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1 <br />1 <br /> <br />1 <br />1 <br />1 <br />1 <br /> <br />1 <br />1 <br />1 <br />1 <br /> <br />1 <br /> <br />1 <br />1 <br />1 <br />unit weight, noted in the data review and evaluation section of <br />this report indicate that the original strength values are <br />conservative. The average, in-place (wet) unit weight of 99.47 <br />pcf, addressed previously, is used in the present analysis for <br />refuse material. The effective friction angle of 36 degrees and <br />effective cohesion of 200 psf cited for the alluvial material in <br />the "Stability Evaluation" report were presumptive values. <br />Without the benefit of existing information on the characteristics <br />of the alluvial material or of specific test results to confirm the <br />assumptions, these values were applied to zone 2 material in the <br />present analysis, as well as a unit weight for the alluvium of 130 <br />pcf. The strength and unit weight values cited in the design <br />report for bedrock, seem reasonable. Since the shear surfaces do <br />not penetrate the bedrock, its strength has no impact on stability <br />and the previously assumed values have, thus, been adopted in the <br />present analysis for zone 3 material, without further comment. The <br />following table summarizes material properties used in the present <br />stability analysis: <br />MATERIAL PROPERTY SUMMARY <br />Material Zone Effective <br />Type Friction <br />Angle (°) <br />Refuse 1 32.12 <br />Alluvium 2 36.00 <br />Bedrock 3 38.00 <br />Pond 4 0.00 <br />9 <br />Effective Unit <br />Cohesion weight <br />(psf) (pcf) <br />204.5 99.47 <br />200.0 130.00 <br />1,000.0 150.00 <br />0.0 62.4 <br />1 <br />