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and granitic lithologies predominate. The highly schistose rocks weather to <br />a residuum resembling soil in many characteristics. After denudation and <br />stripping of surficial material and deeply weathered bedrock, the remaining <br />bedrock should be resistant to erosion by running water. No prominent joints <br />or joint sets were observed and no major faults trace through the area. <br />ANTICIPATED SLOPE STABILITY <br />The proposed excavation plan calls for benches to be dropped progressively <br />down from east to west with highwalls up to 4D feet high and a slope ratio <br />of 1/2:1. Bench widths will be 20 to 25 feet. The cut slope stability is <br />expected to be good because the compositional layering and the foliation both <br />dip back into the hillside at fairly steep angles and jointing or faulting is <br />substantially absent. These factors will serve to eliminate planes of <br />weakness along which earth and/or rock material could fall, slide or slump <br />downslope. An existing cut irtmediately east of the graded portion of the site <br />was observed to stand at near vertical angle with little evidence of gravitional <br />movement of earth and rock material. <br />Without the benefit of exploratory test drilling, it can not be guaranteed <br />that the observed lithologies and structures will persist at depth and laterally <br />into the hillside. However, outcrops observed along the western periphery of <br />the site and considerably upslope (east) from the graded portion of the site <br />exhibited similar characteristics to all other outcrops on the property. <br />F. My. ~F~OX &~ASS/~O~CI,ATES~INC. Reviewed b/y~: <br />, ,..a f.~'~STEgF,QG <br />1CZ.~~i'r'c^. ' ,~~c,ve~.^ F' P`.. FLdR ~i',,~ <br />t Q. O ~,IN /li.LCP <br />Paul T. Banks, Jr. mot„ A ,~;~ Bruce A_ Florqui P.E. <br />Geologistn;ol¢412w2~ Vice President <br />PTB:kIz ~-~~o <br />Copies: 3 9ff 0 N <br />F <br />JC 00782 <br />PetersonlElk Creek <br />