2022-07-12_PERMIT FILE - C1981019 ‎(24)‎

• Permit No: C1981019
• IBM Index Class Name: Permit File
• Doc Date: 7/12/2022
• Doc Name: Sediment 26 Pond Sediment Control During Mining
• Section_Exhibit Name: Volume 18 Exhibit 7 Item 23 Part C
• Media Type: D
• Archive: No

*No sediment capacity defined
Perforated Riser
Riser
Diameter
(in)
Riser Height
(ft)
Barrel
Diameter
(in)
Barrel
Length (ft)
Barrel Slope
(%)Manning's n Spillway Elev
(ft)
Number of
Holes per
Elev
18.00 7.00 18.00 90.00 2.00 0.0150 7,169.70 2
Pond Results:
Peak Elevation: 7,167.92 ft
H'graph Detention Time: 12.88 hrs
Pond Model: CSTRS
Dewater Time: 1.24 days
Trap Efficiency: 95.20 %
Dewatering time is calculated from peak stage to lowest spillway
Elevation-Capacity-Discharge Table
Elevation Area
(ac)
Capacity
(ac-ft)
Discharge
(cfs)
Dewater
Time
(hrs)
7,155.00 0.000 0.000 0.000 Top of Sed. Storage
7,156.00 0.157 0.052 0.000
7,157.00 0.205 0.233 0.000
7,158.00 0.234 0.452 0.000
7,159.00 0.264 0.701 0.000
7,160.00 0.294 0.979 0.000
7,161.00 0.328 1.290 0.000
7,162.00 0.362 1.635 0.000
7,163.00 0.399 2.016 0.000
7,164.00 0.440 2.435 0.000
7,165.00 0.480 2.895 0.000
7,166.00 0.525 3.397 0.000 Low hole SPW #1
7,167.00 0.572 3.945 0.473 14.04*
7,167.92 0.618 4.496 0.653 15.75 Peak Stage
7,168.00 0.622 4.542 0.669
7,169.00 0.672 5.189 0.819
7,169.70 0.708 5.672 0.909 Spillway #1
7,170.00 0.724 5.887 2.398
7,171.00 0.778 6.638 9.701
7,172.00 0.833 7.443 12.904
7,173.00 0.833 8.276 15.456
7,174.00 0.833 9.108 17.644
Filename: Section 26 10-Year 24-Hour During Mining.sc4 Printed 03-14-2022
SEDCAD 4 for Windows
Copyright 1998 -2010 Pamela J. Schwab
Civil Software Design, LLC 9