2018-01-31_PERMIT FILE - C1981019A ‎(8)‎

• Permit No: C1981019A
• IBM Index Class Name: Permit File
• Doc Date: 1/31/2018
• Doc Name: West Taylor Sedimentation Pond
• Section_Exhibit Name: Exhibit 07 Item 20 Part C -ST
• Media Type: D
• Archive: Yes

SEDCAD 4 for Windows
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14
Structure #3
Null A bo ve West Taylor Pond
Structure #2 (Eon
West Taylor Pond
Pond Inputs:
Perforated Riser
Riser Riser Height Barrel Barrel Barrel Slope ' Spillway Elev Number of
Diameter (ft) Diameter Length (ft) Mannings n Holes per
(in) (in) Elev
18.00 10.50 18.00 150.00 2.00 0.0150 7,471.00 2
Pond Results:
Peak Elevation: 7,476.52 ft
Dewater Time: 0.74 days
Dewatering time Is calculated from peak stage to lowest spillway
Elevation -Capacity -Discharge Table
Initial Pool Elev:
7,471.00 ft
Discharge Dewater
Elevation
Initial Pool:
2.90 ac -ft
Time
Emergency Spillway
(ac)
Spillway Elev Crest Length Left
Right Bottom
(ft) Sideslope
Sideslope Width (ft)
7,475.80 30.00 2.00:1
2.00:1 30.00
Perforated Riser
Riser Riser Height Barrel Barrel Barrel Slope ' Spillway Elev Number of
Diameter (ft) Diameter Length (ft) Mannings n Holes per
(in) (in) Elev
18.00 10.50 18.00 150.00 2.00 0.0150 7,471.00 2
Pond Results:
Peak Elevation: 7,476.52 ft
Dewater Time: 0.74 days
Dewatering time Is calculated from peak stage to lowest spillway
Elevation -Capacity -Discharge Table
Filename: TR -117 Post Mining 25 YR 24 HR.sc4 Printed 11-10-2017
Area
Capacity
Discharge Dewater
Elevation
Time
(ac)
(ac -ft)
(cfs) (hrs)
7,455.00
0.000
0.000
0.000
7,455.50
0.025
0.004
0.000
7,456.00
0.030
0.018
0.000
7,456.50
0.036
0.034
0.000
7,457.00
0.043
0.054
0.000
7,457.50
0.050
0.077
0.000
7,458.00
0.057
0.104
0.000
7,458.50
0.065
0.135
0.000
7,459.00
0.083
0.171
0.000
7,459.50
0.088
0.214
0.000
7,460.00
0.093
0.259
0.000
Filename: TR -117 Post Mining 25 YR 24 HR.sc4 Printed 11-10-2017