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 2-Active Highwall Slope Stability
Bishop Simplified Method of Analysis-Circular Failure Surface
---------------------------------------------------------------
Critical Failure Surface Search using Multiple Circle Generation Techniques
Factor of Safety for initial failure surface approximation: 0.659
There were:2909 successful analyses from a total of 6251 trial surfaces
3342 analyses terminated due to unacceptable geometry
Critical(minimum)Factor of Safety: 0.66
------------------------------------------
Results Summary-Lowest 99 Factor of Safety circles
----------------------------------------------------
Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS
1 80.10 6480.00 101.90 6442.95 218.95 6536.76 150.00 0.659 <--Critical Surface
2 70.69 6480.00 101.01 6460.28 172.74 6603.77 160.42 1.576
3 70.69 6480.00 101.01 6460.28 172.17 6602.89 159.38 1.577
4 70.69 6480.00 101.01 6460.28 171.59 6602.01 158.33 1.578
5 70.69 6480.00 101.01 6460.28 171.02 6601.13 157.29 1.579
6 70.69 6480.00 101.01 6460.28 170.45 6600.26 156.25 1.580
7 70.69 6480.00 101.01 6460.28 169.88 6599.38 155.21 1.581
8 70.69 6480.00 101.01 6460.28 169.31 6598.50 154.17 1.583
9 70.69 6480.00 101.01 6460.28 168.74 6597.62 153.12 1.584
10 70.69 6480.00 101.01 6460.28 168.16 6596.74 152.08 1.585
11 70.69 6480.00 101.01 6460.28 167.59 6595.86 151.04 1.586
12 70.69 6480.00 101.01 6460.28 167.02 6594.98 150.00 1.587
13 70.69 6480.00 101.01 6460.28 166.45 6594.10 148.96 1.589
14 70.69 6480.00 101.01 6460.28 165.88 6593.22 147.92 1.590
15 70.69 6480.00 101.01 6460.28 165.30 6592.34 146.88 1.591
16 70.69 6480.00 101.01 6460.28 164.73 6591.46 145.83 1.593
17 70.69 6480.00 101.01 6460.28 164.16 6590.58 144.79 1.594
18 70.69 6480.00 101.01 6460.28 163.59 6589.70 143.75 1.595
19 70.69 6480.00 101.01 6460.28 163.01 6588.82 142.71 1.597
20 70.69 6480.00 101.01 6460.28 162.44 6587.94 141.67 1.598
21 70.69 6480.00 101.01 6460.28 161.87 6587.06 140.62 1.599
22 70.69 6480.00 101.01 6460.28 161.30 6586.18 139.58 1.601
23 70.69 6480.00 101.01 6460.28 160.72 6585.30 138.54 1.602
24 70.69 6480.00 101.01 6460.28 160.15 6584.42 137.50 1.604
25 69.64 6480.00 101.01 6460.28 171.24 6606.83 162.50 1.635
26 69.64 6480.00 101.01 6460.28 170.68 6605.94 161.46 1.636
27 69.64 6480.00 101.01 6460.28 170.12 6605.05 160.42 1.637
28 69.64 6480.00 101.01 6460.28 169.56 6604.16 159.38 1.638
29 69.64 6480.00 101.01 6460.28 169.00 6603.27 158.33 1.639
30 69.64 6480.00 101.01 6460.28 168.45 6602.39 157.29 1.640
31 69.64 6480.00 101.01 6460.28 167.89 6601.50 156.25 1.642
32 69.64 6480.00 101.01 6460.28 167.33 6600.61 155.21 1.643
33 69.64 6480.00 101.01 6460.28 166.77 6599.72 154.17 1.644
34 69.64 6480.00 101.01 6460.28 166.21 6598.83 153.12 1.645
35 69.64 6480.00 101.01 6460.28 165.65 6597.94 152.08 1.647
36 69.64 6480.00 101.01 6460.28 165.10 6597.06 151.04 1.648
Hayden Gravel Pit Q Lewicki 81 Associates
December 2022