SW3191104_2020.02.14-TLE Waxhaw Calcs (DS Analysis)_2/14/2020

Stormwater and Erosion Control Measures Calculations
For
The Learning Experience
Waxhaw, NC
Date: October 22, 2019
REV: February 14, 2020
CES Project #7292
`PCNo 00000004 %
=O °PoFES sio °°°°v
° °
L 8
8 041342 8
°ov%2` ly- '02-0
00
CSN�°O%% 1 NEAP°°° el-
9 °°°°°°°o )' '
NM CO�
l/III11W\\
Prepared By: CES Group Engineers, LLP
274 N Highway 16, Suite 300
Denver, NC 28037
704.489.1500
ENGINEERS SURVEYORS SCIENTISTS

The Learning Experience - Waxhaw
SWM Narrative
The proposed project includes construction of a Day Care Facility with associated parking lot, drives,
sidewalks and underground sand filter.
The existing contributing drainage area to the proposed underground sand filter consists of open grassed
areas and woods. The pre -development drainage area is 0.22 acres. The drainage area has HSG B and D
soils which results in a CN value of 77. The pre -development time of concentration was calculated to be
18 minutes (see attached Tc calculations).
The proposed contributing drainage area to the proposed underground sand filter consists of grass open
space, proposed buildings, sidewalks, parking lots, drives synthetic turf and dumpster pad. For purposes
of this analysis the drainage area was divided into impervious and open space areas. The post -
development drainage area is 1.01 acres. The drainage area has HSG B and D soils which results in a
weighted CN value of 91. The post -development impervious percentage for the drainage area is 85%. The
post -development time of concentration was assumed to be 5 minutes.
The proposed underground sand filter was modeled in HydroCAD. The sand filter will provide water
quality treatment of the first 1.0" of rainfall over the entire contributing drainage area based on the
maximum buildout of the site. The sand filter will also safely pass the peak flows from the 2-yr and 10-yr,
24-hour storm events.
The sand filter will have a control chamber with a bypass weir for storm events larger than 1.0". The
proposed sand filter is designed to provide enough storage volume for 75 of the required water quality
volume for the drainage area. The sand filter will have a 6" perforated PVC underdrain at the bottom of a
1.5' deep sand layer. The sand filter as proposed is consist of 6 Oldcastle Precast Storm Capture units, 3
units for the sediment chamber and 3 units for the filter chamber. The sand filter will discharge in the
northeast corner of the site onto an appropriately sized Class B riprap apron before water leaves the site
and flows onto the adjacent HOA parcel. There is an existing drainage feature on the adjacent parcel.

THE LEARNING EXPERIENCE
DRAINAGE AREA MAPS
\� ���-- �/ � j// l� �)I� I � � I I(" J� j/j/j �\\`\\� \\`\\ \`\♦\_ J� 1 \ \ ' \\\ \�' � �---�� / / �'l 1 i li I i i I�,1 ��/// /
\\\ \\ <
\ \ I 1 \ \ \ / /(/ \ \ \ \ —� \ \ \ \\ \ SHEET FLOW
SHCCT FLOW I / J 1 I \ \ \ / i \ 100 LF 1 ( \ I
\ \ \ \\\ \\ \ Tc=14100 LF5MIN 1 I / / / \ \\ \\ \ \ \ \ \ \ \ (IlfllI IIII \ \ \ \ \\\ \\\ \ Tc=14.5 MIN
\\\
/ _--�,
SHALLOW CONCENTRATED FI O N SHALLOW CONCENTRATED FI OW \ \ \\ \ \ \ \ \ \ \ \ \ \ \ \ I I \ I I ) 1 \
\ \\\ \\ \ \ \ 1 f \\ 29MIN
22 LF
/ Tc=0.9 MINI _ \ \ \ \ 1 \ \ \ \ \ J I I / To=0.9 MIN
(l,�i �/\v1 // HaWK9T oR./(l,�i
/ HalA5K5 PNE DR ' \ p
OPE 122 FCHANNCL FLOW / / / / — \ \ ` — J I I \ \ \ \\ 1 FCHANNCL FLOW
Tc-02MIN /j _\ \ / — — — — I / / / / �\ �� _ ' / \ \ \ Tc-02MIN
Ul
OPEN CHANNEL FLOW / — — ,�INa.; „„, ,, a m / C.7 AC / I I / / / OPEN CHAVNEL LOW \ / _ �.•ar / 0.. AC
.1 LF \ \ \ —_� / ..�lu_=� \ / \ TOTAI ❑A� / ) / \\ 61 LF \ \ \ —J .aH, = yrJi ;/ \ -
_ 22.4 AC _ =on* z TCITAI DA - 224 AC
I� To - 1.1 MIN _ / / / ♦ \ \ I ` To- 1.1 MIN / ' / - � ♦ \ \
\\ \\\ \ /SII�ARFA - \\ \\ \\\\\\ ` \ /�fARFA3
\ \ \ \ \\ \ suBA'1EA2 \ \ x \ \ \ \ \ \ \ \\ \ \ \ \ 5.4 AC n \ \ \ \
\ \ \ \ a.s ac \ \ SU�Ai EFC2
TOTAL PRF-D FV Tc TO TOTAL PRE-DFV TC TO
11.6 AC TOTAL DA =,21.7 AC � \ \ \ \ \ \ \ 11.1 AC TpTf1L D�=�1.7 AC
\ \ \\ \ \ TOI ALUA=18.1 An \\ \ // KHAN/STONt DR CULVERT \ \ \\ \ \ TOI AL DA=16.7 Al \\ \ // � � _ HAWSTOIN DR CULVERT
Tr.=79 MIN _ \ \ \ \ � � Tr.=?9 MIN
\ 70NE DR / / / ,y/ / / r \ \ \ \ \ \ HAWK'TONE OR
\ \ HVWK� SHALLOW CONC TRAILD FLOW / / / / d i ' OPENCHANNEL FLp1;Y / / — \\ \ \ \ \ \ SH4LLON/ CONCCNTRAI ED FLOW j / / OPtN OHANN EL
66B L423 LF
/ F / / \ \ \ 1
\ \ ' / - \ \ , u ' / 423 LF
� Tc=3.1 W4ToIN �i� Ic=B MIN y l \ \ \\\ � � c=3.3.1 MIN Ic=u.A MIN
/ SHEET FLOW / / '--'' \ \ \ \ \ \\
/ ( ��� ��-" __ y 1 ~ SH4LLON/ CONCENTRAI tD FLUVJ SHEET FLOW / \
1CO LF / / /_, l' \ — ���- _ - r. / _ 4EJ LF \ \ \\ 100 Lt- y' \ — .; _ _ - / // / — _ �- 59(� LFDW CONCCNTRA tl] FLOW \ \ \\
_ I ��ff�"»- - - -- Tc=1.6MIN I — — - - -- - Tc='.6 PALV
Ic=25.2 MIV _}-- 2 \ I I 1 \ Ic=25.2 MIN I I 1 \
\—OUTFALLFROM
SUBAREA1 L ��� �r -'�' / \ I I 1 I / �� I \ SUHAREAI LL — -
l J SAND FILTER t 1
/ 6.3 AC \ �� -- '' y SHCCT FLOW I / fi.2 AC \ - i SHEET FLOW I
I TOTAI DA-6.3AC d \��/__�' - -r /� '9— fit LF / / / 1 I Tl7TAl DA-6.2 AC p \\ '_ 52 LF /
/ I \ PROJECI SIIE - _- Tc-8./MIN / L / / I \ ` CC` -PROJECT I = -
s -
is- "- -- - — - _ - -
/ a., MI /
ES I T
/)I1r/�`�j,I/I\yl1y♦\` \yQ . {' 1I�'�J\GJI \ay 4 ,I/
T� " \' _ / i 11
— a�t1�_
/ ♦ ♦ '1 I
1 I I 1 \ ,IIII 1 I'/ /
� --
�� -_—1
♦ � __-�. _ � l ♦` ♦ '1 I
1 1 1 1 1 11 i 111 l 11 / '
/llllllll
PRE DEVELOPMENT
1 "=200'
POST DEVELOPMENT
1 "=200'

THE LEARNING EXPERIENCE
DRAINAGE AREA MAPS
SHEETFLOW �F SHCCT FLOW
130 LF i� Y OG LF .
Tc=14.5 MIN � y Tc=14.5 MIN I
SHALLOW CONCENTRATED FI OW I / SHALLOW CONCENTRATED FI OW i
228 LF
22t� LF
Tc=0.9 MIN i / Tc=0.9 MI14
N
i -
HAWKSTONE DR � -�
... OPEN CHANNEL FLOW OPEN CHANNEL FLOW
122 LF - -./ 122 LF
Tc=0.2 MIN - _ Tc=0.2MIN
SUBAREA' - � s SUBAREA
OPEN CHANNEL FLOW
C.7 AC OPEN CHANNEL LOW yam.. �.•ar 3 7 AC
67 i LF Fur; TOTAI ❑4 - 22.4 AC _ G7j LF ��' - ' "" `���i: ` TOTAI DA - 22.4 AC
_ To - 1.1 MIN g _ - To- 1.1 MIN
n'- SIIBARFA3 '7 SII6ARFA3
.� .j 14 4C = a.s ac = 11.1 AC ( TOTAL DA = 21.7 AC TOTAL PRE-❑FV To TO
11.6 AC I TOTAL D/\=21.7 AC TOTALONE DR Tc TO a �. HAWSTONE DR CULVERT
TOl AL UA=18.1 AC: T'. STONE DR CULVERT TOTAL UA=1B.7 AO
Tr.=79 MIN - Tr.=?9MIN
o el z
m w�. \ . m
ONE OR .LW,� ..... L�:' \ O - %
tr SHALLOW CONC TRaILD FLOW • '�` OPEN CHANNEL FLO'.% r :'�W'x' SHALLON/ CONCCNTRAI EU FLUW 4: OPEN CHANNEL FLOW \
_ 66B LF 423 LF \ _ t'68 LF 423 LF
Tc=3.1 MIN Ic=O.BMIN 1 Tc=3.1 MIN -� Ic=U.HMIN -
SHEET FLO!N SHEET FLUVJ - -
SHALLON/CONCCNTRAI6U FLOW SHALLOW CONCCNTRAI ED FLO
1CO LF - I 4EJ LF 1G3 LL W
_ — — 199 LF
Ic=25.2 MIEN SSS Ic=25.2 MIN - -
r3 - Tc=1.6 MIN _ Tc='.6 MIN
OUTPALL FROM
�� !. SUBAREA s — C �/ x sUHAREA LL — SAND FILTER, -T
w 6.3 AC - i,. SHCCT FLOW fi.2 AC - SHEET FLOW
T TAI - 6.3 AC - I fit LF +- ��'" T17T-J AC r C j? I.� � I 52 LF
d ! PROJECT SIZE Tc-8.I MIN CSC PROJECT SIT= f! r• Tc-S.IMIN
-r• C �F a .�� 1.G ACRES
Joe
_ . .
A
1 "=200'
1 "=200'

DOWNSTREAM ANALYSIS FLOWS
10-YR
25-YR
Analysis Point
Pre Q (cfs)
Post Q (cfs)
Change
% Change
Pre Q (cfs)
Post Q (cfs)
Change
% Change
1
18.36
18.94
0.58
3.2%
23.46
24.16
0.7
3.0%
2
51.72
50.67
-1.05
-2.0%
68.18
66.67
-1.51
-2.2%
3
62.32
61.94
-0.38
-0.6%
82.67
81.55
-1.12
-1.4%
4
63.61
63.16
-0.45
-0.7%
84.06
83.2
-0.86
-1.0%

NRCS TRAVEL TIME CALCULATIONS
TYPE
SHEET
DATE: 2/10/2020
Flow Length (ft)
100
PROJECT: The Learning Experience Waxhaw
Upstream Elev (ft)
670
PROJECT M 7292
Downstream Elev (ft)
669.5
DESIGNER: SMC
Mannings n
0.240
CATCHMENT: Pre-Dev Culvert
Slope (ft/ft)
0.005
P2 (in)
3.12
Travel Time, Tt (min)
25.2
TYPE
SHALLOW CONCENTRATED
=CTIOP
2
3
4
Flow Length (ft)
668
Upstream Elev (ft)
669.5
Downstream Elev (ft)
637
Surface Type
Unpaved
N/A
N/A
N/A
N/A
Slope (ft/ft)
0.049
N/A
N/A
N/A
N/A
V (ft/s)
3.56
N/A
N/A
N/A
N/A
Travel Time, Tt (min)
3.13
N/A
N/A
N/A
N/A
Travel Time, Tt (min)
3.13
TYPE
OPEN CHANNEL
SECTION
2
3
Channel Type
Trapezoidal
N/A
N/A
N/A
N/A
Width, b (ft)
1.5
Flow Depth, h (ft)
2
Top Width, T (ft)
7
Side Slope, z
2
Pipe Dia., D (ft)
Area (ft)
8.50
N/A
N/A
N/A
N/A
Wetted Perimeter (ft)
8.30
N/A
N/A
N/A
N/A
Hydraulic Radius (ft)
1.02
N/A
N/A
N/A
N/A
Flow Length (ft)
423
Upstream Elev (ft)
637
Downstream Elev (ft)
618
Mannings n
0.035
Slope (ft/ft)
0.045
N/A
N/A
N/A
N/A
Velocity, V (ft/s)
9.17
N/A
N/A
N/A
N/A
Travel Time, Tt (min)
0.77
N/A
N/A
N/A
N/A
Travel Time, Tt (min)
0.77
TOTAL Tc (min)
29

NRCS TRAVEL TIME CALCULATIONS
TYPE
Flow Length (ft)
Upstream Elev (ft)
Downstream Elev (ft)
Mannings n
Slope (ft/ft)
P2 (in)
Travel Time, Tt (min)
TYPE
=CTIOP
Flow Length (ft)
Upstream Elev (ft)
Downstream Elev (ft)
Surface Type
Slope (ft/ft)
V (ft/s)
Travel Time, Tt (min)
Travel Time, Tt (min)
TYPE
SECTION
Channel Type
Width, b (ft)
Flow Depth, h (ft)
Top Width, T (ft)
Side Slope, z
Pipe Dia., D (ft)
Area (ft)
Wetted Perimeter (ft)
Hydraulic Radius (ft)
Flow Length (ft)
Upstream Elev (ft)
Downstream Elev (ft)
Mannings n
Slope (ft/ft)
Velocity, V (ft/s)
Travel Time, Tt (min)
Travel Time, Tt (min)
TOTAL Tc (min)
SHEET
100
670
668
0.240
0.020
3.12
14.5
228
668
652
Unpaved
0.070
4.27
0.89
Trapezoidal
1.5
2
7
2
8.50
8.30
1.02
625
652
622
0.035
0.048
9.48
1.10
W.
DATE: 2/10/2020
PROJECT: The Learning Experience Waxhaw
PROJECT M 7292
DESIGNER: SMC
CATCHMENT: Pre-Dev Subarea 2
SHALLOW CONCENTRATED
2 3 4
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
OPEN CHANNEL
2 3
N/A N/A N/A N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A

NRCS TRAVEL TIME CALCULATIONS
TYPE
SHEET
DATE: 2/10/2020
Flow Length (ft)
52
PROJECT: The Learning Experience Waxhaw
Upstream Elev (ft)
667
PROJECT M 7292
Downstream Elev (ft)
666
DESIGNER: SMC
Mannings n
0.240
CATCHMENT: Pre-Dev Subarea 3
Slope (ft/ft)
0.019
P2 (in)
3.12
Travel Time, Tt (min)
TYPE
SHALLOW CONCENTRATED
=CTIOP
2
3
4
Flow Length (ft)
469
Upstream Elev (ft)
666
Downstream Elev (ft)
621
Surface Type
Unpaved
N/A
N/A
N/A
N/A
Slope (ft/ft)
0.096
N/A
N/A
N/A
N/A
V (ft/s)
5.00
N/A
N/A
N/A
N/A
Travel Time, Tt (min)
1.57
N/A
N/A
N/A
N/A
Travel Time, Tt (min)
1.57
TYPE
OPEN CHANNEL
SECTION
2
3
Channel Type
Trapezoidal
N/A
N/A
N/A
N/A
Width, b (ft)
1.5
Flow Depth, h (ft)
2
Top Width, T (ft)
7
Side Slope, z
2
Pipe Dia., D (ft)
Area (ft)
8.50
N/A
N/A
N/A
N/A
Wetted Perimeter (ft)
8.30
N/A
N/A
N/A
N/A
Hydraulic Radius (ft)
1.02
N/A
N/A
N/A
N/A
Flow Length (ft)
122
Upstream Elev (ft)
621
Downstream Elev (ft)
613.86
Mannings n
0.035
Slope (ft/ft)
0.059
N/A
N/A
N/A
N/A
Velocity, V (ft/s)
10.46
N/A
N/A
N/A
N/A
Travel Time, Tt (min)
0.19
N/A
N/A
N/A
N/A
Travel Time, Tt (min)
0.19
TOTAL Tc (min)
10

PRE -DEVELOPMENT CN CALCULATIONS
ID
Incremental DA (sf)
Incremental DA (ac)
Total DA (ac)
Pre Area 1
274,768
6.3
6.3
Pre Area 2
512,136
11.8
18.1
Pre Area 3
157,284
3.6
21.7
Pre Area 4
29,357
0.7
22.4
Pre Sub Area 1
Soil Type
Land Use
HSG
CN
%
Area (ac)
CN*A
HeB
Residential 1 acre
D
84
86.1 %
5.4
455.641
A B
Residential 1 acre
B
68
13.9%
0.9
59.5476
Sum
515.189
Weighted CN
1 82
Pre Sub Area 2
Soil Type
Land Use
HSG
CN
%
Area (ac)
CN*A
HeB
Residential 1 acre
D
84
37.6%
4.4
372.691
A B
Residential 1 acre
B
68
34.8%
4.1
279.235
CeB2
Residential 1 acre
B
68
5.3%
0.6
42.5272
GfB2
Residential 1 acre
B
68
22.3%
2.6
178.935
TaC
Residential 1 acre
B
68
0.0%
0.0
0
Sum
873.389
Weighted CN
74
Pre Sub Area 3
Soil Type
Land Use
HSG
CN
%
Area (ac)
CN*A
HeB
Residential 1 acre
D
84
48.9%
1.8
147.874
CeB2
Residential 1 acre
B
68
33.4%
1.2
81.7632
GfB2
Residential 1 acre
B
68
8.0%
0.3
19.584
TaC
Residential 1 acre
B
68
9.8%
0.4
23.9904
Sum
273.211
Weighted CN
76
Pre Sub Area 4
Soil Type
Land Use
HSG
CN
%
Area (ac)
CN*A
HeB
Residential 1 acre
D
84
22.9%
0.2
13.4652
CeB2
Residential 1 acre
B
68
4.9%
0.0
2.3324
TaC
Residential 1 acre
B
68
72.2%
0.5
34.3672
Sum
50.1648
Weighted CN
72

ID
Project Site
Post Sub Area 1
Post Sub Area 2
Post Sub Area 3
Post Sub Area 4
POST -DEVELOPMENT CN CALCULATIONS
Incremental DA (sf)
43969
269,303
482,907
148,016
29,357
Incremental DA (ac)
1.0
6.2
11.1
3.4
0.7
Total DA (ac)
1.0
7.2
18.3
21.7
22.4
Post Sub Area 1
Soil Type
Land Use
HSG
CN
%
Area (ac)
HeB
Residential 1 acre
D
84
85.8%
5.3
A B
Residential 1 acre
B
68
14.2%
0.9
Sum
Weighted CN
Post Sub Area 2
Soil Type
Land Use
HSG
CN
%
Area (ac)
HeB
Residential 1 acre
D
84
37.9%
4.2
A B
Residential 1 acre
B
68
37.4%
4.2
CeB2
Residential 1 acre
B
68
0.6%
0.1
GfB2
Residential 1 acre
B
68
24.0%
2.7
TaC
Residential 1 acre
B
68
0.0%
0.0
Sum
Weighted CN
Post Sub Area 3
Soil Type
Land Use
HSG
CN
%
Area (ac)
HeB
Residential 1 acre
D
84
52.0%
1.8
CeB2
Residential 1 acre
B
68
29.1 %
1.0
GfB2
Residential 1 acre
B
68
8.5%
0.3
TaC
Residential 1 acre
B
68
10.4%
0.4
Sum
Weighted CN
Post Sub Area 4
Soil Type
Land Use
HSG
CN
%
Area (ac)
HeB
Residential 1 acre
D
84
22.9%
0.2
CeB2
Residential 1 acre
B
68
4.9%
0.0
TaC
Residential 1 acre
B
68
72.2%
0.5
Sum
Weighted CN

CN*A
446.846
59.8672
506.714
82
CN*A
353.38
282.295
4.5288
181.152
0
821.356
74
CN*A
148.512
67.2792
19.652
24.0448
259.488
76
CN*A
13.4652
2.3324
34.3672
50.1648
72

Channel Report
Hydraflow Express Extension for Autodesk0 AutoCADO Civil 3D0 by Autodesk, Inc. Thursday, Feb 13 2020
Sand Filter Outfall (drainage down slope to ditch) 10-YR
Trapezoidal
Highlighted
Bottom Width (ft)
= 9.50
Depth (ft)
= 0.21
Side Slopes (z:1)
= 10.00, 10.00
Q (cfs)
= 6.830
Total Depth (ft)
= 0.50
Area (sqft)
= 2.44
Invert Elev (ft)
= 651.00
Velocity (ft/s)
= 2.80
Slope (%)
= 9.60
Wetted Perim (ft)
= 13.72
N-Value
= 0.050
Crit Depth, Yc (ft)
= 0.24
Top Width (ft)
= 13.70
Calculations
EGL (ft)
= 0.33
Compute by:
Known Q
Known Q (cfs)
= 6.83
Elev (ft) Section
652.00
651.75
651.50
651.25
651.00
650.75
2 4 6 8 10 12 14 16 18 20 22 24
Reach (ft)
Depth (ft)
1.00
0.75
0.50
0.25
_n or

Channel Report
Hydraflow Express Extension for Autodesk0 AutoCADO Civil 3D0 by Autodesk, Inc. Thursday, Feb 13 2020
Sand Filter Outfall (drainage down slope to ditch) 25-YR
Trapezoidal
Highlighted
Bottom Width (ft)
= 9.50
Depth (ft)
= 0.24
Side Slopes (z:1)
= 10.00, 10.00
Q (cfs)
= 8.340
Total Depth (ft)
= 0.50
Area (sqft)
= 2.86
Invert Elev (ft)
= 651.00
Velocity (ft/s)
= 2.92
Slope (%)
= 9.60
Wetted Perim (ft)
= 14.32
N-Value
= 0.050
Crit Depth, Yc (ft)
= 0.27
Top Width (ft)
= 14.30
Calculations
EGL (ft)
= 0.37
Compute by:
Known Q
Known Q (cfs)
= 8.34
Elev (ft) Section
652.00
651.75
651.50
651.25
651.00
650.75
2 4 6 8 10 12 14 16 18 20 22 24
Reach (ft)
Depth (ft)
1.00
0.75
0.50
0.25
_n or

Channel Report
Hydraflow Express Extension for Autodesk0 AutoCADO Civil 3D0 by Autodesk, Inc.
XS A 10-YR Post
User -defined
Highlighted
Invert Elev (ft)
= 630.76
Depth (ft)
Slope (%)
= 7.00
Q (cfs)
N-Value
= 0.035
Area (sqft)
Velocity (ft/s)
Calculations
Wetted Perim (ft)
Compute by:
Known Q
Crit Depth, Yc (ft)
Known Q (cfs)
= 18.94
Top Width (ft)
EGL (ft)
(Sta, El, n)-(Sta, El, n)...
( 0.00, 635.40)-(22.94, 631.90, 0.035)-(27.86, 630.76, 0.035)-(30.41, 631.60, 0.035)-(61.12,
635.80, 0.035)
Elev (ft) Section
636.00
635.00
634.00
633.00
632.00
631.00
630.00
629.00
Thursday, Feb 13 2020
= 0.91
= 18.94
= 3.05
= 6.20
= 7.23
= 1.12
= 6.99
= 1.51
-5 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70
Depth (ft)
5.24
4.24
3.24
2.24
1.24
0.24
-0.76
_ 1 7A
Sta (ft)

Channel Report
Hydraflow Express Extension for Autodesk0 AutoCADO Civil 3D0 by Autodesk, Inc.
XS A 10-YR Pre
User -defined
Highlighted
Invert Elev (ft)
= 630.76
Depth (ft)
Slope (%)
= 7.00
Q (cfs)
N-Value
= 0.035
Area (sqft)
Velocity (ft/s)
Calculations
Wetted Perim (ft)
Compute by:
Known Q
Crit Depth, Yc (ft)
Known Q (cfs)
= 18.36
Top Width (ft)
EGL (ft)
(Sta, El, n)-(Sta, El, n)...
( 0.00, 635.40)-(22.94, 631.90, 0.035)-(27.86, 630.76, 0.035)-(30.41, 631.60, 0.035)-(61.12,
635.80, 0.035)
Elev (ft) Section
636.00
635.00
634.00
633.00
632.00
631.00
630.00
629.00
Thursday, Feb 13 2020
= 0.90
= 18.36
= 2.99
= 6.15
= 7.12
= 1.10
= 6.87
= 1.49
-5 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70
Depth (ft)
5.24
4.24
3.24
2.24
1.24
0.24
-0.76
_ 1 7A
Sta (ft)

Channel Report
Hydraflow Express Extension for Autodesk0 AutoCADO Civil 3D0 by Autodesk, Inc.
XS A 25-YR Post
User -defined
Highlighted
Invert Elev (ft)
= 630.76
Depth (ft)
Slope (%)
= 7.00
Q (cfs)
N-Value
= 0.035
Area (sqft)
Velocity (ft/s)
Calculations
Wetted Perim (ft)
Compute by:
Known Q
Crit Depth, Yc (ft)
Known Q (cfs)
= 24.16
Top Width (ft)
EGL (ft)
(Sta, El, n)-(Sta, El, n)...
( 0.00, 635.40)-(22.94, 631.90, 0.035)-(27.86, 630.76, 0.035)-(30.41, 631.60, 0.035)-(61.12,
635.80, 0.035)
Elev (ft) Section
636.00
635.00
634.00
633.00
632.00
631.00
630.00
629.00
Thursday, Feb 13 2020
= 1.00
= 24.16
= 3.73
= 6.48
= 8.30
= 1.23
= 8.04
= 1.65
-5 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70
Depth (ft)
5.24
4.24
3.24
2.24
1.24
0.24
-0.76
_ 1 7A
Sta (ft)

Channel Report
Hydraflow Express Extension for Autodesk0 AutoCADO Civil 3D0 by Autodesk, Inc.
XS A 25-YR Pre
User -defined
Highlighted
Invert Elev (ft)
= 630.76
Depth (ft)
Slope (%)
= 7.00
Q (cfs)
N-Value
= 0.035
Area (sqft)
Velocity (ft/s)
Calculations
Wetted Perim (ft)
Compute by:
Known Q
Crit Depth, Yc (ft)
Known Q (cfs)
= 23.46
Top Width (ft)
EGL (ft)
(Sta, El, n)-(Sta, El, n)...
( 0.00, 635.40)-(22.94, 631.90, 0.035)-(27.86, 630.76, 0.035)-(30.41, 631.60, 0.035)-(61.12,
635.80, 0.035)
Elev (ft) Section
636.00
635.00
634.00
633.00
632.00
631.00
630.00
629.00
Thursday, Feb 13 2020
= 0.99
= 23.46
= 3.65
= 6.43
= 8.18
= 1.21
= 7.92
= 1.63
-5 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70
Depth (ft)
5.24
4.24
3.24
2.24
1.24
0.24
-0.76
_ 1 7A
Sta (ft)

Channel Report
Hydraflow Express Extension for Autodesk0 AutoCADO Civil 3D0 by Autodesk, Inc.
XS B 10-YR Post
User -defined
Highlighted
Invert Elev (ft)
= 621.90
Depth (ft)
Slope (%)
= 5.50
Q (cfs)
N-Value
= 0.035
Area (sqft)
Velocity (ft/s)
Calculations
Wetted Perim (ft)
Compute by:
Known Q
Crit Depth, Yc (ft)
Known Q (cfs)
= 50.67
Top Width (ft)
EGL (ft)
(Sta, El, n)-(Sta, El, n)...
( 0.00, 624.90)-(26.67, 624.40, 0.035)-(29.26, 621.90, 0.035)-(33.83, 624.30, 0.035)-(59.82,
626.40, 0.035)
Elev (ft) Section
627.00
626.00
625.00
624.00
623.00
622.00
621.00
Thursday, Feb 13 2020
= 2.00
= 50.67
= 5.88
= 8.62
= 7.18
= 2.37
= 5.88
= 3.15
0 5 10 15 20 25 30 35 40 45 50 55 60 65
Depth (ft)
5.10
4.10
3.10
2.10
1.10
0.10
_1 ar)
Sta (ft)

Channel Report
Hydraflow Express Extension for Autodesk0 AutoCADO Civil 3D0 by Autodesk, Inc.
XS B 10-YR Pre
User -defined
Highlighted
Invert Elev (ft)
= 621.90
Depth (ft)
Slope (%)
= 5.50
Q (cfs)
N-Value
= 0.035
Area (sqft)
Velocity (ft/s)
Calculations
Wetted Perim (ft)
Compute by:
Known Q
Crit Depth, Yc (ft)
Known Q (cfs)
= 51.72
Top Width (ft)
EGL (ft)
(Sta, El, n)-(Sta, El, n)...
( 0.00, 624.90)-(26.67, 624.40, 0.035)-(29.26, 621.90, 0.035)-(33.83, 624.30, 0.035)-(59.82,
626.40, 0.035)
Elev (ft) Section
627.00
626.00
625.00
624.00
623.00
622.00
621.00
Thursday, Feb 13 2020
= 2.01
= 51.72
= 5.94
= 8.71
= 7.22
= 2.39
= 5.91
= 3.19
0 5 10 15 20 25 30 35 40 45 50 55 60 65
Depth (ft)
5.10
4.10
3.10
2.10
1.10
0.10
_1 ar)
Sta (ft)

HY-8 Culvert Analysis Report
Crossing Discharge Data
Discharge Selection Method: User Defined

Table 1 - Summary of Culvert Flows at Crossing: Hawkstone Dr Culvert
Headwater
Elevation (ft)
Discharge Names
Total Discharge
(cfs)
48" RCP under
Hawstone Dr
Discharge (cfs)
Roadway
Discharge (cfs)
Iterations
617.43
10-yr
62.00
62.00
0.00
1
618.21
25-yr
82.00
82.00
0.00
1
628.20
Overtopping
214.41
214.41
0.00
Overtopping

Rating Curve Plot for Crossing: Hawkstone Dr Culvert
62.2
630
62
0
>
a� 626
w
ID 624
622
aD
z
620
61
Total Rating Curve
Crossing: Ha-,vkstone Dr Cuh-ert
EAU BU 1 UU 120 140 1 EAU 180 2UU 22U
Total Discharge (cfs)

Table 2 - Culvert Summary Table: 48" RCP under Hawstone Dr
Discharge
Total
Culvert
Headwater
Inlet Control
Outlet
Flow
Normal
Critical
Outlet Depth
Tailwater
Outlet
Names
Discharge
Discharge
Elevation (ft)
Depth (ft)
Control
Type
Depth (ft)
Depth (ft)
(ft)
Depth (ft)
Velocity
(cfs)
(cfs)
Depth (ft)
(ft/s)
10-yr
62.00
62.00
617.43
3.565
0.101
1-S2n
1.317
2.371
1.475
1.253
14.236
25-yr
82.00
82.00
618.21
4.346
1.032
5-S2n
1.529
2.741
1.743
1.422
15.076

Straight Culvert
Inlet Elevation (invert): 613.86 ft, Outlet Elevation (invert): 610.84 ft
Culvert Length: 115.64 ft, Culvert Slope: 0.0261

Culvert Performance Curve Plot: 48" RCP under Hawstone Dr
68
— 66
0 64
a 622
w
? 60
618
aD
z
616
614
Perfonnan e 111-Ve
uh-ert: 48" RCP tuider Hav,-=lone Dr
0 0
Inlet Control Elev Outlet Control Elev
EAU BU 1 UU 120 140 1 EAU 180 2UU 22U
Total Discharge (cfs)

Water Surface Profile Plot for Culvert: 48" RCP under Hawstone Dr
Crossing - H wkston�-- Dr Culvert, Design Discharge - 82.0 cf
uh-ert - 48" RCP tinder Ha -,•stone Dr, ttl-. rz Discharge - 82-0 cfs
62�
,2C
62'
622
0 62C
4-
a 61�
w
61C
614
612
61(
V ju 1VV IJV
Stati an (ft)
Site Data - 48" RCP under Hawstone Dr
Site Data Option: Culvert Invert Data
Inlet Station: 0.00 ft
Inlet Elevation: 613.86 ft
Outlet Station: 115.60 ft
Outlet Elevation: 610.84 ft
Number of Barrels: 1
Culvert Data Summary - 48" RCP under Hawstone Dr
Barrel Shape: Circular
Barrel Diameter: 4.00 ft
Barrel Material:
Embedment: 0.00 in
Barrel Manning's n: 0.0120
Culvert Type: Straight
Inlet Configuration: Square Edge with Headwall
Inlet Depression: None

Table 3 - Downstream Channel Rating Curve (Crossing: Hawkstone Dr Culvert)
Flow (cfs)
Water Surface
Elev (ft)
Depth (ft)
Velocity (ft/s)
Shear (psf)
Froude Number
62.00
612.25
1.25
5.48
2.74
1.08
82.00
612.42
1.42
5.92
3.11
1.11

Tailwater Channel Data - Hawkstone Dr Culvert
Tailwater Channel Option: Irregular Channel
Roadway Data for Crossing: Hawkstone Dr Culvert
Roadway Profile Shape: Constant Roadway Elevation
Crest Length: 130.00 ft
Crest Elevation: 628.20 ft
Roadway Surface: Paved
Roadway Top Width: 40.00 ft

1S
Pre Project Site
6S �
17L
Pre Dev Subarea 1
Pre Analysis Point 1
7S 19�L
7S
Pre Analysis
Pre Dev Sub Area 2
8S
Pre Dev Subarea 3
11S
Pre-Dev Sub Area 4
2S �� 5P
Post Project Site to SF
20S
Post Dev Subarea 1
13S
Post Dev Sub Area
Subcat Reach on Link
10L
Pre Analysis int 3
(Hawkstone C vert
U/S)
V 12L
Pre Analysis Point 4
(Hawkstone Culvert
D/S)
Sand Filter \ ,
�16L
Post Analysis Poi 1
18L
2 Post Analysis Po' t 2
—ate 19 L
14S
Post Analysis Poin
Post Dev Subarea 3 (Hawkstone Culvert
U/S)
15S
Post-Dev Sub Area 4
Post Analysis Point 4
(Hawkstone Culvert
D/S)

Sand Filter - Oldcastle Stormcapture
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 2
Area Listing (all nodes)
Area CN Description
(acres) (su bcatch me nt-n u mbe rs)
0.220
77
(is)
1.010
91
(2S)
12.500
82
(6S, 20S)
23.000
74
(7S, 13S)
7.000
76
(8S, 14S)
1.400
72
(11 S, 15S)
45.130
77
TOTAL AREA

Sand Filter - Oldcastle Stormcapture
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 3
Soil Listing (all nodes)
Area Soil Subcatchment
(acres) Group Numbers
0.000 HSG A
0.000 HSG B
0.000 HSG C
0.000 HSG D
45.130 Other 1 S, 2S, 6S, 7S, 8S, 11 S, 13S, 14S, 15S, 20S
45.130 TOTAL AREA

Sand Filter - Oldcastle Stormcapture
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 4
Ground Covers (all nodes)
HSG-A HSG-B HSG-C HSG-D Other Total Ground Subcatchment
(acres) (acres) (acres) (acres) (acres) (acres) Cover Numbers
0.000 0.000 0.000 0.000 45.130 45.130 1 S, 2S, 6S, 7S, 8S,
11 S, 13S, 14S, 15S,
20S
0.000 0.000 0.000 0.000 45.130 45.130 TOTAL
AREA

Sand Filter - Oldcastle Stormcapture
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 5
Pipe Listing (all nodes)
Line# Node In -Invert Out -Invert Length Slope n Diam/Width Height Inside -Fill
Number (feet) (feet) (feet) (ft/ft) (inches) (inches) (inches)
1 5P 651.00 650.40 20.1 0.0299 0.013 18.0 0.0 0.0

Sand Filter - Oldcastle Stormcapture Type/1 24-hr 10-yr Rainfall=5.16"
Prepared by {enter your company name here} Printed 2/12/2020
HvdroCAD® 10.00-24 s/n 10182 © 2018 HvdroCAD Software Solutions LLC Paae 6
Time span=0.00-120.00 hrs, dt=0.05 hrs, 2401 points
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN
Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method
Subcatchment 1 S: Pre Project Site Runoff Area=0.220 ac 0.00% Impervious Runoff Depth=2.76"
Tc=18.0 min CN=77 Runoff=0.71 cfs 0.051 of
Subcatchment2S: Post Project Site to SF Runoff Area=1.010 ac 0.00% Impervious Runoff Depth=4.14"
Tc=5.0 min CN=91 Runoff=6.94 cfs 0.348 of
Subcatchment6S: Pre Dev Subarea 1 Runoff Area=6.300 ac 0.00% Impervious Runoff Depth=3.22"
Tc=28.0 min CN=82 Runoff=18.36 cfs 1.692 of
Subcatchment7S: Pre Dev Sub Area 2 Runoff Area=11.900 ac 0.00% Impervious Runoff Depth=2.49"
Tc=16.0 min CN=74 Runoff=36.85 cfs 2.472 of
Subcatchment8S: Pre Dev Subarea 3 Runoff Area=3.600 ac 0.00% Impervious Runoff Depth=2.67"
Tc=10.0 min CN=76 Runoff=14.55 cfs 0.800 of
Subcatchment 11 S: Pre-Dev Sub Area 4 Runoff Area=0.700 ac 0.00% Impervious Runoff Depth=2.32"
Tc=5.0 min CN=72 Runoff=2.93 cfs 0.135 of
Subcatchment 13S: Post Dev Sub Area 2 Runoff Area=11.100 ac 0.00% Impervious Runoff Depth=2.49"
Tc=16.0 min CN=74 Runoff=34.37 cfs 2.306 of
Subcatchment 14S: Post Dev Subarea 3 Runoff Area=3.400 ac 0.00% Impervious Runoff Depth=2.67"
Tc=10.0 min CN=76 Runoff=13.74 cfs 0.756 of
Subcatchment 15S: Post-Dev Sub Area 4 Runoff Area=0.700 ac 0.00% Impervious Runoff Depth=2.32"
Tc=5.0 min CN=72 Runoff=2.93 cfs 0.135 of
Subcatchment20S: Post Dev Subarea 1 Runoff Area=6.200 ac 0.00% Impervious Runoff Depth=3.22"
Tc=28.0 min CN=82 Runoff=18.06 cfs 1.665 of
Pond 5P: Sand Filter Peak Elev=656.74' Storage=0.060 of Inflow=6.94 cfs 0.348 of
Outflow=6.83 cfs 0.348 of
Link 9L: r�sis Point 2 Inflow=51.72 cfs 4.164 of
Primary=51.72 cfs 4.164 of
Link 10L: Pre Analysis Point 3 (Hawkstone Culvert U/S)
Link 12L: Pre Analysis Point 4 (Hawkstone Culvert D/S)
Link 16L: Post Analysis Point 1
Link 17L: Pre Analysis Point 1
Inflow=62.32 cfs 4.964 of
Primary=g i 4.964 of
Inflow=63.61 cfs 5.099 of
Primary 5.099 of
Inflow=18.94 cfs 2.013 of
Primary=18.94 cfs 2.013 of
Inflow=18.36 cfs 1.692 of
Primary=18.36 cfs 1.692 of

Sand Filter - Oldcastle Stormcapture Type/1 24-hr 10-yr Rainfall=5.16"
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 7
Link 18L: Post Analysis Point 2 Inflow=50.67 cfs 4.319 of
Primary=50.67 cfs 4.319 of
Link 19L: Post Analysis Point 3 (Hawkstone Culvert U/S) Inflow=61.94 cfs 5.075 of
Primary=61.94 cfs 5.075 of
Link 21 L: Post Analysis Point 4 (Hawkstone Culvert D/S) Inflow=63.16 cfs 5.210 of
Primary=63.16 cfs 5.210 of
Total Runoff Area = 45.130 ac Runoff Volume = 10.360 of Average Runoff Depth = 2.75"
100.00% Pervious = 45.130 ac 0.00% Impervious = 0.000 ac

Sand Filter - Oldcastle Stormcapture Type/1 24-hr 10-yr Rainfall=5.16"
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 8
Summary for Subcatchment 1S: Pre Project Site
Runoff = 0.71 cfs @ 12.11 hrs, Volume= 0.051 af, Depth= 2.76"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Type II 24-hr 10-yr Rainfall=5.16"
Area (ac) CN Description
0.220 77
0.220 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
18.0 Direct Entry,
Subcatchment 1S: Pre Project Site
Hydrograph
---------+--+-------+--+--+--+-------+--+--+----------+--+--+----- ■Runoff
0.750.71 cfs
0.7 Xp� �J 2 -hr- -
/
-- ---rt--r----rt--t--r-- --�--rt - -- t
0.65--II-- - -- -- -- --ill---III-- -- --ill---ill-- ----1fl-ryr-RairtfaiFF�frAG"--
0.6 I I I I I 1
Rind Ate&Q.22IG at--
0.55 --'---�--L--L--L--1--J--1--L--�--'---'--�--L--L--L--1---1--1--L--�--'---
w 0.45
-- - -- --------- -- -- ----------Runoff�©ePth;2.7,67--
0.35 ITd=18.0 %nih
------+-----------+--+-----------+-------I---I--+--+----I--j--
0.3 C 7'F
0.25
--I-- r--r--r-------r--r--r--r-------r--r--r----------r--r--r--I---
0.2
---- ------------------------------------------------------------
0.15
- -� - 1 - - 7 - - r 1 - - 7 - - T - - r 1 - - 7 - - r 7 - - T - - r
0.1
--'-- 0.057-3
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

Sand Filter - Oldcastle Stormcapture Type/1 24-hr 10-yr Rainfall=5.16"
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 9
Summary for Subcatchment 2S: Post Project Site to SF
[49] Hint: Tc<2dt may require smaller dt
Runoff = 6.94 cfs @ 11.95 hrs, Volume= 0.348 af, Depth= 4.14"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Type II 24-hr 10-yr Rainfall=5.16"
Area (ac) CN Description
1.010 91
1.010 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
Subcatchment 2S: Post Project Site to SF
Hydrograph
I I I I I I I I I I I I I I I I I I I I I I I ■Runoff
6.94 cfs - -- --------------'I-- - -- --- ---------I- -- --
Type IV24-h'Ir
-I-- -- -- --II--------I-- -- -- ---1�ryr-Faifa►11T5:'11�"-
6 I I I I I I I I I I I I I I I I I
Runbff Awes=1.010 at
5 ROnpff'IVQIL;m'Ie='10.$40 cif
w --I- - ----------- I - - - I-------
--I--I- -I--- I
4H-
Rulnoff � De— 0= 4-11 �1
3 I I I I I I I I I I I I I I I I I I I
LL
TcT5.'0 to i i�
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
3 CAN=91
2
---- ----;--;------------- ---;--;-----I- ---------- ;----------------
1 I I I I I I I I I I I I I I I I I I I I I
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

Sand Filter - Oldcastle Stormcapture Type/1 24-hr 10-yr Rainfall=5.16"
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 10
Summary for Subcatchment 6S: Pre Dev Subarea 1
Runoff = 18.36 cfs @ 12.22 hrs, Volume= 1.692 af, Depth= 3.22"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Type II 24-hr 10-yr Rainfall=5.16"
Area (ac) CN Description
6.300 82
6.300 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
28.0 Direct Entry,
Subcatchment 6S: Pre Dev Subarea 1
Hydrograph
20 ----------Ii--Ii---Ii---Ii---Ii---Ii---Ii------T-----IIi -------'------�---T---T-�
19 18.36 cfs -----
u2418 Type- T-h�I----
-
■Runoff
-
1 7 -'- - -' - - - - - - - - - -'- - -'- - -' - - -' - - - - - -
�I I I I I
16.�
16 1 OyRa nfa[1#1.--_
15 ---- --- -- -- ------------ -- -- --RUrfbff-Alre&6.300at--
14--------+--+-----------------�p-+---------------+----�--
13 --�r----t--t--r--r--�r--�r------t--tR-"np flrVp1pfir�e=1-$9�
12 --r- ---r--r--r--r--r-------r--r--r--r--r--r--r----r--*--r--r--r--
u 11 ---- ----- T-- r - -r-----------T--T--T--Runes Dept I---
10 _111
$ --'-- -'----1--L----1---1---1--J--1--1--1--L----1---1--J--1--11,1�8-
I I I I I I I I I I I I I I I I I I I I I I
6 j---- --- -- -- ------------ -- -- -- -- --------- -- -- -- -- --
5 j - I - ---+--+--+--+----------+--+--+--+--+--+-------+--+--+--+--+--
4 --Ir- -li--t--t--r--r--Ir--Ir--li--t--t--t--T--r--Ir--Ir--li--t--t--t--r--Ir--
3 j--Ir- -li--t--t--r--r--Ir--Ir--li--t--t--t--T--r--Ir--Ir--li--t--t--t--r--Ir--
2 ---- ----T--r--r----------- T-- T-- T-- r-- T---------T--T--T_ I-
� I I I I I I I I I I I I I I I I I I I I
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

Sand Filter - Oldcastle Stormcapture Type/1 24-hr 10-yr Rainfall=5.16"
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 11
Summary for Subcatchment 7S: Pre Dev Sub Area 2
Runoff = 36.85 cfs @ 12.09 hrs, Volume= 2.472 af, Depth= 2.49"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Type II 24-hr 10-yr Rainfall=5.16"
Area (ac) CN Description
11.900 74
11.900 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
16.0 Direct Entry,
Subcatchment 7S: Pre Dev Sub Area 2
Hydrograph
--r--i---i--r--r--r--r--r--i---i--r--r--r--t--r--r--r--i--r--r--r--r--r--
40 ■Runoff
36.85 cfs--�--r--r--�---�---�--,--�--�--rt--r--r--�---�--r--,--rt--r--r--
38 T--T--r--r--T-------T--T--T--T--r--T-----T`/rr�-pr- T r--
36 --I-- -I-- -- T------------------- -- -- T--------I---i J1 "r-� -hl' -
34 ---- ----------------------------------
32
-- -- -- - - -- -- ---a7yrRa�_faICT'C6---
30 ---- -----1--L----1---1---1--J--1--1-RuhDff Ar6& 11 900-ad -
28 --i-- -i-- -- -- ----------i-- -- -- --+-- ---------+-- --+-- -- --
26 --'-- -'-- -- -- ----------'-- --4 -- 4RttQ#fIVIt�rle=2:47-elf -
w 24 --r- ---r--r--r--r--r-------r--r--r--t--r--r--r----r--r--r--r--r--
22 - - -Run Deptkv;2.49„--
-
18 -i-- -I -- T ----- - -----i-- -- T -- I 'Tt�16.1i�li-
a - -- - -- ------ - - - - -l- _-
16 --�-- -�-- -- -- ----------�---- -- -- -----------------
--
14 -'------------------------------'--------------'---7
12 j ---- --- -- -- ------------ -- -- -- -- --------- -- -- -- -- --
10 -------+--+--+--+----------+--+--+--+--+--+--�---�--+--+--+--+--+--
8 J --Ir----y--rt--r--r--Ir-------y--rt--rt--+--r--Ir--'r----y----+--r--Ir--
6 --I-- ---r--r--r__r--________r--r--r--t--r--r--I___I--r--r--Y__r--r--
i
4
7 I I I I I I I I I I I I I I I I I I I I
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

Sand Filter - Oldcastle Stormcapture Type/1 24-hr 10-yr Rainfall=5.16"
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 12
Summary for Subcatchment 8S: Pre Dev Subarea 3
Runoff = 14.55 cfs @ 12.02 hrs, Volume= 0.800 af, Depth= 2.67"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Type II 24-hr 10-yr Rainfall=5.16"
Area (ac) CN Description
3.600 76
3.600 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
10.0 Direct Entry,
Subcatchment 8S: Pre Dev Subarea 3
Hydrograph
16 ■Runoff
14.55 cfs -- --r--r-----r-r--------------r--r--r-r--r--,-----r--r
-
-
15 ------L--L--L--1---1---1--J--1--L--1--L-- -----i 1J-p1-ry1
T1 1n " 11 24-h'�r
14 -
---- ---------------------------------------------I-----------------
13 1-Or-1-RainfaI[;;&,'-6�"--
12 ---- -- --' --'-----------''-- -- --'' rrbff-AireA--1600-arc--
-- ---r--r----rR�nOff VQI mLe'O-$Oo_aif -
10 ------L--L--L--L---------L--L--L--
w 9 -- -- -- - -- -- -- -- --� raaf#'�Depth=�2.671
3 8-
0 --r----r--r--r--r--r-------r--r--r--t--r--r--r--i�W���.
a 7
L - - L - -'- - -'- - -' - - L - - 1 - - 1 - - L - - L - - L - -'- - -' - - L - - - - L - - L - - L - -
6 ---- --- -- --, --------------- -- -- --------------- - N=Z6
5
4
3
--r- -i--r--r--r--r--r--r--i--r--r--r--r--r--r--r--i--r--r--r--r--r--
2 ---- ---L--L--L--L--1---1---1--J--1--L--L--L--L-------L--L--L--L--L--
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

Sand Filter - Oldcastle Stormcapture Type/1 24-hr 10-yr Rainfall=5.16"
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 13
Summary for Subcatchment 11S: Pre-Dev Sub Area 4
[49] Hint: Tc<2dt may require smaller dt
Runoff = 2.93 cfs @ 11.96 hrs, Volume= 0.135 af, Depth= 2.32"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Type II 24-hr 10-yr Rainfall=5.16"
Area (ac) CN Description
0.700 72
0.700 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
Subcatchment 11S: Pre-Dev Sub Area 4
Hydrograph
� � � � � � � � � � � � � � � � � � � � � � � ■Runoff
2193 cfs-�--�--�--�---�---�--�--�--�--�--�--�---�---�--�-�--'�---'�---�-
3 Type II', 24-h',r
1Oryr RainfallT5.�16�;"
RWnbffl Awea=0300 at.
2 RLInOff VQme=0. 3 --af
k6ngff Dept' &1�2.132"
Tc"5.'0 M i h
1 I I I I I I I I I I I I I I I I I I I I I I
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

Sand Filter - Oldcastle Stormcapture Type/1 24-hr 10-yr Rainfall=5.16"
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 14
Summary for Subcatchment 13S: Post Dev Sub Area 2
Runoff = 34.37 cfs @ 12.09 hrs, Volume= 2.306 af, Depth= 2.49"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Type II 24-hr 10-yr Rainfall=5.16"
Area (ac) CN Description
11.100 74
11.100 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
16.0 Direct Entry,
Subcatchment 13S: Post Dev Sub Area 2
Hydrograph
--�---�---�--�--1--L--�--1---1---1--J--1--1--1--L--L--1---1--J--1--1--L--�--
38--J--L----1---1---1--J--1--J--J--J--J-------J----J--L--J-- ■Runoff
36 34.37 cfs L--1--L--L--------1--J--1--1--L--L--L-------J--L--L--L--L--
34 --'---'----L---------------------L--J--J--------'���R1p uli��gi�
i i i i i i i i 'll
32 - -'- - -' - - J - - 1 - - L - - J - -'- - -'- - -' - - J - - 1 - J - -'- - -' - - J - J - - 1 - - L - - L
30 --'-----J----L--' ----------J----'--'-
10ryr Rai-nfaIIT5.�L16�"_
28 - -- -- -- - -- -- Ruhoff Ar6&I1. 00-at -
26 ---- ---J-- --L------------J-- -- -- ---------------J----L-a-f--
24 --'-----L--L----------------J--L-- I' nQ f V-pI = • 0$-cj' -
w 22
--- --I----- -I---- Li---- -Li-------- ---_
------------------------- -- --
20 --Runoff-D"t�h��.i Z49'
--- - ------------ -- -
16LL--i---------- -- -- -- ---i-----
r=
lillfll--
---- --- -- -- --------------- -- -- --------------- -- -- ----
14 ---- --- -- -- ------------ -- -- -- --------------- �-PN=74 -
12 -+- -�-- -- -- ----------�---- -- -- -------------�-- -- -- --� --
10
8
6
41
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

Sand Filter - Oldcastle Stormcapture Type/1 24-hr 10-yr Rainfall=5.16"
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 15
Summary for Subcatchment 14S: Post Dev Subarea 3
Runoff = 13.74 cfs @ 12.02 hrs, Volume= 0.756 af, Depth= 2.67"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Type II 24-hr 10-yr Rainfall=5.16"
Area (ac) CN Description
3.400 76
3.400 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
10.0 Direct Entry,
Subcatchment 14S: Post Dev Subarea 3
Hydrograph
15 ■Runoff
13.74 cfs -- - - - --JI-- -- -- - --JI-- -- -
14
--r- ��j/j ----1--+--T--r----------1--7--7--T--T--r--I---I + I- +--
13 '
--'-- --'----1--L----1---1---1--J--1--1--1--L-------ainfallT5.116�
'-- - 1--1--L--
r " 12I I I I I I I I I I I I I I 10;- R --I--
11 1 rtbff Aire& =14�00 arc- -
+ I I I I I I I I I I I I I I I I I I I I I I
10---------t--r--------'----rt--rtR ��#f1 Ir�mle�0.7-50 Of -
_ 9 I I I I I I I I I I I I
w---;--;--------------I--- ----F-;--RunoffDepfh=�Z67'r-
6 5
4
3
---------+--r--i-----------------+--i--------------- + - -
r
--i --
2
1 I I I I I I I I I I I I I I I I I I I I
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

Sand Filter - Oldcastle Stormcapture Type/1 24-hr 10-yr Rainfall=5.16"
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 16
Summary for Subcatchment 15S: Post-Dev Sub Area 4
[49] Hint: Tc<2dt may require smaller dt
Runoff = 2.93 cfs @ 11.96 hrs, Volume= 0.135 af, Depth= 2.32"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Type II 24-hr 10-yr Rainfall=5.16"
Area (ac) CN Description
0.700 72
0.700 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
Subcatchment 15S: Post-Dev Sub Area 4
Hydrograph
� � � � � � � � � � � � � � � � � � � � � � � ■Runoff
2193 cfs-�--�--�--�---�---�--�--�--�--�--�--�---�---�--�-�--'�---'�---�-
3 Type II', 24-h',r
1Oryr RainfallT5.�16�;"
RWnbffl Awea=0300 at.
2 RLInOff VQme=0. 3 --af
k6ngff Dept' &1�2.132"
TC"5.'0 M i h
1 I I I I I I I I I I I I I I I I I I I I I I
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

Sand Filter - Oldcastle Stormcapture Type/1 24-hr 10-yr Rainfall=5.16"
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 17
Summary for Subcatchment 20S: Post Dev Subarea 1
Runoff = 18.06 cfs @ 12.22 hrs, Volume= 1.665 af, Depth= 3.22"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Type II 24-hr 10-yr Rainfall=5.16"
Area (ac) CN Description
6.200 82
6.200 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
28.0 Direct Entry,
Subcatchment 20S: Post Dev Subarea 1
Hydrograph
--�---�---�--�--1--L--�--1---1---1--J--1--1--1--L--L--1---1--J--1--1--L--�--
20---------- ----r--r------------'--'--+--r-------------- + - -
r-- -- ■Runoff
19 18.06 cfs -- -- ------------ -- -- -- -- --------- -- --�-} -- --
18 --i----r--r--r--r--r-------r--r--r--t--r--r-----ITa;.►p-HY�_/�-hIr-
i Y�� Nl�=f 24
17 --i-----r--r--r--r--r--r----r--r--r--r--r-^-r--I- -I--r--r--r7---r-c-r--
15 --
--r- ---r--',Rwnbff-Awee=6.200 at -
14 ---- --- -- -- -- -----------I--I---------------------------------
13 ' ---- --- -------------
------,-- -- npff,-Vp14m,e=1. � - -
12 ---- --- -- -- --------------- ----------------------------------
u 11 --'---'---'---'-----------------'---' ---' --!--RLmof# D"W� 1 2����--
3 10 --'-- -'----1--L--r--1---1---1--J--1--1--1--L--r7---'- J-- 1^-L--r--
a 9 -1- -'----1--L--r--1---1---1--J--1--1--1--L-- -----=6-Q.V- ��1--
i
8 ---- --- ----r--r---------- -- -- -- --r--------- -- - fir v
7----------r--r-----------'--'----r---------r----�- --
6----------+--r---------------+--r---------r----+--r--�--
5--------+--+--r---------------+--r---------r----+--r--�--
4 '
3
r-- r-- r - -r--r--i---i--r- -r- r--T--r--r--i---i--r--r--r--r--r--
2
i r-- r-- r--r--r--i i--r--r-- r-- T-- r - -r--r i--r--r--r--r--r--
1
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

Sand Filter - Oldcastle Stormcapture Type/1 24-hr 10-yr Rainfall=5.16"
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 18
Summary for Pond 5P: Sand Filter
Inflow Area = 1.010 ac, 0.00% Impervious, Inflow Depth = 4.14" for 10-yr event
Inflow = 6.94 cfs @ 11.95 hrs, Volume= 0.348 of
Outflow = 6.83 cfs @ 11.96 hrs, Volume= 0.348 af, Atten= 2%, Lag= 0.4 min
Primary = 6.83 cfs @ 11.96 hrs, Volume= 0.348 of
Routing by Stor-Ind method, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Peak Elev= 656.74' @ 11.96 hrs Surf.Area= 0.000 ac Storage= 0.060 of
Plug -Flow detention time= 299.3 min calculated for 0.348 of (100% of inflow)
Center -of -Mass det. time= 299.1 min ( 1,080.7 - 781.6 )
Volume Invert Avail.Storage Storage Description
#1 652.50' 0.063 of Custom Stage Data Listed below
Elevation Cum.Store
(feet) (acre-feet)
652.50 0.000
653.00 0.007
654.00 0.021
655.00 0.035
656.30 0.054
657.00 0.063
Device
Routing
Invert
Outlet Devices
#1
Primary
651.00'
18.0" Round RCP -Round 18"
L= 20.1' RCP, square edge headwall, Ke= 0.500
Inlet / Outlet Invert= 651.00' / 650.40' S= 0.0299 '/' Cc= 0.900
n= 0.013, Flow Area= 1.77 sf
#2
Device 1
652.50'
Special & User -Defined
Head (feet) 0.00 0.50 1.50 2.50 3.80 4.50
Disch. (cfs) 0.000 0.010 0.015 0.020 0.026 0.030
#3
Device 1
656.30'
Custom Weir/Orifice, Cv= 2.62 (C= 3.28)
Head (feet) 0.00 1.00
Width (feet) 7.00 7.00
Primary OutFlow Max=6.68 cfs @ 11.96 hrs HW=656.74' (Free Discharge)
L1=RCP_Round 18" (Passes 6.68 cfs of 19.00 cfs potential flow)
�__2=Special & User -Defined (Custom Controls 0.03 cfs)
3=Custom Weir/Orifice (Weir Controls 6.65 cfs @ 2.17 fps)

Sand Filter - Oldcastle Stormcapture Type/1 24-hr 10-yr Rainfall=5.16"
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 19
Pond 5P: Sand Filter
Hydrograph
■ Inflow
6.94 cfsT------- I'I-----------'I-- I'I------- I'I--'----'I-- I'I -- ❑ Primary
6.83 cfs
7 Inflow '',Area=1.01'I 0 '',ar,
I I I I I I I I I I
Poa'Ik lEIeV=056.74'
6
-- - --' --+--' --' -- -- ----Stbrag"11 of -
T 6I
5
---- -- -
+--r----t--t--r--t--t--r--t--t--r--I--t--t--r--I--t--t
--
y I I I I I I I I I I I I I I I I I I I I I
4
3
LL
3
2
L - - L - -'- - - - L - - L - -'- - J - - 1 - - L - -'- - - - L - - L
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

Sand Filter - Oldcastle Stormcapture Type/1 24-hr 10-yr Rainfall=5.16"
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 20
Summary for Link 9L: Pre Analysis Point 2
Inflow Area = 18.200 ac, 0.00% Impervious, Inflow Depth = 2.75" for 10-yr event
Inflow = 51.72 cfs @ 12.11 hrs, Volume= 4.164 of
Primary = 51.72 cfs @ 12.11 hrs, Volume= 4.164 af, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Link 9L: Pre Analysis Point 2
Hydrograph
4�1
---�----T--T--�------T--r--�---T--T-T--T--r--i-- ■ Inflow
❑ Primary
ss-r--I---I--�--t--I---I--y--T + -I-+ r--I- '+-I---� ow Are -a= 8'ZW1aq5045-L--'---'--L--L--'---'--J--L--L-------L--L-------L--L--L--'--
40 -- - li--i-----i-- li--i --i-----i-- li --i-----i-- li --i-----i-- li--i --i --i--
35 r--1---1--I--+--r--r--1--+--r--1---1--�--r--r--1--
y I I I I I I I I I I I I I I I I I I I I I
30 - - 1 1
p1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
a 25 -- r--L--1--1--r--r--1--1--r--r--L--1--1--r--L--1---1--r--L--L--1--
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
20 -- --------- ---------------------- --------- ---------
15 -- T--r--1---1--T--r--1---1-----T--r--1---1--T--r--1---1--T--r --r --1--
10 --1--r--r--1--r--r--r--1--r--t--r-----1--r--r--1---1--r--r--r--1--
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

Sand Filter - Oldcastle Stormcapture Type/1 24-hr 10-yr Rainfall=5.16"
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 21
Summary for Link 10L: Pre Analysis Point 3 (Hawkstone Culvert U/S)
Inflow Area = 21.800 ac, 0.00% Impervious, Inflow Depth = 2.73" for 10-yr event
Inflow = 62.32 cfs @ 12.08 hrs, Volume= 4.964 of
Primary = 62.32 cfs @ 12.08 hrs, Volume= 4.964 af, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Link 10L: Pre Analysis Point 3 (Hawkstone Culvert U/S)
Hydrograph
-L--1---1--1--L--1---1--J--1--L--1---1--1--L--1---1--1--L-- --'-- ■ Inflow
-!
❑ Primary -- -- --! -- ---! -
� f o-w r =�1 T&Q0 a-
I
00
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

Sand Filter - Oldcastle Stormcapture Type/1 24-hr 10-yr Rainfall=5.16"
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 22
Summary for Link 12L: Pre Analysis Point 4 (Hawkstone Culvert D/S)
Inflow Area = 22.500 ac, 0.00% Impervious, Inflow Depth = 2.72" for 10-yr event
Inflow = 63.61 cfs @ 12.07 hrs, Volume= 5.099 of
Primary = 63.61 cfs @ 12.07 hrs, Volume= 5.099 af, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Link 12L: Pre Analysis Point 4 (Hawkstone Culvert D/S)
Hydrograph
■ Inflow
70 -+--�---�--+--+--�---�--+--+--+--�---�--+--+--�---�--+ +--�-- ■
63.61 cfs Primary
60
557
50--i---------i --i-------i--i---------i---------i --i --i--
45 -- - -------i-- -------i-- --+---------+-------i-- -- -- --i--
w 40 -- ---T-------T- -T- -' --'----T--'r-------T--r--------T--r--'r--'--
3 35
0
a 30 -- +--r--i---i--+--+--i---i--+--+--+--i---i--+--+--i---i--+--r--+--i--
i
25--i-----------i-------i--i---------i---------i --i --i--
1 -- L--1---�-- L -- L-----�-- L -- 1 --L-----�-- 1 -- L-----�-- 1 -- L --L --�--
20
15 -- r-- r- -r------r--r---- r--T--r--r----T--r
---------r--r----
10
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

Sand Filter - Oldcastle Stormcapture Type/1 24-hr 10-yr Rainfall=5.16"
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 23
Summary for Link 16L: Post Analysis Point 1
Inflow Area = 7.210 ac, 0.00% Impervious, Inflow Depth = 3.35" for 10-yr event
Inflow = 18.94 cfs @ 12.21 hrs, Volume= 2.013 of
Primary = 18.94 cfs @ 12.21 hrs, Volume= 2.013 af, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Link 16L: Post Analysis Point 1
Hydrograph
I
----
I
--
--r--Ir--li--
--r--r--li--y--T--r--Ir--li--+--r--li---li--rt--r--r--li--
■ Inflow
21
I-�--T--I---
I-�--T--,
I-�--T--r--�- � �
� -�--I- _
■ Primary
zo
18.94
cfs
�-r--I---
----------
-------------
-Inf!f��w �
' ��
19
--'
-
-------'--
--+-----'--
--+-
-
--
18-
17
--
-
--r-------
--r--
---- --T--
-------T--r------- -
-r-- ----
16
-
- -
-
- -
-
- - - -
- - -
15
-I'
1--L--1---'--
--+--'---'--L--L--L-------L--L-------L--L--L--'--
14
--
--r-----I--
--+-----I--
--+--+-------+--r-----------r--+--I--
13
--
-- --
Y--
- - - --
--
-I
--,-- - - - I -- --,-- - - - I -- --
, --, --I--
w12
--
-------
-------------------------------------------------
V 11
I
_�
I I I
1--L--1---1--L--L--'---'--J--1--L--1---'--+--L--1---1--L--L--L--'--
I I
I
I I I
I
I I I I I I I I
I I I
10
2-0
--
+--+--+-+--+--+--+-+--+--+--+--+-+--+--+----+--+--+--+-+--
LL 9
8
- -
-
- -
-
- - - -
- -
7
1--L--1---1--L--L--'---'--J--1--L--1-----+--L--1---1--L--L--L--'--
6
--
+--+--+-+--+--+--+-+--+--+--+--+-+--+--+----+--+--+--+--I--
5
--
7--r-----II--
T--
T--II
---II--T--
T--r
--- - -II-- T-- r------T--r--Ir
-
--II--
4
- - -
-
- -
-
- - - -
- -
3-I--
--
-- --
---------
-- ---
--- --------- -----;---
-- ---
2
1
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

Sand Filter - Oldcastle Stormcapture Type/1 24-hr 10-yr Rainfall=5.16"
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 24
Summary for Link 17L: Pre Analysis Point 1
Inflow Area = 6.300 ac, 0.00% Impervious, Inflow Depth = 3.22" for 10-yr event
Inflow = 18.36 cfs @ 12.22 hrs, Volume= 1.692 of
Primary = 18.36 cfs @ 12.22 hrs, Volume= 1.692 af, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Link 17L: Pre Analysis Point 1
Hydrograph
--------
--
----------
---------- --------- ---------
■Inflow
20
■ Primary
19
18.36
cfs
18
17
--
--
-+--+-------+--+-------+--+--+-------+--+-------+--+--+----
-
--T-------
--T-------
--T--T-------T--T-------
--T--T----
16
- -
-
- -
-
- - - - - -
15
14
1--L--1---1--1--L--1---1--J--1--L--1---1--1--
--1---1--1--L--+--'--
13
--
+--+-------+--+-------+--+--+-------+--+-------+--+--+----
w 12
--
T--T--Ir--li--
--T--T----T--T--T--Ir--li--+--T--li---li--T--T--T--li--
u 11
' �
--I
--T-----i--
--T--T--i--
--T--
-------T--T-----i-- --T-- --i--
3 90
a-
8
_
1--L--1---1--1--
--1---1--J--1--
--1---1--1----1---1--1--L-- --'--
7
--
T--T--Ir--li--
--T--T----T--T--T--Ir--li--+--T--li---li--T--T--T--li--
6
- -
T - - T - -1 - -
-II - - -T
T -
-II - - - - T -
- T
- - T - - - - - - - T - - T - - - - - - - T - - T-
5
- -
-
- -
-
- - - - - -
4
3
-L-----'--
--L--1---1--J--1--L--1---1--1--L--1-----1--L--L--'--
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

Sand Filter - Oldcastle Stormcapture Type/1 24-hr 10-yr Rainfall=5.16"
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 25
Summary for Link 18L: Post Analysis Point 2
Inflow Area = 18.310 ac, 0.00% Impervious, Inflow Depth = 2.83" for 10-yr event
Inflow = 50.67 cfs @ 12.10 hrs, Volume= 4.319 of
Primary = 50.67 cfs @ 12.10 hrs, Volume= 4.319 af, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Link 18L: Post Analysis Point 2
Hydrograph
■ Inflow
55
50.67
'--'
I I I I I I
-L--1---1--L-------'-- --+---------+--L--1---1--L--L--L--'--
cfs Inflow area=j &3'� O'�Iaq
� �
[I Primary
so
-?--'---I---I-- �I--�� I I I I I I I I I
45
--- T-- T-- li---li----T--T--li----T--T--li---li--T--T--Ir--li----T--T--li--
40
,' I
I I I I I I I I I I I I I I I I I I I I I I
-- -+--+--+-+--+--+--+-+--+--+--+--+-+--+--+----+--+--+--+-+--
35
y
30
I I I I I I I I I I I I I I I I I I I I I
- - -
3
o
a 25
,
�
I I I I I I I I I I I I I I I I I I I I I
--I +--r--I---I--+--+--I---I--+--+--+--I---I--+--+--I---I--+--r--+--I--
20
- L--L--'---'--L--L--'---'--L--L--L--'---'--+--L--'---'--L--L--L--'--
I
I I I I I I I I I I I I I I I I I I I I I I
10
----T------- --T-- ---- --T---------T--T-------T--T--F----
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

Sand Filter - Oldcastle Stormcapture Type/1 24-hr 10-yr Rainfall=5.16"
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 26
Summary for Link 19L: Post Analysis Point 3 (Hawkstone Culvert U/S)
Inflow Area = 21.710 ac, 0.00% Impervious, Inflow Depth = 2.81" for 10-yr event
Inflow = 61.94 cfs @ 12.07 hrs, Volume= 5.075 of
Primary = 61.94 cfs @ 12.07 hrs, Volume= 5.075 af, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Link 19L: Post Analysis Point 3 (Hawkstone Culvert U/S)
Hydrograph
------'-- -------'-- -- -------'-- -------'-- -- -- --'--
■ Inflow
I r I
❑ Primary
cfs
65
' 61.94
I� ow Arl,6a= 1 T7 01a-
55
50
Y--r--r--i-- r--r--i-- t--r-------Y--r-------Y--r--r--i--
II--�II--� II II II--�
45
--
- --I---I-- --�--I---I-- --�--I---I-- --�--I---I-- --� --I--
40y
1-L-L-L--'--
I I I I I I I I
U
35
--
-+--r--i---i--+--+--i---i--+--+--+--i---i--+--+--i---i--+--r--+--I--
o
25
20
--
+--r-------+--+-------+--+--+-------+--+-------+--r--+--I--
1 1
--'
1--L--'---'--1--L--'---'--1--1--L----J--1--L-------1--L--L--'--
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

Sand Filter - Oldcastle Stormcapture Type/1 24-hr 10-yr Rainfall=5.16"
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 27
Summary for Link 21 L: Post Analysis Point 4 (Hawkstone Culvert D/S)
Inflow Area = 22.410 ac, 0.00% Impervious, Inflow Depth = 2.79" for 10-yr event
Inflow = 63.16 cfs @ 12.06 hrs, Volume= 5.210 of
Primary = 63.16 cfs @ 12.06 hrs, Volume= 5.210 af, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Link 21 L: Post Analysis Point 4 (Hawkstone Culvert D/S)
Hydrograph
70 ■ Inflow
-r--�---�--r--r--r--�--r--r--r--�---�--r--r--�---�--r--r--r-T- 0 Primary
65 - 63.16 cfs I I I I I I I I I I � I I I I I
_ fO DW 1 rea= T Waq -
60
55 -- ---r-------r- -r-- ------T--r------- T--r---------r--r----
--' -1--L--'---'--------'---'--------T----J-------------------T--'--
50
45 -- -+--r--r----+--+--r----+--+--r--r----+--r-------+--r--r--i--
40
i
--' -1--L--1---'--1--L--1---1--J--1--L--1-----1--L--1-----1--L--r--'--
0
LL 30 -- r--r--r--i--r--r--r--i--r--T--r--r--i--T--r--r--i--r--r--r--i--
25
--' r--r--'---'--r--L--L--1--J--1--L--1--J--1--L--1-----r--r--r--'--
15 ----r--r--i----r--r--i----T--r--r----T--r--r--i----r--r--i--
10
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

Sand Filter - Oldcastle Stormcapture Type 11 24-hr 25-yr Rainfall=6.16"
Prepared by {enter your company name here} Printed 2/12/2020
HvdroCAD® 10.00-24 s/n 10182 © 2018 HvdroCAD Software Solutions LLC Paae 28
Time span=0.00-120.00 hrs, dt=0.05 hrs, 2401 points
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN
Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method
Subcatchment 1 S: Pre Project Site Runoff Area=0.220 ac 0.00% Impervious Runoff Depth=3.62"
Tc=18.0 min CN=77 Runoff=0.93 cfs 0.066 of
Subcatchment2S: Post Project Site to SF Runoff Area=1.010 ac 0.00% Impervious Runoff Depth=5.11"
Tc=5.0 min CN=91 Runoff=8.46 cfs 0.430 of
Subcatchment6S: Pre Dev Subarea 1 Runoff Area=6.300 ac 0.00% Impervious Runoff Depth=4.13"
Tc=28.0 min CN=82 Runoff=23.46 cfs 2.171 of
Subcatchment7S: Pre Dev Sub Area 2 Runoff Area=11.900 ac 0.00% Impervious Runoff Depth=3.32"
Tc=16.0 min CN=74 Runoff=49.16 cfs 3.292 of
Subcatchment8S: Pre Dev Subarea 3 Runoff Area=3.600 ac 0.00% Impervious Runoff Depth=3.52"
Tc=10.0 min CN=76 Runoff=19.11 cfs 1.056 of
Subcatchment 11 S: Pre-Dev Sub Area 4 Runoff Area=0.700 ac 0.00% Impervious Runoff Depth=3.12"
Tc=5.0 min CN=72 Runoff=3.93 cfs 0.182 of
Subcatchment 13S: Post Dev Sub Area 2 Runoff Area=11.100 ac 0.00% Impervious Runoff Depth=3.32"
Tc=16.0 min CN=74 Runoff=45.85 cfs 3.071 of
Subcatchment 14S: Post Dev Subarea 3 Runoff Area=3.400 ac 0.00% Impervious Runoff Depth=3.52"
Tc=10.0 min CN=76 Runoff=18.05 cfs 0.997 of
Subcatchment 15S: Post-Dev Sub Area 4 Runoff Area=0.700 ac 0.00% Impervious Runoff Depth=3.12"
Tc=5.0 min CN=72 Runoff=3.93 cfs 0.182 of
Subcatchment20S: Post Dev Subarea 1 Runoff Area=6.200 ac 0.00% Impervious Runoff Depth=4.13"
Tc=28.0 min CN=82 Runoff=23.09 cfs 2.136 of
Pond 5P: Sand Filter Peak Elev=656.81' Storage=0.061 of Inflow=8.46 cfs 0.430 of
Outflow=8.34 cfs 0.430 of
Link 9L: Pre Analysis Point 2 Inflow=68.18 cfs 5.463 of
Primary=68.18 cfs 5.463 of
Link 10L: Pre Analysis Point 3 (Hawkstone Culvert U/S)
Link 12L: Pre Analysis Point 4 (Hawkstone Culvert D/S)
Link 16L: Post Analysis Point 1
Link 17L: Pre Analysis Point 1
Inflow=82.67 cfs
6.518 of
Primary=82.67 cfs
6.518 of
Inflow=84.06 cfs
6.701 of
Primary=84.06 cfs
6.701 of
Inflow=24.16 cfs
2.567 of
Primary=24.16 cfs
2.567 of
Inflow=23.46 cfs
2.171 of
Primary=23.46 cfs
2.171 of

Sand Filter - Oldcastle Stormcapture Type 11 24-hr 25-yr Rainfall=6.16"
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 29
Link 18L: Post Analysis Point 2 Inflow=66.67 cfs 5.638 of
Primary=66.67 cfs 5.638 of
Link 19L: Post Analysis Point 3 (Hawkstone Culvert U/S) Inflow=81.55 cfs 6.634 of
Primary=81.55 cfs 6.634 of
Link 21 L: Post Analysis Point 4 (Hawkstone Culvert D/S) Inflow=83.20 cfs 6.817 of
Primary=83.20 cfs 6.817 of
Total Runoff Area = 45.130 ac Runoff Volume = 13.584 of Average Runoff Depth = 3.61"
100.00% Pervious = 45.130 ac 0.00% Impervious = 0.000 ac

Sand Filter - Oldcastle Stormcapture Type 11 24-hr 25-yr Rainfall=6.16"
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 30
Summary for Subcatchment 1S: Pre Project Site
Runoff = 0.93 cfs @ 12.10 hrs, Volume= 0.066 af, Depth= 3.62"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Type II 24-hr 25-yr Rainfall=6.16"
Area (ac) CN Description
0.220 77
0.220 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
18.0 Direct Entry,
Subcatchment 1S: Pre Project Site
Hydrograph
--'---'------------------'-------I--'- -----------------------------
1 � � � � � � � � � � � � � � � � �- ❑Runoff
0.93 cfs
; ;Type II'; 24-h';r
257 r RainfallT6.�16';7
RWnbff Awea=0.220 at,
;R0nOff';VQIL;me=',0.06$ clf
R6noff Depth=�3.62��"
Tc=18.'0 M i h
PN=77
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

Sand Filter - Oldcastle Stormcapture Type 11 24-hr 25-yr Rainfall=6.16"
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 31
Summary for Subcatchment 2S: Post Project Site to SF
[49] Hint: Tc<2dt may require smaller dt
Runoff = 8.46 cfs @ 11.95 hrs, Volume= 0.430 af, Depth= 5.11"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Type II 24-hr 25-yr Rainfall=6.16"
Area (ac) CN Description
1.010 91
1.010 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
Subcatchment 2S: Post Project Site to SF
Hydrograph
I 1 I 1 - - - - - -
. I - - ■Runoff
rrr1l 1-1rrrrr1-1- 1 --r -- 1 1 1 1
9 846 cfs
T-- T - -T --' T ---- T --T ----- TYpe]t''1-3 fir-
-- --'1-- --rt----------'1----rt--t--r--'r--215,-Rainfa fl=TlBA6"-
Runbffl Awea=1.010 at
6 RqnOff'1VQIqm'1e='10.430f
5 Ru'lnoff Depth=�5.'111;"
i-- --' J--1--1--L-- --'1 1
LL I TC 15.1fi 1'ift
4 1
3 �1
--'------ -'---'--------------'---'-----------------'---' --'---'---'---'---'--
2
IL i
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

Sand Filter - Oldcastle Stormcapture Type 11 24-hr 25-yr Rainfall=6.16"
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 32
Summary for Subcatchment 6S: Pre Dev Subarea 1
Runoff = 23.46 cfs @ 12.21 hrs, Volume= 2.171 af, Depth= 4.13"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Type II 24-hr 25-yr Rainfall=6.16"
Area (ac) CN Description
6.300 82
6.300 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
28.0 Direct Entry,
Subcatchment 6S: Pre Dev Subarea 1
Hydrograph
------------L--L----1---1---1--J--1--L--L--L----1---1--J--L--L--L-- --
26--------------Ir--Ir - -r--------------- -Ir --r--------------Ir --Ir -- ■Runoff
25 23.46 cfs -- -- ------------ -- -- -- -- --------- -- -- -- -- --
24 r-- r--r --r - -r---- - - -r -- r -- r -- r --r --r---- - - -r -- rr -- r -- --r --
23 ---- --- ----L--r---------- -- ----+--r-------�C"_N+2-p�' _
22 --i - -i-- -- r -- r -- --i-----i---- -- -- r -- --i --i --I 21 --I-----1--+--r--r---------- -- ----+--25, -Rai_nfafh6.16"`-
20 --'-- -'-- -- -- -------------'-- -- -- --- - - -- - - --
19 --I-- -----r--r--r------------r--r-= - rn�if-Aker=O�c-- 18 --'-- -'-- -- -- -------------'-- -- -
17
w 15 --r- ---r--r--r--r--r-------r--r--r--t--r--r--r----r--r--r--r--r--
u 14 --'-- -'-- -- -- -------------'--L-- I--F�t�t�&WDeptlr=4.'�'F3"--
3 13 --I---r--r--r--r--r--r----r--r--r--r--r--r--I---I--r--r--r--fir.,-�-yr�--
a 12 --'i-----LI--LI'i --'i --'i - -'i-------------
--- -i --'i --'i----- 'iTd�2-8.i lillih
11 --r----r--r--r--r--r--r----r--r--r--r--r--r--r--I- r--r--r--r--r--
10 --'i-- -'i-- ---L L--r--1---1---1--J--1--1--1--L--L--1---1--J--1- wj=�
i I ■7
9 --I---I--r--r--r--r--r-- I - - - I - - r-- r-- r-- r--r--r-- I --- I
-
-r--r-- r- -
8 --'-- -'--L--L--L--L--1---1---1--J--1--L--L--L--L-------L--L--L--L--r--
i -- -- -----1I --I ----rL----1i-_-_-1r----
-I--_-_-1_-_-L_-_-L_-_-L------1---I1--rJ--rL--L--L----
1--rJrrTrr__r--I--r_r-r__rL6 --
r- I--r__r__r--r
4 ---- --- ----L--r---------- -- -- -- --r--------- -- -- --L-- --
3 --i-- r-- r -- r --r --r --r-- i--- i --r -- r -- r -- r --r --r-- i--- i --r -- r -- r --r --r __
2 ---- - ----L--r---------- -- -- -- --r--------- -- -- --L-- --
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

Sand Filter - Oldcastle Stormcapture Type 11 24-hr 25-yr Rainfall=6.16"
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 33
Summary for Subcatchment 7S: Pre Dev Sub Area 2
Runoff = 49.16 cfs @ 12.08 hrs, Volume= 3.292 af, Depth= 3.32"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Type II 24-hr 25-yr Rainfall=6.16"
Area (ac) CN Description
11.900 74
11.900 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
16.0 Direct Entry,
Subcatchment 7S: Pre Dev Sub Area 2
Hydrograph
55 ■Runoff
49.16 cfs -- - - - - -- -- -- - -- -- -
so Type1172-4-hr_-
45 --'---------' --'-----------------' 25ryrRai_nfaIIT1
6.�16�"--
40 Rudloff Arda=11.900 arc
--r- -i--r--r--r--r--r--i---i--r--r--r--t--r--r--r--i--r--r--r--r--r--
35 ;RL; n pff; VQ I L; m';e='13.292 elf
30Runoff Depth=�3.32';,,
25 Td=16.'0 M i h
20 PN=74
15
------ -- --i --i------------- -- -- --i------------- -- --i --i --
10
5
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

Sand Filter - Oldcastle Stormcapture Type 11 24-hr 25-yr Rainfall=6.16"
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 34
Summary for Subcatchment 8S: Pre Dev Subarea 3
Runoff = 19.11 cfs @ 12.01 hrs, Volume= 1.056 af, Depth= 3.52"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Type II 24-hr 25-yr Rainfall=6.16"
Area (ac) CN Description
3.600 76
3.600 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
10.0 Direct Entry,
Subcatchment 8S: Pre Dev Subarea 3
Hydrograph
21--1--L----1---1---1--J--1--1--L--L--L-------J----1--L--L-- ■Runoff
20 19.11 cfs -- -- ------------ -- -- -- -- --------- -- -- -- -- --
19 --I-- - ------rt----r----r--------------------- � 14-hr--
-
ITTTT� I�T-b-#f-"2
T--T-T-r-r--I---�-7-T-r-F18 n-- w';A
16 --'--'-------I I I
p------
--
15 IIIlI I I I I I IlI I II I II AiI re I 3I.6I 0 I a�bI
-
14 --r---r-----+-- +--+p e=13 --r--r-- -1--,-TunQ'�'�-`F'--
w 12 --II-- --- ---- Ir--I------
T--T--------il--- - -
'-- ' --' --'--'---'---'---'-- ' -- ' -- --Runoff D"th= 11. 2fF1yy-��--
UZ
9 -1- -i-- -- -- ----------i-- -- -- --+-- -------i-- -- --+-- -- --
I I I I I I I I I I I I I I I I I I I I
8 --I-----r--r--r--r--r--r----r--r--r--r--r--r-------r--r- �� -
7 --II-- -------Ir--IT--T----------------IT--T------------T--Ir--T--
6 j--'-- -'---- --' --'-----------'-- -- --' --'-----------'-- --' --' --'---
5--'------1--L----'---'---'----+--+--L--L-------------1--L--�--
4 j ---- --- -- -- ------------ -- -- -- -- --------- -- -- -- -- --
3 ------+--+--+--+---------+--+--+--+--+--+-------+--+--+--+--+--
2 I I
-�i7--r--r--I---r--I-7--1--T--r--r--r--I--r--�--T--r--r--
1
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

Sand Filter - Oldcastle Stormcapture Type 11 24-hr 25-yr Rainfall=6.16"
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 35
Summary for Subcatchment 11S: Pre-Dev Sub Area 4
[49] Hint: Tc<2dt may require smaller dt
Runoff = 3.93 cfs @ 11.96 hrs, Volume= 0.182 af, Depth= 3.12"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Type II 24-hr 25-yr Rainfall=6.16"
Area (ac) CN Description
0.700 72
0.700 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
Subcatchment 11S: Pre-Dev Sub Area 4
Hydrograph
I I I I I I I I I I I I I I I I I I I I I I I 1 ■Runoff
--1--1--1---1---1--J--1--1--L--L--1---1---1--L L--------'--
3.93 cfs I I I I I I I I I I I I I I I I I I 1
4 Type 111124-h'1r
25ryr RainfallT6.116��"
' --'-
3 1 1 1 1 1 1 1 1 1 1 1 1 1 1 I 1 1 I I I I 1
�RL;npff'�1VQIL;me='10.18� clf
V I I I I I I I I I I I I I
Runoff ��1Depth=�3.�12��"
0 2 TcT5.0 fnih
LL I I I I I I I I I I I I I I I I I
CAN=7g
--r---1--t--t--r--r--1---1--t--t--t--r--r--- ---1--t--r--r--r--1---1--
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

Sand Filter - Oldcastle Stormcapture Type 11 24-hr 25-yr Rainfall=6.16"
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 36
Summary for Subcatchment 13S: Post Dev Sub Area 2
Runoff = 45.85 cfs @ 12.08 hrs, Volume= 3.071 af, Depth= 3.32"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Type II 24-hr 25-yr Rainfall=6.16"
Area (ac) CN Description
11.100 74
11.100 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
16.0 Direct Entry,
Subcatchment 13S: Post Dev Sub Area 2
Hydrograph
50
48
-,--+--r--r--I
--1--L--
45.85 cfs ;--
--r--r----------=--
--1---1---1--J--1--1--L--L--L-------J--
---------7--7--+--T--r-------1--I--+--r--�--
--
--1--L--L--
----- r-- 'r - - ---I --;;-ry-7--r---j'rp--
■Runoff
44
---- ---,--
--r--r----------
--
--
--T--r--r-- ---T-"-LJ7Z4�u�--
42
--'-- -'- -J--1--L--L--1---1---1--J--1--1--1--L--L--'---'-
.J- 1--1--L--L
nC p w c Ac
25r! Rainfall;;"6i��--
40
'
--r- -i--r--+--r--r--r--i---i--r--r--r--+--
i
38
36
--'-- -'-- --
--Ir--li-----7--------Ir--Ir--li---------
--
--
-----------'--
--
--------------------------------
p
Ruh Off Y"''tr6&4 1,400-at -
34
32
--'---'---'---'--'---'-----------------------------'---
--'---'--y--rt--t--r--'r-------
y--
rt-
--------------'---
- rtR-pnp fl- pIp1 e=1.0-71-cjf -
U 28
j
---- -----+--r--r----------
--r--r--+--Runoffbepth=113T-=
------
------------
p 24
--i-----1--+--+--r----------------+--r--+--i--
li xx ++//��
LL22
20
____--------------------------------------
--r-- i--r--+--r--r--r--i---i--r--r--r--+--r--r--r--i--r--
r-- r ,�
18
--,-- -,-- --
-----------------,--
--
--------------------rN=�# -
16
14
j----
--+- +--+--+--+--+--+--+-+--+--+--+--+--+--+--+-+--+--+--+--+--+--
--- --
--
--
-------------
--
-- --------------- -- -- -----
12
--------+-------------------+---------------+----�--
8
---- --- --+--
--
----------
--
--
--+-- --------- -- --+-- -- --
4
--'-- -- --+--
--
--------'--
--
--
--+-- -------'-- -- --+-- -- --
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

Sand Filter - Oldcastle Stormcapture Type 11 24-hr 25-yr Rainfall=6.16"
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 37
Summary for Subcatchment 14S: Post Dev Subarea 3
Runoff = 18.05 cfs @ 12.01 hrs, Volume= 0.997 af, Depth= 3.52"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Type II 24-hr 25-yr Rainfall=6.16"
Area (ac) CN Description
3.400 76
3.400 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
10.0 Direct Entry,
Subcatchment 14S: Post Dev Subarea 3
Hydrograph
--�---�---�--�--1--L--�--1---1---1--J--1--1--1--L--L--1---1--J--1--1--L--�--
20----------+--+--+--+----------+--+--+--+--+--+-------+--+--+--+--+-- ■Runoff
19 18.05 cfsr--r--r-------r--r--r--t--r--r-- ----+--
18 --r--r-- ---
Ty"-Hr34r--h- ri--
-
17 - -i ----rr--rrrrrrr-- r--rr- r--I----- r-- r--r-
16 nnyR-nIF�cc-1r-6 r--r--r-rr--r--T-
rn-
-
L� •Ifa.
'15 r- -r - -r- r--r--,Rwnbf-Awee=3.400 at -
14 ---- ---- -- -- --------------- -- -------------------------------
13 ---- --- -------------------,-- -- Rpnpff-VpIgm,e=0."
12 --'-- -'---'---'--'---'---'---'---'---'---'----------------------------------
3 10 --'-- -'----1--L--r--1---1---1--J--1--1--1--L--+-----'- J--
a9 -1- -'----1--L--r--1---1---1--J--1--1--1--L-- -----=�11.V- ��--
8 ---- --- ----r--r---------- -- -- -- --r--------- -- - r y►
7----------r--r-----------------r---------r---►���V
6 j------+--+--+--+---------+--+--+--+--+--+-------+--+--+--+--+--
5 ------+--+--+--+---------+--+--+--+--+--+-------+--+--+--+--+--
4
3
r--r-- r--r--r--i---i--r- -r- r--T--r--r--i---i--r--r--r--r--r--
2 '
i r--r--r--r--i--i i--r--r--r--T--r--r--r i--r--r--r--r--r--
1
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

Sand Filter - Oldcastle Stormcapture Type 11 24-hr 25-yr Rainfall=6.16"
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 38
Summary for Subcatchment 15S: Post-Dev Sub Area 4
[49] Hint: Tc<2dt may require smaller dt
Runoff = 3.93 cfs @ 11.96 hrs, Volume= 0.182 af, Depth= 3.12"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Type II 24-hr 25-yr Rainfall=6.16"
Area (ac) CN Description
0.700 72
0.700 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.0 Direct Entry,
Subcatchment 15S: Post-Dev Sub Area 4
Hydrograph
I I I I I I I I I I I I I I I I I I I I I I I 1 ■Runoff
3.93 cfs
4 Type 11124-h'1r
25ryr RainfallT6.116��"
' --'-
3 1 1 1 1 1 1 1 1 1 1 1 1 1 1 I 1 1 I I I I 1
�Rt;npff'�1VQIL;me='10.18� cif
V I I I I I I I I I I I I I
Runoff ��1Depth=�3.�12��"
0 2 TcT5.0 fnih
LL I I I I I I I I I I I I I I I I I
CAN=79
--r---1--t--t--r--r--1---1--t--t--t--r--r--- ---1--t--r--r--r--1---1--
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

Sand Filter - Oldcastle Stormcapture Type 11 24-hr 25-yr Rainfall=6.16"
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 39
Summary for Subcatchment 20S: Post Dev Subarea 1
Runoff = 23.09 cfs @ 12.21 hrs, Volume= 2.136 af, Depth= 4.13"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Type II 24-hr 25-yr Rainfall=6.16"
Area (ac) CN Description
6.200 82
6.200 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
28.0 Direct Entry,
Subcatchment 20S: Post Dev Subarea 1
Hydrograph
25-- -- --li --i--------li-- -- -- -- --i--------li-- -- -- --li -- ■Runoff
24 23.09 cfs -- --+-------+-+-- -- -- --+-- ----+-+--1]--+--+--+-- --
23 --,-- -,----?-----------------li--?--?-------------i�i -11I - -h�-
22 --+- +--+--+--+--+--+--+-+--+--+--+--+--+--+--+-pi-
19 ----
18 ' --'-- -'----+--+----'---'---'--+--+--+--=R-lrtbffAire&6.200 ad-
17 --,-- -,-_'''16 __ 4_-4R np f+V-pltme=2-13$ 1 _
w14 ---------?-------------------?--?----------------------------
o12 --+----+--+--+--+-----+-+--+--+--+--+--+--+--+- -
- -- ----- ----
10 --+-+--+--+--+--+--+--+----+--+--+--+--+--+--+----+--+- +
' PW_�Z -
8 --i-- -i-- -- --+----------i-- -- -- --+-- -------i-- ----+--+-- --
7 -- -- -- i -- i — r
6 --+- -i--+--+--+--+--i---+--i--+--+--+--+--+--+--+--i--+--+--+--+--+--
4 --+- -i--+--+--+--+--i---+--i--+--+--+--+--+--+--+--i--+--+--+--+--+--
2 ---- - -- --+------------ -- -- --+-- --------- ----+--+-- --
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

Sand Filter - Oldcastle Stormcapture Type 11 24-hr 25-yr Rainfall=6.16"
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 40
Summary for Pond 5P: Sand Filter
Inflow Area = 1.010 ac, 0.00% Impervious, Inflow Depth = 5.11" for 25-yr event
Inflow = 8.46 cfs @ 11.95 hrs, Volume= 0.430 of
Outflow = 8.34 cfs @ 11.96 hrs, Volume= 0.430 af, Atten= 1 %, Lag= 0.4 min
Primary = 8.34 cfs @ 11.96 hrs, Volume= 0.430 of
Routing by Stor-Ind method, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Peak Elev= 656.81' @ 11.96 hrs Surf.Area= 0.000 ac Storage= 0.061 of
Plug -Flow detention time= 247.9 min calculated for 0.430 of (100% of inflow)
Center -of -Mass det. time= 247.7 min ( 1,023.6 - 775.9 )
Volume Invert Avail.Storage Storage Description
#1 652.50' 0.063 of Custom Stage Data Listed below
Elevation Cum.Store
(feet) (acre-feet)
652.50 0.000
653.00 0.007
654.00 0.021
655.00 0.035
656.30 0.054
657.00 0.063
Device
Routing
Invert
Outlet Devices
#1
Primary
651.00'
18.0" Round RCP -Round 18"
L= 20.1' RCP, square edge headwall, Ke= 0.500
Inlet / Outlet Invert= 651.00' / 650.40' S= 0.0299 '/' Cc= 0.900
n= 0.013, Flow Area= 1.77 sf
#2
Device 1
652.50'
Special & User -Defined
Head (feet) 0.00 0.50 1.50 2.50 3.80 4.50
Disch. (cfs) 0.000 0.010 0.015 0.020 0.026 0.030
#3
Device 1
656.30'
Custom Weir/Orifice, Cv= 2.62 (C= 3.28)
Head (feet) 0.00 1.00
Width (feet) 7.00 7.00
Primary OutFlow Max=8.17 cfs @ 11.96 hrs HW=656.80' (Free Discharge)
L1=RCP_Round 18" (Passes 8.17 cfs of 19.12 cfs potential flow)
�__2=Special & User -Defined (Custom Controls 0.03 cfs)
3=Custom Weir/Orifice (Weir Controls 8.14 cfs @ 2.32 fps)

Sand Filter - Oldcastle Stormcapture Type 11 24-hr 25-yr Rainfall=6.16"
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 41
Pond 5P: Sand Filter
Hydrograph
--�-- �-- �--��---��---��-- ��--�---��-- ��-- �---�---��---��-- ��--�---��-- ��-- �---��---�I---�I-- �I -- ■ Inflow
8.46 cfS ❑ Primary
9 8.34 cfs T- -'I- - -'I- - -'I - - - - -'I- - - - - - - f In#OW -Area =1:'�101-0 lac--
1I I I I I I I I I I I I I I I I I I I I
7 ��
------------- ----------------ASto-r`ageT-0116VVolof -
6
y I I I I I I I I I I I I I I I I I I I I I
5
pI I I I I I I I I I I I I I I I I I I I I
LL 4
3-
2-
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

Sand Filter - Oldcastle Stormcapture Type 11 24-hr 25-yr Rainfall=6.16"
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 42
Summary for Link 9L: Pre Analysis Point 2
Inflow Area = 18.200 ac, 0.00% Impervious, Inflow Depth = 3.60" for 25-yr event
Inflow = 68.18 cfs @ 12.11 hrs, Volume= 5.463 of
Primary = 68.18 cfs @ 12.11 hrs, Volume= 5.463 af, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Link 9L: Pre Analysis Point 2
Hydrograph
�r--��--
■ Inflow
75
-r--��---��--�--fi--��---��--�--t--�r--��---��--rt--r--��---��--rt
Primary
70
68.18
cfs----------
-----------,--;
nflow'recj=j- T2Q0'la -
65
60
55
i i
50
N
� I
40
LL
i
30
-- r--r--r--i--r--r--r--i--r--+--r--r--i--+--r--i---i--r--r--r--i--
25
20
----r-------
--r--
------+--r-------+--r-------
--r--r----
15
10
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

Sand Filter - Oldcastle Stormcapture Type 11 24-hr 25-yr Rainfall=6.16"
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 43
Summary for Link 10L: Pre Analysis Point 3 (Hawkstone Culvert U/S)
Inflow Area = 21.800 ac, 0.00% Impervious, Inflow Depth = 3.59" for 25-yr event
Inflow = 82.67 cfs @ 12.07 hrs, Volume= 6.518 of
Primary = 82.67 cfs @ 12.07 hrs, Volume= 6.518 af, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Link 10L: Pre Analysis Point 3 (Hawkstone Culvert U/S)
Hydrograph
Xi --1--T--T--r--I---I--T--r--1---I--T--T--r--I--1--T--r--1---1--7--r--r--I--
■ Inflow
-r--r--1--r--r--r--1--r--t--r--r--1--r--r--1---1--rt--rrr��--r--1-- Primary
82.67 cfs---r------- --r-- T-1 �DW AreA- 1T 1�Q1ac-
80
T
r 1
1 T
r 1
1 T
T
f
--I--
75
--I--
70
--I--
65
--
-rt--r--1r--1i--�--r--1r--1i--y--+--1r--1r--1i--+--r--1i---1i--rt--r--1r--1i--
60
--I--
H 55
+--r--r--1--+--+--r--1--+--+--r--1---1--+--r--1---1--+--r--r--1--
50
1
1
1
1 1
1 1
1 1
1 1
1
1 1
1 1
1 1
1 1
1
1 1
p 45
LL 40
�1
--
-rt--r--1r--1i----r--1r--1i--y--+--1r--1r--1i--+--r--1i---1i--rt--r--1r--1i--
35
'
+--+--1---1--+--+--1---1--+--+--+--1---1--+--+--1---1--+--+--+-_1--
30
1
1
1
1 1
1 1
1 1
1 1
1
1 1
1 1
1 1
1 1
1
1 1
25
20
1
1
1
1 1
1 1
1 1
1 1
1
1 1
1 1
1 1
1 1
1
1 1
15
1n
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

Sand Filter - Oldcastle Stormcapture Type 11 24-hr 25-yr Rainfall=6.16"
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 44
Summary for Link 12L: Pre Analysis Point 4 (Hawkstone Culvert D/S)
Inflow Area = 22.500 ac, 0.00% Impervious, Inflow Depth = 3.57" for 25-yr event
Inflow = 84.06 cfs @ 12.07 hrs, Volume= 6.701 of
Primary = 84.06 cfs @ 12.07 hrs, Volume= 6.701 af, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Link 12L: Pre Analysis Point 4 (Hawkstone Culvert D/S)
Hydrograph
�'---------------�-- -- --�-----�----------�-- --------- -- -----I -� M Inflow
� � � � ■Primary
84.06 cfs--- ----- --
85
- -
-1--L-------1--L-----'----1_!k11IlIUW �U�W - - UYV LdV
80
--
75
-1IL---I'1--1--IL-----I'-- --11--l'-----I'1--1--I-----I'1--1--IL--I' --I'--
70
65
-L--L--'---'--L--L--1---1--J--1--L--1-----1-- -------L--L--+--'--
60
-L--L-------L--L-------J--1--L-------+--L-------L--L--L--'--
H 55
V 50
0 45
--
-+--+-------+--+-------+--+--+-------+--+-------+--+--+----
a 40
L--L--I---I--L--L--I---I--J--1--L--I---'--+--L--'---'--L--L--L--'--
35
+--+-------+--+-------+--+--+-------+--+-------+--+--+----
30
L--L-------L--L-------J--1--L-------1--L-------L--L--L--'--
25
20
--
+--+--I---I--+--+-------+--+--+--+-+--+--+----+--+--+--+--I--
15
10
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

Sand Filter - Oldcastle Stormcapture Type 11 24-hr 25-yr Rainfall=6.16"
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 45
Summary for Link 16L: Post Analysis Point 1
Inflow Area = 7.210 ac, 0.00% Impervious, Inflow Depth = 4.27" for 25-yr event
Inflow = 24.16 cfs @ 12.21 hrs, Volume= 2.567 of
Primary = 24.16 cfs @ 12.21 hrs, Volume= 2.567 af, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Link 16L: Post Analysis Point 1
Hydrograph
,'
- 1 -- 1
-- L-----'--
-- L
-----'-- 1 --+--L
-------+-- L-----'-- 1 -- L --L --'--
■ Inflow
26
24.16
cfs
--I -
-+--+-+--+--+--+-+--+--+--+--+-+--+--+----+--+--+--+-+--
--r-------
--r--
---- -
�n�Q'IAr� =7
Ir� k--I �Qac-
[I Primary
24
T-
I T
I
I
I I
I I
I I
I I
I I
I I
I
I
I I I I
I I I I
I I I I I I I I I I I
I I I I I I I I I I I
20
'
--' 1--L--'---'--1--L--1---1--J--1--L-------+--L-------1--L--
--'--
18
I
-- +--+--+-+--+--+--+-+--+--+--+--+-+--+--+----+--+--+--+-+--
I I
I I
I
I I I I
I I I I I I I I I I I
16
y
--
I
--r-------
I I
I I
--r-------
I
--T--r-------7--r-------
I I I I
--r--r----
I I I I I I I I I I I
14
0
12
LL
-- 1--L--'---'--1--L--1---1--J--1--L-------+--L-------1--L--L--'--
10
-- +--+--+-+--+--+--+-+--+--+--+-------+--+-------+--+--+----
8
I
--
I I
--r-------
I I
I I
--r--
I
---- --T--
I I I I
-------T--r------- --r-- ----
I I I I I I I I I I I
6
-
'
--'
-L---------L-------L--
+
--------------------------------
2
0
0 5
10 15 20
25 30
35 40
45
50 55 60 65
70 75 80 85 90 95 100 105 110 115 120
Time (hours)

Sand Filter - Oldcastle Stormcapture Type 11 24-hr 25-yr Rainfall=6.16"
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 46
Summary for Link 17L: Pre Analysis Point 1
Inflow Area = 6.300 ac, 0.00% Impervious, Inflow Depth = 4.13" for 25-yr event
Inflow = 23.46 cfs @ 12.21 hrs, Volume= 2.171 of
Primary = 23.46 cfs @ 12.21 hrs, Volume= 2.171 af, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Link 17L: Pre Analysis Point 1
Hydrograph
I I I I I I I I I I I I I I I I I I I I
26 -
20-
■ Infow
23.46 cfs� Primary
24 Ore3�nf4�Cg�a
I I I I I I I I I I I I I I I I I I I I
I I I I I I I I I I I I I I I I I I I I
18 I I I I I I I I I I I I I I I I I I I I I
16 -- 1--L--1-----1--L--1---1--J--1--L--1-----1--L--1-----1--L-- ----
N
w �
u14 -- -------i-- -------i-- -- -------i-- -------i-- -- -- --i--
p12 -- rt--r--r------r--r----y--+--r--r----+--r-------rt--r--r--I--
LL I I I I I I I I I I I I I I I I I I I I I
i
10 -- --- -- --------- -- -- ---- -- -- ---- -- -- ---- -- -- -
,' I I I I I I I I I I I I I I I I I I I I I I I
q -- 1--L--1---'--1--L--1---1--J--1--L--1-----1--L--1-----1--L-- --'--
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

Sand Filter - Oldcastle Stormcapture Type 11 24-hr 25-yr Rainfall=6.16"
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 47
Summary for Link 18L: Post Analysis Point 2
Inflow Area = 18.310 ac, 0.00% Impervious, Inflow Depth = 3.69" for 25-yr event
Inflow = 66.67 cfs @ 12.10 hrs, Volume= 5.638 of
Primary = 66.67 cfs @ 12.10 hrs, Volume= 5.638 af, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Link 18L: Post Analysis Point 2
Hydrograph
- --- ----+--+-+--+--+--+-+--+--+--
■Inflow
70
66.67
cfs -------',-- i',--------',-- �',---, - - ----- ------ ----('`--
-- - -------'-- -------'--� -Inflow rea=1 &3j OI'+a-T -
❑Primary
65
55
50
45
_
u 40
-
0 35
30
25
20
15
WL
10
,
' ' ' ' ' ' ' ' ' ' ' ' ' ' '
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

Sand Filter - Oldcastle Stormcapture Type 11 24-hr 25-yr Rainfall=6.16"
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 48
Summary for Link 19L: Post Analysis Point 3 (Hawkstone Culvert U/S)
Inflow Area = 21.710 ac, 0.00% Impervious, Inflow Depth = 3.67" for 25-yr event
Inflow = 81.55 cfs @ 12.06 hrs, Volume= 6.634 of
Primary = 81.55 cfs @ 12.06 hrs, Volume= 6.634 af, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Link 19L: Post Analysis Point 3 (Hawkstone Culvert U/S)
Hydrograph
I I
- --�--
I I --
I -
I I I I
--�- ��
- I I I
--� -�--
I I I I I I I I
�� --�- -�-- �� - --� --�--
■ Inflow
90
� �
�
�
� �--
�
i �
10 Primary
85--
81.55
cfs
- -
----------------'-
-----'--
--
-----------�f��y�r-
---------------
--------------------
=Z1 71Q�r-
80
-- -
---------
--
--
-------
---------
--------- -- -- ----
75
�II
-- -
---------
--
--
-------
---------
--------- -- -- ----
70
-----I--
--T-----------r--T
65--r--r--T
T
-----I--
--T---------r--r
--T
60--r--r--T
T
55
y
T 50
--I__T--T__r--I---I--T--r--I---I--T--r--r--I--
3 45
0
a 40
-- -
r--r------
-r-
-r-
--------T--r------
-
T--r-------r--r--r--I--
35
--I
r--r--I---I--r--r--r--I--r--t--r--I--�--r--r--I---I--r--r--r--I--
30
--
r--r--I---I--r--r--r--I--r--r--r--I---I--r--r--I---I--r--r--r--I--
25
I
I I I
I I
I
I I I I
I I I
I I I I I I I I
20
--
+--r--I---I--+--+--I---I--+--+--r--I---I--+--r--I---I--+--r--r--I--
15
10
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)

Sand Filter - Oldcastle Stormcapture Type 11 24-hr 25-yr Rainfall=6.16"
Prepared by {enter your company name here} Printed 2/12/2020
HydroCAD® 10.00-24 s/n 10182 © 2018 HydroCAD Software Solutions LLC Page 49
Summary for Link 21 L: Post Analysis Point 4 (Hawkstone Culvert D/S)
Inflow Area = 22.410 ac, 0.00% Impervious, Inflow Depth = 3.65" for 25-yr event
Inflow = 83.20 cfs @ 12.06 hrs, Volume= 6.817 of
Primary = 83.20 cfs @ 12.06 hrs, Volume= 6.817 af, Atten= 0%, Lag= 0.0 min
Primary outflow = Inflow, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Link 21 L: Post Analysis Point 4 (Hawkstone Culvert D/S)
Hydrograph
----+--+--+--+-+--+--+--+-+--+--+--+--+-+--+--+--I---I--+--+--+--I--
■ Inflow
-+--+-+--+--+--I---I--+--+--+--+--I--+--+--I--+--+--+--+--I--
83.20 cfs ❑ Primary
85
_I rf�oy�r_rea-24'I+a_
80
75
70
,II
IIIIIIIIIIIIIIIIIIIII
65
60
I
I
I I I I I I I I I I I I I I I I I I I I I
H 55
u
I
I
+ + -----+--+-------+--+--+-----I--+ +-----I--+ + +--I--
I I I I I I I I I I I I I I I I I I I I I
50
45
0
--
-+--+--+-+--+--+--+-+--+--+--+--+-+--+--+--I--+--+--+--+--I--
LL 40
35
30
25
20
I
I
I I I I I I I I I I I I I I I I I I I I I
15
I
I
I I I I I I I I I I I I I I I I I I I I I
10
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120
Time (hours)