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

++* 1.524 ***
Failure Surface Specified By 17 Coordinate Points
Point X-Surf
No. (ft)
1 93.33
2 102.64
3 112.23
4 122.03
5 131.96
6 141.96
7 151.94
8 161.84
9 171.57
10 181.07
11 190.26
12 199.07
13 207.44
14 215.31
15 222.62
16 229.30
17 235.32
Circle Center At X
*** 1.525
Y-Surf
(ft)
117.70
114.04
111.21
109.21
108.07
107.79
108.38
109.83
112.13
115.26
119.20
123.93
129.39
135.56
142.39
149.83
157.81
140.2 Y = 223.3
and Radius, 115.5
**•
1
Failure Surface Specified By 20 Coordinate Points
Point X-Surf Y-Surf
No. (ft) (ft)
1 73.33 112.94
2 83.12 110.87
3 93.00 109.34
4 102.95 108.36
5 112.94 107.93
6 122.94 108.04
7 132.92 108.70
8 142.85 109.91
9 152.69 111.66
10 162.43 113.94
11 172.02 116.76
12 181.45 120.10
13 190.68 123.95
14 199.68 128.30
15 208.43 133.14
16 216.90 138.46
17 225.07 144.22
18 232.91 150.43