20170342 Ver 1_Stormwater Impact Statement_20170323

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1/ Our PQopte. You, 5utte,..
STORMWATER IMPACT STATEMENT AND
PRELIMINARY STORMWATER
MANAGEMENT PLAN
Bristol Subdivision
Apex, NC
Prepared For:
Pulte Home Corporation
1225 Crescent Green Drive, Suite 250
Cary, NC 27518
Prepared By:
WithersRavenel
115 MacKenan Drive
Cary, NC 27511
919.469.3340
License No. C-0832
September 2016
WR No. 02150265.00
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Jennifer C. Diaz, PE
Clay Parrish, EI

Bristol
Stormwater Impact Statement
Apex, North Carolina
INTRODUCTION
:0
WithersRavenel
Our People. Your Success.
Bristol Subdivision is a 150 -acre proposed housing development in Apex, North Carolina located within the
Cape Fear River Basin. The property, designated by the red lines in Figure 1, is situated along New Hill Olive
Chapel Road approximately/2-mile north of Old US Highway 1. The site is bordered by New Hill Olive Chapel
Road on the western boundary and a powerline easement on the eastern boundary. Little Beaver Creek is
located immediately north of the site and transects the northwestern corner of the site. Site drainage is
achieved via five unnamed tributaries of Little Beaver Creek that traverse the site. While a flood way and
flood plain have been established for Little Beaver Creek, the tributaries associated with the subject property
have not been studied as part of the Federal Emergency Management Agency's Flood Insurance Study for
Wake County, according to FIRM Map Number 3720071000K and 3720072000J.
Figure 1: Approximate site location outlined in red
This development is subject to the Town of Apex stormwater management ordinance. In compliance with
Section 6.1.7(a)(3) of the Town of Apex UDO, this impact statement serves to show the impacts from the
development site to the confluence point downstream where the area of the proposed development is less
than 10% of the total drainage area (the "10% point"). The purpose of this analysis is to ensure the proposed
development will not adversely impact existing infrastructure downstream of the site.
STORMWATER IMPACT STATEMENT
The site drains to Little Beaver Creek via five unnamed tributaries. This stream is located within a FEMA
mapped floodplain. Because the site is to detain the 1- and 10- year storms per Apex ordinance, flows exiting
the site will be reduced below pre -development levels at all points of analysis at the site boundary for the l-
and 10 -year events. To determine if detention has any adverse effects on downstream infrastructure, the
study was extended to the 10% point. The culvert located at New Hill Olive Chapel Road was identified as
infrastructure to be evaluated as part of this analysis.
The drainage area to a culvert immediately downstream of the site (POA - CULVERT) is approximately 2.09
square miles (1345 acres). Another point of analysis (POA) was established further downstream to determine
a POA such that the development area is less than 10% of the total drainage area; the drainage area to this
point of analysis (POA -10%) is approximately 2.96 square miles (1895 acres). The site is approximately 8% of
the total drainage area to POA -10%. The post -development peak flows at all points of analysis are reduced to
below pre -development levels, therefore demonstrating no adverse impacts on downstream infrastructure.
Bristol WR No. 02150265.00
Stormwater Impact Statement September 2016

Bristol :0 WithersRavenel
Stormwater Impact Statement Our People. Your Success.
Apex, North Carolina
PRELIMINARY STORMWATER MANAGEMENT PLAN
The proposed development will be comprised of single family homes and other associated infrastructure. This
development is subject to the Town of Apex Unified Development Ordinance Article 6. The purpose of this
study is to demonstrate the proposed site is in compliance with this ordinance.
The site in its existing conditions is mostly wooded and drains to Little Beaver Creek via five unnamed
tributaries. The site is also mostly comprised of HSG'D' soils.
The proposed development will increase impervious area to approximately 41% of the site. The impacts of
the increased runoff from the development will be mitigated, to the greatest extent practicable, with
stormwater control measures (SCM), including 5 wet ponds.
STORMWATER MANAGEMENT REQUIREMENTS
The proposed development is within the Cape Fear river basin. The site must therefore meet Town
requirements relating to town wide ordinances and policies for stormwater compliance for this watershed.
Post development peak flow is to be attenuated to predevelopment levels in the 1-, and 10 -year 24-hour
storms. The wet ponds shall be designed to achieve a minimum of 85% reduction in total suspended solids.
Peak Attenuation Summary
Point of Analysis #1
Point of Analysis #2
1 -Year 69.16 I
53.9
-15.26
-22/
10 -Year
100 -Year
178.18
278.31
170.55
327.07
-7.63
+48.76
-4%
+18%
Point of Analysis #3
Bristol WR No. 02150265.00
Stormwater Impact Statement September 2016
2

Bristol
Stormwater Impact Statement
Apex, North Carolina
Point of Analysis #4
:0
WithersRavenel
Our People. Your Success.
1 -Year 48.69
46.91
-1.78
10 -Year 123.1
118.59
-4.51
25 -Year 190.81
183.82
-6.99
Point of Analysis #5
-4%
-4%
-4%
Point of Analysis - Culvert
Point of Analysis —10% Point
Bristol WR No. 02150265.00
Stormwater Impact Statement September 2016
3

Bristol
Stormwater Impact Statement
Apex, North Carolina
:0
WithersRavenel
Our People. Your Success.
DRAINAGE AREA MAPS AND
BACKGROUND INFORMATION
Bristol
Stormwater Impact Statement
WR No. 02150265.00
September 2016

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Bristol
Stormwater Impact Statement
Apex, North Carolina
::
WithersRavenel
Our People. Your Success.
PON DPACK ROUTING
CALCULATIONS
Bristol WR No. 02150265.00
Stormwater Impact Statement September 2016

Inj
PASS TO CUL
I * —
Reach 10
AAddlink 70
POA -CUL
POA -10%o q
Ada�it? k 9 90 0
0
BYPASS TO 1 \0%
Addlink 100
E-POA#4 PRE-POA4
0 -4 Addlink 80 QIR
PRE-POA#3 PRE-POA#�
PRE-POA#1
Addlink 10 -7�;
PRE-POA#5 PRE-POA#5
Addlink 60
PRE-POA#2
PRE-POA#2
PRE-POA#1
Addlink 30
PRE-POA#1
Addlink 10 -7�;
PRE-POA#5 PRE-POA#5

Job File: K:\15\15-0260\150265-Bristol\H-H\2150265-PRE-BCP.PPW
Rain Dir: K:\15\15-0260\150265-Bristol\H-H\
JOB TITLE
Project Date: 7/29/2016
Project Engineer: asmolek
Project Title: Bristol
Project Comments:
PRE -DEVELOPMENT MODEL
7/29/2016
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 12:38 PM 7/29/2016

Table of Contents
Table of Contents
i
********************** MASTER SUMMARY **********************
Watershed....... Master Network Summary ............. 1.01
****************** DESIGN STORMS SUMMARY *******************
RDU 24 Hour Desi Design Storms ...................... 2.01
********************** TC CALCULATIONS *********************
BYPASS TO 100... Tc Calcs ........................... 3.01
BYPASS TO CUL... Tc Calcs ........................... 3.03
PRE-POA#1....... Tc Calcs ........................... 3.06
PRE-POA#2....... Tc Calcs ........................... 3.09
PRE-POA#3....... Tc Calcs ........................... 3.12
PRE-POA#4....... Tc Calcs ........................... 3.14
PRE-POA#5....... Tc Calcs ........................... 3.17
********************** CN CALCULATIONS *********************
BYPASS TO
100...
Runoff
CN -Area .....................
4.01
BYPASS TO
CUL...
Runoff
CN -Area .....................
4.02
PRE-POA#1.......
Runoff
CN -Area .....................
4.03
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 12:38 PM 7/29/2016

Table of Contents ii
Table of Contents (continued)
PRE-POA#2....... Runoff CN -Area ..................... 4.04
PRE-POA#3....... Runoff CN -Area ..................... 4.05
PRE-POA#4....... Runoff CN -Area ..................... 4.06
PRE-POA#5....... Runoff CN -Area ..................... 4.07
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 12:38 PM 7/29/2016

Type.... Master Network Summary Page 1.01
Name.... Watershed
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-PRE-bcp.ppw
MASTER DESIGN STORM SUMMARY
Network Storm Collection: RDU 24 Hour Desi
MASTER NETWORK SUMMARY
SCS Unit Hydrograph Method
(*Node=Outfall; +Node=Diversion;)
(Trun= HYG Truncation: Blank=None; L=Left; R=Rt; LR=Left&Rt)
Total
Depth
Rainfall
Return Event
in
Type
RNF
ID
------------
1
------
2.8300
----------------
Time -Depth Curve
----------------
RDU NOAA
lyr
10
4.9800
Time -Depth Curve
RDU NOAA
10yr
100
7.3700
Time -Depth Curve
RDU NOAA
100yr
MASTER NETWORK SUMMARY
SCS Unit Hydrograph Method
(*Node=Outfall; +Node=Diversion;)
(Trun= HYG Truncation: Blank=None; L=Left; R=Rt; LR=Left&Rt)
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 12:38 PM 7/29/2016
Max
Return
HYG Vol
Qpeak
Qpeak Max WSEL Pond Storage
Node ID
Type
Event
ac -ft
Trun
hrs
cfs ft ac -ft
-----------------
BYPASS TO
10%
----
AREA
------
1
----------
46.215
--
---------
12.3450
-------- -------- ------------
481.27
BYPASS TO
loo
AREA
10
123.372
12.3440
1220.82
BYPASS TO
loo
AREA
100
220.299
12.3440
1867.28
BYPASS TO
CUL
AREA
1
91.976
12.9270
446.93
BYPASS TO
CUL
AREA
10
240.291
12.9270
1173.38
BYPASS TO
CUL
AREA
100
424.958
12.9270
1919.79
*POA -10%
JCT
1
143.960
R
12.4710
899.09
*POA -10%
JCT
10
389.523
R
12.4700
2378.19
*POA -10%
JCT
100
701.776
R
12.4700
3847.92
POA -CUL
JCT
1
102.985
R
12.7400
590.83
POA -CUL
JCT
10
277.520
R
12.7400
1559.62
POA -CUL
JCT
100
499.120
R
12.7400
2554.03
PRE-POA#1
JCT
1
9.459
R
12.4470
90.29
PRE-POA#1
JCT
10
25.876
R
12.4470
234.34
PRE-POA#1
JCT
100
46.841
R
12.4470
368.13
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 12:38 PM 7/29/2016

Type.... Master Network Summary Page 1.02
Name.... Watershed
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-PRE-bcp.ppw
MASTER NETWORK SUMMARY
SCS Unit Hydrograph Method
(*Node=Outfall; +Node=Diversion;)
(Trun= HYG Truncation: Blank=None; L=Left; R=Rt; LR=Left&Rt)
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 12:38 PM 7/29/2016
Max
Return
HYG Vol
Qpeak
Qpeak Max WSEL Pond Storage
Node ID
Type
Event
ac -ft
Trun
hrs
cfs ft ac -ft
-----------------
PRE-POA#1
----
AREA
------
1
----------
10.713
--
---------
12.4470
----------------------------
90.29
PRE-POA#1
AREA
10
28.596
12.4470
234.34
PRE-POA#1
AREA
100
51.062
12.4470
368.13
PRE-POA#2
JCT
1
6.873
R
12.4930
69.16
PRE-POA#2
JCT
10
18.798
R
12.4140
178.18
PRE-POA#2
JCT
100
34.025
R
12.4140
278.31
PRE-POA#2
AREA
1
7.776
12.4930
69.16
PRE-POA#2
AREA
10
20.756
12.4140
178.18
PRE-POA#2
AREA
100
37.063
12.4140
278.31
PRE-POA#3
AREA
1
1.342
12.3420
15.42
PRE-POA#3
AREA
10
3.663
12.2900
39.60
PRE-POA#3
AREA
100
6.605
12.2900
60.69
PRE-POA#3
JCT
1
1.188
R
12.3420
15.42
PRE-POA#3
JCT
10
3.324
R
12.2900
39.60
PRE-POA#3
JCT
100
6.076
R
12.2900
60.69
PRE-POA#4
AREA
1
5.097
12.4370
48.69
PRE-POA#4
AREA
10
13.605
12.3640
123.10
PRE-POA#4
AREA
100
24.294
12.3640
190.81
PRE-POA#4
JCT
1
4.511
R
12.4370
48.69
PRE-POA#4
JCT
10
12.335
R
12.3640
123.10
PRE-POA#4
JCT
100
22.324
R
12.3640
190.81
PRE-POA#5
JCT
1
.962
R
12.4470
9.25
PRE-POA#5
JCT
10
2.572
R
12.4470
23.27
PRE-POA#5
JCT
100
4.609
R
12.4470
36.11
PRE-POA#5
AREA
1
1.086
12.4470
9.25
PRE-POA#5
AREA
10
2.837
12.4470
23.27
PRE-POA#5
AREA
100
5.017
12.4470
36.11
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Bentley PondPack (10.00.027.00) 12:38 PM 7/29/2016

Type.... Design Storms
Name.... RDU 24 Hour Desi
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-PRE-bcp.ppw
Title... Project Date: 7/29/2016
Project Engineer: asmolek
Project Title: Bristol
Project Comments:
PRE -DEVELOPMENT MODEL
7/29/2016
DESIGN STORMS SUMMARY
Design Storm File,ID = RDU 24 Hour Desi
Storm Tag Name = 1
Page 2.01
Data Type, File, ID = Time -Depth Curve RDU NOAA lyr
Storm Frequency = 1 yr
Total Rainfall Depth= 2.8300 in
Duration Multiplier = 1
Resulting Duration = 23.9999 hrs
Resulting Start Time= .0000 hrs Step= .0833 hrs End= 23.9999 hrs
Storm Tag Name = 10
Data Type, File, ID = Time -Depth Curve RDU NOAA 10yr
Storm Frequency = 10 yr
Total Rainfall Depth= 4.9800 in
Duration Multiplier = 1
Resulting Duration = 23.9904 hrs
Resulting Start Time= .0000 hrs Step= .0833 hrs End= 23.9904 hrs
Storm Tag Name = 100
Data Type, File, ID = Time -Depth Curve RDU NOAA 100yr
Storm Frequency = 100 yr
Total Rainfall Depth= 7.3700 in
Duration Multiplier = 1
Resulting Duration = 23.9990 hrs
Resulting Start Time= .0000 hrs Step= .0833 hrs End= 23.9990 hrs
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 12:38 PM 7/29/2016

Type.... Tc Calcs
Name.... BYPASS TO 100
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-PRE-bcp.ppw
Page 3.01
.........................................................................
........................................................................
TIME OF CONCENTRATION CALCULATOR
........................................................................
........................................................................
Segment #1: Tc: TR -55 Channel
Flow Area
Wetted Perimeter
Hydraulic Radius
Slope
Mannings n
Hydraulic Length
Avg.Velocity
6.0000 sq.ft
8.00 ft
.75 ft
.002361 ft/ft
.0300
3388.00 ft
1.99 ft/sec
Segment #1 Time: .4724 hrs
------------------------------------------------------------------------
Total Tc: .4724 hrs
SIN: Bentley Systems, Inc.
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Type.... Tc Calcs
Name.... BYPASS TO 100
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-PRE-bcp.ppw
Page 3.02
------------------------------------------------------------------------
Tc Equations used...
------------------------------------------------------------------------
SCS Channel Flow
R = Aq / Wp
V = (1.49 * (R**(2/3)) * (Sf**-0.5)) / n
Tc = (Lf / V) / (3600sec/hr)
Where: R = Hydraulic radius
Aq = Flow area, sq.ft.
Wp = Wetted perimeter, ft
V = Velocity, ft/sec
Sf = Slope, ft/ft
n = Mannings n
Tc = Time of concentration, hrs
Lf = Flow length, ft
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 12:38 PM 7/29/2016

Type.... Tc Calcs
Name.... BYPASS TO CUL
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-PRE-bcp.ppw
Page 3.03
.........................................................................
........................................................................
TIME OF CONCENTRATION CALCULATOR
........................................................................
........................................................................
Segment #1: Tc: TR -55 Sheet
Mannings n .2400
Hydraulic Length 100.00 ft
2yr, 24hr P 3.4400 in
Slope .010000 ft/ft
Avg.Velocity .09 ft/sec
Segment #1 Time: .3027 hrs
------------------------------------------------------------------------
Segment #2: Tc: TR -55 Shallow
Hydraulic Length 1187.00 ft
Slope .018000 ft/ft
Unpaved
Avg.Velocity 2.16 ft/sec
Segment #2 Time: .1523 hrs
------------------------------------------------------------------------
Segment #3: Tc: TR -55 Channel
Flow Area 6.0000 sq.ft
Wetted Perimeter 8.00 ft
Hydraulic Radius .75 ft
Slope .005550 ft/ft
Mannings n .0300
Hydraulic Length 10449.00 ft
Avg.Velocity 3.05 ft/sec
Segment 43 Time: .9503 hrs
------------------------------------------------------------------------
-------------------------
Total Tc: 1.4053 hrs
-------------------------
S/N: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 12:38 PM 7/29/2016

Type.... Tc Calcs
Name.... BYPASS TO CUL
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-PRE-bcp.ppw
Page 3.04
------------------------------------------------------------------------
Tc Equations used...
------------------------------------------------------------------------
SCS TR -55 Sheet Flow
Tc = (.007 * ((n * Lf) **0.8)) / ((P**.5) * (Sf **.4))
Where: Tc = Time of concentration, hrs
n = Mannings n
Lf = Flow length, ft
P = 2yr, 24hr Rain depth, inches
Sf = Slope, o
___= SCS TR -55 Shallow Concentrated Flow
Unpaved surface:
V = 16.1345 * (Sf**0.5)
Paved surface:
V = 20.3282 * (Sf**0.5)
Tc = (Lf / V) / (3600sec/hr)
Where: V = Velocity, ft/sec
Sf = Slope, ft/ft
Tc = Time of concentration, hrs
Lf = Flow length, ft
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 12:38 PM 7/29/2016

Type.... Tc Calcs
Name.... BYPASS TO CUL
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-PRE-bcp.ppw
___= SCS Channel Flow ---
R = Aq / Wp
V = (1.49 * (R** (2/3) * (Sf**-0.5)) / n
Tc = (Lf / V) / (3600sec/hr)
Where: R = Hydraulic radius
Aq = Flow area, sq.ft.
Wp = Wetted perimeter, ft
V = Velocity, ft/sec
Sf = Slope, ft/ft
n = Mannings n
Tc = Time of concentration, hrs
Lf = Flow length, ft
Page 3.05
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 12:38 PM 7/29/2016

Type.... Tc Calcs
Name.... PRE-POA#1
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-PRE-bcp.ppw
Page 3.06
.........................................................................
........................................................................
TIME OF CONCENTRATION CALCULATOR
........................................................................
........................................................................
Segment #1: Tc: TR -55 Sheet
Mannings n .2400
Hydraulic Length 100.00 ft
2yr, 24hr P 3.4400 in
Slope .010000 ft/ft
Avg.Velocity .09 ft/sec
Segment #1 Time: .3027 hrs
------------------------------------------------------------------------
Segment #2: Tc: TR -55 Shallow
Hydraulic Length 1187.00 ft
Slope .039000 ft/ft
Unpaved
Avg.Velocity 3.19 ft/sec
Segment #2 Time: .1035 hrs
------------------------------------------------------------------------
Segment #3: Tc: TR -55 Channel
Flow Area 6.0000 sq.ft
Wetted Perimeter 8.00 ft
Hydraulic Radius .75 ft
Slope .011000 ft/ft
Mannings n .0300
Hydraulic Length 3819.00 ft
Avg.Velocity 4.30 ft/sec
Segment 43 Time: .2467 hrs
------------------------------------------------------------------------
-------------------------
Total Tc: .6529 hrs
-------------------------
S/N: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 12:38 PM 7/29/2016

Type.... Tc Calcs
Name.... PRE-POA#1
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-PRE-bcp.ppw
Page 3.07
------------------------------------------------------------------------
Tc Equations used...
------------------------------------------------------------------------
SCS TR -55 Sheet Flow
Tc = (.007 * ((n * Lf) **0.8)) / ((P**.5) * (Sf **.4))
Where: Tc = Time of concentration, hrs
n = Mannings n
Lf = Flow length, ft
P = 2yr, 24hr Rain depth, inches
Sf = Slope, o
___= SCS TR -55 Shallow Concentrated Flow
Unpaved surface:
V = 16.1345 * (Sf**0.5)
Paved surface:
V = 20.3282 * (Sf**0.5)
Tc = (Lf / V) / (3600sec/hr)
Where: V = Velocity, ft/sec
Sf = Slope, ft/ft
Tc = Time of concentration, hrs
Lf = Flow length, ft
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 12:38 PM 7/29/2016

Type.... Tc Calcs
Name.... PRE-POA#1
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-PRE-bcp.ppw
___= SCS Channel Flow ---
R = Aq / Wp
V = (1.49 * (R** (2/3) * (Sf**-0.5)) / n
Tc = (Lf / V) / (3600sec/hr)
Where: R = Hydraulic radius
Aq = Flow area, sq.ft.
Wp = Wetted perimeter, ft
V = Velocity, ft/sec
Sf = Slope, ft/ft
n = Mannings n
Tc = Time of concentration, hrs
Lf = Flow length, ft
Page 3.08
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 12:38 PM 7/29/2016

Type.... Tc Calcs
Name.... PRE-POA#2
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-PRE-bcp.ppw
Page 3.09
.........................................................................
........................................................................
TIME OF CONCENTRATION CALCULATOR
........................................................................
........................................................................
Segment #1: Tc: TR -55 Sheet
Mannings n .2400
Hydraulic Length 100.00 ft
2yr, 24hr P 3.4400 in
Slope .010000 ft/ft
Avg.Velocity .09 ft/sec
Segment #1 Time: .3027 hrs
------------------------------------------------------------------------
Segment #2: Tc: TR -55 Shallow
Hydraulic Length 1237.00 ft
Slope .040000 ft/ft
Unpaved
Avg.Velocity 3.23 ft/sec
Segment #2 Time: .1065 hrs
------------------------------------------------------------------------
Segment #3: Tc: TR -55 Channel
Flow Area 6.0000 sq.ft
Wetted Perimeter 8.00 ft
Hydraulic Radius .75 ft
Slope .012300 ft/ft
Mannings n .0300
Hydraulic Length 3200.00 ft
Avg.Velocity 4.55 ft/sec
Segment 43 Time: .1955 hrs
------------------------------------------------------------------------
-------------------------
Total Tc: .6047 hrs
-------------------------
S/N: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 12:38 PM 7/29/2016

Type.... Tc Calcs
Name.... PRE-POA#2
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-PRE-bcp.ppw
Page 3.10
------------------------------------------------------------------------
Tc Equations used...
------------------------------------------------------------------------
SCS TR -55 Sheet Flow
Tc = (.007 * ((n * Lf) **0.8)) / ((P**.5) * (Sf **.4))
Where: Tc = Time of concentration, hrs
n = Mannings n
Lf = Flow length, ft
P = 2yr, 24hr Rain depth, inches
Sf = Slope, o
___= SCS TR -55 Shallow Concentrated Flow
Unpaved surface:
V = 16.1345 * (Sf**0.5)
Paved surface:
V = 20.3282 * (Sf**0.5)
Tc = (Lf / V) / (3600sec/hr)
Where: V = Velocity, ft/sec
Sf = Slope, ft/ft
Tc = Time of concentration, hrs
Lf = Flow length, ft
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 12:38 PM 7/29/2016

Type.... Tc Calcs
Name.... PRE-POA#2
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-PRE-bcp.ppw
___= SCS Channel Flow ---
R = Aq / Wp
V = (1.49 * (R** (2/3) * (Sf**-0.5)) / n
Tc = (Lf / V) / (3600sec/hr)
Where: R = Hydraulic radius
Aq = Flow area, sq.ft.
Wp = Wetted perimeter, ft
V = Velocity, ft/sec
Sf = Slope, ft/ft
n = Mannings n
Tc = Time of concentration, hrs
Lf = Flow length, ft
Page 3.11
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 12:38 PM 7/29/2016

Type.... Tc Calcs
Name.... PRE-POA#3
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-PRE-bcp.ppw
Page 3.12
.........................................................................
........................................................................
TIME OF CONCENTRATION CALCULATOR
........................................................................
........................................................................
Segment #1: Tc: TR -55 Sheet
Mannings n
Hydraulic Length
2yr, 24hr P
Slope
Avg.Velocity
.2400
100.00 ft
3.4400 in
010000 ft/ft
.09 ft/sec
Segment #1 Time: .3027 hrs
------------------------------------------------------------------------
Segment #2: Tc: TR -55 Shallow
Hydraulic Length 1192.00 ft
Slope .047000 ft/ft
Unpaved
Avg.Velocity 3.50 ft/sec
Segment #2 Time: .0947 hrs
------------------------------------------------------------------------
Total Tc: .3973 hrs
------------------------
S/N: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 12:38 PM 7/29/2016

Type.... Tc Calcs
Name.... PRE-POA#3
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-PRE-bcp.ppw
Page 3.13
------------------------------------------------------------------------
Tc Equations used...
------------------------------------------------------------------------
SCS TR -55 Sheet Flow
Tc = (.007 * ((n * Lf) **0.8)) / ((P**.5) * (Sf **.4))
Where: Tc = Time of concentration, hrs
n = Mannings n
Lf = Flow length, ft
P = 2yr, 24hr Rain depth, inches
Sf = Slope, o
___= SCS TR -55 Shallow Concentrated Flow
Unpaved surface:
V = 16.1345 * (Sf**0.5)
Paved surface:
V = 20.3282 * (Sf**0.5)
Tc = (Lf / V) / (3600sec/hr)
Where: V = Velocity, ft/sec
Sf = Slope, ft/ft
Tc = Time of concentration, hrs
Lf = Flow length, ft
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 12:38 PM 7/29/2016

Type.... Tc Calcs
Name.... PRE-POA#4
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-PRE-bcp.ppw
Page 3.14
.........................................................................
........................................................................
TIME OF CONCENTRATION CALCULATOR
........................................................................
........................................................................
Segment #1: Tc: TR -55 Sheet
Mannings n .2400
Hydraulic Length 100.00 ft
2yr, 24hr P 3.4400 in
Slope .010000 ft/ft
Avg.Velocity .09 ft/sec
Segment #1 Time: .3027 hrs
------------------------------------------------------------------------
Segment #2: Tc: TR -55 Shallow
Hydraulic Length 2153.00 ft
Slope .031000 ft/ft
Unpaved
Avg.Velocity 2.84 ft/sec
Segment #2 Time: .2105 hrs
------------------------------------------------------------------------
Segment #3: Tc: TR -55 Channel
Flow Area 6.0000 sq.ft
Wetted Perimeter 8.00 ft
Hydraulic Radius .75 ft
Slope .016400 ft/ft
Mannings n .0300
Hydraulic Length 611.00 ft
Avg.Velocity 5.25 ft/sec
Segment 43 Time: .0323 hrs
------------------------------------------------------------------------
-------------------------
Total Tc: .5455 hrs
-------------------------
S/N: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 12:38 PM 7/29/2016

Type.... Tc Calcs
Name.... PRE-POA#4
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-PRE-bcp.ppw
Page 3.15
------------------------------------------------------------------------
Tc Equations used...
------------------------------------------------------------------------
SCS TR -55 Sheet Flow
Tc = (.007 * ((n * Lf) **0.8)) / ((P**.5) * (Sf **.4))
Where: Tc = Time of concentration, hrs
n = Mannings n
Lf = Flow length, ft
P = 2yr, 24hr Rain depth, inches
Sf = Slope, o
___= SCS TR -55 Shallow Concentrated Flow
Unpaved surface:
V = 16.1345 * (Sf**0.5)
Paved surface:
V = 20.3282 * (Sf**0.5)
Tc = (Lf / V) / (3600sec/hr)
Where: V = Velocity, ft/sec
Sf = Slope, ft/ft
Tc = Time of concentration, hrs
Lf = Flow length, ft
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 12:38 PM 7/29/2016

Type.... Tc Calcs
Name.... PRE-POA#4
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-PRE-bcp.ppw
___= SCS Channel Flow ---
R = Aq / Wp
V = (1.49 * (R** (2/3) * (Sf**-0.5)) / n
Tc = (Lf / V) / (3600sec/hr)
Where: R = Hydraulic radius
Aq = Flow area, sq.ft.
Wp = Wetted perimeter, ft
V = Velocity, ft/sec
Sf = Slope, ft/ft
n = Mannings n
Tc = Time of concentration, hrs
Lf = Flow length, ft
Page 3.16
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 12:38 PM 7/29/2016

Type.... Tc Calcs
Name.... PRE-POA#5
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-PRE-bcp.ppw
Page 3.17
.........................................................................
........................................................................
TIME OF CONCENTRATION CALCULATOR
........................................................................
........................................................................
Segment #1: Tc: TR -55 Sheet
Mannings n .2400
Hydraulic Length 100.00 ft
2yr, 24hr P 3.4400 in
Slope .010000 ft/ft
Avg.Velocity .09 ft/sec
Segment #1 Time: .3027 hrs
------------------------------------------------------------------------
Segment #2: Tc: TR -55 Shallow
Hydraulic Length 1187.00 ft
Slope .039000 ft/ft
Unpaved
Avg.Velocity 3.19 ft/sec
Segment #2 Time: .1035 hrs
------------------------------------------------------------------------
Segment #3: Tc: TR -55 Channel
Flow Area 6.0000 sq.ft
Wetted Perimeter 8.00 ft
Hydraulic Radius .75 ft
Slope .011000 ft/ft
Mannings n .0300
Hydraulic Length 3819.00 ft
Avg.Velocity 4.30 ft/sec
Segment 43 Time: .2467 hrs
------------------------------------------------------------------------
-------------------------
Total Tc: .6529 hrs
-------------------------
S/N: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 12:38 PM 7/29/2016

Type.... Tc Calcs
Name.... PRE-POA#5
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-PRE-bcp.ppw
Page 3.18
------------------------------------------------------------------------
Tc Equations used...
------------------------------------------------------------------------
SCS TR -55 Sheet Flow
Tc = (.007 * ((n * Lf) **0.8)) / ((P**.5) * (Sf **.4))
Where: Tc = Time of concentration, hrs
n = Mannings n
Lf = Flow length, ft
P = 2yr, 24hr Rain depth, inches
Sf = Slope, o
___= SCS TR -55 Shallow Concentrated Flow
Unpaved surface:
V = 16.1345 * (Sf**0.5)
Paved surface:
V = 20.3282 * (Sf**0.5)
Tc = (Lf / V) / (3600sec/hr)
Where: V = Velocity, ft/sec
Sf = Slope, ft/ft
Tc = Time of concentration, hrs
Lf = Flow length, ft
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 12:38 PM 7/29/2016

Type.... Tc Calcs
Name.... PRE-POA#5
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-PRE-bcp.ppw
___= SCS Channel Flow ---
R = Aq / Wp
V = (1.49 * (R** (2/3) * (Sf**-0.5)) / n
Tc = (Lf / V) / (3600sec/hr)
Where: R = Hydraulic radius
Aq = Flow area, sq.ft.
Wp = Wetted perimeter, ft
V = Velocity, ft/sec
Sf = Slope, ft/ft
n = Mannings n
Tc = Time of concentration, hrs
Lf = Flow length, ft
Page 3.19
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 12:38 PM 7/29/2016

Type.... Runoff CN -Area
Name.... BYPASS TO 100
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-PRE-bcp.ppw
Page 4.01
RUNOFF CURVE NUMBER DATA
..........................................................................
..........................................................................
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 12:38 PM 7/29/2016
Impervious
Area
Adjustment
Adjusted
Soil/Surface Description
CN
acres
%C %UC
CN
--------------------------------
OFFSITE -
Open
----
80
---------
33.300
----- -----
------
80.00
OFFSITE -
Water
100
9.800
100.00
OFFSITE -
Ag
78
98.600
78.00
OFFSITE -
Imp
98
4.800
98.00
OFFSITE -
Woods
77
403.000
77.00
COMPOSITE
...........................................................................
...........................................................................
AREA & WEIGHTED CN --->
549.500
77.95 (78)
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 12:38 PM 7/29/2016

Type.... Runoff CN -Area
Name.... BYPASS TO CUL
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-PRE-bcp.ppw
Page 4.02
RUNOFF CURVE NUMBER DATA
..........................................................................
..........................................................................
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 12:38 PM 7/29/2016
Impervious
Area
Adjustment
Adjusted
Soil/Surface Description
CN
acres
%C %UC
CN
--------------------------------
OFFSITE-imp
----
98
---------
52.430
----- -----
------
98.00
OFFSITE -open
80
134.350
80.00
OFFSITE -wooded
77
727.150
77.00
OFFSITE-agri
78
121.850
78.00
COMPOSITE AREA & WEIGHTED CN --->
1035.780
78.57 (79)
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 12:38 PM 7/29/2016

Type.... Runoff CN -Area
Name.... PRE-POA#1
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-PRE-bcp.ppw
Page 4.03
RUNOFF CURVE NUMBER DATA
..........................................................................
..........................................................................
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 12:38 PM 7/29/2016
Impervious
Area
Adjustment
Adjusted
Soil/Surface Description
CN
acres
%C %UC
CN
--------------------------------
Impervious
----
98
---------
.910
----- -----
------
98.00
Open
80
.750
80.00
Wooded
77
58.250
77.00
Water
100
.990
100.00
OFFSITE -imp
98
3.320
98.00
OFFSITE -open
80
6.650
80.00
OFFSITE -wooded
77
56.500
77.00
COMPOSITE AREA & WEIGHTED CN --->
...........................................................................
............................................................................
127.370
78.05 (78)
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 12:38 PM 7/29/2016

Type.... Runoff CN -Area
Name.... PRE-POA#2
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-PRE-bcp.ppw
Page 4.04
RUNOFF CURVE NUMBER DATA
..........................................................................
..........................................................................
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 12:38 PM 7/29/2016
Impervious
Area
Adjustment
Adjusted
Soil/Surface Description
CN
acres
%C %UC
CN
--------------------------------
Impervious
----
98
---------
.960
----- -----
------
98.00
Open
80
1.270
80.00
Wooded
77
49.670
77.00
Water
100
1.080
100.00
OFFSITE -imp
98
1.970
98.00
OFFSITE -open
80
5.130
80.00
OFFSITE -wooded
77
32.370
77.00
COMPOSITE AREA & WEIGHTED CN --->
...........................................................................
............................................................................
92..450
78.14 (78)
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 12:38 PM 7/29/2016

Type.... Runoff CN -Area
Name.... PRE-POA#3
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-PRE-bcp.ppw
Page 4.05
RUNOFF CURVE NUMBER DATA
..........................................................................
..........................................................................
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 12:38 PM 7/29/2016
Impervious
Area
Adjustment
Adjusted
Soil/Surface Description
CN
acres
%C %UC
CN
--------------------------------
Impervious
----
98
---------
.300
----- -----
------
98.00
Open
80
.310
80.00
Wooded
77
16.260
77.00
COMPOSITE AREA & WEIGHTED CN --->
...........................................................................
...........................................................................
16.870
77.43 (77)
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 12:38 PM 7/29/2016

Type.... Runoff CN -Area
Name.... PRE-POA#4
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-PRE-bcp.ppw
Page 4.06
RUNOFF CURVE NUMBER DATA
..........................................................................
..........................................................................
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 12:38 PM 7/29/2016
Impervious
Area
Adjustment
Adjusted
Soil/Surface Description
CN
acres
%C %UC
CN
--------------------------------
Open
----
80
---------
1.310
----- -----
------
80.00
Wooded
77
7.000
77.00
OFFSITE -imp
98
2.610
98.00
OFFSITE -open
80
6.790
80.00
OFFSITE -wooded
77
42.890
77.00
COMPOSITE AREA & WEIGHTED CN --->
...........................................................................
............................................................................
60.600
78.31 (78)
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 12:38 PM 7/29/2016

Type.... Runoff CN -Area
Name.... PRE-POA#5
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-PRE-bcp.ppw
Page 4.07
RUNOFF CURVE NUMBER DATA
..........................................................................
..........................................................................
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 12:38 PM 7/29/2016
Impervious
Area
Adjustment
Adjusted
Soil/Surface Description
CN
acres
%C %UC
CN
--------------------------------
Impervious
----
98
---------
.460
----- -----
------
98.00
Open
80
.240
80.00
Wooded
77
9.710
77.00
OFFSITE -imp
98
.260
98.00
OFFSITE -open
80
1.560
80.00
COMPOSITE AREA & WEIGHTED CN --->
...........................................................................
...........................................................................
12.230
78.68 (79)
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 12:38 PM 7/29/2016

Appendix A
Index of Starting Page Numbers for ID Names
----- B -----
BYPASS TO 100... 3.01, 4.01
BYPASS TO CUL... 3.03, 4.02
----- P -----
PRE-POA#1...
3.06,
4.03
PRE-POA#2...
3.09,
4.04
PRE-POA#3...
3.12,
4.05
PRE-POA#4...
3.14,
4.06
PRE-POA#5...
3.17,
4.07
----- R -----
RDU 24 Hour Desi... 2.01
----- W -----
Watershed... 1.01
A-1
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 12:38 PM 7/29/2016

7-"1;
Addlink 100
ST-POA#4 POA#4 BYPASS
PASS TO CU
WAddles
Route 5 ink 80
POST-POA#3 SaVI#5
SC W5
^O
�r
as
Q
tip
POA92-BYPASS
aor
�e
Op ��
w
Route 3
Addlink 120
Reac�3p Junc3
SC#3 SCM#3
w �Addlink
13p POA -CU
Reach 4040
Route 44 110
POST-POA#2 Ro SUVW4
°tet
SCM#4
Pda�mK
Addlink 90
SSD
SCNW2
SCK #2
POA -l0% qaa//nk
"0
BYPASS TO 10%
0
pddhnk70 POA#1-BYPASS
POST-POA#1Route
SCN#1
Addles ink 30
SCK#1
Addl~
POST-POA#5 POA#5-BYPASS

Job File: K:\15\15-0260\150265-Bristol\H-H\2150265-POST.PPW
Rain Dir: K:\15\15-0260\150265-Bristol\H-H\
JOB TITLE
Project Date: 9/9/2016
Project Engineer: Parrish
Project Title: Bristol
Project Comments:
POST -DEVELOPMENT MODEL
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Table of Contents
Table of Contents
i
********************** MASTER SUMMARY *********************
Watershed....... Master Network Summary ............. 1.01
****************** DESIGN STORMS SUMMARY *******************
RDU 24 Hour Desi Design Storms ...................... 2.01
********************** TC CALCULATIONS *********************
BYPASS TO 10%... Tc Calcs ........................... 3.01
BYPASS TO CUL... Tc Calcs ........................... 3.03
POA#1-BYPASS .... Tc Calcs ........................... 3.06
POA#2-BYPASS.... Tc Calcs ........................... 3.09
POA#4 BYPASS.... Tc Calcs ........................... 3.12
POA#5-BYPASS.... Tc Calcs ........................... 3.15
SCM#1........... Tc Calcs ........................... 3.17
SCM#2........... Tc Calcs ........................... 3.19
SCM#3........... Tc Calcs ........................... 3.21
SCM#4........... Tc Calcs ........................... 3.23
SCM#5........... Tc Calcs ........................... 3.25
********************** CN CALCULATIONS *********************
BYPASS TO 10%... Runoff CN -Area ..................... 4.01
SIN:
Bentley PondPack (10.00.027.00)
4:29 PM
Bentley Systems, Inc.
9/8/2016

Table of Contents
Table of Contents (continued)
ii
BYPASS TO CUL...
Runoff
CN
-Area .....................
4.02
POA#1-BYPASS....
Runoff
CN
-Area .....................
4.03
POA#2-BYPASS....
REACH
Runoff
CN
-Area .....................
4.04
POA#4
BYPASS....
Runoff
CN
-Area .....................
4.05
POA#5-BYPASS....
REACH
Runoff
CN
-Area .....................
4.06
SCM#1...........
Runoff
CN
-Area .....................
4.07
SCM#2...........
REACH
Runoff
CN
-Area .....................
4.08
SCM#3...........
Runoff
CN
-Area .....................
4.09
SCM#4...........
REACH
Runoff
CN
-Area .....................
4.10
SCM#5...........
Runoff
CN
-Area .....................
4.11
******************* REACH ROUTING ******************
REACH
10........
1
Reach
Routing
Summary ..............
5.01
REACH
10........
10
Reach
Routing
Summary ..............
5.02
REACH
10........
100
Reach
Routing
Summary ..............
5.03
REACH
2O........
1
Reach
Routing
Summary ..............
5.04
REACH
2O........
10
Reach
Routing
Summary ..............
5.05
REACH
2O........
100
Reach
Routing
Summary ..............
5.06
REACH 30........ 1
Reach Routing Summary .............. 5.07
REACH 30........ 10
Reach Routing Summary .............. 5.08
SIN:
Bentley PondPack (10.00.027.00)
4:29 PM
Bentley Systems, Inc.
9/8/2016

Table of Contents
Table of Contents (continued)
iii
REACH 30........ 100
Reach Routing Summary .............. 5.09
REACH 40........ 1
Reach Routing Summary .............. 5.10
REACH 40........ 10
Reach Routing Summary .............. 5.11
REACH 40........ 100
Reach Routing Summary .............. 5.12
*********************** POND VOLUMES ***********************
SCM#1........... Vol: Elev-Area ..................... 6.01
SCM#2........... Vol: Elev-Area ..................... 6.02
SCM#3........... Vol: Elev-Area ..................... 6.03
SCM#4........... Vol: Elev-Area ..................... 6.04
SCM#5........... Vol: Elev-Area ..................... 6.05
******************** OUTLET STRUCTURES *********************
Outlet
1........
Outlet Input Data ..................
7.01
Composite Rating Curve .............
7.04
Outlet
2........
Outlet Input Data ..................
7.06
Composite Rating Curve .............
7.09
Outlet
3........
Outlet Input Data ..................
7.11
Composite Rating Curve .............
7.14
Outlet
4........
Outlet Input Data ..................
7.16
Composite Rating Curve .............
7.19
Outlet 5........ Outlet Input Data .................. 7.21
SIN:
Bentley PondPack (10.00.027.00)
4:29 PM
Bentley Systems, Inc.
9/8/2016

Table of Contents
iv
Table of Contents (continued)
Composite Rating Curve ............. 7.24
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Master Network Summary Page 1.01
Name.... Watershed
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
MASTER DESIGN STORM SUMMARY
Network Storm Collection: RDU 24 Hour Desi
MASTER NETWORK SUMMARY
SCS Unit Hydrograph Method
(*Node=Outfall; +Node=Diversion;)
(Trun= HYG Truncation: Blank=None; L=Left; R=Rt; LR=Left&Rt)
Total
Depth
Rainfall
Return
Return Event
in
Type
RNF
ID
1
2.8300
Time -Depth Curve
RDU NOAA
lyr
10
4.9800
Time -Depth Curve
RDU NOAA
10yr
100
7.3700
Time -Depth Curve
RDU NOAA
100yr
MASTER NETWORK SUMMARY
SCS Unit Hydrograph Method
(*Node=Outfall; +Node=Diversion;)
(Trun= HYG Truncation: Blank=None; L=Left; R=Rt; LR=Left&Rt)
SIN:
Bentley PondPack (10.00.027.00)
4:29 PM
Bentley Systems, Inc.
9/8/2016
Max
Return
HYG Vol
Qpeak
Qpeak Max WSEL Pond Storage
Node ID
Type
Event
ac -ft
Trun
hrs
cfs ft ac -ft
-----------------
BYPASS TO 10%
----
AREA
------
1
----------
46.215
--
---------
12.3450
-------- -------- ------------
481.27
BYPASS TO 10%
AREA
10
123.372
12.3440
1220.82
BYPASS TO 10%
AREA
100
220.299
12.3440
1867.28
BYPASS TO CUL
AREA
1
91.976
12.9270
446.93
BYPASS TO CUL
AREA
10
240.291
12.9270
1173.38
BYPASS TO CUL
AREA
100
424.958
12.9270
1919.79
JUNC 3
JCT
1
.060
R
16.7440
.09
JUNC 3
JCT
10
.462
R
12.5640
1.83
JUNC 3
JCT
100
1.161
R
12.1890
17.78
POA#1-BYPASS
AREA
1
8.995
12.4470
77.25
POA#1-BYPASS
AREA
10
23.011
12.4470
188.74
POA#1-BYPASS
AREA
100
40.309
12.4470
289.47
POA#2-BYPASS
AREA
1
5.878
12.4150
53.16
POA#2-BYPASS
AREA
10
15.038
12.4140
129.20
POA#2-BYPASS
AREA
100
26.342
12.4140
197.02
SIN:
Bentley PondPack (10.00.027.00)
4:29 PM
Bentley Systems, Inc.
9/8/2016

Type.... Master Network Summary Page 1.02
Name.... Watershed
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
MASTER NETWORK SUMMARY
SCS Unit Hydrograph Method
(*Node=Outfall; +Node=Diversion;)
(Trun= HYG Truncation: Blank=None; L=Left; R=Rt; LR=Left&Rt)
SIN:
Bentley PondPack (10.00.027.00)
4:29 PM
Bentley Systems, Inc.
9/8/2016
Max
Return
HYG Vol
Qpeak
Qpeak Max WSEL Pond Storage
Node ID
Type
Event
ac -ft
Trun
hrs
cfs ft ac -ft
POA#4 BYPASS
AREA
1
4.910
12.4370
46.91
POA#4 BYPASS
AREA
10
13.107
12.3640
118.59
POA#4 BYPASS
AREA
100
23.404
12.3640
183.82
POA#5-BYPASS
AREA
1
.317
12.1050
6.86
POA#5-BYPASS
AREA
10
.846
12.0940
16.25
POA#5-BYPASS
AREA
100
1.511
12.1050
23.56
*POA -10%
JCT
1
140.534
R
12.4710
848.77
*POA -10%
JCT
10
387.786
R
12.4700
2340.08
*POA -10%
JCT
100
702.166
R
12.4460
3882.33
POA -CUL
JCT
1
99.559
R
12.7400
550.97
POA -CUL
JCT
10
275.784
R
12.7400
1512.25
POA -CUL
JCT
100
499.510
R
12.7400
2482.55
POST-POA#1
JCT
1
8.437
R
12.4470
77.81
POST-POA#1
JCT
10
25.750
R
12.4460
229.96
POST-POA#1
JCT
100
47.398
R
12.3600
372.19
POST-POA#2
JCT
1
6.205
R
12.4150
53.90
POST-POA#2
JCT
10
19.837
R
12.4140
170.55
POST-POA#2
JCT
100
37.532
R
12.2930
327.07
POST-POA#3
JCT
1
.299
R
19.1400
.43
POST-POA#3
JCT
10
2.944
R
12.3010
30.76
POST-POA#3
JCT
100
6.451
R
12.1730
96.02
POST-POA#4
JCT
1
4.346
R
12.4370
46.91
POST-POA#4
JCT
10
11.883
R
12.3640
118.59
POST-POA#4
JCT
100
21.506
R
12.3640
183.82
POST-POA#5
JCT
1
.284
R
12.1050
6.86
POST-POA#5
JCT
10
.774
R
12.0940
16.25
POST-POA#5
JCT
100
1.399
R
12.1050
23.56
SIN:
Bentley PondPack (10.00.027.00)
4:29 PM
Bentley Systems, Inc.
9/8/2016

Type.... Master Network Summary Page 1.03
Name.... Watershed
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
MASTER NETWORK SUMMARY
SCS Unit Hydrograph Method
(*Node=Outfall; +Node=Diversion;)
(Trun= HYG Truncation: Blank=None; L=Left; R=Rt; LR=Left&Rt)
SIN:
Bentley PondPack (10.00.027.00)
Return
HYG Vol
Qpeak
Node ID
Pond Storage
Type
Event
ac -ft
Trun
SCM#1
102.64
AREA
1
4.757
178.78
SCM#1
AREA
10
9.852
SCM#1
102.64
AREA
100
15.669
178.78
SCM#1
IN
POND
1
4.399
R
SCM#1
IN
POND
10
9.191
R
SCM#1
IN
POND
100
14.707
R
SCM#1
OUT
POND
1
.444
R
SCM#1
OUT
POND
10
4.851
R
SCM#1
OUT
POND
100
10.326
R
SCM#2
AREA
1
2.181
SCM#2
1.36
AREA
10
4.516
47.14
SCM#2
2.018
AREA
100
7.184
2.235
SCM#2
IN
POND
1
2.017
R
SCM#2
IN
POND
10
4.214
R
SCM#2
IN
POND
100
6.742
R
SCM#2
OUT
POND
1
.609
R
SCM#2
OUT
POND
10
2.754
R
SCM#2
OUT
POND
100
5.240
R
SCM#3
AREA
1
.565
SCM#3
AREA
10
1.213
SCM#3
AREA
100
1.962
SCM#3
IN
POND
1
.520
R
SCM#3
IN
POND
10
1.128
R
SCM#3
IN
POND
100
1.838
R
SCM#3
OUT
POND
1
.060
R
SCM#3
OUT
POND
10
.462
R
SCM#3
OUT
POND
100
1.161
R
SIN:
Bentley PondPack (10.00.027.00)
4:29 PM
Bentley Systems, Inc.
9/8/2016
Max
Qpeak
Qpeak
Max WSEL
Pond Storage
hrs
cfs
ft
ac -ft
12.1050
102.64
12.0940
178.78
12.1050
226.58
12.1050
102.64
12.0940
178.78
12.1050
226.58
19.3550
.65
276.71
3.955
12.2910
53.25
277.90
5.260
12.1770
147.33
278.78
6.287
12.1050
47.05
12.0940
81.96
12.1050
103.87
12.1050
47.05
12.0940
81.96
12.1050
103.87
14.9780
1.36
270.27
1.492
12.1950
47.14
271.20
2.018
12.1420
84.01
271.57
2.235
12.1050
12.33
12.0940
22.37
12.1040
28.84
12.1050
12.33
12.0940
22.37
12.1040
28.84
15.9140
.08
303.26
.460
12.5640
1.83
304.38
.749
12.1890
17.78
304.84
.878
4:29 PM
Bentley Systems, Inc.
9/8/2016

Type.... Master Network Summary Page 1.04
Name.... Watershed
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
MASTER NETWORK SUMMARY
SCS Unit Hydrograph Method
(*Node=Outfall; +Node=Diversion;)
(Trun= HYG Truncation: Blank=None; L=Left; R=Rt; LR=Left&Rt)
SIN:
Bentley PondPack (10.00.027.00)
Return
HYG Vol
Qpeak
Node ID
Pond Storage
Type
Event
ac -ft
Trun
SCM#4
72.45
AREA
1
3.335
128.74
SCM#4
AREA
10
7.034
SCM#4
72.45
AREA
100
11.282
128.74
SCM#4
IN
POND
1
3.077
R
SCM#4
IN
POND
10
6.553
R
SCM#4
IN
POND
100
10.578
R
SCM#4
OUT
POND
1
.309
R
SCM#4
OUT
POND
10
2.955
R
SCM#4
OUT
POND
100
6.890
R
SCM#5
AREA
1
3.046
SCM#5
.44
AREA
10
6.309
30.76
SCM#5
3.444
AREA
100
10.035
4.093
SCM#5
IN
POND
1
2.817
R
SCM#5
IN
POND
10
5.886
R
SCM#5
IN
POND
100
9.419
R
SCM#5
OUT
POND
1
.299
R
SCM#5
OUT
POND
10
2.944
R
SCM#5
OUT
POND
100
6.451
R
SIN:
Bentley PondPack (10.00.027.00)
4:29 PM
Bentley Systems, Inc.
9/8/2016
Max
Qpeak
Qpeak
Max WSEL
Pond Storage
hrs
cfs
ft
ac -ft
12.1050
72.45
12.0940
128.74
12.1050
164.53
12.1050
72.45
12.0940
128.74
12.1050
164.53
19.0550
.45
278.34
2.768
12.5150
20.40
279.87
4.114
12.1930
99.32
280.72
4.923
12.1050
65.73
12.0940
114.49
12.1050
145.10
12.1050
65.73
12.0940
114.49
12.1050
145.10
19.8360
.44
283.53
2.518
12.3010
30.76
284.62
3.444
12.1730
96.02
285.33
4.093
4:29 PM
Bentley Systems, Inc.
9/8/2016

Type.... Design Storms Page 2.01
Name.... RDU 24 Hour Desi
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Title... Project Date: 9/9/2016
Project Engineer: Parrish
Project Title: Bristol
Project Comments:
POST -DEVELOPMENT MODEL
DESIGN STORMS SUMMARY
Design Storm File,ID = RDU 24 Hour Desi
Storm Tag Name = 1
Data Type, File, ID = Time -Depth Curve RDU NOAA lyr
Storm Frequency = 1 yr
Total Rainfall Depth= 2.8300 in
Duration Multiplier = 1
Resulting Duration = 23.9999 hrs
Resulting Start Time= .0000 hrs Step= .0833 hrs End= 23.9999 hrs
Storm Tag Name = 10
Data Type, File, ID = Time -Depth Curve RDU NOAA 10yr
Storm Frequency = 10 yr
Total Rainfall Depth= 4.9800 in
Duration Multiplier = 1
Resulting Duration = 23.9904 hrs
Resulting Start Time= .0000 hrs Step= .0833 hrs End= 23.9904 hrs
Storm Tag Name = 100
Data Type, File, ID = Time -Depth Curve RDU NOAA 100yr
Storm Frequency = 100 yr
Total Rainfall Depth= 7.3700 in
Duration Multiplier = 1
Resulting Duration = 23.9990 hrs
Resulting Start Time= .0000 hrs Step= .0833 hrs End= 23.9990 hrs
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Tc Calcs
Name.... BYPASS TO 10%
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Page 3.01
........................................................................
........................................................................
TIME OF CONCENTRATION CALCULATOR
........................................................................
........................................................................
Segment #1: Tc: TR -55 Channel
Flow Area
Wetted Perimeter
Hydraulic Radius
Slope
Mannings n
Hydraulic Length
Avg.Velocity
6.0000 sq.ft
8.00 ft
.75 ft
.002361 ft/ft
.0300
3388.00 ft
1.99 ft/sec
Segment #1 Time: .4724 hrs
------------------------------------------------------------------------
Total Tc: .4724 hrs
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Tc Calcs
Name.... BYPASS TO 10%
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Page 3.02
------------------------------------------------------------------------
Tc Equations used...
------------------------------------------------------------------------
___= SCS Channel Flow
R = Aq / Wp
V = (1.49 * (R**(2/3)) * (Sf**-0.5)) / n
Tc = (Lf / V) / (3600sec/hr)
Where: R = Hydraulic radius
Aq = Flow area, sq.ft.
Wp = Wetted perimeter, ft
V = Velocity, ft/sec
Sf = Slope, ft/ft
n = Mannings n
Tc = Time of concentration, hrs
Lf = Flow length, ft
SIN:
Bentley PondPack (10.00.027.00)
4:29 PM
Bentley Systems, Inc.
9/8/2016

Type.... Tc Calcs
Name.... BYPASS TO CUL
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Page 3.03
........................................................................
........................................................................
TIME OF CONCENTRATION CALCULATOR
........................................................................
........................................................................
Segment #1: Tc: TR -55 Sheet
Mannings n .2400
Hydraulic Length 100.00 ft
2yr, 24hr P 3.4400 in
Slope .010000 ft/ft
Avg.Velocity .09 ft/sec
Segment #1 Time: .3027 hrs
------------------------------------------------------------------------
Segment #2: Tc: TR -55 Shallow
Hydraulic Length 1187.00 ft
Slope .018000 ft/ft
Unpaved
Avg.Velocity 2.16 ft/sec
Segment #2 Time: .1523 hrs
------------------------------------------------------------------------
Segment #3: Tc: TR -55 Channel
Flow Area 6.0000 sq.ft
Wetted Perimeter 8.00 ft
Hydraulic Radius .75 ft
Slope .005550 ft/ft
Mannings n .0300
Hydraulic Length 10449.00 ft
Avg.Velocity 3.05 ft/sec
Segment #3 Time: .9503 hrs
------------------------------------------------------------------------
SIN:
Bentley PondPack (10.00.027.00)
Total Tc: 1.4053 hrs
4:29 PM
Bentley Systems, Inc.
9/8/2016

Type.... Tc Calcs
Name.... BYPASS TO CUL
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Page 3.04
------------------------------------------------------------------------
Tc Equations used...
------------------------------------------------------------------------
___= SCS TR -55 Sheet Flow ______________________________________________
Tc = (.007 * ((n * Lf)**0.8)) / ((P**.5) * (Sf**.4))
Where: Tc = Time of concentration, hrs
n = Mannings n
Lf = Flow length, ft
P = 2yr, 24hr Rain depth, inches
Sf = Slope, %
___= SCS TR -55 Shallow Concentrated Flow
Unpaved surface:
V = 16.1345 * (Sf**0.5)
Paved surface:
V = 20.3282 * (Sf**0.5)
Tc = (Lf / V) / (3600sec/hr)
Where: V = Velocity, ft/sec
Sf = Slope, ft/ft
Tc = Time of concentration, hrs
Lf = Flow length, ft
SIN:
Bentley PondPack (10.00.027.00)
4:29 PM
Bentley Systems, Inc.
9/8/2016

Type.... Tc Calcs
Name.... BYPASS TO CUL
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
___= SCS Channel Flow
R = Aq / Wp
V = (1.49 * (R**(2/3)) * (Sf**-0.5)) / n
Tc = (Lf / V) / (3600sec/hr)
Where: R = Hydraulic radius
Aq = Flow area, sq.ft.
Wp = Wetted perimeter, ft
V = Velocity, ft/sec
Sf = Slope, ft/ft
n = Mannings n
Tc = Time of concentration, hrs
Lf = Flow length, ft
Page 3.05
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Tc Calcs
Name.... POA#1-BYPASS
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Page 3.06
........................................................................
........................................................................
TIME OF CONCENTRATION CALCULATOR
........................................................................
........................................................................
Segment #1: Tc: TR -55 Sheet
Mannings n .2400
Hydraulic Length 100.00 ft
2yr, 24hr P 3.4400 in
Slope .010000 ft/ft
Avg.Velocity .09 ft/sec
Segment #1 Time: .3027 hrs
------------------------------------------------------------------------
Segment #2: Tc: TR -55 Shallow
Hydraulic Length 1187.00 ft
Slope .039000 ft/ft
Unpaved
Avg.Velocity 3.19 ft/sec
Segment #2 Time: .1035 hrs
------------------------------------------------------------------------
Segment #3: Tc: TR -55 Channel
Flow Area 6.0000 sq.ft
Wetted Perimeter 8.00 ft
Hydraulic Radius .75 ft
Slope .011000 ft/ft
Mannings n .0300
Hydraulic Length 3819.00 ft
Avg.Velocity 4.30 ft/sec
Segment #3 Time: .2467 hrs
------------------------------------------------------------------------
SIN:
Bentley PondPack (10.00.027.00)
Total Tc: .6529 hrs
4:29 PM
Bentley Systems, Inc.
9/8/2016

Type.... Tc Calcs
Name.... POA#1-BYPASS
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Page 3.07
------------------------------------------------------------------------
Tc Equations used...
------------------------------------------------------------------------
___= SCS TR -55 Sheet Flow ______________________________________________
Tc = (.007 * ((n * Lf)**0.8)) / ((P**.5) * (Sf**.4))
Where: Tc = Time of concentration, hrs
n = Mannings n
Lf = Flow length, ft
P = 2yr, 24hr Rain depth, inches
Sf = Slope, %
___= SCS TR -55 Shallow Concentrated Flow
Unpaved surface:
V = 16.1345 * (Sf**0.5)
Paved surface:
V = 20.3282 * (Sf**0.5)
Tc = (Lf / V) / (3600sec/hr)
Where: V = Velocity, ft/sec
Sf = Slope, ft/ft
Tc = Time of concentration, hrs
Lf = Flow length, ft
SIN:
Bentley PondPack (10.00.027.00)
4:29 PM
Bentley Systems, Inc.
9/8/2016

Type.... Tc Calcs
Name.... POA#1-BYPASS
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
___= SCS Channel Flow
R = Aq / Wp
V = (1.49 * (R**(2/3)) * (Sf**-0.5)) / n
Tc = (Lf / V) / (3600sec/hr)
Where: R = Hydraulic radius
Aq = Flow area, sq.ft.
Wp = Wetted perimeter, ft
V = Velocity, ft/sec
Sf = Slope, ft/ft
n = Mannings n
Tc = Time of concentration, hrs
Lf = Flow length, ft
Page 3.08
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Tc Calcs
Name.... POA#2-BYPASS
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Page 3.09
........................................................................
........................................................................
TIME OF CONCENTRATION CALCULATOR
........................................................................
........................................................................
Segment #1: Tc: TR -55 Sheet
Mannings n .2400
Hydraulic Length 100.00 ft
2yr, 24hr P 3.4400 in
Slope .010000 ft/ft
Avg.Velocity .09 ft/sec
Segment #1 Time: .3027 hrs
------------------------------------------------------------------------
Segment #2: Tc: TR -55 Shallow
Hydraulic Length 1237.00 ft
Slope .040000 ft/ft
Unpaved
Avg.Velocity 3.23 ft/sec
Segment #2 Time: .1065 hrs
------------------------------------------------------------------------
Segment #3: Tc: TR -55 Channel
Flow Area 6.0000 sq.ft
Wetted Perimeter 8.00 ft
Hydraulic Radius .75 ft
Slope .012300 ft/ft
Mannings n .0300
Hydraulic Length 3200.00 ft
Avg.Velocity 4.55 ft/sec
Segment #3 Time: .1955 hrs
------------------------------------------------------------------------
SIN:
Bentley PondPack (10.00.027.00)
Total Tc: .6047 hrs
4:29 PM
Bentley Systems, Inc.
9/8/2016

Type.... Tc Calcs
Name.... POA#2-BYPASS
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Page 3.10
------------------------------------------------------------------------
Tc Equations used...
------------------------------------------------------------------------
___= SCS TR -55 Sheet Flow ______________________________________________
Tc = (.007 * ((n * Lf)**0.8)) / ((P**.5) * (Sf**.4))
Where: Tc = Time of concentration, hrs
n = Mannings n
Lf = Flow length, ft
P = 2yr, 24hr Rain depth, inches
Sf = Slope, %
___= SCS TR -55 Shallow Concentrated Flow
Unpaved surface:
V = 16.1345 * (Sf**0.5)
Paved surface:
V = 20.3282 * (Sf**0.5)
Tc = (Lf / V) / (3600sec/hr)
Where: V = Velocity, ft/sec
Sf = Slope, ft/ft
Tc = Time of concentration, hrs
Lf = Flow length, ft
SIN:
Bentley PondPack (10.00.027.00)
4:29 PM
Bentley Systems, Inc.
9/8/2016

Type.... Tc Calcs
Name.... POA#2-BYPASS
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
___= SCS Channel Flow
R = Aq / Wp
V = (1.49 * (R**(2/3)) * (Sf**-0.5)) / n
Tc = (Lf / V) / (3600sec/hr)
Where: R = Hydraulic radius
Aq = Flow area, sq.ft.
Wp = Wetted perimeter, ft
V = Velocity, ft/sec
Sf = Slope, ft/ft
n = Mannings n
Tc = Time of concentration, hrs
Lf = Flow length, ft
Page 3.11
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Tc Calcs
Name.... POA#4 BYPASS
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Page 3.12
........................................................................
........................................................................
TIME OF CONCENTRATION CALCULATOR
........................................................................
........................................................................
Segment #1: Tc: TR -55 Sheet
Mannings n .2400
Hydraulic Length 100.00 ft
2yr, 24hr P 3.4400 in
Slope .010000 ft/ft
Avg.Velocity .09 ft/sec
Segment #1 Time: .3027 hrs
------------------------------------------------------------------------
Segment #2: Tc: TR -55 Shallow
Hydraulic Length 2153.00 ft
Slope .031000 ft/ft
Unpaved
Avg.Velocity 2.84 ft/sec
Segment #2 Time: .2105 hrs
------------------------------------------------------------------------
Segment #3: Tc: TR -55 Channel
Flow Area 6.0000 sq.ft
Wetted Perimeter 8.00 ft
Hydraulic Radius .75 ft
Slope .016400 ft/ft
Mannings n .0300
Hydraulic Length 611.00 ft
Avg.Velocity 5.25 ft/sec
Segment #3 Time: .0323 hrs
------------------------------------------------------------------------
SIN:
Bentley PondPack (10.00.027.00)
Total Tc: .5455 hrs
4:29 PM
Bentley Systems, Inc.
9/8/2016

Type.... Tc Calcs
Name.... POA#4 BYPASS
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Page 3.13
------------------------------------------------------------------------
Tc Equations used...
------------------------------------------------------------------------
___= SCS TR -55 Sheet Flow ______________________________________________
Tc = (.007 * ((n * Lf)**0.8)) / ((P**.5) * (Sf**.4))
Where: Tc = Time of concentration, hrs
n = Mannings n
Lf = Flow length, ft
P = 2yr, 24hr Rain depth, inches
Sf = Slope, %
___= SCS TR -55 Shallow Concentrated Flow
Unpaved surface:
V = 16.1345 * (Sf**0.5)
Paved surface:
V = 20.3282 * (Sf**0.5)
Tc = (Lf / V) / (3600sec/hr)
Where: V = Velocity, ft/sec
Sf = Slope, ft/ft
Tc = Time of concentration, hrs
Lf = Flow length, ft
SIN:
Bentley PondPack (10.00.027.00)
4:29 PM
Bentley Systems, Inc.
9/8/2016

Type.... Tc Calcs
Name.... POA#4 BYPASS
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
___= SCS Channel Flow
R = Aq / Wp
V = (1.49 * (R**(2/3)) * (Sf**-0.5)) / n
Tc = (Lf / V) / (3600sec/hr)
Where: R = Hydraulic radius
Aq = Flow area, sq.ft.
Wp = Wetted perimeter, ft
V = Velocity, ft/sec
Sf = Slope, ft/ft
n = Mannings n
Tc = Time of concentration, hrs
Lf = Flow length, ft
Page 3.14
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Tc Calcs
Name.... POA#5-BYPASS
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Page 3.15
........................................................................
........................................................................
TIME OF CONCENTRATION CALCULATOR
........................................................................
........................................................................
Segment #1: Tc: User Defined
Segment #1 Time: .0833 hrs
------------------------------------------------------------------------
Total Tc: .0833 hrs
Calculated Tc < Min.Tc:
Use Minimum Tc...
Use Tc = .0833 hrs
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Tc Calcs
Name.... POA#5-BYPASS
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Page 3.16
------------------------------------------------------------------------
Tc Equations used...
------------------------------------------------------------------------
___= User Defined
Tc = Value entered by user
Where: Tc = Time of concentration
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Tc Calcs
Name.... SCM#1
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Page 3.17
........................................................................
........................................................................
TIME OF CONCENTRATION CALCULATOR
........................................................................
........................................................................
Segment #1: Tc: User Defined
Segment #1 Time: .0833 hrs
------------------------------------------------------------------------
Total Tc: .0833 hrs
Calculated Tc < Min.Tc:
Use Minimum Tc...
Use Tc = .0833 hrs
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Tc Calcs
Name.... SCM#1
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Page 3.18
------------------------------------------------------------------------
Tc Equations used...
------------------------------------------------------------------------
==== User Defined
Tc = Value entered by user
Where: Tc = Time of concentration
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Tc Calcs
Name.... SCM#2
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Page 3.19
........................................................................
........................................................................
TIME OF CONCENTRATION CALCULATOR
........................................................................
........................................................................
Segment #1: Tc: User Defined
Segment #1 Time: .0833 hrs
------------------------------------------------------------------------
Total Tc: .0833 hrs
Calculated Tc < Min.Tc:
Use Minimum Tc...
Use Tc = .0833 hrs
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Tc Calcs
Name.... SCM#2
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Page 3.20
------------------------------------------------------------------------
Tc Equations used...
------------------------------------------------------------------------
==== User Defined
Tc = Value entered by user
Where: Tc = Time of concentration
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Tc Calcs
Name.... SCM#3
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Page 3.21
........................................................................
........................................................................
TIME OF CONCENTRATION CALCULATOR
........................................................................
........................................................................
Segment #1: Tc: User Defined
Segment #1 Time: .0833 hrs
------------------------------------------------------------------------
Total Tc: .0833 hrs
Calculated Tc < Min.Tc:
Use Minimum Tc...
Use Tc = .0833 hrs
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Tc Calcs
Name.... SCM#3
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Page 3.22
------------------------------------------------------------------------
Tc Equations used...
------------------------------------------------------------------------
==== User Defined
Tc = Value entered by user
Where: Tc = Time of concentration
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Tc Calcs
Name.... SCM#4
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Page 3.23
........................................................................
........................................................................
TIME OF CONCENTRATION CALCULATOR
........................................................................
........................................................................
Segment #1: Tc: User Defined
Segment #1 Time: .0833 hrs
------------------------------------------------------------------------
Total Tc: .0833 hrs
Calculated Tc < Min.Tc:
Use Minimum Tc...
Use Tc = .0833 hrs
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Tc Calcs
Name.... SCM#4
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Page 3.24
------------------------------------------------------------------------
Tc Equations used...
------------------------------------------------------------------------
==== User Defined
Tc = Value entered by user
Where: Tc = Time of concentration
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Tc Calcs
Name.... SCM#5
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Page 3.25
........................................................................
........................................................................
TIME OF CONCENTRATION CALCULATOR
........................................................................
........................................................................
Segment #1: Tc: User Defined
Segment #1 Time: .0833 hrs
------------------------------------------------------------------------
Total Tc: .0833 hrs
Calculated Tc < Min.Tc:
Use Minimum Tc...
Use Tc = .0833 hrs
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Tc Calcs
Name.... SCM#5
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Page 3.26
------------------------------------------------------------------------
Tc Equations used...
------------------------------------------------------------------------
==== User Defined
Tc = Value entered by user
Where: Tc = Time of concentration
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Runoff CN -Area
Name.... BYPASS TO 10%
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Page 4.01
RUNOFF CURVE NUMBER DATA
..........................................................................
..........................................................................
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016
Impervious
Area
Adjustment
Adjusted
Soil/Surface Description
CN
acres
%C %UC
CN
--------------------------------
OFFSITE -
Open
----
80
---------
33.300
----- -----
------
80.00
OFFSITE -
Water
100
9.800
100.00
OFFSITE -
Ag
78
98.600
78.00
OFFSITE -
Imp
98
4.800
98.00
OFFSITE -
Woods
77
403.000
77.00
COMPOSITE
...........................................................................
...........................................................................
AREA & WEIGHTED CN --->
549.500
77.95 (78)
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Runoff CN -Area
Name.... BYPASS TO CUL
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Page 4.02
RUNOFF CURVE NUMBER DATA
..........................................................................
..........................................................................
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016
Impervious
Area
Adjustment
Adjusted
Soil/Surface Description
CN
acres
%C %UC
CN
--------------------------------
OFFSITE-imp
----
98
---------
52.430
----- -----
------
98.00
OFFSITE -open
80
134.350
80.00
OFFSITE -wooded
77
727.150
77.00
OFFSITE-agri
78
121.850
78.00
COMPOSITE AREA & WEIGHTED CN --->
...........................................................................
...........................................................................
1035.780
78.57 (79)
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Runoff CN -Area
Name.... POA#1-BYPASS
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Page 4.03
RUNOFF CURVE NUMBER DATA
..........................................................................
..........................................................................
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016
Impervious
Area
Adjustment
Adjusted
Soil/Surface Description
CN
acres
%C %UC
CN
--------------------------------
Open-Lots
----
80
---------
7.130
----- -----
65.00
------
91.70
Wooded
77
21.460
16.00
78.68
Water
100
.990
100.00
OFFSITE -imp
98
3.320
98.00
OFFSITE -open
80
6.650
80.00
OFFSITE -wooded
77
56.500
77.00
COMPOSITE AREA & WEIGHTED CN --->
...........................................................................
...........................................................................
96.050
79.64 (80)
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Runoff CN -Area
Name.... POA#2-BYPASS
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Page 4.04
RUNOFF CURVE NUMBER DATA
..........................................................................
..........................................................................
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016
Impervious
Area
Adjustment
Adjusted
Soil/Surface Description
CN
acres
%C %UC
CN
--------------------------------
Open-Lots
----
80
---------
7.700
----- -----
65.00
------
91.70
Wooded
77
15.410
77.00
Water
100
1.080
100.00
OFFSITE -imp
98
1.970
98.00
OFFSITE -open
80
5.130
80.00
OFFSITE -wooded
77
31.480
77.00
COMPOSITE AREA & WEIGHTED CN --->
...........................................................................
...........................................................................
62.770
80.10 (80)
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Runoff CN -Area
Name.... POA#4 BYPASS
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Page 4.05
RUNOFF CURVE NUMBER DATA
..........................................................................
..........................................................................
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016
Impervious
Area
Adjustment
Adjusted
Soil/Surface Description
CN
acres
%C %UC
CN
--------------------------------
Open
----
80
---------
1.810
----- -----
------
80.00
Wooded
77
4.280
77.00
OFFSITE -imp
98
2.610
98.00
OFFSITE -open
80
6.790
80.00
OFFSITE -wooded
77
42.890
77.00
COMPOSITE AREA & WEIGHTED CN --->
...........................................................................
...........................................................................
58.380
78.38 (78)
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Runoff CN -Area
Name.... POA#5-BYPASS
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Page 4.06
RUNOFF CURVE NUMBER DATA
..........................................................................
..........................................................................
Impervious
Area Adjustment Adjusted
Soil/Surface Description CN acres %C %UC CN
-------------------------------- ------------- ----- ----- ------
Wooded 77 3.770 13.00 78.37
COMPOSITE AREA & WEIGHTED CN ---> 3.770 78.37 (78)
...........................................................................
...........................................................................
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Runoff CN -Area
Name.... SCM#1
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Page 4.07
RUNOFF CURVE NUMBER DATA
..........................................................................
..........................................................................
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016
Impervious
Area
Adjustment
Adjusted
Soil/Surface Description
CN
acres
%C %UC
CN
--------------------------------
Open-Lots
----
80
---------
16.920
----- -----
65.00
------
91.70
Open -ROW
80
8.430
75.00
93.50
Open
80
2.680
80.00
OFFSITE -open
80
1.810
20.00
83.60
COMPOSITE AREA & WEIGHTED CN --->
...........................................................................
...........................................................................
29.840
90.67 (91)
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Runoff CN -Area
Name.... SCM#2
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Page 4.08
RUNOFF CURVE NUMBER DATA
..........................................................................
..........................................................................
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016
Impervious
Area
Adjustment
Adjusted
Soil/Surface Description
CN
acres
%C %UC
CN
--------------------------------
Open-Lots
----
80
---------
2.520
----- -----
65.00
------
91.70
Open-Townhomes
80
3.020
90.00
96.20
Open -ROW
80
5.030
75.00
93.50
Open Space
80
3.110
80.00
COMPOSITE AREA & WEIGHTED CN --->
...........................................................................
...........................................................................
13.680
90.70 (91)
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Runoff CN -Area
Name.... SCM#3
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Page 4.09
RUNOFF CURVE NUMBER DATA
..........................................................................
..........................................................................
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016
Impervious
Area
Adjustment
Adjusted
Soil/Surface Description
CN
acres
%C %UC
CN
--------------------------------
Open-Townhomes
----
80
---------
1.300
----- -----
90.00
------
96.20
Open -ROW
80
.950
75.00
93.50
Open
80
1.630
80.00
COMPOSITE AREA & WEIGHTED CN --->
...........................................................................
3.880
88.73 (89)
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Runoff CN -Area
Name.... SCM#4
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Page 4.10
RUNOFF CURVE NUMBER DATA
..........................................................................
..........................................................................
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016
Impervious
Area
Adjustment
Adjusted
Soil/Surface Description
CN
acres
%C %UC
CN
--------------------------------
Open-Lots
----
80
---------
10.270
----- -----
65.00
------
91.70
Open -ROW
80
5.120
75.00
93.50
Open -Amenity
80
2.630
75.00
93.50
Open
80
2.990
80.00
OFFSITE -wooded
77
.880
77.00
COMPOSITE AREA & WEIGHTED CN --->
...........................................................................
...........................................................................
21.890
90.15 (90)
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Runoff CN -Area
Name.... SCM#5
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Page 4.11
RUNOFF CURVE NUMBER DATA
..........................................................................
..........................................................................
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016
Impervious
Area
Adjustment
Adjusted
Soil/Surface Description
CN
acres
%C %UC
CN
--------------------------------
Open-Lots
----
80
---------
13.090
----- -----
65.00
------
91.70
Open -ROW
80
3.700
75.00
93.50
Open
80
2.320
80.00
COMPOSITE AREA & WEIGHTED CN --->
...........................................................................
19.110
90.63 (91)
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Reach Routing Summary Page 5.01
Name.... REACH 10 Tag: 1 Event: 1 yr
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Storm... RDU NOAA lyr Tag: 1
REACH ROUTING SUMMARY
(Hydrograph Translation)
HYG Directory = K:\15\15-0260\150265-Bristol\H-H\
Inflow HYG file -ID = NONE STORED - POST-POA#4 1
Outflow HYG file -ID = NONE STORED - REACH 10 1
Base Flow =
No Infiltration
Translation =
Time Start...
Time Step....
Time End.....
Peak Time....
Peak Flow....
00 cfs
.2200 hrs
Inflow Hydrograph
-----------------
10.3860 hrs
.0010 hrs
19.9990 hrs
12.4370 hrs
46.91 cfs
Inflow/Outflow
--------------------------------
Volumes
Inflow =
4.346
ac
-ft
- Unrouted =
.000
ac
-ft
+ Base Flow =
.000
ac
-ft
- Infiltration =
.000
ac
-ft
Outflow =
----------------
4.346
ac
-ft
Outflow Hydrograph
------------------
10.6060 hrs
.0010 hrs
20.2190 hrs
12.6570 hrs
46.91 cfs
WARNING: Inflow hydrograph truncated on right side.
WARNING: Outflow hydrograph truncated on right side.
SIN:
Bentley PondPack (10.00.027.00)
4:29 PM
Bentley Systems, Inc.
9/8/2016

Type.... Reach Routing Summary Page 5.02
Name.... REACH 10 Tag: 10 Event: 10 yr
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Storm... RDU NOAA 10yr Tag: 10
REACH ROUTING SUMMARY
(Hydrograph Translation)
HYG Directory = K:\15\15-0260\150265-Bristol\H-H\
Inflow HYG file -ID = NONE STORED - POST-POA#4 10
Outflow HYG file -ID = NONE STORED - REACH 10 10
Base Flow =
No Infiltration
Translation =
Time Start...
Time Step....
Time End.....
Peak Time....
Peak Flow....
00 cfs
.2200 hrs
Inflow Hydrograph
-----------------
7.5100 hrs
.0010 hrs
19.9990 hrs
12.3640 hrs
118.59 cfs
Inflow/Outflow
--------------------------------
Volumes
Inflow =
11.883
ac
-ft
- Unrouted =
.000
ac
-ft
+ Base Flow =
.000
ac
-ft
- Infiltration =
.000
ac
-ft
Outflow =
----------------
11.883
ac
-ft
Outflow Hydrograph
------------------
7.7300 hrs
.0010 hrs
20.2190 hrs
12.5840 hrs
118.59 cfs
WARNING: Inflow hydrograph truncated on right side.
WARNING: Outflow hydrograph truncated on right side.
SIN:
Bentley PondPack (10.00.027.00)
4:29 PM
Bentley Systems, Inc.
9/8/2016

Type.... Reach Routing Summary Page 5.03
Name.... REACH 10 Tag: 100 Event: 100 yr
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Storm... RDU NOAA 100yr Tag: 100
REACH ROUTING SUMMARY
(Hydrograph Translation)
HYG Directory = K:\15\15-0260\150265-Bristol\H-H\
Inflow HYG file -ID = NONE STORED - POST-POA#4 100
Outflow HYG file -ID = NONE STORED - REACH 10 100
Base Flow =
No Infiltration
Translation =
Time Start...
Time Step....
Time End.....
Peak Time....
Peak Flow....
00 cfs
.2200 hrs
Inflow Hydrograph
-----------------
5.9660 hrs
.0010 hrs
19.9990 hrs
12.3640 hrs
183.82 cfs
Inflow/Outflow
--------------------------------
Volumes
Inflow =
21.506
ac
-ft
- Unrouted =
.000
ac
-ft
+ Base Flow =
.000
ac
-ft
- Infiltration =
.000
ac
-ft
Outflow =
----------------
21.506
ac
-ft
Outflow Hydrograph
------------------
6.1860 hrs
.0010 hrs
20.2190 hrs
12.5840 hrs
183.82 cfs
WARNING: Inflow hydrograph truncated on right side.
WARNING: Outflow hydrograph truncated on right side.
SIN:
Bentley PondPack (10.00.027.00)
4:29 PM
Bentley Systems, Inc.
9/8/2016

Type.... Reach Routing Summary Page 5.04
Name.... REACH 20 Tag: 1 Event: 1 yr
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Storm... RDU NOAA lyr Tag: 1
REACH ROUTING SUMMARY
(Hydrograph Translation)
HYG Directory = K:\15\15-0260\150265-Bristol\H-H\
Inflow HYG file -ID = NONE STORED - POST-POA#3 1
Outflow HYG file -ID = NONE STORED - REACH 20 1
Base Flow =
No Infiltration
Translation =
Time Start...
Time Step....
Time End.....
Peak Time....
Peak Flow....
00 cfs
.1800 hrs
Inflow Hydrograph
-----------------
6.3310 hrs
.0010 hrs
19.9990 hrs
19.1400 hrs
.43 cfs
Inflow/Outflow
--------------------------------
Volumes
Inflow =
.299
ac
-ft
- Unrouted =
.000
ac
-ft
+ Base Flow =
.000
ac
-ft
- Infiltration =
.000
ac
-ft
Outflow =
----------------
.299
ac
-ft
Outflow Hydrograph
------------------
6.5110 hrs
.0010 hrs
20.1790 hrs
19.3200 hrs
.43 cfs
WARNING: Inflow hydrograph truncated on right side.
WARNING: Outflow hydrograph truncated on right side.
SIN:
Bentley PondPack (10.00.027.00)
4:29 PM
Bentley Systems, Inc.
9/8/2016

Type.... Reach Routing Summary Page 5.05
Name.... REACH 20 Tag: 10 Event: 10 yr
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Storm... RDU NOAA 10yr Tag: 10
REACH ROUTING SUMMARY
(Hydrograph Translation)
HYG Directory = K:\15\15-0260\150265-Bristol\H-H\
Inflow HYG file -ID = NONE STORED - POST-POA#3 10
Outflow HYG file -ID = NONE STORED - REACH 20 10
Base Flow =
No Infiltration
Translation =
Time Start...
Time Step....
Time End.....
Peak Time....
Peak Flow....
00 cfs
.1800 hrs
Inflow Hydrograph
-----------------
3.7130 hrs
.0010 hrs
19.9990 hrs
12.3010 hrs
30.76 cfs
Inflow/Outflow
--------------------------------
Volumes
Inflow =
2.944
ac
-ft
- Unrouted =
.000
ac
-ft
+ Base Flow =
.000
ac
-ft
- Infiltration =
.000
ac
-ft
Outflow =
----------------
2.944
ac
-ft
Outflow Hydrograph
------------------
3.8930 hrs
.0010 hrs
20.1790 hrs
12.4810 hrs
30.76 cfs
WARNING: Inflow hydrograph truncated on right side.
WARNING: Outflow hydrograph truncated on right side.
SIN:
Bentley PondPack (10.00.027.00)
4:29 PM
Bentley Systems, Inc.
9/8/2016

Type.... Reach Routing Summary Page 5.06
Name.... REACH 20 Tag: 100 Event: 100 yr
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Storm... RDU NOAA 100yr Tag: 100
REACH ROUTING SUMMARY
(Hydrograph Translation)
HYG Directory = K:\15\15-0260\150265-Bristol\H-H\
Inflow HYG file -ID = NONE STORED - POST-POA#3 100
Outflow HYG file -ID = NONE STORED - REACH 20 100
Base Flow =
No Infiltration
Translation =
Time Start...
Time Step....
Time End.....
Peak Time....
Peak Flow....
00 cfs
.1800 hrs
Inflow Hydrograph
-----------------
2.6120 hrs
.0010 hrs
19.9990 hrs
12.1730 hrs
96.02 cfs
Inflow/Outflow
--------------------------------
Volumes
Inflow =
6.451
ac
-ft
- Unrouted =
.000
ac
-ft
+ Base Flow =
.000
ac
-ft
- Infiltration =
.000
ac
-ft
Outflow =
----------------
6.451
ac
-ft
Outflow Hydrograph
------------------
2.7920 hrs
.0010 hrs
20.1790 hrs
12.3530 hrs
96.02 cfs
WARNING: Inflow hydrograph truncated on right side.
WARNING: Outflow hydrograph truncated on right side.
SIN:
Bentley PondPack (10.00.027.00)
4:29 PM
Bentley Systems, Inc.
9/8/2016

Type.... Reach Routing Summary Page 5.07
Name.... REACH 30 Tag: 1 Event: 1 yr
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Storm... RDU NOAA lyr Tag: 1
REACH ROUTING SUMMARY
(Hydrograph Translation)
HYG Directory = K:\15\15-0260\150265-Bristol\H-H\
Inflow HYG file -ID = NONE STORED - JUNC 3 1
Outflow HYG file -ID = NONE STORED - REACH 30 1
Base Flow =
No Infiltration
Translation =
Time Start...
Time Step....
Time End.....
Peak Time....
Peak Flow....
00 cfs
.1450 hrs
Inflow Hydrograph
-----------------
7.6660 hrs
.0010 hrs
19.9990 hrs
16.7440 hrs
.09 cfs
Inflow/Outflow
--------------------------------
Volumes
Inflow =
.060
ac
-ft
- Unrouted =
.000
ac
-ft
+ Base Flow =
.000
ac
-ft
- Infiltration =
.000
ac
-ft
Outflow =
----------------
.060
ac
-ft
Outflow Hydrograph
------------------
7.8110 hrs
.0010 hrs
20.1440 hrs
16.8890 hrs
.09 cfs
WARNING: Inflow hydrograph truncated on right side.
WARNING: Outflow hydrograph truncated on right side.
SIN:
Bentley PondPack (10.00.027.00)
4:29 PM
Bentley Systems, Inc.
9/8/2016

Type.... Reach Routing Summary Page 5.08
Name.... REACH 30 Tag: 10 Event: 10 yr
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Storm... RDU NOAA 10yr Tag: 10
REACH ROUTING SUMMARY
(Hydrograph Translation)
HYG Directory = K:\15\15-0260\150265-Bristol\H-H\
Inflow HYG file -ID = NONE STORED - JUNC 3 10
Outflow HYG file -ID = NONE STORED - REACH 30 10
Base Flow =
No Infiltration
Translation =
Time Start...
Time Step....
Time End.....
Peak Time....
Peak Flow....
00 cfs
.1450 hrs
Inflow Hydrograph
-----------------
4.9310 hrs
.0010 hrs
19.9990 hrs
12.5640 hrs
1.83 cfs
Inflow/Outflow
--------------------------------
Volumes
Inflow =
.462
ac
-ft
- Unrouted =
.000
ac
-ft
+ Base Flow =
.000
ac
-ft
- Infiltration =
.000
ac
-ft
Outflow =
----------------
.462
ac
-ft
Outflow Hydrograph
------------------
5.0760 hrs
.0010 hrs
20.1440 hrs
12.7090 hrs
1.83 cfs
WARNING: Inflow hydrograph truncated on right side.
WARNING: Outflow hydrograph truncated on right side.
SIN:
Bentley PondPack (10.00.027.00)
4:29 PM
Bentley Systems, Inc.
9/8/2016

Type.... Reach Routing Summary Page 5.09
Name.... REACH 30 Tag: 100 Event: 100 yr
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Storm... RDU NOAA 100yr Tag: 100
REACH ROUTING SUMMARY
(Hydrograph Translation)
HYG Directory = K:\15\15-0260\150265-Bristol\H-H\
Inflow HYG file -ID = NONE STORED - JUNC 3 100
Outflow HYG file -ID = NONE STORED - REACH 30 100
Base Flow =
No Infiltration
Translation =
Time Start...
Time Step....
Time End.....
Peak Time....
Peak Flow....
00 cfs
.1450 hrs
Inflow Hydrograph
-----------------
3.4610 hrs
.0010 hrs
19.9990 hrs
12.1890 hrs
17.78 cfs
Inflow/Outflow
Volumes
--------------------------------
Inflow =
1.161
ac
-ft
- Unrouted =
.000
ac
-ft
+ Base Flow =
.000
ac
-ft
- Infiltration =
.000
ac
-ft
Outflow =
----------------
1.161
ac
-ft
Outflow Hydrograph
------------------
3.6060 hrs
.0010 hrs
20.1440 hrs
12.3340 hrs
17.78 cfs
WARNING: Inflow hydrograph truncated on right side.
WARNING: Outflow hydrograph truncated on right side.
SIN:
Bentley PondPack (10.00.027.00)
4:29 PM
Bentley Systems, Inc.
9/8/2016

Type.... Reach Routing Summary Page 5.10
Name.... REACH 40 Tag: 1 Event: 1 yr
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Storm... RDU NOAA lyr Tag: 1
REACH ROUTING SUMMARY
(Hydrograph Translation)
HYG Directory = K:\15\15-0260\150265-Bristol\H-H\
Inflow HYG file -ID = NONE STORED - POST-POA#2 1
Outflow HYG file -ID = NONE STORED - REACH 40 1
Base Flow =
No Infiltration
Translation =
Time Start...
Time Step....
Time End.....
Peak Time....
Peak Flow....
00 cfs
.1200 hrs
Inflow Hydrograph
-----------------
6.3290 hrs
.0010 hrs
19.9990 hrs
12.4150 hrs
53.90 cfs
Inflow/Outflow
--------------------------------
Volumes
Inflow =
6.205
ac
-ft
- Unrouted =
.000
ac
-ft
+ Base Flow =
.000
ac
-ft
- Infiltration =
.000
ac
-ft
Outflow =
----------------
6.205
ac
-ft
Outflow Hydrograph
------------------
6.4490 hrs
.0010 hrs
20.1190 hrs
12.5350 hrs
53.90 cfs
WARNING: Inflow hydrograph truncated on right side.
WARNING: Outflow hydrograph truncated on right side.
SIN:
Bentley PondPack (10.00.027.00)
4:29 PM
Bentley Systems, Inc.
9/8/2016

Type.... Reach Routing Summary Page 5.11
Name.... REACH 40 Tag: 10 Event: 10 yr
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Storm... RDU NOAA 10yr Tag: 10
REACH ROUTING SUMMARY
(Hydrograph Translation)
HYG Directory = K:\15\15-0260\150265-Bristol\H-H\
Inflow HYG file -ID = NONE STORED - POST-POA#2 10
Outflow HYG file -ID = NONE STORED - REACH 40 10
Base Flow =
No Infiltration
Translation =
Time Start...
Time Step....
Time End.....
Peak Time....
Peak Flow....
00 cfs
.1200 hrs
Inflow Hydrograph
-----------------
3.7110 hrs
.0010 hrs
19.9990 hrs
12.4140 hrs
170.55 cfs
Inflow/Outflow
--------------------------------
Volumes
Inflow =
19.837
ac
-ft
- Unrouted =
.000
ac
-ft
+ Base Flow =
.000
ac
-ft
- Infiltration =
.000
ac
-ft
Outflow =
----------------
19.837
ac
-ft
Outflow Hydrograph
------------------
3.8310 hrs
.0010 hrs
20.1190 hrs
12.5340 hrs
170.55 cfs
WARNING: Inflow hydrograph truncated on right side.
WARNING: Outflow hydrograph truncated on right side.
SIN:
Bentley PondPack (10.00.027.00)
4:29 PM
Bentley Systems, Inc.
9/8/2016

Type.... Reach Routing Summary Page 5.12
Name.... REACH 40 Tag: 100 Event: 100 yr
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Storm... RDU NOAA 100yr Tag: 100
REACH ROUTING SUMMARY
(Hydrograph Translation)
HYG Directory = K:\15\15-0260\150265-Bristol\H-H\
Inflow HYG file -ID = NONE STORED - POST-POA#2 100
Outflow HYG file -ID = NONE STORED - REACH 40 100
Base Flow =
No Infiltration
Translation =
Time Start...
Time Step....
Time End.....
Peak Time....
Peak Flow....
00 cfs
.1200 hrs
Inflow Hydrograph
-----------------
2.6100 hrs
.0010 hrs
19.9990 hrs
12.2930 hrs
327.07 cfs
Inflow/Outflow
--------------------------------
Volumes
Inflow =
37.532
ac
-ft
- Unrouted =
.000
ac
-ft
+ Base Flow =
.000
ac
-ft
- Infiltration =
.000
ac
-ft
Outflow =
----------------
37.532
ac
-ft
Outflow Hydrograph
------------------
2.7300 hrs
.0010 hrs
20.1190 hrs
12.4130 hrs
327.07 cfs
WARNING: Inflow hydrograph truncated on right side.
WARNING: Outflow hydrograph truncated on right side.
SIN:
Bentley PondPack (10.00.027.00)
4:29 PM
Bentley Systems, Inc.
9/8/2016

Type.... Vol: Elev-Area
Name.... SCM#1
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Page 6.01
Elevation Planimeter
Area
Al+A2+sgr(A1*A2)
Volume
Volume Sum
(ft) (sq.in)
------------------------------------------------------------------------
(sq.ft)
(sq.ft)
(ac -ft)
(ac -ft)
272.50
33193
0
.000
.000
273.00
37107
105396
.403
.403
275.00 -----
42021
118616
1.815
2.219
277.00
47188
133739
2.047
4.265
279.50 -----
54112
151832
2.905
7.170
POND VOLUME EQUATIONS
* Incremental volume computed by the Conic Method for Reservoir Volumes.
Volume = (1/3) * (EL2-EL1) * (Areal + Area2 + sq.rt.(Areal*Areal))
where: EL1, EL2 = Lower and upper elevations of the increment
Areal,Area2 = Areas computed for EL1, EL2, respectively
Volume = Incremental volume between EL1 and EL2
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Vol: Elev-Area
Name.... SCM#2
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Page 6.02
Elevation Planimeter
Area
Al+A2+sgr(A1*A2)
Volume
Volume Sum
(ft) (sq.in)
------------------------------------------------------------------------
(sq.ft)
(sq.ft)
(ac -ft)
(ac -ft)
267.00
14550
0
.000
.000
267.50
17774
48405
.185
.185
270.00 -----
22921
60879
1.165
1.350
273.00 -----
29530
78467
1.801
3.151
POND VOLUME EQUATIONS
* Incremental volume computed by the Conic Method for Reservoir Volumes.
Volume = (1/3) * (EL2-EL1) * (Areal + Area2 + sq.rt.(Areal*Areal))
where: EL1, EL2 = Lower and upper elevations of the increment
Areal,Area2 = Areas computed for EL1, EL2, respectively
Volume = Incremental volume between EL1 and EL2
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Vol: Elev-Area
Name.... SCM#3
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Page 6.03
Elevation Planimeter
Area
Al+A2+sgr(A1*A2)
Volume
Volume Sum
(ft) (sq.in)
------------------------------------------------------------------------
(sq.ft)
(sq.ft)
(ac -ft)
(ac -ft)
301.00
6603
0
.000
.000
302.00 -----
8982
23286
.178
.178
304.00
11476
30611
.468
.647
306.00
14204
38447
.588
1.235
POND VOLUME EQUATIONS
* Incremental volume computed by the Conic Method for Reservoir Volumes.
Volume = (1/3) * (EL2-EL1) * (Areal + Area2 + sq.rt.(Areal*Areal))
where: EL1, EL2 = Lower and upper elevations of the increment
Areal,Area2 = Areas computed for EL1, EL2, respectively
Volume = Incremental volume between EL1 and EL2
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Vol: Elev-Area
Name.... SCM#4
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Page 6.04
Elevation Planimeter
Area
Al+A2+sgr(A1*A2)
Volume
Volume Sum
(ft) (sq.in)
------------------------------------------------------------------------
(sq.ft)
(sq.ft)
(ac -ft)
(ac -ft)
274.50 -----
24122
0
.000
.000
275.00
28422
78728
.301
.301
277.00 -----
32895
91894
1.406
1.708
279.00 -----
37966
106201
1.625
3.333
281.00 -----
43342
121873
1.865
5.198
POND VOLUME EQUATIONS
* Incremental volume computed by the Conic Method for Reservoir Volumes.
Volume = (1/3) * (EL2-EL1) * (Areal + Area2 + sq.rt.(Areal*Areal))
where: EL1, EL2 = Lower and upper elevations of the increment
Areal,Area2 = Areas computed for EL1, EL2, respectively
Volume = Incremental volume between EL1 and EL2
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Vol: Elev-Area
Name.... SCM#5
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
Page 6.05
Elevation Planimeter
Area
Al+A2+sgr(A1*A2)
Volume
Volume Sum
(ft) (sq.in)
------------------------------------------------------------------------
(sq.ft)
(sq.ft)
(ac -ft)
(ac -ft)
280.00
24126
0
.000
.000
280.50 -----
28124
78298
.300
.300
283.00 -----
34345
93548
1.790
2.089
286.00 -----
42400
114906
2.638
4.727
POND VOLUME EQUATIONS
* Incremental volume computed by the Conic Method for Reservoir Volumes.
Volume = (1/3) * (EL2-EL1) * (Areal + Area2 + sq.rt.(Areal*Areal))
where: EL1, EL2 = Lower and upper elevations of the increment
Areal,Area2 = Areas computed for EL1, EL2, respectively
Volume = Incremental volume between EL1 and EL2
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Outlet Input Data
Name.... Outlet 1
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
REQUESTED POND WS ELEVATIONS:
Min. Elev.= 272.50 ft
Increment = .10 ft
Max. Elev.= 279.50 ft
OUTLET CONNECTIVITY
---> Forward Flow Only (UpStream to DnStream)
<--- Reverse Flow Only (DnStream to UpStream)
<---> Forward and Reverse Both Allowed
Page 7.01
Structure No. Outfall E1, ft E2, ft
Inlet Box RO ---> CO 277.000 279.500
Orifice -Circular 00 ---> CO 272.500 279.500
Culvert -Circular CO ---> TW 267.000 279.500
TW SETUP, DS Channel
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Outlet Input Data
Name.... Outlet 1
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
OUTLET STRUCTURE INPUT DATA
Structure ID
= RO
Structure Type
= Inlet Box
------------------------------------
# of Openings
= 1
Invert Elev.
= 277.00 ft
Orifice Area
= 24.0000 sq.ft
Orifice Coeff.
_ .600
Weir Length
= 20.00 ft
Weir Coeff.
= 3.100
K, Reverse
= 1.000
Mannings n
= .0000
Kev,Charged Riser
= .000
Weir Submergence
= No
Structure ID = 00
Structure Type = Orifice -Circular
------------------------------------
# of Openings = 1
Invert Elev. = 272.50 ft
Diameter = .2916 ft
Orifice Coeff. _ .600
Page 7.02
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Outlet Input Data
Name.... Outlet 1
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
OUTLET STRUCTURE INPUT DATA
Structure ID
= CO
Equation form =
Structure Type
= Culvert -Circular
.0098
------------------------------------
No. Barrels
= 1
Inlet Control c =
Barrel Diameter
= 4.0000
ft
Upstream Invert
= 267.00
ft
Dnstream Invert
= 266.00
ft
Horiz. Length
= 50.00
ft
Barrel Length
= 50.01
ft
Barrel Slope
= .02000
ft/ft
OUTLET CONTROL DATA...
Mannings n = .0130
Ke = .5000
Kb = .004925
Kr = .5000
HW Convergence = .001
INLET CONTROL DATA...
TW
Equation form =
1
Inlet Control K =
.0098
Inlet Control M =
2.0000
Inlet Control c =
.03980
Inlet Control Y =
.6700
T1 ratio (HW/D) =
1.150
T2 ratio (HW/D) =
1.297
Slope Factor =
-.500
Page 7.03
(forward entrance loss)
(per ft of full flow)
(reverse entrance loss)
+/- ft
Use unsubmerged inlet control Form 1 equ. below T1 elev.
Use submerged inlet control Form 1 equ. above T2 elev.
In transition zone between unsubmerged and submerged inlet control,
interpolate between flows at T1 & T2...
At T1 Elev = 271.60 ft ---> Flow = 87.96 cfs
At T2 Elev = 272.19 ft ---> Flow = 100.53 cfs
Structure ID = TW
Structure Type = TW SETUP, DS Channel
------------------------------------
FREE OUTFALL CONDITIONS SPECIFIED
CONVERGENCE TOLERANCES...
Maximum Iterations= 40
Min.
TW
tolerance =
.01
ft
Max.
TW
tolerance =
.01
ft
Min.
HW
tolerance =
.01
ft
Max.
HW
tolerance =
.01
ft
Min.
Q
tolerance =
.00
cfs
Max.
Q
tolerance =
.00
cfs
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Composite Rating Curve
Name.... Outlet 1
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
***** COMPOSITE OUTFLOW SUMMARY ****
WS Elev,
Total Q
Notes
----------------
--------
Converge
-------------------------
Elev.
Q
TW Elev Error
ft
cfs
ft +/-ft
Contributing
Structures
272.50
.00
Free
Outfall
(no Q:
RO,OO,CO)
272.60
.02
Free
Outfall
OO,CO
(no
Q:
RO)
272.70
.06
Free
Outfall
OO,CO
(no
Q:
RO)
272.80
.13
Free
Outfall
OO,CO
(no
Q:
RO)
272.90
.16
Free
Outfall
OO,CO
(no
Q:
RO)
273.00
.19
Free
Outfall
OO,CO
(no
Q:
RO)
273.10
.22
Free
Outfall
OO,CO
(no
Q:
RO)
273.20
.24
Free
Outfall
OO,CO
(no
Q:
RO)
273.30
.26
Free
Outfall
OO,CO
(no
Q:
RO)
273.40
.28
Free
Outfall
OO,CO
(no
Q:
RO)
273.50
.30
Free
Outfall
OO,CO
(no
Q:
RO)
273.60
.31
Free
Outfall
OO,CO
(no
Q:
RO)
273.70
.33
Free
Outfall
OO,CO
(no
Q:
RO)
273.80
.35
Free
Outfall
OO,CO
(no
Q:
RO)
273.90
.36
Free
Outfall
OO,CO
(no
Q:
RO)
274.00
.37
Free
Outfall
OO,CO
(no
Q:
RO)
274.10
.39
Free
Outfall
OO,CO
(no
Q:
RO)
274.20
.40
Free
Outfall
OO,CO
(no
Q:
RO)
274.30
.41
Free
Outfall
OO,CO
(no
Q:
RO)
274.40
.42
Free
Outfall
OO,CO
(no
Q:
RO)
274.50
.44
Free
Outfall
OO,CO
(no
Q:
RO)
274.60
.45
Free
Outfall
OO,CO
(no
Q:
RO)
274.70
.46
Free
Outfall
OO,CO
(no
Q:
RO)
274.80
.47
Free
Outfall
OO,CO
(no
Q:
RO)
274.90
.48
Free
Outfall
OO,CO
(no
Q:
RO)
275.00
.49
Free
Outfall
OO,CO
(no
Q:
RO)
275.10
.50
Free
Outfall
OO,CO
(no
Q:
RO)
275.20
.51
Free
Outfall
OO,CO
(no
Q:
RO)
275.30
.52
Free
Outfall
OO,CO
(no
Q:
RO)
275.40
.53
Free
Outfall
OO,CO
(no
Q:
RO)
275.50
.54
Free
Outfall
OO,CO
(no
Q:
RO)
275.60
.55
Free
Outfall
OO,CO
(no
Q:
RO)
275.70
.56
Free
Outfall
OO,CO
(no
Q:
RO)
275.80
.57
Free
Outfall
OO,CO
(no
Q:
RO)
275.90
.58
Free
Outfall
OO,CO
(no
Q:
RO)
276.00
.59
Free
Outfall
OO,CO
(no
Q:
RO)
276.10
.60
Free
Outfall
OO,CO
(no
Q:
RO)
276.20
.60
Free
Outfall
OO,CO
(no
Q:
RO)
Page 7.04
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Composite Rating Curve
Name.... Outlet 1
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
***** COMPOSITE OUTFLOW SUMMARY ****
WS Elev,
Total Q
Notes
----------------
--------
Converge
-------------------------
Elev.
Q
TW Elev Error
ft
cfs
ft +/-ft
Contributing Structures
276.30
.61
Free
Outfall
OO,CO (no
Q: RO)
276.40
.62
Free
Outfall
OO,CO (no
Q: RO)
276.50
.63
Free
Outfall
OO,CO (no
Q: RO)
276.60
.64
Free
Outfall
OO,CO (no
Q: RO)
276.70
.65
Free
Outfall
OO,CO (no
Q: RO)
276.80
.66
Free
Outfall
OO,CO (no
Q: RO)
276.90
.66
Free
Outfall
OO,CO (no
Q: RO)
277.00
.67
Free
Outfall
OO,CO (no
Q: RO)
277.10
2.64
Free
Outfall
RO,OO,CO
277.20
6.23
Free
Outfall
RO,OO,CO
277.30
10.89
Free
Outfall
RO,OO,CO
277.40
16.39
Free
Outfall
RO,OO,CO
277.50
22.63
Free
Outfall
RO,OO,CO
277.60
29.54
Free
Outfall
RO,OO,CO
277.70
37.03
Free
Outfall
RO,OO,CO
277.80
45.11
Free
Outfall
RO,OO,CO
277.90
53.68
Free
Outfall
RO,OO,CO
278.00
62.72
Free
Outfall
RO,OO,CO
278.10
72.27
Free
Outfall
RO,OO,CO
278.20
82.26
Free
Outfall
RO,OO,CO
278.30
92.69
Free
Outfall
RO,OO,CO
278.40
103.47
Free
Outfall
RO,OO,CO
278.50
114.66
Free
Outfall
RO,OO,CO
278.60
126.20
Free
Outfall
RO,OO,CO
278.70
138.09
Free
Outfall
RO,OO,CO
278.80
150.32
Free
Outfall
RO,OO,CO
278.90
159.76
Free
Outfall
RO,OO,CO
279.00
163.88
Free
Outfall
RO,OO,CO
279.10
167.89
Free
Outfall
RO,OO,CO
279.20
171.80
Free
Outfall
RO,OO,CO
279.30
175.62
Free
Outfall
RO,OO,CO
279.40
179.36
Free
Outfall
RO,OO,CO
279.50
183.02
Free
Outfall
RO,OO,CO
Page 7.05
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Outlet Input Data
Name.... Outlet 2
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
REQUESTED POND WS ELEVATIONS:
Min. Elev.= 267.00 ft
Increment = .10 ft
Max. Elev.= 273.00 ft
OUTLET CONNECTIVITY
---> Forward Flow Only (UpStream to DnStream)
<--- Reverse Flow Only (DnStream to UpStream)
<---> Forward and Reverse Both Allowed
Page 7.06
Structure
No.
Outfall
E1, ft
E2, ft
Weir -Rectangular
WO
---> CO
270.000
273.000
Inlet Box
RO
---> CO
270.500
273.000
Orifice -Circular
00
---> CO
267.000
273.000
Culvert -Circular
CO
---> TW
262.000
273.000
TW SETUP, DS Channel
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Outlet Input Data
Name.... Outlet 2
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
OUTLET STRUCTURE INPUT DATA
Structure ID = WO
Structure Type = Weir -Rectangular
------------------------------------
# of Openings = 1
Crest Elev. = 270.00 ft
Weir Length = 2.50 ft
Weir Coeff. = 3.100000
Weir TW effects (Use adjustment equation)
Structure ID
= RO
Structure Type
= Inlet Box
------------------------------------
# of Openings
= 1
Invert Elev.
= 270.50 ft
Orifice Area
= 24.0000 sq.ft
Orifice Coeff.
_ .600
Weir Length
= 20.00 ft
Weir Coeff.
= 3.100
K, Reverse
= 1.000
Mannings n
= .0000
Kev,Charged Riser
= .000
Weir Submergence
= No
Structure ID = 00
Structure Type = Orifice -Circular
------------------------------------
# of Openings = 1
Invert Elev. = 267.00 ft
Diameter = .2083 ft
Orifice Coeff. _ .600
Page 7.07
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Outlet Input Data
Name.... Outlet 2
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
OUTLET STRUCTURE INPUT DATA
Structure ID
= CO
Equation form =
Structure Type
= Culvert -Circular
.0098
------------------------------------
No. Barrels
= 1
Inlet Control c =
Barrel Diameter
= 4.0000
ft
Upstream Invert
= 262.00
ft
Dnstream Invert
= 261.00
ft
Horiz. Length
= 125.00
ft
Barrel Length
= 125.00
ft
Barrel Slope
= .00800
ft/ft
OUTLET CONTROL DATA...
Mannings n = .0130
Ke = .5000
Kb = .004925
Kr = .5000
HW Convergence = .001
INLET CONTROL DATA...
TW
Equation form =
1
Inlet Control K =
.0098
Inlet Control M =
2.0000
Inlet Control c =
.03980
Inlet Control Y =
.6700
T1 ratio (HW/D) =
1.156
T2 ratio (HW/D) =
1.303
Slope Factor =
-.500
Page 7.08
(forward entrance loss)
(per ft of full flow)
(reverse entrance loss)
+/- ft
Use unsubmerged inlet control Form 1 equ. below T1 elev.
Use submerged inlet control Form 1 equ. above T2 elev.
In transition zone between unsubmerged and submerged inlet control,
interpolate between flows at T1 & T2...
At T1 Elev = 266.63 ft ---> Flow = 87.96 cfs
At T2 Elev = 267.21 ft ---> Flow = 100.53 cfs
Structure ID = TW
Structure Type = TW SETUP, DS Channel
------------------------------------
FREE OUTFALL CONDITIONS SPECIFIED
CONVERGENCE TOLERANCES...
Maximum Iterations= 40
Min.
TW
tolerance =
.01
ft
Max.
TW
tolerance =
.01
ft
Min.
HW
tolerance =
.01
ft
Max.
HW
tolerance =
.01
ft
Min.
Q
tolerance =
.00
cfs
Max.
Q
tolerance =
.00
cfs
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Composite Rating Curve
Name.... Outlet 2
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
***** COMPOSITE OUTFLOW SUMMARY ****
WS Elev,
Total Q
Notes
----------------
--------
Converge
-------------------------
Elev.
Q
TW Elev Error
ft
cfs
ft +/-ft
Contributing
Structures
267.00
.00
Free
Outfall
(no Q:
WO,RO,OO,CO)
267.10
.01
Free
Outfall
OO,CO
(no
Q:
WO,RO)
267.20
.05
Free
Outfall
OO,CO
(no
Q:
WO,RO)
267.30
.07
Free
Outfall
OO,CO
(no
Q:
WO,RO)
267.40
.09
Free
Outfall
OO,CO
(no
Q:
WO,RO)
267.50
.10
Free
Outfall
OO,CO
(no
Q:
WO,RO)
267.60
.11
Free
Outfall
OO,CO
(no
Q:
WO,RO)
267.70
.13
Free
Outfall
OO,CO
(no
Q:
WO,RO)
267.80
.14
Free
Outfall
OO,CO
(no
Q:
WO,RO)
267.90
.15
Free
Outfall
OO,CO
(no
Q:
WO,RO)
268.00
.16
Free
Outfall
OO,CO
(no
Q:
WO,RO)
268.10
.16
Free
Outfall
OO,CO
(no
Q:
WO,RO)
268.20
.17
Free
Outfall
OO,CO
(no
Q:
WO,RO)
268.30
.18
Free
Outfall
OO,CO
(no
Q:
WO,RO)
268.40
.19
Free
Outfall
OO,CO
(no
Q:
WO,RO)
268.50
.19
Free
Outfall
OO,CO
(no
Q:
WO,RO)
268.60
.20
Free
Outfall
OO,CO
(no
Q:
WO,RO)
268.70
.21
Free
Outfall
OO,CO
(no
Q:
WO,RO)
268.80
.21
Free
Outfall
OO,CO
(no
Q:
WO,RO)
268.90
.22
Free
Outfall
OO,CO
(no
Q:
WO,RO)
269.00
.22
Free
Outfall
OO,CO
(no
Q:
WO,RO)
269.10
.23
Free
Outfall
OO,CO
(no
Q:
WO,RO)
269.20
.24
Free
Outfall
OO,CO
(no
Q:
WO,RO)
269.30
.24
Free
Outfall
OO,CO
(no
Q:
WO,RO)
269.40
.25
Free
Outfall
OO,CO
(no
Q:
WO,RO)
269.50
.25
Free
Outfall
OO,CO
(no
Q:
WO,RO)
269.60
.26
Free
Outfall
OO,CO
(no
Q:
WO,RO)
269.70
.26
Free
Outfall
OO,CO
(no
Q:
WO,RO)
269.80
.27
Free
Outfall
OO,CO
(no
Q:
WO,RO)
269.90
.27
Free
Outfall
OO,CO
(no
Q:
WO,RO)
270.00
.28
Free
Outfall
OO,CO
(no
Q:
WO,RO)
270.10
.53
Free
Outfall
WO,OO,CO
(no
Q: RO)
270.20
.98
Free
Outfall
WO,OO,CO
(no
Q: RO)
270.30
1.57
Free
Outfall
WO,OO,CO
(no
Q: RO)
270.40
2.26
Free
Outfall
WO,OO,CO
(no
Q: RO)
270.50
3.04
Free
Outfall
WO,OO,CO
(no
Q: RO)
270.60
5.86
Free
Outfall
WO,RO,OO,CO
270.70
10.39
Free
Outfall
WO,RO,OO,CO
Page 7.09
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Composite Rating Curve
Name.... Outlet 2
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
***** COMPOSITE OUTFLOW SUMMARY ****
WS Elev,
Total Q
Notes
----------------
--------
Converge
-------------------------
Elev.
Q
TW Elev Error
ft
cfs
ft +/-ft
Contributing Structures
270.80
16.04
Free
Outfall
WO,RO,OO,CO
270.90
22.61
Free
Outfall
WO,RO,OO,CO
271.00
30.00
Free
Outfall
WO,RO,OO,CO
271.10
38.08
Free
Outfall
WO,RO,OO,CO
271.20
46.82
Free
Outfall
WO,RO,OO,CO
271.30
56.17
Free
Outfall
WO,RO,OO,CO
271.40
66.12
Free
Outfall
WO,RO,OO,CO
271.50
76.57
Free
Outfall
WO,RO,OO,CO
271.60
87.49
Free
Outfall
WO,RO,OO,CO
271.70
98.93
Free
Outfall
WO,RO,OO,CO
271.80
110.94
Free
Outfall
WO,RO,OO,CO
271.90
123.30
Free
Outfall
WO,RO,OO,CO
272.00
136.09
Free
Outfall
WO,RO,OO,CO
272.10
148.89
Free
Outfall
WO,RO,OO,CO
272.20
159.23
Free
Outfall
WO,RO,OO,CO
272.30
167.65
Free
Outfall
WO,RO,OO,CO
272.40
172.60
Free
Outfall
WO,RO,OO,CO
272.50
174.85
Free
Outfall
WO,RO,OO,CO
272.60
176.67
Free
Outfall
WO,RO,OO,CO
272.70
178.18
Free
Outfall
WO,RO,OO,CO
272.80
179.53
Free
Outfall
WO,RO,OO,CO
272.90
180.71
Free
Outfall
WO,RO,OO,CO
273.00
181.87
Free
Outfall
RO,CO (no Q: WO,O0)
Page 7.10
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Outlet Input Data
Name.... Outlet 3
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
REQUESTED POND WS ELEVATIONS:
Min. Elev.= 301.00 ft
Increment = .10 ft
Max. Elev.= 306.00 ft
OUTLET CONNECTIVITY
---> Forward Flow Only (UpStream to DnStream)
<--- Reverse Flow Only (DnStream to UpStream)
<---> Forward and Reverse Both Allowed
Page 7.11
Structure
No.
Outfall
E1, ft
E2, ft
Weir -Rectangular
WO
---> CO
304.000
306.000
Inlet Box
RO
---> CO
304.500
306.000
Orifice -Circular
00
---> CO
301.000
306.000
Culvert -Circular
CO
---> TW
296.000
306.000
TW SETUP, DS Channel
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Outlet Input Data
Name.... Outlet 3
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
OUTLET STRUCTURE INPUT DATA
Structure ID = WO
Structure Type = Weir -Rectangular
------------------------------------
# of Openings = 1
Crest Elev. = 304.00 ft
Weir Length = 2.50 ft
Weir Coeff. = 3.000000
Weir TW effects (Use adjustment equation)
Structure ID
= RO
Structure Type
= Inlet Box
------------------------------------
# of Openings
= 1
Invert Elev.
= 304.50 ft
Orifice Area
= 25.0000 sq.ft
Orifice Coeff.
_ .600
Weir Length
= 20.00 ft
Weir Coeff.
= 3.100
K, Reverse
= 1.000
Mannings n
= .0000
Kev,Charged Riser
= .000
Weir Submergence
= No
Structure ID = 00
Structure Type = Orifice -Circular
------------------------------------
# of Openings = 1
Invert Elev. = 301.00 ft
Diameter = .1250 ft
Orifice Coeff. _ .600
Page 7.12
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Outlet Input Data
Name.... Outlet 3
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
OUTLET STRUCTURE INPUT DATA
Structure ID
= CO
Equation form =
Structure Type
= Culvert -Circular
.0098
------------------------------------
No. Barrels
= 1
Inlet Control c =
Barrel Diameter
= 3.5000
ft
Upstream Invert
= 296.00
ft
Dnstream Invert
= 295.00
ft
Horiz. Length
= 50.00
ft
Barrel Length
= 50.01
ft
Barrel Slope
= .02000
ft/ft
OUTLET CONTROL DATA...
Mannings n = .0130
Ke = .5000
Kb = .005885
Kr = .5000
HW Convergence = .001
INLET CONTROL DATA...
TW
Equation form =
1
Inlet Control K =
.0098
Inlet Control M =
2.0000
Inlet Control c =
.03980
Inlet Control Y =
.6700
T1 ratio (HW/D) =
1.150
T2 ratio (HW/D) =
1.297
Slope Factor =
-.500
Page 7.13
(forward entrance loss)
(per ft of full flow)
(reverse entrance loss)
+/- ft
Use unsubmerged inlet control Form 1 equ. below T1 elev.
Use submerged inlet control Form 1 equ. above T2 elev.
In transition zone between unsubmerged and submerged inlet control,
interpolate between flows at T1 & T2...
At T1 Elev = 300.03 ft ---> Flow = 63.00 cfs
At T2 Elev = 300.54 ft ---> Flow = 72.00 cfs
Structure ID = TW
Structure Type = TW SETUP, DS Channel
------------------------------------
FREE OUTFALL CONDITIONS SPECIFIED
CONVERGENCE TOLERANCES...
Maximum Iterations= 40
Min.
TW
tolerance =
.01
ft
Max.
TW
tolerance =
.01
ft
Min.
HW
tolerance =
.01
ft
Max.
HW
tolerance =
.01
ft
Min.
Q
tolerance =
.00
cfs
Max.
Q
tolerance =
.00
cfs
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Composite Rating Curve
Name.... Outlet 3
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
***** COMPOSITE OUTFLOW SUMMARY ****
WS Elev,
Total Q
Notes
----------------
--------
Converge
-------------------------
Elev.
Q
TW Elev Error
ft
cfs
ft +/-ft
Contributing
Structures
301.00
.00
Free
Outfall
(no Q:
WO,RO,OO,CO)
301.10
.01
Free
Outfall
OO,CO
(no
Q:
WO,RO)
301.20
.02
Free
Outfall
OO,CO
(no
Q:
WO,RO)
301.30
.03
Free
Outfall
OO,CO
(no
Q:
WO,RO)
301.40
.03
Free
Outfall
OO,CO
(no
Q:
WO,RO)
301.50
.04
Free
Outfall
OO,CO
(no
Q:
WO,RO)
301.60
.04
Free
Outfall
OO,CO
(no
Q:
WO,RO)
301.70
.05
Free
Outfall
OO,CO
(no
Q:
WO,RO)
301.80
.05
Free
Outfall
OO,CO
(no
Q:
WO,RO)
301.90
.05
Free
Outfall
OO,CO
(no
Q:
WO,RO)
302.00
.06
Free
Outfall
OO,CO
(no
Q:
WO,RO)
302.10
.06
Free
Outfall
OO,CO
(no
Q:
WO,RO)
302.20
.06
Free
Outfall
OO,CO
(no
Q:
WO,RO)
302.30
.07
Free
Outfall
OO,CO
(no
Q:
WO,RO)
302.40
.07
Free
Outfall
OO,CO
(no
Q:
WO,RO)
302.50
.07
Free
Outfall
OO,CO
(no
Q:
WO,RO)
302.60
.07
Free
Outfall
OO,CO
(no
Q:
WO,RO)
302.70
.08
Free
Outfall
OO,CO
(no
Q:
WO,RO)
302.80
.08
Free
Outfall
OO,CO
(no
Q:
WO,RO)
302.90
.08
Free
Outfall
OO,CO
(no
Q:
WO,RO)
303.00
.08
Free
Outfall
OO,CO
(no
Q:
WO,RO)
303.10
.08
Free
Outfall
OO,CO
(no
Q:
WO,RO)
303.20
.09
Free
Outfall
OO,CO
(no
Q:
WO,RO)
303.30
.09
Free
Outfall
OO,CO
(no
Q:
WO,RO)
303.40
.09
Free
Outfall
OO,CO
(no
Q:
WO,RO)
303.50
.09
Free
Outfall
OO,CO
(no
Q:
WO,RO)
303.60
.09
Free
Outfall
OO,CO
(no
Q:
WO,RO)
303.70
.10
Free
Outfall
OO,CO
(no
Q:
WO,RO)
303.80
.10
Free
Outfall
OO,CO
(no
Q:
WO,RO)
303.90
.10
Free
Outfall
OO,CO
(no
Q:
WO,RO)
304.00
.10
Free
Outfall
OO,CO
(no
Q:
WO,RO)
304.10
.34
Free
Outfall
WO,OO,CO
(no
Q: RO)
304.20
.76
Free
Outfall
WO,OO,CO
(no
Q: RO)
304.30
1.31
Free
Outfall
WO,OO,CO
(no
Q: RO)
304.40
1.94
Free
Outfall
WO,OO,CO
(no
Q: RO)
304.50
2.66
Free
Outfall
WO,OO,CO
(no
Q: RO)
304.60
5.39
Free
Outfall
WO,RO,OO,CO
304.70
9.81
Free
Outfall
WO,RO,OO,CO
Page 7.14
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Composite Rating Curve
Name.... Outlet 3
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
***** COMPOSITE OUTFLOW SUMMARY ****
WS Elev, Total Q
Elev.
Q
ft
cfs
304.80
15.31
304.90
21.74
305.00
28.93
305.10
36.84
305.20
45.35
305.30
54.45
305.40
64.10
305.50
74.25
305.60
84.85
305.70
95.96
305.80
107.49
305.90
118.83
306.00
127.39
Page 7.15
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016
Notes
--------
Converge
-------------------------
TW Elev Error
ft +/-ft
Contributing Structures
Free
Outfall
WO,RO,OO,CO
Free
Outfall
WO,RO,OO,CO
Free
Outfall
WO,RO,OO,CO
Free
Outfall
WO,RO,OO,CO
Free
Outfall
WO,RO,OO,CO
Free
Outfall
WO,RO,OO,CO
Free
Outfall
WO,RO,OO,CO
Free
Outfall
WO,RO,OO,CO
Free
Outfall
WO,RO,OO,CO
Free
Outfall
WO,RO,OO,CO
Free
Outfall
WO,RO,OO,CO
Free
Outfall
WO,RO,OO,CO
Free
Outfall
WO,RO,OO,CO
Page 7.15
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Outlet Input Data
Name.... Outlet 4
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
REQUESTED POND WS ELEVATIONS:
Min. Elev.= 274.50 ft
Increment = .10 ft
Max. Elev.= 281.00 ft
OUTLET CONNECTIVITY
---> Forward Flow Only (UpStream to DnStream)
<--- Reverse Flow Only (DnStream to UpStream)
<---> Forward and Reverse Both Allowed
Page 7.16
Structure
No.
Outfall
E1, ft
E2, ft
Weir -Rectangular
WO
---> CO
279.000
281.000
Inlet Box
RO
---> CO
279.500
281.000
Orifice -Circular
00
---> CO
274.500
281.000
Culvert -Circular
CO
---> TW
269.000
281.000
TW SETUP, DS Channel
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Outlet Input Data
Name.... Outlet 4
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
OUTLET STRUCTURE INPUT DATA
Structure ID = WO
Structure Type = Weir -Rectangular
------------------------------------
# of Openings = 1
Crest Elev. = 279.00 ft
Weir Length = 2.50 ft
Weir Coeff. = 3.100000
Weir TW effects (Use adjustment equation)
Structure ID
= RO
Structure Type
= Inlet Box
------------------------------------
# of Openings
= 1
Invert Elev.
= 279.50 ft
Orifice Area
= 24.0000 sq.ft
Orifice Coeff.
_ .600
Weir Length
= 20.00 ft
Weir Coeff.
= 3.100
K, Reverse
= 1.000
Mannings n
= .0000
Kev,Charged Riser
= .000
Weir Submergence
= No
Structure ID = 00
Structure Type = Orifice -Circular
------------------------------------
# of Openings = 1
Invert Elev. = 274.50 ft
Diameter = .2500 ft
Orifice Coeff. _ .600
Page 7.17
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Outlet Input Data
Name.... Outlet 4
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
OUTLET STRUCTURE INPUT DATA
Structure ID
= CO
Equation form =
Structure Type
= Culvert -Circular
.0098
------------------------------------
No. Barrels
= 1
Inlet Control c =
Barrel Diameter
= 4.0000
ft
Upstream Invert
= 269.00
ft
Dnstream Invert
= 268.00
ft
Horiz. Length
= 50.00
ft
Barrel Length
= 50.01
ft
Barrel Slope
= .02000
ft/ft
OUTLET CONTROL DATA...
Mannings n = .0130
Ke = .5000
Kb = .004925
Kr = .5000
HW Convergence = .001
INLET CONTROL DATA...
TW
Equation form =
1
Inlet Control K =
.0098
Inlet Control M =
2.0000
Inlet Control c =
.03980
Inlet Control Y =
.6700
T1 ratio (HW/D) =
1.150
T2 ratio (HW/D) =
1.297
Slope Factor =
-.500
Page 7.18
(forward entrance loss)
(per ft of full flow)
(reverse entrance loss)
+/- ft
Use unsubmerged inlet control Form 1 equ. below T1 elev.
Use submerged inlet control Form 1 equ. above T2 elev.
In transition zone between unsubmerged and submerged inlet control,
interpolate between flows at T1 & T2...
At T1 Elev = 273.60 ft ---> Flow = 87.96 cfs
At T2 Elev = 274.19 ft ---> Flow = 100.53 cfs
Structure ID = TW
Structure Type = TW SETUP, DS Channel
------------------------------------
FREE OUTFALL CONDITIONS SPECIFIED
CONVERGENCE TOLERANCES...
Maximum Iterations= 40
Min.
TW
tolerance =
.01
ft
Max.
TW
tolerance =
.01
ft
Min.
HW
tolerance =
.01
ft
Max.
HW
tolerance =
.01
ft
Min.
Q
tolerance =
.00
cfs
Max.
Q
tolerance =
.00
cfs
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Composite Rating Curve
Name.... Outlet 4
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
***** COMPOSITE OUTFLOW SUMMARY ****
WS Elev,
Total Q
Notes
----------------
--------
Converge
-------------------------
Elev.
Q
TW Elev Error
ft
cfs
ft +/-ft
Contributing
Structures
274.50
.00
Free
Outfall
(no Q:
WO,RO,OO,CO)
274.60
.01
Free
Outfall
OO,CO
(no
Q:
WO,RO)
274.70
.06
Free
Outfall
OO,CO
(no
Q:
WO,RO)
274.80
.10
Free
Outfall
OO,CO
(no
Q:
WO,RO)
274.90
.12
Free
Outfall
OO,CO
(no
Q:
WO,RO)
275.00
.14
Free
Outfall
OO,CO
(no
Q:
WO,RO)
275.10
.16
Free
Outfall
OO,CO
(no
Q:
WO,RO)
275.20
.18
Free
Outfall
OO,CO
(no
Q:
WO,RO)
275.30
.19
Free
Outfall
OO,CO
(no
Q:
WO,RO)
275.40
.21
Free
Outfall
OO,CO
(no
Q:
WO,RO)
275.50
.22
Free
Outfall
OO,CO
(no
Q:
WO,RO)
275.60
.23
Free
Outfall
OO,CO
(no
Q:
WO,RO)
275.70
.24
Free
Outfall
OO,CO
(no
Q:
WO,RO)
275.80
.25
Free
Outfall
OO,CO
(no
Q:
WO,RO)
275.90
.26
Free
Outfall
OO,CO
(no
Q:
WO,RO)
276.00
.28
Free
Outfall
OO,CO
(no
Q:
WO,RO)
276.10
.29
Free
Outfall
OO,CO
(no
Q:
WO,RO)
276.20
.30
Free
Outfall
OO,CO
(no
Q:
WO,RO)
276.30
.31
Free
Outfall
OO,CO
(no
Q:
WO,RO)
276.40
.31
Free
Outfall
OO,CO
(no
Q:
WO,RO)
276.50
.32
Free
Outfall
OO,CO
(no
Q:
WO,RO)
276.60
.33
Free
Outfall
OO,CO
(no
Q:
WO,RO)
276.70
.34
Free
Outfall
OO,CO
(no
Q:
WO,RO)
276.80
.35
Free
Outfall
OO,CO
(no
Q:
WO,RO)
276.90
.36
Free
Outfall
OO,CO
(no
Q:
WO,RO)
277.00
.36
Free
Outfall
OO,CO
(no
Q:
WO,RO)
277.10
.37
Free
Outfall
OO,CO
(no
Q:
WO,RO)
277.20
.38
Free
Outfall
OO,CO
(no
Q:
WO,RO)
277.30
.39
Free
Outfall
OO,CO
(no
Q:
WO,RO)
277.40
.39
Free
Outfall
OO,CO
(no
Q:
WO,RO)
277.50
.40
Free
Outfall
OO,CO
(no
Q:
WO,RO)
277.60
.41
Free
Outfall
OO,CO
(no
Q:
WO,RO)
277.70
.41
Free
Outfall
OO,CO
(no
Q:
WO,RO)
277.80
.42
Free
Outfall
OO,CO
(no
Q:
WO,RO)
277.90
.43
Free
Outfall
OO,CO
(no
Q:
WO,RO)
278.00
.43
Free
Outfall
OO,CO
(no
Q:
WO,RO)
278.10
.44
Free
Outfall
OO,CO
(no
Q:
WO,RO)
278.20
.45
Free
Outfall
OO,CO
(no
Q:
WO,RO)
Page 7.19
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Composite Rating Curve
Name.... Outlet 4
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
***** COMPOSITE OUTFLOW SUMMARY ****
WS Elev,
Total Q
Notes
----------------
--------
Converge
-------------------------
Elev.
Q
TW Elev Error
ft
cfs
ft +/-ft
Contributing
Structures
278.30
.45
Free
Outfall
OO,CO (no Q:
WO,RO)
278.40
.46
Free
Outfall
OO,CO (no Q:
WO,RO)
278.50
.46
Free
Outfall
OO,CO (no Q:
WO,RO)
278.60
.47
Free
Outfall
OO,CO (no Q:
WO,RO)
278.70
.48
Free
Outfall
OO,CO (no Q:
WO,RO)
278.80
.48
Free
Outfall
OO,CO (no Q:
WO,RO)
278.90
.49
Free
Outfall
OO,CO (no Q:
WO,RO)
279.00
.49
Free
Outfall
OO,CO (no Q:
WO,RO)
279.10
.74
Free
Outfall
WO,OO,CO (no
Q: RO)
279.20
1.19
Free
Outfall
WO,OO,CO (no
Q: RO)
279.30
1.75
Free
Outfall
WO,OO,CO (no
Q: RO)
279.40
2.41
Free
Outfall
WO,OO,CO (no
Q: RO)
279.50
3.15
Free
Outfall
WO,OO,CO (no
Q: RO)
279.60
5.91
Free
Outfall
WO,RO,OO,CO
279.70
10.36
Free
Outfall
WO,RO,OO,CO
279.80
15.90
Free
Outfall
WO,RO,OO,CO
279.90
22.37
Free
Outfall
WO,RO,OO,CO
280.00
29.59
Free
Outfall
WO,RO,OO,CO
280.10
37.51
Free
Outfall
WO,RO,OO,C0
280.20
46.07
Free
Outfall
WO,RO,OO,CO
280.30
55.22
Free
Outfall
WO,RO,OO,CO
280.40
64.90
Free
Outfall
WO,RO,OO,CO
280.50
75.10
Free
Outfall
WO,RO,OO,CO
280.60
85.77
Free
Outfall
WO,RO,OO,CO
280.70
96.91
Free
Outfall
WO,RO,OO,CO
280.80
108.50
Free
Outfall
WO,RO,OO,CO
280.90
120.47
Free
Outfall
WO,RO,OO,CO
281.00
132.84
Free
Outfall
WO,RO,OO,CO
Page 7.20
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Outlet Input Data
Name.... Outlet 5
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
REQUESTED POND WS ELEVATIONS:
Min. Elev.= 280.00 ft
Increment = .10 ft
Max. Elev.= 286.00 ft
OUTLET CONNECTIVITY
---> Forward Flow Only (UpStream to DnStream)
<--- Reverse Flow Only (DnStream to UpStream)
<---> Forward and Reverse Both Allowed
Page 7.21
Structure No. Outfall E1, ft E2, ft
Inlet Box RO ---> CO 284.000 286.000
Orifice -Circular 00 ---> CO 280.000 286.000
Culvert -Circular CO ---> TW 275.000 286.000
TW SETUP, DS Channel
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Outlet Input Data
Name.... Outlet 5
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
OUTLET STRUCTURE INPUT DATA
Structure ID
= RO
Structure Type
= Inlet Box
------------------------------------
# of Openings
= 1
Invert Elev.
= 284.00 ft
Orifice Area
= 25.0000 sq.ft
Orifice Coeff.
_ .600
Weir Length
= 20.00 ft
Weir Coeff.
= 3.100
K, Reverse
= 1.000
Mannings n
= .0000
Kev,Charged Riser
= .000
Weir Submergence
= No
Structure ID = 00
Structure Type = Orifice -Circular
------------------------------------
# of Openings = 1
Invert Elev. = 280.00 ft
Diameter = .2500 ft
Orifice Coeff. _ .600
Page 7.22
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Outlet Input Data
Name.... Outlet 5
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
OUTLET STRUCTURE INPUT DATA
Structure ID
= CO
Equation form =
Structure Type
= Culvert -Circular
.0098
------------------------------------
No. Barrels
= 1
Inlet Control c =
Barrel Diameter
= 3.5000
ft
Upstream Invert
= 275.00
ft
Dnstream Invert
= 274.00
ft
Horiz. Length
= 50.00
ft
Barrel Length
= 50.01
ft
Barrel Slope
= .02000
ft/ft
OUTLET CONTROL DATA...
Mannings n = .0130
Ke = .5000
Kb = .005885
Kr = .5000
HW Convergence = .001
INLET CONTROL DATA...
TW
Equation form =
1
Inlet Control K =
.0098
Inlet Control M =
2.0000
Inlet Control c =
.03980
Inlet Control Y =
.6700
T1 ratio (HW/D) =
1.150
T2 ratio (HW/D) =
1.297
Slope Factor =
-.500
Page 7.23
(forward entrance loss)
(per ft of full flow)
(reverse entrance loss)
+/- ft
Use unsubmerged inlet control Form 1 equ. below T1 elev.
Use submerged inlet control Form 1 equ. above T2 elev.
In transition zone between unsubmerged and submerged inlet control,
interpolate between flows at T1 & T2...
At T1 Elev = 279.03 ft ---> Flow = 63.00 cfs
At T2 Elev = 279.54 ft ---> Flow = 72.00 cfs
Structure ID = TW
Structure Type = TW SETUP, DS Channel
------------------------------------
FREE OUTFALL CONDITIONS SPECIFIED
CONVERGENCE TOLERANCES...
Maximum Iterations= 40
Min.
TW
tolerance =
.01
ft
Max.
TW
tolerance =
.01
ft
Min.
HW
tolerance =
.01
ft
Max.
HW
tolerance =
.01
ft
Min.
Q
tolerance =
.00
cfs
Max.
Q
tolerance =
.00
cfs
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Composite Rating Curve
Name.... Outlet 5
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
***** COMPOSITE OUTFLOW SUMMARY ****
WS Elev,
Total Q
Notes
----------------
--------
Converge
-------------------------
Elev.
Q
TW Elev Error
ft
cfs
ft +/-ft
Contributing
Structures
280.00
.00
Free
Outfall
(no Q:
RO,OO,CO)
280.10
.02
Free
Outfall
OO,CO
(no
Q:
RO)
280.20
.06
Free
Outfall
OO,CO
(no
Q:
RO)
280.30
.10
Free
Outfall
OO,CO
(no
Q:
RO)
280.40
.12
Free
Outfall
OO,CO
(no
Q:
RO)
280.50
.14
Free
Outfall
OO,CO
(no
Q:
RO)
280.60
.16
Free
Outfall
OO,CO
(no
Q:
RO)
280.70
.18
Free
Outfall
OO,CO
(no
Q:
RO)
280.80
.19
Free
Outfall
OO,CO
(no
Q:
RO)
280.90
.21
Free
Outfall
OO,CO
(no
Q:
RO)
281.00
.22
Free
Outfall
OO,CO
(no
Q:
RO)
281.10
.23
Free
Outfall
OO,CO
(no
Q:
RO)
281.20
.24
Free
Outfall
OO,CO
(no
Q:
RO)
281.30
.26
Free
Outfall
OO,CO
(no
Q:
RO)
281.40
.27
Free
Outfall
OO,CO
(no
Q:
RO)
281.50
.28
Free
Outfall
OO,CO
(no
Q:
RO)
281.60
.29
Free
Outfall
OO,CO
(no
Q:
RO)
281.70
.30
Free
Outfall
OO,CO
(no
Q:
RO)
281.80
.30
Free
Outfall
OO,CO
(no
Q:
RO)
281.90
.32
Free
Outfall
OO,CO
(no
Q:
RO)
282.00
.32
Free
Outfall
OO,CO
(no
Q:
RO)
282.10
.33
Free
Outfall
OO,CO
(no
Q:
RO)
282.20
.34
Free
Outfall
OO,CO
(no
Q:
RO)
282.30
.35
Free
Outfall
OO,CO
(no
Q:
RO)
282.40
.36
Free
Outfall
OO,CO
(no
Q:
RO)
282.50
.37
Free
Outfall
OO,CO
(no
Q:
RO)
282.60
.37
Free
Outfall
OO,CO
(no
Q:
RO)
282.70
.38
Free
Outfall
OO,CO
(no
Q:
RO)
282.80
.39
Free
Outfall
OO,CO
(no
Q:
RO)
282.90
.39
Free
Outfall
OO,CO
(no
Q:
RO)
283.00
.40
Free
Outfall
OO,CO
(no
Q:
RO)
283.10
.41
Free
Outfall
OO,CO
(no
Q:
RO)
283.20
.41
Free
Outfall
OO,CO
(no
Q:
RO)
283.30
.42
Free
Outfall
OO,CO
(no
Q:
RO)
283.40
.43
Free
Outfall
OO,CO
(no
Q:
RO)
283.50
.43
Free
Outfall
OO,CO
(no
Q:
RO)
283.60
.44
Free
Outfall
OO,CO
(no
Q:
RO)
283.70
.45
Free
Outfall
OO,CO
(no
Q:
RO)
Page 7.24
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Type.... Composite Rating Curve
Name.... Outlet 5
File.... K:\15\15-0260\150265-Bristol\H-H\2150265-Post.ppw
***** COMPOSITE OUTFLOW SUMMARY ****
WS Elev,
Total Q
Notes
----------------
--------
Converge
-------------------------
Elev.
Q
TW Elev Error
ft
cfs
ft +/-ft
Contributing Structures
283.80
.45
Free
Outfall
OO,CO (no
Q: RO)
283.90
.46
Free
Outfall
OO,CO (no
Q: RO)
284.00
.47
Free
Outfall
OO,CO (no
Q: RO)
284.10
2.43
Free
Outfall
RO,OO,CO
284.20
6.02
Free
Outfall
RO,OO,CO
284.30
10.68
Free
Outfall
RO,OO,CO
284.40
16.17
Free
Outfall
RO,OO,CO
284.50
22.42
Free
Outfall
RO,OO,CO
284.60
29.32
Free
Outfall
RO,OO,CO
284.70
36.80
Free
Outfall
RO,OO,CO
284.80
44.87
Free
Outfall
RO,OO,CO
284.90
53.45
Free
Outfall
RO,OO,CO
285.00
62.53
Free
Outfall
RO,OO,CO
285.10
72.05
Free
Outfall
RO,OO,CO
285.20
81.97
Free
Outfall
RO,OO,CO
285.30
92.34
Free
Outfall
RO,OO,CO
285.40
103.14
Free
Outfall
RO,OO,CO
285.50
114.28
Free
Outfall
RO,OO,CO
285.60
125.77
Free
Outfall
RO,OO,CO
285.70
137.54
Free
Outfall
RO,OO,CO
285.80
140.52
Free
Outfall
RO,CO (no
Q: 00)
285.90
141.35
Free
Outfall
RO,OO,CO
286.00
142.17
Free
Outfall
RO,CO (no
Q: 00)
Page 7.25
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016

Appendix A
Index of Starting Page Numbers for ID Names
----- B -----
BYPASS TO 10%... 3.01, 4.01
BYPASS TO CUL... 3.03, 4.02
-----
0 -----
-----
Outlet
1...
7.01,
7.04
Outlet
2...
7.06,
7.09
Outlet
3...
7.11,
7.14
Outlet
4...
7.16,
7.19
Outlet
5...
7.21,
7.24
-----
P -----
-----
POA#1-BYPASS...
3.17,
3.06,
4.03
POA#2-BYPASS...
2.01
3.09,
4.04
POA#4
BYPASS...
3.12,
4.05
POA#5-BYPASS...
20
3.15,
4.06
-----
R
-----
SCM#-...
3.17,
RDU 24
Hour
Desi...
2.01
4.08,
REACH
10
1... 5.01,
5.02,
5.03
REACH
20
1... 5.04,
5.05,
5.06
REACH
30
1... 5.07,
5.08,
5.09
REACH
40
1... 5.10,
5.11,
5.12
----- S
-----
SCM#-...
3.17,
4.07,
6.01
SCM#2...
3.19,
4.08,
6.02
SCM#3...
3.21,
4.09,
6.03
SCM#4...
3.23,
4.10,
6.04
SCM#5...
3.25,
4.11,
6.05
----- W -----
Watershed... 1.01
A-1
SIN: Bentley Systems, Inc.
Bentley PondPack (10.00.027.00) 4:29 PM 9/8/2016