2014-10-07_PERMIT FILE - C1981018 ‎(2)‎

• Permit No: C1981018
• IBM Index Class Name: Permit File
• Doc Date: 10/7/2014
• Doc Name: B-Seam Dewatering System
• Section_Exhibit Name: Illustration 55
• Media Type: D
• Archive: No

SEDCAD 4 for Windows
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Bottom Left Right Freeboard Freeboard Freeboard Limiting
Width (ft) Sideslope Sideslope Slope ( %) Manning's n Mult. x Velocity
Ratio Ratio Depth (ft) % of Depth (VxD) (fps)
4.00 3.0:1 3.0:1 2.0 0.0200 3.8
Erodible Channel Results:
Structure #4 (Pond
Last Chance Pond
Pond Inputs:
Pond Results:
Initial Pool Elev: 10.00 ft
Initial Pool: 1.20 ac -ft
*Sediment Storage: 0.02 ac -ft
Dead Space: 20.00%
*Sediment capacity based on A verage Annual R of 16.6 for 10 years)
Emergency Spillway
Spillway Elev Crest Length Left Right Bottom
(ft) Sideslope Sideslope Width (ft)
11.00 10.00 3.00:1 3.00:1 2.00
Spillway Elev Crest Length Left Right Bottom
(ft) Sideslope Sideslope Width (ft)
11.00 10.00 3.00:1 3.00:1 2.00
Peak Elevation: 10.73 ft
w/o Freeboard w/ Freeboard
Design Discharge:
0.60 cfs
Depth:
0.08 ft
Top Width:
4.46 ft
Velocity:
1.82 fps
X- Section Area:
0.32 sq ft
Hydraulic Radius:
0.072 ft
Froude Number:
1.19
Initial Pool Elev: 10.00 ft
Initial Pool: 1.20 ac -ft
*Sediment Storage: 0.02 ac -ft
Dead Space: 20.00%
*Sediment capacity based on A verage Annual R of 16.6 for 10 years)
Emergency Spillway
Spillway Elev Crest Length Left Right Bottom
(ft) Sideslope Sideslope Width (ft)
11.00 10.00 3.00:1 3.00:1 2.00
Spillway Elev Crest Length Left Right Bottom
(ft) Sideslope Sideslope Width (ft)
11.00 10.00 3.00:1 3.00:1 2.00
Peak Elevation: 10.73 ft
H'graph Detention Time:
4.01 hrs
Pond Model:
CSTRS
Dewater Time:
1.49 days
Trap Efficiency:
97.65%
Dewater/ng time /s calculated from peak stage to lowest spillway
18
Filename: Dewatering Model - 1 0yr 2014 expansion.sc4 Printed 09 -15 -2014