20240314_Figures_Calculations

62S
ENGINEERING & ENVIRONMENTAL SCIENCE COMPANY
3008 ANDERSON DRIVE,SUITE 102
RALEIGH,NC 27609
[phone]
March 8,2024
Mr. Steve Wyse
General Shale Brick,Inc.
300 Brick Plant Rd.
Moncure,NC 27559
Re: Erosion Control Evaluation
Mine Permit Modification
Brickhaven Mine#2 Tract B
Permit No.19-08
Chatham County,NC
Dear Mr. Wyse:
Engineering& Environmental Science Company (E2S)has completed the evaluation of the mine
permit modification for the above-referenced mine. Separately submitted are the mine maps and
application.
GENERAL PROJECT DISCUSSION
The Brickhaven Mine#2 Tract B(Permit No. 19-08)located in Chatham County,North Carolina,
contains 348 acres of permitted land (See Attachment, Vicinity Map). Currently, the permitted
allowable affected acreage is 144 acres. It is proposed to add an additional 117 acres of affected
acreage, for a total of 261 acres of allowable affected acreage. This additional acreage is located
within the mining permit limits,and no change to the total permitted area is proposed.
Mining will continue as permitted in the existing mine area,south of the Progress Energy easement
that bisects the site. Erosion control for the proposed new mining area will consist of twelve (12)
new sediment basins(Basins 1 through 12).Earthen berms will be constructed to divert stormwater
runoff to these basins.
After mining activities are complete, lakes will be formed, with exposed ground above the water
table sloped towards the lakes at a maximum slope 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.

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 60.7 and
106.4 hours.
Perimeter berms will be used to divert the stormwater runoff to the basins. Trash racks will be
provided for the CMP riser pipes.For each basin,a 10'or 20'wide secondary spillway is provided.
The secondary spillway is only activated for rain events greater than the 2-year rain event. The
basins can pass the 25-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,
� R'(HARO�C '/oi•.���•O �
�ocESS�pN!ti9%
T. Patrick Shillington,P. x
President 15472 r � �
Attachment A: Figures
Attachment B: Calculations ''�i�r�Pj
�2�

1
Attachment A:Figures

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Briehlla�en
ENGINEERING&ENVIRONMENTAL
SCIENCE COMPANY
3008 ANDERSON DR.,SUITE 102
RALEIGH,NORTH CAROLINA 27609
J [phone]
USGS Map A
Brickhaven Mine#2 TractScale: t^=2000' Mine Permit No. 19-08
Chatham Co., NC

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r:C,
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r
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F„B
Hydrological N
Soil Symbol Soil Name Group
WhD White Store D
CcB Carbonton C
MCC Mattadoni C Scale: I"=1000,
2 ENGINEERING&ENVIRONMENTAL
WhC White Store D SCIENCE COMPANY
3008 ANDERSON DR.,SUITE 102
PeB Peawick D RALEIGH,NORTH CAROLINA 27609
[phone]
PeA Peawick D
DATE:
WhB White store D USDA Soil Survey
Brickhaven Mine#2 Tract B sizsrz,
ChA Chewacla C Mine Permit No. 19-08 "°°"'""
Udc Udorthents B Chatham Co., NC 2

Proposed Mine Expansion
2 ENGINEERING 8 ENVIRONMENTAL
N SCIENCE COMPANY
J RALEIIGH,,NORTH
AR LINA 27609
�y
DATE:
National Wetlands Inventory Map
Brickhaven Mine#2 Tract B 9/2M'
Mine Permit No. 19-08 "°�"°
Scale: 1" = 1000' Chatham Co., NC 3

Attachment B: Calculations

NOAA Atlas 14,Volume 2,Version 3
Location name:Moncure, North Carolina,USA`
• Latitude:35.5996°,Longitude:-79.0076°
Elevation:228 ft" }
'source:ESRI Maps
"source:USGS
POINT PRECIPITATION FREQUENCY ESTIMATES
G.M.Bonin,D.Martin,B.Lin,T.Parzybok,M.Yekta,and D.Riley
NOAA,National Weather Service,Silver Spring.Maryland
PF tabular I PF qraphical I Maps & aerials
PF tabular
PDS-based point precipitation frequency estimates with 90% confidence intervals (in inches)1
Average recurrence interval(years)
Duration��� 10F 25 50 100 200 500 1000
5-min 0.419 7 0.492 0.569 0.629 0.695 0.741 0.784 0.821 0.864 0.898
0.383-0.459 0.450-0.541 0.520-0.625) (0.573-0.689)1(0.630-0.760) (0.670-0.811) (0.705-0.857) (0,735-0.899) (0.766-0.946) (0.789-0.984
1 0.669 0.788 0.912 1.01 1.11 1.18 1.25 1.30 1.37 1.41
0-min
(0.611-0,734) 0.720-0.865 (0.833-1.00) 1(0.917-1.10) 1 (1,00-1.21) 1.07-1.29 (1.12-1.36) 1 (1.16-1.42) 1 (1.21-1.50) 1 (1.24-1.55
15- 0.836 0 1.1.990 5 1.27 1.40
min 1.50 1.58 1.64 1.72 1.77
(0364-0.917 0.905-1.09 1.05-1.26 1.16-1.39 1,27-1,64 1.35-1.64 1.42-1.72 1.47-1.80 1.52-1.88) 1.56-1.94
30-min 1.15 1.37 1.64 1.84 2.08 2.25 2.41 2.56 2.74 2.87
1.05-1.26) 1.25-1.50 1.50-1.80 1.68-2.02 1.89-2.28 2.04-2.46 (2.17-2.64) (2.29-2.80) 2.433.00) 2.53-3.15
60in 1.43 1.72 2.10 2.40 2.77 3.05 3.32 3.59 3.93 4.20
-m
(1.31-1.57) (1.57-1.88) (1.92-2.30) (2.19-2.63) (2.51-3.03) 2.76-3.34) 2.99-3.63 (3.21-3.92) (3.484.30) (3.694.60
2-hr 1.68 2.02 2.50 F 2.89 3.38 3.77 4.15 4.54 5.05 5.46
(1.52-1.86) (1.84-2.24) (2.27-2.77) (2.61-3.20) (3.04-3.73) (3.37A.16) (3.69-4.59) (4.01-5.01) (4.42-5.57) (4.73-6.03)
3-hr (1.62 1897 (1.95 2.38 (2.2-2?96 2,811.42) (3.0-4.04 (3.9�t.55) (4.0755.06 4.475?59) (4.99 6332) (5.0?6.92)
6-hr 2.13 2.56 3.19 3.72 4.41 4.99 5.58 6.19 7.04 7.74
(1.95-2.35) (2.35-2.83) (2.91-3.52) (3.38A.09) (3.98A.84) (4.48-5.47) (4.956.10) (5.45-6.77) (6.11-7.69) (6.64-8.47)
12-hr 2.52 3.04 3.80 4.45 5.32 6.06 6.82 7.63 8.76 9.72
- (2.30-2.78)- 1 (2:78-3.35) (3.464:19) (4.03-4.89) (4.79-5.84) (5.41-6.62) -(6.03-7.45) 1 (6.67-8:33)- -(7.54-9 56) (8.24-10.6)-
24-hr 2.743415) 3.2-34.81) (4.164.78) (4.825.55) 5.716.60) 6.2--7A2) (7.14827) (7,87-9.16) (8.87-610.4) (9.6-111.3
3.41 - -4.11 5.13. .. 5.93 7.02 -- 7.88 8.76 9.66 10.9 11.9
2 day (3.183.67) (3.834.42) (4.77-5.52) (5.518.37) 6.50-7.53) (7.278.46) (8.06-9.40) 8.87-lo.4) 9.96-11.7) (10.8-12.8
F3Zy3.61 4.34 5.39 6.21 7.34 8.23 9.14 10.1 11.4 12.4
3-day (3.36-3.87) (4.054.66) (5.01-5.78) (5.776.66) (6.79-7.87) (7.59-8.82) (8.41-9.81) (9.24-10.8) (10.4-12.2) (11.3-13.3)
4-day 3.81 4.57 5.65 6.49 7.66 8.58 9.52 10.5 11.8 12.9
3.55-4.08) 4.264.90 (5.26-6.05) (6.036.95) (7.088.20) (7.90-9.19) (8.75-10.2) (9.62-11.3) (10.8-12.7) (11.7-13.8)
74ay4.38 5.23 7F 6.38 7.28 8.54 9.53 10.5 11.6 13.0 14.1
4.104.68 4.89-5.59 (5,96-6.81) (6.80-7.78) 94-9.11) (8.84-10.2) (9.76-11.3) (10.7-12.4) (12.0-13.9) (12.9-15.1)
10-day 5.00 5.96 7.17 8.12 9.40 10.4 11.4 12.5 ]F 1-38-1 14.9
(4.706.34) 5.59-6.35 6.72-7.64) (7.60-8.65) (8.77-10.0 9.68-11.1 (10.6-12.2) 1 (11.5-13.3) 1 (12.8-14.8) (13.7-16.0
20-day 6.2 7.14) 7.6 8?42 8.039.96) 9.87--11.2 11 3-12.8 12.4-14.1 (13.15-15.4 14.16-16.7 (16.1176 7.5) 1 2 9.9
30-day 8.35 9.82 11.4 12.7 14.3 15.6 16.8 18.1 19.7 21.0
7.878.86) 9.25-10.4) 10.8-12.1 (11.9-13.5) 1 (13.4-15.2) (14.6-16.6 (15.7-17.9) (16.9-19.2) 11 (18.3-21.1) (19.5-22.4)
45-day 10.6 12.5 14.3 15.7 17.5 18.9 20.2 21.5 23.2 24.5
(10.1-11.2) 1 (11.8-13.2) 11 (13.5-15.1 (14.8-16.5) 11 (16.5-18.4) (17.8-19.9) (19.0-21.3) (20.2-22.7) 11 (21.7-24.6) (22.9-26.0)
60-day (12213.4 I41 5.7 16.10--187.7 1748 9.3 192021.4 (2 6'2.9) (219324.4 (23214 5.9 (247627.8) 259?9.2
1 Precipitation frequency(PF)estimates in this table are based on frequency analysis of partial duration series(PDS).
Numbers in parenthesis are PF estimates at lower and upper bounds of the 90%confidence interval.The probability that precipitation frequency estimates(for
a given duration and average recurrence interval)will be greater than the upper bound(or less than the lower bound)is 5%.Estimates at upper bounds are not
checked against probable maximum precipitation(PMP)estimates and may be higher than currently valid PMP values.
Please refer to NOAA Atlas 14 document for more information.
Back to Top
PF graphical

Anti-Flotation Calculations for Basins
General Shale-Byickhave Mine#2 Tract B
18"Dia. Riser Area=3.14*0.75'A2= 1.77
Height of Riser=3 ft.
Volume Displaced by Riser= 1.77 ft*3 ft=5.31 cf
Bouyant Force=5.31 cf*62.4 lb/cf=331 lb
Factor of Safety=2
331 Ib*2.0(F.S)=Vconc(145-62.4)
Volume of Concrete needed =8.01 cf
Use 4'x 4'x 1'Concrete Anti-Flotation Block.

is
�` 1P
Watershed #1 Basin #1
SubCat Reach On Link Routing Diagram for Basin#1
Prepared by E2S
HydroCAD@ 10.00-26 s/n 07329 ©2020 HydroCAD Softy re Solutions LLC

Basin #1 Type 1124-hr 2 yr Rainfall=3.55"
Prepared by E2S
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 2
Summary for Subcatchment IS: 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

a a
Basin #1 Type //24-hr 2 yr Rainfall=3.55"
Prepared by E2S
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 3
Summary for Pond 1 P: Basin #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 RoutinggInvert 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=3.85 cfs @ 12.32 hrs HW=241.87' (Free Discharge)
1=12"CMP Barrel (Barrel Controls 3.85 cfs @ 4.90 fps)
t2=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 1124-hr 10 yr Rainfall=5.17"
Prepared by E2S
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 4
Summary for Subcatchment 1 S: 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

a
Basin #1 Type 1124-hr 10 yr Rainfall=5.17"
Prepared by E2S
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 5
Summary for Pond 1 P: Basin #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)
=10' Secondary Spillway (Weir Controls 9.11 cfs @ 1.83 fps)

Basin #1 Type //24-hr 25 yr Rainfall=6.95"
Prepared by E2S
HydroCADO 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 11 24-hr 25 yr Rainfall=6.15"
Prepared by E2S
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 7
Summary for Pond 1 P: Basin #1
Inflow Area = 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 OutlefDevices _
#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)

1 i
N 1 P
Watershed #2 Basin #2
Subcat Reach Pon Link Routing Diagram for Basin#2
Prepared by E2S
FHydroCADO 10.00-26 s/n 07329 0 2020 HydroCAD Software Solutions LLC

Basin #2 Type 1124-hr 2 yr Rainfall=3.55"
Prepared by E2S
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 2
Summary for Subcatchment IS: 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

a •
Basin #2 Type 1!24-hr 2 yr Rainfall=3.55"
Prepared by E2S
HydroCADO 10.00-26 sh 07329 ©2020 HydroCAD Software Solutions LLC Pace 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 '/' 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)
1=12" CMP Barrel (Barrel Controls 4.47 cfs @ 5.70 fps)
L.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)

A. I
Basin #2 Type 1124-hr 10 yr Rainfall=5.17"
Prepared by E2S
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 4
Summary for Subcatchment 1 S: 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 E2S
HydroCAD®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=0.02007' 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)
=12"CMP Barrel (Barrel Controls 4.82 cfs @ 6.14 fps)
2=18"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)

s t
Basin #2 Type 11 24-hr 25 yr Rainfall=6.95"
Prepared by E2S
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 6
Summary for Subcatchment IS: 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& Untilled Kv= 10.0 fps
22.4 1,523 Total

4
Basin #2 Type 1124-hr 25 yr Rainfall=6.15"
Prepared by E2S
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 7
Summary for Pond 1 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 '/' 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)
1=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)
=20' Secondary Spillway (Weir Controls 43.65 cfs @ 2.48 fps)

Watershed #3 Basin #3
Subcat Reach on Link Routing Diagram for Basin#3
Prepared by E2S
HydroCAD0 00.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC

♦ r
Basin #3 Type 1124-hr 2 yr Rainfall=3.55"
Prepared by E2S
HydroCADO 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 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
6.380 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 1124-hr 2 yr Rainfall=3.55"
Prepared by E2S
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 3
Summary for Pond 1 P: Basin #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 = 3.87 cfs @ 12.35 hrs, Volume= 1.534 af, Atten= 85%, Lag= 20.2 min
Primary = 3.87 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=240.91' @ 12.35 hrs Surf.Area=20,369 sf Storage= 35,767 cf
Plug-Flow detention time=849.0 min calculated for 1.534 of(100% of inflow)
Center-of-Mass det. time=848.9 min ( 1,633.1 -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 241822 106,950
Device Routing Invert Outlet Devices
#1 Primary 238.00' 12.0" Round-12"CMP Barrel
L= 50.0' CMP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert= 238.00'/237.00' S=0.0200'/' Cc= 0.900
n= 0.025 Corrugated metal, Flow Area=0.79 sf
#2 Device 1 240.00' 18.0" Horiz. 18"CMP Riser C= 0.600
Limited to weir flow at low heads
#3 Device 1 239.00' 0.072 cfs 2.5"Skimmer
#4 Primary 241.00' 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=3.87 cfs @ 12.35 hrs HW=240.91' (Free Discharge)
=12"CMP Barrel (Barrel Controls 3.87 cfs @ 4.93 fps)
2=18"CMP Riser (Passes < 8.09 cfs potential flow)
3=2.5"Skimmer (Passes < 0.07 cfs potential flow)
4=20' Secondary Spillway ( Controls 0.00 cfs)

6
Basin #3 Type 1l 24-hr 10 yr Rainfall=5.9 7"
Prepared by E2S
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 II 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

Basin #3 Type 11 24-hr 10 yr Rainfall=5.17"
Prepared by E2S
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 5
Summary for Pond 1 P: 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 = 23.29 cfs @ 12.12 hrs, Volume= 2.380 af, Atten=41%, Lag=6.7 min
Primary = 23.29 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=241.43' @ 12.12 hrs Surf.Area=21,263 sf Storage=46,748 cf
Plug-Flow detention time= 577.6 min calculated for 2.380 of(100% of inflow)
Center-of-Mass det. time= 577.5 min ( 1,350.3-772.8 )
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 '/' Cc=0.900
n= 0.025 Corrugated metal, Flow Area= 0.79 sf
#2 Device 1 240.00' 18.0" Horiz. 18"CMP Riser C= 0.600
Limited to weir flow at low heads
#3 Device 1 239.00' 0.072 cfs 2.5"Skimmer
#4 Primary 241.00' 20'Secondary Spillway, C=3.27
Offset(feet) 0.00 4.50 24.50 29.00
Height(feet) 1.50 0.00 0.00 1.50
Primary OutFlow Max=22.43 cfs @ 12.12 hrs HW=241.41' (Free Discharge)
1=12"CMP Barrel (Barrel Controls 4.19 cfs @ 5.34 fps)
�3
2=18"CMP Riser (Passes < 10.11 cfs potential flow)
2.5 Skimmer (Passes < 0.07 cfs potential flow)
4=20' Secondary Spillway (Weir Controls 18.23 cfs @ 1.96 fps)

Basin #3 Type 11 24-hr 25 yr Rainfall=6.1 5"
Prepared by E2S
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 6
Summary for Subcatchment 1 S: 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 & Until led Kv= 10.0 fps
10.1 548 Total

Basin #3 Type /124-hr 25 yr Rainfall=6.15"
Prepared by E2S
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 7
Summary for Pond 1 P: Basin #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 = 34.83 cfs @ 12.09 hrs, Volume= 2.895 af, Atten= 26%, Lag= 5.2 min
Primary = 34.83 cfs @ 12.09 hrs, Volume= 2.895 of
Routing by Stor-Ind method, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Peak Elev=241.58' @ 12.09 hrs Surf.Area= 21,519 sf Storage= 49,940 cf
Plug-Flow detention time=487.5 min calculated for 2.895 of(100% of inflow)
Center-of-Mass det. time=487.4 min ( 1,255.4- 768.0 )
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 231106 82,128
244.00 25,680 24,822 106,950
Device Routing Invert Outlet Devices
#1 Primary 23&00' 12.0" Round 12"CMP Barrel
L= 50.0' CMP, projecting, no headwall, Ke= 0.900
Inlet/Outlet Invert=238.00'/237.00' S= 0.0200'/' Cc= 0.900
n=0.025 Corrugated metal, Flow Area=0.79 sf
#2 Device 1 240.00' 18.0" Horiz. 18"CMP Riser C= 0.600
Limited to weir flow at low heads
#3 Device 1 239.00' 0.072 cfs 2.5"Skimmer
#4 Primary 241.00' 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=34.42 cfs @ 12.09 hrs HW=241.57' (Free Discharge)
=12"CMP Barrel (Barrel Controls 4.29 cfs @ 5.46 fps)
2=18"CMP Riser (Passes < 10.66 cfs potential flow)
3=2.5"Skimmer (Passes < 0.07 cfs potential flow)
4=20' Secondary Spillway (Weir Controls 30.13 cfs @ 2.25 fps)

1S 1P
Watershed #4 Basin #4
Subcat Reach On Link Routing Diagram for Basin#4
Prepared by E2S
HydroCAD a0 00.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC

a
Basin #4 Type //24-hr 2 yr Rainfall=3.55"
Prepared by E2S
HydroCADO 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

Basin #4 Type //24-hr 2 yr Rainfall=3.55N
Prepared by E2S
HydroCAD®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 = 3.76 cfs @ 12.26 hrs, Volume= 1.406 af, Atten=85%, Lag= 16.6 min
Primary = 3.76 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=248.74' @ 12.26 hrs Surf.Area=20,539 sf Storage= 32,888 cf
Plug-Flow detention time= 917.8 min calculated for 1.406 of(100% of inflow)
Center-of-Mass det. time= 919.5 min ( 1,701.5-782.0 )
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' 0.072 cfs 2.5"Skimmer
#4 Primary 249.00' 10'Secondary Spillway, C=3.27
Offset(feet) 0.00 4.50 14.50 19.00
Height(feet) 1.50 0.00 0.00 1.50
Primary OutFlow Max=3.76 cfs @ 12.26 hrs HW=248.74' (Free Discharge)
1=12"CMP Barrel (Barrel Controls 3.76 cfs @ 4.79 fps)
t.2=18"CMP Riser (Passes < 7.33 cfs potential flow)
3 2.5 Skimmer (Passes < 0.07 cfs potential flow)
=10' Secondary Spillway ( Controls 0.00 cfs)

Basin #4 Type /124-hr 10 yr Rainfali=5.1 7"
Prepared by E2S
HydroCADO 10.00-26 s/n 07329 ©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 & Until led Kv= 10.0 fps
7.7 507 Total

Basin #4 Type //24-hr 10 yr Rainfall=5.17"
Prepared by E2S
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 5
Summary for Pond 1 P: Basin #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 = 14.29 cfs @ 12.12 hrs, Volume= 2.182 af, Atten= 63%, Lag= 8.3 min
Primary = 14.29 cfs @ 12.12 hrs, Volume= 2.182 of
Routing by Stor-Ind method, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Peak Elev= 249.43' @ 12.12 hrs Surf.Area= 21,984 sf Storage= 47,519 cf
Plug-Flow detention time= 628.2 min calculated for 2.181 of(100% of inflow)
Center-of-Mass det. time=630.0 min ( 1,400.6 -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 241310 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' 0.072 cfs 2.5"Skimmer
#4 Primary 249.00' 10'Secondary Spillway, C=3.27
Offset (feet) 0.00 4.50 14.50 19.00
Height(feet) 1.50 0.00 0.00 1.50
Primary OutFlow Max=13.88 cfs @ 12.12 hrs HW=249.42' (Free Discharge)
E=12" CMP Barrel (Barrel Controls 4.20 cfs @ 5.34 fps)
2=18" CMP Riser (Passes < 10.13 cfs potential flow)
3=2.5" Skimmer (Passes < 0.07 cfs potential flow)
4=10' Secondary Spillway (Weir Controls 9.68 cfs @ 1.86 fps)

• w
Basin #4 Type //24-hr 25 yr Rainfaii=6.?5"
Prepared by E2S
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 6
Summary for Subcatchment IS: 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

Basin #4 Type //24-hr 25 yr Rainfall=6.15"
Prepared by E2S
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 7
Summary for Pond 1 P: Basin #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 = 24.56 cfs @ 12.09 hrs, Volume= 2.655 af, Atten=47%, Lag=6.5 min
Primary = 24.56 cfs @ 12.09 hrs, Volume= 2.655 of
Routing by Stor-Ind method, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Peak Elev= 249.66' @ 12.09 hrs Surf.Area=22,476 sf Storage= 52,611 cf
Plug-Flow detention time= 529.9 min calculated for 2.653 of(100% of inflow)
Center-of-Mass det. time= 531.8 min ( 1,297.6-765.8 )
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' 0.072 cfs 2.5"Skimmer
#4 Primary 249.00' 10'Secondary Spillway, C=3.27
Offset(feet) 0.00 4.50 14.50 19.00
Height (feet) 1.50 0.00 0.00 1.50
Primary OutFlow Max=24.31 cfs @ 12.09 hrs HW=249.65' (Free Discharge)
1=12"CMP Barrel (Barrel Controls 4.34 cfs @ 5.53 fps)
t2=18"CMP Riser (Passes < 10.94 cfs potential flow)
3 2.5 Skimmer (Passes < 0.07 cfs potential flow)
-10' Secondary Spillway (Weir Controls 19.97 cfs @ 2.20 fps)

1S
Watershed #5 Basin #5
SUbCat Reach on Link Routing Diagram for Basin#5
Prepared by E2S
HydroCADO 10.00-26 s/n 07329 0 2020 HydroCAD Software Solutions LLC

Basin #5 Type //24-hr 2 yr Rainfall=3.55"
Prepared by E2S
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 2
Summary for Subcatchment IS: 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

'a •
Basin #5 Type 1124-hr 2 yr Rainfall=3.55"
Prepared by E2S
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 3
Summary for Pond 1 P: Basin #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 - Iriverf Outlet Devices
#1 Primary 236.00' 12.0" Round 12"CMP Barrel
L=50.0' CMP, projecting, no headwall, Ke= 0.900
Inlet 1 Outlet Invert= 236.00'1235.00' S=0.0200 7' Cc= 0.900
n=0.025 Corrugated metal, Flow Area= 0.79 sf
#2 Device 1 238.00' 18.0" Horiz. 18"CMP Riser C= 0.600
Limited to weir flow at low heads
#3 Device 1 237.00' 0.110 cfs 3" Skimmer
#4 Primary 239.00' 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)
1=12"CMP Barrel (Barrel Controls 3.83 cfs @ 4.88 fps)
L2=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)

Basin #5 Type 1124-hr 10 yr Rainfall=5.17"
Prepared by E2S
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 4
Summary for Subcatchment IS: Watershed #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 II 24-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

Basin #5 Type //24-hr 10 yr Rainfall=5.17"
Prepared by E2S
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 5
Summary for Pond 1 P: Basin #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 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=24.92 cfs @ 12.12 hrs HW=239.45' (Free Discharge)
1=12"CMP Barrel (Barrel Controls 4.22 cfs @ 5.37 fps)
L2=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)

i
Basin #5 Type 1124-hr 25 yr Rainfall=6.15"
Prepared by E2S
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 6
Summary for Subcatchment 1 S: 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

Basin #5 Type 1124-hr 25 yr Rainfall=6.15"
Prepared by E2S
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 7
Summary for Pond 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'/' 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)
1=12"CMP Barrel (Barrel Controls 4.35 cfs @ 5.53 fps)
t2=18"CMP Riser (Passes < 10.98 cfs potential flow)
3=3"Skimmer (Passes < 0.11 cfs potential flow)
=20'Secondary Spillway (Weir Controls 38.35 cfs @ 2.40 fps)

i
S 1P
Watershed #6 Basin #6
SUbCaf Reach OD Link Routing Diagram for Basin#6
Prepared by E2S
HydroCADO 10.00-26 sln 07329 ©2020 HydroCAD Software Solutions LLC

Basin #6 Type 1124-hr 2 yr Rainfall=3.55"
Prepared by E2S
HydroCADO 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) (fUsec) (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 11 24-hr 2 yr Rainfall=3.55"
Prepared by E2S
HydroCADO 10.00-26 s/n 07329 0 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 = 3.85 cfs @ 12.33 hrs, Volume= 1.238 af, Atten= 81%, Lag= 18.2 min
Primary = 3.85 cfs @ 12.33 hrs, Volume= 1.238 of
Routing by Stor-Ind method, Time Span= 0.00-120.00 hrs, dt=0.05 hrs
Peak Elev= 233.88' @ 12.33 hrs Surf.Area= 17,380 sf Storage= 29,287 cf
Plug-Flow detention time= 951.7 min calculated for 1.238 of(97% of inflow)
Center-of-Mass det. time= 933.3 min ( 1,718.9 - 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 Rodting _Inverf Outlet Devices-'-----
#1 Primary 231.00' 12.0" Round 12"CMP Barrel
L=50.0' CMP, projecting, no headwall, Ke= 0.900
Inlet/Outlet Invert=231.00'/230.00' S=0.0200 7' Cc= 0.900
n=0.025 Corrugated metal, Flow Area= 0.79 sf
#2 Device 1 233.00' 18.0" Horiz. 18"CMP Riser C= 0.600
Limited to weir flow at low heads
#3 Device 1 232.00' 0.038 cfs 2"Skimmer
#4 Primary 234.00' 10'Secondary Spillway,C=3.27
Offset(feet) 0.00 4.50 14.50 19.00
Height (feet) 1.50 0.00 0.00 1.50
Primary OutFlow Max=3.85 cfs @ 12.33 hrs HW=233.88' (Free Discharge)
1=12"CMP Barrel (Barrel Controls 3.85 cfs @ 4.91 fps)
�2=18"CMP Riser (Passes < 7.98 cfs potential flow)
3=2"Skimmer (Passes < 0.04 cfs potential flow)
4=10' Secondary Spillway ( Controls 0.00 cfs)

o .
Basin #6 Type 11 24-hr 10 yr Rainfall=5.17"
Prepared by E2S
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 4
Summary for Subcatchment 1 S: 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 II 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

Basin #6 Type 11 24-hr 10 yr Rainfall=5.17"
Prepared by E2S
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 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 = 15.52 cfs @ 12.17 hrs, Volume= 1.944 af, Atten= 50%, Lag= 8.5 min
Primary = 15.52 cfs @ 12.17 hrs, Volume= 1.944 of
Routing by Stor-Ind method, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Peak Elev= 234.46' @ 12.17 hrs Surf.Area= 18,581 sf Storage= 39,833 cf
Plug-Flow detention time= 634.4 min calculated for 1.943 of(98% of inflow)
Center-of-Mass det. time=622.5 min ( 1,396.7-774.2 )
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 '/' Cc=0.900
n= 0.025 Corrugated metal, Flow Area= 0.79 sf
#2 Device 1 233.00' 18.0" Horiz. 18"CMP Riser C= 0.600
Limited to weir flow at low heads
#3 Device 1 232.00' 0.038 cfs 2"Skimmer
#4 Primary 234.00' 10'Secondary Spillway,C=3.27
Offset(feet) 0.00 4.50 14.50 19.00
Height(feet) 1.50 0.00 0.00 1.50
Primary OutFlow Max=15.18 cfs @ 12.17 hrs HW=234.45' (Free Discharge)
1=12"CMP Barrel (Barrel Controls 4.22 cfs @ 5.37 fps)
12=18"CMP Riser (Passes < 10.25 cfs potential flow)
3=2"Skimmer (Passes < 0.04 cfs potential flow)
4=10' Secondary Spillway (Weir Controls 10.96 cfs @ 1.91 fps)

Basin #6 Type 11 24-hr 25 yr Rainfall=6.95"
Prepared by E2S
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 6
Summary for Subcatchment IS: Watershed #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& Until led Kv= 10.0 fps
11.6 926 Total

Basin #6 Type 1124-hr 25 yr Rainfall=6.15"
Prepared by E2S
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Pace 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 = 23.58 cfs @ 12.14 hrs, Volume= 2.374 af, Atten=37%, Lag= 6.8 min
Primary = 23.58 cfs @ 12.14 hrs, Volume= 2.374 of
Routing by Stor-Ind method, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Peak Elev=234.64' @ 12.14 hrs Surf.Area= 18,957 sf Storage=43,182 cf
Plug-Flow detention time= 530.6 min calculated for 2.373 of(98% of inflow)
Center-of-Mass det. time= 520.9 min ( 1,290.4-769.4)
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 f
#1 Primary 231.00' 12.0" Round 12"CMP Barrel
L=50.0' CMP, projecting, no headwall, Ke=0.900
Inlet/Outlet Invert=231.00'/230.00' S= 0.0200'/' Cc= 0.900
n=0.025 Corrugated metal, Flow Area= 0.79 sf
#2 Device 1 233.00' 18.0" Horiz. 18"CMP Riser C= 0.600
Limited to weir flow at low heads
#3 Device 1 232.00' 0.038 cfs 2"Skimmer
#4 Primary 234.00' 10'Secondary Spillway, C=3.27
Offset(feet) 0.00 4.50 14.50 19.00
Height(feet) 1.50 0.00 0.00 1.50
Primary OutFlow Max=23.28 cfs @ 12.14 hrs HW=234.63' (Free Discharge)
1=12"CMP Barrel (Barrel Controls 4.33 cfs @ 5.51 fps)
t:2=18" CMP Riser (Passes < 10.87 cfs potential flow)
3=2"Skimmer (Passes< 0.04 cfs potential flow)
4=10' Secondary Spillway (Weir Controls 18.95 cfs @ 2.17 fps)

1 S �` 1 P
Watershed #7 Basin #7
SUbCat Reach on Link Routing Diagram for Basin#7
Prepared by E2S
FHyd,.CADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC

Basin #7 Type 11 24-hr 2 yr Rainfa11=3.55"
Prepared by E2S
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 2
Summary for Subcatchment 1 S: 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) (fUsec) (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 E2S
HydroCADO 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)
1=12"CMP Barrel (Barrel Controls 3.62 cfs @ 4.61 fps)
JL2=18" CMP Riser (Passes < 6.15 cfs potential flow)
3=2"Skimmer (Passes < 0.04 cfs potential flow)
=10' Secondary Spillway ( Controls 0.00 cfs)

Basin #7 Type 1124-hr 10 yr Rainfall=5.17"
Prepared by E2S
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 4
Summary for Subcatchment IS: Watershed #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

Basin #7 Type 1124-hr 10 yr Rainfall=5.17"
Prepared by E2S
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 5
Summary for Pond 1 P: Basin #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 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=6.92 cfs @ 12.15 hrs HW=239.19' (Free Discharge)
1=12"CMP Barrel (Barrel Controls 4.06 cfs @ 5.16 fps)
=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)

Basin #7 Type 1l 24-hr 25 yr Rainfall=6.15"
Prepared by E2S
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 6
Summary for Subcatchment 1 S: 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 & Unti lied Kv= 10.0 fps
8.7 789 Total

Of
Basin #7 Type 1l 24-hr 25 yr Rainfall=6.15"
Prepared by E2S
HydroCAD®10.00-26 s/n 07329 O 2020 HydroCAD Software Solutions LLC Page 7
Summary for Pond 1P: 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'TRouting 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)
106
1=12" CMP Barrel (Barrel Controls 4.17 cfs @ 5.31 fps)
T__1
=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)

1S v 1P
Watershed #8 Basin #8
SUbCat Reach Pon Link Routing Diagram for Basin#8
Prepared by E2S
FHydroCADO t0A0-26 sin 07329 O 2020 HydroCAD Software Solutions LLC

r
Basin #8 Type //24-hr 2 yr Rainfall=3.55"
Prepared by E2S
HydroCADO 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
9.120 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 11 24-hr 2 yr Rainfall=3.55"
Prepared by E2S
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 3
Summary for Pond 1 P: Basin #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)
1=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)

ip •
Basin #8 Type Il 24-hr 10 yr Rainfall=5.17"
Prepared by E2S
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 4
Summary for Subcatchment 1 S: 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
9.120 94 Newly graded area, HSG D
9.120 100.00% Pervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (fUft) (fUsec) (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

R V
Basin #8 Type 11 24-hr 10 yr Rainfall=5.17"
Prepared by E2S
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 5
Summary for Pond 1 P: Basin #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 '/' 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)
Ti=3"
2"CMP Barrel (Barrel Controls 4.20 cfs @ 5.35 fps)
2=18"CMP Riser (Passes< 10.17 cfs potential flow)
Skimmer (Passes < 0.11 cfs potential flow)
4=20' Secondary Spillway (Weir Controls 19.30 cfs @ 1.99 fps)

Basin #8 Type //24-hr 25 yr Rainfall=6.15"
Prepared by E2S
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 6
Summary for Subcatchment IS: 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
9.120 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 1l 24-hr 25 yr Rainfall=6.15"
Prepared by E2S
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 7
Summary for Pond 1 P: Basin #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'/' 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=41.00 cfs @ 12.07 hrs HW=239.65' (Free Discharge)
1=12"CMP Barrel (Barrel Controls 4.34 cfs @ 5.52 fps)
t2=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 Link Routing Diagram for Basin#9
Prepared by E2S
FHyd,,CADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC

. r
Basin #9 Type //24-hr 2 yr Rainfall=3.55"
Prepared by E2S
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 2
Summary for Subcatchment IS: 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

Basin #9 Type 1124-hr 2 yr Rainfall=3.55"
Prepared by E2S
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 3
Summary for Pond 1 P: Basin #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 = 3.77 cfs @ 12.29 hrs, Volume= 1.447 af, Atten= 85%, Lag= 17.8 min
Primary = 3.77 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=240.76' @ 12.29 hrs Surf.Area=21,007 sf Storage= 33,845 cf
Plug-Flow detention time=921.7 min calculated for 1.446 of(100% of inflow)
Center-of-Mass det. time=923.3 min ( 1,706.0-782.7 )
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 171100 0 0
240.00 19,538 18,319 18,319
241.00 21,478 20,508 38,827
242.00 23,498 22,488 61,315
243.00 25,596 24,547 85,862
Device Routing _ Invert Outlet Devices
#1 Primary 238.00' 12.0" Round 12"CMP Barrel
L= 50.0' CMP, projecting, no headwall, Ke= 0.900
Inlet/Outlet Invert=238.00'/237.00' S= 0.0200 '/' Cc= 0.900
n= 0.025 Corrugated metal, Flow Area= 0.79 sf
#2 Device 1 240.00' 18.0" Horiz. 18" CMP Riser C=0.600
Limited to weir flow at low heads
#3 Device 1 239.00' 0.072 cfs 2.5"Skimmer
#4 Primary 241.00' 10'Secondary Spillway, C=3.27
Offset(feet) 0.00 4.50 14.50 19.00
Height(feet) 1.50 0.00 0.00 1.50
Primary OutFlow Max=3.77 cfs @ 12.29 hrs HW=240.76' (Free Discharge)
1=12"CMP Barrel (Barrel Controls 3.77 cfs @ 4.80 fps)
L
2_18"CMP Riser (Passes < 7.40 cfs potential flow)
3 2.5 Skimmer (Passes < 0.07 cfs potential flow)
4=10' Secondary Spillway ( Controls 0.00 cfs)

Basin #9 Type 1124-hr 10 yr Rainfall=5.17"
Prepared by E2S
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 4
Summary for Subcatchment 1 S: 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"
5.5 586 0.0320 1.79 Shallow Concentrated Flow, Shallow Concent.
Nearly Bare & Untilled Kv= 10.0 fps
8.4 686 Total

It r
Basin #9 Type 1124-hr 10 yr Rainfall=5.17"
Prepared by E2S
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 5
Summary for Pond 1 P: Basin #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 = 14.48 cfs @ 12.14 hrs, Volume= 2.245 af, Atten=63%, Lag= 8.9 min
Primary = 14.48 cfs @ 12.14 hrs, Volume= 2.245 of
Routing by Stor-Ind method, Time Span= 0.00-120.00 hrs, dt= 0.05 hrs
Peak Elev= 241.43' @ 12.14 hrs Surf.Area= 22,352 sf Storage=48,553 cf
Plug-Flow detention time=633.3 min calculated for 2.245 of(100% of inflow)
Center-of-Mass det. time=633.1 min ( 1,404.3- 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= 0.0200 '/' Cc= 0.900
n=0.025 Corrugated metal, Flow Area= 0.79 sf
#2 Device 1 240.00' 18.0" Horiz. 18"CMP Riser C=0.600
Limited to weir flow at low heads
#3 Device 1 239.00' 0.072 cfs 2.5"Skimmer
#4 Primary 241.00' 10'Secondary Spillway, C=3.27
Offset(feet) 0.00 4.50 14.50 19.00
Height(feet) 1.50 0.00 0.00 1.50
Primary OutFlow Max=14.33 cfs @ 12.14 hrs HW=241.43' (Free Discharge)
1=12"CMP Barrel (Barrel Controls 4.20 cfs @ 5.35 fps)
t,2_18" CMP Riser (Passes < 10.17 cfs potential flow)
3 2.5 Skimmer (Passes < 0.07 cfs potential flow)
4=10' Secondary Spillway (Weir Controls 10.13 cfs @ 1.88 fps)

Basin #9 Type 1124-hr 25 yr Rainfall=6.15"
Prepared by E2S
HydroCADO 10.00-26 sln 07329 ©2020 HydroCAD Software Solutions LLC Page 6
Summary for Subcatchment IS: 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) (ftlft) (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 //24-hr 25 yr Rainfall=6.?5"
Prepared by E2S
HydroCADO 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 = 25.14 cfs @ 12.10 hrs, Volume= 2.732 af, Atten= 47%, Lag=6.8 min
Primary = 25.14 cfs @ 12.10 hrs, Volume= 2.732 of
Routing by Stor-Ind method, Time Span= 0.00-120.00 hrs, dt=0.05 hrs
Peak Elev=241.67' @ 12.10 hrs Surf.Area= 22,830 sf Storage= 53,879 cf
Plug-Flow detention time= 534.6 min calculated for 2.732 of(100% of inflow)
Center-of-Mass det. time=534.4 min ( 1,300.9-766.5 )
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' 0.072 cfs 2.5"Skimmer
#4 Primary 241.00' 10'Secondary Spillway, C=3.27
Offset(feet) 0.00 4.50 14.50 19.00
Height(feet) 1.50 0.00 0.00 1.50
Primary OutFlow Max=24.93 cfs @ 12.10 hrs HW=241.67' (Free Discharge)
1=12"CMP Barrel (Barrel Controls 4.35 cfs @ 5.53 fps)
I2=18"CMP Riser (Passes < 10.98 cfs potential flow)
2.5 Skimmer (Passes < 0.07 cfs potential flow)
4=10' Secondary Spillway (Weir Controls 20.58 cfs @ 2.21 fps)

1S v 1P
Watershed #10 Basin #10
SubCat Reach on Link Routing Diagram for Basin#10
Prepared by E2S
HydroCAD D 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC

e
Basin #10 Type 1l 24-hr 2 yr Rainfall=3.55"
Prepared by E2S
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 2
Summary for Subcatchment 1 S: 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

r
Basin #10 Type 11 24-hr 2 yr Rainfall=3.55"
Prepared by E2S
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 3
Summary for Pond 1 P: Basin #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)
L2=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)

i +►
Basin #10 Type 1124-hr 10 yr Rainfaii=5.17"
Prepared by E2S
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 4
Summary for Subcatchment IS: 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 II 24-hr 10 yr Rainfall=5.17"
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

Y
Basin #10 Type //24-hr 10 yr Rainfall=5.17"
Prepared by E2S
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 5
Summary for Pond 1 P: Basin #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)
4=10' Secondary Spillway (Weir Controls 4.27 cfs @ 1.50 fps)

Basin #10 Type //24-hr 25 yr Rainfall=6.15►►
Prepared by E2S
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 6
Summary for Subcatchment IS: 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
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 25 yr Rainfall=6.1 5"
Prepared by E2S
HydroCAD®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=508.0 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
Primary OutFlow Max=14.34 cfs @ 12.10 hrs HW=241.43' (Free Discharge)
1=12"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)

1S `` 1P
Watershed #11 Basin #11
SUbCat Reach On Link Routing Diagram for Basin#11
Prepared by E2S
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC

v
Basin #11 Type 1124-hr 2 yr Rainfall=3.55"
Prepared by E2S
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 2
Summary for Subcatchment IS: 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) (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/1 24-hr 2 yr Rainfall=3.55"
Prepared by E2S
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 3
Summary for Pond 1 P: Basin #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
Primary OutFlow Max=3.80 cfs @ 12.40 hrs HW=243.80' (Free Discharge)
=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)
4=20' Secondary Spillway ( Controls 0.00 cfs)

r
Basin #11 Type 11 24-hr 90 yr Rainfall=5.17"
Prepared by E2S
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 4
Summary for Subcatchment IS: 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 11 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) (fUft) (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

F
Basin #11 Type 1l 24-hr 10 yr Rainfall=5.17"
Prepared by E2S
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 5
Summary for Pond 1 P: Basin #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 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=21.42 cfs @ 12.12 hrs HW=244.40' (Free Discharge)
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)
=20' Secondary Spillway (Weir Controls 17.23 cfs, @ 1.93 fps)

r
Basin #11 Type 1l 24-hr 25 yr Rainfall=6.15"
Prepared by E2S
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 6 .
Summary for Subcatchment 1 S: 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

Basin #11 Type //24-hr 25 yr Rainfall=6.15"
Prepared by E2S
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 7
Summary for Pond 1 P: Basin #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)

1 S �` 1 P
Watershed #12 Basin #12
SUbCat Reach on Link Routing Diagram for Basin#12
Prepared by E2S
FHydroCAD(D 10A0-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC

IL a
Basin #12 Type //24-hr 2 yr Rainfall=3.55"
Prepared by E2S
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 2
Summary for Subcatchment 1 S: 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

a
Basin #12 Type/1 24-hr 2 yr Rainfall=3.55"
Prepared by E2S
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 3
Summary for Pond 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
236.00 114,595 111,792 588,736
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 7' Cc= 0.900
n=0.025 Corrugated metal, Flow Area=0.79 sf
#2 Device 1 232.00' 18.0" Horiz. 18"CMP Riser C= 0.600
Limited to weir flow at low heads
#3 Device 1 230.00' 0.230 cfs 4"Skimmer
#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)
1=12"CMP Barrel (Barrel Controls 4.35 cfs @ 5.54 fps)
t2=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)

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Basin #12 Type //24-hr 10 yr Rainfall=5.97"
Prepared by E2S
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 4
Summary for Subcatchment 1 S: 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 11 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

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Basin #12 Type ll 24-hr 90 yr Rainfall=5.1 7"
Prepared by E2S
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 5
Summary for Pond 1 P: 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 '/' 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=31.32 cfs @ 12.41 hrs HW=233.53' (Free Discharge)
=12"CMP Barrel (Barrel Controls 4.83 cfs @ 6.15 fps)
2=18"CMP Riser (Passes< 10.51 cfs potential flow)
3=4"Skimmer (Passes < 0.23 cfs potential flow)
4=20' Secondary Spillway (Weir Controls 26.49 cfs @ 2.18 fps)

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Basin #12 Type 1124-hr 25 yr Rainfall=6.15"
Prepared by E2S
HydroCADO 10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 6
Summary for Subcatchment 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) (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 //24-hr 25 yr Rainfall=6.15"
Prepared by E2S
HydroCAD®10.00-26 s/n 07329 ©2020 HydroCAD Software Solutions LLC Page 7
Summary for Pond 1 P: Basin #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)
1=12"CMP Barrel (Barrel Controls 5.04 cfs @ 6.42 fps)
3�2=18"CMP Riser (Passes < 11.80 cfs potential flow)
=4"Skimmer (Passes < 0.23 cfs potential flow)
4=20'Secondary Spillway (Weir Controls 64.62 cfs @ 2.73 fps)