2001-12-11_PERMIT FILE - C1996084 ‎(9)‎

• Permit No: C1996084
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: EXHIBIT 15-17 Mine Area P2 SEDIMENT CONTROL POND 2-3
• Media Type: D
• Archive: No

SEDCAD 4 for Windows
Copyngh11998 Pamela J. Schwab
Civil Software Design
•
Structure #6 (Pond1
pond
Pond Inputs:
Structure Detai/;
Initial Pool Elev: 6,620.00
Initial Pool: 1.48 ac-k
"Sediment Storage: 1.51 ac-k
Dead Space: 20.00
*Sediment capacity based on Average Annual R of70.0 for 3 year(s)
Emergency Spillway
Spillway Elev Crest Leng[h Lek Right Bottom
(ft Sideslope Sideslope Width (~ /
6,620.00 24.00 2.50:1 2.50:1 ~- 8.00
Pond Results:
•
Peak Elevation: 6,620.98
H'graph Detention Time: 1.69 hr;
Pond Model: CSTRS
Dewater Time: 1.17 days
Trap EFfciency: 73.62
Dewatering time is calculated from peak stage to lowest spillway
Elevation-Capacity-Discharge Table
•

Elevation Area

(ac) Capacity

(ac-ft) Discharge

(~s) Dewater
Time
(hrs)
6,615.91 0.315 0.000 0.000 Top of Sed. Storage
6,616.00 0.317 0.029 0.000
6,616.50 0.328 0.190 0.000
6,617.00 0.339 0.357 0.000
6,617.50 0.350 0.529 0.000
6,618.00 0.361 0.707 0.000
6,618.50 0.373 0.890 0.000
6,619.00 0.385 1.080 0.000
6,619.50 0.397 1.275 0.000
6,620.00 0.409 1.477 0.000 Spillway #1
6,620.50 0.422 1.685 0.680 23.65
Filename: New 2-3 -26 yr emerrev.sc4 Printed 07-24-2001