2001-12-11_PERMIT FILE - C1996084 ‎(10)‎

• Permit No: C1996084
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: Exhibit 15-16 Mine Area P2 SEDIMENT CONTROL POND 2-2
• Media Type: D
• Archive: No

SEDCAD 4 for Windows
Copyright 1998 Pamela J. Schwab
Civil Software Design

Structure #3 (Pond)
Pond
Pond Inputs:
Structure Detai/;
Initial Pool Elev: 6,645.00
Initial Pool: 10.53 ac-ft
'Sediment Storage: 6.91 ac-ft
Dead Space: 20.00
*Sediment capacity based on Average Annual R of 70. o for 3 year(s)
Emergency Spillway
Spillway Elev Crest Length Left Right Bottom
(ft) Sideslope Sideslope Widt
6,645.00 22.00 2.50:1 2.00:1 25.00
Pond Results:
•
Peak Elevation: 6,646.49
Fi'graph Detention Tme: 1.20 hrs
Pond Model: CSTRS
Dewater Tme: 1.29 days
Trap Efficiency: 74.94
Dewatering time is calculated from peak stage to lowest spillway
Elevation-Capacity-Discharge Table
•

Elevation Area

(ac) Capacity

(ac-ft) Discharge

(~) Dewater
Tme
(hrs)
6,637.29 1.138 0.000 0.000 Top of Sed. Storage
6,637.50 1.150 0.241 0.000
6,638.00 1.178 0.823 0.000
6,638.50 1.206 1.419 0.000
6,639.00 1.235 2.030 0.000
6,639.50 1.264 2.654 0.000
6,640.00 1.293 3.294 0.000
6,640.50 1.323 3.948 0.000
6,641.00 1.353 4.617 0.000
6,641.50 1.384 5.301 0.000
6,642.00 1.414 6.000 0.000
6,642.50 1.445 6.715 0.000
Filename: Pond 2-182.25 yr 1.6'.sc4 Printed 04-17-2001