20241031_Figures_Calculations

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ENGINEERING & ENVIRONMENTAL SCIENCE COMPANY
3008 ANDERSON DRIVE.SUITE 102
RALEIGH.NC 27609
[phone]
October 29,2024
Mr. Steve Wyse
General Shale Brick, Inc.
300 Brick Plant Rd. ECE�vEp
Moncure, NC 27559
Re: Erosion Control Evaluation
Mine Permit Modification
Brickhaven Mine#2 Tract B UaNL QUALITY SECTION
Permit No.19-08
Chatham County,NC
Dear Mr. Wyse:
Engineering& Environmental Science Company (E2S) has completed the evaluation of the mine
permit modification for the above-referenced mine. Separately submitted are the mine maps and
application.
GENERAL PROJECT DISCUSSION
The Brickhaven Mine#2 Tract B (Permit No. 19-08)located in Chatham County,North Carolina,
contains 348 acres of permitted land (See Attachment, Vicinity Map). Currently, the permitted
allowable affected acreage is 144 acres. It is proposed to add an additional 117 acres of affected
acreage, for a total of 261 acres of allowable affected acreage. This additional acreage is located
within the mining permit limits, and no change to the total permitted area is proposed.
Mining will continue as permitted in the existing mine area,south of the Progress Energy easement
that bisects the site. Erosion control for the proposed new mining area will consist of twelve (12)
new sediment basins(Basins 1 through 12).Earthen berms will be constructed to divert stormwater
runoff to these basins.
(
After mining activities are complete, lakes will be formed, with exposed ground above the water
table sloped towards the lakes at a maximum slope of2:1 (11:V). Some of the haul roads will remain
in-place to include from SR-1924 to the current stockpile areas. The ditches for these roadways(if
present) are presently grassed and stable. The buildings or sheds will be removed. The 5'x'5
concrete riser structure and outlet pipe at existing Basin K will remain in-place.
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EVALUATION
In accordance with the USDA Soil Survey of Chatham County, Peawick (PeA and PeB) is the
predominant soil type at the site(See Figure 2), and is classified as Hydrologic Group D.
The SCS TR-55 Method was used to calculate the 2-year, 10-year,and 25-year rain events.Erosion
control for the proposed mining area will consist of sediment basins with a riseribarrel system with
skimmers attached to the riser pipes.The proposed corrugated metal riser pipes will have skimmers
attached 1 ft. above the base of pipe. The system will drain the basins over a period of 54.6 and
106.4 hours.
Perimeter berms will be used to divert the stormwater runoff to the basins. Trash racks will be
provided for the CMP riser pipes.For each basin,a 10' or 20' wide secondary spillway is provided.
The secondary spillway is only activated for rain events greater than the 2-year rain event. The
basins can pass the 25-yearrain event with one foot of freeboard.See Attachment B for calculations
for these basins.
CLOSURE
We appreciate serving General Shale Brick on this project. Please contact us if you have any
questions.
Sincerely,
CA R94
s tt ��•;•
T.Patrick Shillington,P. SM
President r IU72
USA
Attachment A: Figures 4V
Attachment B: Calculations ���lrNA O;.S......
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Attachment A:Tigures
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ENGINEERING&ENVIRONMENTAL
SCIENCE COMPANY
3008 ANDERSON DR.
N RALEIGH, SUITE 102
NORTH CARbLINA 27609
USGS Map °'111'
Brickhaven Mine#2 Tract B 0120121
Mine Permit No. 19-08 "°"'
Scale:1 2000' Chatham Co., NC 1

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Hydrological N
Soil Symbol Soil Name Group
Who While Store D
CcB Carbonlon C
MCC Matladoni C _ Scah t"=I000,
ENGINEERING&ENVIRONMENTAL
SCIENCE COMPANY
WhC While Store D
0083LEIGH,NORTH DR. SURE 102
PBS PeaWick pRALEIGH,NORTH CARbLINA 27669
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PeA Peawick D
UAi1:
Whit While Store D USDA Soil Survey 9128PI
Brickhaven Mine#2 Tract B
ChA Chewaaa C Mine Permit No. 19-08
UdC Udorlhenls B Chatham Co., NC 2

Pl-oposed Mine Expansion
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ENGINEERING 8 ENVIRONMENTAL
SCIENCE COMPANY
N g�JJ
(� 3999 ANDER90N DR. SUITE 192
RALEI'H,NORTH CARbLINA 27G09
(9191791-7799
P UATI.:
National Wetlands Inventory Map eaea,
Brlcichaven Mine#2 Tract B
Mine Permit No. 19-08 "°°"`"°
Scale: I"= 1000, Chatham Co., NC 3

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Attachment B: Calculations
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NOAA Atlas 14,Volmne 2,Vmslon 3
Location name:Moncure,North Carolina,USA'
Latlttlrie:35. Longitude:-79.0076"
Elevation:228 fl•-
'saurca:ESRIMaps
source:.USGS
POINT PRECIPITATION FREQUENCY ESTIMATES
G.M.Oannin,D.Medin,H.tin,T.Porcybok.M.Yaklo,and D.Riley
NOAA,National Weather Sorvire,Sliver Spring.Maryland
F tabula I PF graphical I Maps 8 aerials
PF tabular
PDS-based point precipitation frequency estimates with 90%confidence Intervals(in Inclles-
Average rocurrenc0 Interval(years)
Duration 1 2 6 10 2� 60 100 200 500 1000
=E171, 000r�
5 rnllt 0419 0.4fl2 0,569 0.029 O.G95 0.741 0.784 0.821 0.084 0.98
0.383-0A59 (0.450-0.641 .520.0.625) (0.573-0.689 0.630-0.760 0.670.0.811 0.705-0.857 0.735-0.899 (0.786.0.948) 0.789-0.984)
10-rnin 0.1".734 0.7208.806 0.033 O 1 00 11 0.91-1.10) (1.00 1i21 (1.07-1 29) 1 (IAA 153fi 1.&1.42) 1 (1.21 1.60) i.4.65
15-min 0.7 4-0ef7 0.951000 1.05�152G 1.181739) 127-1a64) 1.361.fi064 1.21.72 1A71480 1521Z08 1.58�94
30•Inilt 1.05-11.26 1.2fi179 1.501n80 1.02n02 109-228 2.042AB 2.1726 2.2 2600 (2A33.00 2,633.1E
4.20
3.32
60-In10 1.31 1357 1.67 iZOB 1.92 230 2:9 2.63 2513 03 2.83.34 2093.G3 3.13992 3AD 4330 9.94.E0
2•hY 1.1.621ee6 (1.842?24 2.272.7 (2.61-320 3.043873 3.374.16 3.9459 4.016.01) 4A26567 4.736603)
3.11r 1 Rp7897) 1.9G 2,30 2.42 2796 2.12.A2 3304 04 3.9 4?56 4.0755.08 4.47 6769 409 6332 5A 6792
G-11Y 1.95.2.35 2.352.03 2.13.52 3.84.09 9.98-0.64 4AB-5.47 4.86.10 6.4E-6.77 (6.1759 0.4-0.47
12-hr (282278) (2.93.3G 3A64.19) (4.03 459 (4.9S.84 5A18662 (G.03 7A5 6.87 8333 (7.54 9868 824 10.6
24-hY .743.16 3.323.81 4.(4.78) 4682.5.65 5.1-G.9 6.42 7.42 7.14 827 .87 9.16 8.87--10.4 9.6541.3
2•day 3.41 4.11 6.13 5. 33 7.02 7.00 0.7G 9.66 70.9 11.9
3.183.67 3.834.42 4.77-5.62 5.51.6.37 6.W7.53 7.27.8.46 0.08-9A0 8.07-10.4 996-11.7 10.8-12.8
3-day 3.61 4.34 5.30 18.21 7.34 8.23 9d4 10.1 11.4 12.4 I
9.363.87 4.054.66 5.01-5.78) 5.77-8.88 8.79-7.m) 7.59.8.82 (8.41-9.81 9.24-10.0 10.4-12.2) 11.3-13.3 f
4-day 3.551.9) 42 54.90 (5268.05 6.03 6995 .OB8.20 .90 9.19 (8675. 9.62-1.3) 1 11 2.7 11.743.8
7-clay 4.38 6.23 6.38 7.28 8.54 9.13 10.6 11.6 13.0 14.1
4.104.BB (4689.5.59 5.96.6.81 6.80-7.78 7.949.11 8.64-f0.2 (9.76-11.3 (10.7-12.4 (12.0-13.9 12.9-15.1 i
10-da 5.00 I _ _ Ad
4.705,94 5.59-6.35 (8.72-7684) (7.60-B.fiS -10.0_ (fl.8100.1d1.1) II _(10i5ib2.2 (111621b3.3) ro,u4 ( 31.777 -0-.198 0 p
20•dey 6.327A4 7A698.42 6.09?96 9687.7.2 11342.8 12,14.4.1 136-1.4 14.18•Y8.7 IBA-18.b 172-19.9
30-day 878588 9.2510.4 10.8-12.1 119?13.6 13.14-15.2 M
824.5
45-day 1 1a112 11'e13.2 13.515.1 140516.5 18b-3.4 190021.3 20.222.7 21.7324.E 22.926.0
60•day 1-2-.7--1 14.9 16.8 18.3 205 21.7 23.1 24.5 26.3 27.6
12.143A 14.1-15.7 16.0-17.7 117A.19.3 (19.2-21.4 20.522.9 21.9-24.4 23.1.26.9 24.7-27.0 25.929.2
Precipitation frequency(PF)estimates in this table ere based on frequency analysis or partial duration series(PDS).
Numbers In parenthesis are PF eslimales at lower and upper bounds of the 90%conrldence Interval.The probability that precipilalion frequency esllmales(for
a given duration and average recurrence Interval)will be greeter then the upper bound(or less than the lower bound)Is 5%.Estimates at upper bounds are not
checked against probable maximum precipitation(PMP)estimates and may be higher than currently valid PMP values.
Please prier to NOAAAUes 14 document for more Information.
Back to To_
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PF graphical
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Anti-Flotation Calculations for Basins
General Shale-Bylckhave Mine#2 Tract B
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18"Dia. Riser Area=3.14*0.75'^2=1.77
Height of Riser--3 ft.
Volume Displaced by Riser=1.77 ft*3 ft=5.31 cf f
Bouyant Force=5.31 cf*62.4 lb/cf=331 lb
Factor of Safety=2
331 lb*2.0(F.S)=Vconc(145-62.4)
Volume of Concrete needed=8.01 cf
Use 4'x 4'x I'Concrete Anti-Flotation Block.

Watershed #1 Basin #1
Subcal Reach On Link Routing Diagram for Basin#1
Prepared by E2S
HydroCAD®10.00-26 s/n 07329 02020 HydroCAD Software Solutions LLC

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Basin #1 Type 1124-hr 2 yr Rainfall=3.55"
Prepared by E2S
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 2
Summary for Subcatchment 1S: Watershed #1
Runoff = 14.63 cfs @ 12.03 hrs, Volume= 0.913 af, Depth= 2.88"
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 2 yr Rainfall=3.55"
Area(ac) CN Description --
_ 3.800 94 Newly graded area, HSG D
3.800 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
_ (min) (feet) (ft/ft) (ft/sec) (cfs)
2.3 100 0.0180 0.72 Sheet Flow,Sheet
n=0.025 P2=3.55"
9.6 795 0.0190 1.38 Shallow Concentrated Flow,Shallow Concent.
Nearly Bare&Untilled Kv= 10.0 fps
11.9 895 Total

Basin #1 Type/1 24-hr 2 yr Rainfall=3.55"
Prepared by E2S
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 3
Summary for Pond 'I P: Basin #1
Inflow Area= 3.800 ac, 0.00% Impervious, Inflow Depth= 2.88" for 2 yr event
Inflow = 14.63 cfs @ 12.03 hrs, Volume= 0.913 of
Outflow = 3.73 cfs @ 12.27 hrs, Volume= 0.913 af, Atten=74%, Lag= 14.4 min
Primary = 3.73 cfs @ 12.27 hrs, Volume= 0.913 of
Routing by Stor-Ind method, Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=241.70'@ 12.27 hrs Surf.Area= 12,637 sf Storage= 19,734 cf
Plug-Flow detention time=943.9 min calculated for 0.913 of(100% of inflow)
Center-of-Mass det.time=945.8 min ( 1,731.7-785.9)
_Volume Invert Avail Storage Storage Description
#1 240.00' 52,128 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
240.00 10,368 0 0
241.00 11,700 11,034 11,034
242.00 13,032 12,366 23,400
243.00 14,364 13,698 37,098
244.00 15,696 15,030 52,128
Device Routing Invert Outlet Devices
#1 Primary 239.00' 12.0" Round 12"CMP Barrel
L=50.0' CMP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert=239.00'/238.00' S=0.0200 7' Cc--0.900
n=0.025 Corrugated metal, Flow Area=0.79 sf
#2 Device 1 241.00' 18.0"Horiz. 18"CMP Riser C=0.600
Limited to weir flow at low heads
#3 Device 1 240.00' 0.038 cfs 2"Skimmer
#4 Primary 242.00' 10'Secondary Spillway,C=3.27
Offset(feet) 0.00 4.50 14.50 19.00
Height(feet) 1.50 0.00 0.00 1.50
Primary OutFlow Max=3.73 cfs @ 12.27 hrs HW=241.70' (Free Discharge)
1=12"CMP Barrel (Barrel Controls 3.73 cfs @ 4.75 fps)
2=18"CMP Riser (Passes< 7.13 cfs potential flow)
3=2"Skimmer (Passes< 0.04 cfs potential flow)
4=10'Secondary Spillway (Controls 0.00 cfs)

Basin#1 Type 11 24-hr 10 yr Rainfall=5.17"
Prepared by E2S
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 4
Summary for Subcatchment 1S: Watershed#1
Runoff = 22.11 cfs @ 12.03 hrs, Volume= 1.417 af, Depth= 4.48"
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=5.17"
Area(ac) CN Description
3.800 94 Newly graded area, HSG D
3.800 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs
2.3 100 0.0180 0.72 Sheet Flow, Sheet
n=0.025 P2=3.55"
9.6 795 0.0190 1.38 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare&Untilled Kv= 10.0 fps
11.9 895 Total

Basin #1 Type 11 24-hr 10 yr Rainfal1=5.17"
Prepared by E2S
HydroGADS 10 00 26 sln 07329 ©2020 HydroCAD Software Solutions LLC Page 5
Summary for Pond 1 P: Basin #1
Inflow Area = 3.800 ac, 0.00% Impervious, Inflow Depth = 4.48" for 10 yr event
Inflow = 22.11 cfs @ 12.03 hrs, Volume= 1.417 of
Outflow = 10.81 cfs @ 12.17 hrs, Volume= 1.417 af, Atten=51%, Lag= 8.7 min
Primary = 10.81 cfs @ 12.17 hrs, Volume= 1.417 of
Routing by Stor-Ind method,Time Span= 0.00-120.00 hrs, dt=0.05 hrs
Peak Elev= 242.33'@ 12.17 hrs Surf.Area= 13,472 sf Storage=27,923 cf
Plug-Flow detention time=636.9 min calculated for 1.417 of(100%of inflow)
Center-of-Mass det. time=638.9 min ( 1,413.4-774.5 )
Volume Invert Avail Storage Storage Description
#1 240.00' 52,128 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
240.00 10,368 0 0
241.00 11,700 11,034 11,034
242.00 13,032 12,366 23,400
243.00 14,364 13,698 37,098
244.00 15,696 15,030 52,128
Device Routing Invert Outlet Devices
#1 Primary 239.00' 12.0" Round 12"CMP Barrel
L=50.0' CMP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert=239.00'/238.00' S=0.0200 7' Cc--0.900
n= 0.025 Corrugated metal, Flow Area= 0.79 sf
#2 Device 1 241.00' 18.0"Horiz. 18"CMP Riser C=0.600
Limited to weir flow at low heads
#3 Device 1 240.00' 0.038 cfs 2"Skimmer
#4 Primary 242.00' 10' Secondary Spillway, C=3.27
Offset (feet) 0.00 4.50 14.50 19.00
Height(feet) 1.50 0.00 0.00 1.50
Primary OutFlow Max=10.53 cfs @ 12.17 hrs HW=242.32' (Free Discharge)
T=1=12"CMP Barrel (Barrel Controls 4.14 cfs @ 5.27 fps)
2=18" CMP Riser (Passes < 9.78 cfs potential flow)
3=2" Skimmer (Passes <0.04 cfs potential flow)
=10'Secondary Spillway (Weir Controls 6.39 cfs @ 1.67 fps)

Basin#1 Type 11 24-hr 25 yr Rainfall=6.15"
Prepared by E2S
H droCAD®10 00 26 sln 07329 ©2020 HydroCAD Software Solutions LLC Page 6
Summary for Subcatchment IS: Watershed#1
Runoff = 26.60 cfs @ 12.03 hrs, Volume= 1.724 af, Depth= 5.45"
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=6.15"
Area(ac) CN Description
3.800 94 Newly graded area, HSG D
3.800 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
_ (min) (feet) (fYft) (ft/sec) (cfs
2.3 100 0.0180 0.72 Sheet Flow,Sheet
n=0.025 P2=3.55"
9.6 795 0.0190 1.38 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare&Untilled Kv= 10.0 fps
11.9 895 Total

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Basin #1 Type/1 24-hr 25 yr Rainfall=6.15"
Prepared by E2S
HydrOCAD®10 00 26 s/n 07329 @ 2020 HydroCAD Software Solutions LLC Page 7
Summary for Pond 1 P: Basin #1
Inflow Area= 3.800 ac, 0.00% Impervious, Inflow Depth = 5.45" for 25 yr event
Inflow = 26.60 cfs @ 12.03 hrs, Volume= 1.724 of
Outflow = 16.98 cfs @ 12.14 hrs, Volume= 1.724 af, Atten=36%, Lag= 6.8 min
Primary = 16.98 cfs @ 12.14 hrs, Volume= 1.724 of
Routing by Stor-Ind method,Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Peak Elev=242.49'@ 12.14 hrs Surf.Area= 13,691 sf Storage= 30,176 cf
Plug-Flow detention time=534.7 min calculated for 1.724 of(100% of inflow)
Center-of-Mass det. time=536.7 min ( 1,306.4-769.7)
Volume Invert Avail Storage Storage Description
#1 240.00' 52,128 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cublc4eet)
240.00 10,368 0 0
241.00 11,700 11,034 11,034
242.00 13,032 12,366 23,400
243.00 14,364 13,698 37,098
244.00 15,696 15,030 52,128
Device Routing Invert Outlet Devices
#1 Primary 239.00' 12.0" Round 12"CMP Barrel
L=50.0' CMP, projecting, no headwall, Ke= 0.900
Inlet/Outlet Invert=239.00'/238.00' S=0.0200'P Cc= 0.900
n=0.025 Corrugated metal, Flow Area=0.79 sf
#2 Device 1 241.00' 18.0" Horiz. 18 CMP Riser C=0.600
Limited to weir flow at low heads
#3 Device 1 240.00' 0.038 cfs 2"Skimmer
#4 Primary 242.00' 10'Secondary Spillway, C=3.27
Offset(feet) 0.00 4.50 14.50 19.00
Height(feet) 1.50 0.00 0.00 1.50
Primary OutFlow Max=16.79 cfs @ 12.14 hrs HW=242.49' (Free Discharge)
L12" CMP Barrel (Barrel Controls 4.24 cfs @ 5.40 fps)
2=18"CMP Riser (Passes < 10.39 cfs potential flow)
3=2"Skimmer (Passes < 0.04 cfs potential flow)
4=10'Secondary Spillway (Weir Controls 12.54 cfs @ 1.98 fps)

1 S 1>
Watershed #2 Basin #2
SubCat Routing Diagram for Basin#2
Reach oh Linl<
Prepared by E2S
HydroCA l0.00-26 srn 07329 ©2020 HydroCAD Software Solutions LLC

Basin#2 Type 1124-hr 2 yr Rainfall=3.55" I
Prepared by E2S
HydroCAD®10.00-26 sln 07329 ©2020 HydroCAD Software Solutions LLC Page 2
Summary for Subcatchment 1S: Watershed #2
th= 2.88"
Volume= 3.553 af, De
Runoff 44.12 cfs @ 12.13 hrs, P
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 2 yr Rainfall=3.55"
Area(ac) CN Description
14.780 94 Newly graded area, HSG D
14.780 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs
2.1 100 0.0220 0.78 Sheet Flow, Sheet
n=0.025 P2=3.55"
18.7 1,423 0.0160 1.26 Shallow Concentrated Flow, Shallow Concent.
_ Nearly Bare& Untilled Kv= 10.0 fps
20.8 1,523 Total

Basin #2 Type H 24-hr 2 yr Rainfall=3.55"
Prepared by E2S
H droCAD@ 10 00 26 s/n 07329 @ 2020 HvdroCAD Software Solutions LLC Pace 3
Summary for Pond 1 P: Basin #2
Inflow Area= 14.780 ac, 0.00% Impervious, Inflow Depth = 2.88" for 2 yr event
Inflow = 44.12 cfs @ 12.13 hrs, Volume= 3.553 of
Outflow = 4.45 cfs @ 12.95 hrs, Volume= 3.152 af, Atten=90%, Lag=49.3 min
Primary = 4.45 cfs @ 12.95 hrs, Volume= 3.152 of
Routing by Stor-Ind method,Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Peak Elev=232.84' @ 12.95 hrs Surf.Area= 35,835 sf Storage=91,756 cf
Plug-Flow detention time=561.3 min calculated for 3.150 of(89% of inflow)
Center-of-Mass det. time= 507.6 min ( 1,301.8-794.2 )
Volume Invert Avail Storage Storage Description
#1 230.00' 174,855 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
230.00 28,050 0 0
231.00 31,436 29,743 29,743
232.00 33,794 32,615 62,358
233.00 36,224 35,009 97,367
234.00 38,726 37,475 134,842
235.00 41,300 40,013 174,855
Device Routing Invert Outlet Devices
#1 Primary 229.00' 12.0" Round 12"CMP Barrel
L=50.0' CMP, projecting, no headwall, Ke= 0.900
Inlet/Outlet Invert=229.00'/228.00' S=0.0200 T Cc=0.900
n=0.025 Corrugated metal, Flow Area= 0.79 sf
#2 Device 1 231.00' 18.0" Honz. 18" CMP Riser C= 0.600
Limited to weir flow at low heads
#3 Device 1 230.00' 0.038 cfs 2"Skimmer
#4 Primary 233.00' 20'Secondary Spillway, C=3.27
Offset(feet) 0.00 4.50 24.50 29.00
Height(feet) 1.50 0.00 0.00 1.50
rimary OutFlow Max=4.45 cfs @ 12.95 hrs HW=232.84' (Free Discharge)
1=12" CMP Barrel (Barrel Controls 4.45 cfs @ 5.66 fps)
L2=18" CMP Riser (Passes< 11.54 cfs potential flow)
3=2"Skimmer (Passes < 0.04 cfs potential flow)
-20'Secondary Spillway ( Controls 0.00 cfs)

Basin #2 Type 11 24-hr 10 yr Rainfall=5.17"
Prepared by E2S
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 4
Summary for Subcatchment 1S: Watershed#2
Runoff = 66.88 cfs @ 12.13 hrs, Volume= 5.513 af, Depth= 4.48"
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=5.17"
Area(ac) CN Description
_ 14.780 94 Newly graded area, HSG D
14.780 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
2.1 100 0.0220 0.78 Sheet Flow, Sheet
n=0.025 P2=3.55"
18.7 1,423 0.0160 1.26 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare& Untilled Kv= 10.0 fps
20.8 1,523 Total

Basin #2 Type Il 24-hr 10 yr Rain fall=5.17"
Prepared by E2S
HydroCAD®10 00 26 sin 07329 @ 2020 HydroCAD Software Solutions LLC Page 5
Summary for Pond 1P: Basin #2
Inflow Area= 14.780 ac, 0.00% Impervious, Inflow Depth = 4.48" for 10 yr event
Inflow = 66.88 cfs @ 12.13 hrs, Volume= 5.513 of
Outflow = 30.16 cfs @ 12.37 hrs, Volume= 5.110 af, Atten=55%, Lag= 14.8 min
Primary = 30.16 cfs @ 12.37 hrs, Volume= 5.110 of
Routing by Stor-Ind method, Time Span=0.00-120.00 hrs, dt= 0.05 hrs
Peak Elev=233.51'@ 12.37 hrs Surf.Area= 37,502 sf Storage= 116,507 cf
Plug-Flow detention time=403.2 min calculated for 5.108 of(93%of inflow)
Center-of-Mass det.time= 364.9 min( 1,147.6-782.7)
Volume Invert Avail Storage Storage Description
#1 230,00' 174,855 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
230.00 28,050 0 0
231.00 31,436 29,743 29,743
232.00 33,794 32,615 62,358
233.00 36,224 35,009 97,367
234.00 38,726 37,475 134,842
235.00 41,300 40,013 174,855
Device Routing Invert Outlet Devices
#1 Primary 229.00' 12.0" Round 12"CMP Barrel
L=50.0' CMP, projecting, no headwall, Ke= 0.900
Inlet/Outlet Invert=229.00'/228.00' S=0.0200? Cc=0.900
n=0.025 Corrugated metal, Flow Area=0.79 sf
_ #2 Device 1 231.00' 18.0" Horiz. 18"CMP Riser C=0.600
Limited to weir flow at low heads
#3 Device 1 230.00' 0.038 cfs 2"Skimmer
#4 Primary 233.00' 20'Secondary Spillway,C=3.27
Offset(feet) 0.00 4.50 24.50 29.00
Height(feet) 1.50 0.00 0.00 1.50
Primary OutFlow Max=29.77 cfs @ 12.37 hrs HW=233.51' (Free Discharge)
L12"CMP Barrel (Barrel Controls 4.82 cfs @ 6.14 fps)
2=18" CMP Riser (Passes < 13.47 cfs potential flow)
3=2"Skimmer (Passes <0.04 cfs potential flow)
=
=20'Secondary Spillway (Weir Controls 24.95 cfs @ 2.14 fps)

i
Basin#2 Type 1124-hr 25 yr Rainfall=6.15"
Prepared by E2S
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 6
Summary for Subcatchment 1S: Watershed #2
Runoff = 80.62 cfs @ 12.12 hrs, Volume= 6.707 af, Depth= 5.45"
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=6.15"
Area(ac) CN Description
14.780 94 Newly graded area, HSG D
14.780 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ftlsec) (cfs)
2.1 100 0.0220 0.78 Sheet Flow,Sheet
n=0.025 P2=3.55"
18.7 1,423 0.0160 1.26 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare&Untilled Kv= 10.0 fps
20.8 1,523 Total

Basin #2 Type 11 24-hr 25 yr Rainfall=6.15"
Prepared by E2S
H droCAD®10 00 26 s/n 07329 @ 2020 HydroCAD Software Solutions LLC Page
Summary for Pond 1 P: Basin #2
Inflow Area = 14.780 ac, 0.00% Impervious, Inflow Depth = 5.45" for 25 yr event
Inflow = 80.62 cfs @ 12.12 hrs, Volume= 6.707 of
Outflow = 49.49 cfs @ 12.30 hrs, Volume= 6.304 af, Atten=39%, Lag= 10.8 min
Primary = 49.49 cfs @ 12.30 hrs, Volume= 6.304 of
Routing by Stor-Ind method, Time Span= 0.00-120.00 hrs, dt=0.05 hrs
Peak Elev= 233.73' @ 12.30 hrs Surf.Area= 38,055 sf Storage= 124,787cf
Plug-Flow detention time= 346.0 min calculated for 6.301 of(94%of inflow)
Center-of-Mass det.time=313.6 min ( 1,091.5-778.0 )
Volume Invert Avall Storage Storage Description
#1 230.00' 174,855 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
230.00 28,050 0 0
231.00 31,436 29,743 29,743
232.00 33,794 32,615 62,358
233.00 36,224 35,009 97,367
234.00 38,726 37,475 134,842
235.00 41,300 40,013 174,855
Device Routing Invert Outlet Devices
#1 Primary 229.00' 12.0" Round 12" CMP Barrel
L=50.0' CMP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert--229.00'/228.00' S= 0.0200'P Cc= 0.900
n=0.025 Corrugated metal, Flow Area=0.79 sf
#2 Device 1 231.00' 18.0" Horiz. 18"CMP Riser C= 0.600
Limited to weir flow at low heads
#3 Device 1 230.00' 0.038 cfs 2" Skimmer
#4 Primary 233.00' 20' Secondary Spillway,C=3.27
Offset(feet) 0.00 4.50 24.50 29.00
Height(feet) 1.50 0.00 0.00 1.50
rimary OutFlow Max=49.24 cfs @ 12.30 hrs HW=233.73' (Free Discharge)
112" CMP Barrel (Barrel Controls 4.94 cfs @ 6.29 fps)
2=18" CMP Riser (Passes< 14.06 cfs potential flow)
3=2"Skimmer (Passes <0.04 cfs potential flow)
4=20' Secondary Spillway (Weir Controls 44.30 cfs @ 2.49 fps)

Watershed #3 Basin #3
Subcat Reach on Link Routing Diagram for Basin#3
Prepared by E2S
HydroCADO 10.00-26 sln 07324 0 2020 HydroCAD Software Solutions LLC

Basin #3 Type 11 24-hr 2 yr Rainfall=3.55"
Prepared by E2S
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 2
Summary for Subcatchment 1S: Watershed#3
Runoff — 18.02 cfs @ 11.98 hrs, Volume= 0.971 af, Depth= 2.88"
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 2 yr Rainfall=3.55"
Area ac CN Description
4.040 94 Newly graded area, HSG D
4.040 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (fVft) (ftlsec) (cfs)
2.9 100 0.0100 0.57 Sheet Flow, Sheet
n=0.025 P2=3.55"
4.3 448 0.0300 1.73 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare&Untilled Kv= 10.0 fps
7.2 548 Total

Basin #3 Type 1124-hr 2 yr Rainfal1=3.55"
Prepared by E2S
HydroCADO 10 00 26 sin 07329 @ 2020 HydroCAD Software Solutions LLC Page 3
Summary for Pond 1P: Basin #3
Inflow Area = 4.040 ac, 0.00% Impervious, Inflow Depth = 2.88" for 2 yr event
Inflow = 18.02 cfs @ 11.98 hrs, Volume= 0.971 of
Outflow = 2.42 cfs @ 12.27 hrs, Volume= 0.971 af, Atten= 87%, Lag= 17.5 min
Primary = 2.42 cfs @ 12.27 hrs, Volume= 0.971 of
Routing by Stor-Ind method, Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=240.28' @ 12.27 hrs Surf.Area= 19,304 sf Storage=23,555 cf
Plug-Flow detention time= 1,274.3 min calculated for 0.971 of(100% of inflow)
Center-of-Mass det.time= 1,275.9 min( 2,057.4-781.5)
Volume Invert Avail Storage Storage Description
#1 239.00' 106,950 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
239.00 17,100 0 0
240.00 18,816 17,958 17,958
241.00 20,532 19,674 37,632
242.00 22,248 21,390 59,022
243.00 23,964 23,106 82,128
244.00 25,680 24,822 106,950
Device Routing Invert Outlet Devices
#1 Primary 238.00' 12.0" Round 12" CMP Barrel
L=50.0' CMP, projecting, no headwall, Ke= 0.900
Inlet/Outlet Invert= 238.00'/237.00' S=0.0200 T Cc=0.900
n=0.025 Corrugated metal, Flow Area=0.79 sf
#2 Device 1 240.00' 18.0"Horiz. 18"CMP Riser C=0.600
Limited to weir flow at low heads
#3 Device 1 239.00' 0.072 cfs 2.5" Skimmer
#4 Primary 241.00' 10'Secondary Spillway, C=3.27
Offset(feet) 0.00 4.50 14.50 19.00
Height(feet) 1.50 0.00 0.00 1.50
Primary OutFlow Max=2.40 cfs @ 12,27 hrs HW=240.28' (Free Discharge)
12" CMP Barrel (Passes 2.40 cfs of 3.43 cfs potential flow)
2=18"CMP Riser (Weir Controls 2.33 cfs @ 1.74 fps)
3=2.5"Skimmer (Constant Controls 0.07 cfs)
4=10'Secondary Spillway ( Controls 0.00 cfs)

f
Basin#3 Type 1124-hr 90 yrRainfall=5.17"
Prepared by E2S
HydroCAD410.00-26 s/n 07329 @ 2020 HydroCAD Software Solutions LLC Page 4
Summary for Subcatchment 1S: Watershed#3
Runoff = 27.18 cfs @ 11.98 hrs, Volume= 1.507 af, Depth= 4.48"
Runoff by SCS TR-20 method, UH=SCS,Wei9 hted-CN,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Type II 24-hr 10 yr Rainfall=5.17"
Area ac CN Description
4.040 94 Newlygraded area HSG D
4.040 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ftlft) (ft/sec) (cfs
2.9 100 0.0100 0.57 Sheet Flow, Sheet
n=0.025 P2= 3.55"
4.3 448 0.0300 1.73 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare&Untilled Kv= 10.0 fps
7.2 548 Total

r
Basin #3 Type 1124-hr 10 yr Rainfall=5.17"
Prepared by E2S
HydroCAD®10 00 26 s/n 07329 m 2020 HydroCAD Software Solutions LLC Page 5
Summary for Pond 1 P: Basin #3
Inflow Area = 4.040 ac, 0.00% Impervious, Inflow Depth = 4.48" for 10 yr event
Inflow = 27.18 cfs @ 11.98 hrs, Volume= 1.507 of
Outflow = 3.87 cfs @ 12.25 hrs, Volume= 1.507 af, Atten= 86%, Lag= 16.1 min
Primary = 3.87 cfs @ 12.25 hrs, Volume= 1.507 of
Routing by Stor-Ind method, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Peak Elev=240.91'@ 12.25 hrs Surf.Area=20,382 sf Storage=35,907 of
Plug-Flow detention time=865.1 min calculated for 1.506 of(100% of inflow)
Center-of-Mass det. time=866.8 min ( 1,636.9-770.1 )
Volume Invert Avail Storage Storage Description
#1 239.00' 106,950 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
239.00 17,100 0 0
240.00 18,816 17,958 17,958
241.00 20,532 19,674 37,632
242.00 22,248 21,390 59,022
243.00 23,964 23,106 82,128
244.00 25,680 24,822 106,950
Device Routing Invert Outlet Devices
#1 Primary 238.00' 12.0" Round 12" CMP Barrel
L= 50.0' CMP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert=238.00'/237.00' S=0.0200'/' Cc=0.900
n=0.025 Corrugated metal, Flow Area=0.79 sf
#2 Device 1 240.00' 18.0"Horiz. 18"CMP Riser C=0.600
Limited to weir flow at low heads
#3 Device 1 239.00' 0.072 cfs 2.5"Skimmer
#4 Primary 241.00' 10'Secondary Spillway,C=3.27
Offset(feet) 0.00 4.50 14.50 19.00
Height(feet) 1.50 0.00 0.00 1.50
Primary OutFlow Max=3.87 cfs @ 12.25 hrs HW=240.91' (Free Discharge)
12" CMP Barrel (Barrel Controls 3.87 cfs @ 4.93 fps)
2=18" CMP Riser (Passes< 8.13 cfs potential flow)
3=2.5" Skimmer (Passes < 0.07 cfs potential flow)
4=10' Secondary Spillway (Controls 0.00 cfs)

i
f
1
I
Basin#3 Type 11 24-hr 25 yr Rainfall=6.15" 1
Prepared by E2S 1
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 6
Summary for Subcatchmervt IS: Watershed#3
Runoff = 32.67 cfs @ 11.98 hrs, Volume= 1.833 af, Depth= 5.45"
i
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Type 1124-hr 25 yr Rainfall=6.15"
Area ac CN Description
4.040 94 Newly graded area HSG D
4.040 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
min feet ft/ft ft/sec cfs
2.9 100 0.0100 0.57 Sheet Flow, Sheet
n=0.025 P2=3.55"
4.3 448 0.0300 1.73 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare&Untilled Kv= 10.0 fps
7.2 548 Total

Basin #3 Type ll 24-hr 25 yr Rainfall=6.15"
Prepared by E2S
HydroCADO 10 00 26 s/n 07329 @ 2020 HvdroCAD Software Solutions LLC Page 7
Summary for Pond 1 P: Basin #3
Inflow Area= 4.040 ac, 0.00% Impervious, Inflow Depth = 5.45" for 25 yr event
Inflow = 32.67 cfs @ 11.98 hrs, Volume= 1.833 of
Outflow = 7.83 cfs @ 12.16 hrs, Volume= 1.833 af, Atten=76%, Lag= 10.8 min
Primary = 7.83 cfs @ 12.16 hrs, Volume= 1.833 of
Routing by Stor-Ind method,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=241.23' @ 12.16 hrs Surf.Area=20,922 sf Storage=42,492 cf
Plug-Flow detention time=731.6 min calculated for 1.832 of(100% of inflow)
Center-of-Mass det. time=733.3 min ( 1,498.7-765.3 )
Volume Invert Avail Storage Storage Description
#1 239.00' 106,950 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
239.00 17,100 0 0
240.00 18,816 17,958 17,958
241.00 20,532 19,674 37,632
242.00 22,248 21,390 59,022
243.00 23,964 23,106 82,128
244.00 25,680 24,822 106,950
Device RouUnq Invert Outlet Devices
#1 Primary 238.00' 12.0" Round 12" CMP Barrel
L=50.0' CMP, projecting, no headwall, Ke= 0.900
Inlet/Outlet Invert=238.00'/237.00' S=0.0200'/' Cc=0.900
n=0.025 Corrugated metal, Flow Area=0.79 sf
#2 Device 1 240.00' 18.0"Horiz. 18"CMP Riser C=0.600
Limited to weir flow at low heads
#3 Device 1 239.00' 0.072 cfs 2.5"Skimmer
#4 Primary 241.00' 10' Secondary Spillway, C=3.27
Offset(feet) 0.00 4.50 14.50 19.00
Height(feet) 1.50 0.00 0.00 1.50
Primary OutFlow Max=7.75 cfs @ 12.16 hrs HW=241.22' '(Free Discharge)
11
12' CMP Barrel (Barrel Controls 4.08 cfs @ 5.19 fps)
2=18" CMP Riser (Passes< 9.42 cfs potential flow)
3=2.5"Skimmer (Passes<0.07 cfs potential flow)
4=10' Secondary Spillway (Weir Controls 3.67 cfs @ 1.44 fps)

1S � 1P
Watershed #4 Basin #4
SUbcat Reach On Link Routing Diagram for Basin N4
Prepared by E2S
HydroCADO 10.00-26 sin 07324 0 2020 HydroCAD Software Solutions LLC

i •
I
I
Basin#4 Type 1124-hr 2 yr Rainfall=3.55"
Prepared by E2S
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 2
Summary for Subcatchment 1S: Watershed#4
Runoff = 29.19 cfs @ 11.99 hrs, Volume= 1.613 af, Depth= 2.88"
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 2 yr Rainfall=3.55"
Area(ac) CN Description
6.710 94 Newly graded area, HSG D
6.710 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ftlft) (ft/sec) (cfs)
1.9 100 0.0280 0.86 Sheet Flow, Sheet
n=0.025 P2=3.55"
6.2 592 0.0250 1.58 Shallow Concentrated Flow,Shallow Concent.
Nearly Bare& Untilled Kv= 10.0 fps
8.1 692 Total

Basin #4 Type 1124-hr 2 yr Rainfall=3.55"
Prepared by E2S
HydroCADO 10 00 26 s/n 07329 O 2020 HydroCAD Software Solutions LLC Page 3
Summary for Pond 1 P: Basin #4
Inflow Area= 6.710 ac, 0.00% Impervious, Inflow Depth= 2.88" for 2 yr event
Inflow = 29.19 cfs @ 11.99 hrs, Volume= 1.613 of
Outflow = 3.76 cfs @ 12.32 hrs, Volume= 1.612 af, Atten=87%, Lag
Primary min
Primary -- 3.76 cfs @ 12.32 hrs, Volume= 1.612 of
Routing by Stor-Ind method,Time Span= 0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=248.74'@ 12.32 hrs Surf.Area=24,534 sf Storage=38,601 cf
Plug-Flow detention time= 1,047.1 min calculated for 1.612 of(100%of inflow)
Center-of-Mass det.time= 1,048.9 min ( 1,831.3-782.4)
_Volume Invert Avail Storage Storage Description
#1 247.00' 133,650 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) sq ft) (cubic-feet) (cubic-feet)
247.00 19,500 0 0
248.00 22,392 20,946 20,946
249.00 25,284 23,838 44,784
250.00 28,176 26,730 71,514
251.00 31,068 29,622 101,136
252.00 33,960 32,514 133,650
Device Routing Invert Outlet Devices
#1 Primary 246.00' 12.0" Round 12"CMP Barrel
L=50.0' CMP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert=246.00'1245.00' S=0.0200'P Cc=0.900
n=0.025 Corrugated metal, Flow Area=0.79 sf
#2 Device 1 248.00' 18.0"Horiz. 18"CMP Riser C=0.600
Limited to weir flow at low heads
#3 Device 1 247.00' 0.072 cfs 2.5"Skimmer
#4 Primary 249.00' 10'Secondary Spillway,C=3.27
Offset(feet) 0.00 4.50 14.50 19.00
Height(feet) 1.50 0.00 0.00 1.50
Primary OutFlow Max=3.76 cfs @ 12.32 hrs HW=248.74' (Free Discharge)
T13=2.5"
2"CMP Barrel (Barrel Controls 3.76 cfs @ 4.79 fps)
=18"CMP Riser (Passes<7.32 cfs potential flow)
Skimmer (Passes< 0.07 cfs potential flow)
4=10'Secondary Spillway ( Controls 0.00 cfs)

Basin#4 Type 11 24-hr 10 yr Rainfall=5.17"
Prepared by E2S
H droCAD®10.00-26 sln 07329 ©2020 H droCAD Software Solutions LLC Page 4
y v a
Summary for Subcatchment 1S: Watershed#4
Runoff = 44.05 cfs @ 11.99 hrs, Volume= 2.503 af, Depth= 4.48"
i
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=5.17"
Area(ac) CN Description
I
6.710 94 Newly graded area, HSG D
6.710 100.00% Pervious Area
i
1
Tc Length Slope Velocity Capacity Description
(min) (feet) (ftlft) (ft/sec) (cfs) j
1.9 100 0.0280 0.86 Sheet Flow, Sheet
n=0.025 P2=3.55"
6.2 592 0.0250 1.58 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare&Untilled Kv= 10.0 fps
8.1 692 Total
i
1
f

Basin #4 Type 1124-hr 10 yr Rainfall=5.17"
Prepared by E2S
H droCADO 10 00 26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 5
Summary for Pond 1P: Basin #4
Inflow Area = 6.710 ac, 0.00% Impervious, Inflow Depth = 4.48" for 10 yr event
Inflow = 44.05 cfs @ 11.99 hrs, Volume= 2.503 of
Outflow = 14.06 cfs @ 12.15 hrs, Volume= 2.502 af, Atten=68%, Lag= 9.7 min
Primary = 14.06 cfs @ 12.15 hrs, Volume= 2.502 of
Routing by Stor-Ind method, Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=249.42' @ 12.15 hrs Surf.Area=26,502 sf Storage= 56,043 cf
Plug-Flow detention time=716.4 min calculated for 2.501 of(100% of inflow)
Center-of-Mass det. time=718.3 min ( 1,489.3-771.0 )
Volume Invert Avail Storage Storage Description
#1 247.00' 133,650 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
247.00 19,500 0 0
248.00 22,392 20,946 20,946
249.00 25,284 23,838 44,784
250.00 28,176 26,730 71,514
251.00 31,068 29,622 101,136
252.00 33,960 32,514 133,650
Device Routing Invert Outlet Devices
#1 Primary 246.00' 12.0" Round 12"CMP Barrel
L=50.0' CMP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert=246.00'/245.00' S=0.0200 '/' Cc=0.900
n=0.025 Corrugated metal, Flow Area= 0.79 sf
#2 Device 1 248.00' 18.0" Horiz. 18"CMP Riser C=0.600
Limited to weir flow at low heads
#3 Device 1 247.00' 0.072 cfs 2.5"Skimmer
#4 Primary 249.00' 10' Secondary Spillway,C=3.27
Offset(feet) 0.00 4.50 14.50 19.00
Height(feet) 1.50 0.00 0.00 1.50
Primary OutFlow Max=14.04 cfs @ 12.15 hrs HW=249.42' (Free Discharge)
�L1 72"CMP Barrel (Barrel Controls 4.20 cfs @ 5.35 fps)
2=18"CMP Riser (Passes<10.14 cfs potential flow)
3=2.5" Skimmer (Passes <0.07 cfs potential flow)
4 10' Secondary Spillway (Weir Controls 9.84 cfs @ 1.87 fps)

i
Basin #4 Type/1 24-hr 25 yr Rainfall=6.95"
Prepared by E2S
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 6
Summary for Subcatchment 1S: Watershed #4
Runoff = 52.96 cfs @ 11.99 hrs, Volume= 3.045 af, Depth= 5.45"
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=6.15"
Area (ac) CN Description 6.710 94 Newly graded area, HSG D
6.710 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
1.9 100 0.0280 0.86 Sheet Flow, Sheet
n=0.025 P2=3.55"
6.2 592 0.0250 1.58 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare&Unfilled Kv= 10.0 fps
8.1 692 Total

i •
Basin #4 Type 1124-hr 25 yr Rainfall=6.15"
Prepared by E2S
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 7
Summary for Pond 1P: Basin#4
Inflow Area= 6.710 ac, 0.00% Impervious, Inflow Depth = 5.45" for 25 yr event
Inflow = 52.96 cfs @ 11.99 hrs, Volume= 3.045 of
Outflow = 25.29 cfs @ 12.11 hrs, Volume= 3.044 af, Atten=52%, Lag=7.3 min
Primary = 25.29 cfs @ 12.11 hrs, Volume= 3.044 of
Routing by Stor-Ind method, Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=249.67'@ 12.11 hrs Surf.Area=27,228 sf Storage=62,754 cf
Plug-Flow detention time=603.6 min calculated for 3.043 of(100%of inflow)
Center-of-Mass det.time=605.6 min ( 1,371.7-766.2 )
Volume Invert Avail Storage Storage Description
#1 247.00' 133,650 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic feet)
247.00 19,500 0 0
248.00 22,392 20,946 20,946
249.00 25,284 23,838 44,784
250.00 28,176 26,730 71,514
251.00 31,068 29,622 101,136
252.00 33,960 32,514 133,650
Device Routing Invert Outlet Devices
#1 Primary 246.00' 12.0" Round 12"CMP Barrel
L=50.0' CMP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert=246.00'/245.00' S=0.0200 7' Cc=0.900
n=0.025 Corrugated metal, Flow Area=0.79 sf
#2 Device 1 248.00' 18.0"Horiz. 18"CMP Riser C=0.600
Limited to weir flow at low heads
#3 Device 1 247.00' 0.072 cfs 2.5"Skimmer
#4 Primary 249.00' 10'Secondary Spillway,C=3.27
Offset(feet) 0.00 4.50 14.50 19.00
Height(feet) 1.50 0.00 0.00 1.50
Primary OutFlow Max=24.91 cfs @ 12.11 hrs HW=249.66' (Free Discharge)
1=12"CMP Barrel (Barrel Controls 4.35 cfs @ 5.53 fps)
L
2_18"CMP Riser (Passes < 10.98 cfs potential flow)
3 2.5"Skimmer (Passes <0.07 cfs, potential flow)
4=10'Secondary Spillway (Weir Controls 20.56 cfs @ 2.21 fps)

is `� P
Watershed #5A Basin #5A
SUbcat Reach On Link Routing Diagram for Basin 45A
Prepared by E2S
HydroCAD®10.00-26 sin 07329 0 2020 HydroCAD Software Solutions LLC

• A
Basin MA Type ll 24-hr 2 yr Rainfall=3.55"
Prepared by E2S
HvdroCAD®10 00 26 s/n 07329 02020 Hy
droCAD Software Solutions LLC Page 2
Summary for Subcatchment 1S: Watershed#5A
Runoff = 17.29 cfs @ 11.97 hrs, Volume= 0.911 af, Depth= 2.88"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Type 1124-hr 2 yr Rainfall=3.55"
_ Area(ac) CN Description
3.790 94 Newly graded area, HSG D
3.790 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs
2.7 100 0.0120 0.61 Sheet Flow,Sheet
n=0.025 P2=3.55"
3.4 325 0.0250 1.58 Shallow Concentrated Flow, Shallow Concent.
_ Nearly Bare&Untilled Kv= 10.0 fps
6.1 425 Total

Basin MA Type 1124-hr 2 yr Rainfall=3.55"
Prepared by E2S
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 3
Summary for Pond 1 P: Basin #5A
Inflow Area= 3.790 ac, 0.00% Impervious, Inflow Depth= 2.88" for 2 yr event
Inflow = 17.29 cfs @ 11.97 hrs, Volume= 0.911 of
Outflow = 3.67 cfs @ 12.15 hrs, Volume= 0.910 af, Atten=79%, Lag= 10.8 min
Primary = 3.67 cfs @ 12.15 hrs, Volume= 0.910 of
Routing by Stor Ind method,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=257.61'@ 12.15 hrs Surf.Area= 13,968 sf Storage=20,652 cf
Plug-Flow detention time= 1,130.1 min calculated for 0.909 of(100%of inflow)
Center-of-Mass det.time= 1,131.2 min( 1,911.7-780.5)
_Volume Invert Avail Storage Storage Description
#1 256.00' 58,489 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
256.00 11,550 0 0
257.00 12,996 12,273 12,273
258.00 140596 13,796 26,069
259.00 16,192 15,394 41,463
260.00 17,860 17,026 58,489
_Device Routing Invert Outlet Devices
#1 Primary 255.00' 12.0" Round 12"CMP Barrel
L=50.0' CMP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert=255.00'/254.00' S=0.0200 7' Cc=0.900
n=0.025 Corrugated metal, Flow Area=0.79 sf
#2 Device 1 257.00' 18.0"Horiz. 18"CMP Riser C=0.600
Limited to weir flow at low heads
#3 Device 1 256.00' 0.038 cfs 2"Skimmer
#4 Primary 258.00' 10'Secondary Spillway C=3.27
Offset(feet) 0.00 4.50 14.50 19.00
Height(feet) 1.50 0.00 0.00 1.50
Primary OutFlow Max=3.67 cfs @ 12.15 hrs HW=257.61' (Free Discharge)
=12"CMP Barrel (Barrel Controls 3.67 cfs @ 4.67 fps)
2=18"CMP Riser (Passes<6.63 cfs potential flow)
3=2"Skimmer (Passes<0.04 cfs potential flow)
=10'Secondary Spillway ( Controls 0.00 cfs)

Basin NA Type 1124-hr 90 yr Rainfall=5.97"
Prepared by E2S
HydroCAD®10 00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 4
Summary for Subcatchment 1S: Watershed#5A
Runoff = 26.09 cfs @ 11.96 hrs, Volume= 1.414 af, Depth= 4.48"
Runoff by SCS TR-20 method, UH=SCS,Weighted-CN,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Type 11 24-hr 10 yr Rainfall=5.17"
_ Area (ac) CN Description
3.790 94 Newly graded area, HSG D
3.790 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ftift) (ft/sec) (cfs)
2.7 100 0.0120 0.61 Sheet Flow, Sheet
n=0.025 P2= 3.55"
3.4 325 0.0250 1.58 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare&Untilled Kv= 10.0 fps
6.1 425 Total

Basin #5A Type 1124-hr 10 yr Rainfall=5.17"
Prepared by E2S
HydroCADO 10 00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 5
Summary for Pond 1P: Basin NA
Inflow Area= 3.790 ac, 0.00% Impervious, Inflow Depth= 4.48" for 10 yr event
Inflow = 26.09 cfs @ 11.96 hrs, Volume= 1.414 of
Outflow = 9.46 cfs @ 12.10 hrs, Volume= 1.412 af, Atten=64%, Lag=8.1 min
Primary - 9.46 cfs @ 12.10 hrs, Volume= 1.412 of
Routing by Stor-Ind method,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=258.29'@ 12.10 hrs Surf.Area= 15,052 sf Storage= 30,466 cf
Plug-Flow detention time=759.9 min calculated for 1.412 of(100% of inflow)
Center-of-Mass det.time=761.4 min( 1,530.5-769.1 )
Volume Invert Avail Storage Storage Description
#1 256.00' 58,489 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq ft) (cubic-feet) (cubic-feet)
256.00 11,550 0 0
257.00 12,996 12,273 12,273
258.00 14,596 13,796 26,069
259.00 16,192 15,394 41,463
260.00 17,860 17,026 58,489
Device Routing Invert Outlet Devices
#1 Primary 255.00' 12.0" Round 12"CMP Barrel
L=50.0' CMP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert--255.00'/254.00' S=0.0200 7' Cc=0.900
n=0.025 Corrugated metal, Flow Area=0.79 sf
#2 Device 1 257.00' 18.0" Horiz. 18"CMP Riser C=0.600
Limited to weir flow at low heads
#3 Device 1 256.00' 0.038 cfs 2"Skimmer
#4 Primary 258.00' 10'Secondary Spillway, C=3.27
Offset(feet) 0.00 4.50 14.50 19.00
Height(feet) 1.50 0.00 0.00 1.50
Primary OutFlow Max=9.43 cfs @ 12.10 hrs HW=258.29' (Free Discharge)
E=1=12"CMP Barrel (Barrel Controls 4.12 cfs @ 5.24 fps)
2=18"CMP Riser (Passes<9.65 cfs potential flow)
3=2"Skimmer (Passes <0.04 cfs potential flow)
4=10'Secondary Spillway (Weir Controls 5.32 cfs @ 1.59 fps)

Basin NA Type //24-hr 25 yr Rainfall=6.95"
Prepared by E2S
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 6
Summary for Subcatchment IS: Watershed#5A
Runoff = 31.36 cfs @ 11.96 hrs, Volume= 1.720 af, Depth= 5.45"
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=6.15"
Area (ac) CN Description
3.790 94 Newly graded area, HSG D
3.790 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs
2.7 100 0.0120 0.61 Sheet Flow, Sheet
n=0.025 P2=3.55"
3.4 325 0.0250 1.58 Shallow Concentrated Flow,Shallow Concent.
Nearly Bare& Untilled Kv= 10.0 fps
6.1 425 Total

f
Basin #5A Type 11 24-hr 25 yr Rainfall=6.15"
Prepared by E2S
HydroCAD®10 00-26 sln 07329 ©2020 HydroCAD Software Solutions LLC Page 7
Summary for Pond 1 P: Basin #5A
Inflow Area= 3.790 ac, 0.00% Impervious, Inflow Depth= 5.45" for 25 yr event
Inflow = 31.36 cfs @ 11.96 hrs, Volume= 1.720 of
Outflow - 17.20 cfs @ 12.06 hrs, Volume= 1.718 af, Atten=45%, Lag=6.0 min
Primary - 17.20 cfs @ 12.06 hrs, Volume= 1.718 of
Routing by Stor-Ind method, Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=258.50'@ 12.06 hrs Surf.Area= 15,395 sf Storage= 33,774 cf
Plug-Flow detention time=636.7 min calculated for 1.718 of(100% of inflow)
Center-of-Mass det. time=638.3 min( 1,402.7-764.3)
Volume Invert Avail.Storage Storage Description
#1 256.00' 58,489 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
256.00 11,550 0 0
257.00 12,996 12,273 12,273
258.00 14,596 13,796 26,069
259.00 16,192 15,394 41,463
260.00 17,860 17,026 58,489
Device Routing Invert Outlet Devices
#1 Primary 255.00' 12.0" Round 12"CMP Barrel
L=50.0' CMP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert=255.00'/254.00' S=0.02007' Cc=0.900
n=0.025 Corrugated metal, Flow Area=0.79 sf
#2 Device 1 257.00' 18.0"Horiz. 18"CMP Riser C=0.600
Limited to weir flow at low heads
#3 Device 1 256.00' 0.038 cfs 2"Skimmer
#4 Primary 258.00' 10'Secondary Spillway, C=3.27
Offset(feet) 0.00 4.50 14.50 19.00
Height(feet) 1.50 0.00 0.00 1.50
rimary OutFiow Max=16.67 cfs @ 12.06 hrs HW=258.49' (Free Discharge)
=12"CMP Barrel (Barrel Controls 4.24 cfs @ 5.40 fps)
2=18"CMP Riser (Passes< 10.38 cfs potential flow)
3=2"Skimmer (Passes <0.04 cfs potential flow)
4=10'Secondary Spillway (Weir Controls 12.43 cfs @ 1.97 fps)

1S
Watershed #5B Basin #5B
Subcat Reach on Link Routing Diagram for Basin#5B
Prepared by E2S
HydroCADO 10.00-26 stn 07329 0 2020 HydroCAD Software Solutions LLC

r
Basin OB Type 1124-hr 2 yr Rainfall=3.55"
Prepared by E2S
HydroCAD®10 00-26 s/n 07329 ©2020 Hy
droCAD Software Solutions LLC Page 2
Summary for Subcatchment 1 S: Watershed OB
Runoff = 21.17 cfs @ 11.97 hrs, Volume= 1.127 af, Depth= 2.88"
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 2 yr Rainfall=3.55"
Area(ac) CN Description 4.690 94 Newly graded area, HSG D
4.690 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
1.8 100 0.0330 0.92 Sheet Flow,Sheet
n=0.025 P2= 3.55"
4.6 570 0.0430 2.07 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare& Untilled Kv= 10.0 fps
6.4 670 Total

Basin #5B Type //24-hr 2 yr Rainfall=3.55"
Prepared by E2S
HydroCADO 10.00-26 s/n 07329 O 2020 HydroCAD Software Solutions LLC Page 3
Summary for Pond 1 P: Basin #5B
Inflow Area = 4.690 ac, 0.00% Impervious, Inflow Depth = 2.88" for 2 yr event
Inflow - 21.17 cfs @ 11.97 hrs, Volume= 1.127 of
Outflow = 3.65 cfs @ 12.18 hrs, Volume= 1.127 af, Atten=83%, Lag= 12.5 min
Primary = 3.65 cfs @ 12.18 hrs, Volume= 1.127 of
Routing by Stor-Ind method,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=238.59'@ 12.18 hrs Surf.Area= 17,725 sf Storage=25,751 cf
Plug-Flow detention time=865.8 min calculated for 1.127 of(100%of inflow)
Center-of-Mass det.time=867.2 min ( 1,648.0-780.8)
Volume Invert Avail Storage Storage Description
#1 237.00' 74,384 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
237.00 14,350 0 0
238.00 16,473 15,412 15,412
239.00 18,596 17,535 32,946
240.00 20,719 19,658 52,604
241.00 22,842 21,781 749384
_Device Routing Invert Outlet Devices
#1 Primary 236.00' 12.0" Round 12"CMP Barrel
L= 50.0' CMP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert=236.00'/235.00' S=0.0200 7' Cc=0.900
n=0.025 Corrugated metal, Flow Area=0.79 sf
#2 Device 1 238.00' 18.0"Horiz. 18"CMP Riser C=0.600
Limited to weir flow at low heads
#3 Device 1 237.00' 0.072 cfs 2.5"Skimmer
#4 Primary 239.00' 10'Secondary Spillway, C=3.27
Offset(feet) 0.00 4.50 14.50 19.00
Height(feet) 1.50 0.00 0.00 1.50
rimary OutFlow Max=3.65 cfs @ 12.18 hrs HW=238.59' (Free Discharge)
�12"CMP Barrel (Barrel Controls 3.65 cfs @ 4.65 fps)
2=18"CMP Riser (Passes<6.53 cfs potential flow)
3=2.5"Skimmer (Passes <0.07 cfs potential flow)
=10'Secondary Spillway ( Controls 0.00 cfs)

o f
I
Basin#5B Type 1124-hr 10 yr Rainfall=5.17
Prepared by E2S
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 4
Summary for Subcatchment IS: Watershed #5B
Runoff = 31.93 cfs @ 11.97 hrs, Volume= 1.749 af, Depth= 4.48"
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=5.17"
Area ac CN Description
4.690 94 Newly graded area, HSG D
4.690 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
_ (min) (feet)' (fVft) (ft/sec) (cfs
1.8 100 0.0330 0.92 Sheet Flow,Sheet
n=0.025 P2=3.55"
4.6 570 0.0430 2.07 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare& Untilled Kv= 10.0 fps
6.4 670 Total

Basin#5B Type 1124-hr 10 yr Rainfall=5.17"
Prepared by E2S
HydroCADO 10 00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 5
Summary for Pond 1 P: Basin #5B
Inflow Area= 4.690 ac, 0.00% Impervious, Inflow Depth = 4.48" for 10 yr event
Inflow - 31.93 cfs @ 11.97 hrs, Volume= 1.749 of
Outflow = 9.77 cfs @ 12.12 hrs, Volume= 1.749 af, Atten=69%, Lag=8.9 min
Primary = 9.77 cfs @ 12.12 hrs, Volume= 1.749 of
Routing by Stor-Ind method,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=239.30'@ 12.12 hrs Surf.Area= 19,225 sf Storage=38,771 cf
Plug-Flow detention time=597.0 min calculated for 1.749 of(100%of inflow)
Center-of-Mass det.time=596.7 min( 1,366.1 -769.4)
Volume Invert Avail Storage Storage Description
#1 237.00' 74,384 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
237.00 14,350 0 0
238.00 16,473 15,412 15,412
239.00 18,596 17,535 32,946
240.00 20,719 19,658 52,604
241.00 22,842 21,781 74,384
Device Routing Invert Outlet Devices
#1 Primary 236.00' 12.0" Round 12"CMP Barrel
L=50.0' CMP, projecting, no headwall, Ke=0.900
Inlet 1 Outlet Invert=236.00'/235.00' S=0.0200 7' Cc=0.900
n=0.025 Corrugated metal, Flow Area=0.79 sf
#2 Device 1 238.00' 18.0" Horiz. 18"CMP Riser C=0.600
Limited to weir flow at low heads
#3 Device 1 237.00' 0.072 cfs 2.5"Skimmer
#4 Primary 239.00' 10'Secondary Spillway,C=3.27
Offset(feet) 0.00 4.50 14.50 19.00
Height(feet) 1.50 0.00 0.00 1.50
Primary OutFlow Max=9.54 cfs @ 12.12 hrs HW=239.29' (Free Discharge)
=12'CMP Barrel (Barrel Controls 4.12 cfs @ 5.24 fps)
2=18"CMP Riser (Passes<9.66 cfs potential flow)
3=2.5"Skimmer (Passes<0.07 cfs potential flow)
4=10'Secondary Spillway (Weir Controls 5.42 cfs @ 1.60 fps)

I
Basin #5B Type 1124-hr 25 yr Rainfall=6.15"
Prepared by E2S
HydroCAD®10 00 26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 6
Summary for Subcatchment 1S: Watershed#5B
Runoff = 38.39 cfs @ 11.97 hrs, Volume= 2.128 af, Depth= 5.45"
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=6:15"
_ Area(ac) CN Description
4.690 94 Newly graded area, HSG D
4.690 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (fVft) (ft/sec) (cfs
1.8 100 0.0330 0.92 Sheet Flow, Sheet
n=0.025 P2=3.55"
4.6 570 0.0430 2.07 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare& Untilled Kv= 10.0 f s
6.4 670 Total

i
Basin #5B Type/1 24-hr 25 yr Rainfall=6.15"
Prepared by E2S
HydroCADV 10 00 26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 7
Summary for Pond 1 P: Basin #5B
Inflow Area= 4.690 ac, 0.00% Impervious, Inflow Depth= 5.45" for 25 yr event
Inflow = 38.39 cfs @ 11.97 hrs, Volume= 2.128 of
Outflow = 18.38 cfs @ 12.08 hrs, Volume= 2.128 af, Atten=52%, Lag=6.5 min
Primary = 18.38 cfs @ 12.08 hrs, Volume= 2.128 of
Routing by Stor-Ind method, Time Span= 0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=239.53'@ 12.08 hrs Surf.Area= 19,717 sf Storage=43,322 cf
Plug-Flow detention time=502.9 min calculated for 2.127 of(100% of inflow)
Center-of-Mass det. time=504.4 min ( 1,269.0-764.6 )
Volume Invert Avail Storage Storage Description
#1 237.00' 74,384 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
237.00 14,350 0 0
238.00 16,473 15,412 15,412
239.00 18,596 17,535 32,946
240.00 20,719 19,658 52,604
241.00 22,842 21,781 74,384
Device Routing Invert Outlet Devices
#1 Primary 236.00' 12.0" Round 12"CMP Barrel
L=50.0' CMP, projecting, no headwall, Ke= 0.900
Inlet/Outlet Invert=236.00'/235.00' S=0.0200'P Cc= 0.900
n=0.025 Corrugated metal, Flow Area= 0.79 sf
#2 Device 1 238.00' 18.0"Horiz. 18"CMP Riser C=0.600
Limited to weir flow at low heads
#3 Device 1 237.00' 0.072 cfs 2.5"Skimmer
#4 Primary 239.00' 10'Secondary Spillway,C=3.27
Offset(feet) 0.00 4.50 14.50 19.00
Height(feet) 1.50 0.00 0.00 1.50
Primary OutFlow Max=18.05 cfs @ 12.08 hrs HW=239.52' (Free Discharge)
� 12"CMP Barrel (Barrel Controls 4.26 cfs @ 5.42 fps)
2=18" CMP Riser (Passes < 10.49 cfs potential flow)
3=2.5"Skimmer (Passes<0.07 cfs potential flow)
4 10' Secondary Spillway (Weir Controls 13.79 cfs @ 2.02 fps)

1S v 1P
Watershed #6 Basin #6
Subcat Reach on rUnk Routing Diagram for Basin#6
Prepared by E2S
HydroCADB 10.00-26 sln 07329 ©2020 HydroCAD Software Solutions LLC

i
i
Basin#6 Type 1124-hr 2 yr Rainfall=3.55" j
Prepared by E2S
HydroCADO 10.00-26 s/n 07329 O 2020 HydroCAD Software Solutions LLC Page 2 i
Summary for Subcatchment IS: Watershed#6
Runoff - 19.30 cfs @ 12.01 hrs, Volume= 1.144 af, Depth= 2.88"
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 2 yr Rainfall=3.55"
Area (ac) CN Description
4.760 94 Newly graded area, HSG D
4.760 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
2.1 100 0.0220 0.78 Sheet Flow, Sheet
n=0.025 P2=3.55"
8.1 846 0.0300 1.73 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare&Untilled Kv= 10.0 fps
10.2 946 Total

Basin #6 Type 11 24-hr 2 yr Rainfall=3.55"
Prepared by E2S
HydroCADO 10 00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 3
Summary for Pond 1 P: Basin #6
i
Inflow Area= 4.760 ac, 0.00% Impervious, Inflow Depth= 2.88" for 2 yr event
Inflow = 19.30 cfs @ 12.01 hrs, Volume= 1.144 of
Outflow = 3.73 cfs @ 12.28 hrs, Volume= 1.102 af, Atten=81%, Lag= 15.9 min
Primary - 3.73 cfs @ 12.28 hrs, Volume= 1.102 of
Routing by Stor-Ind method,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=233.70'@ 12.28 hrs Surf.Area= 17,011 sf Storage=26,254 cf
Plug-Flow detention time=1,059.0 min calculated for 1.101 of(96%of inflow)
Center-of-Mass det. time= 1,038.6 min ( 1,822.9-784.3)
Volume Invert Avail Storage Storage Description
#1 232.00' 70,722 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
232.00 13,700 0 0
233.00 15,600 14,650 14,650
234.00 17,620 16,610 31,260
235.00 19,713 18,667 49,927
236.00 21,877 20,795 70,722
Device Routing Invert Outlet Devices
#1 Primary 231.00' 12.0" Round 12"CMP Barrel
L=50.0' CMP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert--231.00'/230.00' S,0.0200'/' Cc=0.900
n=0.025 Corrugated metal, Flow Area=b.79 sf
#2 Device 1 233.00' 18.0"Horiz. 18"CMP Riser C=0.600
Limited to weir flow at low heads
#3 Device 1 232.00' 0.038 cfs 2"Skimmer
#4 Primary 234.00' 10'Secondary Spillway,C=3.27
Offset(feet) 0.00 4.50 14.50 19.00
Height(feet) 1.50 0.00 0.00 1.50
Primary OutFlow Max--3.73 cfs @ 12.28 hrs HW=233.70' (Free Discharge)
=12"CMP Barrel (Barrel Controls 3.73 cfs @ 4.75 fps)
2=18"CMP Riser (Passes<7.11 cfs potential flow)
3=2"Skimmer (Passes<0.04 cfs potential flow)
4=10'Secondary Spillway ( Controls 0.00 cfs)

I
i
I
Basin #6 Type ll 24-hr 10 yr Rainfall=5.17"
I
Prepared by E2S
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 4
Summary for Subcatchment 1S: Watershed#6
Runoff = 29.16 cfs @ 12.01 hrs, Volume= 1.775 af, Depth= 4.48"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Type 1124-hr 10 yr Rainfall=5.17"
_ Area(ac) CN Description
_ 4.760 94 Newly graded area, HSG D
4.760 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
2.1 100 0.0220 0.78 Sheet Flow,Sheet
n=0.025 P2=3.55"
8.1 846 0.0300 1.73 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare&Untilled Kv= 10.0 fps
- 10.2 946 Total
i

c •
Basin#6 Type 11 24-hr 10 yr Rainfall=5.17"
Prepared by E2S
HydroCADO 10 00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 5
Summary for Pond 1 P: Basin #6
Inflow Area = 4.760 ac, 0.00% Impervious, Inflow Depth= 4.48" for 10 yr event
Inflow = 29.16 cfs @ 12.01 hrs, Volume= 1.775 of
Outflow - 11.57 cfs @ 12.17 hrs, Volume= 1.732 af, Atten=60%, Lag=9.5 min
Primary - 11.57 cfs @ 12.17 hrs, Volume= 1.732 of
Routing by Stor-Ind method, Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=234.35'@ 12.17 hrs Surf.Area= 18,357 sf Storage=37,834 cf
Plug-Flow detention time=705.7 min calculated for 1.731 of(98% of inflow)
Center-of-Mass det. time=692.3 min( 1,465.2-772.9 )
Volume Invert Avail Storage Storage Description
#1 232.00' 70,722 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area 1nc.Store Cum.Store
(feet) (sq-ft) (cubic feet) (cubic-feet)
232.00 13,700 0 0
233.00 15,600 14,650 14,650
234.00 17,620 16,610 31,260
235.00 19,713 18,667 49,927
236.00 21,877 20,795 70,722
Device Routing Invert Outlet Devices
#1 Primary 231.00' 12.0" Round 12"CMP Barrel
L=50.0' CMP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert=231.00'/230.00' S=0.0200 7' Cc=0.900
n=0.025 Corrugated metal, Flow Area=0.79 sf
#2 Device 1 233.00' 18.0"Horiz. 18"CMP Riser C=0.600
Limited to weir flow at low heads
#3 Device 1 232.00' 0.038 cfs 2"Skimmer
#4 Primary 234.00' 10'Secondary Spillway,C=3.27
Offset(feet) 0.00 4.50 14.50 19.00
Height(feet) 1.50 0.00 0.00 1.50
Primary OutFlow Max=11.33 cfs @ 12.17 hrs, HW=234.34' (Free Discharge)
=12"CMP Barrel (Barrel Controls 4.15 cfs @ 5.29 fps)
2=18"CMP Riser (Passes< 9.87 cfs potential flow)
3=2"Skimmer (Passes<0.04 cfs potential flow)
=10'Secondary Spillway (Weir Controls 7.17 cfs @ 1.72 fps)

Basin#6 Type 11 24-hr 25 yr Rainfall=6.15"
Prepared by E2S
HydroCADO 10 00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 6
Summary for Subcatchment 1S: Watershed#6
Runoff — 35.07 cfs @ 12.01 hrs, Volume= 2.160 af, Depth= 5.45"
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=6.15"
Area(ac) CN Description
4.760 94 Newly graded area, HSG D
4.760 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
2.1 100 0.0220 0.78 Sheet Flow,Sheet
n=0.025 P2=3.55"
8.1 846 0.0300 1.73 Shallow Concentrated Flow,Shallow Concent.
Nearly Bare&Untilled Kv= 10.0 fps
10.2 946 Total

Basin #6 Type 11 24-hr 25 yr Rainfall=6.15"
Prepared by E2S
HyaroCADV 1 n nn-26 s/n 07329 n 2020 HydroCAD Software Solutions LLC Paoe 7
Summary for Pond 1P: Basin #6
Inflow Area = 4.760 ac, 0.00% Impervious, Inflow Depth = 5.45" for 25 yr event
Inflow = 35.07 cfs @ 12.01 hrs, Volume= 2.160 of
Outflow = 19.34 cfs @ 12.13 hrs, Volume= 2.116 af, Atten=45%, Lag= 7.1 min
Primary = 19.34 cfs @ 12.13 hrs, Volume= 2.116 of
Routing by Stor-Ind method, Time Span= 0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=234.55' @ 12.13 hrs Surf.Area= 18,770 sf Storage=41,513 cf
Plug-Flow detention time=589.5 min calculated for 2.115 of(98% of inflow)
Center-of-Mass det. time=578.6 min ( 1,346.7-768.1 )
Volume Invert Avail Storage Storage Description
#1 232.00' 70,722 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
232.00 13,700 0 0
233.00 15,600 14,650 14,650
234.00 17,620 16,610 31,260
235.00 19,713 18,667 49,927
236.00 21,877 20,795 70,722
Device Routing Invert Outlet Devices __-
#1 Primary 231.00' 12.0" Round 12"CMP Barrel
L=50.0' CMP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert= 231.00'/230.00' S=0.0200'/' Cc= 0.900
n=0.025 Corrugated metal, Flow Area=0.79 sf
#2 Device 1 233.00' 18.0" Horiz. 18"CMP Riser C=0.600
Limited to weir flow at low heads
#3 Device 1 232.00' 0.038 cfs 2" Skimmer
#4 Primary 234.00' 10' Secondary Spillway,C=3.27
Offset(feet) 0.00 4.50 14.50 19.00
Height(feet) 1.50 0.00 0.00 1.50
rtmary OutFlow Max=19.04 cfs @ 12.13 hrs HW=234.54' (Free Discharge)
12"CMP Barrel (Barrel Controls 4.27 cfs @ 5.44 fps)
2=18"CMP Riser (Passes < 10.57 cfs potential flow)
3=2"Skimmer (Passes < 0.04 cfs potential flow)
-10'Secondary Spillway (Weir Controls 14.76 cfs @ 2.05 fps)

1S `` 1P
Watershed #7 Basin #7
Subcat Reach On Link R:OUting Diagram for Basin#7
Prepared by E2S
HydroCAD®1O.00,26 07329 02020 HydroCAD Software Solutions LLC

Basin #7 Type 1124-hr 2 yr Rainfall=3.55"
Prepared by E2S
HydroCAD®10 00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 2
Summary for Subcatchment 1S: Watershed#7
Runoff — 12.33 cfs @ 11.98 hrs, Volume= 0.666 af, Depth= 2.88"
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 2 yr Rainfall=3.55"
Area (ac) CN Description
2.770 94 Newly graded area, HSG D
2.770 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
1.5 100 0.0530 1.11 Sheet Flow, Sheet
n=0.025 P2=3.55"
5.8 659 0.0360 1.90 Shallow Concentrated Flow,Shallow Concent.
Nearly Bare&Untilled Kv= 10.0 fps
7.3 759 Total

Basin #7 Type 1124-hr 2 yr Rainfall=3.55"
Prepared by E2S
HvdroCADO 10.00-26 sln 07329 O 2020 HydroCAD Software Solutions LLC Page 3
Summary for Pond 1 P: Basin #7
Inflow Area= 2.770 ac, 0.00% Impervious, Inflow Depth= 2.88" for 2 yr event
Inflow = 12.33 cfs @ 11.98 hrs, Volume= 0.666 of
Outflow = 3.58 cfs @ 12.14 hrs, Volume= 0.666 af, Atten=71%, Lag=9.4 min
Primary = 3.58 cfs @ 12.14 hrs, Volume= 0.666 of
Routing by Stor-Ind method,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=238.48'@ 12.14 hrs Surf.Area= 10,852 sf Storage= 14,383 cf
Plug-Flow detention time=921.2 min calculated for 0.666 of(100% of inflow)
Center-of-Mass det.time=922.8 min ( 1,704.4-781.6)
_Volume Invert Avail Storage Storage Description
#1 237.00' 47,371 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area inc.Store Cum.Store
_ (feet) (sq-ft) (cubic feet) (cubic-feet)
237.00 8,300 0 0
238.00 9,987 9,144 9,144
239.00 11,783 10,885 20,029
240.00 13,652 12,718 32,746
241.00 15,597 14,625 47,371
Device Routing Invert Outlet Devices
#1 Primary 236.00' 12.0" Round 12"CMP Barrel
L=50.0' CMP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert=236.00'/235.00' S=0.0200'/' Cc=0.900
n=0.025 Corrugated metal, Flow Area=0.79 sf
#2 Device 1 238.00' 18.0" Horiz. 18"CMP Riser C=0.600
Limited to weir flow at low heads
#3 Device 1 237.00' 0.038 cfs 2"Skimmer
#4 Primary 239.00' 10'Secondary Spillway,C=3.27
Offset(feet) 0.00 4.50 14.50 19.00
Height(feet) 1.50 0.00 0.00 1.50
Primary OutFlow Max=3.58 cfs @ 12.14 hrs HW=238.48' (Free Discharge)
E-12 CMP Barrel (Barrel Controls 3.58 cfs @ 4.55 fps)
2=18"CMP Riser (Passes< 5.11 cfs potential flow)
3=2"Skimmer (Passes<0.04 cfs potential flow)
4=10'Secondary Spillway ( Controls 0.00 cfs)

Basin #7 Type 1124-hr 10 yr RainfaU=5.17"
Prepared by E2S
HydroCAD®10 00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 4
Summary for Subcatchment 1S: Watershed#7
Runoff = 18.59 cfs @ 11.98 hrs, Volume= 1.033 af, Depth= 4.48"
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=5.17"
Area(ac) CN Description
2.770 94 Newly graded area, HSG D
2.770 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
1.5 100 0.0530 1.11 Sheet Flow, Sheet
n=0.025 P2=3.55"
5.8 659 0.0360 1.90 Shallow Concentrated Flow,Shallow Concent.
Nearly Bare&Untilled Kv= 10.0 fps
7.3 759 Total

Basin #7 Type 1124-hr 10 yr Rainfall=5.17"
Prepared by E2S
HydroCADO 10.00-26 sln 07329 ©2020 HydroCAD Software Solutions LLC Page 5
Summary for Pond 1 P: Basin #7
Inflow Area= 2.770 ac, 0.00% Impervious, Inflow Depth= 4.48" for 10 yr event
Inflow = 18.59 cfs @ 11.98 hrs, Volume= 1.033 of
Outflow = 5.74 cfs @ 12.13 hrs, Volume= 1.033 af, Atten=69%, Lag=9.1 min
Primary = 5.74 cfs @ 12.13 hrs, Volume= 1.033 of
Routing by Stor Ind method,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=239.14'@ 12.13 hrs Surf.Area= 12,038 sf Storage=21,765 cf
Plug-Flow detention time=624.7 min calculated for 1.033 of(100%of inflow)
Center-of-Mass det.time=626.3 min ( 1,396.6-770.2)
Volume Invert Avail Storage Storage Description
#1 237.00' 47,371 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
_ (feet) (sq-ft) (cubic-feet) (cubic-feet)
237.00 8,300 0 0
238.00 9,987 9,144 9,144
239.00 11,783 10,885 20,029
240.00 13,652 12,718 32,746
241.00 15,597 14,625 47,371
Device Routing Invert Outlet Devices
#1 Primary 236.00' 12.0" Round 12"CMP Barrel
L=50.0' CMP, projecting, no headwall, Ke=0.900
Inlet/Outlet invert--236.00'1235.00' S=0.0200'1' Cc=0.900
n=0.025 Corrugated metal, Flow Area=0.79 sf
#2 Device 1 238.00' 18.0"Horiz.18"CMP Riser C=0.600
Limited to weir flow at low heads
#3 Device 1 237.00' 0.038 cfs 2"Skimmer
#4 Primary 239.00' 10'Secondary Spillway,C=3.27
Offset(feet) 0.00 4.50 14.50 19.00
Height(feet) 1.50 0.00 0.00 1.50
Primary OutFlow Max=5.66 cfs @ 12.13 hrs HW=239.13' (Free Discharge)
r=1=12"CMP Barrel (Barrel Controls 4.02 cfs @ 5.12 fps)
2=18"CMP Riser (Passes<9.06 cfs potential flow)
3=2"Skimmer (Passes<0.04 cfs potential flow)
-10'Secondary Spillway (Weir Controls 1.64 cfs @ 1.14 fps)

I
i
i
Basin#7 Type 1124-hr 25 yr Rainfall=6.95"
Prepared by E2S
HydroCAD®10.00-26 s/n 07329 O 2020 HydroCAD Software Solutions LLC Page 6
Summary for Subcatchment 1S: Watershed#7
Runoff = 22.35 cfs @ 11.98 hrs, Volume= 1.257 af, Depth= 5.45"
j
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=6.15"
Area(ac) CN Description
2.770 94 Newly graded area, HSG D
2.770 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
1.5 100 0.0530 1.11 Sheet Flow, Sheet
n=0.025 P2=3.55"
5.8 659 0.0360 1.90 Shallow Concentrated Flow,Shallow Concent.
Nearly Bare&Until led Kv= 10.0 fps
7.3 759 Total

1
Basin#7 Type 1124-hr 25 yr Rainfall=6.15"
Prepared by E2S
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 7
Summary for Pond 1 P: Basin #7
Inflow Area = 2.770 ac, 0.00% Impervious, Inflow Depth = 5.45" for 25 yr event
Inflow = 22.35 cfs @ 11.98 hrs, Volume= 1.257 of
Outflow = 10.99 cfs @ 12.09 hrs, Volume= 1.257 af, Atten=51%, Lag= 6.8 min
Primary = 10.99 cfs @ 12.09 hrs, Volume= 1.257 of
Routing by Stor-Ind method,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=239.33'@ 12.09 hrs Surf.Area= 12,408 sf Storage=24,282 cf
Plug-Flow detention time=525.5 min calculated for 1.256 of(100%of inflow)
Center-of-Mass det.time=527.1 min ( 1,292.6-765.4)
Volume Invert Avail Storage Storage Description
#1 237.00' 47,371 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq ft) (cubic-feet) (cubic-feet)
237.00 8,300 0 0
238.00 9,987 9,144 9,144
239.00 11,783 ( 10,885 20,029
240.00 13,652 12,718 32,746
241.00 15,597 14,625 47,371
Device Routing Invert Outlet Devices
#1 Primary 236.00' 12.0" Round 12"CMP Barrel
L= 50.0' CMP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert=236.00'1235.00' S=0.0200? Cc=0.900
n=0.025 Corrugated metal, Flow Area=0.79 sf
#2 Device 1 238.00' 18.0" Horiz.18"CMP Riser C=0.600
Limited to weir flow at low heads
#3 Device 1 237.00'. 0.038 cfs 2"Skimmer
#4 Primary 239.00' 10'Secondary Spillway,C=3.27
Offset(feet) 0.00 4.50 14.50 19.00
Height(feet) 1.50 0.00 0.00 1.50
Primary OutFlow Max=10.86 cfs @ 12.09 hrs HW=239.33' (Free Discharge)
=12"CMP Barrel (Barrel Controls 4.14 cfs @ 5.28 fps)
2=18"CMP Riser (Passes <9.82 cfs potential flow)
3=2"Skimmer (Passes<0.04 cfs potential flow)
=10'Secondary Spillway (Weir Controls 6.71 cfs @ 1.69 fps)

1S �` 1P ,
Watershed #8 Basin #8
Subcat Reach on Link Routing Diagram for Basin N8
Prepared by E2S
FHydr.CADOO10.00-26 s/n 07329 0 2020 HydroCAD Software Solulions LLC

I
Basin#8 Type 1124-hr 2 yr Rainfali=3.55"
Prepared by E2S
HydroCAD®10.00-26 s/n 07329 O 2020 HydroCAD Software Solutions LLC Page 2
Summary for Subcatchment IS: Watershed#8
Runoff — 35.37 cfs @ 11.97 hrs, Volume= 1.870 af, Depth= 2.88"
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 2 yr Rainfall=3.55"
_ Area (ac) CN Description
_ 7.780 94 Newly graded area, HSG D
7.780 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
_ (min) (feet) (ft/ft) (ft/sec) (cfs)
1.4 100 0.0590 1.16 Sheet Flow, Sheet
n=0.025 P2=3.55"
4.8 646 0.0500 2.24 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare&Untilled Kv= 10.0 fps
6.2 746 Total

Basin #8 Type 1124-hr 2 yr Rainfall=3.55°
Prepared by E2S
HydroCADO 10 00-26 s/n 07329 O 2020 HydroCAD Software Solutions LLC Page 3
Summary for Pond 1 P: Basin#8
Inflow Area= 7.780 ac, 0.00% Impervious, Inflow Depth= 2.88" for 2 yr event
Inflow - 35.37 cfs @ 11.97 hrs, Volume= 1.870 of
Outflow - 3.62 cfs @ 12.38 hrs, Volume= 1.870 af, Atten=90%, Lag=24.8 min
Primary = 3.62 cfs @ 12.38 hrs, Volume= 1.870 of
Routing by Stor-Ind method, Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=238.54'@ 12.38 hrs Surf.Area= 31,879 sf Storage=45,842 cf
Plug-Flow detention time= 1,136.0 min calculated for 1.869 of(100%of inflow)
Center-of-Mass det.time= 1,137.7 min ( 1,918.3-780.6 )
Volume Invert Avail Storage Storage Description
#1 237.00' 133,625 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
237.00 27,000 0 0
238.00 30,121 28,561 28,561
239.00 33,350 31,736 60,296
240.00 36,647 34,999 951295
241.00 40,013 38,330 133,625
Device Routing Invert Outlet Devices
#1 Primary 236.00' 12.0" Round 12"CMP Barrel
L=50.0' CMP, projecting, no headwall; Ke=0.900
Inlet/Outlet Invert=236.00'/235.00' S=0.0200'/' Cc=0.900
n=0.025 Corrugated metal, Flow Area=0.79 sf
#2 Device 1 238.00' 18.0" Horiz. 18"CMP Riser C=0.600
Limited to weir flow at low heads
#3 Device 1 237.00' 0.110 cfs 3"Skimmer
#4 Primary 239.00' 10'Secondary Spillway,C=3.27
Offset(feet) 0.00 4.50 14.50 19.00
Height(feet) 1.50 0.00 0.00 1.50
Primary OutFlow Max=3.62 cfs @ 12.38 hrs HW=238.54' (Free Discharge)
=12"CMP Barrel (Barrel Controls 3.62 cfs @ 4.61 fps)
2=18"CMP Riser (Passes<6.19 cfs potential flow)
3=3"Skimmer (Passes<0.11 cfs potential flow)
4=10'Secondary Spillway ( Controls 0.00 cfs)

' I
Basin#8 Type 1!24-hr 10 yr Rainfall=5.1 7"
Prepared by E2S
HydroCAD®10.00-26 sln 07329 ©2020 HydroCAD Software Solutions LLC Page 4
Summary for Subcatchment IS: Watershed#8
Runoff = 53.36 cfs @ 11.97 hrs, Volume= 2.902 af, Depth= 4.48"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Type Il 24-hr 10 yr Rainfall=5.17"
Area (ac) CN Description
7.780 94 Newly graded area, HSG D
7.780 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
1.4 - 100 0.0590 1.16 Sheet Flow, Sheet
n=0.025 P2=3.55"
4.8 646 0.0500 2.24 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare& Untilled Kv= 10.0 fps
6.2 746 Total

Basin #8 Type 11 24-hr 10 yr Rainfall=5.17"
Prepared by E2S
HvdroCADO 10 00 26 sln 07329 @ 2020 HydroCAD Software Solutions LLC Pape 5
Summary for Pond 1P: Basin #8
Inflow Area = 7.780 ac, 0.00% Impervious, Inflow Depth= 4.48" for 10 yr event
Inflow = 53.36 cfs @ 11.97 hrs, Volume= 2.902 of
Outflow = 9.28 cfs @ 12.17 hrs, Volume= 2.902 af, Atten=83%, Lag= 12.4 min
Primary = 9.28 cfs @ 12.17 hrs, Volume= 2.902 of
Routing by Stor-Ind method, Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=239.28' @ 12.17 hrs Surf.Area= 34,273 sf Storage=70,097 cf
Plug-Flow detention time=791.4 min calculated for 2.901 of(100% of inflow)
Center-of-Mass det. time=793.2 min ( 1,562.4-769.2 )
Volume Invert Avail Storage Storage Description
#1 237.00' 133,625 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
237.00 27,000 0 0
238.00 30,121 28,561 28,561
239.00 33,350 31,736 60,296
240.00 36,647 34,999 95,295
241.00 40,013 38,330 133,625
Device Routing Invert Outlet Devices
#1 Primary 236.00' 12.0" Round 12"CMP Barrel
L= 50.0' CMP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert= 236.00'/235.00' S=0.0200'/' Cc=0.900
n=0.025 Corrugated metal, Flow Area= 0.79 sf
#2 Device 1 238.00' 18.0" Horiz. 18" CMP Riser C=0.600
Limited to weir flow at low heads
#3 Device 1 237.00' 0.110 cfs 3"Skimmer
#4 Primary 239.00' 10'Secondary Spillway,C=3.27
Offset(feet) 0.00 4.50 14.50 19.00
Height (feet) 1.50 0.00 0.00 1.50
rimary OutFlow Max=9.20 cfs @ 12.17 hrs HW=239.28' (Free Discharge)
2"CMP Barrel (Barrel Controls 4.11 cfs @ 5.23 fps)
�1
2=18"CMP Riser (Passes < 9.62 cfs potential flow)
3=3" Skimmer (Passes< 0.11 cfs potential flow)
=10' Secondary Spillway (Weir Controls 5.09 cfs @ 1.57 fps)

Basin 48 Type 1124-hr 25 yr Rainfall=6.1 5"
Prepared by E2S
HydroCAD®10 00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 6
Summary for Subcatchment IS: Watershed#8
Runoff — 64.14 cfs @ 11.97 hrs, Volume= 3.530 af, Depth= 5.45"
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=6.15"
Area(ac) CN Description
7.780 94 Newly graded area, HSG D
7.780 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ftift) (fVsec) (cfs)
1.4 100 0.0590 1.16 Sheet Flow, Sheet
n=0.025 P2=3.55"
4.8 646 0.0500 2.24 Shallow Concentrated Flow,Shallow Concent.
Nearly Bare&Untilled Kv= 10.0 fps
6.2 746 Total

• Type ii 24-hr 25 r Rainfali=6.15"
Basin #8 YP y
Prepared by E2S
HydroCADO 10.00-26 s/n 07329 O 2020 HydroCAD Software Solutions LLC Paae 7
Summary for Pond 1 P: Basin #8
Inflow Area= 7.780 ac, 0.00% Impervious, Inflow Depth= 5.45" for 25 yr event
Inflow = 64.14 cfs @ 11.97 hrs, Volume= 3.530 of
Outflow = 20.69 cfs @ 12.11 hrs, Volume= 3.530 af, Atten=68%, Lag=8.6 min
Primary - 20.69 cfs @ 12.11 hrs, Volume= 3.530 of
Routing by Stor-Ind method, Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=239.58'@ 12.11 hrs Surf.Area=35,257 sf Storage=80,541 cf
Plug-Flow detention time=668.6 min calculated for 3.529 of(100% of inflow)
Center-of-Mass det.time=670.4 min ( 1,434.8-764.4)
Volume Invert Avail Storage Storage Description
#1 237.00' 133,625 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic feet)
237.00 27,000 0 0
238.00 30,121 28,561 28,561
239.00 33,350 31,736 60,296
240.00 36,647 34,999 95,295
241.00 40,013 38,330 133,625
Device Routing Invert Outlet Devices
#1 Primary 236.00' 12.0" Round 12"CMP Barrel
L=50.0' CMP, projecting, no headwall, Ke=0.900
Inlet I Outlet Invert=236.00'1235.00' S=0.0200 7' Cc=0.900
n=0.025 Corrugated metal, Flow Area=0.79 sf
#2 Device 1 238.00' 18.0"Horiz.18"CMP Riser C=0.600
Limited to weir flow at low heads
#3 Device 1 237.00' 0.110 cfs 3"Skimmer
#4 Primary 239.00' 10'Secondary Spillway,C=3.27
Offset(feet) 0.00 4.50 14.50 19.00
Height(feet) 1.50 0.00 0.00 1.50
rimary OutFlow Max=20.43 cfs @ 12.11 hrs HW=239.57' (Free Discharge)
=12"CMP Barrel (Barrel Controls 4.29 cfs @ 5.46 fps)
2=18"CMP Riser (Passes < 10.67 cfs potential flow)
3=3"Skimmer (Passes <0.11 cfs potential flow)
=10'Secondary Spillway (Weir Controls 16.14 cfs @ 2.10 fps)

Watershed #9 Basin #9
OSubcat Reach on Link Routing Diagram for Basin 99
Prepared by E2S
HydroCAD®10.00-26 stn 07329 ©2020 HydroCAD Software Solutions LLC

� r
Basin#9 Type 1124-hr 2 yr Rainfall=3.55"
Prepared by E2S
HydroCAD®10 00-26 s/n 07329 O 2020 HydroCAD Software Solutions LLC Page 2
Summary for Subcatchment 1 S: Watershed #9
Runoff = 22.01 cfs @ 11.98 hrs, Volume= 1.192 af, Depth= 2.88"
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 2 yr Rainfall=3.55"
Area (ac) CN Description
4.960 94 Newly graded area, HSG D
4.960 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
1.7 100 0.0410 1.00 Sheet Flow,Sheet
n=0.025 P2=3.55"
5.7 615 0.0320 1.79 Shallow Concentrated Flow,Shallow Concent.
Nearly Bare&Untilled Kv= 10.0 fps
7.4 715 Total

Yr
Basin#9 Type Il 24-hr 2 yr Rainfall=3.55"
Prepared by E2S
HydroCADO 10 00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 3
Summary for Pond 1 P: Basin #9
Inflow Area= 4.960 ac, 0.00% Impervious, Inflow Depth= 2.88" for 2 yr event
Inflow = 22.01 cfs @ 11.98 hrs, Volume= 1.192 of
Outflow - 3.57 cfs @ 12.22 hrs, Volume= 1.192 af, Atten=84%, Lag= 14.4 min
Primary - 3.57 cfs @ 12.22 hrs, Volume= 1.192 of
Routing by Stor-Ind method,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=240.47'@ 12.22 hrs Surf.Area=20,449 sf Storage=27,945 cf
Plug-Flow detention time= 1,095.6 min calculated for 1.192 of(100%of inflow)
Center-of-Mass det. time= 1,097.2 min ( 1,878.9-781.7)
Volume Invert Avail.Storage Storage Description
#1 239.00' 85,862 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
239.00 17,100 0 0
240.00 19,538 18,319 18,319
241.00 21,478 20,508 38,827
242.00 23,498 22,488 61,315
243.00 25,596 24,547 85,862
Device Routing Invert Outlet Devices
#1 Primary 238.00' 12.0" Round 12"CMP Barrel
L=50.0' CMP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert=238.00'/237.00' S=0.0200'/' Cc=0.900
n=0.025 Corrugated metal, Flow Area=0.79 sf
#2 Device 1 240.00' 18.0"Horiz. 18"CMP Riser C=0.600
Limited to weir flow at low heads
#3 Device 1 239.00' 0.072 cfs 2.5"Skimmer
#4 Primary 241.00' 10'Secondary Spillway,C=3.27
Offset(feet) 0.00 4.50 14.50 19.00
Height(feet) 1.50 0.00 0.00 1.50
Primary OutFlow Max=3.57 cfs @ 12.22 hrs HW=240.47' (Free Discharge)
t=1=12"CMP Barrel (Barrel Controls 3.57 cfs @ 4.54 fps)
2=18"CMP Riser (Passes<4.94 cfs potential flow)
3=2.5"Skimmer (Passes <0.07 cfs potential flow)
4=10'Secondary Spillway ( Controls 0.00 cfs)

i
Basin #9 Type ll 24-hr 90 yr Rainfall=5.17"
Prepared by E2S
HydroCAD®10 00 26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 4
Summary for Subcatchment IS: Watershed#9
Runoff = 33.20 cfs @ 11.98 hrs, Volume= 1.850 af, Depth= 4.48"
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=5.17"
_ Area(ac) CN Description
4.960 94 Newly graded area, HSG D
4.960 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
1.7 100 0.0410 1.00 Sheet Flow, Sheet
n=0.025 P2= 3.55"
5.7 615 0.0320 1.79 Shallow Concentrated Flow, Shallow Concent.
_ Nearly Bare& Untilled Kv= 10.0 fps
7.4 715 Total

Basin #9 Type lI 24-hr 10 yr Rainfall=5.17"
Prepared by E2S
HydroCADO 10 00 26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 5
Summary for Pond 1P: Basin #9
Inflow Area = 4.960 ac, 0.00% Impervious, Inflow Depth = 4.48" for 10 yr event
Inflow = 33.20 cfs @ 11.98 hrs, Volume= 1.850 of
Outflow = 6.88 cfs @ 12.18 hrs, Volume= 1.850 af, Atten=79%, Lag= 11.7 min
Primary = 6.88 cfs @ 12.18 hrs, Volume= 1.850 of
Routing by Stor-Ind method, Time Span=0.00-120.00 hrs, dt= 0.05 hrs
Peak Elev=241.19' @ 12.18 hrs Surf.Area= 21,860 sf Storage=43,082 cf
Plug-Flow detention time=750.0 min calculated for 1.849 of(100% of inflow)
Center-of-Mass det. time=751.8 min ( 1,522.1 -770.3 )
Volume Invert Avail Storage Storage Description
#1 239.00' 85,862 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
239.00 17,100 0 0
240.00 19,538 18,319 18,319
241.00 21,478 20,508 38,827
242.00 23,498 22,488 61,315
243.00 25,596 24,547 85,862
Device Routing Invert Outlet Devices
#1 Primary 238.00' 12.0" Round 12"CMP Barrel
L=50.0' CMP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert=238.00'/237.00' S=0.0200'/' Cc=0.900
n=0.025 Corrugated metal, Flow Area= 0.79 sf
#2 Device 1 240.00' 18.0"Horiz. 18"CMP Riser C=0.600
Limited to weir flow at low heads
#3 Device 1 239.00' 0.072 cfs 2.5" Skimmer
#4 Primary 241.00' 10'Secondary Spillway,C=3.27
Offset(feet) 0.00 4.50 14.50 19.00
Height(feet) 1.50 0.00 0.00 1.50
primary OutFlow Max=6.83 cfs @ 12.18 hrs HW=241.19' (Free Discharge)
11
2"CMP Barrel (Barrel Controls 4.05 cfs @ 5.16 fps)
�1
2=18"CMP Riser (Passes< 9.27 cfs potential flow)
3=2.5"Skimmer (Passes <0.07 cfs potential flow)
4=10'Secondary Spillway (Weir Controls 2.78 cfs @ 1.33 fps)

i
Basin#9 Type 11 24-hr 25 yr Rainfall=6.15"
Prepared by E2S
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 6
Summary for Subcatchment IS: Watershed#9
Runoff = 39.91 cfs @ 11.98 hrs, Volume= 2.251 af, Depth= 5.45"
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=6.15"
Area (ac) CN Description
4.960 94 Newly graded area, HSG D
4.960 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs
1.7 100 0.0410 1.00 Sheet Flow, Sheet
n=0.025 P2=3.55"
5.7 615 0.0320 1.79 Shallow Concentrated Flow,Shallow Concent.
Nearly Bare&Untilled Kv= 10.0 fps
7.4 715 Total

Basin#9 Type 1l 24-hr 25 yr Ralnfall=6.95"
Prepared by E2S
HydroCADO 10 00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 7
Summary for Pond 1P: Basin #9
Inflow Area= 4.960 ac, 0.00% Impervious, Inflow Depth= 5.45" for 25 yr event
Inflow - 39.91 cfs @ 11.98 hrs, Volume= 2.251 of
Outflow = 15.32 cfs @ 12.12 hrs, Volume= 2.251 af, Atten=62%, Lag=8.1 min
Primary - 15.32 cfs @ 12.12 hrs, Volume= 2.251 of
Routing by Stor-Ind method,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=241.45'@ 12.12 hrs Surf.Area=22,396 sf Storage=49,046 cf
Plug-Flow detention time=632.1 min calculated for 2.250 of(100%of inflow)
Center-of-Mass det.time=633.9 min( 1,399.4-765.5)
Volume Invert Avail Storage Storage Description
#1 239.00' 85,862 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
239.00 17,100 0 0
240.00 19,538 18,319 18,319
241.00 21,478 20,508 38,827
242.00 23,498 22,488 61,315
243.00 25,596 24,547 85,862
Device Routing Invert Outlet Devices
#1 Primary 238.00' 12.0" Round 12"CMP Barrel
L=50.0' CMP, projecting, no headwall, Ke=0.900
Inlet l Outlet Invert--238.00'1237.00' S=0.0200'l' Cc=0.900
n=0.025 Corrugated metal, Flow Area=0.79 sf
#2 Device 1 240.00' 18.0"Horiz. 18"CMP Riser C=0.600
Limited to weir flow at low heads
#3 Device 1 239.00' 0.072 cfs 2.5"Skimmer
#4 Primary 241.00' 10'Secondary Spillway,C=3.27
Offset(feet) 0.00 4.50 14.50 19.00
Height(feet) 1.50 0.00 0.00 1.50
Primary OutFlow Max=14.97 cfs @ 12.12 hrs HW=241.45' (Free Discharge)
=12"CMP Barrel (Barrel Controls 4.21 cfs @ 5.37 fps)
2=-18"CMP Riser (Passes < 10.23 cfs potential flow)
3=2.5"Skimmer (Passes<0.07 cfs potential flow)
4=10'Secondary Spillway (Weir Controls 10.75 cfs @ 1.91 fps)

Watershed #10 Basin #10
(Subcat Reach on Link Routing Diagram for Basin#10
Prepared by E2S
HydroCAD®10.00-26 sfn 07329 0 2020 HydroCAD Software Solutions LLC

L �
Basin#10
Type 1124-hr 2 yr Rainfall=3.55"
Prepared by E2S
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 2
Summary for Subcatchment 1S: Watershed#10
Runoff = 16.73 cfs @ 12.00 hrs, Volume= 0.971 af, Depth= 2.88"
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 2 yr Rainfall=3.55"
Area ac CN Description
4.040 94 Newly graded area HSG D
4.040 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
1.6 100 0.0450 1.04 Sheet Flow, Sheet
n=0.025 P2=3.65"
8.0 759 0.0250 1.58 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare& Untilled Kv= 10.0 fps
9.6 859 Total

i
Basin #10 Type 11 24-hr 2 yr Rainfall=3.55"
Prepared by E2S Page 3
H droCAD®10 00 26 sln 07329 @ 2020 HydroCAD Software Solutions LLC
Summary for Pond 1P: Basin #10
Inflow Area= 4.040 ac, 0.00% Impervious, Inflow Depth = 2.88" for 2 yr event
Inflow = 16.73 cfs @ 12.00 hrs, Volume= 0.971 of
Outflow - 3.75 cfs @ 12.23 hrs, Volume= 0.971 af, Atten=78%, Lag= 13.5 min
Primary = 3.75 cfs @ 12.23 hrs, Volume= 0.971 of
Routing by Stor-Ind method, Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=240.72' @ 12.23 hrs Surf.Area= 13,838 sf Storage=21,480 cf
Plug-Flow detention time=996.1 min calculated for 0.970 of(100%of inflow)
Center-of-Mass det. time= 997.8 min( 1,781.6-783.8 )
Volume Invert Avail.Stora a Storage Description
#1 239.00' 57,153 cf custom Stage Data (Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
239.00 11,050 0 0
240.00 12,496 11,773 11,773
241.00 14,352 13,424 25,197
242.00 15,960 15,156 40,353
243.00 17,640 16,800 57,153
Device Routing Invert Outlet Devices
#1 Primary 238.00' 12.0" Round 12" CMP Barrel
L= 50.0' CMP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert=238.00'/237.00' S=0.0200'/' Cc= 0.900
n=0.025 Corrugated metal, Flow Area=0.79 sf
#2 Device 1 240.00' 18.0" Horiz. 18" CMP Riser C=0.600
Limited to weir flow at low heads
#3 Device 1 239.00' 0.038 cfs 2"Skimmer
#4 Primary 241.00' 10' Secondary Spillway, C=3.27
Offset(feet) 0.00 4.50 14.50 19.00
Height(feet) 1.50 0.00 0.00 1.50
Primary OutFlow Max=3.75 cfs @ 12.23 hrs HW=240.72' (Free Discharge)
12" CMP Barrel (Barrel Controls 3.75 cfs @ 4.77 fps)
2=18.CMP Riser (Passes<7.23 cfs potential flow)
3=2 Skimmer (Passes < 0.04 cfs potential flow)
-10' Secondary Spillway ( Controls 0.00 cfs)

Basin #10 Type 1I 24-hr 10 yr Rainfall=5.9 7" j
Prepared by E2S
HydroCAD®10 00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 4
Summary for Subcatchment IS: Watershed#10
I
Runoff = 25.27 cfs @ 12.00 hrs, Volume= 1.507 af, Depth= 4.48"
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=5.17"
Area(ac) CN Description
4.040 94 Newly graded area, HSG D
4.040 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ftlsec) (cfs)
1.6 100 0.0450 1.04 Sheet Flow, Sheet
n=0.025 P2=3.55"
8.0 759 0.0250 1.58 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare& Until led Kv= 10.0 fps
9.6 859 Total

I
Basin#10 Type 1124-hr 10 yr Rainfall=5.17"
Prepared by E2S Page 5
H droCAD®10 00 26 s/n 07329 @ 2020 HydroCAD Software Solutions LLC
Summary for Pond 1 P: Basin #10
Inflow Area = 4.040 ac, 0.00% Impervious, Inflow Depth = 4.48" for 10 yr event
Inflow = 25.27 cfs @ 12.00 hrs, Volume= 1.507 of
Outflow - 11.45 cfs @ 12.14 hrs, Volume= 1.506 af, Atten= 55%, Lag= 8.4 min
Primary = 11.45 cfs @ 12.14 hrs, Volume= 1.506 of
Routing by Stor-Ind method, Time Span=0.00-120,00 hrs, dt=0.05 hrs
Peak Elev=241.35'@ 12.14 hrs Surf.Area= 14,912 sf Storage=30,476 cf
Plug-Flow detention time=671.4 min calculated for 1.506 of(100%of inflow)
Center-of-Mass det.time= 673.3 min ( 1,445.6 -772.4)
Volume Invert Avall.Stora a Storage Description
Al 239.00' 57,153 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
239.00 11,050 0 0
240.00 12,496 11,773 11,773
241.00 14,352 13,424 25,197
242.00 15,960 15,156 40,353
243.00 17,640 16,800 57,153
Device Routing Invert Outlet Devices
#1 Primary 238.00' 12.0" Round 12" CMP Barrel
L= 50.0' CMP, projecting, no headwall, Ke= 0.900
Inlet/Outlet Invert=238.00'/237.00' S=0.0200'/' Cc= 0.900
n= 0.025 Corrugated metal, Flow Area=0.79 sf
#2 Device 1 240.00' 18.0" Horiz. 18"CMP Riser C=0.600
Limited to weir flow at low heads
#3 Device 1 239.00' 0.038 cfs 2"Skimmer
#4 Primary 241.00' 10' Secondary Spillway, C=3.27
Offset(feet) 0.00 4.50 14.50 19.00
Height(feet) 1.50 0.00 0.00 1.50
Primary Outflow Max=11.34 cfs @ 12.14 hrs HW=241.35' (Free Discharge)
12" CMP Barrel (Barrel Controls 4.15 cfs @ 5.29 fps)
2=18"CMP Riser (Passes< 9.87 cfs potential flow)
LLL3=2"Skimmer (Passes <0.04 cfs potential flow)
=10'Secondary Spillway (Weir Controls 7.19 cfs @ 1.72 fps)

i
Basin #10 Type Il 24-hr 25 yr Rainfall=6.15"
Prepared by E2S
E
HvdroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 6
Summary for Subcatchment 1S: Watershed#10
Runoff = 30.39 cfs @ 12.00 hrs, Volume= 1.833 af, Depth= 5.45"
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=6.15"
Area ac CN Description
4.040 94 Newly graded area, HSG D
4.040 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ftift) (ft/sec) (cfs) --
1.6 100 0.0450 1.04 Sheet Flow, Sheet
n=0.025 P2=3.55"
8.0 759 0.0250 1.58 Shallow Concentrated Flow,Shallow Concent.
Nearly Bare&Untilled Kv= 10.0 fps
9.6 859 Total

I
I
I
Basin
#10 Type !i 24-hr 25 yr Rainfali=6.15"
Prepared by E2S Page 7
HydroCADO 10.00-26 sln 07329 ©2020 H droCAD Software Solutions LLC
Summary for Pond 1 P: Basin#10
Inflow Area= 4.040 ac, 0.00% Impervious, Inflow Depth= 5.45" for 25 yr event
Inflow = 30.39 cfs @ 12.00 hrs, Volume= 1.833 of
Outflow = 18.61 cfs @ 12.11 hrs, Volume= 1.833 af, Atten=39%, Lag=6.4 min
Primary = 18.61 cfs @ 12.11 hrs, Volume= 1.833 of
Routing by Stor-Ind method,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=241.53' @ 12.11 hrs Surf.Area= 15,209 sf Storage=33,271 cf
Plug-Flow detention time=563.4 min calculated for 1.832 of(100%of inflow)
Center-of-Mass det.time=565.3 min ( 1,332.9-767.6 )
Volume Invert Avail.Stora a Storage Description
#1 239.00' 57,153 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
feet s ft cubic-feet cubic feet
239.00 11,050 0 0
240.00 12,496 11,773 11,773
241.00 14,352 13,424 25,197
242.00 15,960 15,156 40,353
243.00 17,640 16,800 57,153
Device Routing Invert Outlet Devices
#1 Primary 238.00' 12.0" Round 12"CMP Barrel
L=50.0' CMP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert--238.00'1237.00' S=0.0200? Cc=0.900
n=0.025 Corrugated metal, Flow Area=0.79 sf
#2 Device 1 240.00' 18.0" Horiz.18"CMP Riser C=0.600
Limited to weir flow at low heads
#3 Device 1 239.00' 0.038 cfs 2"Skimmer
#4 Primary 241.00' 10'Secondary Spillway, C=3.27
Offset(feet) 0.00 4.50 14.50 19.00
Height(feet) 1.50 0.00 0.00 1.50
riT=2=181,
ry OutFlow Max=18.26 cfs @ 12.11 hrs HW=241.52' (Free Discharge)
2 CMP Barrel (Barrel Controls 4.26 cfs @ 5.43 fps)
CMP Riser (Passes< 10.51 cfs potential flow)
3=2"Skimmer (Passes <0.04 cfs potential flow)
4=10'Secondary Spillway (Weir Controls 14.00 cfs @ 2.03 fps)

Watershed #11 Basin #11
� � Routing Diagram for Basin#11
(Suhceit> Roach on Link
Prepared. E2S
HyJroCADC�10.00-26 sln D7329 29 ©202020 HydroCAD Software Solutions LLC

I
Basin#11 Type 1124-hr 2 yr Rainfall=3.55"
Prepared by E2S
H droCAD®10.00-26 s/n 07329 ©2020 H droCAD Software Solutions LLC Page 2
i
Summary for Subcatchment 1S: Watershed#11 '
Runoff = 41.86 cfs @ 11.98 hrs, Volume= 2.233 af, Depth= 2.88" j
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 2 yr Rainfall=3.55"
Area(ac) CN Description
9.290 94 Newly graded area HSG D
9.290 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
_ (min) (feet) (ft/ft) (ft/sec) (cfs
1.7 100 0.0400 0.99 Sheet Flow, Sheet
n=0.025 P2=3.55"
5.1 511 0.0280 1.67 Shallow Concentrated Flow,Shallow Concent.
Nearly Bare& Untilled Kv= 10.0 fps
6.8 611 Total

i
Basin#11
Type 1124-hr 2 yr Rainfall=3.55" i
Prepared by E2S Page 3
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC
Summary for Pond 1 P: Basin#11
Inflow Area = 9.290 ac, 0.00% Impervious, Inflow Depth = 2.88" for 2 yr event,
Inflow = 41.86 cfs @ 11.98 hrs, Volume= 2.233 of
Outflow = 3.78 cfs @ 12.47 hrs, Volume= 2.233 af, Atten=91%, Lag=29.4 min
Primary = 3.78 cfs @ 12.47 hrs, Volume= 2.233 of
Routing by Stor-Ind method, Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=243.77' @ 12.47 hrs Surf.Area= 33,930 sf Storage=55,526 cf
Plug-Flow detention time= 1,065.9 min calculated for 2.232 of(100%of inflow)
Center-of-Mass det.time=1,067.7 min ( 1,848.9-781.2)
Volume Invert Avail.Stora a Storage Description
#1 242.00' 138,528 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
feet s ft cubic-feet cubic feet
242.00 28,600 0 0
243.00 31,616 30,108 30,108
244.00 34,632 33,124 63,232
245.00 37,648 36,140 99,372
246.00 40,664 39,156 138,528
Device Routing. Invert Outlet Devices
#1 Primary 241.00' 12.0" Round 12"CMP Barrel
L=50.0' CMP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert=241.00'1240.00' S=0.0200'/' Cc=0.900
n=0.025 Corrugated metal, Flow Area=0.79 sf
#2 Device 1 243.00' 18.0"Horiz. 18"CMP Riser C=0.600
Limited to weir flow at low heads
#3 Device 1 242.00' 0.110 cfs 3"Skimmer
#4 Primary 244.00' 20'Secondary Spillway,C=3.27
Offset(feet) 0.00 4.50 24.50 29.00
Height(feet) 1.50 0.00 0.00 1.50
riary OutFlow Max=3.78 cfs @ 12.47 hrs HW=243.77' (Free Discharge)
T=12"CMP Barrel (Barrel Controls 3.78 cfs @ 4.81 fps)
CMP Riser (Passes<7.45 cfs potential flow)
t"2=18"
3=3"Skimmer Passes<0.11 cfs potential flow)
4=20'Secondary Spillway (Controls 0.00 cfs)

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Basin#11 Type i124-hr 10 yr Rainfall=5.1 7"
Prepared by E2S
HvdroCAD®10.00-26 sln 07329 O 2020 HydroCAD Software Solutions LLC Page 4
Summary for Subcatchment 1S: Watershed#11
Runoff = 62.39 cfs @ 11.97 hrs, Volume= 3.465 af, Depth= 4.48"
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=5.17"
Area (ac) CN Description
_ 9.290 94 Newly graded area, HSG D
9.290 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
1.7 100 0.0400 0.99 Sheet Flow, Sheet
n=0.025 P2=3.55"
5.1 511 0.0280 1.67 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare&Untilled Kv= 10.0 fps
6.8 611 Total

i
Basin #11 Type ll 24-hr 10 yr Rainfall=5.17"
Prepared by E2S
H droCAD®10 00 26 s/n 07329 @ 2020 HydroCAD Software Solutions LLC Page 5
Summary for Pond 1 P: Basin #11
Inflow Area= 9.290 ac, 0.00% Impervious, Inflow Depth = 4.48" for 10 yr event
Inflow = 62.39 cfs @ 11.97 hrs, Volume= 3.465 of
Outflow = 22.64 cfs @ 12.11 hrs, Volume= 3.465 af, Atten=64%, Lag=8.2 min
Primary = 22.64 cfs @ 12.11 hrs, Volume= 3.465 of
Routing by Stor-Ind method,Time Span= 0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=244.42'@ 12.11 hrs Surf.Area= 35,887 sf Storage=78,272 cf
Plug-Flow detention time=734.1 min calculated for 3.463 of(100% of inflow)
Center-of-Mass det.time=736.0 min ( 1,505.8-769.8 )
Volume Invert Avail Storage Storage Description
#1 242.00' 138,528 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
242.00 28,600 0 0
243.00 31,616 30,108 30,108
244.00 34,632 33,124 63,232
245.00 37,648 36,140 99,372
246.00 40,664 39,156 138,528
Device Routing Invert Outlet Devices
#1 Primary 241.00' 12.0" Round 12"CMP Barrel
L=50.0' CMP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert=241.00'/240.00' S=0.0200'/' Cc=0.900
n=0.025 Corrugated metal, Flow Area= 0.79 sf
#2 Device 1 243.00' 18.0"Horiz. 18"CMP Riser C=0.600
Limited to weir flow at low heads
#3 Device 1 242.00' 0.110 cfs 3"Skimmer
#4 Primary 244.00' 20'Secondary Spillway,C=3.27
Offset(feet) 0.00 4.50 24.50 29.00
Height(feet) 1.50 0.00 0.00 1.50
Primary Outflow Max=22.14 cfs @ 12.11 hrs HW=244.41' (Free Discharge)
t12"CMP Barrel (Barrel Controls 4.19 cfs @ 5.34 fps)
-2=18"CMP Riser (Passes< 10.10 cfs potential flow)
L3=3" Skimmer (Passes <0.11 cfs potential flow)
4=20'Secondary Spillway (Weir Controls 17.95 cfs @ 1.95 fps)

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Basin#11 Type 1124-hr 25 yr Rainfall=6.15"
Prepared by E2S Pa e 6
HvdroCAD®10.00-26 s/n 07329 O 2020 HydroCAD Software Solutions LLC
Summary for Subcatchment 1S: Watershed#11
Runoff — 75.01 cfs @ 11.97 hrs, Volume= 4.216 af, Depth= 5.45"
Runoff by SCS TR-20 method, UH=SCS, Wei9 hted-CN,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Type II 24-hr 25 yr Rainfall=6.15"
Area ac CN Descri tion
9.290 94 Newlv qraded area HSG D
9.290 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
min feet ft/ft ft/sec cfs
1.7 100 0.0400 0.99 Sheet Flow, Sheet
n=0.025 P2=3.55"
5.1 511 0.0280 1.67 Shalloware&Untilledd Flow
W
Nearly10.0 fps
Shall
Concent.
6.8 611 Total

i
Basin#11
Type 11 24-hr 25 yr Rainfall=6.15"
Prepared by E2S
HydroCADO 10 00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 7 i
Summary for Pond 1 P: Basin#11
Inflow Area= 9.290 ac, 0.00% Impervious, Inflow Depth= 5.45" for 25 yr event
Inflow = 75.01 cfs @ 11.97 hrs, Volume= 4.216 of
Outflow = 41.61 cfs @ 12.07 hrs, Volume= 4.215 af, Atten=45%, Lag=5.9 min
Primary - 41.61 cfs @ 12.07 hrs, Volume= 4.215 of
Routing by Stor-Ind method,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=244.65'@ 12.07 hrs Surf.Area=36,607 sf Storage=86,894 cf
Plug-Flow detention time=619.5 min calculated for 4.214 of(100% of inflow)
Center-of-Mass det.time=621.5 min( 1,386.4-765.0)
Volume Invert Avail Storage Storage Description
#1 242.00' 138,528 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq ft) (cubic-feet) (cubic-feet
242.00 28,600 0 0
243.00 31,616 30,108 30,108
244.00 34,632 33,124 63,232
245.00 37,648 36,140 99,372
246.00 40,664 39,156 1380528
Device Routing Invert Outlet Devices
#1 Primary 241.00' 12.0" Round 12"CMP Barrel
L=50.0' CMP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert=241.00'/240.00' S=0.0200'P Cc=0.900
n=0.025 Corrugated metal, Flow Area=0.79 sf
#2 Device 1 243.00' 18.0"Horiz. 18"CMP Riser C=0.600
Limited to weir flow at low heads
#3 Device 1 242.00' 0.110 cfs 3"Skimmer
#4 Primary 244.00' 20'Secondary Spillway,C=3.27
Offset(feet) 0.00 4.50 24.50 29.00
Height(feet) 1.50 0.00 0.00 1.50
\7ary OutFlow Max=40.15 cfs @ 12.07 hrs HW=244.64' (Free Discharge)
=12 CMP Barrel (Barrel Controls 4.33 cfs @ 5.51 fps)
-18"CMP Riser (Passes< 10.89 cfs potential flow)
3=3"Skimmer (Passes<0.11 cfs potential flow)
4=20'Secondary Spillway (Weir Controls 35.82 cfs @ 2.36 fps)

Watershed #12 Basin #12
Subcat Reach - .on._, Llllk Routing Diagram for Basin#12
Prepare20d by E2S
HydroCAD®10.00-26 sin 07320 ®20 HydroCAD Software Solutions LLC

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Basin#12 Type 11 24-hr 2 yr Rainfall=3.55"
Prepared by E2S
H ydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 2
Summary for Subcatchment IS: Watershed#12
Runoff = 132.04 cfs @ 12.03 hrs, Volume= 8.245 af, Depth= 2.88"
CS, Weighted-CN,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Runoff by SCS TR-20 method, UH=S
Type I) 24-hr 2 yr Rainfall=3.55"
Area ac CN Description
34.300 94 Newly graded area HSG D
34.300 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs
1.6 100 0.0480 1.07 Sheet Flow, Sheet
n=0.025 P2=3.55"
10.3 1,053 0.0290 1.70 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare&Untilled Kv= 10.0 fps
11.9 1,153 Total

R �
Basin#12 Type 11 24-hr 2 yr Rainfall=3.55"
Prepared by E2S
HydroCAD@ 10 00 26 s!n 07329 @ 2020 HydroCAD Software Solutions LLC Pace 3
Summary for Pond 1 P: Basin #12
Inflow Area = 34.300 ac, 0.00% Impervious, Inflow Depth = 2.88" for 2 yr event
Inflow = 132.04 cfs @ 12.03 hrs, Volume= 8.245 of
Outflow = 4.28 cfs @ 14.33 hrs, Volume= 7.355 af, Atten=97%, Lag= 137.7 min
Primary = 4.28 cfs @ 14.33 hrs, Volume= 7.355 of
Routing by Stor-Ind method, Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=232.55'@ 14.33 hrs Surf.Area= 102,715 sf Storage=243,047 cf
Plug-Flow detention time= 1,930.9 min calculated for 7.352 of(89% of inflow)
Center-of-Mass det. time= 1,878.4 min (2,664.3-785.9 )
Volume Invert Avail Storage Storage Description
#1 230.00' 632,496 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
230.00 87,500 0 0
231.00 93,472 90,486 90,486
232.00 99,444 96,458 186,944
233.00 105,416 102,430 289,374
234.00 111,388 108,402 397,776
235.00 117,360 114,374 512,150
236.00 123,332 120,346 632,496
Device Routing Invert Outlet Devices
#1 Primary 229.00' 12.0" Round 12" CMP Barrel
L=50.0' CMP, projecting, no headwall, Ke= 0.900
Inlet/Outlet Invert-- 229.00'/228.00' S=0.0200? Cc=0.900
n= 0.025 Corrugated metal, Flow Area=0.79 sf
#2 Device 1 232.00' 18.0"Horiz. 18"CMP Riser C= 0.600
Limited to weir flow at low heads
#3 Device 1 230.00' 0.230 cfs 4"Skimmer X 2.00
#4 Primary 233.00' 20' Secondary Spillway, C=3.27
Offset(feet) 0.00 4.50 24.50 29.00
Height(feet) 1.50 0.00 0.00 1.50
rimary OutFlow Max=4.28 cfs @ 14.33 hrs HW=232.55' (Free Discharge)
1 12"CMP Barrel (Barrel Controls 4.28 cfs @ 5.45 fps)
2=18"CMP Riser (Passes <6.25 cfs potential flow)
3=4"Skimmer (Passes <0.46 cfs potential flow)
4=20'Secondary Spillway (Controls 0.00 cfs)

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Basin #12 Type//24-hr 90 yr Rainfall=5.17"
Prepared by E2S
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 4
Summary for Subcatchment IS: Watershed#12
Runoff = 199.57 cfs @ 12.03 hrs, Volume= 12.793 af, Depth= 4.48"
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=5.17"
Area(ac) CN Description
34.300 94 Newly graded area HSG D
34.300 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
_ (min) (feet) (ft/ft) (ft/sec) (cfs
1.6 100 0.0480 1.07 Sheet Flow,Sheet
n=0.025 P2=3.55"
10.3 1,053 0.0290 1.70 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare& Until led Kv= 10.0 fps
11.9 1,153 Total

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Basin #12 Type 1l 24-hr 10 yr Rainfall=5.17"
Prepared by E2S
HydroCAD®10 00 26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 5
Summary for Pond 1 P: Basin #12
Inflow Area = 34.300 ac, 0.00% Impervious, Inflow Depth = 4.48" for 10 yr event
Inflow = 199.57 cfs @ 12.03 hrs, Volume= 12.793 of
Outflow = 24.38 cfs @ 12.49 hrs, Volume= 11.784 af, Atten=88%, Lag=27.3 min
Primary = 24.38 cfs @ 12.49 hrs, Volume= 11.784 of
Routing by Stor-Ind method, Time Span=0.00-120.00 hrs, dt= 0.05 hrs
Peak Elev=233.43'@ 12.49 hrs Surf.Area= 107,999 sf Storage=336,258 cf
Plug-Flow detention time= 1,316.2 min calculated for 11.779 of(92% of inflow)
Center-of-Mass det. time= 1,275.0 min ( 2.049.5-774.5 )
Volume Invert Avail Storage Storage Description
#1 230.00' 632,496 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cublo-feet)
230.00 87,500 0 0
231.00 93,472 90,486 90,486
232.00 99,444 96,458 186,944
233.00 105,416 102,430 289,374
234.00 111,388 108,402 397,776
235.00 117,360 114,374 512,150
236.00 123,332 120,346 632,496
Device Routing Invert Outlet Devices
#1 Primary 229.00' 12.0" Round 12" CMP Barrel
L= 50.0' CMP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert--229.00'/228.00' S=0.0200 7' Cc= 0.900
n=0.025 Corrugated metal, Flow Area=0.79 sf
#2 Device 1 232.00' 18.0" Horiz. 18" CMP Riser C=0.600
Limited to weir flow at low heads
#3 Device 1 230.00' 0.230 cfs 4"Skimmer X 2.00
#4 Primary 233.00' 20' Secondary Spillway, C=3.27
Offset(feet) 0.00 4.50 24.50 29.00
Height(feet) 1.50 0.00 0.00 1.50
primary OutFlow Max=24.32 cfs @ 12.49 hrs HW=233.43' (Free Discharge)
1=12"CMP Barrel (Barrel Controls 4.78 cfs @ 6.09 fps)
2=18"CMP Riser (Passes< 10.18 cfs potential flow)
3=4"Skimmer (Passes < 0.46 cfs potential flow)
=20'Secondary Spillway (Weir Controls 19.54 cfs @ 2.00 fps)

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1
Basin#12 Type 1J 24-hr 25 yr Rainfall=6.15"
Prepared by E2S
HydroCAD410.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 6
Summary for Subcatchment 1S: Watershed#12
Runoff — 240.06 cfs @ 12.03 hrs, Volume= 15.564 af, Depth= 5.45"
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=6.15"
_ Area(ac) CN Description
34.300 94 Newly graded area, HSG D
34.300 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (fUft) (ft/sec) (cfs)
1.6 100 0.0480 1.07 Sheet Flow,Sheet
n=0.025 P2=3.55"
10.3 1,053 0.0290 1.70 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare& Untilled Kv= 10.0 fps
11.9 1,153 Total

t: RA
Basin #12 Type 1124-hr 25 yr Rainfall=6.15"
Prepared by E2S
HydroCADO 10.00-26 s/n 07329 O 2020 HydroCAD Software Solutions LLC Page 7
Summary for Pond 1 P: Basin#12
Inflow Area= 34.300 ac, 0.00% Impervious, Inflow Depth = 5.45" for 25 yr event
Inflow = 240.06 cfs @ 12.03 hrs, Volume= 15.564 of
Outflow = 59.69 cfs @ 12.27 hrs, Volume= 14.523 af, Atten=75%, Lag= 14.6 min
Primary = 59.69 cfs @ 12.27 hrs, Volume= 14.523 of
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Routing by Stor-Ind method, Time Span=0.00-120.00 hrs,dt=0.05 hrs
Peak Elev=233.83'@ 12.27 hrs Surf.Area= 110,390 sf Storage=379,666 cf
Plug-Flow detention time= 1,093.5 min calculated for 14.523 of(93%of inflow)
Center-of-Mass det. time= 1,055.6 min ( 1,825.3-769.7)
Volume Invert Avail.Storage Storage Description
#1 230.00' 632,496 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
230.00 87,500 0 0
i
231.00 93,472 90,486 90,486
232.00 99,444 96,458 186,944
233.00 105,416 102,430 289,374
234.00 111,388 108,402 397,776
235.00 117,360 114,374 512,150
236.00 123,332 120,346 632,496
Device Routing Invert Outlet Devices
#1 Primary 229.00' 12.0" Round 12"CMP Barrel
L=50.0' CMP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert=229.00'/228.00' S=0.0200 7' Cc=0.900
n=0.025 Corrugated metal, Flow Area=0.79 sf
#2 Device 1 232.00' 18.0"Horiz. 18"CMP Riser C=0.600
Limited to weir flow at low heads
#3 Device 1 230.00' 0.230 cfs 4"Skimmer X 2.00
#4 Primary 233.00' 20'Secondary Spillway,C=3.27
Offset(feet) 0.00 4.50 24.50 29.00
Height(feet) 1.50 0.00 0.00 1.50
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Primary OutFlow Max=59.20 cfs @ 12.27 hrs HW=233.83' (Free Discharge)
1=12 CMP Barrel (Barrel Controls 4.99 cfs @ 6.35 fps)
1:2_18"CMP Riser (Passes < 11.51 cfs potential flow)
3 4"Skimmer (Passes< 0.46 cfs potential flow)
4=20'Secondary Spillway (Weir Controls 54.21 cfs @ 2.62 fps)