REV06840

• Permit No: C1980007
• IBM Index Class Name: Revision
• Doc Date: 11/30/1995
• Doc Name: FACTOR OF SAFETY SUMMATION FOR THE PARKING LOT EXTENSION AT THE WEST ELK MINE
• From: HARDING LAWSON ASSOCIATES
• To: MTN COAL CO
• Type & Sequence: MR174
• Media Type: D
• Archive: No

1 100.00 109.73
2 107.83 103.51
3 116.85 99.18
4 126.60 96.98
5 136.60 97.00
6 146.34 99.24
7 155.34 103.60
8 163.15 109.86 .
9 169.36 117.69
10 173.68 126.71
11 174.42 130.03
Circle Center At X = 131.5 Y = 141.3 and Radius,
*** 2.452 ***
Failure Surface Specified By 12 Coordinate Points
Point X-Surf Y-Surf
No. (f t) (ft)
1 100.00 109.73
2 107.37 102.97
3 116.03 97.96
4 125.55 94.92
5 135.51 94.00
6 145.43 95.25
7 154.86 98.60
8 163.34 103.90
9 170.48 110.89
10 175.96 119.26
11 179.50 128.61
12 179.77 130.43
Circle Center At X = 134.7 Y = 140.2 and Radius,
* ** 2.481 ***
1
Failure Surface Specified By 10 Coordinate Points
Point X-Surf Y-Surf
No. (ft) (ft)
1 103.33 109.95
2 111.53 104.23
3 120.85 100.61
4 130.77 99.31
5 140.71 100.40
6 150.11 103.82
7 158.42 109.37
44.6
46.2