2001-12-11_PERMIT FILE - C1996084 ‎(5)‎

• Permit No: C1996084
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: Exhibit 15-22 Mine Area P6 Sediment Control Pond 6-1
• Media Type: D
• Archive: No

SEDCAD 4 for Windows
Copyright 1998 Pamela J. Schwab
Civil Software Design
•
Riser Riser Height Barrel Barrel Barrel Slope Number of
'
Diameter (f[) Diameter Length (k) (%) Manning
s n Spillway Elev Holes per
(in) (in) . - Elev
18.00 8.00 ~ 14.00 100.00 3.00 0.0240 6,739.00 4
~ V L~
Emergenc~Soillway
Spillway Elev Crest Leng[h Lek Right Bottom
(k) Sideslape Sideslope Width (k)
6,740.00 14.00 2.50:1 2.50:1 6.00
Pond Results:
Peak Elevation: 6,739.70
H'graph Detention Tme: 9.06 hrs
Pond Model: CSTRS
Dewater Tme: 3.36 days
Trap Efficiency: 85.77
Dewatering time is calculated from peak stage to lowest spillway
Elevation-Caoacit~Discharge Table
•

Elevation Area

(ac) Capacity

(ark) Discharge

(~s) Dewater
Tme
(hrs)
6,735.55 0.882 0.000 0.000 Top of Sed. Storage
6,736.00 0.890 0.399 0.000 Low hole SPW #1
6,736.50 0.898 0.846 0.167 32.36'
6,737.00 0.907 1.298 0.403 13.53•
6,737.50 0.916 1.753 0.693 7.96"
6,738.00 0.924 2.213 1.027 6.55
6,738.50 0.933 2.678 1.234 5.00
6,739.00 0.942 3.147 1.407 4.35 Spillway #1
6,739.50 0.951 3.620 5.165 9.15
6,739.70 0.955 3.810 6.494 1.75 Peak Stage
6,740.00 0.960 4.098 8.509 Spillway #2
6,740.50 0.960 4.578 10.284
6,741.00 0.960 5.058 27.520
6,741.50 0.960 5.536 50.383
6,742.00 0.960 6.018 82.123
*Designates time(s) to dewater have been extrapolated beyond the 50 hour hydrograph limit.
• Detailed Discharge Table
Filename: pond6-l.sc4 Printed 04-23-2001