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

*** The above error occurred in attempting ***
*** to generate surface # 23 from the ***
*** initiation point located at x = 188.46 ***
r'
Factors of safety have been calculated by the :_
* * * * * SIMPLIFIED BISHOP METHOD * * * * *
The most critical circular failure surface
is specified by 24 coordinate points
Point x-surf y-surf
No. (ft) (ft)
1 178.21 6318.87
2 201.17 6320.20
3 224.07 6322.29
4 246.89 6325.14
5 269.61 6328.75
6 292.19 6333.10
7 314.62 6338.20
8 336.87 6344.04
9 358.91 6350.62
10 380.72 6357.92
11 402.27 6365.94
12 423.55 6374.67
13 444.53 6384.10
14 465.19 6394.22
15 485.49 6405.02
16 505.43 6416.48
17 524.98 6428.60
18 544.12 6441.36
19 562.82 6454.75
20 581.07 6468.75
21 598.84 6483.34
22 616.12 6498.52
23 632.89 6514.26
24 647.00 6528.41
**** Simplified BISHOP FOS = 1.663 ****
The following is a summary of the TEN most critical surfaces