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Weiland Inc <br />Environmental ff Engineering <br />April 20, 2010 <br />Michael Cunningham <br />Division of Reclamation Mining & Safety <br />1313 Sherman St., Room 215 <br />Denver, CO 80203 <br />Re; Bonser Pit, M-2000-156 - Response to AR-2 Letter dated <br />April 20, 2010. <br />Dear Michael, <br />Environmental Support for, <br />• Transportation <br />• Land Development <br />• Mining <br />• Industry <br />This letter addresses the item listed in your Adequacy Review letter dated April 10, <br />2010. <br />1. The volume of slope protection is equal to 65,113 ftz X 0.67 ft = 43,408.7 ft3 or <br />1,607.7 yd 3. Since we will be using onsite pit run, a cost of $1.75 per yad3 to <br />move and place the material should be sufficient. Exhibit L has been revised to <br />include a line item for the slope protection. <br />Sincerely, <br />FA.., w? d <br />Peter Wayland <br />President <br />Encl . Exhibit L Phase 2 <br />PO BOX 18067. BOULDER CO B0308 <br />ph 303-443-9521 fax 303-443-9536