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

5 468.84 6419.49
6 498.26 6425.35
7 527.45 6432.32
8 556.35 6440.36
9 584.93 6449.48
10 613.15 6459.66
11 640.97 6470.88
12 668.35 6483.14
13 695.26 6496.40
14 721.65 6510.67
15 747.49 6525.90
16 772.75 6542.09
17 797.38 6559.22
18 821.36 6577.25
19 844.65 6596.16
20 849.03 6600.00
** Corrected JANBU FOS = 1.992 **
r
(Fo factor = 1.038)
Failure surface No.10 specified by 26 coordinate points
Point x-surf y-surf
No. (ft) (ft)
1 264.05 6367.03
2 293.88 6370.27
3 323.62 6374.18
4 353.27 6378.75
5 382.81 6383.98
6 412.22 6389.88
7 441.50 6396.43
8 470.62 6403.63
9 499.58 6411.49
10 528.35 6419.99
11 556.92 6429.13
12 585.28 6438.90
13 613.42 6449.31
14 641.31 6460.35
15 668.96 6472.01
16 696.33 6484.28
17 723.42 6497.17
18 750.22 6510.65
19 776.71 6524.73
20 802.88 6539.40
21 828.71 6554.66
22 854.20 6570.48
23 879.32 6586.88
24 904.08 6603.83
25 928.44 6621.33
26 930.77 6623.08
** Corrected JANBU FOS = 1.993 ** (Fo factor = 1.031)
The following is a summary of the TEN most critical surfaces