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III IIIIIIIIIIIIIIII <br />C c~RUs <br />"~ Orchard Valley <br />Cyprus Orchard Valley Mine <br />P.O. Box 1299 <br />Paonia, CO 81428 <br />Phone: 303-527-4135 <br />Fax: 303-527-2234 <br />April 20, 1992 <br />Mr. Steve S. Shuey ~~`~'~~~~p , <br />Reclamation Specialist ~! <br />215oCentennia~l Buildinglamation Division Ip~ 2 2 X99? <br />1313 Sherman Street fl/]j~ <br />Denver, ~ so2o3 Recjam~eon n a.,;,,n <br />RE: PERI+II'1' N0. C-81-038, TECHNICAL REVISION 92-18, R-O-M COAL S1gClD?ILE HAUL <br />ROAD <br />Dear Mr. Shuey: <br />Cyprus OrcharY3 Valley Coal Corporation (COVCC) is requesting a technical <br />revision to the above referenced permit. The revision will allow for haul <br />road design doclmtentation and reference to be incorporated into the permit for <br />the existing roadway accessing the RAM coal stockpile established by minor <br />revision 66. Minor revision 66 was approved on June 5, 1990. CMLRD review of <br />the subsequent geotechnical assessment of the road, required as a condition of <br />the revised material submitted under minor revision 66 (refer to revised page <br />2.05-47), concluded that the bearing surface of the road was inadequate to <br />car>!y the proposed traffic loads to the coal storage area. <br />The Division has since requested COVCC complete a projection of the <br />anticipated service life of the road, develop plans for new construction <br />upgrading the road to specifications contingent upon the service life <br />definition, and carry out said construction. In response to these requests, <br />COVCC has reevaluated it's projected usage requirements for the stockpile and <br />has retained the services of a geotechnical consultant to develop construction <br />recotmttestdations providing an adequate bearing surface for the projected usage <br />estimate. CgVCC at this time seeks Division approval of the proposed <br />construction design before initiating construction activities. <br />In developing the haul road bearing surface construction recommendations, <br />~VCC instructed it's geotechnical consultant to utilize conservative design <br />assumptions and generate aggregate addition requirements for a range of <br />service life projections. After evaluating the economic impacts of the <br />various aggregate addition recommnendations, COVCC has decided the preferred <br />alternative is upgrading the road to provide a minimum three year service life <br />based upon the design assumptions. Q~VCC believes this approach most <br />economically and practically fulfills the regulatory requirements of the haul <br />road design. <br />