20230804_ESC_Calculations

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ENGINEERING & ENVIRONMENTAL SCIENCE COMPANY
3008 ANDERSON DRIVE,SURE 102
RALEIGH,NC 27609
[phone]
July 21, 2023
Mr. Steve Wyse RECEIVED
General Shale Brick, Inc.
300 Brick Plant Rd. tL'� 0 ^ 2023
Moncure,NC 27559
LAND QUALITY
Re: Erosion Control Evaluation MINING PROGRAM
Mine Permit Modification
Brickhaven Mine#2 Tract B
Permit No.19-08
Chatham County,NC
Dear Mr. Wyse:
Engineering&Environmental Science Company(EIS) has completed the evaluation of the mine
renewal 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 I
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 j
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 of 2:1 (H: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. },
i
6

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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 riser/barrel 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 approximately
2-3 days.
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-year rain 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,
JAIL'
T. Patrick Shillington, .E.
President
Attachment A: Figures
Attachment B: Calculations
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Attachment A;:Figures
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ENGINEERING&ENVIRONMENTAL
SCIENCE COMPANY
2 3008 ANDERSON DR.,SUITE 102
N J RALEIGH,NORTH CAROLINA 27609
J [phone]
USGS Map UATE:
Brickhaven Mine#2 Tract B "21
Mine Permit No. 19-08
Scale:V-2000' Chatham Co., NC 1

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Hydrological N
Soil Symbol Soil Name Group
Who White Store D
CcB Carbonton C
MCC Malladoni C Scale:I"=I000'
2 ENGINEERING&ENVIRONMENTAL
WhC While Store D SCIENCE COMPANY
3008 ANDERSON DR.,SUITE 102
Pea Peawick D RALEIGH,NORTH CAROLINA 27609
[phone]
PeA Peawick D
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WhB White Store D USDA Soil Survey 90121
Brickhaven Mine#2 Tract B
ChA Chewacla C Mine Permit No. 19-08 :2 ]
UdCudorlhents B Chatham Co., NC

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Atfachinent B Calculati
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1S v 1P
Watershed #1 Basin #1
Subcat Reach on Link Routing Diagram for Basin#1
Prepared by(enter your company name here), Printed 8/1/2023
HydroCAD®10.00-26 sin 07329 0 2020 HydroCAD Software Solutions LLC

Basin#1 Type 1124-hr 2 yr Rainfall=3.55"
Prepared by{enter your company name here) Printed 8/1/2023
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page-2
Summary for Subcatchment 1S: Watershed#1
Runoff = 15.50 cfs @ 12.05 hrs, Volume= 1.017 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
4.230 94 Newly graded area, HSG D
4.230 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
4.0 100 0.0180 0.41 Sheet Flow, Sheet
Fallow n=0.050 P2=3.55"
9.6 795 0.0190 1.38 Shallow Concentrated Flow, Shallow Concent.
_ Nearly Bare& Untilled Kv= 10.0 fps
13.6 895 Total

Basin #1 Type 11 24-hr 2 yr Rainfall=3.55"
Prepared by{enter your company name here) Printed 8/1/2023
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 3
Summary for Pond 1 P: Basin #1
Inflow Area= 4.230 ac, 0.00% Impervious, Inflow Depth = 2.88" for 2 yr event
Inflow - 15.50 cfs @ 12.05 hrs, Volume= 1.017 of
Outflow = 3.85 cfs @ 12.32 hrs, Volume= 1.017 af, Atten=75%, Lag= 16.5 min
Primary = 3.85 cfs @ 12.32 hrs, Volume= 1.017 of
Routing by Stor-Ind method, Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=241.87'@ 12.32 hrs Surf.Area= 12,858 sf Storage=21,789 cf
Plug-Flow detention time=856.2 min calculated for 1.016 of(100%of inflow)
Center-of-Mass det. time=858.1 min ( 1,645.6-787.5 )
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=0.02007' 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=3.85 cfs @ 12.32 hrs HW=241.87' (Free Discharge)
=12"CMP Barrel (Barrel Controls 3.85 cfs @ 4.90 fps)
2=18"CMP Riser (Passes< 7.93 cfs potential flow)
3=2"Skimmer (Passes <0.04 cfs potential flow)
4=10'Secondary Spillway ( Controls 0.00 cfs)

Basin #1 Type/1 24-hr 10 yr Rainfall=5.17"
Prepared by{enter your company name here} Printed 8/1/2023
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 4
Summary for Subcatchment IS: Watershed#1
Runoff = 23.44 cfs @ 12.05 hrs, Volume= 1.578 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
4.230 94 Newly graded area, HSG D
4.230 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
_ (min) (feet) (ft/ft) (ft/sec) (cfs)
4.0 100 0.0180 0.41 Sheet Flow, Sheet
Fallow n=0.050 P2=3.55"
9.6 795 0.0190 1.38 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare&Untilled Kv= 10.0 fps
13.6 895 Total

i
Basin #1 Type//24-hr 10 yr Rainfall=5.17"
Prepared by(enter your company name here) Printed 8/1/2023
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 5
Summary for Pond 1 P: Basin #1
Inflow Area= 4.230 ac, 0.00% Impervious, Inflow Depth= 4.48" for 10 yr event
Inflow = 23.44 cfs @ 12.05 hrs, Volume= 1.578 of
Outflow = 13.48 cfs @ 12.18 hrs, Volume= 1.578 af, Atten=43%, Lag=8.2 min
Primary - 13.48 cfs @ 12.18 hrs, Volume= 1.578 of
Routing by Stor-Ind method, Time Span=0.00-120.00 hrs, dt= 0.05 hrs
Peak Elev=242.41' @ 12.18 hrs Surf.Area= 13,573 sf Storage=28,962 cf
Plug-Flow detention time=577.5 min calculated for 1.577 of(100%of inflow)
Center-of-Mass det. time=579.5 min ( 1,355.6-776.1 )
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'/' 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=13.30 cfs @ 12.18 hrs HW=242.40' (Free Discharge)
=12"CMP Barrel (Barrel Controls 4.19 cfs @ 5.33 fps)
2=18"CMP Riser (Passes< 10.07 cfs potential flow)
3=2"Skimmer (Passes <0.04 cfs potential flow)
4=10'Secondary Spillway (Weir Controls 9.11 cfs @ 1.83 fps)

Basin #1 Type it 24-hr 25 yr Rainfaii=6.15"
Prepared by jenter your company name here} Printed 8/1/2023
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 6
Summary for Subcatchment IS: Watershed#1
Runoff - 28.21 cfs @ 12.05 hrs, Volume= 1.919 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
4.230 94 Newly graded area, HSG D
4.230 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
4.0 100 0.0180 0.41 Sheet Flow,Sheet
Fallow n=0.050 P2=3.55"
9.6 795 0.0190 1.38 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare&Untilled Kv= 10.0 fps
13.6 895 Total

Basin #1 Type 1124-hr 25 yr Rainfall=6.15"
Prepared by{enter your company name here} Printed 8/1/2023
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 7
Summary for Pond 1 P: Basin #1
Inflow Area= 4.230 ac, 0.00% Impervious, Inflow Depth = 5.45" for 25 yr event
Inflow - 28.21 cfs @ 12.05 hrs, Volume= 1.919 of
Outflow - 19.88 cfs @ 12.15 hrs, Volume= 1.919 af, Atten=30%, Lag=6.5 min
Primary = 19.88 cfs @ 12.15 hrs, Volume= 1.919 of
Routing by Stor-Ind method,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=242.56'@ 12.15 hrs Surf.Area= 13,779 sf Storage=31,086 cf
Plug-Flow detention time=485.2 min calculated for 1.919 of(100%of inflow)
Center-of-Mass det. time=487.2 min( 1,258.5-771.3)
_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'/' 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=19.72 cfs @ 12.15 hrs HW=242.56' (Free Discharge)
=12"CMP Barrel (Barrel Controls 4.28 cfs @ 5.45 fps)
2=18"CMP Riser (Passes < 10.62 cfs potential flow)
3=2"Skimmer (Passes <0.04 cfs potential flow)
4=10'Secondary Spillway (Weir Controls 15.44 cfs @ 2.07 fps)

1S v � r
Watershed #2 Basin #2
Subcat Reach on Linl< Routing Diagram for Basin#2
Prepared by(enter your company name here), Printed 8/1/2023
HydroCADD 10.00-26 s/n 07329 ®2020 HydroCAD Software Solutions LLC

r T
Basin #2 Type 11 24-hr 2 yr Rainfall=3.55"
Prepared by{enter your company name here) Printed 8/1/2023
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 2
Summary for Subcatchment 1S: Watershed#2
Runoff = 41.91 cfs @ 12.15 hrs, Volume= 3.509 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
14.600 94 Newly graded area, HSG D
14.600 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
3.7 100 0.0220 0.45 Sheet Flow,Sheet
Fallow n=0.050 P2= 3.55"
18.7 1,423 0.0160 1.26 Shallow Concentrated Flow,Shallow Concent.
Nearly Bare& Untilled Kv= 10.0 fps
22.4 1,523 Total

T
Basin #2 Type 11 24-hr 2 yr Rainfall=3.55"
Prepared by{enter your company name here} Printed 8/1/2023
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 3
Summary for Pond 1 P: Basin #2
Inflow Area= 14.600 ac, 0.00% Impervious, Inflow Depth = 2.88" for 2 yr event
Inflow = 41.91 cfs @ 12.15 hrs, Volume= 3.509 of
Outflow = 4.47 cfs @ 12.98 hrs, Volume= 3.122 af, Atten=89%, Lag=49.9 min
Primary = 4.47 cfs @ 12.98 hrs, Volume= 3.122 of
Routing by Stor-Ind method,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=232.88'@ 12.98 hrs Surf.Area= 34,464 sf Storage=90,171 cf
Plug-Flow detention time= 559.9 min calculated for 3.121 of(89%of inflow)
Center-of-Mass det. time= 507.1 min( 1,302.7-795.6 )
Volume Invert Avail Storage Storage Description
#1 230.00' 168,078 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 30,276 29,163 29,163
232.00 32,505 31,391 60,554
233.00 34,728 33,617 94,170
234.00 36,954 35,841 130,011
235.00 39,180 38,067 168,078
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" 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=4.47 cfs @ 12.98 hrs HW=232.88' (Free Discharge)
=12"CMP Barrel (Barrel Controls 4.47 cfs @ 5.70 fps)
2=18"CMP Riser (Passes< 11.67 cfs potential flow)
3=2"Skimmer (Passes <0.04 cfs potential flow)
4=20' Secondary Spillway ( Controls 0.00 cfs)

Basin #2 Type 1124-hr 10 yrRainfall=5.17"
Prepared by{enter your company name here} Printed 8/1/2023
HydroCAD®10 00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 4
Summary for Subcatchment IS: Watershed#2
Runoff = 63.55 cfs @ 12.14 hrs, Volume= 5.446 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
14.600 94 Newly graded area, HSG D
14.600 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
3.7 100 0.0220 0.45 Sheet Flow,Sheet
Fallow n=0.050 P2=3.55"
18.7 1,423 0.0160 1.26 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare& Untilled Kv= 10.0 fps
22.4 1,523 Total

Basin #2 Type 11 24-hr 10 yr Rainfall=5.17"
Prepared by(enter your company name here) Printed 8/1/2023
HydroCADO 10 00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 5
Summary for Pond 1 P: Basin #2
Inflow Area= 14.600 ac, 0.00% Impervious, Inflow Depth = 4.48" for 10 yr event
Inflow = 63.55 cfs @ 12.14 hrs, Volume= 5.446 of
Outflow = 30.64 cfs @ 12.39 hrs, Volume= 5.057 af, Atten=52%, Lag= 14.8 min
Primary = 30.64 cfs @ 12.39 hrs, Volume= 5.057 of
Routing by Stor-Ind method,Time Span=0.00-120.00 hrs, dt= 0.05 hrs
Peak Elev=233.52' @ 12.39 hrs Surf.Area=35,878 sf Storage= 112,684 cf
Plug-Flow detention time=398.3 min calculated for 5.055 of(93%of inflow)
Center-of-Mass det. time=360.8 min( 1,145.0-784.2 )
Volume Invert Avail Storage Storage Description
#1 230.00' 168,078 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 30,276 29,163 29,163
232.00 32,505 31,391 60,554
233.00 34,728 33,617 94,170
234.00 36,954 35,841 130,011
235.00 39,180 38,067 168,078
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=30.45 cfs @ 12.39 hrs HW=233.51' (Free Discharge)
1=12"CMP Barrel (Barrel Controls 4.82 cfs @ 6.14 fps)
L,
CMP Riser (Passes < 13.49 cfs potential flow)
3=2"Skimmer (Passes <0.04 cfs potential flow)
4=20'Secondary Spillway (Weir Controls 25.62 cfs @ 2.16 fps)

Basin #2 Type//24-hr 25 yr Rainfali=6.15"
Prepared by{enter your company name here} Printed 8/1/2023
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 6
Summary for Subcatchment 1S: Watershed#2
Runoff = 76.52 cfs @ 12.14 hrs, Volume= 6.625 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
14.600 94 Newly graded area, HSG D
14.600 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
3.7 100 0.0220 0.45 Sheet Flow,Sheet
Fallow n=0.050 P2=3.55"
18.7 1,423 0.0160 1.26 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare& Untilied Kv= 10.0 fps
22.4 1,523 Total

s
Basin#2 Type //24-hr 25 yr Rainfall=6.15"
Prepared by(enter your company name here) Printed 8/1/2023
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 7
Summary for Pond 'I P: Basin #2
Inflow Area = 14.600 ac, 0.00% Impervious, Inflow Depth= 5.45" for 25 yr event
Inflow = 76.52 cfs @ 12.14 hrs, Volume= 6.625 of
Outflow = 49.35 cfs @ 12.32 hrs, Volume= 6.236 af, Atten=36%, Lag= 10.6 min
Primary = 49.35 cfs @ 12.32 hrs, Volume= 6.236 of
Routing by Stor-Ind method,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=233.73'@ 12.32 hrs Surf.Area=36,354 sf Storage= 120,348 cf
Plug-Flow detention time=341.6 min calculated for 6.233 of(94%of inflow)
Center-of-Mass det. time=309.8 min ( 1,089.3-779.4)
Volume Invert Avail Storage Storage Description
#1 230.00' 168,078 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 30,276 29,163 29,163
232.00 32,505 31,391 60,554
233.00 34,728 33,617 94,170
234.00 36,954 35,841 130,011
235.00 39,180 38,067 168,078
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 1 231.00' 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=48.59 cfs @ 12.32 hrs HW=233.72' (Free Discharge)
=12"CMP Barrel (Barrel Controls 4.93 cfs @ 6.28 fps)
2=18"CMP Riser (Passes < 14.04 cfs potential flow)
3=2"Skimmer (Passes<0.04 cfs potential flow)
4=20'Secondary Spillway (Weir Controls 43.65 cfs @ 2.48 fps)

Watershed #3 Basin #3
Subcal Reach A
Link Routing Diagram for Basin#3
Prepared by{enter your company name here}, Printed 8/1/2023
HydroCAD®10.00-26 sln 07329 0 2020 HydroCAD Sofhwre Solutions LLC

Basin #3 Type 1124-hr 2 yr Rainfall=3.55"
Prepared by(enter your company name here} Printed 8/1/2023
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 2
Summary for Subcatchment 1 S: Watershed#3
Runoff = 25.96 cfs @ 12.01 hrs, Volume= 1.534 A 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
6.380 94 Newly graded area, HSG D
6.380 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
_ (min) (feet) (ft/ft) (fdsec) (cfs)
5.1 100 0.0100 0.33 Sheet Flow, Sheet
Fallow n=0.050 P2=3.55"
5.0 448 0.0220 1.48 Shallow Concentrated Flow, Shallow Concent.
_ Nearly Bare& Untilled Kv= 10.0 fps
10.1 548 Total

A
Basin #3 Type 1124-hr 2 yr Rainfall=3.55"
Prepared by{enter your company name here} Printed 8/1/2023
HydroCADO 10 00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 3
Summary for Pond 1 P: Basin #3
Inflow Area= 6.380 ac, 0.00% Impervious, Inflow Depth= 2.88" for 2 yr event
Inflow = 25.96 cfs @ 12.01 hrs, Volume= 1.534 of
Outflow = 3.85 cfs @ 12.35 hrs, Volume= 1.534 af, Atten=85%, Lag=20.3 min
Primary - 3.85 cfs @ 12.35 hrs, Volume= 1.534 of
Routing by Stor-Ind method,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=240.87'@ 12.35 hrs Surf.Area=20,312 sf Storage=35,113 cf
Plug-Flow detention time=640.0 min calculated for 1.533 of(100%of inflow)
Center-of-Mass det. time=641.1 min ( 1,425.3-784.2 )
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' 0.110 cfs 3"Skimmer
#4 Primary 241.00' 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=3.85 cfs @ 12.35 hrs HW=240.87' (Free Discharge)
=12"CMP Barrel (Barrel Controls 3.85 cfs @ 4.90 fps)
2=18"CMP Riser (Passes < 7.95 cfs potential flow)
3=3"Skimmer (Passes <0.11 cfs potential flow)
=20'Secondary Spillway ( Controls 0.00 cfs)

Basin #3 Type 1124-hr 10 yr Rainfall=5.17"
Prepared by{enter your company name here} Printed 8/1/2023
HydroCADO 10 00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 4
Summary for Subcatchment IS: Watershed#3
Runoff = 39.22 cfs @ 12.01 hrs, Volume= 2.380 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
6.380 94 Newly graded area, HSG D
6.380 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs
5.1 100 0.0100 0.33 Sheet Flow, Sheet
Fallow n=0.050 P2=3.55"
5.0 448 0.0220 1.48 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare&Untilled Kv= 10.0 fps
10.1 548 Total

I
Basin #3 Type 11 24-hr 10 yr Rainfall=5.17"
Prepared by{enter your company name here} Printed 8/1/2023
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Pa
4e 5
Summary for Pond 1P: Basin #3
Inflow Area= 6.380 ac, 0.00% Impervious, Inflow Depth = 4.48" for 10 yr event
Inflow = 39.22 cfs @ 12.01 hrs, Volume= 2.380 of
Outflow = 22.62 cfs @ 12.12 hrs, Volume= 2.380 af, Atten=42%, Lag=6.9 min
Primary = 22.62 cfs @ 12.12 hrs, Volume= 2.380 of
Routing by Stor-Ind method,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=241.42'@ 12.12 hrs Surf.Area=21,248 sf Storage=46,552 cf
Plug-Flow detention time=442.8 min calculated for 2.379 of(100% of inflow)
Center-of-Mass det. time=443.9 min ( 1,216.8-772.8)
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 7' 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' 0.110 cfs 3"Skimmer
#4 Primary 241.00' 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=21.75 cfs @ 12.12 hrs HW=241.40' (Free Discharge)
E=1=12"CMP Barrel (Barrel Controls 4.19 cfs @ 5.33 fps)
2=18"CMP Riser (Passes< 10.08 cfs potential flow)
3=3"Skimmer (Passes <0.11 cfs potential flow)
4=20'Secondary Spillway (Weir Controls 17.56 cfs @ 1.94 fps)

Basin #3 Type 1l 24-hr 25 yr Rainfall=6. It
Prepared by(enter your company name here) Printed 8/1/2023
HydroCAD®10 00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 6
Summary for Subcatchment IS: Watershed #3
Runoff = 47.17 cfs @ 12.01 hrs, Volume= 2.895 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 --
_ 6.380 94 Newly graded area, HSG D
6.380 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
5.1 100 0.0100 0.33 Sheet Flow, Sheet
Fallow n=0.050 P2=3.55"
5.0 448 0.0220 1.48 Shallow Concentrated Flow,Shallow Concent.
Nearly Bare&Untilled Kv= 10.0 fps
10.1 548 Total

Basin#3 Type 11 24-hr 25 yr Rainfall=6. 5"
Prepared by{enter your company name here} Printed 8/1/2023
HydroCADO 10.00-26 s/n 07329 O 2020 HydroCAD Software Solutions LLC Page 7
Summary for Pond 1 P: Basin #3
Inflow Area= 6.380 ac, 0.00% Impervious, Inflow Depth = 5.45" for 25 yr event
Inflow = 47.17 cfs @ 12.01 hrs, Volume= 2.895 of
Outflow = 34.55 cfs @ 12.10 hrs, Volume= 2.895 af, Atten=27%, Lag= 5.2 min
Primary = 34.55 cfs @ 12.10 hrs, Volume= 2.895 of
Routing by Stor-Ind method,Time Span=0.00-120.00 hrs, dt= 0.05 hrs
Peak Elev=241.57'@ 12.10 hrs Surf.Area=21,514 sf Storage=49,868 cf
Plug-Flow detention time=378.0 min calculated for 2.895 of(100%of inflow)
Center-of-Mass det. time=377.5 min ( 1,145.5-768.0)
Volume Invert Avaii 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' 0.110 cfs 3"Skimmer
#4 Primary 241.00' 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=34.22 cfs @ 12.10 hrs HW=241.57' (Free Discharge)
=22'CMP Barrel (Barrel Controls 4.29 cfs @ 5.46 fps)
=18"CMP Riser (Passes< 10.66 cfs potential flow)
3=3"Skimmer (Passes <0.11 cfs potential flow)
4=20'Secondary Spillway (Weir Controls 29.93 cfs @ 2.25 fps)

1S
Watershed #4 Basin #4
Subcat Reach on Linl< Routing Diagram for Basin#4
Prepared by(enter your company name here), Printed 8/1/2023
HydroCADO 10.00-26 sln 07329 ©2020 HydroCAD Software Solutions LLC

Basin #4 Type 1124-hr 2 yr Rainfall=3.55"
Prepared by{enter your company name here} Printed 8/1/2023
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 2
Summary for Subcatchment IS: Watershed#4
Runoff = 25.75 cfs @ 11.99 hrs, Volume= 1.406 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
5.850 94 Newly graded area, HSG D
5.850 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
3.4 100 0.0280 0.49 Sheet Flow, Sheet
Fallow n=0.050 P2=3.55"
4.3 407 0.0250 1.58 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare& Untilled Kv= 10.0 fps
7.7 507 Total

i
Basin #4 Type II 24-hr 2 yr Rainfall=3.55"
Prepared by{enter your company name here} Printed 8/1/2023
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 3
Summary for Pond 1 P: Basin #4
Inflow Area= 5.850 ac, 0.00% Impervious, Inflow Depth = 2.88" for 2 yr event
Inflow = 25.75 cfs @ 11.99 hrs, Volume= 1.406 of
Outflow = 3.74 cfs @ 12.26 hrs, Volume= 1.406 af, Atten=85%, Lag= 16.7 min
Primary - 3.74 cfs @ 12.26 hrs, Volume= 1.406 of
Routing by Stor-Ind method,Time Span=0.00-120.00 hrs, dt= 0.05 hrs
Peak Elev=248.71'@ 12.26 hrs Surf.Area=20,472 sf Storage=32,231 cf
Plug-Flow detention time=689.9 min calculated for 1.406 of(100% of inflow)
Center-of-Mass det. time=691.0 min ( 1,473.0-782.0)
Volume Invert Avail Storage Storage Description
#1 247.00' 111,043 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
247.00 17,000 0 0
248.00 19,007 18,004 18,004
249.00 21,070 20,039 38,042
250.00 23,206 22,138 60,180
251.00 25,413 24,310 84,490
252.00 27,693 26,553 111,043
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' 0.110 cfs 3"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=3.74 cfs @ 12.26 hrs HW=248.71' (Free Discharge)
=12"CMP Barrel (Barrel Controls 3.74 cfs @ 4.76 fps)
2=18"CMP Riser (Passes< 7.17 cfs potential flow)
3=3"Skimmer (Passes <0.11 cfs potential flow)
4=10'Secondary Spillway ( Controls 0.00 cfs)

Basin #4 Type 1124-hr 10 yr Rainfall=5.17"
Prepared by{enter your company name here} Printed 8/1/2023
HydroCAD®10.00-26 s/n 07329 O 2020 HydroCAD Software Solutions LLC Page 4
Summary for Subcatchment IS: Watershed#4
Runoff = 38.85 cfs @ 11.98 hrs, Volume= 2.182 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
5.850 94 Newly graded area, HSG D
5.850 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) ft/sec) (cfs)
3.4 100 0.0280 0.49 Sheet Flow, Sheet
Fallow n=0.050 P2=3.55"
4.3 407 0.0250 1.58 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare& Untilled Kv= 10.0 fps
7.7 507 Total

r •
Basin #4 Type//24-hr 10 yr Rainfall=5.17"
Prepared by{enter your company name here} Printed 8/1/2023
HydroCADO 10 00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 5
Summary for Pond 1 P: Basin #4
Inflow Area= 5.850 ac, 0.00% Impervious, Inflow Depth = 4.48" for 10 yr event
Inflow = 38.85 cfs @ 11.98 hrs, Volume= 2.182 of
Outflow = 13.41 cfs @ 12.13 hrs, Volume= 2.182 af, Atten=65%, Lag=8.6 min
Primary - 13.41 cfs @ 12.13 hrs, Volume= 2.182 of
Routing by Stor-Ind method, Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=249.40' @ 12.13 hrs Surf.Area=21,934 sf Storage=46,994 cf
Plug-Flow detention time=482.4 min calculated for 2.181 of(100%of inflow)
Center-of-Mass det. time=483.5 min( 1,254.1 -770.6 )
Volume Invert Avail Storage Storage Description
#1 247.00' 111,043 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
247.00 17,000 0 0
248.00 19,007 18,004 18,004
249.00 21,070 20,039 38,042
250.00 23,206 22,138 60,180
251.00 25,413 24,310 84,490
252.00 27,693 26,553 111,043
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'/' 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' 0.110 cfs 3"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
fi=3"
riry OutFlow Max=13.25 cfs @ 12.13 hrs HW=249.40' (Free Discharge)
2"CMP Barrel (Barrel Controls 4.19 cfs @ 5.33 fps)
2=18"CMP Riser (Passes< 10.07 cfs potential flow)
Skimmer (Passes<0.11 cfs potential flow)
4=10' Secondary Spillway (Weir Controls 9.06 cfs @ 1.83 fps)

Basin #4 Type 1124-hr 25 yr Rainfall=6.15"
Prepared by(enter your company name here) Printed 8/1/2023
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 6
Summary for Subcatchment 1 S: Watershed #4
Runoff = 46.70 cfs @ 11.98 hrs, Volume= 2.655 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
_ 5.850 94 Newly graded area, HSG D
5.850 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
3.4 100 0.0280 0.49 Sheet Flow, Sheet
Fallow n=0.050 P2=3.55"
4.3 407 0.0250 1.58 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare& Untilled Kv= 10.0 fps
7.7 507 Total

i
Basin#4 Type 1l 24-hr 25 yr Rainfall=6.15"
Prepared by(enter your company name here) Printed 8/1/2023
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 7
Summary for Pond 1 P: Basin #4
Inflow Area = 5.850 ac, 0.00% Impervious, Inflow Depth= 5.45" for 25 yr event
Inflow = 46.70 cfs @ 11.98 hrs, Volume= 2.655 of
Outflow - 24.11 cfs @ 12.10 hrs, Volume= 2.655 af, Atten=48%, Lag=6.7 min
Primary = 24.11 cfs @ 12.10 hrs, Volume= 2.655 of
Routing by Stor-Ind method,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=249.65'@ 12.10 hrs Surf.Area=22,457 sf Storage= 52,413 cf
Plug-Flow detention time=411.7 min calculated for 2.655 of(100%of inflow)
Center-of-Mass det.time=411.2 min( 1,177.0-765.8 )
Volume Invert Avail.Storage Storage Description
#1 247.00' 111,043 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq ft) (cubic-feet) (cubic-feet)
247.00 17,000 0 0
248.00 19,007 18,004 18,004
249.00 21,070 20,039 38,042
250.00 23,206 22,138 60,180
251.00 25,413 24,310 84,490
252.00 27,693 26,553 111,043
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' 0.110 cfs 3"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=23.93 cfs.@ 12.10 hrs HW=249.65' (Free Discharge)
=12"CMP Barrel (Barrel Controls 4.34 cfs @ 5.52 fps)
2_18"CMP Riser (Passes < 10.92 cfs potential flow)
3=3"Skimmer (Passes <0.11 cfs potential flow)
4=10'Secondary Spillway (Weir Controls 19.59 cfs @ 2.19 fps)

1S v 1P
Watershed #5 Basin #5
SuLrat Reach On Link Routing Diagram for Basin#5
Prepared by{enter your company name here}, Printed 8/1/2023
HydroCAD®10.00-26 sin 07329 0 2020 HydroCAD Software Solutions LLC

A
Basin#5 Type//24-hr 2 yr Rainfaii=3.55"
Prepared by(enter your company name here} Printed 8/1/2023
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 2
Summary for Subcatchment 1S: Watershed#5
Runoff — 41.26 cfs @ 11.99 hrs, Volume= 2.259 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
9.400 94 Newly graded area, HSG D
9.400 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
3.2 100 0.0330 0.53 Sheet Flow,Sheet
Fallow n=0.050 P2=3.55"
4.6 570 0.0430 2.07 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare& Untilled Kv= 10.0 fps
7.8 670 Total

Basin#5 Type 11 24-hr 2 yr Rainfall=3.55"
Prepared by{enter your company name here} Printed 8/1/2023
HydroCAD®10 00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 3
Summary for Pond 1 P: Basin #5
Inflow Area= 9.400 ac, 0.00% Impervious, Inflow Depth = 2.88" for 2 yr event
Inflow = 41.26 cfs @ 11.99 hrs, Volume= 2.259 of
Outflow = 3.83 cfs @ 12.48 hrs, Volume= 2.259 af, Atten=91%, Lag=29.6 min
Primary - 3.83 cfs @ 12.48 hrs, Volume= 2.259 of
Routing by Stor-Ind method,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=238.85'@ 12.48 hrs Surf.Area=32,971 sf Storage= 55,994 cf
Plug-Flow detention time=991.8 min calculated for 2.258 of(100%of inflow)
Center-of-Mass det. time=993.5 min ( 1,775.6-782.1 )
Volume Invert Avail Storage Storage Description
#1 237.00' 133,937 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
237.00 27,500 0 0
238.00 30,435 28,968 28,968
239.00 33,431 31,933 60,901
240.00 36,500 34,966 95,866
241.00 39,641 38,071 133,937
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' 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=3.83 cfs @ 12.48 hrs HW=238.85' (Free Discharge)
=2 "CMP Barrel (Barrel Controls 3.83 cfs @ 4.88 fps)
=18"CMP Riser (Passes <7.83 cfs potential flow)
3=3"Skimmer (Passes<0.11 cfs potential flow)
4=20'Secondary Spillway ( Controls 0.00 cfs)

i r
Basin #5 Type 11 24-hr 10 yr Rainfall=5.17"
Prepared by{enter your company name here} Printed 8/1/2023
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 4
Summary for Subcatchment 1S: Watershed#5
Runoff = 62.25 cfs @ 11.99 hrs, Volume= 3.506 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
9.400 94 Newly graded area, HSG D
9.400 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
3.2 100 0.0330 0.53 Sheet Flow,Sheet
Fallow n=0.050 P2= 3.55"
4.6 570 0.0430 2.07 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare& Untilled Kv= 10.0 fps
7.8 670 Total

1 f
Basin#5 Type 11 24-hr 10 yr Rainfall=5.17"
Prepared by{enter your company name here) Printed 8/1/2023
HydroCADO 10.00-26 s/n 07329 O 2020 HydroCAD Software Solutions LLC Page 5
Summary for Pond 1 P: Basin #5
Inflow Area= 9.400 ac, 0.00% Impervious, Inflow Depth= 4.48" for 10 yr event
Inflow = 62.25 cfs @ 11.99 hrs, Volume= 3.506 of
Outflow - 25.65 cfs @ 12.12 hrs, Volume= 3.506 af, Atten=59%, Lag=7.9 min
Primary = 25.65 cfs @ 12.12 hrs, Volume= 3.506 of
Routing by Stor-Ind method,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=239.46'@ 12.12 hrs Surf.Area=34,839 sf Storage=76,945 cf
Plug-Flow detention time=681.6 min calculated for 3.505 of(100%of inflow)
Center-of-Mass det. time=683.4 min( 1,454.1 -770.7 )
Volume Invert Avali.Storage Storage Description
#1 237.00' 133,937 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
237.00 27,500 0 0
238.00 30,435 28,968 28,968
239.00 33,431 31,933 60,901
240.00 36,500 34,966 95,866
241.00 39,641 38,071 133,937
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=0.02007' 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' 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=24.92 cfs @ 12.12 hrs HW=239.45' (Free Discharge)
=12"CMP Barrel (Barrel Controls 4.22 cfs @ 5.37 fps)
2=18"CMP Riser (Passes< 10.24 cfs potential flow)
3=3"Skimmer (Passes<0.11 cfs potential flow)
4=20'Secondary Spillway (Weir Controls 20.71 cfs @ 2.03 fps)

Basin#5 Type 1124-hr 25 yr Rainfall=6.15"
Prepared by{enter your company name here} Printed 8/1/2023
HydroCAD®10 00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 6
Summary for Subcatchment 1S: Watershed #5
Runoff = 74.84 cfs @ 11.99 hrs, Volume= 4.265 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
9.400 94 Newly graded area, HSG D
9.400 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs
3.2 100 0.0330 0.53 Sheet Flow, Sheet
Fallow n=0.050 P2=3.55"
4.6 570 0.0430 2.07 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare&Untilled Kv= 10.0 fps
7.8 670 Total

� t .
Basin #5 Type 1l 24-hr 25 yr Rainfall=6.15"
Prepared by(enter your company name here) Printed 8/1/2023
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 7
Summary for Pond 1 P: Basin #5
Inflow Area= 9.400 ac, 0.00% Impervious, Inflow Depth= 5.45" for 25 yr event
Inflow - 74.84 cfs @ 11.99 hrs, Volume= 4.265 of
Outflow = 43.53 cfs @ 12.08 hrs, Volume= 4.265 af, Atten=42%, Lag=5.9 min
Primary = 43.53 cfs @ 12.08 hrs, Volume= 4.265 of
Routing by Stor-Ind method,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=239.67'@ 12.08 hrs Surf.Area=35,502 sf Storage=84,494 cf
Plug-Flow detention time=575.8 min calculated for 4.264 of(100%of inflow)
Center-of-Mass det. time=577.6 min ( 1,343.5-765.9)
Volume Invert Avail Storage Storage Description
#1 237.00' 133,937 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic feet)
237.00 27,500 0 0
238.00 30,435 28,968 28,968
239.00 33,431 31,933 60,901
240.00 36,500 34,966 95,866
241.00 39,641 38,071 133,937
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' 0.110 cfs 3"Skimmer
#4 Primary 239.00' 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=42.70 cfs @ 12.08 hrs HW=239.67' (Free Discharge)
=2 "CMP Barrel (Barrel Controls 4.35 cfs @ 5.53 fps)
_18"CMP Riser (Passes< 10.98 cfs potential flow)
3=3"Skimmer (Passes < 0.11 cfs potential flow)
4=20'Secondary Spillway (Weir Controls 38.35 cfs @ 2.40 fps)

1 S N
Watershed #6 Basin #6
Subcat Reach on Link Routing Diagram for Basin#6
Prepared by{enter your company name here}, Printed 6/1/2023
HydroCAD®10.00-26 sin 07329 0 2020 HydroCAD Software Solutions LLC

Basin #6 Type 1124-hr 2 yr Rainfall=3.55"
Prepared by{enter your company name here} Printed 8/1/2023
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 2
Summary for Subcatchment IS: Watershed#6
Runoff — 20.70 cfs @ 12.03 hrs, Volume= 1.281 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
5.330 94 Newly graded area, HSG D
5.330 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
3.7 100 0.0220 0.45 Sheet Flow, Sheet
Fallow n=0.050 P2=3.55"
7.9 826 0.0300 1.73 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare& Untilled Kv= 10.0 fps
11.6 926 Total

f
Basin #6 Type 1124-hr 2 yr Rainfall=3.55"
Prepared by{enter your company name here) Printed 8/1/2023
HydroCAD®10.00-26 s/n 07329 O 2020 HydroCAD Software Solutions LLC Page 3
Summary for Pond 1 P: Basin #6
Inflow Area= 5.330 ac, 0.00% Impervious, Inflow Depth= 2.88" for 2 yr event
Inflow = 20.70 cfs @ 12.03 hrs, Volume= 1.281 of
Outflow - 3.83 cfs @ 12.33 hrs, Volume= 1.281 af, Atten=81%, Lag= 18.3 min
Primary = 3.83 cfs @ 12.33 hrs, Volume= 1.281 of
Routing by Stor-Ind method,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=233.85'@ 12.33 hrs Surf.Area= 17,309 sf Storage=28,701 cf
Plug-Flow detention time=713.4 min calculated for 1.281 of(100%of inflow)
Center-of-Mass det. time=714.7 min ( 1,500.4-785.6 )
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 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' 0.072 cfs 2.5"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=3.83 cfs @ 12.33 hrs HW=233.85' (Free Discharge)
=12"CMP Barrel (Barrel Controls 3.83 cfs @ 4.88 fps)
2=18"CMP Riser (Passes<7.82 cfs potential flow)
3=2.5"Skimmer (Passes<0.07 cfs potential flow)
4=10'Secondary Spillway (Controls 0.00 cfs)

Basin #6 Type 11 24-hr 10 yr Rainfall=5.17"
Prepared by(enter your company name here} Printed 8/1/2023
HydroCAD®10 00-26 s/n 07329 O 2020 HydroCAD Software Solutions LLC Page 4
Summary for Subcatchment IS: Watershed#6
Runoff — 31.28 cfs @ 12.03 hrs, Volume= 1.988 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
5.330 94 Newly graded area, HSG D
5.330 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
3.7 100 0.0220 0.45 Sheet Flow, Sheet
Fallow n=0.050 P2=3.55"
7.9 826 0.0300 1.73 Shallow Concentrated Flow,Shallow Concent.
Nearly Bare& Untilled Kv= 10.0 fps
11.6 926 Total

• t
Basin #6 Type 1124-hr 10 yr Rainfall=5.17"
Prepared by{enter your company name here} Printed 8/1/2023
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 5
Summary for Pond 1 P: Basin #6
Inflow Area= 5.330 ac, 0.00% Impervious, Inflow Depth= 4.48" for 10 yr event
Inflow = 31.28 cfs @ 12.03 hrs, Volume= 1.988 of
Outflow = 15.04 cfs @ 12.17 hrs, Volume= 1.988 af, Atten= 52%, Lag=8.7 min
Primary = 15.04 cfs @ 12.17 hrs, Volume= 1.988 of
Routing by Stor-Ind method,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=234.45' @ 12.17 hrs Surf.Area= 18,557 sf Storage=39,614 cf
Plug-Flow detention time=490.3 min calculated for 1.987 of(100%of inflow)
Center-of-Mass det. time=491.8 min( 1,266.0-774.2)
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 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' 0.072 cfs 2.5"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=14.70 cfs @ 12.17 hrs HW=234.44' (Free Discharge)
T=12"CMP Barrel (Barrel Controls 4.21 cfs @ 5.36 fps)
2=18"CMP Riser (Passes< 10.20 cfs potential flow)
3=2.5"Skimmer (Passes < 0.07 cfs potential flow)
=10'Secondary Spillway (Weir Controls 10.49 cfs @ 1.89 fps)

i
Basin #6 Type 1124-hr 25 yr Rainfall=6.95"
Prepared by{enter your company name here} Printed 8/1/2023
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 6
Summary for Subcatchment 1S: Watershed#6
Runoff = 37.62 cfs @ 12.03 hrs, Volume= 2.419 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
5.330 94 Newly graded area, HSG D
5.330 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
3.7 100 0.0220 0.45 Sheet Flow,Sheet
Fallow n=0.050 P2=3.55"
7.9 826 0.0300 1.73 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare& Untilled Kv= 10.0 fps
11.6 926 Total

Basin#6 Type II 24-hr 25 yr Rainfall=6.15"
Prepared by(enter your company name here) Printed 8/1/2023
HydroCAD@ 10.00-26 s/n 07329 O 2020 HydroCAD Software Solutions LLC Page 7
Summary for Pond 1 P: Basin #6
Inflow Area= 5.330 ac, 0.00% Impervious, Inflow Depth= 5.45" for 25 yr event
Inflow = 37.62 cfs @ 12.03 hrs, Volume= 2.419 of
Outflow = 23.38 cfs @ 12.14 hrs, Volume= 2.419 af, Atten=38%, Lag=6.8 min
Primary -- 23.38 cfs @ 12.14 hrs, Volume= 2.419 of
Routing by Stor-Ind method,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=234.63'@ 12.14 hrs Surf.Area= 18,948 sf Storage=43,107 cf
Plug-Flow detention time=415.2 min calculated for 2.418 of(100% of inflow)
Center-of-Mass det. time=416.6 min( 1,186.1 -769.4)
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 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' 0.072 cfs 2.5"Skimmer
#4 Primary 234.00' 10'Secondary Spillway, C=3.27
Offset(feet) 0.00 4.50 14.60 19.00
Height(feet) 1.50 0.00 0.00 1.50
Primary OutFlow Max=23.11 cfs @ 12.14 hrs HW=234.63' (Free Discharge)
t=1=12"CMP Barrel (Barrel Controls 4.33 cfs @ 5.51 fps)
2=18"CMP Riser (Passes< 10.86 cfs potential flow)
3=2.5"Skimmer (Passes< 0.07 cfs potential flow)
4=10'Secondary Spillway (Weir Controls 18.78 cfs @ 2.17 fps)

Watershed #7 Basin #7
:iul:�eat Reach Pon Link Routing Diagram for Basin#7
Prepared by(enter your company name here), Primed 811/2023
HydroCAD®10.00-26 sln 07329 0 2020 HydroCAD Software Solutions LLC

O f
Basin#7 Type 1124-hr 2 yr Rainfall=3.55"
Prepared by{enter your company name here} Printed 8/1/2023
HydroCAD®10.00-26 s/n 07329 4 2020 HydroCAD Software Solutions LLC Page 2
Summary for Subcatchment IS: Watershed#7
Runoff = 12.55 cfs @ 12.00 hrs, Volume= 0.707 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
2.940 94 Newly graded area, HSG D
2.940 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
2.6 100 0.0530 0.64 Sheet Flow, Sheet
Fallow n=0.050 P2= 3.55"
6.1 689 0.0360 1.90 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare& Untilled Kv=10.0 fps
8.7 789 Total

Basin #7 Type 1124-hr 2 yr Rainfall=3.55"
Prepared by{enter your company name here} Printed 8/1/2023
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 3
Summary for Pond 1 P: Basin #7
Inflow Area= 2.940 ac, 0.00% Impervious, Inflow Depth = 2.88" for 2 yr event
Inflow = 12.55 cfs @ 12.00 hrs, Volume= 0.707 of
Outflow = 3.62 cfs @ 12.17 hrs, Volume= 0.707 af, Atten=71%, Lag= 10.5 min
Primary = 3.62 cfs @ 12.17 hrs, Volume= 0.707 of
Routing by Stor Ind method,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=238.55'@ 12.17 hrs Surf.Area= 10,968 sf Storage= 15,090 cf
Plug-Flow detention time=872.0 min calculated for 0.706 of(100%of inflow)
Center-of-Mass det. time=873.6 min ( 1,656.5-782.9)
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=3.62 cfs @ 12.17 hrs HW=238.54' (Free Discharge)
=12"CMP Barrel (Barrel Controls 3.62 cfs @ 4.61 fps)
2=18"CMP Riser (Passes< 6.15 cfs potential flow)
3=2"Skimmer (Passes< 0.04 cfs potential flow)
4=10'Secondary Spillway ( Controls 0.00 cfs)

� T
Basin#7 Type 1124-hr 90 yr Rainfall=5.97"
Prepared by{enter your company name here} Printed 8/1/2023
HydroCAD®10.00-26 s1n 07329 ©2020 HydroCAD Software Solutions LLC Page 4
Summary for Subcatchment 1S: Watershed#7
Runoff = 18.95 cfs @ 11.99 hrs, Volume= 1.097 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
_ 2.940 94 Newly graded area, HSG D
2.940 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
2.6 100 0.0530 0.64 Sheet Flow, Sheet
Fallow n=0.050 P2=3.55"
6.1 689 0.0360 1.90 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare& Untilled Kv= 10.0 fps
8.7 789 Total

t r
Basin #7 Type//24-hr 10 yr Rainfall=5.17"
Prepared by{enter your company name here) Printed 8/1/2023
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 5
Summary for Pond 1 P: Basin#7
Inflow Area= 2.940 ac, 0.00% Impervious, Inflow Depth = 4.48" for 10 yr event
Inflow = 18.95 cfs @ 11.99 hrs, Volume= 1.097 of
Outflow - 6.95 cfs @ 12.15 hrs, Volume= 1.097 af, Atten=63%, Lag=9.2 min
Primary - 6.95 cfs @ 12.15 hrs, Volume= 1.097 of
Routing by Stor-Ind method,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=239.19'@ 12.15 hrs Surf.Area= 12,142 sf Storage=22,472 cf
Plug-Flow detention time=592.0 min calculated for 1.096 of(100% of inflow)
Center-of-Mass det. time=593.7 min ( 1,365.2-771.5 )
Volume Invert Avail.Storage Storage Description
#1 237.00' 47,371 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area lnc.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=0.02007' 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=6.92 cfs @ 12.15 hrs HW=239.19' (Free Discharge)
=12"CMP Barrel (Barrel Controls 4.06 cfs @ 5.16 fps)
2=18"CMP Riser (Passes< 9.29 cfs potential flow)
3=2"Skimmer (Passes < 0.04 cfs potential flow)
-10'Secondary Spillway (Weir Controls 2.87 cfs @ 1.34 fps)

l
Basin #7 Type//24-hr 25 yr RainfaU=6.95"
Prepared by{enter your company name here} Printed 8/1/2023
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 6
Summary for Subcatchment IS: Watershed#7
Runoff = 22.78 cfs @ 11.99 hrs, Volume= 1.334 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
2.940 94 Newly graded area, HSG D
2.940 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
2.6 100 0.0530 0.64 Sheet Flow, Sheet
Fallow n=0.050 P2= 3.55"
6.1 689 0.0360 1.90 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare& Untilled Kv= 10.0 fps
8.7 789 Total

t
Basin #7 Type 1124-hr 25 yr Rainfall=6.15"
Prepared by{enter your company name here} Printed 8/1/2023
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 7
Summary for Pond 1 P: Basin #7
Inflow Area = 2.940 ac, 0.00% Impervious, Inflow Depth= 5.45" for 25 yr event
Inflow = 22.78 cfs @ 11.99 hrs, Volume= 1.334 of
Outflow = 12.40 cfs @ 12.11 hrs, Volume= 1.334 af, Atten=46%, Lag=6.8 min
Primary = 12.40 cfs @ 12.11 hrs, Volume= 1.334 of
Routing by Stor-Ind method,Time Span=0.00-120.00 hrs, dt= 0.05 hrs
Peak Elev=239.38'@ 12.11 hrs Surf.Area= 12,486 sf Storage=24,812 cf
Plug-Flow detention time=498.1 min calculated for 1.334 of(100%of inflow)
Center-of-Mass det.time=499.8 min ( 1,266.5-766.7)
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=12.18 cfs @ 12.11 hrs HW=239.37' (Free Discharge)
=12"CMP Barrel (Barrel Controls 4.17 cfs @ 5.31 fps)
2=18"CMP Riser (Passes< 9.96 cfs potential flow)
3=2"Skimmer (Passes <0.04 cfs potential flow)
4=10'Secondary Spillway (Weir Controls 8.01 cfs @ 1.77 fps)

Watershed #8 Basin #8
Subcat Reach on Link Routing Diagram for Basin#8
Prepared by{enter your company name here}, Printed 8/1/2023
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC

Basin#8 Type 11 24-hr 2 yr Rainfall=3.55"
Prepared by{enter your company name here} Printed 8/1/2023
HydroCAD®10 00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 2
Summary for Subcatchment IS: Watershed #8
Runoff = 40.89 cfs @ 11.98 hrs, Volume= 2.192 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
9120 94 Newly graded area, HSG D
9.120 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
_ (min) (feet) (ft/ft) (ft/sec) (cfs)
2.5 100 0.0590 0.67 Sheet Flow, Sheet
Fallow n=0.050 P2=3.55"
4.5 529 0.0380 1.95 Shallow Concentrated Flow,Shallow Concent.
Nearly Bare& Untilled Kv= 10.0 fps
7.0 629 Total

Basin #8 Type 1124-hr 2 yr Rainfall=3.55"
Prepared by{enter your company name here} Printed 8/1/2023
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 3
Summary for Pond 1 P: Basin #8
Inflow Area = 9.120 ac, 0.00% Impervious, Inflow Depth = 2.88" for 2 yr event
Inflow = 40.89 cfs @ 11.98 hrs, Volume= 2.192 of
Outflow = 3.80 cfs @ 12.46 hrs, Volume= 2.192 af, Atten=91%, Lag=28.6 min
Primary = 3.80 cfs @ 12.46 hrs, Volume= 2.192 of
Routing by Stor-Ind method,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=238.81' @ 12.46 hrs Surf.Area=32,729 sf Storage= 54,190 cf
Plug-Flow detention time=994.1 min calculated for 2.191 of(100%of inflow)
Center-of-Mass det.time=995.8 min ( 1,777.2-781.4)
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/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' 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=3.80 cfs @ 12.46 hrs HW=238.81' (Free Discharge)
k.
10 =12"CMP Barrel (Barrel Controls 3.80 cfs @ 4.84 fps)
2=18"CMP Riser (Passes<7.65 cfs potential flow)
3=3"Skimmer (Passes< 0.11 cfs potential flow)
4=20'Secondary Spillway ( Controls 0.00 cfs)

i
Basin #8 Type 1124 hr 10 yr Rainfall=5.17"
Prepared by(enter your company name here) Printed 8/1/2023
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 4
Summary for Subcatchment IS: Watershed#8
Runoff — 61.66 cfs @ 11.98 hrs, Volume= 3.402 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
9120 94 Newly graded area, HSG D
9.120 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
2.5 100 0.0590 0.67 Sheet Flow, Sheet
Fallow n=0.050 P2=3.55"
4.5 529 0.0380 1.95 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare& Untilled Kv= 10.0 fps
7.0 629 Total

Basin#8 Type//24-hr 10 yr Rainfall=5.17"
Prepared by{enter your company name here) Printed 8/1/2023
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 5
Summary for Pond 1P: Basin #8
Inflow Area = 9.120 ac, 0.00% Impervious, Inflow Depth = 4.48" for 10 yr event
Inflow = 61.66 cfs @ 11.98 hrs, Volume= 3.402 of
Outflow = 23.94 cfs @ 12.11 hrs, Volume= 3.402 af, Atten=61%, Lag= 7.9 min
Primary = 23.94 cfs @ 12.11 hrs, Volume= 3.402 of
Routing by Stor-Ind method,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev= 239.43'@ 12.11 hrs Surf.Area=34,784 sf Storage= 75,515 cf
Plug-Flow detention time=684.8 min calculated for 3.400 of(100%of inflow)
Center-of-Mass det. time=686.6 min ( 1,456.5-769.9)
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 T 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' 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=23.51 cfs @ 12.11 hrs HW=239.43' (Free Discharge)
=12"CMP Barrel (Barrel Controls 4.20 cfs @ 5.35 fps)
2=18"CMP Riser (Passes< 10.17 cfs potential flow)
3=3"Skimmer (Passes<0.11 cfs potential flow)
4=20`Secondary Spillway (Weir Controls 19.30 cfs @ 1.99 fps)

Basin#8 Type 1124-hr 25 yr Rainfall=6.15"
Prepared by{enter your company name here} Printed 8/1/2023
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 6
Summary for Subcatchment 1S: Watershed#8
Runoff = 74.11 cfs @ 11.98 hrs, Volume= 4.138 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
9120 94 Newly graded area, HSG D _
9.120 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
2.5 100 0.0590 0.67 Sheet Flow, Sheet
Fallow n=0.050 P2=3.55"
4.5 529 0.0380 1.95 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare&Untilled Kv=10.0 fps
7.0 629 Total

Basin #8 Type ll 24-hr 25 yr Rainfall=6.15"
Prepared by{enter your company name here) Printed 8/1/2023
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 7
Summary for Pond 1 P: Basin #8
Inflow Area= 9.120 ac, 0.00% Impervious, Inflow Depth = 5.45" for 25 yr event
Inflow = 74.11 cfs @ 11.98 hrs, Volume= 4.138 of
Outflow = 42.47 cfs @ 12.07 hrs, Volume= 4.138 af, Atten=43%, Lag=5.7 min
Primary = 42.47 cfs @ 12.07 hrs, Volume= 4.138 of
Routing by Stor-Ind method,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=239.66'@ 12.07 hrs Surf.Area=35,539 sf Storage=83,535 cf
Plug-Flow detention time=580.4 min calculated for 4.138 of(100% of inflow)
Center-of-Mass det. time=580.3 min( 1,345.5-765.2)
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 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' 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 OutFiow Max=41.00 cfs @ 12.07 hrs HN=239.65' (Free Discharge)
=12"CMP Barrel (Barrel Controls 4.34 cfs @ 5.52 fps)
2=18"CMP Riser (Passes< 10.92 cfs potential flow)
3=3"Skimmer (Passes < 0.11 cfs potential flow)
4=20'Secondary Spillway (Weir Controls 36.67 cfs @ 2.37 fps)

1S v 1P
Watershed #9 Basin #9
SUbcat Reach on [LnI Routing Diagram for Basin 99
Prepared by{enter your company name here}, Printed 8/1/2023
HydroCADO 10.00-26 sln 07329 ©2020 HydroCAD Software Solutions LLC

r :
Basin #9 Type //24-hr 2 yr Rainfall=3.55"
Prepared by{enter your company name here} Printed 8/1/2023
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 2
Summary for Subcatchment 1S: Watershed#9
Runoff = 25.95 cfs @ 11.99 hrs, Volume= 1.447 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
_ 6.020 94 Newly-graded area, HSG D
6.020 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
2.9 100 0.0410 0.57 Sheet Flow,Sheet
Fallow n=0.050 P2=3.55"
5.5 586 0.0320 1.79 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare& Untilled Kv= 10.0 fps
8.4 686 Total

i
Basin #9 Type 1124-hr 2 yr Rainfall=3.55"
Prepared by{enter your company name here} Printed 8/1/2023
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 3
Summary for Pond 1 P: Basin #9
Inflow Area = 6.020 ac, 0.00% Impervious, Inflow Depth= 2.88" for 2 yr event
Inflow = 25.95 cfs @ 11.99 hrs, Volume= 1.447 of
Outflow = 3.75 cfs @ 12.29 hrs, Volume= 1.447 af, Atten= 86%, Lag= 17.9 min
Primary = 3.75 cfs @ 12.29 hrs, Volume= 1.447 of
Routing by Stor-Ind method,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=240.72' @ 12.29 hrs Surf.Area=20,944 sf Storage=33,186 cf
Plug-Flow detention time=693.1 min calculated for 1.446 of(100%of inflow)
Center-of-Mass det.time=694.2 min( 1,476.8-782.7)
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 1 Outlet Invert=238.00'/237.00' S=0.0200 7' 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' 0.110 cfs 3"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 @ 12.29 hrs HW=240.72' (Free Discharge)
-=12"CMP Barrel (Barrel Controls 3.75 cfs @ 4.77 fps)
2=18"CMP Riser (Passes< 7.24 cfs potential flow)
3=3"Skimmer (Passes <0.11 cfs potential flow)
4=10'Secondary Spillway ( Controls 0.00 cfs)

f
Basin #9 Type 1l 24-hr 10 yr Rainfall=5.17"
Prepared by{enter your company name here} Printed 8/1/2023
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 4
Summary for Subcatchment IS: Watershed#9
Runoff = 39.16 cfs @ 11.99 hrs, Volume= 2.245 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
6.020 94 Newly graded area, HSG D
6.020 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
2.9 100 0.0410 0.57 Sheet Flow, Sheet
Fallow n=0.050 P2=3.55"
5.6 586 0.0320 1.79 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare& Untilled Kv= 10.0 fps
8.4 686 Total

i
Basin #9 Type//24-hr 10 yr Rainfall=5.17"
Prepared by(enter your company name here) Printed 8/1/2023
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 5
Summary for Pond 1P: Basin #9
Inflow Area= 6.020 ac, 0.00% Impervious, Inflow Depth= 4.48" for 10 yr event
Inflow = 39.16 cfs @ 11.99 hrs, Volume= 2.245 of
Outflow = 13.87 cfs @ 12.15 hrs, Volume= 2.245 af, Atten=65%, Lag=9.2 min
Primary - 13.87 cfs @ 12.15 hrs, Volume= 2.245 of
Routing by Stor-Ind method, Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=241.42'@ 12.15 hrs, Surf.Area=22,319 sf Storage=48,189 cf
Plug-Flow detention time=484.1 min calculated for 2.244 of(100% of inflow)
Center-of-Mass det. time=485.3 min ( 1,256.5-771.2 )
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=0.02007' 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' 0.110 cfs 3"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=13.79 cfs @ 12.15 hrs HW=241.41' (Free Discharge)
=12"CMP Barrel (Barrel Controls 4.20 cfs @ 5.34 fps)
2=18"CMP Riser (Passes < 10.12 cfs potential flow)
3=3"Skimmer (Passes< 0.11 cfs potential flow)
4=10' Secondary Spillway (Weir Controls 9.59 cfs @ 1.85 fps)

Basin#9 Type 1124-hr 25 yr Rainfall=6.1 5"
Prepared by{enter your company name here} Printed 8/1/2023
HydroCAD®10 00-26 sln 07329 ©2020 HydroCAD Software Solutions LLC Page 6
Summary for Subcatchment 1S: Watershed#9
Runoff = 47.09 cfs @ 11.99 hrs, Volume= 2.732 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
6.020 94 Newly graded area, HSG D
6.020 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
2.9 100 0.0410 0.57 Sheet Flow,Sheet
Fallow n=0.050 P2= 3.55"
5.5 586 0.0320 1.79 Shallow Concentrated Flow, Shallow Concent.
_ Nearly Bare& Untilled Kv= 10.0 fps
8.4 686 Total

Basin#9 Type 1124 hr 25 yr Rainfall=6.15"
Prepared by(enter your company name here) Printed 8/1/2023
Hy droCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 7
Summary for Pond 1 P: Basin#9
Inflow Area= 6.020 ac, 0.00% Impervious, Inflow Depth = 5.45" for 25 yr event
Inflow = 47.09 cfs @ 11.99 hrs, Volume= 2.732 of
Outflow - 24.71 cfs @ 12.11 hrs, Volume= 2.732 af, Atten=48%, Lag=6.9 min
Primary = 24.71 cfs @ 12.11 hrs, Volume= 2.732 of
Routing by Stor-Ind method, Time Span=0.00-120.00 hrs, dt= 0.05 hrs
Peak Elev=241.66' @ 12.11 hrs Surf.Area=22,813 sf Storage= 53,690 cf
Plug-Flow detention time=411.7 min calculated for 2.731 of(100%of inflow)
Center-of-Mass det. time=412.9 min ( 1,179.3-766.5 )
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/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' 0.110 cfs 3"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=24.42 cfs @ 12.11 hrs HW=241.66' (Free Discharge)
t
2"CMP Barrel (Barrel Controls 4.34 cfs @ 5.53 fps)
2=18"CMP Riser (Passes< 10.95 cfs potential flow)
3=3"Skimmer (Passes <0.11 cfs potential flow)
4=10'Secondary Spillway (Weir Controls 20.08 cfs @ 2.20 fps)

1S '` 1P
Watershed #10 Basin #10
Subcat Reach on Link Routing Diagram for Basin#10
Prepared by(enter your company name here), Printed 8/1/2023
HydmCAD®10.0D-26 s/n 07329 0 2020 HydroCAO Software Solutions LLC

a
Basin#10 Type 1124-hr 2 yr Rainfall=3.55"
Prepared by{enter your company name here} Printed 8/1/2023
HydroCAD®10.00-26 s/n 07329 @ 2020 HydroCAD Software Solutions LLC Page 2
Summary for Subcatchment 1S: Watershed#10
Runoff — 13.48 cfs @ 12.00 hrs, Volume= 0.767 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
3.190 94 Newly graded area, HSG D
3.190 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
2.8 100 0.0450 0.60 Sheet Flow, Sheet
Fallow n=0.050 P2=3.55"
6.2 591 0.0250 1.58 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare & Untilled Kv= 10.0 fps
9.0 691 Total

Basin #10 Type 1124-hr 2 yr Rainfall=3.55"
Prepared by{enter your company name here} Printed 8/1/2023
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 3
Summary for Pond 1 P: Basin #10
Inflow Area = 3.190 ac, 0.00% Impervious, Inflow Depth = 2.88" for 2 yr event
Inflow - 13.48 cfs @ 12.00 hrs, Volume= 0.767 of
Outflow - 3.66 cfs @ 12.19 hrs, Volume= 0.767 af, Atten=73%, Lag= 11.2 min
Primary = 3.66 cfs @ 12.19 hrs, Volume= 0.767 of
Routing by Stor-Ind method,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=240.60'@ 12.19 hrs, Surf.Area= 11,310 sf Storage= 16,451 cf
Plug-Flow detention time=892.4 min calculated for 0.766 of(100% of inflow)
Center-of-Mass det. time=894.0 min ( 1,677.3-783.2 )
Volume Invert Avail Storage Storage Description
#1 239.00' 47,397 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic feet)
239.00 8,900 0 0
240.00 10,503 9,702 9,702
241.00 11,838 11,171 20,872
242.00 13,244 12,541 33,413
243.00 14,723 13,984 47,397
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=3.66 cfs @ 12.19 hrs HW=240.60' (Free Discharge)
1=12"CMP Barrel (Barrel Controls 3.66 cfs @ 4.66 fps)
2=18"CMP Riser (Passes < 6.60 cfs potential flow)
3=2"Skimmer (Passes < 0.04 cfs potential flow)
4=10'Secondary Spillway ( Controls 0.00 cfs)

1 `
Basin#10 Type//24-hr 10 yr Rainfall=5.17"
Prepared by{enter your company name here} Printed 8/1/2023
HydroCAD®10.00-26 s/n 07329 O 2020 HydroCAD Software Solutions LLC Page 4
Summary for Subcatchment 1S: Watershed#10
Runoff — 20.36 cfs @ 12.00 hrs, Volume= 1.190 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
3190 94 Newly graded area, HSG D
3.190 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
2.8 100 0.0450 0.60 Sheet Flow,Sheet
Fallow n=0.050 P2= 3.55"
6.2 591 0.0250 1.58 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare&Untilled Kv= 10.0 fps
9.0 691 Total

i
Basin#10 Type 11 24-hr 10 yr Rainfall=5.17"
Prepared by(enter your company name here) Printed 8/1/2023
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 5
Summary for Pond 1 P: Basin #10
Inflow Area = 3.190 ac, 0.00% Impervious, Inflow Depth= 4.48" for 10 yr event
Inflow = 20.36 cfs @ 12.00 hrs, Volume= 1.190 of
Outflow = 8.47 cfs @ 12.14 hrs, Volume= 1.190 af, Atten=58%, Lag=8.6 min
Primary = 8.47 cfs @ 12.14 hrs, Volume= 1.190 of
Routing by Stor-Ind method,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=241.25' @ 12.14 hrs Surf.Area= 12,191 sf Storage=24,023 cf
Plug-Flow detention time=604.4 min calculated for 1.189 of(100%of inflow)
Center-of-Mass det. time=606.1 min ( 1,377.9-771.8)
Volume Invert Avail.Storage Storage Description
#1 239.00' 47,397 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic feet) (cubic-feet)
239.00 8,900 0 0
240.00 10,503 9,702 9,702
241.00 11,838 11,171 20,872
242.00 13,244 12,541 33,413
243.00 14,723 13,984 47,397
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=8.37 cfs @ 12.14 hrs HW=241.25' (Free Discharge)
=12"CMP Barrel (Barrel Controls 4.09 cfs @ 5.21 fps)
2=18"CMP Riser (Passes< 9.50 cfs potential flow)
3=2"Skimmer (Passes< 0.04 cfs potential flow)
=10' Secondary Spillway (Weir Controls 4.27 cfs @ 1.50 fps)

! i
Basin#10 Type 1124-hr 25 yr Rainfall=6.95"
Prepared by{enter your company name here} Printed 8/1/2023
HydroCAD®10 00-26 s/n 07329 O 2020 HydroCAD Software Solutions LLC Page 6
Summary for Subcatchment 1S: Watershed#10
Runoff = 24.48 cfs @ 12.00 hrs, Volume= 1.448 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
_ 3190 94 Newly graded area, HSG D
3.190 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs
2.8 100 0.0450 0.60 Sheet Flow, Sheet
Fallow n=0.050 P2=3.55"
6.2 591 0.0250 1.58 Shallow Concentrated Flow,Shallow Concent.
Nearly Bare& Untilled Kv= 10.0 fps
9.0 691 Total

i •
Basin #10 Type 11 24-hr 25 yr Rainfall=6.15"
Prepared by(enter your company name here) Printed 8/1/2023
HydroCADO 10 00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 7
Summary for Pond 1 P: Basin #10
Inflow Area= 3.190 ac, 0.00% Impervious, Inflow Depth = 5.45" for 25 yr event
Inflow = 24.48 cfs @ 12.00 hrs, Volume= 1.448 of
Outflow = 14.49 cfs @ 12.10 hrs, Volume= 1.448 af, Atten=41%, Lag=6.4 min
Primary = 14.49 cfs @ 12.10 hrs, Volume= 1.448 of
Routing by Stor-Ind method, Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=241.43' @ 12.10 hrs SurF.Area= 12,447 sf Storage=26,301 cf
Plug-Flow detention time=608.0 min calculated for 1.447 of(100% of inflow)
Center-of-Mass det.time=509.8 min( 1,276.8-767.0)
Volume Invert Avail Storage Storage Description
#1 239.00' 47,397 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
239.00 8,900 0 0
240.00 10,503 9,702 9,702
241.00 11,838 11,171 20,872
242.00 13,244 12,541 33,413
243.00 14,723 13,984 47,397
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
rimary OutFlow Max=14.34 cfs @ 12.10 hrs, HW=241.43' (Free Discharge)
F
2"CMP Barrel (Barrel Controls 4.20 cfs @ 5.35 fps)
2=18"CMP Riser (Passes< 10.17 cfs potential flow)
3=2"Skimmer (Passes<0.04 cfs potential flow)
4=10'Secondary Spillway (Weir Controls 10.13 cfs @ 1.88 fps)

Watershed #11 Basin #11
SUbcat Reach on Link Routing Diagram for Basin#11
Prepared by(enter your company name here), Printed 8/1/2023
HydroCADOO 10.00-26 s/n 07329 0 2020 HydroCAD Software Solutions LLC

T �
Basin#11 Type 11 24-hr 2 yr Rainfall=3.55"
Prepared by(enter your company name here} Printed 8/1/2023
HydroCAD®10 00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 2
Summary for Subcatchment 1S: Watershed#11
Runoff - 34.03 cfs @ 11.99 hrs, Volume= 1.892 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
7.870 94 Newly graded area, HSG D
7.870 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (fYsec) (cfs)
2.9 100 0.0400 0.57 Sheet Flow,Sheet
Fallow n=0.050 P2=3.55"
5.4 540 0.0280 1.67 Shallow Concentrated Flow,Shallow Concent.
Nearly Bare& Untilled Kv=10.0 fps
8.3 640 Total

1 �
Basin #11 Type 11 24-hr 2 yr Rainfall=3.55"
Prepared by(enter your company name here) Printed 8/1/2023
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 3
Summary for Pond 1 P: Basin #11
Inflow Area = 7.870 ac, 0.00% Impervious, Inflow Depth = 2.88" for 2 yr event
Inflow - 34.03 cfs @ 11.99 hrs, Volume= 1.892 of
Outflow = 3.80 cfs @ 12.40 hrs, Volume= 1.892 af, Atten=89%, Lag=24.4 min
Primary = 3.80 cfs @ 12.40 hrs, Volume= 1.892 of
Routing by Stor-Ind method,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=243.80' @ 12.40 hrs Surf.Area=27,753 sf Storage=45,456 cf
Plug-Flow detention time=850.3 min calculated for 1.891 of(100%of inflow)
Center-of-Mass det. time=851.7 min ( 1,634.3-782.6 )
Volume Invert Avail.Storage Storage Description
#1 242.00' 113,299 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
242.00 22,500 0 0
243.00 25,558 24,029 24,029
244.00 28,317 26,938 50,967
245.00 31,148 29,733 80,699
246.00 34,052 32,600 113,299
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
rimary Outflow Max=3.80 cfs @ 12.40 hrs HW=243.80' (Free Discharge)
F=1=12"CMP Barrel (Barrel Controls 3.80 cfs @ 4.83 fps)
2=18"CMP Riser (Passes <7.59 cfs potential flow)
3=3"Skimmer (Passes <0.11 cfs potential flow)
=20'Secondary Spillway ( Controls 0.00 cfs)

Basin #11 Type 1124-hr 10 yr Rainfall=5.17"
Prepared by(enter your company name here} Printed 8/1/2023
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 4
Summary for Subcatchment 1S: Watershed#11
Runoff' = 51.36 cfs @ 11.99 hrs, Volume= 2.935 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
7.870 94 Newly graded area, HSG D _
7.870 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
2.9 100 0.0400 0.57 Sheet Flow,Sheet
Fallow n=0.050 P2=3.55"
5.4 540 0.0280 1.67 Shallow Concentrated Flow,Shallow Concent.
_ Nearly Bare& Untilled Kv= 10.0 fps
8.3 640 Total

Basin#11 Type 1124-hr 10 yr Rainfall=5.17"
Prepared by{enter your company name here} Printed 8/1/2023
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 5
Summary for Pond 1 P: Basin#11
Inflow Area = 7.870 ac, 0.00% Impervious, Inflow Depth = 4.48" for 10 yr event
Inflow = 51.36 cfs @ 11.99 hrs, Volume= 2.935 of
Outflow = 22.16 cfs @ 12.12 hrs, Volume= 2.935 af, Atten=57%, Lag=7.8 min
Primary - 22.16 cfs @ 12.12 hrs, Volume= 2.935 of
Routing by Stor-Ind method,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=244.41'@ 12.12 hrs Surf.Area=29,478 sf Storage=63,157 cf
Plug-Flow detention time=588.2 min calculated for 2.934 of(100%of inflow)
Center-of-Mass det. time= 589.7 min( 1,360.8-771.1 )
Volume Invert Avail Storage Storage Description
#1 242.00' 113,299 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
242.00 22,500 0 0
243.00 25,558 24,029 24,029
244.00 28,317 26,938 50,967
245.00 31,148 29,733 80,699
246.00 34,052 32,600 113,299
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 T 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
rimary Outflow Max=21.42 cfs @ 12.12 hrs HW=244.40' (Free Discharge)
F=1=12"CMP Barrel (Barrel Controls 4.19 cfs @ 5.33 fps)
2=18"CMP Riser (Passes< 10.06 cfs potential flow)
3=3"Skimmer (Passes<0.11 cfs potential flow)
4=20'Secondary Spillway (Weir Controls 17.23 cfs @ 1.93 fps)

Basin #11 Type 1124-hr 25 yr Rainfa/i=6.15"
Prepared by(enter your company name here) Printed 8/1/2023
HydroCAD®10.00-26 s/n 07329 O 2020 HydroCAD Software Solutions LLC Page 6
Summary for Subcatchment IS: Watershed#11
Runoff = 61.75 cfs @ 11.99 hrs, Volume= 3.571 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
7.870 94 Newly graded area, HSG D
7.870 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
2.9 100 0.0400 0.57 Sheet Flow, Sheet
Fallow n=0.050 P2=3.55"
5.4 540 0.0280 1.67 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare& Untilled Kv= 10.0 fps
8.3 640 Total

R A
Basin #11 Type 11 24-hr 25 yr Rainfall=6.15"
Prepared by{enter your company name here} Printed 8/1/2023
HydroCADO 10 00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 7
Summary for Pond 1 P: Basin #11
Inflow Area= 7.870 ac, 0.00% Impervious, Inflow Depth= 5.45" for 25 yr event
Inflow - 61.75 cfs @ 11.99 hrs, Volume= 3.571 of
Outflow = 37.46 cfs @ 12.09 hrs, Volume= 3.571 af, Atten=39%, Lag=5.9 min
Primary = 37.46 cfs @ 12.09 hrs, Volume= 3.571 of
Routing by Stor-Ind method,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=244.61' @ 12.09 hrs Surf.Area=30,035 sf Storage=69,006 cf
Plug-Flow detention time=497.8 min calculated for 3.570 of(100%of inflow)
Center-of-Mass det. time=499.4 min ( 1,265.7-766.4)
Volume Invert Avail Storage Storage Description
#1 242.00' 113,299 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
242.00 22,500 0 0
243.00 25,558 24,029 24,029
244.00 28,317 26,938 50,967
245.00 31,148 29,733 80,699
246.00 34,052 32,600 113,299
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 7' 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=36.83 cfs @ 12.09 hrs HW=244.60' (Free Discharge)
=12"CMP Barrel (Barrel Controls 4.31 cfs @ 5.48 fps)
2=18"CMP Riser (Passes < 10.76 cfs potential flow)
3=3"Skimmer (Passes < 0.11 cfs potential flow)
4=20'Secondary Spillway (Weir Controls 32.52 cfs @ 2.30 fps)

1S v 1P
Watershed #12 Basin #12
SUbcat Reach On Link Routing Diagram for Basin#12
Prepared by tenter your company name here}, Printed B/1/2023
Hydr.CAD�10.00.26 s/n 07329 ©2020 HydroCAD Software Solutions LLC

Basin #12 Type 1124-hr 2 yr Rainfall=3.55r'
Prepared by{enter your company name here} Printed 8/1/2023
HydroCAD®10.00-26 s/n 07329 O 2020 HydroCAD Software Solutions LLC Page 2
Summary for Subcatchment 1S: Watershed#12
Runoff = 124.74 cfs @ 12.04 hrs, Volume= 8.038 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
33.440 94 Newly graded area, HSG D
33.440 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
2.7 100 0.0480 0.61 Sheet Flow, Sheet
Fallow n=0.050 P2=3.55"
10.3 1,053 0.0290 1.70 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare&Untilled Kv= 10.0 fps
13.0 1,153 Total

Basin#12 Type Il 24-hr 2 yr Rainfall=3.55"
Prepared by{enter your company name here} Printed 8/1/2023
HydroCADO 10.00-26 s/n 07329 O 2020 HydroCAD Software Solutions LLC Page 3
Summary for Pond 1 P: Basin #12
Inflow Area = 33.440 ac, 0.00% Impervious, Inflow Depth = 2.88" for 2 yr event
Inflow = 124.74 cfs @ 12.04 hrs, Volume= 8.038 of
Outflow = 4.35 cfs @ 14.19 hrs, Volume= 5.673 af, Atten= 97%, Lag= 128.7 min
Primary = 4.35 cfs @ 14.19 hrs, Volume= 5.673 of
Routing by Stor-Ind method, Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=232.67'@ 14.19 hrs Surf.Area=96,253 sf Storage=239,015 cf
Plug-Flow detention time= 1,415.4 min calculated for 5.670 of(71%of inflow)
Center-of-Mass det. time= 1,322.7 min (2,109.6-786.9 )
Volume Invert Avail Storage Storage Description
#1 230.00' 588,736 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic-feet) (cubic-feet)
230.00 82,100 0 0
231.00 87,319 84,710 84,710
232.00 92,622 89,971 174,680
233.00 98,002 95,312 269,992
234.00 103,457 100,730 370,722
235.00 108,988 106,223 476,944
236.00 114,595 1111792 588,736
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
#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=4.35 cfs @ 14.19 hrs HW=232.67' (Free Discharge)
=12"CMP Barrel (Barrel Controls 4.35 cfs @ 5.54 fps)
2=-18"CMP Riser (Passes <6.99 cfs potential flow)
3=4"Skimmer (Passes < 0.23 cfs potential flow)
4=20'Secondary Spillway ( Controls 0.00 cfs)

Basin#12 Type Il 24-hr 10 yr Rainfall=5.97"
Prepared by{enter your company name here} Printed 8/1/2023
HydroCAD®10.00-26 s/n 07329 O 2020 HydroCAD Software Solutions LLC Page 4
Summary for Subcatchment 1S: Watershed#12
Runoff = 188.63 cfs @ 12.04 hrs, Volume= 12.472 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
33.440 94 Newly graded area, HSG D
33.440 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
2.7 100 0.0480 0.61 Sheet Flow, Sheet
Fallow n=0.050 P2=3.55"
10.3 1,053 0.0290 1.70 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare& Untilled Kv= 10.0 fps
13.0 1,153 Total

I
Basin #12 Type 1124-hr 10 yr Rainfall=5.17"
Prepared by{enter your company name here} Printed 8/1/2023
HydroCADO 10 00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 5
Summary for Pond 1P: Basin #12
Inflow Area= 33.440 ac, 0.00% Impervious, Inflow Depth= 4.48" for 10 yr event
Inflow = 188.63 cfs @ 12.04 hrs, Volume= 12.472 of
Outflow = 31.41 cfs @ 12.41 hrs, Volume= 10.061 af, Atten=83%, Lag=22.1 min
Primary - 31.41 cfs @ 12.41 hrs, Volume= 10.061 of
Routing by Stor-Ind method,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=233.53' @ 12.41 hrs Surf.Area= 100,873 sf Storage=323,007 cf
Plug-Flow detention time= 922.8 min calculated for 10.057 of(81%of inflow)
Center-of-Mass det. time=846.5 min ( 1,622.0-775.5 )
Volume Invert Avail Storage Storage Description
#1 230.00' 588,736 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq-ft) (cubic feet) (cubic-feet)
230.00 82,100 0 0
231.00 87,319 84,710 84,710
232.00 92,622 89,971 174,680
233.00 98,002 95,312 269,992
234.00 103,457 100,730 370,722
235.00 108,988 106,223 476,944
236.00 114,595 111,792 588,736
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 1 232.00' 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
#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
ri
ary OutFlow Max=31.32 cfs @ 12.41 hrs HW=233.53' (Free Discharge)
=12"CMP Barrel (Barrel Controls 4.83 cfs @ 6.15 fps)
3112=18"CMP Riser (Passes< 10.51 cfs potential flow)
=4"Skimmer (Passes <0.23 cfs potential flow)
4=20'Secondary Spillway (Weir Controls 26.49 cfs @ 2.18 fps)

J �
Basin #12 Type 11 24-hr 25 yr Rainfall=6.15"
Prepared by{enter your company name here} Printed 8/1/2023
HydroCAD®10 00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 6
Summary for Subcatchment IS: Watershed#12
Runoff = 226.92 cfs @ 12.04 hrs, Volume= 15.174 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
33.440 94 Newly graded area, HSG D
33.440 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ftlft) (ft/sec) (cfs)
2.7 100 0.0480 0.61 Sheet Flow,Sheet
Fallow n=0.050 P2=3.55"
10.3 1,053 0.0290 1.70 Shallow Concentrated Flow,Shallow Concent.
Nearly Bare& Untilled Kv= 10.0 fps
13.0 1,153 Total

9C 9
Basin #12 Type 1124-hr 25 yr Rainfall=6.15"
Prepared by{enter your company name here} Printed 8/1/2023
HydroCADO 10.00-26 s/n 07329 O 2020 HydroCAD Software Solutions LLC Page 7
Summary for Pond 1 P: Basin #12
Inflow Area = 33.440 ac, 0.00% Impervious, Inflow Depth = 5.45" for 25 yr event
Inflow = 226.92 cfs @ 12.04 hrs, Volume= 15.174 of
Outflow - 70.22 cfs @ 12.27 hrs, Volume= 12.747 af, Atten=69%, Lag= 13.5 min
Primary = 70.22 cfs @ 12.27 hrs, Volume= 12.747 of
Routing by Stor-Ind method,Time Span=0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=233.93' @ 12.27 hrs Surf.Area= 103,072 sf Storage=363,619 cf
Plug-Flow detention time=760.0 min calculated for 12.741 of(84% of inflow)
Center-of-Mass det. time=691.6 min ( 1,462.3-770.7 )
Volume Invert Avail.Storage Storage Description
#1 230.00' 588,736 cf Custom Stage Data(Prismatic)Listed below
Elevation Surf.Area Inc.Store Cum.Store
(feet) (sq ft) (cubic-feet) (cubic-feet)
230.00 82,100 0 0
231.00 87,319 84,710 84,710
232.00 92,622 89,971 174,680
233.00 98,002 95,312 269,992
234.00 103,457 100,730 370,722
235.00 108,988 106,223 476,944
236.00 114,595 111,792 588,736
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
#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=69.66 cfs @ 12.27 hrs HW=233.92' (Free Discharge)
=12"CMP Barrel (Barrel Controls 5.04 cfs @ 6.42 fps)
2=18"CMP Riser (Passes< 11.80 cfs potential flow)
3=4"Skimmer (Passes<0.23 cfs potential flow)
4=20'Secondary Spillway (Weir Controls 64.62 cfs @ 2.73 fps)