REV04523

• Permit No: C1980007
• IBM Index Class Name: Revision
• Doc Date: 11/21/1996
• Doc Name: SYLVESTER GULCH STABILITY ANALYSIS FOR RECLAMATION
• From: GOLDER ASSOCIATES
• To: MOUNTAIN COAL CO
• Type & Sequence: PR7
• Media Type: D
• Archive: No

5 497.05 6431.22
6 526.36 6437.64
7 555.42 6445.10
8 584.19 6453.60
9 612.64 6463.12
10 640.73 6473.66
11 668.42 6485.19
12 695.68 6497.71
13 722.48 6511.20
14 748.78 6525.63
15 774.54 6541.00
16 799.74 6557.29
17 824.34 6574.46
18 848.30 6592.50
19 857.55 6600.00
** Corrected JANBU FOS = 1.984 **
r
(Fo factor = 1.035)
Failure surface No. 6 specified by 24 coordinate points
Point x-surf y-surf
No. (ft) (ft)
1 264.05 6367.03
2 293.82 6370.76
3 323.49 6375.20
4 353.05 6380.32
5 382.48 6386.13
6 411.77 6392.63
7 440.89 6399.81
8 469.85 6407.67
9 498.61 6416.20
10 527.16 6425.40
11 555.49 6435.27
12 583.59 6445.79
13 611.43 6456.97
14 639.00 6468.79
15 666.29 6481.26
16 693.28 6494.36
17 719.95 6508.08
18 746.30 6522.42
19 772.31 6537.38
20 797.96 6552.94
21 823.24 6569.09
22 848.14 6585.83
23 872.63 6603.15
24 887.31 6614.04
** Corrected JANBU FOS = 1.990 ** (Fo factor = 1.030)
Failure surface No. 7 specified by 23 coordinate points
Point x-surf y-surf
No. (ft) (f t)
1 271.18 6370.59
2 300.90 6374.67
3 330.51 6379.47