Laserfiche WebLink
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 40 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 irm~ediately 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. M. FOX & ASSO~CIA~T~ES~, INL. ~ FAO Reviewed,byf: <br />..o ~ 4~ ,ste eo,,G~ /1~ <br />Paul T. Banks, Jr. m 9 144 1 2 W ~ Bruce p. Florqui P.E. <br />Geologist ~ ,o e,: * Vice President <br />PTB:kiz ~' ~~ <br />Copies: 3 9~F Of <br />