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1 <br /> SUMMARY OF CONCLUSIONS <br /> 1 1. Subsoils found in five exploratory test pits excavat d in the <br /> embankment area consisted of 1 to 10 feet of man placed fill material <br /> 1 underlain by native soils consisting primarily of gravel and boulders. <br /> The fill consisted of fractured, sandy gravel anJ cobble. <br /> Groundwater was not found in the exploratory test pits to the <br /> ' maximum depths excavated. <br /> 2. Slope stability analysis at the embankment area indicate factors of <br /> 1 safety against movement ranging from 1.4 to 2.1. Additional <br /> discussion is included in the text of the report. <br /> 1 3. The highwall area revealed near vertical to vertical slopes <br /> approximately 110 feet in height and approximately 350 feet <br /> horizontal from Highway 141. The face of the hig iwall was <br /> 1 rubblized. Several large (on the order of 10 foot diamete ) perched <br /> boulder sized pieces were noted near the top of the wall. <br /> Intermediate rubblized material ranged from 1 to 10 feet in Jiameter. <br /> 1 4. Rock roll out analysis of the highwall indicated no rocks impacting <br /> 1 the Highway 141 right of way. Additional discussion is i icluded in <br /> the text of the report. <br /> 1 <br /> 1 PREVIOUS REPORTING <br /> 1 A portion of this investigation included reviewing previou reports <br /> prepared by State of Colorado, Division of Minerals and Geology ( MG) and <br /> 1 J.F.T. Agapito and Associates, Inc. (AAI). We reviewed DMG Jett rs dated <br /> 1 August 23, October 6 and October 11, 2000 and an AAI report dated June 19, <br /> 1987. Following are our understandings from our review: <br /> 1 <br /> 1 <br /> Rhino Engineering,Inc. <br /> 1 Unaweep Quarry <br /> GEG Job No.593 2 <br />