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
L_J
Riser
Riser
eight Barrel
lope
Ba
el
Barre Number of
'
ft
Diameter
( ft
~h
l
Diameter Le
°
( ) ( ) Manning
s n Spillway Elev Holes per
(in) (in) 9 Elev
18.00 8.00 14.00 100.00 3.00 0.0240 6,739.00 4
Emergency Spillway
Spillway Elev Crest Length Left Right Bottom
(ft) Sideslope Sideslope Width (ft)
6,740.00 18.00 2.50:1 2.50:1 60.00
Pond Results:
Peak Elevation: 6,740.75
H'graph Detention Time: 5.22 hrs
Pond Model: CSTRS
Dewater Tme: 3.44 days
Trap Efficiency: 80.25
Dewate~ing time is calculated from peak stage to lowest spillway
Elevation-Capacity-Discharge Table

•

Elevation Area

(ac) Capacity

(ac-tt) Discharge

(~s) Dewater
Time
(hrs)
6,732.96 0.838 0.000 0.000 Top of Sed. Storage
6,733.00 0.839 0.030 0.000
6,733.50 0.897 0.452 0.000
6,734.00 0.855 0.677 0.000
6,734.50 0.864 1.307 0.000
6,735.00 0.872 1.741 0.000
6,735.50 0.881 2.180 0.000
6,736.00 0.890 2.622 0.000 Low hole SPW #1
6,736.50 0.898 3.069 0.167 32.36*
6,737.00 0.907 3.521 0.403 13.53`
6,737.50 0.916 3.976 0.693 7.96`
6,738.00 0.924 4.436 1.027 6.55
6,738.50 0.933 4.901 1.234 5.00
6,739.00 0.942 5.370 1.407 4.30 Spillway #1
6,739.50 0.951 5.843 5.165 7.20
6,740.00 0.960 6.321 8.509 3.35 Spillway u2
6,740.50 0.960 6.801 20.171 1.85
6,740.75 0.960 7.044 87.477 0.50 Peak Stage
6,741.00 0.960 7.281 153.157
~~n~"`~
b `G
Filename: 100pond6-1.sc4 Printed 04-24-2001