2001-12-11_PERMIT FILE - C1996084 ‎(4)‎

• Permit No: C1996084
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: EXHIBIT 15-23 MINE AREA P7 SEDIMENT CONTROL POND 7-1
• Media Type: D
• Archive: No

SEDCAD 4 for Windows
Copyright 1999 Pamela J. Schwab
Civil Software Design
•
Structure Detai/;
Structure #4 (PDnd1
south sws, east sws
Pond Inputs:
Initial Pool Elev: 6,695.00
Initial Pool: 7.75 ac-ft
`Sediment Storage: 0.76 ac-ft
Dead Space: 20.00
*Sediment caaacity based on Average Annual R of 70.0 for 1 year(s)
Emergency Spillway
Spillway Elev Crest Length Left Righ[ Bottom
(tt) Sideslope Sideslope Width (ft)
6,695.00 24.00 2.50:1 2.50:1 12.00
Pond Results:
CJ
Peak Elevation: 6,696.46
H'graph Detention Time: 1.44 hrs
Pond Model: CSTRS
Dewater Tme: 0.75 days
Trap Efficiency: 86.66
Dewateiing time is calculated from peak stage to lowest spillway
Elevation-Capacity-Discharge Table
•

Elevation Area

(ac) Capacity

(ac-ft) Discharge Dewater
Time
(~s) (hrs)
6,666.00 0.769 0.000 0.000 Top of Sed. Storage
6,686.00 0.769 0.004 0.000
6,686.50 0.779 0.391 0.000
6,687.00 0.789 0.783 0.000
6,687.50 0.799 1.180 0.000
6,688.00 0.809 1.582 0.000
6,688.50 0.819 1.989 0.000
6,689.00 0.829 2.401 0.000
6,689.50 0.839 2.818 0.000
6,690.00 0.849 3.240 0.000
6,690.50 0.860 3.667 0.000
Filename: 25pontl7-1 rev.srA
Printed 07-25-2001