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BRIERLEY <br />ASSOCIATES <br />Creating Space Underground <br />Project: Rigden Reservoir and Port of Entry Pit <br />Slope Stability Analysis: Long -Term Steady State (Drained) <br />Critical Cross Section Location: 1- 25 /CDOT Right -of -Way <br />Method: Spencer <br />Material Properties <br />Unit Weight <br />pcf ) <br />Effective Cohesion <br />(psf) <br />Effective Phi <br />(degrees <br />Fine Alluvium <br />112 <br />100 <br />28 <br />Coarse Alluvium <br />130 <br />0 <br />35 <br />Compacted Clay/ <br />Overburden Mix <br />125 <br />47.5 <br />34 <br />Weathered Cla stone <br />124 <br />0 <br />14 <br />Claystone <br />124 <br />500 <br />22 <br />QJ <br />O <br />x <br />C <br />O <br />UJ <br />w <br />U � / <br />