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STATE OF COLORADO <br />DIVISION OF RECLAMATION, MINING AND SAFETY <br />Department of Natural Resources <br />1313 Sherman St., Room 215 <br />Denver, Colorado 80203 C O L O R A D O <br /> <br />Phone: (303) 866-3567 D I V I S I ON OF <br /> <br />FAX: (303) 832-8106 RECLAMATION <br /> MINING <br /> <br /> SAFETY <br />Northfield Mine Bill Ritter, Jr. <br />C-2006-085 Governor <br />Technical Revision 1 James B. Martin <br />17 March 2010 Executive Director <br />JRS <br />Task 075 - Site Maintenance for the Ten-Year Liability Period $8,390.40 <br />A small dozer will be required at various points during the ten-year extended liability <br />period to perform rill and gully maintenance and general site maintenance. The <br />assumption is that a CAT WC dozer will be needed for three days (24 hours) every other <br />year during the liability period (5 years of total dozer work). The cost for a CAT WC <br />dozer is $69.92/hour. <br />($69.92/Hr) x (24 Hours/2 Years) x (10 Years) = $8,390.40 <br />Office of Office of <br />Mined Land Reclamation Denver • Grand Junction • Durango Active and Inactive Mines