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Ralston Quarry Slope Stability <br /> Retention Ponds and 2017 Slope Failure in Zone 3 and Section 8—B, <br /> Slope stability analyses of this zone of the slope indicated a Morgenstern-Price factor of <br /> safety against failure of less than 1.0, as shown on the SlopeW�' output below, with the <br /> groundwater at the contact between the tailings and the underlying, native soils. <br /> Ralston Quarry <br /> Slope Stability Analysis <br /> eo Section 6-9 <br /> 260 <br /> za <br /> 220 <br /> 20D <br /> y 1e0 <br /> w <br /> g 1f-0 Tailings <br /> Udl Weight=1-5 pcf <br /> u0 Fricllm Angk=35' <br /> Cohesim=100 psf <br /> 0 120 Cdlunum <br /> 1m Und Weght=125 pcf <br /> W Fhctm Angk=22` <br /> Cohesrm=135 psf <br /> s <br /> 60 <br /> Claysime <br /> w UM Weight=t30 pcf <br /> Fnclim Angk=20' <br /> ,ro Cphecim=1.000 psf <br /> g <br /> 0 50 100 150 1. 200 6. <br /> Distance(feet) <br /> Job No. 18-3046 GROUND Engineering Consultants, Inc. Page 16 <br />