50 feet
and EL = 6.00 feet
S taSE Bd�
AIL Uf+lT of
Sragov.E tiuJ,
At principal spillway crest, storm pool storage provided 521826 CF
/ I
�(otlan. SToe�� YRa I oe�
Yr;RM • Pam C'l-�//�Ttar..l. C�-tom- R�t�)
I
i
Page 3

THE JOHN R. McADAMS COMPANY, INC.
LP.O. Box 14005
Research Triangle Park, North Carolina 27709
��� [phone] Fax [phone]
1 r Qom( PAGE � OF
J R MCA JOB NO. �+"� I"E�7�% DATE g aS BY DA-1 CHECKED BY
(Date)
CLIENT PROJECT
SUBJECT INVEV"Et S(PRCrJ DESI&J
%: I 61MOTUP ..a
It-vCEp-� SIPIAI sh-se-o pri pouAwloc- PUA-X)C" Fd-
opipNce %Lov" (mmi coM I' ajD"o-d5 aF u2P> simmwAn7- OES16h� ..
- TOe- ewBm oe4vicc c
fVk
k*hCA4 Gw .BG ks
Z D IIfL Gb = O.roO
Q= 0,0431 CDp ��- /Z4 J b= SIPHrnJ 01k, 11"]
(,� = SI PVCyrJ Fi ovJ L CFS]
•TF QP&P-1ING /,1DT Su6MEef,'D, 6V41V G6 j,=VUA;ILAJ qxr� r APPLl
lY� TNT FVW,G�.>ING
Q 3�Z Cob (��'fL t SAuuE VNt•tri AS ALkNJE-�
• 4awosFeci 'DIS1Gn iD V-� CAta w0tj6 B� FALUN6 HEAD .
STeP5 Vbg- FAu+w Hen) aPdZtu,A-rtaJ
Smac
J- i2 AvG 6( ->�E)
SRkroE
J QAV& -----1
/� Qw&(#-, M) �flc,. VpL(N-t N�

THE JOHN R. MCADAMS COMPANY, INC.
P.O. Box 14005
Research Triangle Park, North Carolina 27709 1I
��� [phone] Fax [phone] IIS'G)S PAGE _I-.l.L_ OF
J R McA JOB NO. 11R' --I40W DATE 910 _ 1S BY LAt— CHECKED BY
(Date)
CLIENT PROJECT .
SUBJECT
• CA1tu aDC;rJ o'F 11IME p-M0I9-M
N Iof-IL. VGI.
DIZ/b oolel�l.1 TIME -
i.I Qnv4, I
pok&RMA OF 51,jST A
2- Z4"O Bnaeah
I
I
OVMIF1,� wt-1e tZ, to,o
I V EUo.o
II �� Pocr. �521 LJZiOt�>
INVI�T�A PIG StPltv.i �5 )
i
vse (0- 4"C WC InuElzqEb SIPR>js AT
1Nv. Dor EL= 5.0 ) Fp2. DZ.AWDWAJ -[INtG
OF 4.1 DAIS
AUl/aTm� s r� �>;a cAa ems. Ago �I-�cUl�b
GUMPF�P-1Son� 01

John R. McAdams Company, Inc.
Page 1
Inverted Siphon Design Sheet
D siphon =
4 inches
No. siphons =
6
Ks =
375084
b =
1.2072
Cd siphon =
0.60
Siphon Invert =
5.00 feet
Volume @ Normal Pool =
611936 CIF
WSEL
(feet)
Vol. Stored
(cf)
Siphon Flow
(cfs)
Avg. Flow
(cfs)
Incr. Vol.
(cf)
Incr. Time
(sec)
6.000
521826
2.298
5.850
440224
2.081
2.189
81602
37273
5.700
359695
1.838
1.959
80529
41097
5.550
280296
1.558
1.698
79399
46751
5.400
202093
1.216
1.387
78203
56376
5.250
125160
0.670
0.943
76933
81606
5.150
74619
0.311
0.490
50541
103061
Drawdown Time = 4.24 days
By comparison, if calculated by the average head over the orifice (assuming
average head is half the total depth), the result would be:
Average driving head on orifice =
0.333 feet
Orifice composite loss coefficient =
0.600
X-Sectional area of 6 - 4" inverted siphons =
0.524 ft2
Q = 1.4560 cfs
Drawdown Time = Volume / Flowrate / 86400 (sec/day)
Drawdown Time = 4.15 days
Conclusion : Use 6 - 4" Diameter PVC Inverted Siphons to drawdown the accumulated
volume from the 1.5 " storm runoff, with a required time of about 4 days.
SIPHONS.XLS

M
EXHIBIT'A'
PEMBROKE JONES PARK
NEW HORSESHOE LAKE (LFA-94020)
TYPICAL AS -BUILT CONDITIONS WITHIN DRAINAGE AREA
JUNE 5, 1996
SUMMARY OF IMPERVIOUS SURFACE AREAS FOR
11 LOTS IN UNRESTRICTED AREA
LOT 'IMPERVIOUS
j
LOT/BLK
AREA (SF) AREA (SF)
% IMPERVIOUS
29/2.
20,422 4,110
20.13%
11/2
23,660 10,978
46.40%
18/2
20,000 3,343
16.72%
26/2
21,584 6,948
32.19%
24/2
20,140 5,110
25.37%
28/2
23,172 6,594
28.46%
32/2
20,033 5,574
27.82%
31R/4
33,136 11.190
33.77%
1/4
22,626 6,074
26.85%
3/4
20,245 5,926
29.27%
40/4
23,236 7,485
32.21 %
TOTALS
248,254 73,332
AVERAGES
22,569 6.667
29.54%
HIGH
46.40%
LOW
16.72%
'INCLUDES DRIVEWAY PAVEMENT INSIDE RIGHT-OF-WAY

THE JOHN R. McADAMS COMPANY INC.
Ms. Linda Lewis
June 7, 1996
Page Two
The plat recorded in Map Book 32, Page 94 (shown as Phase Seven")
includes Blocks 29, 36 and 37. All 12 lots in Block 29, all 43 lots in
Block 36 (plus the 3.13 acre Landfall Associates tract) and all 4 lots in
Block 37 can be restricted to the 35% limit. However, only 35.95 acres of
the total lot area (42.79 acres) are in the Horseshoe Lake drainage
boundary. i
These lots can be listed on Attachment "A" as restricted to 35%
impervious surface area.
2. I have provided a revised pond grading plan that shows the pond bottom
contour elevations. I am also including copies of the wetland mitigation
plan developed by Paton-Zucchino and Associates, PA. This pond was
developed in coordination with the Corps of Engineers as a wetland
mitigation project. I
The two attached exhibits show the lake overall grading scheme (sheet 3
of 16-S3) and cross -sections, both typical and specific (sheet 8 of 16-S8).
As you can see, the wetland mitigation plan provides shelf areas at 10:1
slopes with wetland vegetation plantings. It is our opinion that these new
(and existing) wetland areas will provide the same functions as the
forebays. As we discussed, no specific development plans have been
conceived for the project area immediately surrounding the lake, so no
specific inlet points are known at this time.
We will provide a signed Operation and Maintenance Plan.
The new grading plan (and the wetland mitigation plans) make the pool
areas more apparent. The bottom elevation is variable, ranging from -3.0
to -1.0 MSL. Normal pool elevation is +5.0 MSL and is shown by the
dotted contour line. The contour intervals shown are 0.5' and 1.0,'
intervals. The drawing scale makes reading them somewhat challenging.
We have used CADD programs to determine the areas used to develop the
stage -storage relationship for the volume calculations.
It is acknowledged that plans will be submitted at a later time. Oui
submittal at this time is intended to define the impervious surface area
limits for the future project area development.

I
I
�.a
TIC JOHN R. McADAMS COMPANY INC.
i
Ms. Linda Lewis '
June 7, 1996 I
Page Three
I
6. We have used a modified SCS method that separates impervious areas that
drain directly to the pond by pavement or pipe. The runoff from these
areas (DCIA - Directly Connected Impervious Areas) is computed with a
CN=98. Impervious areas that drain through upland ponds or conservation
areas are weighted with the adjacent land uses. See page 2 "Calculation of
Runoff Volume Required for Storage" in the calculations. I believe these
results will compare favorably with the Schuler method.
7. Because of the pond depth versus surface area, we qualify for 90% TSS
removal without a vegetative filter. I would like to point out that our
outflow is flowing into a second existing pond immediately downstream.
The existing pond performs two functions:
I
-Acts as a stilling basin, since the outlet pipes are set at the existing
pond normal pool elevation (+/-); this eliminates the need
for a rip rap apron.
-Acts as a secondary treatment area, more so than;a 30' vegetated
swale would.
I want to point out that the calculations we are presenting include several
conservative assumptions. The existing unrestricted lots are presented at 50%
impervious surface area in our calculations. However, a sampling of as -built
surveys of l l lots in the area immediately adjacent to the project area shows an
average impervious coverage of under 30% (29.54%). See the enclosed Exhibit
"A" which is included in the calculations and is also presented as a separate
attachment with a map showing the sampled lots.
Another conservative assumption used in our calculations /�nvolves the idea of
directly connected impervious areas. We treat all roofs,, driveway, patios and
walks in these areas as being directly piped to the pond./ In reality, they will
mostly sheet flow over lawn areas before flowing into the (street, where the runoff
becomes directly connected by pavement and pipes.
The pond we are presenting here is designed to meet or exceed the standard DEM
wet detention standards for water quality. The wetland mitigation design that has
been developed separately will provide an additonal bonus in water quality.

THE JOHN R. WADAMS COMPANY, INC.
Ms. Linda Lewis
.June 7, 1996
Page Four
I believe that we have presented you with a package of plans and calculations that
you can easily approve. Please call me if you have any questions or need
anything else.
Sincerely,
THE .IOHN R. McADAMS COMPANY, INC.
I
Richard J. Dickie, PE
Project Manager
RJD/dcg
Enclosures
cc: Keith Cooper, Landfall Associates

THE JOHN R. MCADAMS COMPANY, INC.
CONSULTING ENGINEERS
POST OFFICE BOX 14005
RESEARCH TRIANGLE PARK, NORTH CAROLINA 27709
[phone] FAX [phone]
June 7, 1996
Ms. Linda Lewis
Environmental Engineer
Division of Environmental Management
Water Quality Section
127 Cardinal Drive Extension
Wilmington, North Carolina 28405-3845
Re: New Horseshoe Lake
Pembroke Jones Park
Stormwater Project No. 951210
LFA-94020
Dear Ms. Lewis:
nE C E I V E
Ipuf JUN 1 01996 D
PROJ H SCuB qs� (`
We are resubmitting these plans, calculations and exhibits for your review and
approval. We have revised them to address the comments contained in your letter
of April 25, 1996.
I am writing this letter to explain the actions we have taken to address each of
your comments from that letter. It is my hope that the explanations and the extra
exhibits I am including will answer your questions and make your follow-up
review easier.
Response to Comments From 4/25/96
The lots that can be restricted to 35% impervious surface area are shown
on the two recorded plats that are included with this submittal. The plat
recorded in Map Book 35, Page 236 shows lots 40, 41, 42, 43, 70, and 71
of Block 4. Of these lots, only 40 and 43 are excluded from the 35%
restriction (they were previously sold and included in this plat for lot line
adjustments only). These lots total 6.83 acres and are included in the
"Project Area" land use calculations.

JUNIu1.9.9fiU
THE JOHN R. McADAMS COMPANY, INC. ""---'
CONSULTING ENGINEERS
POST OFFICE BOX 14005
RESEARCH TRIANGLE PARK, NORTH CAROLINA 27709 n�����/7���(§����
[phone] FAX [phone] _\\V\\ L!k !,B{i +
LETTER OF TRANSMITTAL
To: Ms. Linda Lewis Date: June 7, 1996
NC DEM - Water Quality Section
1
127 Cardinal Drive Extension
Wilmington, North Carolina 28405
"FEDERAL EXPRESS"
Re: New Horseshoe Lake Job No: LFA-94020
I am sending you the following item(s):
COPIES
DATE
NO.
DESCRIPTION
2
2
Site Plans
2
1
Calculations
Letter of Response
1
Exhibits - Plats Exhibits "A" and "B"
1
Exhibits - Wetland Miti ation Plans Sheets S3 s
These are transmitted as checked below:
As requested
X For approval
For review and comment
For your use
Remarks: Dear Ms Lewis: I am providing these items for your review and
approval Please see the enclosed letter and exhibits for our
specific response to your review comments of April 25
Copy to: Keith Cooper. Landfall Assoc.
,Larry Zucchino, Paton-Zucchino
Signe . C
Richard J. Dickie, PE
Project Manager
Ind S8)

EXHIBIT 'A'
PEMBROKE JONES PARK
NEW HORSESHOE LAKE (LFA-94020)
TYPICAL AS -BUILT CONDITIONS WITHIN DRAINAGE AREA
JUNE 5, 1996
SUMMARY OF IMPERVIOUS SURFACE AREAS FOR
11 LOTS IN UNRESTRICTED AREA
LOT
'IMPERVIOUS
LOT/BLK
AREA (SF)
AREA (SF)
% IMPERVIOUS
29/2
20,422
4,110
20.13%
11/2
23,660
10,978
46.40%
18/2
20,000
3,343
16.72%
26/2
21,584
6,948
32.19%
24/2
20,140
5,110
25.37%
28/2
23,172
6,594
28.46%
32/2
20,033
5,574
27.82%
31R/4
33,136
11,190
33.77%
1/4
22,626
6,074
26.85%
3/4
20,245
5,926
29.27%
40/4
23,236
7,485
32.21%
TOTALS
248,254
73,332
AVERAGES 22,569 6,667 29.54%
HIGH 46.40%
LOW 16.72%
'INCLUDES DRIVEWAY PAVEMENT INSIDE RIGHT-OF-WAY STORMWATER
D
E C E I V E
JUN 1 01996 D
D E
PROJ # & W 1210

I
Apr-12-96 09:54A Landfall Associates 910-256-7650 N'P.01
,,,,tanJjd
Lr;NDFALf_ ASSOC, IATE
FAX TRPM-M=rl
TELECOMMUNICATION INFORMATION PAGE
P14:ja e dc_liv.:r the Fo.liow.ing pa:,c(rs) tp:
TIl7. 0nf.pY L. J. LS Ir:1FFl�
L. •�ITIi Il tS III;. ��.:
co me vw w 4 J_*� o.. -4-j6- � u a ..r �.1�► ' op � �+&h
�- — —r p 1
/ J A
Iot.al numb&r of page_, li,CluCiiog t.hiz
1F YOU GO NOT PLCGIVE ALL THI_ MATGF.IAI., F'I_IiA'Ef C:LI..
ACCO.IIIITMC, OrFICF
t silo is55 7,_�;(,
FAX r.IUNCER
LANOTALI ASSOCIATES • P.O. BOX 5360, HANOVFR CENTER STATION • WIL.NINr ION, NORTH CAROI INA 21WO1 • 919-256.6111

0
State of North Carolina
Department of Environment, Health, and Natural Resources
Wilmington Regional Office
James B. Hunt, Jr. DIVISION OF ENVIRONMENTAL MANAGEMENT Jonathan B. Howes
Governor WATER QUALITY SECTION Secretary
April 25, 1996
Mr. Richard Dickie, P.E.
The John R. McAdams Company
Post Office Box 14005
Research Triangle Park, North Carolina 27709
Subject: ADDITIONAL INFORMATION
Stonnwater Project No. 951210
Horseshoe Lake Subdivision
New Hanover County
Dear Mr. Dickie:
The Wilmington Regional Office received a Stormwater Management Permit Application for
Horseshoe Lake Subdivision on December 8, 1995. A preliminary review of that information has
determined that the application is not complete. The following information is needed to continue the
stormwater review:
Please number those new and unsold residential lots within the 260 acre drainage area so
that they can be restricted accordingly, ie., the 35% impervious lots. Attachment A must
be provided with these restrictions and must correspond to the map.
2. Please provide forebays at all inlet points into the pond, a 6:1 perimeter vegetated shelf, and
a recorded access/drainage easement. The plans are unclear as to the exact location of the
inlets. Please note those locations on the plans.
3. A signed Operation and Maintenance Plan.
4. The plans are unclear as to where the proposed pond is Iodated. The bottom, permanent
pool, and design pool contours are not labelled. I cannot verify the areas and volumes at this
time.
5. Please either provide development plans for the townhome site or understand that at the time
of development, the plans and a $225.00 fee must be submitted.
127 Cardinal Drive Extension, Wilmington, N.C. 28405-3845 • Telephone [phone] • Fax [phone]
An Equal Opportunity Affirmative Action Employer

Mr. Dickie
April 25, 1996
Stormwater Project No. 951210
6. The use of the SCS method will produce a volume that is deficient. You provide excess
volume based on SCS, however, you are about 73,800 cubic feet short according to my
spreadsheet, and about 37,600 cubic feet short using the modified Rational method
developed by Schuler as outlined in the Best Management Practices Guide.
7. Please provide a detail of the vegetated filter. According to the regulations, the flow must
be dispersed across a 30' wide vegetated filter and provide a non -erosive flow for the 10-
year storm.
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 February 11, 1996, or the application will
be returned as incomplete. The return of a project will necessitate resubmittal of all required items,
including the application fee.
If you have any questions concerning this matter please feel free to call me at [phone].
Sincerely,
Ms. Linda Lewis
Environmental Engineer
DA/arl: S:\WQS\STORMWAT\ADDINFO\951210.JAN
cc: Keith Cooper
(Lnd"a IXwi
Central Files
VA

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Prepared by and return to V. Randall Tinsley, Brooks Pierce McLendon
Humphrey & Leonard, L.L.P., Post Office Box 26000, Greensboro, N.C. 27420
B 0 0 K PAGE 7cx I. p. l� ,205//9-Oos • OZct
1 9 7 5 - 0 M OF CONSERVATION EASEMENT
THIS DEED OF EASEMENT, made this 2U day of December, 1995, by and between
LANDFALL ASSOCIATES, a North Carolina joint venture, and its successors and assigns,
hereinafter called Grantor, and NORTHEAST NEW HANOVER CONSERVANCY, a North
Carolina corporation, hereinafter called Grantee.
00049 WITNESSETH
WHEREAS, Grantor is the owner in fee simple of approximately 27.72 acres of real property
situated in New Hanover County, North Carolina and more particularly described in Exhibit A
attached hereto and incorporated herein by reference ("Property");
WHEREAS, Grantor desires to conduct certain work at its Horseshoe Lake Complex,
including the creation of Upper Lake, the removal of sediment and other improvements to Horseshoe
Lake, and other work, including the work described in the U.S. Army Corps of Engineers ("Corps")
Permit No. 199500221 and any amendments or modifications of Permit No. 199500221 ("Permit")
("Lake Work");
WHEREAS, the Lake Work will result in a discharge of dredged or fill material in waters
of the United States, including wetlands, and therefore cannot be lawfully conducted without a
permit issued by the Corps;
WHEREAS, the Permit authorizes Grantor to conduct the Lake Work and requires Grantor
to implement a Mitigation Plan which incorporates the preservation of 12.32 acres that are located
within and constitute a portion of the Property;
WHEREAS, the Permit requires Grantor to maintain 12.32 acres as wetlands and open water
areas in its current condition as modified by the Lake Work and Mitigation Plan and to convey to
Grantee or other entity approved by the Corps, a conservation easement covering the 12.32 acres;
WHEREAS, Grantor desires to obtain, for use in future permits, credit from the Corps for
preservation of 15.40 acres of additional wetland and open water areas which are within and
�� constitute a portion of the Property and are adjacent to the 12.32 acres which are required by the
Permit to be preserved;
WHEREAS, the North Carolina Conservation and Historic Preservation Agreements Act,
N.C. Gen. Stat. § 121-34 et seq., permits the creation of conservation easements;
WHEREAS, Grantor desires to obtain any available tax credits, tax deductions, and other tax
benefits, including reduction of tax value for ad valorem taxation, connected with or arising from
the conveyance of a conservation easement to Grantee;
WHEREAS, Grantor, in consideration of the present authorization to conduct the Lake Work
granted by the Permit and available tar benefits, is agreeable to conveying to Grantee a conservation
RE UPMED TO Ke i tcoop
LpCi�
"vJ A.uoc;1940�
ai0-.2q .7G16

TwI
BCC PACE
_975 0`i45
easement restricting and limiting the use of the Property as hereinafter set forth, and Grantee is
willing to accept such easement;
WHEREAS, Grantee is a nonprofit corporation whose purpose is to preserve and conserve
natural areas for aesthetic, scientific, charitable, and educational purposes;
NOW, THEREFORE, in consideration of the issuance of the Permit to conduct the Lake
Work and other good and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, Grantor hereby grants, conveys, and establishes for Grantee a conservation easement
which shall authorize the Grantee to take appropriate legal action in law or equity to enjoin, prohibit,
and remedy any violation of the terms of this Conservation Easement and to enter the Property at
reasonable times to observe and document the state of preservation and to prevent any violation of
the terms of this Conservation Easement_ with such entries to be made in a manner which will not
unreasonably interfere with the use and quiet enjoyment of the Property by the Grantor.
1. Except as required for dam, pond, or wetland maintenance (including, without
limitation, selective pruning, and control of nuisance plants such as cattail, willow and wax myrtle,
and water level management), installation and maintenance of underground utilities, construction
and maintenance of a bridge within a right-of-way approximately 100 feet wide near the southeast
corner of the Property, construction and maintenance of boardwalks, decks, and similar structures
for scenic and recreational access, and construction and maintenance of point source discharges into
the ponds within the Property to facilitate their stormwater detention function, the following
activities are prohibited:
a. Construction or placement of buildings, roads, signs, billboards, or other
structures on or above the ground;
b. Dumping or placing of soil or other substance or material as landfill, or
dumping or placing of trash, waste or unsightly or offensive materials;
C. Excavation, dredging, or removal of gravel, soil, rock, or other material
substance in such manner as to affect the surface; and
Destruction or removal of wetland plants.
Grantor reserves all rights as owner of the Property except as prohibited herein.
3. Grantee shall not be responsible for any costs or liabilities related to the operation,
upkeep, and maintenance of the Propem .
4. Grantor shall pay any and all real property taxes and assessments levied by competent
authority on the Property.

I"
HOY, PAGE
1975 0446
5. Enforcement of the terms and provisions of the conservation easement shall be at the
reasonable discretion of Grantee, and any forbearance of Grantee to exercise its rights hereunder
shall not be deemed or construed to be a waiver of Grantee's rights hereunder.
6. Grantee shall hold this conservation easement exclusively for the purpose set out
herein. Grantee shall not assign, convey, or otherwise transfer its rights and obligations under this
conservation easement without the prior written consent of Grantor, which may not be unreasonably
withheld.
7. Grantee, in order to exercisee the rights granted to it in this conservation easement,
shall, at reasonable times and in a reasonable manner, have access through Landfall and Pembroke
Jones Park to the pedestrian easement that extends from Shelter Cove Place to the Property. Grantee
shall use no point of entry to the Property other than the pedestrian easement that extends from
Shelter Cove Place to the Property.
8. If any provision of this conservation easement or the application thereof to any person
or circumstances is found to be invalid- the remainder of the provisions of this conservation
easement shall not be affected thereby, as long as the purpose of the conservation easement is
preserved.
9. All notices, consents, and approvals hereunder shall be in writing and shall be deemed
properly given if sent by United States certified mail, return receipt requested, addressed to the
appropriate party or successor -in -interest.
10. This conservation easement shall not be construed as restricting, in any way,
Grantor's right to convey all or any portion of Grantor's interest in the Property, except that the
terms, conditions, restrictions and purpose of this conservation easement shall be inserted by Grantor
in any subsequent deed or other legal instrument by which Grantor divests itself of any interest in
the Property. Any future holder of Grantor's interest in the Property shall be notified in writing by
Grantor of this conservation easement. Grantor shall notify Grantee of the name and address of any
person or entity to which the Property or any part thereof is conveyed.
11. This conservation easement may be amended, altered, released or revoked only by
written agreement between Grantee and Grantor which shall be filed in the public records in New
Hanover County.
12. This conservation easement shall run in perpetuity with the Property and shall be
binding upon the Grantor, its successors and assigns.
THE GRANTOR covenants and represents that the Grantor is the sole owner of the Property
in fee simple and has good right to grant and convey the aforesaid Conversation Easement; that the
Property is free and clear of any and all encumbrances except the following: all matters of record
which affect the Property; the Permit; and the rights reserved herein by the Grantor.

a00;
PAGE
.I
1975
0947
TO HAVE AND TO HOLD unto the Grantee and, subject to Grantor's written consent as
provided in paragraph 6, Grantee's successors and assigns, forever.
IN WITNESS WHEREOF, the parties have set their hands and seals, this the day and year
first above written.
MENU,/ HANOVER
CONSERVANCY
ATTEST:
Secretary
LANDFALL ASSOCI.ATES, A North
Carolina oint Venture (SEAL)
(SEAL)
utho ed Agent
By: (SEAL)
�7"6ri
ed Agent 5 Ke; N wPev
NORTHEA_ ISW- O--11ER
C VANCY
By:
President
SCHEDULE OF EXHIBITS
A. Legal Description of Property Subject to Easement
0
VERIFIED
REGISTER OF DEEDS
NEW NANOVER OO.NO
gg al 12 fin 1124

7
S00 PAGE
975 O'i'i8
STATE OF NORTH CAROLINA
Ncw. o,woocr COUNTY
I, �e� e { ai n1✓�S e� m L� y a Notary Public of the County and
State aforesaid, certify that ShiRtey'A mG\,• ieItl and S.Y)ei9-hCgoper
personally appeared before me this day and acknowledged the due execution of the foregoing
Instrument, by authority duly given and as the act of LANDFALL ASSOCIATES, a North Carolina
joint venture.
WITNESS, my hand and official stamp or seal, this the a as day of IJ ecem6<r , 1995.
Arm A , / o !u'L"
"psmrn Notary Public
tj
M Gt4nntjlll -yres:
10TARV��
[NO' ZY'SBAL]
m � Pug
""'.OVER
"'OVER coQ�y�s�,
STATE114, N0111I-I CAROLINA
p>i 4wc.eTCOUNTY
I t _ K, e� V— , � :tt � , a Notary Public of the County and
State aforesaid, certify that C(J a-e- V2 personally came before me this day and
acknowledged that _he is Secretary of NORTHEAST NEW HANOVER
CONSERVANCY, a North Carolina corporation, and that, by authority duly given and as the act
of the corporation, the foregoing instrument was signed in its name by its
President, sealed with its corporate seal, and attested by A,,_ self as its
Secretary.
WITNESS, my hand and notarial seal, this thea?� day of J)e ge , 1995.
My Commission Expires:
^;,..
1V%: ; J aB L1
Notary Public
STATE OF NORTH CAROLINA
New Hanover County
The re g/ Annsxed rtificate(s) o e
L.
Notary (Notaries) Public is/ are c_er iffiied
to be correct. This the /1 day oZ / 0 197A
ary Sue Oots, Register of c
by uty/n,

",W
STANDARD EXCEPTIONS
The attorney should initial any exceptions that are to be eliminated on the line to the Left of the exceptions.
Interest or claims not disclosed by public recores, including but not limited to:
(a) Unrecorded Mechanics- or Materialmen-s tiers- (Liens may be filed by persons or entities furnishing labor or
materials to any improvements of real property within 120 days from the last day of performance and will upon
perfection relate in priorioty to the first day of performance as a valid lien on real property.)
(b) Unrecorded Leases. (Under North Carolina law, parties in possession of the premises under a verbal orunrecorded
lease of three years or less duration may remain in possession under terms of the tenancy.)
(c) Matters that may defeat or impair title which do not appear on the record. (Evidence revealing missing heirs,
forgeries, etc. may not be on the public records, but such facts if properly established may impair or defeat
what appears to be a good title on the record.)
(d) Taxes, special assessments and other goverrr taL charges that are not shown as existing liens by the public
records. (Governmental charges may be made for acreage fees, tap -on fees, cost of weed cutting, demolition
of condemned buildings and other matters that are not shown as existing liens on the property by the public
records.)
(e) Unlisted personal property taxes. (If discovered, such taxes and any penalties may be assessed as a lien on the
subject property.)
2. Matters occurring prior to and subsequent to the inclusive dates of examination.
— 3. Matters which would be revealed by a review of the public records regarding the proposed puchaser/borrower, who is
not a current owner of the property.
— 4. Any inaccuracies and discrepancies which an acc,rate survey of the property may disclose. (A survey, if procured
from a competent surveyor or civil engineer, will normally determine whether improvements lie within the boundaries
of the property, whether existing utility lines, roads or other easements cross the premises, and whether there are
any encroachments.)
— 5. Security interests that may have attached to fixtures on the subject property as provided in Article 9 of the Uniform
Commercial Code of North Carolina.
— 6. Compliance with any local, county, state or federal government law or regulation relative to environment, zoning,
subdivision, occupancy, use, construction or development of the subject property.
— 7. federal judgments, liens, and proceedings filed only in the Federal Court. (Upon the filing of a petition in
Bankruptcy, title to real property vests in the Trustee in Bankruptcy and notice thereof is not always required to
be filed in the County in which the Bankrupt csts property; federal condemnation proceedings may vest property in
the federal government and notice thereof is to required to be recorded among the County records.)
— B. Civil actions where no notice of Lis pendens against subject property appears of record.
Note: The matters included in Standard Exceptions Nurser One (1) above set forth are itmes that cannot be checked.
Standard Exceptions numbered 2, 3, 4, 5, 6, 7 and 8 can be eliminated. Any such elimination is evidenced by the initialing
of such exception in the left margin by the attorney.

w REVISED
PRELIMINA.?Y OPINION ON TITLE FOR
NORTHEAST NEW HANOVER CONSERVANCY
The undersigned has examined the record title on the New Hanover County records (and
municipal tax and assessment records if within a municipality) for the period shown
below relative to title to the real property described below, and gives the following
opinion of status:
Owner(s):-Landfall Associates
Interest or estate: Marketable Fee Simile
Property Description:
All of the Conservation Easement Areas 1, 2, 3, and 4 encompassing approximately 27.72
acres as shown on the plat entitled "TAndfall Subdivision II, Horseshoe Lake Complex
Conservation Easement" recorded in Map Book 35, Page 198 of the New Hanover County
Registry.
Subject to the uninitialed STANDARD EXCEPTIONS on the reverse side hereof
Also subject to the following SPECIAL 117FORMATION AND EXCEPTIONS:
Taxes:
1. Ad valorem taxes have been paid through and including those for year: 1995
2. Taxes now due and payable: ............................................ NONE
3. Taxes, a Lien, deferred or otherwise, but not yet due and payable:... NONE
4. Special levies or assessments now due or payable in future installments: NONE
5. Estate or inheritance taxes: ......................................... NONE
Restrictive Covenants? Yes [ X ]; No [] (Attach Copy).
1. "Book 1399, Page 1310 THE RESTRICTIONS ONLY APPLY TO CONSERVATION EASEMENT AREA NUMBER 4.
2. Does survey and/or public record indicate a violation? Yes [ 1; No [ ); Unknown IX1.
3. Contain reversionary or forfeiture clause? Yes C ]; No [XI
4. Building Setback Line(s) of _ feet from front; _feet from side; _feet from side street; _ feet from rear;
5. Easements/Other Matters:
Survey and Inspection Report Attached? Yes ( ]; No [X].
Recorded Plat? Yes [XI; No [ ]
1. Book 35, Page 198; Book 34, Page 186; Book 27, Page 197; Book 30, Page 146; Book 27, Page 55.
2. Building setback Line(s) of feet from front; _feet from side; _feet from side street; _ feet from rear;
3. Viokatec17 Yes [ 1; No [ 1; Unknown [X1.
4. Easements/Other Matters:
Access to Public Right of Way? Yes [X1 ; No[ 1.
Direct[XI; or over a Private easement[ I? (if private easement, attach copy).
If over a private easement, has a search been made of adjoining property on which easment crosses? Yes[ 1; No[ ).
Property Occupied By: Owner[ ] Tenant[ ]; Unimproved [X1; Unknown[ ].
Updating from previous Title Insurance Policy? Yes[ ]; No [XI (Attach Copy).
If "Yes", has a search of the public records been aczeoplished for such period of time within which judgments, liens or other
matters could affect the property, regarding the owrer(s) of the property on and after the date of said policy? Yes[ ]; No[ I.
Other Easements, Liens, Deeds of Trust, Objections or Defects:
1. 'Master Cross Access Easement and Maintenance Agreement recorded in Book 1515, Page 1583 and amended in Book
1559, Page 1021, Book 1691, Page 601, Book 1893, Page 361, New Hanover County Registry. (THIS APPLIES ONLY TO
CONSERVATION EASEMENT AREA NUMBER 4)

1W
BOOK P;4GE
1975 0449
EXHIBIT A
All of Conservation Easement Areas 1, 2, 3, and 4 encompassing approximately 27.72
acres as shown on the plat entitled "Landfall Subdivision II, Horseshoe Lake Complex Conservation
Easement," recorded in Map Book 35, Page 198 of the New Hanover County Registry.

DIVISION OF ENVIRONMENTAL MANAGEMENT
NORTH CAROLINA STORMWATER MANAGEMENT PERMIT APPLICATION
I. GENERAL INFORMATION:
1. Proje`ctName: Upper Pond at Horseshoe Lake
2. Project Location: (County, State Road, Address) Corner of Arboretum Drive
and Pembroke Jones Drive in Landfall, New Hanover County
3. Owner's Name: Landfall Associates Phone: [phone]
4. Mailing Address: Post Office Box 5368
city Wilmington state NC Zip 28403
S. Application Date: October 27, 1995 Fee Submitted: $385.00
7. Nearest Receiving Stream: Horseshoe Lake Class: C
B. Project Description: Creating a 10.44 acre lake (normal pool) for water
duality control and wetland mitigation.
II. PERMIT INFORMATION
1. Permit No. (will be completed by DEM): 5C,QI "IS 1210
2. Permit Type: x New
3
4
Modification (existing permit no.)
Renewal
Project Type: Low Density X Detention
Infiltration
Other State/Federal Permits/Approvals Required:
(Check appropriate blanks)
X Sediment/Erosion Control
III. PROJECT BUILT UPON AREA Project
Total Area
Drainage Drainage
Basin Basin
Classification C C
Allowable Impervious 78.0 Ac.* 16.7 Ac.*
Total Project Area 260.0 Ac. 55.7 Ac.
Proposed Impervious 149.7 Ac. 35.5 Ac.
Impervious Area 57.5% 63.7%
*Based on 30% Low Density Option
Other
CAMA Major X 404 Permit
Total DA/PROJECT DA
Breakdown of Impervious Areas
Buildings **
Roads **
Parking **
Other **
Totals 149.7 Ac./35.5 Ac.
**Future Development - Unknown

IV. STORMWATER TREATMENT (Describe how runoff will be treated):
Wet detention pond with a storage pool for runoff from the 1 1/2" storm inverted
siphons to maintain normal pool and draw down the storage pool weir box and
emergency spillway to pass larger storms.
V. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
Deed restrictions and protective covenants are required for all low density projects and
all subdivisions prior to the sale of any lot. Please see Attachment A for specific
requirements.
By your signature below, you certify that the recorded deed restrictions and
protective covenants for this project shall include all the items required by the
permit, that the covenants will be binding on all parties and persons claiming
under them, that they will run with the land, that the covenant cannot be changed
or deleted without concurrence from the State, and that they will be recorded
prior to the sale of any lot.
OWNER'S CERTIFICATION
I, S. Keith Cooper certify that the
(please print name clearly)
information included on this permit application form is correct, that the project will
be constructed in conformance with the approved plans, that the deed restrictions will
be recorded with all required permit conditions, and that to the best of my knowledge,
the proposed project complies with the requirements of 15A NCAC 2H.1000.
I authorize the below named person or firm to submit stormwater plans on my
behalf.
AUTHORIZED AGENT
Is —
Person or Firm Name: The John R. McAdams Company, Inc.
Nailing Address: Post Office 14005
City Research Triangle Park state NC zip 27709
Phone: [phone]
Please submit application, fee and plans to appropriate Regional Office.
(see attached map)+ts'£{i•i,R�;�,
_ EC.E
2 DEC 0 8 1995
DEM
pROJ # S�ua `�SIZ10

. • .0
THE JOHN R. WADAMS COMPANY, INC.
CONSULTING ENGINEERS
POST OFFICE BOX 14006
RESEARCH TRIANGLE PARK, NORTH CAROLINA 27709
[phone] FAX [phone]
Upper Pond at
Horseshoe Lake
LFA - 94020
Calculated by
Checked by:
D.A. Clark
R.J. Dickie
September 15, 1995
q
d 4,.
Ski 17A T R
U
DEC 0 8 095
DE:M
PROJ' w8951Z1�
SEAL
15391

THE JOHN R. McADAMS COMPANY, INC.
.• IpI IpI� P.O. Box 14005
IIII �: Research Triangle Park, North Carolina 27709
�� [phone] Fax [phone]
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1A
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P.O. Box 14005
Research Triangle Park, North Carolina 27709
[phone] Fax [phone] tw q'IS'95
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PAGE ✓ OF � `
J R McA JOB NO. �A" --In 0� DATE 7A S BY DAC. CHECKED BY
THE JOHN R. McADAMS COMPANY, INC.
P.O. Box 14005
Research Triangle Park, North Carolina 27709
[phone] Fax [phone]
CLIENT
SUBJECT
LAND V-Sr, SWI!AA2y < <Ot LS I NFofLLAA ot�
S01L T`3 PUS S
• La
- L/`i�- AND
1A
• Y-r
_ 1:�Veee
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• My
- twtVkN 1LLe
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.Le.
(Date)
peIMA2y Sl r-e.00Afi,1j ,os1s of 'tA'V6eAGE -N W- 64s.G \B If
FESiDFr1T1A�. ToluN"tiCme f 05ajo IMF' ` 41,73 A- e G - �Ghl = q-Z
• N� PLwi7 5ve-FTec. A = 10.�4.Ac @ .C'=: I.00:.�Cnl =lop ..;:_.
"MIT)GA-T(Cv,l .SEA t NOT f`am, INUNDkTE7 = 3,5�AcG .
TOTAL r 55.10 R� S C. � 0165 / G.1 = C1 I
TOTAL. WANAGS /gam kO NeL�J PbND
TmAt� 'Dh = Z(o 0 ACRES
• Peo1ECr f-p� = 515,-10 Ar, @ G = 0.e�3 /ct-b= C11
• CoN5Eeu4T+ CN AV-t-A SwAti1 P = ?�1, 5 Ac, G C, = 0, 10 /Cr 3 = 36
• &PAS6.6n sT2.F--�r R/w = (�.S A(�- C, c- 0,zz �cn► _ �I
• St2CE�S T 9 Ac. @ C , 0. 9'5 (' r � S
•P-�-s)pjDvn at. L 351)0 1MPC; ,yIOJS = 11560 Ar, @� C�O.Q/0,.- = 74
• ers1DET-)I)ALL L Icola IM):Ce-vIcvs = Bo. I Iv, .>.aa C= 0.9s `/GN 93
Totem, = 24P0 I-- e G = 0• la to l W = 66

THE JOHN R. McADAMS COMPANY, INC.
P.O. Box 14005
Research Triangle Park, North Carolina 27709
[phone] Fax [phone]
--•- '�1 //]] ''rr PAGE �- OF
J R McA JOB NO. IJA - �140?0 DATE ZN �S BY PAL CHECKED BY
(Dale)
CLIENT PROJECT
SUBJECT I •S /1 ST0.2M Pi'O CAI.GS•
51GR-AGE �E I D Tpy- 1,S 'Srcx7 M Q-.Io S1z*-AG-e
CAt,CALATE StOZAC£ f-&P-104e-0 Z> CAPIWP-E ♦tunic-C- Fit FiF-ST
I,6.. Or 0J6�11L�Tnil?C DaA1NA6E AeCA --
070 lm pef-MouS G?s GS:.
• "PpoleGT "' ker-14
- 55.'70 Ac. @.
IMPb�ulW5, CMA%,C>
• Cm5e7LvATlON
AV-t-A =
34,SAC. @
01, lmp ;�ulotls
GEASSeD STR-�-r ?-/w
= G.SAC- @
07. IMP.
• STeae s = %, 9
AC @
1009. 1 m Tp
• kP-z l OEX0 Y1 AL- =
I S6. I
AC ° ece,57o I M P
(Gi7kL - 'L(a 0 AC- CD S1,1 _ 9, 1 M R
°/0 1MPIulauS i Ddc ` �.S•�e CGI�1 =2e�
R 40 Fforvl I.5 Il SIa2M ` Sl)I!-AGE RED D
S = 1000 - c I Oaf
GN 80
2 2
�,c = P- O,ZSI.SII - 0,2 2.50")
P 4-0, 05
43GL-o 5F 1 Fr
At lZ l�
00 VCWMG _ Z6P41 j i30 GP VEZM2t SbV-AGE

THE JOHN R. McADAMS COMPANY, INC.
P.O. Box 14005
���;;; Research Triangle Park, North Carolina 27709
��� [phone] Fax [phone]
o n PACE
J FtMcA JOB NO. LEA 42 Z- 0 DATE '5 I 1 I 1S BV DkL CHECKED BY —
CLIENT PROJECT
SUBJECT
AS50f—I A-TSO SrAPoF. Fcr_ RG&ut eto SUP -AGE --:!>
5 OFF
(Date)
F*oM SrArF- - SI)e A&5 FuN) Njew POND
5 = 3513ZroD ) DAT00 = 3.S Ff, (LIM IT OF S-S FKN
6Ve-AGE @ 5T)<C-E ' 1.5 PT = (tJcAMN. PaoL EL. S,O Pr,)
S - 359 Zbo ((.S)1,21 " 505 ISZ GF
"DI11RJAc- SbQAGE �E 'D AeCV5 f bIZAAL FWa = Zldi,93D Cr-
;' Sl s'"rtlo,e� 5651'5Z cr- a- 2W9,g3o cF = 0551o0Z CX-
A�6ocunti 7o STACK
I
555, oaZ CF
355, Zbo '
FT �A'e&j6 3,S Pr S-S 'PfN UM IT>
STAle6 A-EDVS ON � P_L, P-MD = Z.1 Fr - I,SFT = 0-6Fr.
LOWE5r POI r3f lD StT W61 12- wC -FL--w = t1, S.(� Fr.
��=r v)De- ovVf&Rotr) IS El - (a -D FT. ��= Z 5 FT j AeNe S-S UM IT)
1.21
STD2kC�E PSI DtD AEME N. P, 500 5 40 C'F

THE JOHN R. McADAMS COMPANY, INC.
P.O. Box 14005
Research Triangle Park, North Carolina 27709
[phone] Fax [phone] n ,L�
PAGE WOF
J R McA JOB NO. LEA --1412l0 DATE 24 S BY M- C— CHECKED BY
CLIENT PROJECT
SUBJECT
CN�G(, SA /DA �,kli.o AT ND2.M,At, �•gZlr
�o IMPC" IvuS 'DA ' Z(o0 hG.
,A @Nv 4S4 sr- ( Io . 44 Ate)
(Date)
USING �'% "fSS PxmGvA-L �?J.p VirGrl�t1;]� FiuL6= �^.V1ie�'�l
'FbND DL-PV = t S.6) Pr,
51170a� L ' �
'n-0, 3r l iNi�1C..Pt7l.A't}ry
�aoi o 3.2
?-G)QuIaA-D S..A/DA = 3,1 07.,-4* -11,�A
:. B.aulaO) SA
100 sr-
'�k (4S4196 5r- ( 351jl O SF)
POND �PVNCRONS AS 90-40k9-ED T-Ca- FE� ZiA ,
30/ vECeTm F,Ctti 15 Pz?vilIZED (85% Tss
-IRE RAND bP-A1N;; IN -to Ftr%RSE �fzcE U�tcG , Irol N I "-t- Lei r".C"
FjPV.; I%A�ItUL� �t,MtcR�ci. 7N. VEGF.TAlt� AftEi� "U1ND5
Elt2ouND IAV-r~ ACT A5 I)itE kF-Z2uly�El7

85% TSS REMOVAL
30 FOOT VEGETATED FILTER REQLM=
DEPTH 3' 3.5' 4.0' 4.5' 5.0' 5.5' 6.0' 6.5' 7.0' 7,5
ASP �
10% .9 I.8 �.7 .6 1 n In n In I I�
20
1.7
.8 I 7 I 6 I
S
3u %
1 2.5
2.2
1 1.9
1.8
1.6
1.5
1.3 11.2 11.0
.9
40
3.4
13.0
2.6
2.4
12.1
1.9
11.6 11.4 I 1.1 I
1.0
50 %
4.2
3.7
3.3 13.0
2.7
2.4 12.1
11.8 11.5 11.3
60 %
5.0
4.5
3.8 13.5
13.2
>
2.9
2.6 2.3 12.0 11.6
70 %
6.0
5.2 14.5
14.1
3.7 _ 13.1
12.9
2.5 12.1 11.8
80 %
6.8 16.0
5.2 14.7
14.2
3.7
3.2 2.7 12.2 12.0
90 %
7.5
6.5 15.8
5.3 14.8
4.3
3.8 13.3
2.3 11.3
100 % 18.2
17.4
16.8
16.2 15.6
5.0 14.4
13.8
( 3.2 2.6
90O7o TSS REMOVAL
NO VEGETATED FILTER REQLMtED
DEPTH
I 3'
13.5'
14.0'
( 4.5'
15.0'
5.5' 6.0' 6.5'
7.0' 7.5'
afp o
10%
1.3
11.0
I .8
I .7
I .6
.5 I .4 I .3 I .2
I .1
20 %
12.4
2.0
11.8
1.7
1.5
11.4
11.2 11.0
.9 .6 j
30 %
3.5
3.0
2.7
12.5
12.2
11.9
11.6
11.3
1.1
.8
10 %
4.5
14.0
13.5
3.1
12.8
2.5
12.1
11.8
11.4
50 %
5.6 15.0
4.3
13.9 13.5
3.1
12.7
12.3 1.9 11.5
60 %
7.0
6.0
5.3
4.8 44.3
3.9
13.4
12.9 12.4 I
L 9
70 % 18.1
7.0 16.0
15.5
5.0
4.5 13.9
13.4 f 2.9 12.3
80 % 19.4
18.0
17.0
16.4
15.7
(
5.2 14.6
14.0
13.4 12.8
90 %
10.7
9.0
7.9
7.2 16.5
5.9 15.2
14.6
13.9
13.3
100 % 112.0
110.0 18.8 18.1
17.3 16.6
15.8
15.1
14.3
13.6

THE JOHN R. McADAMS COMPANY, INC.
P.O. Box 14005
Research Triangle Park. North Carolina 27709
[phone] Fax [phone]
•• PAGE � OF 4z
J R McA JOB NOLFA — _I 402o DATE1912A 9S BY PAC CHECKED BY
(Date)
CLIENT PROJECT
SUBJECT
UmIr+.1 5TD(�M ►yRobME�r
-fork. DA = 1-too A 2, 9 C = 0. Ido / C'm = 00
• -T1nlE OF
• P DGE TO COM Se✓ WA ` -C" AI�� ! SW De'Iu5
• SW D('tvl; 10
-I i o'
�IG� r-•�r�w= ar2 x'tG
SMf�U. POPO iO
V- 1 S00 f
1�GGt?-y a:1?� 3 1
o,sBS -1 p 35S
l 1 I D 500
T 24 ` IS"?j 'I' 0r2 1.IS + 0r2 W $,O
120
IZ$ 123
TL (v15.4 M1M
Swm R-e4uENUES ut4om SwT : Wif- 125`!- /SoyR• /txp—

THE JOHN R. McADAMS COMPANY, INC.
P.O. Box 14005
�;� Research Triangle Park, North Carolina 27709
m� [phone] Fax [phone] Q Q
I �nn -1 �-. 5� PAGE OF `�
J R McA JOB NO. �-F' k - `i4o2D DATE V 2 S BY DAC. CHECKED BY
(Date)
CLIENT PROJECT
SUBJECT
• INT SIi1tS �F�a4t w1Lmtrj6ia�
Z1O 3o t i � 304- (o5A
3
�25 3z +TG -- -- 3z+-WS,4
a
50 3z,+ i4
Ilan 34 t-7L
• pElA`r- f7iCW IZArr,'S
3,oaw 1+e
3t43'a��
31 10 113/
F.
Qlo = iD. (dam J � Z . (v4 I N/►#>�� � uvo JFC.� - c{�-�D CF.S
QZ5 CO lo(o�` 3.0$ IN/ii1e� 2loDAG� = S30 GFS
Qso = (O.bbi�3.43 In1/��2✓�AL� = S°IO cFS
iOG0 cps
• -F1ND - Ale. TrnES P:ri ►7G'5taN SZRrAS
_p = 4.5Z60,10
Imo.
PL I vs
t
Pa,,00 ' �,o� IN•
S I � — 10 = Z.50))

THE JOHN R. McADAMS COMPANY, INC.
P.O. Box 14005
Research Triangle Park, North Carolina 27709
[phone] Fax [phone]
•• nn Qd rv'f �. A r� PAGE � OF 4Z
J R McA JOB NO. L�r-[ _ I �r= DATE Z`� � BY ✓AC� CHECKED BY
(Date)
CLIENT PROJECT
SUBJECT
a1O
I
4.(bz+ 0.6 Lswj)
QId,
[5.11 - p.Z
Q* _
�,uo - 0,2
SD
�,u� �o
4 _
[?' Doi- 0r2 �Z.56) 2
4�S 2,101109
T1A"E --Atc I F?,ONN TAC WWA-W(rJL• QUA-TICr l
A = Ac.uES
Qp = CFS
TP = moo
Tpjto =
&a.6 MtN
op,,,, =
450
CFS
TPIzs "
-7s.l MIN
@
OP1K
= 53o
cFs
TPrSO ! 1. - Mto @ Op, — 590 C'FS
TPIIC* - e3.2 M ,0 @, op,1,, -- &so as

Sheetl
Stage -Storage Function
Project: New Pond at Horseshoe Lake (LFA-94020)
Contour
(feet)
Stage
(feet)
Contour
Area
(SF)
Average
Contour
Area
(SF)
Incremental
Contour
Volume
(CF)
Accumulated
Contour
Volume
(CF)
3.5
0.0
285823
4.0
0.5
352010
318917
159458
159458
QQ 5.0
1.5
454755
403383
403383
562841
6.0
2.5
541110
497933
497933
1060773
7.0
3.5
587446
564278
564278
1625051
8.0
4.5
605973
596710
596710
2221761
9.0
5.5
624500
615237
615237
2836997
10.0
6.5
643027
633764
633764
3470761
Storage vs. Stage
3500000
3000000 -
y = 358255x' 2072
R2 = 0.9996
2500000
LL
v 2000000
rn
c 1500000
N
1000000 ..
500000
0
0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0
Stage (feet)
Ks= 358260
b = 1.21
Page 1

THE JOHN R. McADAMS COMPANY, INC.
P.O. Box 14005
Research Triangle Park, North Carolina 27709
[phone] Fax [phone]
PAGE 17- OF
J RMcAJOB NO. UA- ``(OW DATE 0 3 0119' BY ✓r'� CHECKED BY
CLIENT PROJECT AGW LAY�F, V Hof-S LAr-fi
SUBJECT I-160"' lAj(=E
�,��� - STb(LkGE r NLnorJ �2 Ex1sTiNU t-base IhK-C
ti09-f,4A , Pao(, Wsa- ' 3.lo PT,
GGh.riDJ(L
A-v(o, Cwrin p-
We—
/IC.CUIN
A(�c,
A-e-CA
`�T�Cz
Uowr�E
Vown�E
GOnJ'71aJ
C F(pr1
c c
c F
3-cD
21039-7
D
4
Z-7Gg00
Z47 14S
0, 4
90059
g6e)59
4,S
37,S(oSo
-3o-i2ga
0.9
IS3b4S
ZSZSO4
45,0
4z1oizo
38z-�00
1.4
►` 1-650
443OS4
STjkGE - SiDe�tGE FkN '�
FIT, w4 pwom Cua.VE
KS = Zg21']g4 c0e-2CLA-rI0NJ-- 0,g01 1(o7
b = 1. lq4 e = omgq-6
S = 24)2,'14)4 S'.Iaq

THE JOHN R. McADAMS COMPANY, INC.
P.O. Box 14005
Research Triangle Park, North Carolina 27709
[phone] Fax [phone]
• Q�f PAGE `� OF
J R McA JOB NO. J, � — 40ZQ DATE L BY QA"✓; CHECKED BY
(Dale)
CLIENT PROJECT
SUBJECT I EOM) SIPHnj D.JI&J
SIPI-1co t3A5e7o a'j ko'�W6 Stop- (:unxA-)or'j T { \
OR,pv'c TALON (MAL,6cP-1I 13E4Enn c� UR-&W S1U2MWA't--9- OES� l.._
TUe- C21 Gt C-E
Q-C,A��~
lur ICA4 CA" BE R V-Int" kS s
1jz
Q= 0,0431 Cppy 6iD/Z )-
Ct, = o,Go
b= SIPHcN 01k. �7In17
(� = 5M-bN FLOvJ L CFS]
STAC AeojEu
s1vpvf--� lmveaT [R"
SF OPeNIr,)& NOT SU BMEP �D J ©el ti� U90MID3 VCM t—ZT � Ll
lY� 11W, Fmt, vw&
Q ' 0,312 cot) (70z I5A/46 wos As Aa—,% ]
�iPY OSF T MIGNED VC2 CAuu%-A1106 8,i FALUN6 HEAD.
-'21eP5 1OR- ALu NG HE�Ao aNX-t kiLAT174J 7
/ QAv&
/ QXJ& (Q-1 r, NJ
"?TA 0' E
— VV-4U— VOL (IaZ-)
Wct2. *11a-(1.1-I N)

INTHE JOHN R. McADAMS COMPANY, INC.
P.O. Box 14005
Research Triangle Park, North Carolina 27709
[phone] Fax [phone] ry Lv q bs IC�s PAGE �4 OF �2_
Iw
J RMOA JOB NO. LFk -R4C)Za DATE 9 10 qS BY DA- CHECKED BY
CLIENT
SUBJECT
OALWLfmaj Of -DME R-M0i2M
m tor-IL.
Da�r.l TINIE = G
L AC-, P OF SisTEM
(Date)
a,,mPtow We1e t, l0.43
n EL1o.o
I StMAC E POO- so0 zoo r�
2-7-4'0 e+gWS 6,S OD = 0,10Fr j 261930CA
I (NULT-TIZ wr- S(cr+t" (S�
vse (0- Q"¢
1Nv. our EL
of 3,8 DAIS
WC I WEF-Tm SI NA>js AT
SO ) FDk- DG.-AWj)DWO T1PA'r
Q '%� AITACOED rcf - CAe.Ls . At6o It..l C.LsJ O F—'>
CCMPAf,15cr.1 01 kr---ate 'rVt�AO W,'n' iCU.

John'R. McAdams Company, Inc.
Pagl/1e5 Z
Inverted Siphon Design Sheet
D siphon =
4 inches
No. siphons =
6
Ks =
358260
b =
1.21
Cd siphon =
0.60
Siphon Invert =
5.00 feet
Volume @ Normal Pool =
585152 CF
WSEL
(feet)
Vol. Stored
(cf)
Siphon Flow
(cfs)
Avg. Flow
(cfs)
Incr. Vol.
(cf)
Incr. Time
(sec)
5.600
294040
1.657
5.500
243638
1.453
1.555
50402
32410
5.400
193763
1.216
1.335
49875
37372
5.300
144437
0.880
1.048
49327
47065
5.200
95682
0.479
0.680
48754
71732
5.100
47527
0.169
0.324
48155
148508
5.000
0
0.000
0.085
47527
561132
Drawdown Time = 3.90 days
This increment dropped
since Flow will not equal zero
By comparison, if calculated by the average head over the orifice (assuming
average head is half the total depth), the result would be:
Average driving head on orifice = 0.133 feet
Orifice composite loss coefficient = 0.600
X-Sectional area of 6 - 4" inverted siphons = 0.524 ftZ
Q = 0.9205 cfs
Drawdown Time = Volume / Flowrate / 86400 (sec/day)
Drawdown Time = 3.70 days
Conclusion : Use 6 - 4" Diameter PVC Inverted Siphons to drawdown the accumulated
volume from the 1.5 " storm runoff, with a required time of about 3.8 days.
SIPHONS.XLS

THE JOHN R. McADAMS COMPANY, INC.
P.O. Box 14005
Research Triangle Park, North Carolina 27709
��� [phone] Fax [phone]
/� /n � PAC
I OF
J R McA JOB NO. (�A - Q4OZr0 DATE 01 t 1 OIS BY PAC CHECKED BY
(Date)
CLIENT ,,�� PROJECT
SUBJECT 1"�+ Ll — G� TI �'U CA(XS
QNto � iz,OFr * Z.9 FT * Co.OFT = Z00.8 GF I m'Z-2-
vivo F'r cF 'DISP1.ACr:;V WkW- ` ZC`3 ,9 Cr- �+ 6Z.4 ('GG 13, 030
(,ON&e'a S auoyAwr weG++-T = I. I (1!, 03D.as� _ 14, �3o Las.
CcNOtecm &JogA,- T WT, MUST' = 194, 3301.P,5 .
pr)(� Pr) 4- (7,4 er) Pr)] Pr cP
C 51�c-ricrJ A -A .
�(3,°I ssr��l�r� + (q,o�r�llr-�� + �"1,4r✓rxlr�� + �l�,o��(l cr� +��,o��o,sPr��
14 M PT = 351.6 cr-
ToTAt, Ccrx. VGuurn� z 460 G6
,bvcT k.sr wck'r = — 67Z14?r.F) 4Z,1 co I es ,
4?1ioo 1.B5 > 1413301'as / 0y-
WT,I:�T De�J Ics IS 5ipraL5 A6 ye'=(ediEb

THE JOHN R. McADAMS COMPANY, INC.
P.O. Box 14005
Research Triangle Park, North Carolina 27709
[phone] Fax [phone]
• Q PAGE J-- OF
J R McA JOB NO. TA - Q 14 0 z1) DATE I `� BY DAC CHECKED BY
(Dale)
CLIENT PROJECT
SUBJECT
i A P-(P- SAP DISS(PAV- IS NOT PF-NIIJG 47 11.
PIPE D4(g Fj?aM 'Dis RED, THE RDNCU� IS -WrT
TN-C FIDE IS PAz; PgL.-j - v-upM;RGM AT r�f Fiof-NAI< Pwu
of Lne-E. -IW- STANDING WA[D?- OF
I-1 a0�5HDS CAS Ace AS A M-T Snwt.►U BAS14 t
5ug5n Tuj)W-, 'FbQ A RiP- P-lkP DISS I PMI;v—p ApROO.

u
10 Year (Lots 100 % Imp.)
Chalnsaw Routing Method
Project Name:
New Pond at Horseshoe Lake
Project #:
LFA-94020
Date :
8/24/95
Operator:
DAC
Title :
10 Year Storm
The John R. McAdams Company
P.O. Box 14005
Research Triangle Park, NC 27709
Weir Box I Barrel:
Hydrograph:
N barrels =
2.00
Dp = 450.0 CFS
Opening H
2.00 feet
Tp = 68.8 minutes
Opening L =
12.00 feet
dT= 4.0 minutes
Cw=
3.00
Zcr=
6.00 feet
Stage -Storage:
Barrel Dia. =
24.00 inches
Ks = 358260.0
Barrel Inv. =
3.60 feet
b = 1.210
Cd =
0.65
Zo= 3.5 feel
Orifice:
Initial Water Level :
N =
0,00
Zi = 5.0 feet
D =
0.00 inches
Cd =
0.00
Computed Results:
Invert=
0,00 feet
Normal Surf. Area = 472023. SF
Max. Surf, Area = 601498. SF
Weir 1:
Peak Elev. = 8.26 feet
L =
50.00 feet
Peak Stage = 4.8 feet
Za =
8.60 feet
Peak Outflow = 122.11 CFS
Sideslcpe =
10.00
Volume Stored = 1779847.0 its
Weir 2:
L =
0.00 feet
Zcr=
0.00 feet
Cw =
0.00
4500 System Loading and Response
Ieilaw
400.0
-
0Ufflc
350.0
300 0
--^50.0
-
;200.0
150.0
100.0
50.0
0.0
00 we Iwo 150.0 2000.
Time (min)
Time
min
Inflow
cfs
Storage
(it
Stage
fijets)
Outflow
Opening (W)
ch)
Opening (0)
cfs
Barrel
cfs)
Orifice
cfs)
Weir 1
(cfs)
Weir 2
(cfs)
0.0
0.0
585152.1
5.0
0.00
0.00
0.00
0.00
0.00
0.00
0.00
4.0
3.7
585152.1
5.0
0.00
0.00
0.00
0.00
0.00
0.00
0.00
8.0
14.8
586050.3
5.0
0.00
0.00
0.00
0.00
0.00
0.00
0.00
12.0
32.9
589613.5
5.0
0.00
0.00
0.00
0.00
0.00
0.00
0.00
16.0
57.4
597519.4
5.0
0.00
0.00
0.00
0.00
0.00
0.00
0.00
20.0
87.5
611301.7
5.1
0.00
0.00
0.00
0.00
0.00
0.00
0.00
24.0
122.1
632298.3
5.1
0.00
0.00
0.00
0.00
0.00
0.00
0.00
28.0
160.2
661607.3
5.2
0.00
0.00
0.00
0.00
0.00
0.00
0.00
32.0
200.4
700049.9
5.2
0.00
0.00
0.00
0.00
0.00
0.00
0.00
36.0
241.4
748143.9
5.3
0.00
0.00
0.00
0.00
0.00
0.00
0.00
40.0
281.9
806085.6
5.5
0.00
0.00
0.00
0.00
0.00
0.00
0.00
44.0
320.5
873744.0
5.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
48.0
355.9
950664.7
5.7
0.00
0.00
0.00
0.00
0.00
0.00
0.00
52.0
387.0
1036085.1
5.9
0.00
0.00
0.00
0.00
0.00
0.00
0.00
56.0
412.6
1128959.8
6.1
0.85
0.85
0.00
79.80
0.00
0.00
0.00
60.0
432.1
1227792.6
6.3
4.98
4.98
0.00
84.64
0.00
0.00
0.00
64.0
444.6
1330295.9
6.5
11.13
11.13
0.00
89.32
0.00
0.00
0.00
68.0
449.8
1434333.8
6.6
18.73
18.73
0.00
93.78
0.00
0.00
0.00
72.0
447.6
1537801.5
6.8
27.39
27.39
0.00
97.96
0.00
0.00
0.00
76.0
437.9
1638652.0
7.0
36.71
36.71
14.34
101.82
0.00
0.00
0.00
80,0
421.2
1734949.1
7.2
46.31
46.31
53.54
105.34
0.00
0.00
0.00
84.0
397.9
1824924.3
7.3
55.84
55.84
73.00
108.50
0.00
0.00
0.00
88,0
370.3
1907028.6
Z5
64.97
64.97
86.94
111.28
0.00
0.00
0.00
02.0
343.3
1980309.9
7.6
73.43
73.43
97.64
113.69
0.00
0.00
0.00
96.0
318.4
2045091.1
7.7
81.14
81.14
106.16
115.76
0.00
0.00
0.00
100.0
295.2
2102022.1
7.8
88.09
88.09
113.08
117.55
0.00
0.00
0.00
104,0
273.7
2151722.8
7.9
94.29
94,29
118.77
119.07
0.00
0.00
0.00
108.0
253.8
2194779.6
8.0
99.75
99.75
123.47
120.38
0.00
0.00
0.00
112.0
235.3
2231744.7
8.0
104.50
104.50
127.35
121.48
0.00
0.00
0.00
116.0
218.2
2263135.7
8.1
108.58
108.58
130.55
122.41
0.00
0.00
0.00
120.0
202.3
2289436.2
8.1
112.03
112.03
133.17
123.18
0,00
0.00
0.00
124.0
187.6
2311096.6
8.2
114.90
114.90
135.28
123.81
0,00
0.00
0.00
128.0
473.9
2328535.3
8.2
117.22
117.22
136.96
124.31
0.00
0.00
0.00
132.0
161.2
2342140.3
8.2
119.04
119.04
138.25
124.70
0,00
0.00
0.00
138.0
149.5
2352270.3
8.2
120.40
120.40
139.20
124.99
0.00
0.00
0.00
POND100%.XLS

10 Year (Lots 100% Imp.)
Time
min
Inflow
cfs
Storage
fA3)
Stage
ftl
Outflow
cfs
Opening (W)
cfs
Opening (0)
cfs)
Barrel
cfs)
Orifice
(cfs)
Weir 1
cfs)
Weir 2
(cfs
140,0
138.6
2359257.0
8.2
121.34
121.34
139.85
125.19
0.00
0.00
0.00
144.0
128.5
2363406.1
8.3
121.90
121.90
140.24
125.31
0.00
0.00
0.00
148.0
119.2
2364999.1
8.3
122.11
122.11
140.39
125.36
0.00
0.00
0.00
152.0
110.5
2364294.9
8.3
122.02
122.02
140.32
125.34
0.00
0.00
0.00
158.0
102.5
2361531.3
8.3
121.64
121.64
140.07
125.26
0.00
0.00
0,00
160.0
95.0
2356926.7
8.2
121.02
121.02
139.64
125.13
0.00
0.00
0.00
164.0
88.1
2350680.8
8.2
120.18
120.18
139.05
124.95
0.00
0.00
0.00
168.0
81.7
2342976.7
8.2
119.15
119.15
138.33
124.73
0.00
0.00
0.00
172.0
75.7
2333981.7
8.2
117.95
117.95
137.48
124.47
0.00
0.00
0.00
176.0
70.2
2323848.8
8.2
116.59
116.59
136.51
124.18
0.00
0.00
0.00
180.0
65.1
2312717.4
8.2
115.11
115.11
135.44
123.86
0.00
0.00
0.00
184.0
60.4
2300714.6
8.2
113.52
113.52
134.27
123.51
0.00
0.00
0.00
188.0
56.0
2287956.2
8.1
111.84
111.84
133.02
123.14
0.00
0.00
0.00
192.0
51.9
2274547.4
8.1
110.08
110.08
131.70
122.74
0.00
0.00
0.00
196.0
48.1
2260583.9
8.1
108.25
108.25
130.30
122.33
0,00
0.00
0.00
200.0
44.6
2246152.3
8.1
106.37
106.37
128.83
121.91
0.00
0.00
0.00
204.0
414
2231331.4
6.0
104.45
104.45
127.31
121.47
0.00
0.00
0.00
206.0
38.4
2216192.3
8.0
102.49
102.49
125.74
121.02
0.00
0.00
0.00
212.0
35.6
2200799.2
8.0
100.52
100.52
124.11
120.56
0.00
0.00
0.00
216.0
33.0
2185210.1
8.0
98.53
98.53
122.44
120.09
0.00
0.00
0.00
220.0
30.6
2159477.4
7.9
96.53
96.53
120.73
119.61
0.00
0.00
0.00
224.0
28.3
2153647.9
7.9
94.53
94.53
14.99
119.13
0.00
0.00
0.00
228.0
26.3
2137763.9
7.9
92.54
92.54
117.20
118.65
0.00
0.00
0.00
232.0
24.4
2121863.2
7.8
90.55
90.55
115.39
118.16
0.00
0.00
0.00
236.0
22.6
2105979.4
7.8
88.58
88.58
113.55
117.67
0.00
0.00
0.00
240.0
21.0
2090142.7
7.8
86.63
86.63
111.68
117.18
0.00
0.00
0.00
244.0
19.4
2074379.8
7.8
84.70
84.70
109.78
116.68
0.00
0.00
0.00
248.0
18.0
2056714.4
7.7
B2.79
82.79
107.86
116.19
0.00
0.00
0.00
252.0
16.7
2043167.4
7.7
80.91
80.91
105.92
115.70
0.00
0.00
0,00
256.0
15.5
2027757.2
7.7
79.06
79.06
103.95
115.21
0.00
0.00
0.00
260.0
14.4
2012499.9
7.7
77.23
77.23
101.97
114.73
0.00
0.00
0.00
264.0
13.3
1997409.5
7.6
75.44
75.44
99.97
114.24
0.00
0.00
0.00
268.0
12.3
1982498.1
7.6
73.69
73.69
97.94
113.76
0.00
0.00
0.00
272.0
11.4
1967776.1
7.6
71.96
71.96
95.00
113.28
0.00
0.00
0.00
276.0
10.6
1953252.4
7.6
70.27
70.27
93.84
112.81
0.00
0.00
0.00
280.0
9.8
1938934.4
7.5
68.62
68.62
91.76
112.34
0.00
0.00
0.00
284.0
9.1
1924828.1
7.5
67.00
67.00
89.66
111.87
0.00
0.00
0.00
288.0
8.5
1910938.8
7.5
65.41
65.41
87.55
111.41
0.00
0.00
0.00
292.0
7.8
1897270.2
7.5
63.86
63.86
85.41
110.96
0.00
0.00
0.00
296.0
7.3
1883825.5
7.4
62.35
62.35
83.25
110.50
0.00
0.00
0.00
300.0
6.7
1870606.9
7.4
60.87
60.87
81.07
110.06
0.00
0.00
0.00
304.0
6.3
1857615.9
7.4
59.43
59.43
78.86
109.62
0.00
0.00
0.00
308.0
5.8
1844853.2
7.4
58.02
58.02
76.63
109.18
0.00
0.00
0.00
312.0
5.4
1832319.1
7.4
56.65
56.65
74.37
108.75
0.00
0.00
0.00
316.0
5.0
1820013.1
7.3
55.31
55.31
72.08
108.33
0.00
0.00
0.00
320.0
4.6
1807934.5
7.3
54.01
54.01
69.76
107.91
0.00
0.00
0.00
324.0
4.3
1796082.0
7.3
52.73
52.73
67.40
107.50
0.00
0.00
0.00
328.0
4.0
1704454.1
7.3
51.50
51.50
64.99
107.10
0.00
0.00
0.00
332.0
3.7
1773048.7
7.2
50.29
50.29
62.55
106.69
0.00
0.00
0.00
336.0
3.4
1761863.7
7.2
49.11
49.11
60.04
106.30
0.00
0.00
0.00
340.0
3.2
1750896.6
7.2
47.97
47.97
57.48
105.91
0.00
0.00
0.00
344.0
2.9
1740144.8
7.2
46.85
46.85
54.86
105.53
0.00
0.00
0.00
348.0
2.7
1729605.2
7.2
45.77
45.77
52.15
105.15
0.00
0.00
0.00
352.0
2.5
1719275.0
7.2
44.71
44.71
49.35
104.78
0.00
0.00
0.00
356.0
2.3
1709150.9
7.1
43.68
43.68
46.43
104.41
0.00
0.00
0.00
360.0
2.2
1699229.7
7.1
42.68
42.68
43.39
104.06
0.00
0.00
0.00
364.0
2.0
1689508.0
7.1
41.70
41.70
40,18
103.70
0.00
0.00
0.00
368.0
1.9
1679982.5
7.1
40.75
40.75
38.75
103.35
0.00
0.00
0.00
372.0
1.7
1670649.5
7.1
39.83
39.83
33.06
103.01
0.00
0.00
0.00
376.0
1.6
1661505.5
7.1
38.93
38.93
28.97
102,67
0.00
0.00
0.00
380.0
1.5
1652547.1
7.0
38.06
38.06
24.31
102.34
0.00
0.00
0.00
384.0
14
1843770.5
7.0
37.20
37.20
18.65
102.01
0.00
0.00
0.00
388.0
1.3
1635172.4
7.0
36.38
36.38
10.44
101.69
0.00
0.00
0.00
392.0
1.2
1626749.0
7.0
35.57
35.57
0.00
101.38
0.00
0.00
0.00
396.0
1.1
1618496.7
7.0
34.78
34.78
0.00
101.07
0.00
0.00
0.00
400.0
1.0
1610412.2
7.0
34.02
34.02
0.00
100.76
0.00
0.00
0.00
404.0
0.9
1602491.7
6.9
33.28
3328
0.00
100,46
0.00
0.00
0.00
408.0
0.9
1594731.9
6.9
32.55
32.55
0.00
100.16
0.00
0.00
0.00
POND100%.XLS

10 Year (Lots 100 % Imp.)
Time
min
Inflow
cfs
Storage
ft"3
Stage
fl)
Outflow
(cfs)
Opening (W)
cf!
Opening (0)
(cfs)
Barrel
(cfs
Orifice
(cfs)
Weir 1
(cfs)
Weir 2
cfs
412.0
0.8
1587129.3
6.9
31.65
31.85
0.00
99.87
0.00
0.00
0.00
416.0
0.8
1579680.4
6.9
31.16
31.16
0.00
99.59
0.00
0.00
0.00
420.0
0.7
1572381.9
6.9
30.50
30.50
0.00
99.31
0.00
0.00
0.00
424.0
0.6
1565230.5
6.9
29.85
29.85
0.00
99.03
0.00
0.00
0.00
428.0
0.6
1558222.9
6.9
29.21
29.21
0.00
98.76
0.00
0.00
0.00
432.0
0.6
1551355.9
6.9
28.60
28.60
0.00
98.49
0.00
0.00
0.00
436.0
0.5
1544626.3
6.8
28.00
28.00
0.00
90.23
0.00
0.00
0.00
440.0
0.5
1538031.0
6.8
27.41
27.41
0.00
97.97
0.00
0.00
0.00
444.0
0.4
1531566.9
6.8
26.84
26.84
0.00
97.71
0.00
0.00
0.00
448.0
0.4
1525231.1
6.8
26.29
26.29
0.00
97.46
0.00
0.00
0.00
452.0
0.4
1519020.6
6.8
25.75
25.75
0.00
97.22
0.00
0.00
0.00
456.0
0.4
1512932.5
6.8
25.22
25.22
0.00
96.98
0.00
0.00
0.00
460.0
0.3
1506964.1
6.8
24,71
24.71
0,00
96.74
0.00
0.00
0.00
464.0
0.3
1501112.5
6,8
24.21
24.21
0.00
96.50
0.00
0.00
0.00
468.0
0.3
1495375.1
6.8
23.72
23.72
0.00
96.27
0.00
0.00
0.00
472.0
0.3
1489749.3
6.7
23.25
23.25
0.00
96.05
0.00
0.00
0.00
476.0
0.2
1484232.3
6.7
22.79
22.79
0.00
95.82
0.00
0.00
0.00
480.0
0.2
1478821.8
6.7
22.34
22.34
0.00
95.61
0.00
0.00
0.00
484.0
0.2
1473515.3
6.7
21.90
21.90
0.00
95.39
0.00
0.00
0.00
488.0
0.2
1468310.3
6.7
21.47
21.47
0.00
95.18
0,00
0.00
0.00
492.0
0.2
1463204.5
6.7
21.05
21.05
0.00
94.97
0.00
0.00
0.00
496.0
0.2
1458195.6
6.7
20.64
20.64
0.00
94.76
0.00
0.00
0.00
500.0
0.2
1453281.4
6.7
20,24
20.24
0.00
04.56
0.00
0.00
0.00
504.0
0.1
1448459.7
6.7
19.86
19.86
0.00
94.36
0.00
0.00
0.00
508.0
0.1
1443728.3
6.7
19.48
19.48
0.00
94.17
0.00
0.00
0.00
512.0
0.1
1439085.2
6.7
19.11
19.11
0.00
93.98
0.00
0.00
0.00
516.0
0.1
1434528.3
6.6
18.75
18.75
0.00
03.79
0.00
0.00
0.00
520.0
0.1
1430055.7
6.6
18.40
18.40
0.00
93.60
0.00
0.00
0.00
524.0
0.1
1425665.4
6.6
18.06
18.06
0.00
93.442
0.00
0.00
0.00
528.0
0.1
1421355.E
6.fi
17.72
17.72
0.00
93.24
0.00
0.00
0.00
532.0
0.1
1417124.4
6.6
17.39
17.39
0.00
93.0E
0.00
0.00
0.00
POND100%.XLS

HS Q 10 Year, 100 % Imp.
Chalnsaw Routing Method
Project Name:
New Pond at Horseshoe Lake
Project p:
LFA-94020
Date:
8/24/95
Operator:
DAC
Title:
10 Year Storm -- Horseshoe Lake
Weir Box / Barrel:
Hydrograph:
N barrels =
Op =
N/A US
Opening H
Tip =
N/A minutes
Opening L =
dT=
N/A minutes
Cw=
Zcr =
Stage -Storage :
Barrel Dia. _
Ks = 292794.0
Barrel Inv. _
b= 1.194
Cal=
Zo =
3.6 feet
Orifice:
Initial Water Level :
N =
Zi =
3.6 feet
D =
Cal =
Computed Results:
Invert =
Normal Surf. Area =
0. SF
Max. Surf. Area =
412764. SF
Weir 1:
Peak Elev. =
5.95 feet
L =
Peak Stage =
2.4 feet
Zcr =
Peak Outflow =
89.34 CFS
Cw =
Volume Stored =
813820.3 it'
Weir 2:
L=
Zcr =
Cw =
The John R. McAdams Company
P.O. Box 14005
Research Triangle Park, NC 27709
0.00
0.00 feet
0.00 feet
0.00
0.00 feet
0.00 inches
0.00 feet
0.00
1.00
27.00 inches
0.60
3.50 feet
265.00 feet
5.00 feel
2.68
150.00 feel
5,80 feet
2.68
140.0 System Loading and Response
InAax
120.0 outflow
Iwo
80.0
3 60,0
u 40.0
20.0
00
0.0 IWO 200.0 300.0 400.0 500.0 600.0
Tlme (min)
Time
min)
Inflow
(cfs)
Storage
(ft"3
Stage
)fl)
Outflow
cfs)
Opening )W)
cfa
Opening )O)
cfs
Barrel
cfs
Orifice
cfs)
Weir 1
(cfs)
Weir 2
cfs
0.0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
4.0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
8,0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
12.0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
16.0
0.0
0.0
3.8
0.00
0.00
0.00
0.00
0.00
0.00
0.00
20.0
0.0
0.0
3.8
0.00
0.00
0,00
0.00
0.00
0.00
0.00
24.0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
28.0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
32.0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
36.0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
40.0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
44.0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
48.0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
52.0
0.0
0.0
3.6
0.00
0.00
0.00
0,00
0.00
0.00
0.00
56.0
0.8
0.0
3.6
0.19
0.00
0.00
0.00
0.19
0.00
0.00
60.0
5.0
157.4
3.6
0.20
0.00
0.00
0.00
0.20
0.00
0.00
64.0
11.1
1305.8
3.6
0.22
0.00
0.00
0.00
0.22
0.00
0.00
68.0
18.7
3922.7
3.6
0.27
0.00
0.00
0.00
0.27
0.00
0.00
72.0
27.4
8353.5
3.7
0.35
0.00
0.00
0.00
0.35
0.00
0.00
76.0
36.7
14842B
3.7
0.47
0.00
0,00
0.00
0.47
0.00
0.00
80.0
46.3
23540.8
3.7
0.63
0.00
0.00
0.00
0.63
0.00
0.00
84.0
55.8
34506.0
3.8
0.83
0.00
0.00
0.00
0.83
0.00
0.00
88.0
65.0
47709.3
3.8
1.08
0.00
0,00
0.00
1.08
0.00
0.00
92.0
73.4
63041.2
3.9
1.39
0.00
0.00
0.00
1.39
0.00
0.00
96.0
01.1
80330.1
3.9
1.75
0.00
0.00
0,00
1.75
0.00
0.00
100.0
88A
99384.4
4.0
2.16
0.00
0.00
0.00
2.16
0,00
0.00
104.0
94.3
120008.6
4.1
2.62
0.00
0.00
0.00
2.62
0.00
0.00
108.0
99.7
142009.4
4.1
3.13
0.00
0.00
0.00
3.13
0.00
0.00
112.0
104.5
105198.7
4.2
3.68
0.00
0.00
0.00
3.68
0.00
0.00
116.0
108.6
189396.5
4.3
4.27
0.00
0.00
0.00
4.27
0.00
0.00
120.0
112.0
214432.2
4.4
4.89
0.00
0.00
0.00
4.89
0.00
0.00
124.0
114.9
240145.9
4.4
5.55
0.00
0.00
0.00
5.55
0.00
0.00
128.0
117.2
266388.6
4.5
6.24
0.00
0.00
0.00
6.24
0.00
0.00
132.0
119.0
293022.8
4.6
6.96
0.00
0.00
0.00
6.96
0,00
0.00
136.0
120.4
319921.8
4.7
7.70
0.00
0.00
0.00
7.70
0.00
0.00
POND100%.XLS

HS ® 10 Year, 100 % Imp,
Time
min
Inflow
(cfs)
Storage
(ft"3)
Stage
ft)
Outflow
cfs)
Opening (W)
cfs
Opening (0)
cfs
Barrel
cfs)
Ori0ce
(cfs)
Weir 1
(CIS)
Weir 2
(CIS)
140.0
121.3
346970.3
4.8
8.45
0.00
0.00
0.00
8.45
0.00
MCI
144.0
121.9
374063.1
4.8
9.22
0.00
0.00
0.00
9.22
0.00
0.00
148.0
122.1
401105.5
4.9
10.00
0.00
0.00
0.00
10.00
0.00
0.00
152.0
122.0
428012.2
5.0
10.79
0.00
0.00
0.00
10.79
0.00
0.00
156,0
121.8
454706.8
5.0
11.58
0.00
0.00
0.00
11.58
0.00
0.00
160.0
121.0
481121.6
5.1
12.38
0.00
0.00
0.00
12.38
0.00
0.00
164.0
120.2
5071965
5.2
13,17
0.00
0.00
0.00
13.17
0.00
0.00
168.0
119.2
532879.1
5.3
13,97
0.00
0.00
0.00
13.97
0.00
0.00
172.0
117.9
558123.2
5.3
14.75
0.00
0.00
0.00
14.75
0.00
0.00
176.0
116.6
582889.4
5.4
15.54
0.00
0.00
0.00
15.54
0.00
0.00
180.0
115.1
607143.6
5.4
16.31
0.00
0,00
0.00
16.31
0.00
0.00
184.0
143.5
630857.0
5.5
17.07
0.00
0.00
0.00
17.07
0,00
0.00
188.0
111.8
654005.6
5.6
17.82
0.00
0.00
0.00
17.82
0.00
0.00
192.0
110.1
676569.9
5.6
18.56
0.00
0.00
0.00
18.56
0.00
0.00
196.0
108.2
698533.9
5.7
19.28
0.00
0.00
0.00
19.28
0.00
0.00
200.0
106.4
719885.6
5.7
19.99
0.00
0.00
0.00
19.99
0.00
0.00
204.0
104.4
740615.8
5.8
20,50
0.00
0.00
0,00
20.50
0.00
0.00
208.0
102.5
760762.5
5.8
25.31
0.00
0.00
0,00
20.94
2.79
1.58
212.0
100.5
779287.4
5.9
42.01
0.00
0.00
0.00
21.33
13.20
7.47
216.0
98.5
793330.2
5.9
59.13
0.00
0.00
0.00
21.62
23.95
13.56
220.0
96.5
802785.0
5.9
72.37
0.00
0.00
0.00
21.81
32.28
18.27
224.0
94.5
808583.3
5.9
81.09
0.00
0.00
0.00
21.93
37.78
21.38
228.0
92.5
811808.7
5.9
86.13
0.00
0.00
0.00
22.00
40.95
23.18
232.0
90.6
813346.3
6.0
88.58
0.00
0.00
0.00
22.03
42.50
24.05
236.0
88.8
813820.3
6.0
89.34
0.00
0.00
0.00
22.04
42.98
24,33
240.0
86.8
813639.0
6.0
89.05
0.00
0.00
0.00
22.03
42.79
24.22
244.0
84.7
813059.0
6.0
88.12
0.00
0.00
0.00
22.02
42.21
23.89
246.0
82.8
812238.3
6.0
86.81
0.00
0.00
0.00
22.00
41.38
23.42
252.0
80.9
811273.5
5.9
85.29
0.00
0.00
0.00
21.99
40,42
22.88
258.0
79.1
810223.4
5.9
83.64
0.00
0.00
0.00
21.96
39.38
22.29
260.0
77.2
809124.0
5.9
81.93
0.00
0.00
0.00
21.94
38.30
21.58
264.0
75.4
807997.7
5.9
80,19
0.00
0.00
0.00
21.92
37.21
21.06
268.0
73.7
806858.2
5.9
78.45
0.00
0.00
0.00
21.90
36.11
20.44
272.0
72.0
805714.3
5.9
76.72
0.00
0.00
0.00
21.87
35.02
19.82
276.0
70.3
804571.7
5.9
75.01
0.00
0.00
0.00
21.85
33.95
19.21
280.0
68,6
803434.1
5.9
73.32
0.00
0.00
0.00
21.83
32.88
18.61
284.0
67.0
802303.9
5.9
71.67
0.00
0.00
0.00
21.80
31.84
18.02
28B.0
65.4
801183.0
5.9
70.04
0.00
0.00
0.00
21.78
30.82
1744
292.0
63.9
800072.4
5.9
68.44
0.00
0.00
0.00
21.76
29.81
16.87
296.0
62.3
798973.0
5.9
66.88
0.00
0.00
0.00
21.74
28.83
16.32
300.0
60.9
797885.6
5.9
65.35
0.00
0.00
0.00
21.71
27.87
15,77
304.0
59.4
796810.5
5.9
63.86
0.00
0.00
0.00
21.69
26.92
15.24
308.0
58.0
795748.0
5.9
62.40
0,00
0.00
0.00
21.67
26.01
14.72
312.0
56.6
794698.5
5.9
60.97
0.00
0.00
0.00
21.65
25.11
14.21
316.0
55.3
793662.0
5.9
59.58
0.00
0.00
0.00
21.63
24.23
13.72
320.0
54.0
792638.7
5.9
58.21
0.00
0.00
0.00
21.61
23.38
13.23
324.0
52.7
791628.6
5.9
56.89
0.00
0.00
0.00
21.59
22.54
12.76
328.0
51.5
790631.8
5.9
55,59
0.00
0.00
0.00
21.56
21.73
12.30
332.0
50.3
789648.1
5.9
54.33
0.00
0.00
0.00
21.54
20.94
11.85
33S.0
49.1
788677.6
5.9
53.10
0.00
0.00
0.00
21.52
20.16
11.41
340.0
48.0
787720.1
5.9
51.90
0.00
0.00
0.00
21.50
19.41
10.99
344.0
46.9
786775.5
5.9
50.73
0,00
0.00
0.00
21.49
18.68
10.57
348,0
45.8
785843.6
5.9
49.60
0.00
0.00
0.00
21.47
17.96
10.17
352.0
44.7
784924.4
5.9
48.49
0.00
0.00
0.00
21.45
17.27
9,77
356.0
43.7
784017.5
5.9
47.41
0.00
0.00
0.00
21.43
16.59
9.39
360.0
42.7
783122.9
5.9
46.35
0.00
0.00
0.00
21.41
15.93
9.02
364.0
41.7
782240.2
5.9
45.33
0.00
0.00
0.00
21.39
15.29
8.65
368.0
40.8
781369.3
5.9
44.33
0.00
0.00
0.00
21.37
14.66
8.30
372.0
39.8
780509.9
5.9
43.36
0.00
0.00
MCI
21.35
14.05
7.95
376.0
38.9
779661.8
5.9
42.42
0.00
0.00
0.00
21.34
13.46
7.62
380.0
38.1
778824.7
5.9
41.50
0.00
0.00
0.00
21.32
12.89
7.29
384.0
37.2
777998.3
5.9
40.60
0.00
0.00
0.00
21.30
12.33
6.98
388.0
36.4
777182.3
5.9
39.73
0.00
0.00
0.00
21.29
11.78
6.67
392.0
35.6
776378.5
5.9
38.89
0,00
0.00
0.00
21.27
11.25
6.37
396.0
34.8
775580.5
5.9
38.06
0,00
0.00
0.00
21.25
10.73
6.OB
400.0
34.0
774794.1
5.9
37.26
0.00
0.00
0.00
21.24
10.23
5.79
404.0
33.3
774017.0
5.9
36.48
0.00
0.00
0.00
21.22
9.74
5.52
408.0
32.6
773248.7
5.9
35.72
0.00
0.00
0.00
21.20
9.27
5.25
POND100%.XLS

HS @ 10 Year, 100 % Imp.
2 %2,
Time
min
Inflow
ch
Storage
ft'J(it)
Stage
Outflow
cfsl
Opening (W)
chi
Opening (0)
cfs
Barrel
ch
Orifice
cfs)
Weir 1
(cfs)
Weir 2
cfs)
412.0
31.8
772489.0
5.9
34.98
0.00
0.00
0.00
21.19
8.81
4.99
416.0
31.2
771737.E
5.9
34.26
0.00
0.00
0.00
21.17
8.36
4.73
' 420.0
30.5
770994.1
5.8
33.56
0.00
0.00
0.00
21.16
7.92
4.48
424.0
29.8
770258.2
5.8
32.88
0.00
0.00
0.00
21.14
7.50
4.24
428.0
29.2
769529.5
5.8
32.22
0.00
0.00
0.00
21.12
7.09
4.01
432.0
28.6
768807.6
5.8
31.58
0.00
0.00
0.00
21.11
6.69
3.78
436.0
28.0
768092.1
5.8
30.95
0.00
0.00
0.00
21.09
6.30
3.56
440.0
27.4
767382.7
5.8
30.34
0.00
0.00
0.00
21.08
5.92
3.35
444.0
26.8
766678.9
5.8
29.75
0.00
0.00
0.00
21.06
5.55
3.14
448.0
26.3
765980.4
5.8
29.18
0.00
0.00
0.00
21.05
5.19
2.94
452.0
25.7
765286.6
5.8
28.62
0.00
0.00
0.00
21.03
4.84
2.74
456.0
25.2
764597.2
5.8
28.08
0.00
0.00
0.00
21.02
4.51
2.55
460.0
24.7
763911.6
5.8
27.55
0.00
0.00
0.00
21.00
4.18
2.37
464.0
24.2
783229.3
5.8
27.04
0.00
0.00
0.00
20.99
3.86
2.19
488.0
23.7
782549.8
5.8
26.55
0.00
0.00
0.00
20.98
3.56
2.01
472.0
23.2
761872.5
5.8
26.06
0.00
0.00
0.00
20.96
3.26
1.84
478.0
22.8
761196.8
5.8
25.60
0.00
0.00
0.00
20.95
2.97
1.68
480.0
22.3
760521.9
5.8
25.15
0.00
0.00
0.00
20.93
2.69
1.52
484.0
21.9
759847.3
5.8
24.71
0.00
0.00
0.00
20.92
2.42
1.37
488.0
21.5
759172.0
5.8
24.29
0.00
0.00
0.00
20.90
2.16
1.22
492.0
21.0
758495.2
5.8
23.88
0.00
0.00
0,00
20.89
1.91
1.08
496.0
20.6
757815.9
5.8
23.25
0.00
0.00
0.00
20.64
1.67
0.94
500.0
20.2
757188.8
5.8
22.52
0.00
0.00
0.00
20.24
1.4E
0.82
504.0
19.9
756641.7
5.8
21.86
0.00
0.00
0.00
19.86
1.28
0.72
508.0
19.6
756181.3
5.8
21.25
0.00
0.00
0.00
19.48
1.13
0.64
512.0
19.1
755737.2
5.8
20.68
0.00
0.00
0.00
19.11
1.00
0.57
518.0
18.7
755360.7
5.8
20.15
0.00
0.00
0.00
18.75
0.89
0.51
520.0
18.4
755024.9
5.8
19.65
0,00
0.00
0.00
18.40
0.80
0.45
524.01
18.11
754724.1
5.8
19.18
0.00
0.00
0.00
18.0E
0.72
0.41
528.0
17.7
754453.4
5.8
18.74
0.00
0.00
0.00
17.72
0.65
0.37
532.0
17.4
754209.1
5.8
18.32
0.00
0.00
0.00
17.39
0.59
0.33
POND100%.XLS

T
25 Year (Lots 100% Imp.)
Z Z
Chainsaw Routing Method
Project Name:
New Pond at Horseshoe Lake
Project is
LFA-94020
Date :
8/24/95
Operator:
DAC
Title:
25 Year Storm
The John R. McAdams Company
P.O. Box 14005
Research Triangle Park, NC 27709
Weir Box / Barrel:
Hydrograph:
N barrels =
2.00
Op = 630.0 CFS
Opening H
2.00 feet
Tip = 75.1 minutes
Opening L =
12.00 feet
dT= 4.0 minutes
Cw=
3.00
Zcr=
6.00 feet
Stage -Storage:
Barrel Dia. =
24.00 inches
Ks = 358260.0
Barrel Inv. =
3.60 feel
b = 1.210
Cd =
0.65
Zo= 3.5 feet
Orifice:
Initial Water Level:
N=
0.00
Zi = 5.0 feet
D =
0.00 inches
Cd =
0.00
Computed Results :
Invert =
0.00 feet
Normal Surf. Area = 472023. SF
Max. Surf. Area = 617637, SF
Weir 1:
Peak Elev. = 8.90 feet
L =
50.00 feet
Peak Stage= 5.4 feet
Zcr=
8.60 feet
Peak Outflow = 163.11 CFS
Sideslope=
10.00
Volume Stared = 2169628.8 ft1
Weir 2:
L =
0.00 feet
Zcr=
0.00 feet
Cw =
0.00
600,0 System Loading and Response
Innaw
500.0 - Outflow
400.0
Z300 a
3
0
200 0
100.0
00
0.0 50.0 100.0 150.0 200.0
Time (min)
Time
(min)
Inflow
cfs)
Storage
ftA3)
Stage
tt)
Outflow
(cfs)
Opening (W)
(cfs)
Opening (0)
cfs)
Barrel
Orifice
(cfs)
Weir 1
cfs)
Weir 2
cfs
0.0
0.0
585152.1
5.0
0.00
0.00
0.00
0.00
0.00
0.00
0.00
4.0
3.7
685152.1
5.0
0.00
0.00
0.00
0.00
0.00
0.00
0.00
8.0
14.7
586040.4
5.0
0.00
0.00
0.00
0.00
0.00
0.00
0,00
12.0
32.7
589568.7
5.0
0.00
0.00
0.00
0.00
0.00
0.00
0.00
16.0
57.2
597415.1
5.0
0.00
0.00
0.00
0.00
0.00
0.00
0.00
20.0
87.5
611137.0
5.1
0.00
0.00
0.00
0.00
0.00
0.00
0.00
24.0
122.7
632127.5
5.1
0.00
0.00
0.00
0.00
0.00
0.00
0.00
28.0
161.9
661577.1
5.2
0.00
0.00
0.00
0.00
0.00
0.00
0.00
32.0
204.0
700439.E
5.2
0.00
0.00
0.00
0.00
0.00
0.00
0.00
36.0
247.8
749406.0
5.3
0.00
0.00
0.00
0.00
0.00
0.00
0.00
40.0
292.1
808885,1
5.5
0.00
0.00
0.00
0.00
0.00
0.00
0.00
44.0
335.6
878991.9
5.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
48.0
377.2
959544.8
5.8
0.00
0.00
0.00
0.00
0.00
0.00
0.00
52.0
415.6
1050070.2
5.9
0.00
0.00
0.00
0.00
0.00
0.00
0.00
58.0
449.8
1149816.0
6.1
1.52
1.52
0.00
80.85
0.00
0.00
0.00
60.0
478.9
1257406.9
6.3
6.59
6.59
0.00
86.03
0.00
0.00
0.00
64.0
501.9
1370752.2
6.5
13.94
13.94
0.00
91.09
0.00
0.00
0.00
68.0
518.4
1487872.7
6.7
23.09
23.09
0.00
95.97
0.00
0.00
0.00
72.0
527.8
1606746.2
7.0
33.6E
33.68
0.00
100.62
0.00
0.00
0.00
76.0
529.8
1725329.9
7.2
45.33
45.33
51.01
105.00
0.00
0.00
0.00
80.0
624.5
1841605.4
7.4
57.67
57.67
76,05
109.07
0.00
0.00
0.00
84.0
511.8
1953635.1
7.6
70.32
70.32
93.90
112.82
0.00
0.00
0.00
88.0
492.3
2059602.3
7.7
82.90
82.90
107.97
116.22
0.00
0.00
0.00
92.0
466.5
2157868.6
7.9
95.06
95.06
119.45
119.26
0.00
0.00
0.00
96.0
436.6
2247010.9
8.1
106.48
106.48
128.92
121.93
0.00
0.00
0.00
100.0
407.4
2326234,5
8.2
116,91
116.91
136.74
124.25
0.00
0.00
0.00
104.0
380.1
2395944.8
8.3
126,23
126.30
143.23
426.23
0.00
0.00
0.00
108.0
354.7
2456877.1
8.4
127.94
134.67
148.64
127.94
0.00
0.00
0.00
112.0
331.0
2511297.4
8.5
129.44
142.26
153.30
129A4
0.00
0.00
0.00
116.0
308.8
2559663.4
8.6
130.75
149.09
157.31
130.75
0.00
0.00
0.00
120.0
288.2
2602400.8
8.6
133.65
155.20
160.76
131.89
0,00
1.75
0.00
124.0
268.9
2639484.5
8.7
138.80
160.56
163.68
132.88
0.00
5.93
0,00
128.0
250,9
2670704.1
8.8
144.28
165.10
166.10
133.70
0,00
10.59
0.00
132.0
234.1
2696291.0
8.8
149.43
168.85
168.05
134.36
0.00
15.06
0.00
138.0
218.4
2716615.4
8.8
153.89
171.64
169.58
134.89
0.00
19.00
0.00
POND100%.XLS

25 Year (Lots 100 % Imp.)
Time
min)
Inflow
(cf5)
Storage
k"3
Stage
k)
Outflow
cfs)
Opening (W)
(cfs)lots)lots)
Opening (0)
Barrel
Orlflce
(cfs)
Weir 1
(cts)lots)
Weir 2
140.0
203.8
2732110.0
B.9
157.50
174.13
170.74
135.29
0.00
22.21
0.00
144.0
190.2
2743229.8
8.9
160.21
175.78
171.57
135.58
0.00
24.63
0.00
148.0
177.5
2750428.5
8.9
162.00
176.85
172.10
135.76
0.00
26.24
0.00
152.0
165.6
2754142.4
8.9
162.94
177.40
172.37
135.86
0.00
2Z09
0.00
156.0
154.5
2754780.9
8.9
163.11
177.50
172.42
135.87
0.00
27.23
0.00
160.0
144.2
2752721.5
8.9
162.58
177.19
172.27
135.82
0.00
26.76
0.00
164.0
134.5
2748306.9
8.9
161.47
176.53
171.94
135.71
0.00
25.76
0.00
168.0
125.5
2741844.4
8.9
159.86
175.57
171.46
135.54
0.00
24.32
0.00
172.0
117.1
2733606.8
8.9
157.86
174.35
170.85
135.33
0.00
22.53
0.00
176.0
109.3
2723834.1
8.8
155.55
172.91
170.12
135.08
0.00
20.47
0.00
180.0
102.0
2712735.2
8.8
153.01
171.27
169.29
134.79
0.00
18.22
0.00
184.0
95.2
2700490.6
8.8
150.32
169.47
168.37
134.47
0.00
15.85
0.00
188.0
88.8
2687254.0
8.8
147.55
167.52
167.36
134.13
0.00
13.42
0.00
192.0
82.9
2673155.4
8.8
144.75
165.46
166.29
133.76
0.00
10.99
0.00
196.0
77.3
2658301.7
8.7
142.00
163.29
165.14
133.37
0.00
8.62
0.00
200.0
72.1
2642779.3
8.7
139.34
161.04
163.94
132.96
0.00
6.37
0.00
204.0
67.3
2626653.9
0.7
136.83
158.70
162.68
132.54
0.00
4.30
0.00
208.0
62.8
2609970.8
8.7
134.56
156.29
161.36
132.09
0.00
2.46
0.00
212.0
58.6
2592752.8
8.6
132.61
153.82
159.98
131.64
0.00
0.97
0.00
216.0
54.7
2574993.6
B.6
131.20
151.28
158.55
131.16
0.00
0.04
0.00
220.0
51.0
2556631.4
8.6
130.67
148.66
157.06
130.67
0.00
0.00
0.00
224.0
47.6
2537519.6
8.5
130.15
145.95
155.49
130.15
0.00
0.00
0.00
228.0
44.4
2517712.4
8.5
129.61
143.16
153.84
129.81
0.00
0.00
0.00
232.0
41.5
2497269.9
B.5
129.05
140.29
152.11
129.05
0.00
0.00
0.00
236.0
38.7
2476248.0
8.4
128.47
137.36
150.32
128.47
0.00
0.00
0.00
240.0
36.1
2454699.2
8.4
127.88
134.37
148.45
127.88
0.00
0.00
0.00
244.0
33.7
2432672.3
8.4
127.27
131.33
146.52
127.27
0.00
0.00
0.00
248.0
31.4
2410213.0
8.3
126.64
128.25
144.52
126.64
0.00
0.00
0.00
252.0
29.3
2387363.8
8.3
125.14
125.14
142.45
125.99
0.00
0.00
0.00
256.0
27.4
2364369.6
8.3
122.03
122.03
140.33
125.34
0.00
0.00
0.00
260.0
25.5
2341651.3
8.2
118.97
118.97
138.20
124.69
0.00
0.00
0.00
264.0
23.8
2319226.5
8.2
115.98
115.98
136.07
124.04
0.00
0.00
0.00
268.0
22.2
2297110.2
8.1
113.05
113.05
133.92
123.40
0.00
0.00
0.00
272.0
20.7
2275315.0
8.1
110.18
110.18
131.77
122.77
0.00
0.00
0.00
276.0
19.4
2253851.7
8.1
107.37
107.37
129.62
122.14
0.00
0.00
0.00
280.0
18.1
2232728.9
8.0
104.63
104.63
127.46
121.51
0.00
0.00
0.00
284.0
16.9
2211953.6
8.0
101.95
101.95
125.29
120.89
0.00
0.00
0.00
288.0
15.7
2191531.2
8.0
99.33
99.33
123.12
120.28
0.00
0.00
0.00
292.0
14.7
2171465.9
7.9
96.78
96.78
120.95
119.67
0.00
0.00
0.00
296.0
13.7
2151760.3
7.9
94.29
94.29
118.77
119.07
0.00
0.00
0.00
300.0
12.8
2132416.1
7.9
91.87
91.87
116.60
118.48
0.00
0.00
0.00
304.0
11.9
2113434.1
7.8
89.51
89.51
114.41
117.90
0.00
0.00
0.00
308.0
11.1
2094814.0
7.8
87.21
87.21
112.23
117.32
0.00
0.00
0.00
312.0
10.4
2076554.6
7.8
84.97
84.97
110.04
116.75
0.00
0.00
0.00
316.0
9.7
2058654.4
7.7
82.78
82.78
107.85
116.19
0.00
0.00
0.00
320.0
9.0
2041110.8
7.7
80.66
80.66
105.66
115.64
0.00
0.00
0.00
324.0
8.4
2023921.0
7.7
78.60
78.60
103.46
115.09
0.00
0.00
0.00
328.0
7.9
2007081.5
7.7
76.59
76.59
101.25
114.55
0.00
0.00
0.00
332.0
7.3
1990588.4
7.6
74.64
74.64
99.05
114.02
0.00
0.00
0.00
336.0
6.9
1974437.6
7.6
72.74
72.74
96.83
113.50
0.00
0.00
0.00
340.0
6,4
1958624.4
7.6
70.89
70.89
94.61
112.98
0.00
0.00
0.00
344.0
6,0
1943144.1
7.5
69.10
69.10
92.38
112.48
0.00
0.00
0.00
348.0
5.6
1927991.6
7.5
67.36
67.38
90.14
111.98
0.00
0.00
0.00
352.0
5.2
1913161.7
7.5
65.66
65.66
87.89
111.49
0.00
0.00
0.00
356.0
4.8
1898648.8
7.5
64.02
64.02
85.63
111.00
0.00
0.00
0.00
380.0
4.5
1884447.6
7.4
62.42
62.42
83.35
110.53
0.00
0.00
0.00
384.0
4.2
1870552.2
7.4
60.87
60.87
81.06
110.06
0.00
0.00
0.00
368.0
3.9
1856967.1
7.4
59.36
59.36
78.75
109.60
0.00
0.00
0.00
372.0
3.7
1843656.4
7.4
57.89
57.89
76.42
109.14
0.00
0.00
0.00
376.0
3.4
1830644.3
7.3
56,47
56.47
74.06
108.70
0.00
0.00
0.00
380.0
3.2
1817915.0
7.3
55.08
55.08
71.68
108.26
0.00
0.00
0.00
384.0
3.0
1805462.6
7.3
53.74
53.74
69.27
107.83
0.00
0.00
0.00
388.0
2.8
1793281.3
7.3
52.44
52.44
66.82
107.40
0.00
0.00
0.00
392.0
2.6
1781365.4
7.3
51.17
51.17
64.34
106.99
0.00
0.00
0.00
396.0
2.4
1769709.0
7.2
49.94
49.94
61.81
106.58
0.00
0.00
0.00
400.0
2.3
1758308.5
7.2
48.74
48.74
59.23
108.17
0.00
0.00
0.00
404.0
2.1
1747152.2
7.2
47.58
47.58
58.58
105.78
0.00
0.00
0.00
408.0
2.0
1736240.5
7.2
46.45
46.45
53.87
105.39
0.00
0.00
0.00
PON0100%.XLS

25 Year (Lots 100 % Imp.)
Time
min
Inflow
cfs
Storage
ft"3)
Stage
ft
Outflow
(cfs)
Opening (W)
(cfs)
Opening (0)
Icfs
Barrel
(cfs
Orifice
(cfs)
Weir 1
(cfs)
Weir 2
(cfs)
412.0
1.8
1725565.8
7.2
45.35
45.35
51.07
105.01
0.00
0.00
0.00
416.0
1.7
1715122.9
7.1
44.29
44.29
48.17
104.63
0.00
0.00
0.00
420.0
1.6
1704906.2
7.1
43.25
43.25
45.16
104.26
0.00
0.00
0.00
424.0
1.5
1B94910.5
7.1
42.24
42.24
41.99
103.90
0.00
0.00
0.00
428.0
1.4
1685130.6
7.1
41.27
41.27
38,64
103.54
0.00
0.00
0.00
432.0
1.3
1675561.4
7.1
40.31
40.31
35.05
103.19
0.00
0.00
0.00
436.0
1.2
1566197.9
7.1
39.39
39.39
31.14
102.85
0.00
0.00
0.00
440.0
1.1
1657035.3
7.0
38.49
38.49
26.75
102.51
0.00
0.00
0.00
444.0
1.1
1648068.6
7,0
37.62
37.62
21.61
102.17
0.00
0.00
0.00
448.0
1.0
1639293.1
7.0
36.77
36.77
14.95
101.85
0.00
0.00
0.00
452.0
0.9
1630704.3
7.0
35.95
35.95
0.00
101.52
0.00
0.00
0.00
456.0
0.9
1822297.6
7.0
35.15
35.15
0.00
101.21
0.00
0.00
0.00
460.0
0.8
1614068.7
7.0
34.37
34.37
0.00
100.90
0.00
0.00
0.00
464.0
0.7
1606013.1
7.0
33.61
33.61
0.00
100.59
0.00
0.00
0.00
468.0
0.7
1598126.7
6.9
32.87
32.87
0.00
100.29
0.00
0.00
0.00
472.0
0.7
1590405.3
6.9
32.15
32.15
0.00
100.00
0.00
0.00
0.00
476.0
0.6
1582844.9
6.9
31.45
31.45
0.00
99.71
0.00
0.00
0.00
480.0
0.6
1575441.5
6.9
30.78
30.78
0.00
99.42
0.00
0,00
0.00
484.0
0.5
1568191.4
6.9
30.11
30,11
0.00
99.14
0.00
0.00
0.00
408.0
0.5
1561090.8
6.9
29.47
29.47
0.00
98.87
0.00
0.00
0.00
492.0
0.5
1554136.0
6.9
28.85
28.85
0.00
98.60
0.00
0.00
0.00
496.0
0.4
1547323.5
6.9
28.24
28.24
0.00
98.33
0.00
0.00
0.00
500.0
0.4
1540649.8
6.8
27.64
27.64
0.00
98.07
0.00
0.00
0.00
504.0
0.4
15341114
6.8
27.07
27.07
0.00
97.81
0.00
0.00
0.00
508.0
0.3
1527705.2
6.8
26.50
26.50
0.00
97.56
0.00
0.00
0.00
512.0
0.3
1521427.8
6.8
25.96
25.96
0.00
97.31
0.00
0.00
0.00
516.0
0.3
1515276.2
6.8
25.42
25.42
0.00
97.07
0.00
0.00
0.00
520.0
0.3
1509247.2
6.8
24.91
24.91
0.00
96.83
0.00
0.00
0.00
524.0
0.3
1503338.0
6.8
24.40
24.40
0.00
96.59
0.00
0.00
0.00
520.0
0.2
1497545.E
6.8
23.91
23.91
0.00
96.36
0.00
0.00
0.00
532.0
0.2
1491867.2
6.8
23.43
23.43
0.00
96.13
0.00
0.00
0.00
POND100%.%LS

HS @ 25 Year, 100 % Imp.
Chainsaw Routing Method
Project Name:
New Pond at Horseshoe Lake
Project IS:
LFA-94020
Date :
8/24195
Operator:
DAC
Title:
25 Year Storm - Horseshoe Lake
Weir Box I Barrel:
Hydrograph:
N barrels =
Op =
NIA CFS
Opening H
Tp =
NIA minutes
Opening L =
dT=
NIA minutes
Cw=
Zcr =
Stage -Storage :
Barrel Dia. =
Ks = 292794.0
Barrel Inv. =
b= 1.194
Cd=
Zo =
3.6 feet
Orifice:
Initial Water Level :
N =
Zi =
3.6 feet
D =
Cd =
Computed Results
:
Invert =
Normal Surf. Area =
0. SF
Max. Surf, Area =
415023. SF
Weir 1:
Peak Elev. =
6.02 feet
L =
Peak Stage =
2.4 feet
Zcr =
Peak Outflow =
138.38 CFS
Cw =
Volume Stored =
841622.5 R'
Weir 2:
L=
Zcr =
Cw =
The John R. McAdams Company
P.O. Box 14005
Research Triangle Park, NC 27709
0.00
0.00 feet
0.00 feet
0.00
0.00 feet
0.00 inches
0.00 feet
0.00
1.00
27.00 inches
0.60
3.50 feet
265.00 feet
5.80 feet
2.68
150.00 feet
5.80 feet
2.68
180,0 System Loading and Response
Inflow
Iwo
a mow
1400
-
120.0
00 0
60 0
0
e0 o
400
20.0
00
0.0 100.0 2000.300.0 400.0 500.0 600.o
Time (min)
Time
min)
Inflow
(cfs)
Storage
(f A3)
Stage
tt)
Outflow
cfs)
Opening (W)
cf!
Opening (0)
(cfs)
Barrel
(cfa
Orifice
(cfa)
Weir
(cfs)
Weir
cfs
0.0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
4.0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
8.0
0.0
0.0
3,6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
12.0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
16.0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
20.0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0,00
0.00
24.0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
28.0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
32.0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0,00
0.00
36.0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
- 0.00
0.00
0.00
40.0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
44.0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
48.0
0.0
0.0
3.0
0.00
0.00
0.00
0.00
0.00
0.00
0.00
52.0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
56.0
1.5
0.0
3.6
0.19
0.00
0.00
0.00
0.19
0.00
0.00
60.0
6.6
319.8
3.6
0.20
0.00
0.00
0.00
0.20
0.00
0.00
64.0
13.9
1854.6
3.6
0.23
0.00
0.00
0.00
0.23
0.00
0.00
68.0
23.1
5144.0
3.6
0.30
0.00
0.00
0.00
0.30
0.00
0.00
72.0
33.7
10615.0
3.7
0.39
0.00
0.00
0.00
0.39
0.00
0.00
76,0
45.3
18602.9
3.7
0.54
0.00
0.00
0.00
0.54
0.00
0.00
80.0
57.7
29352.5
3.7
0.73
0.00
0.00
0.00
0.73
0.00
0.00
84.0
70.3
43016.3
3.8
0.99
0.00
0.00
0.00
0.99
0.00
0.00
88.0
82.9
59653.5
3.9
1.32
0.00
0.00
0.00
1.32
0.00
0.00
92.0
05.1
79232.0
3.9
1.73
0.00
0.00
0.00
1.73
0.00
0.00
96.0
106.5
101632.8
4.0
2.21
0.00
0.00
0.00
2.21
0.00
0.00
100.0
116.9
126657.6
4.1
2.77
0.00
0.00
0.00
2.77
0.00
0.00
104.0
126.2
154051.6
4.2
3.41
0.00
0.00
0.00
3.41
0.00
0.00
108,0
127.9
183529.7
4.3
4A2
0.00
0.00
0.00
4.12
0.00
0.00
112.0
129.4
213245.9
4.4
4.86
0.00
0.00
0.00
4.86
0.00
0.00
116,0
130.7
243143.5
4.5
5.63
0.00
0.00
0.00
5.63
0.00
0.00
120.0
133.6
273171.4
4.5
6.42
0.00
0.00
0.00
6A2
0.00
0.00
124.0
138.8
303704.7
4.6
7.25
0.00
0.00
0.00
7.25
0.00
0.00
128.0
144.3
335277.2
4.7
8.12
0.00
0.00
0.00
8.12
0.00
0.00
132.0
149A
367956.0
4.8
9.05
0.00
0.00
0.00
9.05
0.00
0.00
136.0
153.9
401647.6
4.9
10.02
0.00
0.00
0.00
10.02
0.00
0.00
PONDtoO%.XLS

HS Q 25 Year, 100 % Imp.
Time
min
Inflow
(cfs)
Storage
k^J)
Stage
k
Outflow
(cfs)
Opening (W)
cfs)
Opening (0)
(cfs)
Barrel
cfs)
Orifice
(cfs)
Weir 1
(cfs)
Weir 2
(cfs)
140.0
157.5
436177.2
5.0
11.03
0.00
0.00
0.00
11.03
0.00
0.00
144.0
160.2
471330.8
5.1
12.08
0.00
0.00
0.00
12.08
0.00
0.00
148.0
162.0
506880.4
5.2
13.16
0.00
0.00
0.00
13.16
0.00
0.00
152.0
162.9
542601.5
5.3
14.27
0.00
0.00
0.00
14.27
0.00
0.00
156.0
183.1
578283.2
5.4
15.39
0,00
0.00
0.00
15.39
0.00
0.00
160.0
162.6
613734.9
5.5
16.52
0.00
0.00
0.00
16.52
0.00
0.00
164.0
161.5
648789.8
5.5
17.65
0.00
0.00
0.00
17.65
0.00
0.00
168.0
159.9
683305.8
6.6
18.78
0.00
0.00
0.00
18.78
0.00
0.00
172.0
157.9
717165.8
5.7
19.90
0.00
0.00
0.00
19,90
0.00
0.00
176.0
155.E
750278.3
5.8
20.71
0.00
0.00
0.00
2011
0.00
0.00
180.0
153.0
782637.5
5.9
45.79
0.00
0.00
0.00
21.40
15.57
8.82
184.0
150.3
808370.9
5.9
80.77
0.00
0.00
0.00
21,93
37.57
21.27
188.0
147.5
825064.6
6.0
108.15
0.00
0.00
0.00
22.26
54.85
31.04
192.0
144.8
834519.9
6.0
125.06
0.00
0.00
0.00
22.45
65.52
37.09
196.0
142.0
839246.0
6.0
133.86
0.00
0.00
0.00
22.54
71.09
40.24
200.0
139.3
841197.6
6.0
137.57
0.00
0.00
0.00
22.58
73.43
41.56
204.0
136.8
841622.5
6.0
138.38
0.00
0.00
0.00
22.59
73,94
41.85
208.0
134.6
841252.1
6.0
137.67
0.00
0.00
0.00
22.58
73.49
41.60
212.0
132.E
840505.4
6.0
136.25
0.00
0.00
0.00
22.56
72.59
41.09
216.0
131.2
039632.4
6.0
134.59
0.00
0.00
0.00
22.55
71.55
40.50
220.0
130.7
038818.4
6.0
133.06
0.00
0.00
0.00
22.53
70.58
39.95
224.0
130.2
838244.4
6.0
131.98
0.00
0.00
0.00
22.52
69.90
39.56
228.0
129.6
837805.3
6.0
131.16
0.00
0.00
0.00
22.51
69.38
39.27
232.0
129.1
837434.6
6.0
130.46
0.00
0.00
0.00
22.50
68.94
39.02
236.0
128.5
837096.1
6.0
129.83
0.00
0.00
0.00
22.50
68.54
38.80
240.0
127.9
836770.6
6.0
129.22
0.00
0,00
0.00
22.49
68.15
38.58
244.0
127.3
836447.6
6.0
128.62
0.00
0.00
0.00
22.49
67.78
38.36
248.0
126.6
036121.6
6.0
128.02
0.00
0.00
0.00
22.48
67.39
38.15
252.0
125.1
835789.8
6.0
127.40
0.00
0.00
0.00
22.47
67.00
37.93
256.0
122.0
835246.0
6.0
126.40
0.00
0.00
0.00
22.46
66.37
37.57
260.0
119.0
834196.8
6.0
124.47
0.00
0.00
0.00
22.44
65.15
36.88
264.0
116.0
832878.1
6.0
122.06
0.00
0.00
0.00
22.42
63.63
36.01
268.0
113.0
831419.6
&0
119.41
0.00
0.00
0.00
22.39
61.96
35.07
272.0
110.2
829692.2
6.0
116.66
0.00
0.00
0.00
22.36
60.22
34.09
276.0
107.4
828335.1
6.0
113.89
0.00
0.00
0.00
22.33
58.47
33.10
280.0
104.6
826770.1
6.0
111.13
0.00
0.00
0.00
22.29
56.73
32.11
284.0
101.9
825209.6
6.0
108.40
0.00
0.00
0.00
22.26
55.00
31.13
288.0
99.3
823660.5
6.0
105.72
0.00
0.00
0.00
22.23
53.31
WAS
292.0
96.8
822127.1
6.0
103.10
0.00
0.00
0.00
22.20
51.65
29.24
296.0
94.3
820611.7
6.0
100.53
0.00
0.00
0.00
22.17
50.03
28.32
300.0
91.9
819116.0
6.0
98.02
0.00
0.00
0.00
22.14
48.45
27.42
304.0
89.5
817640.8
&0
95.57
0.00
0.00
0.00
22.11
46.90
26.55
308.0
87.2
816186.7
6.0
93.17
0.00
0.00
0.00
22.08
45.40
25.70
312.0
85.0
814754.0
6.0
90.84
0.00
0.00
0.00
22.06
43.93
24.86
316.0
82.8
813343.0
6.0
88.57
0.00
0.00
0.00
22.03
42.49
24.05
320.0
807
811953.7
5.9
86.36
0.00
0.00
0.00
22.00
41.10
23,26
324.0
78.6
810586.2
5.9
84.21
0.00
0.00
0.00
21.97
39,74
22.49
328.0
76.6
809240.3
5.9
82.11
0.00
0.00
0.00
21.94
38,42
21.75
332.0
74.6
807916.1
5.9
80.07
0.00
0.00
0.00
21.92
37.13
21.02
336.0
72.7
806613.2
5.9
78.08
0,00
0.00
0.00
21.89
35.88
20.31
340.0
70.9
805331.7
5.9
76.15
0.00
0.00
0.00
21.87
34.66
19.62
344.0
69.1
804071.1
5.9
74.27
0.00
0.00
0.00
21.84
33.48
18.95
348.0
67.4
802831.4
5.9
72.44
0.00
0.00
0.00
21.81
32.33
18.30
352.0
65.7
801612.2
5.9
70.66
0.00
0.00
0.00
21.79
31.21
17.66
356.0
64.0
800413.2
5.9
68.93
0.00
0.00
0.00
21.77
30.12
17.05
360.0
62.4
799234.1
5.9
67.25
0.00
0.00
0,00
2174
29.06
16.45
364.0
60.9
798074.7
5.9
65.62
0.00
0.00
0.00
21.72
28.03
15.87
368.0
59.4
796934.6
5.9
64.03
0.00
0.00
0.00
21.69
27.03
15.30
372.0
57.9
795813.4
5.9
62.49
0.00
0.00
0.00
21.67
26.06
14.75
376.0
56.5
794710.9
5.9
60,99
0.00
0.00
0.00
21.65
25.12
14.22
380.0
55.1
793626.5
5.9
59.53
0.00
0.00
0.00
21.63
24.20
13.70
384.0
53.7
792560.0
5.9
58.11
0.00
0.00
0.00
21.60
23.31
13.20
388.0
52.4
791511.1
5.9
56.73
0.00
0.00
0.00
21.58
22.45
12.71
392.0
51.2
790479.2
5.9
55.40
0.00
0.00
0.00
21.56
21.61
12.23
396,0
49.9
789464.1
5.9
54. 10
0.00
0.00
0.00
21.54
20.79
11.77
400.0
48.7
788465.3
5.9
52.83
0.00
0.00
0.00
21.52
20.00
11.32
404.0
47.6
787482.6
5.9
51.61
0.00
0.00
0.00
21.50
19.23
10.88
408.0
46.4
786515.4
5.9
50.41
0.00
0.00
0.00
21.48
18.48
10.46
POND100%.XLS

HS @ 25 Year, 100 % Imp.
Time
min)
Inflow
(cfs)
Storage
(11-3)
Stage
(@)
Outflow
cfs)
Opening (W)
ch
Opening (0)
cfa
Barrel
cfa
Orifice
cfs)
Weir 1
ch)
Weir 2
(cfs
412.0
45.4
785563.4
5.9
49.26
0.00
0.00
0.00
21.46
17.75
10.05
416.0
44.3
784626.2
5.9
48.13
0.00
0.00
0.00
21.44
17.04
9.65
420.0
43.2
783703.4
5.9
47.04
0.00
0.00
0.00
21.42
16.36
9.26
424.0
42.2
782794.7
5.9
45.97
0.00
0.00
0.00
21,40
15.69
B.68
428.0
41.3
781899.6
5.9
44.94
0.00
0.00
0.00
21.38
15.04
8.51
432.0
40.3
781017.8
6.9
43.94
0.00
0.00
0.00
21,37
14.41
8,16
436.0
39.4
780148.9
5.9
42.96
0.00
0.00
0.00
21.35
13.80
7.81
440.0
38.5
779292.5
5.9
42.01
0.00
0.00
0.00
21.33
13.21
7.48
444.0
37.6
778448.1
5.9
41.09
0.00
0.00
0.00
21.31
12.63
7.15
448.0
36.8
777615.5
5.9
40.19
0.00
0.00
0.00
21.29
12.07
6.83
452.0
35.9
776794.3
5.9
39.32
0.00
0.00
0.00
21.28
11.52
6.52
456.0
35.1
775984.0
5.9
38.48
0.00
0.00
0.00
21.26
10.99
6.22
460.0
34.4
775184.2
5.9
37.66
0.00
0.00
0.00
21.24
10.48
5.93
464.0
33.6
774394.7
5.9
36.86
0.00
0,00
0.00
21.23
9.98
5.65
468.0
32.9
773614.9
5.9
35.08
0.00
0.00
0.00
21.21
9.49
.5.37
472.0
32,2
772844.6
5.9
35.32
0.00
0.00
0.00
21.10
9.02
5.11
476.0
31.5
772083.3
5.9
34.59
0.00
0.00
0.00
21.18
8.56
4.85
480.0
30.8
771330.6
5.9
33.88
0.00
0.00
0.00
21.16
8.12
4.60
484.0
30.1
770586.1
6.8
33.18
0.00
0.00
0.00
21.15
7.69
4.35
468.0
29.5
769849.5
5.8
32.51
0.00
0.00
0.00
21.13
7.27
4.11
492.0
28.8
769120.3
5.8
31.85
0.00
0.00
0.00
21.12
6.86
3.88
496.0
28.2
768398.1
5.8
31.22
0.00
0.00
0.00
21.10
6.48
3.66
500.0
27.6
767682.5
5.8
30.60
0.00
0.00
0.00
21.09
6.08
3.44
504.0
27.1
766973.0
5.8
30.00
0.00
0.00
0.00
21.07
5.70
3.23
508.0
26.5
766269.2
5.8
29.42
0.00
0.00
0.00
21.06
5.34
3.02
512.0
28.0
765570.7
5.8
28.85
0.00
0.00
0.00
21.04
4.99
2.82
516.0
25.4
764876.9
5.8
28.30
0,00
0.00
0.00
21.03
4.64
2.63
520.0
24.9
764187.4
5.a
27.76
0.00
0.00
0.00
21.01
4.31
2.44
524.0
24.4
763501.6
1.8
27.24
0.00
0.00
0.00
21.00
3.99
2.28
528.0
23.9
762819.1
5.8
26.74
0.00
0.00
0.00
20.98
3.68
2.08
532.0
23.4
762139.1
5.B
26.25
0.00
0.00
0.00
20.97
3,37
1.91
POND100%.%LS

3o
50 Year (Lots 100% Imp.)
Chalnsaw Routing Method
Project Name:
New Pond at Horseshoe Lake
Project It:
LFA-94020
Date:
8124195
Operator:
DAC
7ille :
50 Year Storm
The John R. McAdams Company
P.O. Box 14005
Research Triangle Park, NC 27709
Weir Box I Barrel:
Hydrograph:
Nbarrels =
2.00
Op = 590.0 CFS
Opening H
2.00 feet
Tp = 79.4 minutes
Opening L =
12.00 feet
dT= 4.0 minutes
Cw=
3.00
Zcr =
6.00 feet
Stage -Storage;
Barrel Dia. =
24.00 inches
Ks = 358260.0
Barrel Inv. =
3.60 feet
b= 1.210
Cd=
0.65
Zo = 3.5 feet
Orifice:
Initial Water Level :
N =
0.00
Zi = 5.0 feet
D =
0.00 inches
Cot =
0.00
Computed Results:
Invert=
0.00 feet
Normal Surf. Area = 472023. SF
Max. Surf. Area = 625785, SF
Weir 1:
Peak Elev. = 9.24 feet
L =
50.00 feet
Peak Stage = 5.7 feet
Zcr =
8.60 feet
Peak Outflow = 232.97 CFS
Sideslope =
10.00
Volume Stored = 2385728.8 ft'
Weir 2:
L =
0.00 feet
Zcr=
0.00 feet
Cw =
0.00
r
600 o System Loading and Response
Inflow
00 5.0
- Z.
400.0
v"3ao.o
3
0
G200.0
two
00
o0 50.o 100.o 150.0 200.0
71me (min)
Time
min
Inflow
ch
Storage
ft"3)
Stage
(ft)
Outflow
(cfs)
Opening (W)
cfs
Opening (0)
cfs
Barrel
cfsl
Orifice
cfs
Weir 1
(cfs)
Weir 2
cfs
0.0
0.0
585152.1
5.0
0.00
0.00
0.00
0.00
0.00
0.00
0.00
4.0
3.7
685152.1
5.0
0.00
0.00
0.00
0.00
0.00
0.00
0.00
8.0
14.7
586036.9
5.0
0.00
0.00
0.00
0.00
0.00
0.00
0.00
12.0
32.6
589554.3
5.0
0.00
0.00
0.00
0.00
0.00
0.00
0.00
16.0
57.2
697385.9
5.0
0.00
0.00
0.00
0.00
0.00
0.00
0.00
20.0
87.6
611105.7
5.1
0.00
0.00
0.00
0.00
0.00
0.00
0.00
24.0
123.3
632140.5
5.1
0.00
0.00
0.00
0.00
0.00
0.00
0.00
28.0
163.3
661734.3
5.2
0.00
0.00
0.00
0.00
0.00
0.00
0.00
32.0
206.5
700917.1
5.2
0.00
0.00
0.00
0.00
0.00
0.00
0.00
36.0
252.0
750479.0
5.3
0.00
0.00
0.00
0.00
0.00
0.00
0.00
40.0
298.5
810951.1
5.5
0.00
0.00
0.00
0.00
0.00
0.00
0.00
44.0
344.9
882591S
SS
0.00
0.00
0.00
0.00
0.00
0.00
0.00
48.0
390.1
965379.2
5.8
0.00
0.00
0.00
0.00
0.00
0.00
0.00
52.0
433.0
1059014.4
5.9
0.00
0.00
0.00
0.00
0.00
0.00
0.00
56.0
472.3
1162926.5
6.1
2.01
2.01
0.00
81.50
0.00
0,00
0.00
60.0
507.3
1275805.3
6.4
7.67
7.67
0.00
86.88
0.00
0.00
0.00
64.0
536.9
1395711.6
6.6
15.77
15.77
0.00
92.16
0.00
0.00
0.00
68.0
560.5
1520785.3
6.8
25.90
25.90
0.00
97.29
0.00
0.00
0.00
72.0
577.4
1649087.9
7.0
22.25
37.72
22.25
102.21
0.00
0.00
0.00
76.0
587.3
1782333.8
7.3
51.27
51.27
64.55
107.02
0.00
0.00
0.00
80.0
589.9
1910989.3
7.5
65.42
65.42
87.55
111.41
0.00
0.00
0.00
84.0
585.1
2036869.2
7.7
80.15
80.15
105.12
115.50
0.00
0.00
0.00
88.0
573.1
2158063.3
7.9
95.09
95.09
119.48
119.27
0.00
0.00
0.00
92.0
554.1
2272782.8
8.1
109.84
109.84
131.52
122.69
0.00
0,00
0.00
96.0
528.6
2379402.5
8.3
124.06
124.06
141.72
125.77
0.00
0.00
0.00
100.0
498.1
2476498.3
8.4
128.48
137.39
150.34
128.48
0.00
0.00
0.00
104.0
466S
2565196.7
8.6
130,90
149.88
157.76
130.90
0.00
0.00
0.00
108.0
436.9
2645737.8
8.7
139.82
161.46
164.17
133.04
0.00
6.78
0.00
112.0
409.2
2717039.0
8.8
153.99
171.90
169.61
134.90
0.00
19.09
0.00
116.0
383.3
2778294.3
8.9
169.29
181.00
174.14
136.47
0,00
32.82
0.00
120.0
359.0
2829649.9
9.0
184.08
188.73
177.83
137.77
0.00
46.31
0.00
124.0
336.2
2871626.1
9.1
197.39
195.10
180.78
138.82
0.00
58.57
0.00
128.0
314.9
2904946.5
9.1
208.70
200.20
183.09
139.85
0.00
69.06
0.00
132.0
294.9
2930436.0
9.2
217.79
204.12
184,83
140.27
0.00
77.52
0.00
136,0
276.2
2948952.8
9.2
224.63
205.98
186.08
140.73
0.00
83.90
0.00
POND100%.XLS

50 Year (Lots 100 % Imp.)
3l'
/4Z
Time
min
Inflow
(cis)
Storage
(k"3)
Stage
(k
Outflow
cfs)
Opening (W)
cfs
Opening (0)
cfs)
Barrel
(cfs)
Orifice
(cfs)
Weir 1
(cfs)
Weir 2
(cfs)
140.0
258.7
2961341.7
9.2
229.31
208.90
186.91
141.03
0.00
88.28
0,00
144.0
242.3
2968404.3
9.2
232.01
210.00
187.39
141.20
0.00
90.81
0.00
148.0
227.0
2970880.8
9.2
232.97
210.38
187.55
141.26
0.00
91.71
0.00
152.0
212.6
2969441.1
9.2
232.41
210.16
187.45
141.22
0.00
91.19
0.00
156.0
199.1
2964681.6
9.2
230.58
209.42
187.14
141.11
0.00
89.48
0,00
160.0
186.5
2957126.9
9.2
227.71
208.25
186.63
140.93
0.00
86.78
0.00
164.0
174.7
2947233.9
9.2
223.98
206.71
185.96
140.68
0.00
83.30
0.00
188.0
163.6
2935396.8
9.2
219.60
204.88
185.16
140.39
0.00
79.21
0.00
172.0
153.2
2921953.7
9.2
214.73
202.81
184.25
140.06
0.00
74.66
0.00
176.0
143.5
2907192.5
9.1
209,49
200.54
183.24
139.70
0.00
69.79
0.00
1B0.0
1344
2891357.3
9.1
204.01
198.11
182.15
139.31
0.00
64.70
0.00
184.0
125.9
2874653.8
9.1
198,39
195.56
180.99
138.89
0.00
59.49
0.00
188.0
117.9
2857254.1
9.1
192.71
192.91
179.78
138.46
0.00
54.25
0.00
192.0
110.4
2839302.0
9.0
187.04
190.19
178.51
138.01
0.00
49.03
0.00
196.0
103.4
2820916.1
9.0
181.44
187.41
177.21
137.55
0.00
43.89
0.00
200.0
96.9
2802193.5
9.0
175.96
184.59
175.87
137.08
0.00
38.88
0.00
204.0
90.7
2783213.0
8.9
170.64
181.74
174.50
136.60
0.00
34.04
0,00
208.0
85.0
2764037.0
8.9
165.50
178.87
173.10
136.11
0.00
29.39
0.00
212.0
79.6
2744713.9
8.9
160.57
176.00
171.68
135.61
0.00
24.96
0.00
216.0
74.6
2725279.6
8.8
155.89
173.12
170.23
135.11
0.00
2037
0.00
220.0
69.8
2705758.4
8.8
151.47
170.24
168.77
134.61
0.00
16.86
0.00
224.0
65.4
2686164.6
8.8
147.33
167.38
167.28
134.10
0.00
13.23
0.00
228.0
61.3
2668501.9
8.8
143.49
164.49
165.78
133.59
0.00
9.91
0.00
232.0
67.4
2646764.0
8.7
140.00
161.61
164.25
133.07
0.00
6.93
0.00
236.0
53.7
2626933.6
8.7
136.87
158.74
162.70
132.54
0.00
4.33
0.00
240.0
50.3
2606979.6
8.7
134.19
155.86
161.12
132.02
0.00
2.17
0.00
244.0
47.1
2586852.7
8.6
132.06
152.97
159.51
131.48
0.00
0.58
0.00
248.0
44.1
2566471.2
8.6
130.93
150.06
167.86
130.93
0.00
0.00
0.00
252.0
41.3
2545643.1
8.6
130.37
147.10
156.16
130.37
0.00
0.00
0.00
256.0
38.7
2524278.1
8.5
129.79
144.09
154.39
129.79
0.00
0.00
0.00
260.0
36.3
2502423.1
8.5
129.19
141.01
152.55
129.19
0.00
0.00
0.00
264.0
34.0
2480122.0
8.4
128.58
137.90
150.65
128.58
0.00
0.00
0.00
268.0
31.8
2457416.0
8.4
127.95
134.74
148.69
127.95
0.00
0.00
0.00
272.0
29.8
2434343.8
8.4
127.31
131.56
146.67
127.31
0.00
0.00
0.00
278.0
27.9
2410941.5
8.3
126,66
128.35
144.58
126.66
0.00
0.00
0.00
280.0
26.1
2387243.1
8.3
125.12
125.12
142.44
125.99
0.00
0.00
0.00
284.0
24.5
2363488.5
8.3
121.91
121.91
140.25
125.31
0.00
0.00
0.00
268.0
22.9
2340107.5
8.2
118.77
118.77
138.06
124.64
0.00
0.00
0.00
292.0
21.5
2317107.B
8.2
115.70
115.70
135.86
123.98
0.00
0.00
0.00
296.0
20.1
2294495.8
8.1
112.70
112.70
133.67
123.33
0.00
0.00
0.00
300.0
18.8
2272276.0
8.1
109.78
109.78
131.47
122.68
0.00
0.00
0.00
304.0
17.6
2250451.6
8.1
106.93
106.93
129.27
122.04
0.00
0.00
0.00
308.0
16.5
2229024.8
8.0
104.15
104.15
127.07
121.40
0,00
0.00
0.00
312.0
15.5
2207996.5
8.0
101.44
101.44
124.87
120.77
0.00
0.00
0.00
316.0
14.5
2187366.6
8.0
98.80
98.80
122.68
120.15
0.00
0.00
0.00
320.0
13.6
2167134.3
7.9
96.23
96.23
120,48
119.54
0.00
0.00
0.00
324.0
12.7
2147297.8
7.9
93.73
93.73
118,28
118.04
0.00
0.00
0.00
328.0
11.9
2127854.8
7.9
91.30
91.30
118.08
118.34
0.00
0.00
0.00
332.0
11.2
2108802.2
7.8
88.93
88.93
113.88
117.76
0.00
0.00
0.00
336.0
10.5
2090136.4
7.8
86.63
86.63
111.67
117.18
0.00
0.00
0.00
340.0
9.8
2071853.6
7.8
84.39
B4.39
109.47
116.61
0.00
0.00
0.00
344.0
9.2
2053949.1
7.7
82.21
82.21
107.27
116.04
0.00
0.00
0.00
348.0
8.6
2036418.1
7.7
80.10
80.10
105.06
115.49
0.00
0.00
0.00
352.0
8.0
2019255.6
7.7
78.04
78.04
102.85
114.94
0.00
0.00
0.00
356.0
7.5
2002456.2
7.6
76.04
76.04
100.64
114.40
0.00
0.00
0.00
360.0
7.1
19B6014.1
7.6
74.10
74.10
98.42
113.87
0.00
0.00
0.00
364.0
6.6
1969923.6
7.6
72.21
72.21
96,20
113.35
0.00
0.00
0.00
368.0
6.2
1954178.7
7.6
70.38
70.38
93.97
112.84
0.00
0.00
0.00
372.0
5.0
1938773.3
7.5
68.60
68.60
91.74
112.33
0.00
0.00
0.00
376.0
5.4
1923701.3
7.5
66.87
66.87
89.49
111.83
0.00
0.00
0.00
380.0
5.1
1908956.3
7.5
65.19
65.19
87.24
111.35
0.00
0.00
0.00
384.0
4.8
1694532.0
7.5
63.55
63.55
84.97
110.86
0.00
0.00
0.00
388.0
4.5
1880422.2
7.4
61.97
61.97
82.69
110.39
0.00
0,00
0.00
392.0
4.2
1866620.3
7.4
60.43
60.43
80,40
109.92
0.00
0,00
1100
396.0
3.9
1853120.2
7.4
58.93
58.93
78.08
109.47
0.00
0.00
0.00
400.0
3.7
1839915.4
7.4
57.48
57.48
75.75
109.02
0.00
0.00
0.00
404.0
3.4
1826999.6
7.3
58.07
56.07
73.39
108.57
0.00
0.00
0.00
408.0
3.2
1814366.6
7,3
54.70
54.70
71.00
108.14
0.00
0.00
0.00
POND700%.XLS

50 Year (Lots 100 % Imp.)
Time
min
Inflow
(cfs)
Storage
(ft"3)
Stage
n)
Outnow
cfs)
Opening (W)
(ch)
Opening (0)
cfs)
Barrel
cfs
Ortflce
cls
Weir 1
(cfs)
Weir 2
(cfs)
412.0
3.0
1802010.3
7.3
53.37
53.37
68.59
107,71
0.00
0.00
0.00
416.0
2.0
1789924.3
7.3
52,08
52.08
66.13
107.29
0.00
0.00
0.00
420.0
2.6
1778102.8
7.3
50.82
50.82
63.64
106.87
0.00
0.00
0.00
424.0
2.5
1766539.6
7.2
49,60
49.60
61.10
106.47
0.00
0.00
0.00
428.0
2.3
1755228.8
7.2
48.42
48.42
58.51
106.07
0.00
0.00
0.00
432.0
2.2
1744164.8
7.2
47.27
47.27
55.85
105,67
0.00
0.00
0.00
436.0
2.0
1733341.6
7.2
46.15
46.15
53.12
105.29
0.00
0.00
0.00
440.0
1.9
1722753.7
7.2
45.06
45.06
50.31
104.91
0.00
0.00
0.00
444.0
1.8
1712395.5
7.1
44.01
44.01
47.39
104.53
0,00
0.00
0.00
448.0
1.7
1702261.6
7.1
42.98
42.90
44.34
104.17
0.00
0.00
0.00
452.0
1.6
1692346.6
7.1
41.99
41.99
41.14
103.80
0.00
0.00
0.00
456.0
1.5
1682645.4
7.1
41.02
41.02
37.74
103.45
0.00
0.00
0.00
460.0
1,4
1673152.8
7.1
40.08
40.00
34.09
103.10
0.00
0.00
0.00
464.0
1.3
1663863.7
7.1
39.16
39.16
30.08
102.76
0.00
0,00
0.00
468.0
1.2
1654773.3
7.0
38.27
38.27
25.55
102.42
0.00
0.00
0.00
472.0
1.1
1645876.8
7.0
37.41
37.41
20.15
102.09
0.00
0.00
0.00
476.0
1.1
1637169.3
7.0
36.57
36.57
12.82
101.77
0.00
0.00
0.00
480.0
1.0
1828646.5
7.0
35.75
35.75
0.00
101.45
0.00
0.00
0.00
484.0
0.9
1620303.6
7.0
34.96
34.96
0.00
101.13
0.00
0.00
0.00
488.0
0.9
1612136.5
7.0
34.18
34. 18
0.00
100.82
0.00
0.00
0.00
492.0
0.8
1604140.7
7.0
33.43
33.43
0.00
100.52
0.00
0.00
0.00
496.0
0.8
1506312.0
6.9
32.70
32.70
0.00
100.22
0.00
0.00
0.00
500.0
0.7
1588646.5
6.9
31.99
31.99
0.00
99.93
0.00
0.00
0.00
504.0
0.7
15111140.1
6.9
31.30
31.30
0.00
99.64
0.00
0.00
0.00
508,0
0.6
1573789.0
6.9
30.62
30.62
0.00
99.36
0.00
0.00
0.00
512.0
0.8
1566689.2
6.9
29.97
29.97
0.00
99.08
0.00
0.00
0.00
516.0
0.5
1559537.2
8.9
29.33
29.33
0.00
98.81
0.00
0.00
0.00
520.0
0.5
1552629.3
6.9
28.71
28.71
0.00
98.54
0.00
0.00
0.00
524.0
0.5
1545862.1
6.8
28,11
28.11
0.00
98.27
0.00
0.00
0.00
528.0
0.5
1639232.0
6.8
27.52
27.52
0.00
98.01
0.00
0.00
0.00
532.0
0.4
1532735.7
6.8
26.05
26.95
0.00
97.76
0,00
0.00
0.00
PON D100 % .%LS

HS (Q 50 Year, 100% Imp.
Chalnsaw Routing Method
Project Name:
New Pond at Horseshoe Lake
Project p:
LFA-94020
Date :
8/24/95
Operator:
DAC
Title:
50 Year Storm - Horseshoe Lake
Weir Box / Barrel:
Hydrograph:
N barrels =
Op =
N/A CFS
Opening H
Tp =
N/A minutes
Opening L =
dT=
N/A minutes
Cw=
Zcr =
Stage -Storage :
Barrel Dia. =
Ks = 292794.0
Barrel Inv. =
b= 1.194
Cd=
Zo=
3.6 feet
Orifice:
Initial Water Level:
N =
Zi =
3.6 feel
D =
Cd =
Computed Results:
Invert =
Normal Surf. Area =
0. SF
Max. Surf, Area
417693. SF
Weir 1:
Peak Elev. =
6.10 feet
L =
Peak Stage =
2.5 feet
Zcr =
Peak Outflow =
208.44 CFS
Cw =
Volume Stored =
875502.2 ftr
Weir 2:
L=
Zcr=
Cw =
The John R. McAdams Company
P.O. Box 14005
Research Triangle Park, NC 27709
0.00
0.00 feet
0.00 feet
0.00
0.00 feet
0.00 inches
0.00 feet
0.00
1.00
27.00 inches
0.60
3.50 feet
265.00 feet
5.80 feet
2.68
150.00 feet
5.80 feet
2.68
2500 System Loading and Response
nflow
OuMow
2000
500 -
e100.0 -
Soo ,
0.0 '
00 100.0 200.0 300o 400.0 500.0 500.0
Time (min)
Time
(min)
Inflow
(cfa)
Storage
(ft^3
Stage
ftl
Outflow
cfs
Opening (W)
(cfs
Opening (0)
cfs
Bartel
cfa
Orifice
cfs)
Weir 1
(cfs)
Weir 2
cfs
0.0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
4.0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
8.0
0,0
0.0
3.6
0.00
0.00
0,00
0.00
0.00
0.00
0.00
12.0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
16.0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
20.0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
24.0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
28.0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
32.0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
36.0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
40.0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
44.0
0.0
0.0
3.6
0.00
0,00
0.00
0.00
0.00
0.00
0.00
48.0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
52.0
0,0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
58.0
2.0
0.0
3.6
0.19
0.00
0.00
0.00
0.19
0.00
0.00
60.0
7.7
436.8
3S
0.20
0.00
0.00
0.00
0.20
0.00
0.00
64.0
15.8
2228.3
3.6
0.24
0.00
0.00
0.00
0.24
0.00
0.00
68.0
25.9
5955.2
3.6
0,31
0.00
0.00
0.00
0.31
0.00
0.00
72.0
22.3
12097.2
3.7
0.42
0.00
0.00
0.00
0.42
0.00
0.00
76.0
51.3
17337.4
3.7
0.51
0.00
0.00
0.00
0.51
0.00
0.00
80.0
65.4
29518.9
3.7
0.74
0.00
0.00
0.00
0.74
0.00
0.00
84.0
80.2
45042.1
3.8
1.03
0,00
0.00
0.00
1.03
0.00
0.00
88.0
95.1
64030.7
3.9
1.41
0.00
0.00
0.00
1.41
0.00
0.00
92.0
109,8
86513.1
4.0
1.88
0.00
0.00
0.00
1.88
0.00
0.00
96.0
124.1
112424.2
4.0
2.45
0.00
0.00
0.00
2.45
0.00
0.00
100.0
128.5
141610.5
4.1
3.12
0.00
0.00
0.00
3.12
0.00
0.00
104.0
130.9
171698.2
4.2
3.83
0.00
0.00
0.00
3.83
0.00
0.00
108.0
139.8
202193.8
4.3
4.58
0.00
0.00
0.00
4.58
0.00
0.00
112.0
154.0
234651.3
4.4
5.41
0.00
0.00
0.00
5.41
0.00
0.00
116.0
169.3
270309.2
4.5
6.35
0.00
0.00
0.00
6.35
0.00
0.00
120.0
184.1
309416.1
4.6
7.41
0.00
0.00
0.00
7.41
0.00
0.00
124.0
197A
351817.1
4.8
8.59
0.00
0.00
0.00
8.59
0.00
0.00
128.0
208.7
397129.0
4.9
9.88
0.00
0.00
0.00
9.88
0.00
0.00
132.0
217.8
444845.0
5.0
11.29
0.00
0.00
0.00
11.29
0.00
0.00
136,0
224.8
494405.9
5.2
12.78
0.00
0.00
0.00
12.78
0.00
0.00
POND100%4XLS

HS @ 50 Year, 100 % Imp.
M/4 �Z
Time
(min)
Inflow
cfs)
Storage
ft
Stage
tt)
Outflow
(cis)
Opening (W)
(cis
Opening (0)
cts
Barrel
cts
Oriflce
(cfs)
Weir 1
(ch)
Weir 2
(cfs)
140.0
229.3
545248.7
5.3
14.35
0.00
0.00
0.00
14.35
0.00
0.00
144.0
232.0
596838.2
5.4
15.98
0.00
0.00
0.00
15.98
0.00
0.00
148.0
233.0
648686.8
5.5
17.65
0.00
0.00
0.00
17.65
0.00
0.00
152.0
232.4
700364.1
5.7
19.34
0.00
0.00
0.00
19.34
0.00
0.00
156.0
230.6
751501.0
5.8
20.85
0.00
0.00
0.00
20.74
0.07
0.04
160.0
227.7
801836.7
5.9
70.99
0.00
0.00
0.00
21.79
31.41
17.78
164.0
224.0
839449.4
6.0
134,25
0.00
0.00
0.00
22.54
71.33
40.37
168.0
219.6
860986.0
6.1
177.16
0.00
0.00
0.00
22.96
98.46
55.73
172.0
214.7
871172.7
6.1
198.92
0.00
0.00
0.00
23.15
112.24
63.53
176.0
209.5
874965.5
6.1
207.25
0.00
0.00
0.00
23.23
117.51
66.52
180.0
204.0
875502.2
6.1
208.44
0.00
0.00
0.00
23.24
118.26
66.94
184.0
198.4
874438.8
6.1
206.09
0.00
0.00
0.00
23.22
116.77
66.10
188.0
192.7
872591.0
6.1
202.02
0.00
0.00
0.00
23.18
114.20
64.64
192.0
187.0
870355.9
6.1
197.14
0.00
0.00
0.00
23.14
111.11
62.89
196.0
1814
867931.5
6.1
191.90
0.00
0.00
0.00
23.09
107.79
61.01
200.0
176.0
865422.0
6.1
186.53
0.00
0.00
0.00
23.04
104.39
59.09
204.0
170.6
862886.7
6.1
181.15
0.00
0.00
0.00
23.00
100.99
57.16
208.0
165.5
860362.8
6.1
175.86
0.00
0.00
0.00
22.95
97.64
55.27
212.0
160.6
857876.2
6.1
170.70
0.00
0,00
0.00
22.90
94.38
53.42
216,0
155.0
855446.3
6.1
165.71
0.00
0.00
0.00
22.85
91.22
51.63
220.0
151.5
853089.5
6.0
160.92
0.00
0.00
0.00
22.81
88.19
49.92
224.0
147.3
$50820.1
6.0
156.36
0.00
0.00
0.00
22.78
85.31
48.29
228.0
143.5
848651.9
6.0
152.05
0.00
0.00
0.00
22.72
82.58
46.74
232.0
140.0
846598.8
6.0
148.01
0.00
0.00
0.00
22.68
80.02
45.30
236.0
136.9
844676.7
6.0
144.26
0.00
0.00
0.00
22.65
77.66
43.96
240.0
134.2
842904.7
6.0
140.83
0.00
0.00
0.00
22.61
75.49
42.73
244.0
132.1
841309.6
6.0
137.78
0.00
0.00
0.00
22.58
73.56
41.64
248.0
130.9
839936.8
6.0
135.17
0.00
0.00
0.00
22.55
71.91
40.70
252.0
130.4
838919.6
6.0
133.25
0.00
0.00
0.00
22.53
70.70
40.02
256.0
129.8
838228.6
6.0
131.95
0.00
0.00
0.00
22.52
69.88
39.55
260.0
129.2
837710.4
6.0
130.98
0.00
0.00
0.00
22.51
69.26
39.21
264.0
120.6
837282.0
6.0
130.18
0.00
0.00
0.00
22.50
68.76
38.92
268.0
128.0
836898.9
6.0
129.46
0.00
0.00
0.00
22.49
68.31
38.66
272.0
127.3
836536.6
6.0
128.79
0.00
0.00
0.00
22.49
67.88
38.42
276.0
126.7
836182.1
6.0
128.13
0.00
0.00
0.00
22.48
67.46
38.19
280.0
125.1
835828.3
6.0
127.47
0.00
0.00
0.00
22.47
67.05
37.95
284.0
121.9
835263.5
6.0
126.43
0.00
0.00
0.00
22.46
66.39
37.58
288,0
118.8
834178.0
6.0
124.43
0.00
0.00
0.00
22.44
65.13
36.86
292.0
115.7
832818.0
8.0
121.95
0.00
0.00
0.00
22.41
63.56
35.98
296.0
112.7
831318.1
6.0
119.23
0.00
0.00
0.00
22.38
61.84
35.00
300.0
109.8
829751.8
6.0
116.41
0.00
0.00
0.00
22.35
60.06
34.00
304.0
106.9
828159.3
6.0
113.58
0.00
0.00
0.00
22.32
58.27
32.98
308.0
104.1
826562.8
6.0
110.77
0.00
0.00
0.00
22.29
56.50
31.98
312.0
101.4
824974.6
6.0
107.99
0.00
0.00
0.00
22.26
54.75
30.99
316.0
98.8
823401.6
6.0
105.28
0.00
0.00
0.00
22.23
53.03
30.02
320.0
96.2
621847.6
6.0
102.62
0.00
0.00
0.00
22.20
51.35
29.07
324.0
93.7
820314.8
6.0
100.03
0.00
0.00
0.00
22.17
49.72
28.14
328.0
91.3
818804.6
6.0
97.50
0.00
0.00
0.00
22.14
48.12
27.24
332.0
88.9
817317.4
6.0
95,03
0.00
0.00
0.00
22.11
46.57
26.36
336.0
86.6
815853.6
6.0
92.63
0.00
0.00
0.00
22.08
45,05
25.50
340.0
84.4
814413.4
6.0
90.29
0.00
0.00
0.00
22.05
43.58
24.67
344.0
82.2
812996.7
6.0
88.02
0.00
0.00
0.00
22.02
42.14
23.86
348.0
80.1
811603.4
5.9
85.81
0.00
0.00
0.00
21.99
40.75
23.07
352.0
78.0
810233.2
5.9
83.65
0.00
0.00
0.00
21.06
39.39
22.30
356.0
76.0
808886.1
5.9
81.56
0.00
0.00
0.00
21.94
38.07
21.55
360.0
74.1
807561.7
5.9
79.52
0.00
0.00
0,00
21.91
36.79
20.82
364.0
72.2
806259.7
5.9
77.54
0.00
0.00
0.00
21.88
35.54
20.12
368.0
70.4
804979.9
5.9
75,62
0.00
0.00
0.00
21.86
34.33
19.43
372.0
68.6
803721.8
5.9
73.75
0.00
0.00
0.00
21.83
33.15
18.77
376.0
66.9
802485.3
5.9
71.93
0.00
0.00
0.00
21.81
32.01
18.12
380.0
65.2
801269.8
5.9
70.16
0.00
0.00
0.00
21.78
30.89
17.49
384.0
63.6
800075.0
5.9
68.45
0.00
0.00
0.00
21.76
29.81
16.88
388.0
62.0
798900.6
5.9
66.78
0.00
0.00
0.00
21.73
28.76
16.28
392.0
60.4
797746.2
5.9
65.16
0.00
0.00
0.00
21.71
27.74
15.70
396.0
58.9
79fi611.3
5.9
63.58
0.00
0.00
0.00
21.89
26.75
15,14
400.0
57.5
795495.7
5.9
62.05
0.00
0.00
0.00
21.68
25.79
14.60
404.0
56,1
794398.8
5.9
60.56
0.00
0,00
0.00
21.64
24.85
14.07
408.0
54.7
793320.3
5.9
59.12
0.00
0.00
0.00
21.62
23.95
13.55
POND100%.XLS

HS @ 50 Year, 100% Imp,
35/4z
Time
min)
Inflow
(cfs)
Storage
(ft"J
Stage
ft
Outflow
cfs
Opening (W)
cfs
Opening (0)
cfs
Barrel
cfs)
Orifice
(cfs)
Weir t
cfs
Weir 2
(cfs)
412.0
53.4
792259.7
5.9
57.72
0.00
0.00
0.00
21.60
23.06
13.05
416.0
52.1
791216.7
5.9
56.35
0.00
0.00
0.00
21,58
22.21
12.57
420.0
50.8
790190.9
5.9
55.03
0.00
0.00
0.00
21.56
21.37
12.10
424.0
49.6
789181.8
5.9
53.74
0.00
0.00
0.00
21.53
20.56
11.64
428.0
48.4
788189.1
5.9
52.49
0.00
0.00
0.00
21.51
19.78
11.20
432.0
47.3
787212.3
5.9
51.27
0.00
0,00
0.00
2149
19.01
10.76
436.0
46.1
786251.1
5.9
50.09
0.00
0.00
0.00
21.47
18.27
10.34
440.0
45.1
785305.0
5.9
48.94
0.00
0.00
0.00
21.45
17.55
9.94
444.0
44.0
784373.6
5.9
47.83
0.00
0.00
0.00
21.44
16.85
9.54
440.0
43.0
783456.6
5.9
46.75
0.00
0.00
0.00
21.42
16.17
9.16
452.0
42.0
782553.4
5.9
45.69
0.00
0.00
0.00
21.40
15.51
8.78
456.0
41.0
781663.9
5.9
44.67
0.00
0.00
0.00
21.38
14.87
8.42
450.0
40.1
780787.4
5.9
43.68
0.00
0.00
0.00
21.36
14.25
8.07
464.0
39.2
779923.7
5.9
42.71
0.00
0.00
0.00
21.34
13.64
7.72
468.0
38.3
779072.4
5.9
41.77
0.00
0.00
0.00
21.32
13.06
7.39
472.0
37.4
778233.1
5.9
40.86
0.00
0.00
0.00
21.31
12.48
7.07
476.0
36.6
777405.3
5.9
39.97
0.00
0.00
0.00
21.29
11.93
6.75
480.0
35.8
776588.8
5.9
39.11
0.00
0.00
0.00
21.27
11.39
6.45
484.0
35.0
775783.0
5.9
38.27
0.00
0.00
0.00
21.26
10.66
6.15
488.0
34.2
774987.7
5.9
37.46
0.00
0.00
0.00
21.24
10.36
5.86
492.0
33.4
774202.4
5.9
36.66
0.00
0.00
0.00
21.22
9.86
5.58
496.0
32.7
773426.8
5.9
35.89
0.00
0.00
0.00
21.21
9.38
5.31
500.0
32.0
772660.4
5.9
35.15
0.00
0.00
0.00
21.19
8.91
5.04
504.0
31.3
771902.9
5.9
34.42
0.00
0.00
0.00
21.17
8.46
4.79
508.0
30.6
771153.9
5.9
33.71
0.00
0.00
0.00
21.16
8.02
4.54
512.0
30.0
770412.9
5.8
33.02
0.00
0,00
0.00
21.14
7.59
4.29
516.0
29.3
769679.7
5.8
32.36
0.00
0.00
0.00
21.13
7.17
4.06
520.0
28.7
768953.7
5.8
31.71
0.00
0,00
0.00
21.11
6.77
3.83
524.01
28.11
768234.6
5.8
31.08
0.00
0.00
0.00
21.10
6.37
3.61
528.0
27.5
767521.9
5.8
30.46
0.00
0.00
0.00
21.08
5.99
3.39
532.0
26.91
766815.2
5.8
29.87
0.00
0.00
0.00
21.07
5.62
3.18
POND100%.X15

100 Year (Lots 100 % Imp.)
Chalnsaw, Routing Method
Project Name:
New Pond at Horseshoe Lake
Project If
LFA-94020
Date :
8/24/95
Operator:
DAC
Title:
100 Year Storm
The John R. McAdams Company
P.O. Box 14005
Research Triangle Park, NC 27709
Weir Box / Barrel:
Hydrograph:
Nbarrels=
2.00
Op = 650.0 CFS
Opening H
2.00 feet
To= 83.2 minutes
Opening L=
12.00 feet
dT= 4.0 minutes
Cw=
3.00
Zcr =
6.00 feet
Stage -Storage :
Barrel Dia. =
24.00 inches
Ks = 358260.0
Barrel Inv. =
3.60 feet
b= 1.210
Cd=
0.65
Zo= 3.5 feet
Orifice:
Initial Water Level :
N =
0.00
Z1= 5.0 feet
D =
0.00 inches
Cd =
0.00
Computed Results :
Invert =
0.00 feet
Normal Surf, Area = 472023. SF
Max. Surf. Area = 631964. SF
Weir 1:
Peak Elev. = 9.52 feet
L =
50.00 feet
Peak Stage= 6.0 feet
Zcr=
8.60 feet
Peak Outflow307.93 CFS
Sideslope=
10.00 MA
Volume Stored = 2558779.8 ftx
Weir 2:
L =
0.00 feet
Zcr=
0.00 feet
Cw =
0.00
700.0 System Loading and Response
600.0 Inaaw
O mow
500.0
-400.0
s300 0
LL200.0
100 0
00
0.0 50.0 100.0 150.0 2000.
Time (min)
Time
(min)
Inflow
(cfs)
Storage
(ft
Stage
fit
Outflow
cfs
Opening (W)
cfs
Opening (0)
cfs
Barrel
cfa
Orifice
(cfs)
Weir 1
(cfs)
Weir 2
cfs
0.0
0.0
585152.1
5.0
0.00
0.00
0.00
0.00
0.00
0.00
0.00
4.0
3.7
585152.1
5.0
0.00
0.00
0.00
0.00
0.00
0.00
0.00
8.0
14.7
586040.1
5.0
0.00
0.00
0.00
0.00
0.00
0.00
0.00
12.0
32.8
589571.0
5.0
0.00
0.00
0.00
0.00
0.00
0.00
0.00
16.0
57.5
597443.0
5.0
0.00
0.00
0.00
0.00
0.00
0.00
0.00
20.0
88.4
611250.2
5.1
0.00
0.00
0.00
0.00
0.00
0.00
0.00
24.0
124.6
632455.2
5.1
0.00
0.00
0.00
0.00
0.00
0.00
0.00
28.0
165.3
662351.2
5.2
0.00
0.00
0.00
0.00
0.00
0.00
0.00
32.0
209.8
702033.3
5.2
0.00
0.00
0.00
0.00
0.00
0.00
0.00
36.0
256.8
752374A
5.3
0.00
0.00
0.00
0.00
0.00
0.00
0.00
40.0
305.4
814003.4
5.5
0.00
0.00
0.00
0.00
0.00
0.00
0.00
44.0
354.4
887293.9
5.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
48.0
402.8
972352.8
5.8
0.00
0.00
0.00
0.00
0.00
0.00
0.00
52.0
449.4
1069019.4
6.0
0.00
0.00
0.00
0.00
0.00
0.00
0.00
56.0
493.1
1176868.7
5.2
2.57
2.57
0.00
82.19
0.00
0.00
0.00
60.0
533.1
1294603.2
6.4
8.81
8.81
0.00
87.73
0.00
0.00
0.00
64.0
568.3
1420424.2
6.6
17.65
17.65
0.00
93.20
0.00
0.00
0.00
68.0
597.9
1552572A
6.9
28.71
28.71
0.00
98.54
0.00
0.00
0.00
72.0
621.4
1689184.7
7.1
40.06
41.67
40.06
103.69
0.00
0.00
0.00
76.0
838A
1828697.5
7.3
56.26
56.26
73.70
108.63
0.00
0.00
0.00
80.0
647.6
1968331A
7.6
72.03
72.03
95.98
113.30
0.00
0.00
0.00
84.0
649.9
2106476.5
7.8
88.64
88.64
113.60
117.68
0.00
0.00
0.00
88.0
644.7
2241166.2
8.1
105.72
105.72
128.32
121.76
0.00
0.00
0.00
92.0
632.2
2370515.7
8.3
122.86
122.86
140.90
125.51
0.00
0.00
0.00
96.0
612.8
2492763.6
8.5
128.93
139.66
151.73
128.93
0.00
0.00
0.00
100.0
586A
2608886.2
8.7
134.42
156.14
161.27
132.07
0.00
2.36
0.00
104.0
554.8
2717449.9
8.8
154.08
171.96
189.65
134.91
0.00
19.17
0.00
108.0
521.8
2813625.2
9.0
179.28
186.31
176.69
137.37
0.00
41.92
0.00
112.0
490.2
2895837.1
9.1
205.54
198.80
102.46
139.42
0.00
66.12
0.00
116.0
460.5
2964158.6
9.2
230.38
209.34
187.10
141.10
0.00
89.29
0.00
120.0
432.6
3019390.2
9.3
252.37
217.95
190.76
142.43
0.00
109.94
0.00
124.0
406.4
3062649.2
9.4
270.74
224.77
193.57
143.47
0.00
127.27
0.00
128.0
381.8
3095208.5
9.4
285.22
229.93
195.65
144.24
0.00
140.98
0.00
132.0
358.6
3118382.7
9.5
295.87
233.62
197.11
144.79
0.00
151.08
0.00
136.0
336.9
3133450.4
9.5
302.94
236.03
198.06
145.14
0.00
157.80
0.00
POND100%,XLS

100 Year (Lots 100 % Imp.)
Time
min
Inflow
cfs
Storage
ft^3
Stage
tt)
Outflow
cfs)
Opening (W)
cfs
Opening (0)
cfs
Barrel
(cfs(
Orifice
(cfs)
Weir 1
cfs)
Weir 2
cfs
140.0
316.5
3141605.9
9.5
306.82
237.33
198.57
145.33
0.00
161.49
0.00
144.0
297.3
3143931.8
9.5
307.93
237.70
198.72
145.38
0.00
162.54
0.00
148.0
279.3
3141388.7
9.5
306.71
237.30
198.56
145.32
0.00
161.39
0.00
152.0
262.4
3134813.8
9.5
303.58
236.24
198.15
145.17
0.00
158.41
0.00
156.0
246.5
3124927.9
9.5
298.93
234.66
197.53
144.94
0.00
153.99
0.00
160.0
231.6
3112345.0
9.5
293.07
232.66
196.73
144.64
0.00
148.42
0.00
164.0
217.5
3097583.7
9.4
286.30
230.30
195.80
144.30
0.00
142.01
0.00
168.0
204.4
3081079.4
9.4
278.87
227.68
194.75
143.90
0.00
134.96
0,00
172.0
192.0
3063195.5
9,4
270.98
224.85
193.60
143.48
0.00
127.50
0.00
176.0
180.3
3044233.9
9,4
262.80
221.86
192.38
143.03
0.00
119.77
0.00
160.0
169.4
3024444.3
9.3
254.46
218.75
191.09
142.55
0.00
111.91
0.00
184.0
159.1
3004032.6
9.3
246.09
215.55
189.75
142.06
0.00
104.03
0.00
188.0
149.5
2983167.3
9.3
237.76
212.29
188.37
141.56
0.00
96.20
0.00
192.0
140.4
2961986.4
9.2
229.55
209.00
186.96
141.04
0.00
88.51
0.00
196.0
131.9
2940601.3
9.2
221.52
205.69
185.52
140.52
GM
81.00
0.00
200.0
123.9
2919102.1
9.2
213.70
202.37
184.06
139.99
0.00
73.71
0.00
204.0
116.4
2897560.3
9.1
206.14
199.06
182.58
139.46
0.00
66.67
0.00
208.0
109.4
2876032.3
9.1
198.85
195.77
181.09
138.93
0.00
59.92
0.00
212.0
102.8
2854561.1
9.1
191.85
192.50
179.59
138.39
0.00
53.45
0.00
216.0
96.5
2833179.1
9.0
185.15
189.26
178.08
137.86
0.00
47.30
0.00
220.0
90.7
2811909.0
9.0
178.78
186.05
176.56
137.32
0.00
41.46
0.00
224.0
85.2
2790765.4
9.0
172.73
182.87
175.04
136.79
0.00
35.94
0.00
228.0
80.0
2769755.9
8.9
167.00
179.73
173.52
136.25
0.00
30.75
0.00
232.0
75,2
2748681.3
8.9
161.61
176.62
17l.98
135.72
0.00
25.89
0.00
238.0
70.6
2728136.9
8.9
156.56
173.54
170.44
135.19
0.00
21.37
0.00
240.0
66.3
2707512.0
8.8
151.85
170.50
168.90
134.65
0.00
17.20
0.00
244.0
62.3
2686990.2
8.8
147.49
167.48
167.34
134.12
0.00
13.37
0.00
248.0
58.5
2666549.5
8.8
143.50
164.49
165.78
133.59
0.00
9.91
0.00
252.0
55.0
2646160.5
8.7
139.90
161.53
164.20
133.05
0.00
6.84
0.00
250.0
51.7
2625785.8
8.7
136.71
158,57
162.61
132.51
0.00
4.19
0.00
260.0
40.5
2605376.7
8.7
134.00
155.63
160.99
131.97
0.00
2.02
0.00
264.0
45.6
2584867.0
8.6
131.89
152.69
159.35
131.43
0.00
0.46
0.00
268,0
42.8
2564156.9
8.6
130.87
149.73
157.67
130.87
0.00
0.00
0.00
272.0
40.2
2543028.6
8.6
130.30
146.73
155.94
130.30
0.00
0.00
0.00
276.0
37.8
2521414.2
8.5
129.71
143.68
154.15
129.71
0.00
0.00
0.00
280.0
35.5
2499355.5
8.5
129.11
140,58
152.29
129.11
0.00
0,00
0.00
284.0
33.4
2476891.8
8.4
128.49
137.45
150.37
128.49
0.00
0.00
0.00
288.0
31.3
2454059.9
8.4
127.86
134.28
148.40
127.86
0.00
0.00
0.00
292.0
29.4
2430894.5
8.4
127.22
131.08
146.36
127.22
0.00
0.00
0.00
296.0
27.7
2407428.3
8.3
126.56
127.87
144.27
126.56
0.00
0.00
0.00
300.0
26.0
2303691.8
8.3
124.64
124.64
142.11
125.89
0.00
0.00
0.00
304.0
24.4
2360013.7
8.2
121.44
121.44
139.92
125.21
0.00
0.00
0.00
308.0
22.9
2336725.8
8.2
118.31
118.31
137.74
124.55
0.00
0.00
0.00
312.0
21.5
2313833.2
8.2
115.26
115.26
135.55
123.89
0.00
0.00
0.00
316.0
20.2
2291339.6
8.1
112.28
112.28
133.36
123.23
0.00
0.00
0.00
320.0
19.0
2269247.3
8.1
109,38
109.38
131.17
122.59
0.00
0.00
0.00
324.0
17.9
2247557.7
8.1
106.55
106.55
128.98
121.95
0.00
0.00
0.00
328.0
16.8
2226271.0
8.0
103.79
103.70
126.79
121.32
0.00
0.00
0.00
332.0
15.8
2205386.7
8.0
101.11
101.11
124.60
120.70
0.00
0.00
0.00
336.0
14.8
2184903.3
8.0
98.49
98.49
122.41
120.08
0.00
0.00
0.00
340.0
13.9
2164818.9
7.9
95.94
95.94
120.22
119.47
0.00
0.00
0.00
344.0
13.1
2145130.7
7.9
93.46
93.46
118.03
118.87
0.00
0.00
0.00
348.0
12.3
2125835.4
7.9
91.05
91.05
115.85
118.28
0.00
0.00
0.00
352.0
11.5
2106929.2
7.8
88.70
88.70
113.66
117.70
0.00
0.00
0,00
356.0
10.8
2088407.9
7.8
86.42
86.42
111.47
117.12
0.00
0.00
0.00
360.0
10.2
2070266.9
7.8
84.20
84.20
109.28
116.56
0.00
0.00
0.00
364.0
9.6
2052501.3
7.7
82.04
82.04
107.09
116.00
0.00
0.00
0.00
368.0
9.0
2035105.9
7.7
79.94
79.94
104.89
115.45
0.00
0.00
0.00
372.0
8.4
2018075.2
7.7
77.90
77.90
102.70
114.90
0.00
0.00
0.00
376.0
7.9
2001403.6
7.6
75.92
75.92
100.50
114.37
0.00
0.00
0.00
380.0
7.4
1985085.3
7.6
73,99
73.99
98.30
113.84
0,00
0.00
0.00
384.0
7.0
1969114.2
7.6
72.12
72.12
96.09
113.32
0.00
0.00
0.00
388.0
6.6
1953484.2
7.6
70.30
70.30
93.87
112.81
0.00
0.00
0.00
392.0
6.2
1938189.3
7.5
68.53
68.53
91.65
112.31
0.00
0.00
0.00
396.0
5.8
1923223.2
7.5
66.81
66.81
89.42
111.82
0.00
0.00
0.00
400.0
5.4
1908579.6
7.5
85.14
65.14
87.18
111.33
0.00
0.00
0.00
404.0
5.1
1894212.1
7.5
63.52
63.52
84.93
110.85
0.00
0.00
0.00
408.0
4.8
1880234.5
7.4
61.95
61.95
82.66
110.38
0,00
0.00
0.00
POND100%.XLS

100 Year (Lots 100% Imp.)
1644
Time
min
Inflow
cfs)
Storage
f A3
Stage
(ft
Outflow
cfs)
Opening (W)
cfs
Opening (0)
cfs
Barrel
cfs
Orifice
(cfs)
Weir 1
(cfs)
Weir 2
(cfs)
412.0
4.5
1866520.6
7.4
6042
60.42
80.38
109.92
0.00
0.00
0,00
416.0
4.2
1853103.9
7.4
58.93
68.93
78.08
109.47
0.00
0.00
0.00
420.0
4.0
1839978.2
7.4
57.49
57.49
75.76
109.02
0.00
0.00
0.00
424.0
3.7
1827137.4
7.3
56.09
56.09
73,41
108.58
0.00
0.00
0.00
428.0
3.5
1814575.2
7.3
54.72
54.72
71.04
108.14
0.00
0.00
0.00
432.0
3.3
1802285.6
7.3
5340
53.40
68,64
107.72
0.00
0.00
0.00
436.0
3.1
1790262.6
7.3
52.11
52.11
66,20
107.30
0.00
0.00
0.00
440.0
2.9
1778500.1
7.3
50.86
50.86
63.73
106.89
0.00
0.00
0.00
444.0
2.7
1766992.4
7.2
49.65
49.65
61.20
106.48
0.00
0.00
0.00
448.0
2.6
1755733.7
7.2
48.47
48.47
58.63
106.08
0.00
0.00
0.00
452.0
2.4
1744718.2
7.2
47.32
47,32
55.99
105.89
0.00
0.00
0.00
456.0
2.3
1733940.3
7.2
46.21
46.21
53.28
105.31
0.00
0.00
0.00
460.0
2.1
1723394.5
7.2
45.13
45.13
50.48
104.93
0.00
0.00
0.00
464.0
2.0
1713075.5
7.1
44.08
44.08
47.58
104.56
0.00
0.00
0.00
468.0
1.9
1702977.8
7.1
43.05
43.05
44.56
104.19
0.00
0.00
0.00
472.0
1.8
1693096.3
7.1
42.06
42.06
41.39
103.83
0.00
0.00
0.00
476.0
1.7
1683426.0
7.1
41.10
41.10
38.03
103.48
0.00
0.00
0.00
480.0
1.6
1673961.7
7.1
40.16
40.16
34.41
103.13
0.00
0.00
0.00
484.0
1.5
1664698.5
7.1
39.24
30.24
30.46
102.79
0.00
0.00
0.00
488.0
14
1655631.7
7.0
38.36
38.36
26.01
102.45
0.00
0.00
0.00
492.0
1.3
1646756.6
7.0
37.49
37.49
20.75
102.12
0.00
0.00
0.00
496.0
1.2
1638068.6
7.0
36.65
36.65
13.76
101.80
0.00
0.00
0.00
500.0
1.1
1629563.1
7.0
35.84
35.84
0.00
101.48
0.00
0.00
0,00
504.0
1.1
1621235.8
7.0
35.04
35.04
0.00
101.17
0.00
0.00
0.00
508.0
1.0
1613082.4
7.0
34.27
34.27
0.00
100.86
0.00
0.00
0.00
512.0
0.9
1605098.7
7.0
33.52
33.52
0.00
100.56
0.00
0.00
0.00
516.0
0.9
1597280.6
6.9
32.79
32.79
0.00
100.26
0.00
0.00
0.00
520.01
0.8
1689624.1
6.9
32.08
32.08
0.00
99.97
0.00
0.00
0.00
524.0
0.8
1582121.4
8.9
31.39
31.39
0.00
99.68
0,00
0.00
0.00
528.0
0.7
1574780.5
8.9
30.71
30.71
0.00
99.40
0.00
0.00
0.00
532.0
0.7
1567585.8
6.9
30.06
30.06
0.00
99.12
0.00
0.00
0.00
POND100%.XLS

4 '
HS ® 100 Year, 100% Imp.
Chalnsaw Routing Method
Project Name.
New Pond at Horseshoe Lake
Project #:
LFA-94020
Date:
8124/95
Operator:
DAC
Title:
100 Year Storm -- Horseshoe Lake
Weir Box / Barrel:
Hydrograph:
N barrels =
Dp =
N/A CFS
Opening H
Tp =
N/A minutes
Opening L =
dT =
NIA minutes
Cw =
Zcr=
Stage -Storage :
Barrel Dia. _
Ks = 292794.0
Barrel Inv. _
b= 1.194
Cd=
Zo =
3.6 feet
Orifice:
Initial Water Level :
N =
Zi =
3.6 feet
D =
Cal =
Computed Results
:
Invert =
Normal Surf. Area =
0. SF
Max. Surf. Area =
420303, SF
Weir 1:
Peak Elev. =
6.18 feet
L =
Peak Stage =
2.6 feet
Zcr =
Peak Outflow =
288.87 CFS
CW =
Volume Stored =
909719.2 fly
Weir 2:
L=
Zcr =
Cw =
The John R. McAdams Company
P.O. Box 14005
Research Triangle Park, NC 27709
0.00
0.00 feet
0.00 feet
0.00
0.00 feet
0.00 inches
0.00 feet
0.00
1.00
27.00 inches
0.60
3.50 feet
265.00 feet
5.80 feet
2.68
150.00 feet
5.80 feet
2.68
350,0 System Loading and Response
innow
300.0
OutSax
250.0
-200.0
11500
C
'
100 0
50.0
0.0
00 100.0 200.0 300.0 400.0 500.0 60)0
Thre(min)
Time
(min)
Inflow
cfs
Storage
(f -3)
Stage
(ft
Outflow
(cfs)
Opening (W)
cis
Opening (0)
cfa
Barrel
cfs
Orifice
cfs
Weir 1
cfs
Weir 2
cfs
0.0
0.0
0.0
3.8
0.00
0.00
0.00
0.00
0.00
0.00
0,00
4.0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
8.0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
12.0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
16.0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
20.0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
24.0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
28.0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
32.0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
36.0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
40.0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
44.0
0.0
0.0
3.8
0.00
0.00
0.00
0.00
0.00
0.00
0.00
48.0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
52.0
0.0
0.0
3.6
0.00
0.00
0.00
0.00
0.00
0.00
0.00
56.0
2.6
0.0
3.6
0.19
0.00
0.00
0.00
0.19
0.00
0.00
80.0
8.8
572.2
3.6
0.21
0.00
0.00
0.00
0.21
0.00
0.00
64.0
17.6
2638.2
3.6
0.25
0.00
0.00
0.00
0.25
0.00
0.00
68.0
28.7
6814.3
3.6
0.33
0.00
0.00
0.00
0.33
0.00
0.00
72.0
40.1
13625.5
3.7
0.45
0.00
0.00
0.00
0.45
0.00
0.00
76.0
56.3
23133.6
3.7
0.62
0.00
0.00
0.00
0.62
0.00
0.00
80.0
72.0
36486.2
3.8
0.87
0.00
0.00
0.00
0.87
0.00
0.00
84.0
88.6
53564.1
3.8
1.20
0.00
0.00
0.00
1.20
0.00
0.00
88.0
105.7
74550.7
3.9
1.63
0.00
0.00
0.00
1.83
0.00
0.00
92.0
122.9
99532.7
4.0
2.16
0,00
0.00
0.00
2.16
0.00
0.00
96.0
128.9
128499.0
4.1
2.81
0.00
0.00
0.00
2.81
0.00
0.00
100.0
134A
158766.9
4.2
3.52
0.00
0.00
0.00
3.52
0,00
0.00
104.0
154.1
190183.2
4.3
4.29
0.00
0.00
0.00
4.29
0.00
0.00
1080
179.3
226133.7
4A
5.19
0.00
0.00
0.00
5.19
0.00
0.00
112.0
205.5
267915.5
4.5
6.28
0.00
0.00
0.00
6.28
0.00
0.00
116.0
230.4
315737.7
4.7
7.58
0,00
0.00
0.00
7.58
0.00
0.00
120.0
252.4
369210.6
4.8
9.08
0.00
0.00
0.00
9.08
0.00
0.00
124.0
270.7
427599.7
5.0
10.78
0.00
0.00
0.00
10.78
0.00
0.00
128.0
285.2
489990,9
5.1
12.65
0.00
0.00
0,00
12.65
0.00
0.00
132.0
295.9
555408.7
5.3
14.67
0.00
0.00
0.00
14.67
0.00
0.00
136.0
302.9
622896.4
5.5
16.81
0.00
0.00
0.00
16.81
0.00
0.00
POND100 % .XLS

4.
HS @ 100 Year, 100 % Imp.
Time
min)
Inflow
(cfs)
Storage
(ft"J
Stage
ft)
Outflow
cfs)
Opening (W)
(cfs)
Opening (0)
cfs
Barrel
cfs
Orifice
(cfs
Welr 1
cfs)
Weir 2
(cfs)
140.0
306.8
691568.6
5.7
19.05
0.00
0.00
0.00
19.05
0.00
0.00
144.0
307.9
760629.7
5,8
25.22
0.00
0.00
0.00
20.93
2.73
1.55
148.0
306.7
828480.1
&0
114.15
0.00
0.00
0.00
22.33
58.63
33.19
152.0
303.6
874695.5
6.1
206.65
0.00
0.00
0.00
23.22
117.13
66.30
156.0
298.9
897959.0
6.2
260.22
0.00
0.00
0.00
23.85
151.06
85.51
160.0
293.1
907247.5
6.2
282.77
0.00
0.00
0.00
23.82
165.35
93.59
164.0
286.3
909719.2
6.2
288.87
0.00
0.00
0.00
23.87
169.22
95.78
168.0
278.9
009101.6
6.2
287.34
0.00
0.00
0.00
23.86
168.25
95.24
172.0
271.0
907067.6
6.2
282.33
0.00
0.00
0.00
23.82
165.07
93.44
176.0
262.8
904344.2
6.2
275.65
0,00
0.00
0.00
23.77
160.84
91.04
180.0
254.5
901258.7
6.2
268.16
0,00
0.00
0.00
23.71
156.09
88.35
184.0
246.1
B97971.6
6.2
260.25
0,00
0.00
0.00
23.65
151.08
85.52
188.0
237.8
894572.0
6.1
252.16
0.00
0.00
0.00
23,59
145.95
82.62
192.0
229.6
891116.0
6.1
244.03
0.00
0.00
0.00
23.53
140.80
79.70
196.0
221.5
887642.6
6.1
235.94
0.00
0.00
0.00
23.46
135.68
76.80
200.0
213.7
884181.2
6.1
227.98
0.00
0.00
0.00
23.40
130.64
73,95
204.0
206.1
880754.7
6.1
220.19
0.00
0.00
0.00
23.33
125.70
71.15
208.0
198.8
077381.3
6.1
212.62
0.00
0,00
0.00
23.27
120.91
68.44
212.0
191.8
874075.9
6.1
205.29
0.00
0.00
0.00
23.21
116.27
65.81
216.0
185.2
870850.4
6.1
198.22
0.00
0.00
0.00
23.15
111.79
63.28
220.0
178.8
867714.8
6.1
191.43
0.00
0.00
0.00
23.09
107.50
60.85
224.0
172.7
864677.6
6.1
184.94
0.00
0.00
0.00
23.03
103.39
58,52
228.0
167.0
861745.9
6.1
178.75
0.00
0.00
0.00
22.97
99.47
56.30
232.0
161.6
858926.2
6.1
172.87
0.00
0.00
0.00
22.92
95.75
54.20
236.0
156.6
856224.6
6.1
167.30
0.00
0.00
0.00
22.87
92.23
52.20
240.0
151.9
853646.8
6.1
162.05
0.00
0.00
0.00
22.82
88.91
50.32
244.0
147.5
851199.4
6.0
157.12
0.00
0.00
0.00
22.77
85.79
48.56
248.0
143.5
848889.4
6.0
152.52
0.00
0.00
0.00
22.73
82.88
46.91
252.0
139.9
846725.6
6.0
148.25
0.00
0.00
0.00
22.69
80.18
45.39
258.0
136.7
844719.6
6.0
144.34
0.00
0.00
0.00
22.65
77.71
43,99
260.0
134.0
842887.3
6.0
140.80
0.00
0.00
0.00
22.61
75.47
42.72
264.0
131.9
841253.9
6.0
137.67
0.00
0.00
0.00
22.58
73.49
41.60
268.0
130.9
839865.8
6.0
135.04
0.00
0.00
0.00
22.55
71.83
40.66
272.0
130.3
838865.9
6.0
133.15
0.00
0.00
0.00
22.53
70.63
39.98
276.0
129.7
838182.3
6.0
131.86
0.00
0.00
0.00
22.52
69.82
39.52
280.0
129.1
837666.2
6.0
130.90
0.00
0.00
0.00
22.51
69.21
39.18
284.0
128.5
837237.5
&0
130.10
0.00
0.00
0.00
22.50
68.70
38.89
288.0
127.9
836852.9
6.0
129.38
0.00
0.00
0.00
22.49
68.25
38.63
292.0
127.2
836488.8
6.0
128.70
0.00
0.00
0.00
22.49
67.82
38.39
296.0
126.6
836132.5
6.0
128.04
0.00
0.00
0.00
22.48
67.41
38.15
300.0
124.6
835777.1
6.0
127.38
0.00
0.00
0.00
22.47
66.99
37.92
304.0
121.4
835119.4
&0
126.16
0.00
0.00
0.00
22.46
66.22
37.48
308.0
118.3
833985.3
6.0
124.08
0.00
0.00
0.00
22.44
64.90
36.74
312.0
115.3
832001.5
6.0
121.55
0.00
0.00
0.00
22,41
63.31
35.83
316.0
112.3
831091.8
6.0
118.82
0.00
0.00
0.00
22.38
61.58
34.86
320.0
109.4
829523.5
6,0
116.01
0.00
0.00
0.00
22.35
59.80
33.85
324.0
108.6
827933.7
6.0
113.18
0.00
0.00
0.00
22.32
58.02
32.84
328.0
103.8
826342.7
6.0
110.38
0.00
0.00
0.00
22.29
56.25
31.84
332.0
101.1
824761.7
6.0
107.62
0.00
0.00
0.00
22.26
54.51
30.86
336.0
98.5
823196.9
&0
104.93
0.00
0.00
0.00
22.22
52.81
29.39
340.0
95.9
821652.0
6.0
102.29
0.00
0.00
0.00
22.10
51.14
28.95
344.0
93.5
820128.8
6.0
99.71
0.00
0.00
0.00
22.16
49.52
28.03
348.0
91.0
818628.3
6.0
97.20
0.00
0.00
0,00
22.13
47.94
27.13
352.0
88.7
817151.2
6.0
94.7B
0.00
0.00
0,00
22,10
46.39
26,26
356.0
86.4
815697.5
6.0
92.38
0.00
0.00
0.00
22.07
44.89
25,41
360.0
84.2
814267.4
6.0
90.06
0.00
0.00
0.00
22.05
43.43
24,58
364.0
82.0
812860.8
6.0
87.80
0.00
0.00
0.00
22.02
42.01
23.78
368.0
79.9
811477.4
5.9
85.61
0.00
0.00
0.00
21.99
40.62
22.99
372.0
77.9
810117.1
5.9
83.47
0.00
0.00
0,00
21.96
39.28
22.23
376.0
75.9
808779.7
5.9
81.40
0.00
0.00
0.00
21.94
37.97
21.49
380.0
74.0
807464.8
5.9
79.38
0.00
0.00
0.00
21.91
36.70
20.77
384.0
72.1
806172.1
5.9
77.41
0.00
0.00
0.00
21.88
35.46
20.07
388.0
70.3
804901.4
5.9
75.50
0.00
0.00
0.00
21.86
34.26
19.39
392.0
68.5
803652.2
5.9
73.65
0.00
0.00
0.00
21.83
33.09
18.73
396.0
6fi.8
802424.2
5.9
71.84
0.00
0.00
0.00
21.81
31.95
18.09
400.0
65.1
801217.0
5.9
70.09
0.00
0.00
0.00
21.78
30.85
17,46
404.0
63.5
800030.3
5.9
68.38
0.00
0.00
0.00
21.76
29.77
16,85
408.0
61.9
798863.fi
5.9
66.73
0.00
0.00
0.00
21.73
28.73
16.26
POND100%.XLS

HS @ 100 Year, 100% Imp.
�e
Time
min
Inflow
(cfs)
Starage
R"3)
Stage
ff
Outflow
(cfs)
Opening (W)
cfs)
Opening (0)
(cfs)
Barrel
(cfs
Orl0ce
(cfs
Weir 1
(cfs)
Weir 2
(cfs)
412.0
60.4
797716.7
5.9
65.12
0.00
0.00
0.00
21.71
27.72
15.69
416.0
58.9
796589.1
5.9
63.55
0.00
0.00
0.00
21.69
26.73
15.13
420.0
57.5
795480.3
5.9
62.03
0.00
0.00
0.00
21.66
25.78
14.59
424.0
56.1
794390.1
5.9
60.55
0.00
0.00
0.00
21.64
24.85
14.06
428.0
54.7
793318.0
5.9
59.12
0.00
0.00
0.00
21.62
23.94
13.55
432.0
53.4
792263.6
5.9
57.72
0.00
0.00
0.00
21.60
23.07
13.06
436.0
52.1
791226.5
5.9
56.36
0.00
0.00
0.00
21.58
22.21
12.57
440.0
50.9
790206.3
5.9
55.05
0.00
0.00
0.00
21.56
21.39
12.10
444.0
49.6
789202.6
5.9
53.76
0.00
0.00
0,00
21.54
20.58
11.65
446.0
48.5
788215.0
5.9
52.52
0.00
0.00
0.00
21.51
19.80
11.21
452.0
47.3
787243.1
5.9
51.31
0.00
0.00
0.00
2149
19.04
10.78
456.0
46.2
786286.5
5.9
50.13
0.00
0.00
0.00
2147
18.30
10.36
460.0
45.1
765344.8
5.9
48.99
0.00
0.00
0.00
21.46
17.58
9.95
464.0
44.1
784417.6
5.9
47.88
0.00
0.00
0.00
21.44
16.89
9.56
468.0
43.1
783504.6
5.9
46.80
0.00
0.00
0.00
21.42
16.21
9.18
472.0
42.1
782605.3
5.9
45.75
0.00
0.00
0.00
21.40
15,55
8.80
476.0
41.1
781719.3
5.9
44.73
0.00
0.00
0.00
21.38
14.91
8.44
480.0
40.2
780846.3
5.9
43.74
0.00
0.00
0.00
21.36
14.29
8.09
484.0
39.2
779985.9
5.9
42.78
0.00
0.00
0.00
21.34
13.69
7.75
488.0
38.4
779137.7
5.9
41.84
0.00
0.00
0.00
21.33
13.10
7.42
492.0
37.5
778301.2
5.9
40.93
0.00
0.00
0.00
21.31
12.53
7.09
496.0
36.7
777476.3
5.9
40.05
0.00
0.00
0.00
21.29
11.98
6.78
500.0
35.8
776662.3
5.9
39.19
0.00
0.00
0.00
21.27
11.44
6.47
504.0
35.0
775859.1
5.9
38.35
0.00
0.00
0.00
21.26
10.91
6.18
508.0
34.3
775066.2
5.9
37.54
0.00
0.00
0.00
21,24
10.40
5.89
512.0
33.5
774283.1
5.9
36,74
0.00
0.00
0.00
21.22
9.91
5.61
516.0
32.8
773509.6
5.9
35.96
0.00
0.00
0.00
21.21
9.43
5.34
520.0
32.1
772745.3
5.9
35.23
0.00
0.00
0.00
2119
8.96
5.07
524.0
31.4
771989.8
5.9
34.50
0.00
0.00
0.00
21 A
8.51
4.82
528.0
30.7
771242.8
5.9
33.79
0.00
0.00
0.00
21.18
8.07
4.57
532.0
30.1
770503.5
5.8
33.11
a.aa
0.00
0.00
21.14
7.64
4.32
POND100%.XLS

jjIIUU4�j� dEh tl d 1995
M5,8 gs(2v..
J!"dil
December 7, 1995
Ms. Linda Lewis
Environmental Engineer
North Carolina DEHNR
Division of Environmental Management
127 Cardinal Drive Extension
Wilmington, NC 28405-3845
Re: Horseshoe Lake
Landfall
Dear Ms. Lewis:
Enclosed please find the Stormwater Management Permit
Application for the referenced project. The package
includes the following:
- Executed permit application
- $385 application fee
- Calculations
- Two sets of plans
Please direct any questions regarding the package to Mr.
Richard Dickie at John McAdams office, telephone number
919-361-5000.
Sincerely,
]Yeith Cooper
Director of Land Development
SKC:sc
enclosures
CC: Richard Dickie
Larry Zucchino
Wayne Polston
LANDFALL ASSOCIATES • P.O. BOX 5368, HANOVER CENTER STATION • WILMINGTON, NORTH CAROLINA 28403 • 919-256-6111

PREPARED BY AND RETURN TO: Pamela D. Duncan, Schell Bray Aycock
Abel & Livingston L.L.P., P. 0. Box 21847, Greensboro, N.C. 27420
o BOOK
CE
PypQ�`a.
STATE OF NORTH CAROI;11 �3 2 L(�CI$'T� NDMENT TO CERTIFICATE OF
ASSUMED NAME OF LANDFALL ASSOCIATES
COUNTY OF NEW HANOVER
This amendment, made as of the 2i3day of T)Du2r)'� , 1994,
between FHK LANDFALL ASSOCIATES LIMITED PARTNERSHIP, a North
Carolina limited partnership with its primary place of business in
Chapel Hill, Orange County, North Carolina, and MIDWAY PROPERTIES,
INC., a North Carolina corporation with its principal place of
business in Greensboro, Guilford County, North Carolina, herein
referred to collectively as Partners in LANDFALL ASSOCIATES, a
North Carolina joint venture in the form of a general partnership.
A. Goforth Development Company and Westminster Company were
parties to a Certificate of Assumed Name of Landfall Associates
recorded in Book 1294 at Page 736 of the New Hanover County
Registry (the "Certificate"), and to an Amendment to Certificate
of Assumed Name of Landfall Associates recorded in Book 1456,
Page 758 of said Registry (the "First Amendment").
B. Goforth Development Company conveyed its entire interest
in Landfall Associates ::c F:i Landfall Associates Limited
Partnership. Accordingly, Goforth Development Company withdrew
as a partner in Landfall Associates, and FHK Landfall Associates
Limited Partnership joined Westminster Company as a partner in
Landfall Associates, as set out in a second amendment to the
Certificate recorded in Book 1481, Page 0280 of the New Hanover
County Registry (the "Second Amendment").
C. The Certificate was amended by amendments recorded in
Book 1525, Page 0273 (the "Third Amendment"), in Book 1567, Page
0015 (the "Fourth Amendment"), in Book 1628, Page 0653 (the
"Fifth Amendment"), and in Book 1672, Page 1407 (the "Sixth
Amendment"), all in the New Hanover County Registry. By an
amendment recorded in Book 1686, Page 0307 of the New Hanover
County Registry (the "Seventh Amendment"), Westminster Company
transferred all its rights and obligations in Landfall Associates
to Westminster Homes, Inc. By an amendment recorded in Book
1783, Page 0091 of the New Hanover County Registry (the "Eighth
Amendment"), the Certificate was amended to reflect the change in
corporate name of Westminster Homes, Inc. to Midway Properties,
Inc.
D. The partners hereby amend Paragraph 3 of the Certificate,
as set out in the Sixth Amendment, by deleting Paragraph 3 in its
entirety and substituting the following language in lieu thereof:
The following documents shall be the valid act of the Joint
Venture (Partnership) if duly executed on behalf of the Joint
Venture (Partnership) by either Frank H. Kenan, John C.
Yelverton or Shirley A. Mayfield and either S. Keith Cooper
or Bruce Koch:
REfURNEDTO �G�d6a( a5scuia�
asp-c��n �-

BOOK PAGE
1832 0828
a) Offers, Purchase Agreements, Options to Sell and Letters
of Intent for the sale of any real property owned by the
Joint Venture (Partnership);
b) Deeds for the conveyance of any interest in real
property owned by the Joint Venture (Partnership);
c) Plats of real property owned by the Joint Venture
(Partnership);
d) Restrictive Covenants and Declarations of Covenants and
amendments and releases related thereto imposed on real
property owned by the Joint Venture (Partnership);
e) Release Agreements releasing land encumbered by deeds of
trust in which the Joint Venture (Partnership) is the
beneficiary;
f) Bills of Sale for the conveyance of any personal
property owned by the Joint Venture (Partnership); and
g) Title Insurance Affidavits relating to real property
owned by the Joint Venture (Partnership).
E. Except as specifically amended herein, the Certificate,
as previously amended, is hereby ratified and confirmed.
IN WITNESS WHEREOF, the parties have executed this Amendment
as of the date and year above written.
LANDFALL ASSOCIATES, a North Car;lina
Joint Venture (SEAL)
BY: FHK LANDFALL ASSOCIATES LIMITED
PARTNERSHIP, a Joint Venturer (SEAL)
B (SEAL)
Fr9nk H. Kenan, General Partner
BY: MIDWAY PROPERTIES, INC.,
a Joint Venturer
By: IIU Y " ' aw (SEAL)
$i U1t,., President
- 2 -
I

NORTH CAROLINA
COUNTY
:iECvrcD a %, , VERIFIED
h S: -T OC ( S
REG S ER OF DEEDS
NEW HANOVER CO. NC
I, a Notary Public of the Cour9Y3ND�1§9S " EJ2 58
aforesaid, certify that Frank H. Kenan personally appeared before
me this day and acknowledged that he is the general partner of
FHK LANDFALL ASSOCIATES LIMITED PARTNERSHIP, a North Carolina
limited partnership which is a general partner in LANDFALL
ASSOCIATES, a North Carolina joint venture in the form of a
general partnership, and that by authority duly given and as the
act of the limited partnership, the foregoing instrument was
signed in its name by said general partner.
BOOK PAGE
i832 0829
Witness my hand and official stamp or seal, this ���L day of
%%aei0�0 . , 1994.
Oie(::-�?
i Notary Public
expires: ^i�'-1,
/Seal)
INA
COUNTY
I, a Notary Public of the County and State
aforesaid, cer ify that X fAr t0.Mpersonally appearrebefore
me this day and acknowledged that e is the UA.dld.�
Secretary of MIDWAY PROPERTIES, INC., a North Carolina
corporation which is a general partner in LANDFALL ASSOCIATES, a
North Carolina joint venture in the form of a general partnership,
and that by authority duly given and as the act of the
V
corporation, the foregoing instrument was signed in its name by
its ERR President, seale with its corporate seal and
attested by as its Secretary.
t
Witness my hand and official stamp or seal, this ';—W day of
1994.
L�e+eeeeen�
My,,commi;s,§16A expires:
'(S mp/ ea(J)
9*7 Notlry
J'ut cld
STATE OF NORTH CAROLINA
New Hanover County
rego' g/An ed Sgcate(54 of
3 - tti
Notary(Nota )Pubbcis/arecerofied
to be maeecctt•.
This Ihe.`' '7 dayof 19�
Mar Sue Cjo .Register of deeds

N,.fs1�•t L mYe
iffndfn�
DATE: October 20, 199S
MEMO TO: George House (via UPS)
Randy Tinsley (via UPS)
Larry Zucchino (via UPS)
Braxten Schell
FROM: S. Keith Cooper 1CJ �iJGliGIL
RE: Horseshoe Lake
OCT ?9 1995
a
John Yelverton
Sam Cooper
Bob Thomson
Bob Taylor
Enclosed please find a copy of the fully executed 404 permit
for Horseshoe Lake. In addition to the attached
information, the permit included the following drawings from
the February application:
1. Plat 1 Existing Conditions
2. Plat 4 Project Impact
3. Plat 6 Upper Lake Area Mitigation Plan
4. Plat 7 Rendered Mitigation detail
If anyone needs copies of the drawings, please advise. We
did not reproduce them due to the expense.
SKC:sc
enclosure
LANDFALL ASSOCIATES • P.O. BOX 5368, HANOVER CENTER STATION • WILMINGTON, NORTH CAROLINA 211403 • 919-2566111

I V
DEPARTMENT OF THE ARMY
WILMINGTON DISTRICT, CORPS OF ENGINEERS
P.O. BOX 1890 50'
WILMINGTON, NORTH CAROLINA 28402-1890
REPLY TO
ATTENTCN OF
October 18, 1995
Regulatory Branch
Action ID No. 199500221
Landfall Associates
ATTN: Mr. Keith Cooper
Post Office Box 5368
Hanover center Station
Wilmington, North Carolina 28403
Dear Sir:
In accordance with the written request of February 1, 1995, and the
ensuing administrative record, enclosed is a permit to excavate 1.16 acres of
cattail marsh and 3.00 acres of open water in the existing Horseshoe Lake,
inundate and fill 1.28 acres of man-made wetlands and 2.29 acres of natural
wetlands for the creation of the Upper Lake, and fill 0.05 acre of natural
wetlands for the construction of a road. The total amount of impacted
wetlands will be 7.78 acres. The proposed work is located adjacent to the
Atlantic Intracoastal Waterway, off Arboretum Drive in the Horseshoe Lake area
of Landfall, in Wilmington, New Hanover County, North Carolina.
If any change in the authorized work is required because of unforeseen
or altered conditions or for any other reason, the plans revised to show the
change must be sent promptly to this office. Such action is necessary, as
revised plans must be reviewed and the permit modified.
Carefully read your permit. The general and special conditions are
important. Your failure to comply with these conditions couldresult in a
violation of Federal law. Certain significant general conditions require
that:
a. You must complete construction before December 31, 2000.
b. You must notify this office in advance as to when you intend to
commence and complete work.
C. You must allow representatives from this office to make periodic
visits to your worksite as deemed necessary to assure compliance with permit
plans and conditions.
The enclosed Notice of Authorization, ENG Form 4336, must be
conspicuously displayed at your worksite.
Sincerely,
""James H. Bradley
Chief, Construction -Operations
Enclosures
Pnnted on ® Re dW Paper

Copy Furnished with enclosures
Director, Atlantic Marine Center
National Ocean Service
ATTN: MOA 232X1
439 West York Street
Norfolk, Virginia 23510
Copies Furnished with special conditions and plans:
Ms. L. K. (Mike) Gantt
U.S. Fish and Wildlife Service
Fish and Wildlife Enhancement
Post Office Box 33726
Raleigh, North Carolina 27636-3726
Mr. Larry Hardy
National Marine Fisheries Service
Pivers Island
Beaufort, North Carolina 28516
Mr. Thomas Welborn, Chief
Wetlands Regulatory Section - Region IV
Wetlands, Oceans and Watersheds Branch
U.S. Environmental Protection Agency
345 Courtland Street, N.E.
Atlanta, Georgia 30365
Mr. John Parker
Division of Coastal Management
North Carolina Department of
Environment, Health and
Natural Resources
Post Office Box 27687
Raleigh, North Carolina 27611-7687
2

DEPARTMENT OF THE ARMY PERMIT
LANDFALL ASSOCIATES
Permittee
199500221
Permit No.
CESAW-CO-R
Issuing Office
NOTE: The term "you" and its derivatives, as used in this permit, means the permittee or any future transferee. The term
"this office" refers to the appropriate district or division office of the Corps of Engineers having jurisdiction over the permitted
activity or the appropriate official of that office acting under the authority of the commanding officer.
You are authorized to perform work in accordance with the terms and conditions specified below,
Project Description:
To excavate 1.16 acres of cattail marsh and 3.00 acres of open water in the existing Horseshoe Lake,
inundate and fill 1.28 acres of man-made wetlands and 2.29 acres of natural wetlands for the creation
of the Upper Lake, and fill 0.05 acre of natural wetlands for the construction of a road.
Project Location:
Adjacent to the Atlantic Intracoastal Waterway, off Arboretum Drive in the Horseshoe Lake area of
Landfall, in Wilmington, New Hanover County, North Carolina.
Permit Conditions:
General Conditions:
1. The time limit for completing the work authorized ends on December 31 1998 . If you find that you need
more time to complete the authorized activity, submit your request for a time extension to this office for consideration at least
one month before the above date is reached.
_ 2. You must maintain the activity authorized by this permit in good condition and in conformance with the terms and condi.
tions of this permit. You are not relieved of this requirement if you abandon the permitted activity, although you may make
a good faith transfer to a third party in compliance with General Condition 4 below. Should you wish to cease to maintain
the authorized activity or should you desire to abandon it without a good faith transfer, you moat obtain a modification of
this permit from this office, which may require restoration of the area.
3. If you discover any previously unknown historic or archeological remains while accomplishing the activity authorized by
this permit, you must immediately notify this office of what you have found. We will initiate the Federal and state coordina-
tion required to determine if the remains warrant a recovery effort or if the site is eligible for listing in the National Register
of Historic Places.
ENG FORM 1721, Nov 86 EDITION OF SEP 82 IS OBSOLETE.
(33 CFR 325 (Appendix A))
1

4. If you sell the property associated with this permit, you must obtain the signature of the new owner in the space provided
and forward a copy of the permit to this office to validate the transfer of this authorization.
5. If a conditioned water quality certification has been issued for your project, you must comply with the conditions specified
in the certification as special conditions to this permit. For your convenience, a copy of the certification is attached if it con-
tains such conditions.
6. You must allow representatives from this office to inspect the authorized activity at any time deemed necessary to ensure
that it is being or has been accomplished in accordance with the terms and conditions of your permit.
Special Conditions:
See enclosed sheet.
Further Information:
1. Congressional Authorities: You have been authorized to undertake the activity described above pursuant to:
( ) Section 10 of the Rivers and Harbors Act of 1899 (33 U.S.C. 403).
( }j Section 404 of the Clean Water Act (33 U.S.C. 1344).
( ) Section 103 of the Marine Protection, Research and Sanctuaries Act of 1972 (33 U.S.C. 1413).
2. Limits of this authorization.
a. This permit does not obviate the need to obtain other Federal, state, or local authorizations required by law.
b. This permit does not grant any property rights or exclusive privileges.
c. This permit does not authorize any injury to the property or rights of others.
d. This permit does not authorize interference with any existing or proposed Federal project.
3. Limits of Federal Liability. In issuing this permit, the Federal Government does not assume any liability for the following:
a. Damages to the permitted project or uses thereof as a result of other permitted or unpermitted activities or from natural
causes.
b. Damages to the permitted project or uses thereof as a result of current or future activities undertaken by or on behalf
of the United States in the public interest.
c. Damages to persons, property, or to other permitted or unpermitted activities or structures caused by the activity
authorized by this permit.
d. Design or construction deficiencies associated with the permitted work.
2

e. Damage claims associated with any future modification, suspension, or revocation of this permit.
4. Reliance on Applicant's Data: The determination of this office that issuance of this permit is not contrary to the public
interest was made in reliance on the information you provided.
5. Reevaluation of Permit Decision. This office may reevaluate its decision on this permit at any time the circumstances
warrant. Circumstances that could require a reevaluation include, but are not limited to, the following:
a. You fail to comply with the terms and conditions of this permit.
b. The information provided by you in support of your permit application proves to have been false, incomplete, or
inaccurate (See 4 above).
c. Significant new information surfaces which this office did not consider in reaching the original public interest decision.
Such a reevaluation may result in a determination that it is appropriate to use the suspension, modification, and revocation
procedures contained in 33 CFR 325.7 or enforcement procedures such as those contained in 33 CFR 326.4 and 326.5. The
referenced enforcement procedures provide for the issuance of an administrative order requiring you to comply with the terms
and conditions of your permit and for the initiation of legal action where appropriate. You will be required to pay for any
corrective measures ordered by this office, and if you fail to comply with such directive, this office may in certain situations
(such as those specified in 33 CFR 209.170) accomplish the corrective measures by contract or otherwise and bill you for the
coat.
6. Extensions. General condition 1 establishes a time limit for the completion of the activity authorized by this permit. Unless
there are circumstances requiring either a prompt completion of the authorized activity or a reevaluation of the public interest
decision, the Corps will normally give favorable consideration to a request for an extension of this time limit.
Your signature below, as permittee, indicates that you accept and agree to comply with the terms and conditions of this permit.
(PER T- S. Keith Coo , Authorized Agent
/ L FALL ASSOCIATES
October 11, 1995
(DATE)
This permit becomes effective when the Federal official, designated to act for the Secretary of the Army, has signed below.
(DI T—BICT ENGINEER) (DATE)
ROBERT J. SPERBERG, COLONEL, EN
v
- When the structures or work authorized by this permit are still in existence at the time the property is transferred, the terms and
conditions of this permit will continue to be binding on the new owner(s) of the property. To validate the transfer of this permit
and the associated liabilities associated with compliance with its terms and conditions, have the transferee sign and date below.
(TRANSFEREE)
(DATE)
51
-U.S. GOVERNMENT PRINTING OFFICE: 19M - 71742

l
SPECIAL CONDITIONS
1. All work will be performed in accordance with the enclosed plans.
Should the project involve a change of plans for work in wetlands other than
that detailed in the enclosed plans, a modification to the plans will be
submitted to the U. S. Army Corps of Engineers (USACE) and the review
agencies for approval and possible authorization.
2. The work will be conducted in such a manner as to prevent significant
increases in turbidity outside the area of construction or construction
related discharge (50 NTUs in streams and 25 NTUs in all saltwater classes and
all lakes and reservoirs will not be considered significant).
3. The North Carolina Division of Environmental Management (NCDEM) shall
be copied with all as -built and mitigation plans.
4. Mitigation to offset impacts of the work will be implemented in
accordance with the attached mitigation plan, with the exceptions listed below
in Conditions 6, 7, 8, 9, and 10. The mitigation will result in the creation
of 3.24 acres of wetlands from existing uplands, the restoration of 0.56 acre
of prior converted wetlands, the enhancement of 4.64 acres of existing
wetlands, the creation of 4.73 acres of open -water habitat from existing
wetlands and uplands, and the preservation of 12.32 acres of existing wetlands
and open -water habitat.
5. Within the wetland mitigation areas, the physical and chemical
properties of the soils will be suitable to support target plant species.
Hydrology will be maintained such that the soils are either saturated within
12 inches of the surface, or ponded or flooded, for at least 12.5 percent of
the growing season under reasonably average climatic conditions. The
geomorphology of the area will be suitable to meet hydrology requirements with
regards to contours, elevation, and drainage/connections with surface waters.
6. .Wetland vegetative species to be planted are listed on Plat 3 of the
enclosed plans. The numbers of each species to be planted and the planting
plan are also listed. Changes in planted species and locations of planted
vegetation may be altered in accordance with agreements with adjacent property
owners and as dictated by onsite field conditions. However, finalization of
the types, numbers, and locations of each species will be shown on a map and
forwarded to the USACE and NCDEM for approval prior to the initiation of
planting.
7. Survival rates of each species will be at least 80 percent of the
number planted. Survival rate monitoring will be conducted for three years
from the initial planting, and will occur at the beginning and the end of each
growing season. If a survival rate of less than 80 percent occurs, the
species will be replanted in accordance with the original planting plan, and a
new three year monitoring period will begin.
8. Should any of the proposed parameters fail, the permittee will meet
with the USACE and NCDEM to approve a revised plan, and the applicant shall
take any remedial action specified by the USACE to meet the requirements of
the mitigation plan, as amended by conditions 6, 7, and 8.
9. At the end of a successful three year monitoring period, coordination
will be conducted with the USACE and NCDEM to ensure that the mitigation area
remains a functional wetland in perpetuity, of similar or higher quality than
the initial design.

14.
10. The permittee shall maintain the 12.32 acres of wetlands and open water
areas shown on "Plat 4 Horseshoe Lake Complex Mitigation Detail,, as
"preservation" in its current condition as modified by work authorized by this
permit and mitigation plan. Within 30 days of final issuance of this permit,
permittee shall grant a conservation easement acceptable to the Corps of
Engineers, covering the 12.32 preservation acres, to the Northeast New Hanover
Conservancy, or to another conservation group or governmental agency approved
by the Corps.
11. Any excavated material will be properly disposed of in either a
suitable high ground location or as specifically authorized by a Department of
the Army permit.
12. All conditions of the NCDEM water quality certification, and all
conditions of the NCDCM consistency determination are conditions of this
permit.

State of North Carolina
Department of Environment, Health, and Natural Resources
Wilmington Regional Office
James B. Hunt, Jr. DIVISION OF ENVIRONMENTAL MANAGEMENT Jonathan B. Howes
Governor WATER QUALITY SECTION Secretary
September 27, 1995
Mr. Keith Cooper ____J.
Landfall Associates
2011 Pembroke Jones Drive
Wilmington, North Carolina . 28405
Subject: REQUEST FOR STORMWATER MANAGEMENT
PERMIT APPLICATION
Horseshoe Lake Subdivision
New Hanover County
Dear Mr. Cooper:
On September 27, 1995, the Wilmington Regional Office received a Sedimentation and Erosion Control Plan
for Horseshoe Lake Subdivision. As of this date, however, we have not received a Stormwater Management Permit
Application, fee and a proposal regarding stormwater management for the subject project.
Please be aware that any site which requireSeither a Sedimentation and Erosion Control Plan permit and/or
a CAMA major permit will also require a stormwater management permit by the Division of Environmental
Management. Any construction on the subject site, prior to receipt of the required permit, will constitute a violation
of 15A NCAC 2H.1000 and will result in appropriate enforcement action by this Office.
A Stormwater Permit Application Package or information regarding the status of this project and the expected
submittal date must be received by this Office no later than October 27, 1995, or the subject project file will be
closed and construction may experience a subsequent delay. If you have any questions, please call me at (910)-395-
3900.
Sincerely,
iez� Cie?
Linda Lewis
Environmental Engineer
DA/arl: S:\WQS\STORMWAT\STORMSUB\HORSLAKE.SEP
cc: Alan Golden, New Hanover County Inspections
Richard Dickie, P.E.
Linda -Lewis- i
Central Files
127 Cardinal Drive Extension, Wilmington, N.C. 28405-3845 • Telephone [phone] • Fax [phone]
An Equal Opportunity Affirmative Action Employer

MINUTES OF ACTION OF BOARD OF DIRECTORS
OF
LANDFALL SUBDIVISION II OWNERS ASSOCIATION, INC.
IN LIEU OF AN ORGANIZATION MEETING
The following action was taken by the Board of Directors of
Landfall Subdivision II Owners Association, Inc. in lieu of an
organization meeting by this written consent thereto signed by
all of the directors of the corporation:
(1) RESOLVED, that the bylaws in the form made
available for examination by each director of the corporation
be and hereby are adopted as the bylaws of the corporation
and shall be inserted in the minute book of the corporation
immediately following the Articles of Incorporation and
preceding these minutes.
(2) RESOLVED, that the following seal be and hereby is
approved -and adopted as the seal of the corporation:
1i
(3) RESOLVED, that the following persons be and hereby
are elected to serve as officers of the corporation until the
next annual meeting of the Board of Directors and until their
respective successors are chosen and qualified:
President
Vice President
Secretary and Treasurer
Assistant Secretary
S. Keith.Cooper
W. Scott Gilbert
Shirley A. Mayfield
W. Scott Gilbert
(4) RESOLVED, that NationsBank, N.A., Wilmington, North
Carolina, be and hereby is designated as a depository of this
corporation and that a checking account be opened and
maintained in the name of the corporation with said bank.
J

`u
.. y
FURTHER RESOLVED, that the banking resolutions set forth
in the form made available for examination by each director,
a copy of which is attached to and made a part of these
minutes as Exhibit A, be and hereby are approved and adopted,
and that the Secretary of this corporation be and hereby is
authorized to certify to the passage of said resolutions
under the seal of the corporation.
(5) RESOLVED, that the officers of this corporation be
and hereby are authorized and directed, in the name and on
the behalf of the corporation, to make or cause to be made,
and to execute and deliver, all such additional agreements,
documents and instruments, and to do or cause to be done all
such acts and things, and to take all such steps, as they may
deem necessary and advisable to carry out fully the purposes
of the foregoing resolutions.
This action is effective as of the J4L,day of
1995.
S If ith Cooper
W. Scott Gilbert
4rleyMayfield
- 2 -

STATE OF
NORTH
CAROLINA
Department of The
Secretary of State
To all whom these presents shall come, Greetings:
I, Rufus L. Edmisten, Secretary of State of the State of
North Carolina, do hereby certify the following and hereto
attached to be a true copy of
ARTICLES OF INCORPORATION
OF
LANDFALL SUBDIVISION II OWNERS ASSOCIATION, INC.
the original of which was filed in this office on the 11th day of
April, 1995.
IN WITNESS WHEREOF, I have hereunto set my
hand and axed my official seal at the City of
Raleigh, this 11th day of April, 1995.
Secretary of State

.c{
ARTICLES OF INCORPORATION
05 102 [1)043 OF
v--.,? 6- Z3o_
FILED
9:00 AM
APR 1 11995
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LANDFALL SUBDIVISION II OWNERS ASS0CIATIOIV,FE US L EDMISTEN
SECRETARY OF STATE
NORTH CAROLINA
In compliance with the requirements of Chapter 55-A of the
North Carolina General Statutes, the undersigned, a natural person
of full age, has this day executed these Articles of Incorporation
for the purpose of forming a non-profit corporation and hereby
certifies:
ARTICLE I
The name of the corporation is Landfall Subdivision II Owners
Association, Inc., hereinafter called the "Association."
ARTICLE II
The principal and registered office of the Association is
located at 2011 Pembroke Jones Drive, Wilmington, New Hanover
County, North Carolina 28405.
ARTICLE III
W. Scott Gilbert, whose address is 2011 Pembroke Jones Drive,
New Hanover County, Wilmington, North Carolina 28405 is hereby
appointed the initial registered agent of this Association.
ARTICLE IV
PURPOSE AND POWERS OF THE ASSOCIATION
The Association does not contemplate pecuniary gain or profit
to the members thereof and no part of the Association's net income
shall inure to the benefit of any of its officers, directors or
members or any other private individual. The purposes and objects
of the Association shall be to provide for administration,
maintenance and preservation of the Common Area within that
certain property described as follows:
Lying and being in New Hanover County, North Carolina,
and being more particularly described on Exhibit A
attached hereto and incorporated herein by reference;
and to promote the health, safety and welfare of the residents
within the above described property and any additions thereto as
may hereafter be brought within the jurisdiction of —this
Association, and for this purpose to:
PDD2179

(a) exercise all of the powers and privileges and to
perform all of the duties and obligations of the Association
as set forth in that certain Declaration of Covenants,
Conditions and Restrictions, hereinafter called the
"Declaration," applicable to the property and recorded or to
be recorded in the Office of the Register of Deeds of New
Hanover County, North Carolina, and as the same may be amended
from time to time as therein provided, said Declaration being
incorporated herein as if set forth at length;
(b) fix, levy, collect and enforce payment of, by any
lawful means, charges or assessments pursuant to the terms of
the Declaration; to pay all expenses in connection therewith
and all office and other expenses incident to the conduct of
the business of the Association, including all licenses, taxes
or governmental charges levied or imposed against property
which the Association is required to maintain;
(c) acquire (by gift, purchase, lease or otherwise),
own, hold, improve, build upon, operate, maintain, convey,
sell, lease, transfer, dedicate for public use or otherwise
dispose of real or personal property in connection with the
affairs of the Association;
(d) borrow money and with the assent of two-thirds (2/3)
of each class of Members, mortgage, pledge, deed in trust, or
hypothecate any or all of the real or personal property which
the Association is required to maintain as security for money
borrowed or debts incurred;
(e) dedicate, sell or transfer all or any part of the
Common Area (other than Shared Common Area as defined in the
Declaration) to any public agency, authority, or utility
(including any entity authorized by an appropriate
governmental body to supply cable television service) for such
purposes and subrject to such conditions as may be agreed to by
the Board of Directors. No such dedication or'transfer shall
be effective unless an instrument has been signed by a
majority of the Board of Directors agreeing to such
dedication, sale or transfer;
(f) participate in mergers and consolidations with other
non-profit corporations organized for the same purposes,
provided that any such merger or consolidation shall have the
assent of two-thirds (2/3) of each class of Members;
(g) annex additional residential property and Common
Area pursuant to the provisions of Article XI, Section 1 of
the Declaration; and
(h) have and to exercise any and all powers, rights and
privileges which a corporation organized under the Non -Profit
Corporation Law.of the State of North Carolina by law may now
or hereafter have or exercise.
- 2 -

ARTICLE V
MEMBERSHIP
- Every person or entity who or which is a record owner of a fee
or undivided fee interest in any Lot within the Property shall be
a voting Member of the Association. The foregoing is not intended
to include persons or entities who hold an interest merely as
security for the performance of an obligation. Such membership
shall be appurtenant to and may not be separated from ownership of
any Lot.
ARTICLE VI
VOTING RIGHTS
The Association shall have two (2) classes of voting
membership:
Class A. Class A Members shall be all Owners other than
Landfall Associates ("Declarant"). Class A Members shall be
entitled to one (1) vote for each Lot owned. When more than one
person holds an interest in any Lot, all such persons shall be
Members. The vote or votes for such Lot shall be exercised as
they among themselves determine, but in no event shall more than
one (1) vote be cast with respect to any Lot.
Class B. The Class B Member shall be the Declarant, who shall
^� be entitled to three (3) votes for each Lot owned by it. The
Class B membership shall cease and be converted to Class A
membership on December 31, 2005, or such earlier date as Declarant
may elect, in writing, to convert its Class B membership to Class A
membership.
Notwithstanding anything to the contrary herein, until
December 31, 2005, Declarant shall have the right to designate and
select a majority of the Board of Directors of the Association.
Whenever Declarant shall be entitled to designate and select any
person to serve on any Board of Directors of the Association, the
manner in which such person shall be designated shall be as
provided in these Articles of Incorporation and/or Bylaws of the
Association. Declarant shall have the right to remove any person
selected by it to act and serve on said Board of Directors and to
replace such person with another person to act and serve in the
place of any director so removed for the remainder of the
unexpired term of the removed director. Any director designated
and selected by Declarant need not be the Owner of a Lot. Any
representative of Declarant serving on the Board of Directors of
the Association shall not be required to disqualify himself from
any vote upon any contract or matter -between Declarant and the
Association where Declarant may have a pecuniary or other
interest. Similarly, Declarant, as a Member of the Association,
shall not be required to disqualify itself upon any contract or
matter between Declarant and the Association where Declarant may
have a pecuniary or other interest.
- 3 -

.J
ARTICLE VII
BOARD OF DIRECTORS
The first Board of Directors of_the Association shall consist
of three (3) persons. Beginning with the second Annual Meeting of
the members of the Association, and at subsequent meetings unless
changed by an amendment to the Bylaws, the Board of Directors
shall consist of five (5) persons. Directors need not be members
of the Association. The names and addresses of the persons who
are to act in the capacity of directors until the selection of
their successors are:
Name
S. Keith Cooper
W. Scott Gilbert
Shirley A. Mayfield
Address
2011 Pembroke Jones Drive
Wilmington, N.C. 28405
2011 Pembroke Jones Drive
Wilmington, N.C. 28405
2011 Pembroke Jones Drive
Wilmington, N.C. 28405
Subject to the right of Declarant to select and designate the
Board of Directors, at the second Annual Meeting (in April, 1996)
the Members shall select three (3) directors for a term of two (2)
years and two (2) directors for a term of one (1) year; and at
each annual meeting thereafter the Members shall elect directors
for a term of two (2) years.
ARTICLE VIII
DISSOLUTION
The Association may be dissolved with the assent given in
writing and signed by not less than two-thirds (2/3) of each class
of voting Members. Upon dissolution of the Association, other
than incident to a merger or consolidation, the assets of the
Association shall be transferred to one or more organizations
devoted to purposes similar to those for which this Association
was created, which organizations are exempt organizations
described in Section 501(c) of the Internal Revenue Code of 1986.
ARTICLE IX
DURATION
The corporation shall exist perpetually.
- 4 -

ARTICLE X
. Amendment of these Articles shall -require the assent of
Members entitled to cast sixty-seven percent (67%) of the total
votes of the Association.
ARTICLE XI
INDEMNIFICATION
The Corporation shall indemnify any director or former
director and any officer or former officer of the Association
against all expenses and liabilities, including attorneys' fees,
reasonably incurred by or imposed upon him in connection with any
action, suit or proceeding to which he is made a party or
threatened to be made a party by reason of his being or having
been a director or officer of the Association, except in relation
to matters as to which he shall be adjudged in such action, suit
or proceeding to have acted in bad faith or to have been liable or
guilty by reason of willful misconduct in the performance of
duty. Expenses incurred by any person indemnified hereunder in
defending an action may be paid by the Association in advance of
the final disposition of such action if authorized by the Board of
Directors in the specific case, upon receipt of an undertaking by
or on behalf of the indemnified person to repay such amount if it
shall be ultimately determined that he is not entitled to be
indemnified by the Association pursuant to this Article or
otherwise. Notwithstanding any other provision of this Article or
the Bylaws, in the event of a claim for reimbursement or
indemnification based upon a settlement by the director or officer
seeking reimbursement or indemnification, the indemnification
shall apply only if the Board of Directors approves in advance
such settlement and reimbursement as being in the best interests
of the Association. This indemnification shall be in addition to
any other indemnification to which directors and officers are
entitled, by law or under these Articles. The indemnifications
provided herein may not be reduced retroactively, but any
reduction or limitation shall have prospective effect only.
ARTICLE XII
INCORPORATOR
The name and address of the incorporator is as follows:
Name Address
Pamela D. Duncan 1500 Renaissance Plaza
230 North Elm Street
Greensboro, N.C. 27401
- 5 -

IN WITNESS WHEREOF, I, the undersigned incorporator, have
hereunto set my hand and seal this (nn' day of ruQ
1995.
a �l cam— (SEAL)
P mela D. Duncan
Incorporator
NORTH CAROLINA
THIS IS TO CERTIFY, that on the 6 day of L 9 S—*,
before me, a Notary Public, personally appeared PAME A D. DUNCAN,
who I am satisfied is the person named in and who executed the
foregoing Articles of Incorporation, and I having first made known
to her the contents thereof, she did acknowledge that she signed
and delivered the same as her voluntary act and deed for the uses
and purposes therein expressed.
IN TESTIMONY WHEREOF, I have hereunto set my hand and seal
this the 6M day of 62AAL L, 1995.
My Commission Expires:
(Notary Stamp/Seal)
'J
Notary Public

Exhibit A
All of that land shown on the plat entitled "Landfall
Subdivision II, Block 19," which appears of record in the
Office of the Register of Deeds of New Hanover County, North
Carolina, in Map Book 34, Page 341 ("Block 19"); and
All of that land shown on the plats entitled "Landfall
Subdivision II, Block 23," which appear of record in the
Office of the Register of Deeds of New Hanover County, North
Carolina, in Map Book 34, Pages 342, 343, 344, 345
and 346 ("Block 23").
J

PATON / ZUCCHINO
1k"nr.i:lreI�.VA.
March 17. 1995
Mr. Jeff Richter
U.S. Army Corps of Engineers
Wilmington District
Regulatory Branch
P.O. Box 1890
Wilmington, NC 28402-1890
RE: Individual 404 Permit
Horseshoe Lake Complex
Landfall
Dear Mr. Richter:
Attached for your review is the mitigation monitoring plan you requested at our last
meeting. Let me know if you find this document to be complete.
I have not been able to reach you directly by phone over the past two weeks. However,
based on the discussions in our last meeting, we assume that the public notice for the
permit has been issued. Please forward to the a copy of the notice for my files.
Please continue to feel free to contact me regarding any aspect of the permit request
submittal package.
Very truly yours.
Lo� �Gc &"
Lawrence R. Zucchino, ASL.A
Paton/Zucchino & Associates. P.A.
Attachment
LRZ/cac
•—
Land Plannin
Landsc:gn :lrciiiu:cuue
C.o. yer Squaw.
1, Glen%owd:1v,:.
Raleich. N.C. _' 603
q'I-834-CU'20

APPENDIX E
SUPPORTING SUMMARY INFORMATION FOR WETLAND MITIGATION
ASSOCIATED WITH THE
HORSESHOE LAKE COMPLEX AT LANDFALL, NC
SUCCESS CRITERIA AND MONITORING PLAN
Mitigation success criteria have been based on characteristic components of wetlands that are necessary
for a Section 404 jurisdictional determination. Criteria used to determine mitigation success for proposed
forested areas (see Plat 6, Upper Horseshoe Lake Mitigation Plan) are based primarily on "Compensatory
Hardwood Mitigation Guidelines" provided by the U.S. Army Corps of Engineers (ACOE Wilmington
District, 12/8/93).
Hydrology. The mitigation areas should be saturated for sufficient duration, used normal climatic
conditions, necessary for a wetland jurisdictional determination using the "Corps of Engineers Wetlands
Delineation Manual" (Technical Report Y-87-1, January 1987).
Soils. Soils of the mitigation site should be suitable to support target plant species.
Vegetation. For mitigation areas proposed to he dominated by woody species, a minimum density of 320
trees per acre shall survive for at least three years. Should survivorship of planted species fall below 320
trees per acre, then replanting will be done as necessary. For mitigation areas proposed to be dominated
by herbaceous species, a relative coverage of 60 percent of wetland species should be achieved at the end
of the first growing season, and 80 percent of wetland species for the next two consecutive years. Should
survivorship of wetland species fall below 60 percent at the end of year one or 80 percent at the end of
years two or three, replanting will be done as necessary to accomplish an 80 percent survivorship rat..
The survivorship of planted herbaceous species shall be based on a qualitative assessment of relative
coverage.
fi�3[i7••IEC�I;iI2[ ; .
A three-year monitoring plan is proposed and summarized below
Year 1. Collection of baseline data, establish sampling procedures (stations and transects), and prepare an
"as -built" report. First year monitoring will focus on hydrology and transplanted wetland vegetation
survival and coverage/growth. Results of sampling and first year monitoring will be reported in an end -
of -year report.
Year 2. The second -year monitoring will focus on survival and coverage/growth of transplanted wetland
vegetation and hydrology (if necessary) of the area. Results of the monitoring will be reported in an end -
of -year report.
Year 3. The third -year monitoring will focus on survival and coverage/growth of transplanted wetland
vegetation and hydrology (if necessary) of the area. Results of the monitoring will be reported in an end -
of -year report will address not only the third growing season, but will summarize the entire monitoring
study.
Horseshoe Lake Complex at Landfall
March 15, 1995

APPENDIX E
The following parameters will be assess in annual reports
Hvdroloay. Hydrologic activity in the mitigation areas will be characterized by monitoring shallow
monitoring wells, water level gages, and semi -continuous water level recording devices (probably a WL-
40). Well installation will be patterned after the U.S. Army Corps of Engineers' "Installing Monitoring
Wells/Piezometers in gages will be surveyed for location and elevation above sea level. The number and
location of monitoring wells will be designed to characterize the hydrologic activity for all communities
within the mitigation areas. Hydrology sampling will continue throughout the growing season at intervals
necessary to satisfy the hydrology success criteria. Sampling of the hydrology will occur until adequate
hydrological conditions are met within the 3-year monitoring period.
Vegetation. Vegetation will be monitored along established transects through representative communities
of the mitigation area. Transects will be placed in the vicinity of monitoring wells were possible.
Transplanted wetland vegetation will be sampled at the end of the growing season for each of the three
monitoring years. Tree Seedlings n: ll be monitored using nlnt'e of enr eient 6,— thstwill t e in
accordance with ACOE guidelines. Herbaceous vegetation coverage will be monitored with '1.0 meter
square quadrates along the transects. Monitored tree seedlings will be tagged, identified, and measured to
determine growth and percent survival.
Photographs taken at established fixed points during vegetation sampling will provide visual
documentation of the mitigation area. Additional photographs may be taken to show particular on -site
features or changes. The photographs will be incorporated into the annual reports.
Horseshoe Lake Complex at Landfall
March 15, 1995

United States Army Corps of Engineers
19 95
Excavate 1.16 acres of cattail marsh and 3.00 acres of open
water in the existing Horseshoe Lake, inundate and fill 1.28
acres of man-made wetlands and 2.29 acres of natural wetlands
A permit to r Lake and fill 0.05 acre of
natural wetlands for the construction of a roa .
at Wilmington, New Hanover County North Carolina
has been Issued to Landfall Associates on October 181995
ATT14: Mr. Keit ooper
Address -of Permittee PO Box 5368, Hanover Center Station
Wiiminr,,,Jii, 11,5fULU_L.LlLa
Permit Number
ACTION I➢.. 199500221 District Commander
-r",ROBERT J. SPERBERG
COL, E.T
ENG FORM 4336 , Jul 81 (33 CFa 320.330) EOITION OF JUL 70 MAY BE USED
(Proponent: CEC W.OI