HYDRO25125

• Permit No: C1981022
• IBM Index Class Name: Hydrology
• Doc Date: 5/28/1999
• Doc Name: STABILITY EVALUATION TEMPORARY MINE DISCHARGE POND E
• From: MONTGOMERY WATSON MINING GROUP
• To: OXBOW MINING INC
• Permit Index Doc Type: PROF POND CERTIFICATIONS
• Media Type: D
• Archive: No

The most critical circular failure surface
is specified by 29 coordinate points
Point x-surf y-surf
No. (ft) (ft)
1 15.56 6113.01
2 17.49 6112.50
3 19.45 6112.08
4 21.42 6111.73
5 23.40 6111.46
6 25.39 6111.28
7 27.39 6111.17
8 29.39 6111.14
9 31.38 6111.19
10 33.38 6111.32
11 35.37 6111.54
12 37.35 6111.83
13 39.31 6112.20
14 41.26 6112.65
15 43.19 6113.17
16 45.10 6113.78
17 46.98 6114.45
18 48.83 6115.21
19 50.65 6116.04
20 52.44 6116.94
21 54.19 6117.91
22 55.90 6118.95
23 57.56 6120.05
24 59.18 6121.23
25 60.75 6122.46
26 62.27 6123.76
27 63.74 6125.12
28 65.15 6126.54
29 66.49 6128.00
**** Simplified BISHOP FOS = 1.397 ****
The following is a summary of the TEN most critical surfaces
Problem Description OXBOW E POND
FOS Circle Center Radius Initial Terminal Resisting
(BISHOP) x-coord y-coord x-coord x-coord Moment
(ft) (ft) (ft) (ft) (ft) (ft-lb)
1. 1.397 29.06 6160.95 49.81 15.56 66.49 4.913E+OS
2. 1.428 26.52 6182.19 68.25 23.33 67.89 4.067E+OS
3. 1.468 42.27 6141.39 25.86 35.00 64.35 1.473E+OS
4. 1.492 29.46 6170.15 60.33 11.67 72.61 9.429E+OS
5. 1.525 20.62 6204.90 92.83 11.67 72.61 9.220E+OS
6. 1.534 8.72 6223.58 112.18 3.89 67.46 6.678E+OS