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schemes (RQD,RMR and Q)4,as well as on general rock mass type summaries that were used in the <br /> analyses are also included in Attachment D. <br /> It is important to note that our analyses were based on the rock mass exposures available for viewing in <br /> the quarry during July 2004 and the assumptions detailed in this report. Quarry development should <br /> occur as an observational approach whereby initial observations and assumptions are verified <br /> periodically during final highwall development and if possible,adjustments made in future observations <br /> reveal conditions significantly different than those assumes to begin with. It is recommended that the <br /> operator make and document such periodic observations, either with their own qualified forces,or by <br /> retaining a qualified geotechnical practitioner. Should future exposures reveal differing conditions than <br /> those described herein, Brierley should be provided the opportunity to verify analyses,conclusions and <br /> recommendations at that time. <br /> CONCLUSSIONS AND RECOMMENDATIONS <br /> The following conclusions and recommendations are provided to summarize the discussions included in <br /> this report: <br /> 1. The site is underlain by a thin veneer of hillside colluvium (up to several feet) NOT <br /> ANYMORE which is in turn underlain by metamorphic rocks varying from schist to granitic <br /> gneiss.This gone too <br /> 2: General geologic structure mapped near the quarry includes north to northwesterly striking, <br /> easterly to northeasterly dipping foliation and metamorphic compositional layering <br /> generally parallel to the foliation. Dips are shallow to moderately steeply dipping,and <br /> generally into the hillside at the quarry site.Jhat i�,what it"lo6kedaikel5 years,ago <br /> howeversncexhen we havesubstantial)y rived-throughha botite_rich littology an,d are <br /> approaching-a more com lex intertwind bondary ¢ g ' <br /> etearly�den�if'iable lit�ol io ies— <br /> �e'.a. �— ... r fxe kes Peak and c�aha Spr ngsbasq h%nte ac s ea l eci_& see - abriic <br /> characterizedrtFie#atia-edeial;sta 'to grv,,e waor eleve4 e f._toeriia acompetent <br /> oc s1 dheu � uaima minelizao ialfe P.lies;Peak <br /> 3. Pre-mining slopes at the site were closer to approximately 2:1 than 2.5:1 as reported in the <br /> Fox report:Thosedays'are long gone=we are`approach'ing vertical/sub vertical the cut <br /> slope along the west side of U.S. 285 across the highway from the quarry is approximately <br /> 1:1 overall,and steeper in the lower cut face. It's a lotsteeper than that riow.since CDQT <br /> took a chunk of it—it is over 69 degrees Historic mined and reclaimed slopes by others at <br /> the site are as steep as 1:2 and appear to be generally stable. <br /> 4. There is an upper weathered bedrock zone in which moderately severely weathered to <br /> completely weathered bedrock extends approximately 15 to 20 ft into the rock mass. Not <br /> ab_ymore-I sold it all <br /> 5.- There are no known or suspected sites of special geologic interest(e.g.,fossil beds) at this <br /> site,l=hoe like Hell there aint <br />