SW6220802_Design Calculations_20230217 (3)

Champs Post Dev.
Bypass Storage
Subcat Reach on Link

Champs Convenience Store- Post Dev. Bypass
Champs - Post Dev. - Bypass storage Type/1 24-hr 1 year Rainfall=2.92"
Prepared by {enter your company name here} Printed 11/5/2022
HydroCADO 10.00-18 s/n 05976 cO 2016 HydroCAD Software Solutions LLC -_- -_ Page 2
Summary for Subcatchment IS: Champs Post Dev. Bypass Storage
Runoff = 0.50 cfs @ 12.37 hrs, Volume= 0.061 af, Depths 0.47"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs
Type If 24-hr 1 year Rainfall=2.92"
Area (ac) CN Description
1.320
61 >75% Grass cover, Good, HSG B
0.250
98 Paved parking, HSG B
1.570
67 Weighted Average
1.320
84.08% Pervious Area
0.250
15.92% Impervious Area
Tc Length Slope Velocity Capacity Description
min feet ft/ft) (ftlsec) (cfs
35.0 Direct Entry,
0.3
3
0.25
0.2
0.15
0.1
0.05
Subcatchment IS: Champs Post Dev. Bypass Storage
Hydrograph
I
Tc
j
i
i I
i
c
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Time (hours)

Champs Convenience Store- Post Dev. Bypass
Champs - Post Dev. - Bypass storage Type li 24-hr 2 year Rainfall=3.53"
Prepared by (enter your company name here} Printed 11I512022
HydroCAD010.00-18 sln 05976 02016 HydroCAD Software Solutions LLC Page 3
Summary for Subcatchment 1S: Champs Post Dev, Bypass Storage
Runoff = 0.90 cfs @ 12.35 hrs, Volume= 0.099 af, Depths 0.76"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs
Type it 24-hr 2 year Rainfall=3.53"
Area (ac) CN Description
1.320
61 >75% Grass cover, Good, HSG B
0.250
98 Paved parking, HSG B
1.570
67 Weighted Average
1.320
84.08% Pervious Area
0.250
15.92% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) ft/ft) (ft/sec) (cfs)
35.0 Direct Entry,
Subcatchment 1S: Champs Post Dev. Bypass Storage
Hydrograph
-77 ------ ----- !!7777
1 ' ❑Runoff
0.90 cfs
Type 11 24-h r
2 year Rainfall3.53"
Runoff Area=1.570 ac
j Runoff Volume=0.099. of
Runoff Depth>0.76'"
Tc=35.0 min
CN=67
s S 7 a 9 10 11 12 13 14 1s 16 17 18 19 20
Time (hours)

Champs Convenience Store- Post Dev. Bypass
Champs - Post Dev. - Bypass storage Type // 24-hr 10 year Rainfall=5.18"
Prepared by {enter your company name here} Printed 11/5/2022
H droCAD®10.00-18 s/n 05976 02016 H droCAD Software Solutions LL.0 Page 4
Summary for Subcatchment 1 S: Champs Post Dev. Bypass Storage
Runoff = 2.26 cfs @ 12.32 hrs, Volume= 0.226 af, Depth> 1.73"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs
Type II 24-hr 10 year Rainfall=5.18"
Area (ac) CN Description
1.320
61 >75% Grass cover, Good, HSG B
0.250
98 Paved parking, HSG B
1.570
67 Weighted Average
1.320
84.08% Pervious Area
0.250
15.92% Impervious Area
Tc Length Slope Velocity Capacity Description
min feet ft/ft ft/sec cfs
35.0 Direct Entry,
Subcatchment' IS: Champs Post Dev. Bypass Storage
Hydrograph
', ❑Runoff
2 26 die
L Type II 24-hr
2- 10 year Rainfall=5.18"
Runoff Area=1.570 ac
Runoff Volume=0.226 of
Runoff Depth>1.73"
- - ,---_------.-.- Tc=35.0 min
1- CN=67
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Time (hours)

Champs Convenience Store- Post Dev, Bypass
Champs - Post Dev. - Bypass storage Type 1l 24-hr 25 year Rainfall=6.18"
Prepared by tenter your company name here} Printed 11/5/2022
HydroCAD@ 10,00-18 s/n 05976 02016 HydroCAD Software Solutions LLC Page 5
Summary for Subcatchment 1 S: Champs Post Dev. Bypass Storage
Runoff — 3.20 cfs @ 12.32 hrs, Volume= 0.315 af, Depth> 2.41"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs
Type 11 24-hr 25 year Rainfall=6.18"
Area (ac) CN Description
1.320 61 >75% Grass cover, Good, HSG B
0.250 98 Paved parking, HSG B
1.570 67 Weighted Average
1.320 84.08% Pervious Area
0.250 15.92% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (ft/sec) (cfs)
35.0 Direct Entry,
Subcatchment 1S: Champs Post Dev. Bypass Storage
Hydrograph
_ I I C] Runaff
3,2o cfs
Type 11 24-hr
3-
25 year Rainfall=6.1'8"
Runoff Area=1.570 ac
Runoff Volume=0.315I of
2-
Runoff Depth:�-2.41 "�
LL Tc=350 min
CN=67
I
0-
5 6 7 .8 9 10 11 12 13 14 15 16 17 18 19 20
Time (hours)

Champs Convenience Store- Post Dev. Bypass
Champs - Post Dev. - Bypass storage Type 1124-hr 100 year Rainfall=7.89"
Prepared by {enter your company name here} Printed 1115/2022
HydroCAD®10.00-18 s/n 05976 02016 HydroCAD Software Solutions LLC Page 6
Summary for Subcatchment IS: Champs Post Dev. Bypass Storage
Runoff - 4.83 cfs @ 12.31 hrs, Volume= 0.473 af, Depth> 3.61"
Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5,00-20.00 hrs, dt= 0.05 hrs
Type II 24-hr 100 year Rainfall=7.81"
Area (ac) CN Description
1.320 61 >75% Grass cover, Good, HSG B
0.250 98 Paved parking, HSG B
1.570 67 Weighted Average
1.320 84.08% Pervious Area
0.250 15.92% Impervious Area
Tc Length Slope Velocity Capacity Description
(min) (feet) (ft/ft) (fi/sec) (cfs)
35.0 Direct Entry,
0
Subcatchment 1S: Champs Post Dev. Bypass Storage
Hydrograph
4.&3 cts
Type III 24-h r
100 year Rain.fall=7.81"
Runoff Area=1.570 ac
Runoff Volume=0.473 of
Runoff Depth>3.61"
Tc=35.0 min
CN=67
I
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Time (hours)