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FOS Ranges <_1.00 -100 - -1 20 .-1.20 c=1.40 -1 10 <br /> Nearest <br /> 4150— Offsite — <br /> Ground <br /> 4100 <br /> — <br /> 100-FT SETBACK FROM MINING <br /> 4050— <br /> 4000— <br /> 31350— <br /> 63-FT from Property Line to <br /> Failure Slope <br /> 3900 <br /> 1 1 _L__—_ .. I <br /> 0 50 100 150 200 250 300 350 400 <br /> Figure GS-2. Active Mining Slope <br /> Table GS-2. Factors of Safety for Slope Stability <br /> Slope Condition Lowest Factor of Lowest Factor of Safety Nearest Structure and Distance to <br /> Safety(static) (seismic) Failure Slope <br /> Active Mining 1.50* N/A Property fence,63-ft <br /> 3. Conclusion <br /> The Active Mining condition failure slope at the standard Factor of Safety of 1.50 is 63-ft away <br /> from the nearest offsite ground: a property line fence. This shows that even if there is a failure in <br /> the Active Mining slope, its extents are contained within the setbacks maintained from nearby <br /> offsite ground. <br /> The slope stability analysis in this permit has been prepared according to appropriate <br /> engineering standards and practices. <br /> p.00 Lie NI <br /> ,,'0.20� ,e4/28/25'. <br /> ,-, <br /> Ben Langenfeld, P.E.# 0047151 <br /> Lamar Pit GS-3 Lewicki& Associates <br /> April 2025 <br />