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~r <br />' II I III III 1111111 III <br /> <br />MOUNTAIN WEST COLORADO AGGREGATE <br />4212 S Hwy 191, Rexburg, ID 83440 <br />Phone: (208) 356-4581 Fax: (208) 356-4251 <br />August 11, 1997 RECEIVED <br />Mr. James C. Stevens <br />Senior Specialist <br />State of Colorado <br />Division of Minerals and Geology <br />Department of Natural Resources <br />1313 Sherman Street, Room 215 <br />Denver, Colorado 80203 <br />Re: Permit No. M-77-227, <br />Reclamation Costs <br />Dear Mr. Stevens: <br />AUG ~ 41997 <br />DIVISiOn O1 Minoraio ~ Cacolop~~ <br />Mesita Hill Pit, Estimate of <br />We have reviewed the cost estimate provided by you fo~~ the <br />Mesita Hill Mine and we believe that you have done a very thorough <br />and professional estimate. We would like you to consider the <br />following comments regarding topsoil replacement and structural <br />demolition: <br />A swell factor of 1.215 has been used to increase the amount <br />of topsoil to be excavated and placed. Because the topsoil will <br />swell when picked up and moved, it will actually take less than <br />22,990 cy to provide a 6 inch depth on the reclaimed surface. For <br />this reason we believe that a swell factor should not be added but <br />would agree to let the amount of topsoil to be moved rema:Ln at <br />22,990 cy. Also, the CAT Handbook indicates an altitude correction <br />factor for 7700 foot elevation of 0.93 fora 950E loader instead of <br />the 0.85 used. Incorporating these two changes would reduc~a the <br />number of equipment hours needed for this task to 112 hour;a and <br />reduce the total cost for this task from $17,888 to $13,488. <br />Structural Demolition <br />We believe the unit rates for the concrete demolition and <br />removal costs would be lower than the Means rate used. We have a <br />cost estimate from a contractor for demolition of the concrete, <br />His estimate is $35,094 which includes mobilization, demobiiization <br />and per diem. A copy of this estimate is enclosed for your review. <br />Use of this cost estimate for the concrete removal reducea~ the <br />estimated cost for structural removal from $87,032 to $38,679. <br />