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

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Parameter descriptor: XL XR R
Range of variation: 47.60 31.60 25.00
Trial positions within range: 15 15 25
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RESULTS:Analysis 5-Final Mining 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: 1.936
There were:5613 successful analyses from a total of 5625 trial surfaces
12 analyses terminated due to unacceptable geometry
Critical(minimum)Factor of Safety: 1.82
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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 77.30 6480.00 123.40 6458.84 256.41 6809.46 375.00 1.823 <--Critical Surface
2 77.30 6480.00 123.40 6458.84 255.98 6808.51 373.96 1.824
3 77.30 6480.00 123.40 6458.84 255.54 6807.56 372.92 1.824
4 77.30 6480.00 123.40 6458.84 255.11 6806.61 371.88 1.824
5 77.30 6480.00 123.40 6458.84 254.67 6805.66 370.83 1.824
6 77.30 6480.00 123.40 6458.84 254.23 6804.72 369.79 1.825
7 77.30 6480.00 123.40 6458.84 253.80 6803.77 368.75 1.825
8 77.30 6480.00 123.40 6458.84 253.36 6802.82 367.71 1.825
9 77.30 6480.00 123.40 6458.84 252.93 6801.87 366.67 1.825
10 77.30 6480.00 123.40 6458.84 252.49 6800.92 365.62 1.825
11 77.30 6480.00 123.40 6458.84 252.06 6799.97 364.58 1.826
12 77.30 6480.00 123.40 6458.84 251.62 6799.02 363.54 1.826
13 77.30 6480.00 123.40 6458.84 251.19 6798.07 362.50 1.826
14 77.30 6480.00 123.40 6458.84 250.75 6797.12 361.46 1.826
15 77.30 6480.00 123.40 6458.84 250.31 6796.17 360.42 1.827
16 77.30 6480.00 123.40 6458.84 249.88 6795.23 359.38 1.827
17 77.30 6480.00 123.40 6458.84 249.44 6794.28 358.33 1.827
18 77.30 6480.00 123.40 6458.84 249.01 6793.33 357.29 1.827
19 77.30 6480.00 123.40 6458.84 248.57 6792.38 356.25 1.828
20 77.30 6480.00 123.40 6458.84 248.14 6791.43 355.21 1.828
21 77.30 6480.00 123.40 6458.84 247.70 6790.48 354.17 1.828
22 77.30 6480.00 123.40 6458.84 247.27 6789.53 353.12 1.828
23 77.30 6480.00 123.40 6458.84 246.83 6788.58 352.08 1.829
24 77.30 6480.00 123.40 6458.84 246.39 6787.63 351.04 1.829
25 77.30 6480.00 123.40 6458.84 245.96 6786.68 350.00 1.829
26 77.30 6480.00 125.66 6457.74 257.88 6808.66 375.00 1.844
27 77.30 6480.00 125.66 6457.74 257.44 6807.71 373.96 1.844
28 77.30 6480.00 125.66 6457.74 257.00 6806.76 372.92 1.844
29 77.30 6480.00 125.66 6457.74 256.57 6805.81 371.88 1.844
30 77.30 6480.00 125.66 6457.74 256.13 6804.87 370.83 1.845
31 77.30 6480.00 125.66 6457.74 255.69 6803.92 369.79 1.845
Hayden Gravel Pit Lewicki 8f Associates
December 2022