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

Point X-Surf
No. (ft)
1 93.33
2 102.79
3 112.49
4 122.36
5 132.33
6 142.33
7 152.29
8 162.13
9 171.80
10 181.21
11 190.31
12 199.02
13 207.29
14 215.06
15 222.27
16 228.87
17 234.82
18 237.42
Circle Center At X
*** 1.314
Y-Surf
(f t)
110.00
106.75
104.31
102.70
101.93
101.99
102.90
104.65
107.21
110.59
114.74
119.64
125.27
131.56
138.49
146.01
154.05
158.28
136.5 Y = 220.5 and Radius, 118.6
***
Failure Surface Specified By 18 Coordinate Points
Point X-Surf Y-Surf
No. (ft) (ft)
1 100.00 110.00
2 109.69 107.53
3 119.54 105.79
4 129.49 104.76
5 139.46 104.47
6 149.47 104.92
7 159.40 106.09
8 169.22 107.99
9 178.87 110.61
10 188.31 113.92
11 197.47 117.92
12 206.32 122.58
13 214.80 127.88
14 222.87 133.78
15 230.49 140.26
16 237.61 147.28
17 244.20 154.81
18 248.73 160.82
Circle Center At X = 138.4 Y = 240.8 and Radius, 136.3
*** 1.322 ***