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

Variable Restraints
-------------------
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 6-Reclaimed 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: 2.431
There were:5563 successful analyses from a total of 5625 trial surfaces
62 analyses terminated due to unacceptable geometry
Critical(minimum)Factor of Safety: 2.03
------------------------------------------
Results Summary-Lowest 99 Factor of Safety circles
----------------------------------------------------
Circle X-Left Y-Left X-Right Y-Right X-Centre Y-Centre Radius FoS
1 80.70 6479.77 107.60 6470.80 216.61 6842.65 387.50 2.026 <--Critical Surface
2 80.70 6479.77 107.60 6470.80 216.28 6841.66 386.46 2.026
3 80.70 6479.77 107.60 6470.80 215.29 6838.70 383.33 2.027
4 80.70 6479.77 107.60 6470.80 215.62 6839.68 384.38 2.027
5 80.70 6479.77 107.60 6470.80 214.96 6837.71 382.29 2.027
6 80.70 6479.77 107.60 6470.80 214.30 6835.73 380.21 2.027
7 80.70 6479.77 107.60 6470.80 213.64 6833.75 378.12 2.027
8 80.70 6479.77 107.60 6470.80 215.95 6840.67 385.42 2.027
9 80.70 6479.77 107.60 6470.80 210.67 6824.85 368.75 2.027
10 80.70 6479.77 107.60 6470.80 211.00 6825.84 369.79 2.027
11 80.70 6479.77 107.60 6470.80 213.31 6832.76 377.08 2.027
12 80.70 6479.77 107.60 6470.80 213.97 6834.74 379.17 2.027
13 80.70 6479.77 107.60 6470.80 211.99 6828.81 372.92 2.027
14 80.70 6479.77 107.60 6470.80 211.66 6827.82 371.88 2.027
15 80.70 6479.77 107.60 6470.80 214.63 6836.72 381.25 2.027
16 80.70 6479.77 107.60 6470.80 211.33 6826.83 370.83 2.027
17 80.70 6479.77 107.60 6470.80 212.32 6829.80 373.96 2.027
18 80.70 6479.77 107.60 6470.80 212.98 6831.77 376.04 2.027
19 80.70 6479.77 107.60 6470.80 210.34 6823.86 367.71 2.027
20 80.70 6479.77 107.60 6470.80 209.69 6821.88 365.62 2.027
21 80.70 6479.77 107.60 6470.80 212.65 6830.78 375.00 2.027
22 84.10 6478.63 107.60 6470.80 217.34 6839.18 384.38 2.027
23 80.70 6479.77 107.60 6470.80 210.02 6822.87 366.67 2.027
24 80.70 6479.77 107.60 6470.80 209.03 6819.91 363.54 2.027
25 84.10 6478.63 107.60 6470.80 217.01 6838.19 383.33 2.027
26 84.10 6478.63 107.60 6470.80 217.67 6840.17 385.42 2.027
27 80.70 6479.77 107.60 6470.80 209.36 6820.90 364.58 2.027
28 80.70 6479.77 107.60 6470.80 208.70 6818.92 362.50 2.027
29 84.10 6478.63 107.60 6470.80 218.00 6841.15 386.46 2.027
Hayden Gravel Pit Q Lewicki&Associates
December 2022