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~'. big ~r~efl~ end ~ ~irp,V?~t,c.e. ~ R <br />`vUk~I~~~GL~ ~ FcF~ <br />Technical Revision o;~,s CFC ~ , ~Fo <br />~ 1~~ <br />M;n`~; 6 <br />This technical revision is respectfully submitted regarding MLRB 1978-208 Shaffers Cross~uar~a~i - <br />located in Western Jefferson County near Conifer, Colorado. This technical revision is the secondSafeO, °n, <br />submitted under this permit number. <br />A modification to the mining method as submitted to the Jefferson County Planning and Zoning <br />Department and approved October 15, 2005 by the Jefferson County Commissioners calls for a <br />departure from the proposed mine plan submitted as part of the Official Development Plan (ODP) and <br />commenswate Reclamation Plan in the 1978 application. This modification generated the requirement <br />for the technical revision from the Cobrado Division of Reclamation, Mining and Safety (DBMS). <br />In order to optimize the extractable aggregate resowce and minimize the potential for slope failwe a <br />slope stability analysis was conducted of the 9.9 acre permit site and a proposal submitted to mitigate <br />any potential for highwall instability. The revised mine plan together with the reclamation plan was <br />submitted under a revision to the ODP to the County and approved in 2005, Part of this submittal was <br />provided at this time to the Colorado DBMS. <br />Attached is a report prepared in 2005 by Alan Howard which presents a detailed analysis of current <br />Slope Stability conditions and an assessment of the proposed mining method given the current <br />conditions. <br />We trust that this will satisfy the requirements of the technical revision at this time. <br /> <br />N~v= m/-o?ooo-oc~3 <br />/~ >0~3//~~ _ <br />~~-00,6 -oil <br />OAS ~- ~ <br />~ f/!4 / /3~0 /o <br />