2022-12-22_REVISION - M1987164 ‎(19)‎

• Permit No: M1987164
• IBM Index Class Name: Revision
• Doc Date: 12/22/2022
• Doc Name Note: Geotechnical Stability Exhibit
• Doc Name: Request For Amendment To Permit
• From: Oldcastle SW Group, Inc. dba United Companies
• To: DRMS
• Type & Sequence: AM4
• Email Name: HR1
• Email Name: MAC
• Email Name: AWA
• Media Type: D
• Archive: No

RESULTS:Analysis 1-Active Highwall Slope Stability
Bishop Simplified Method of Analysis-Circular Failure Surface
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Critical Failure Surface Search using Multiple Circle Generation Techniques
Factor of Safety for initial failure surface approximation: 1.389
There were:3126 successful analyses from a total of 6251 trial surfaces
3125 analyses terminated due to unacceptable geometry
Critical(minimum)Factor of Safety: 1.39
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Results Summary-Lowest 99 Factor of Safety circles
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Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS
1 55.00 6480.00 102.10 6441.00 172.21 6573.61 150.00 1.389 <--Critical Surface
2 67.55 6480.00 101.21 6456.38 176.96 6600.15 162.50 1.504
3 67.55 6480.00 101.21 6456.38 176.36 6599.29 161.46 1.505
4 67.55 6480.00 101.21 6456.38 175.75 6598.43 160.42 1.506
5 67.55 6480.00 101.21 6456.38 175.15 6597.57 159.38 1.507
6 67.55 6480.00 101.21 6456.38 174.55 6596.71 158.33 1.508
7 67.55 6480.00 101.21 6456.38 173.94 6595.85 157.29 1.509
8 67.55 6480.00 101.21 6456.38 173.34 6594.99 156.25 1.511
9 67.55 6480.00 101.21 6456.38 172.74 6594.13 155.21 1.512
10 67.55 6480.00 101.21 6456.38 172.13 6593.27 154.17 1.513
11 67.55 6480.00 101.21 6456.38 171.53 6592.41 153.12 1.514
12 67.55 6480.00 101.21 6456.38 170.93 6591.55 152.08 1.515
13 67.55 6480.00 101.21 6456.38 170.32 6590.69 151.04 1.517
14 67.55 6480.00 101.21 6456.38 169.72 6589.83 150.00 1.518
15 67.55 6480.00 101.21 6456.38 169.11 6588.96 148.96 1.519
16 67.55 6480.00 101.21 6456.38 168.51 6588.10 147.92 1.521
17 67.55 6480.00 101.21 6456.38 167.91 6587.24 146.88 1.522
18 67.55 6480.00 101.21 6456.38 167.30 6586.38 145.83 1.523
19 67.55 6480.00 101.21 6456.38 166.70 6585.52 144.79 1.525
20 67.55 6480.00 101.21 6456.38 166.09 6584.66 143.75 1.526
21 67.55 6480.00 101.21 6456.38 165.49 6583.80 142.71 1.528
22 67.55 6480.00 101.21 6456.38 164.88 6582.93 141.67 1.529
23 67.55 6480.00 101.21 6456.38 164.28 6582.07 140.62 1.531
24 67.55 6480.00 101.21 6456.38 163.67 6581.21 139.58 1.532
25 67.55 6480.00 101.21 6456.38 163.07 6580.35 138.54 1.534
26 67.55 6480.00 101.21 6456.38 162.46 6579.49 137.50 1.535
27 66.50 6480.00 101.21 6456.38 174.51 6601.41 162.50 1.556
28 66.50 6480.00 101.21 6456.38 173.92 6600.54 161.46 1.557
29 66.50 6480.00 101.21 6456.38 173.33 6599.68 160.42 1.558
30 66.50 6480.00 101.21 6456.38 172.74 6598.81 159.38 1.559
31 66.50 6480.00 101.21 6456.38 172.15 6597.94 158.33 1.561
32 66.50 6480.00 101.21 6456.38 171.55 6597.07 157.29 1.562
33 66.50 6480.00 101.21 6456.38 170.96 6596.20 156.25 1.563
34 66.50 6480.00 101.21 6456.38 170.37 6595.33 155.21 1.564
35 66.50 6480.00 101.21 6456.38 169.78 6594.46 154.17 1.566
36 66.50 6480.00 101.21 6456.38 169.19 6593.59 153.12 1.567
37 66.50 6480.00 101.21 6456.38 168.60 6592.72 152.08 1.568
Hayden Gravel Pit Q Lewicki&Associates
December 2022