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

No. (ft) (ft)
1 80.00 114.52
2 89.66 111.95
3 99.48 110.02
4 109.39 108.73
5 119.37 108.11
6 129.37 108.13
7 139.35 108.82
8 149.26 110.16
9 159.06 112.15
10 168.71 114.78
11 178.16 118.04
12 187.38 121.91
13 196.33 126.38
14 204.96 131.42
15 213.24 137.03
16 221.14 143.17
17 228.61 149.81
18 235.63 156.93
19 236.65 158.11
Circle Center At X = 123.9 Y = 260.1 and Radius, 152.0
*** 1.523 ***
1
Failure Surface Specified By 20 Coordinate Points
Point X-Surf
No. (ft)
1 60.00
2 68.73
3 77.87
4 87.34
5 97.06
6 106.96
7 116.94
8 126.94
9 136.85
10 146.61
11 156.12
12 165.31
13 174.10
14 182.43
15 190.21
16 197.38
17 203.89
18 209.68
19 214.70
20 215.08
Circle Center At X
Y-Surf
(ft)
110.00
105.12
101.06
97.85
95.52
94.08
93.56
93.95
95.25
97.45
100.53
104.47
109.23
114.78
121.06
128.03
135.62
143.77
152.42
153.26
117.7 Y 202.9 and Radius, 109.4