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SUMMIT ENGINEERING CO <br />PROFESSIONAL ENGINEERS AND LAND SURVEYORS <br />P.O. Box 1897 <br />ALAMOSA, COLORADO 81101 <br />(719)589-6147 FAX (719) 589-6633 <br />EMAIL: scott4622@gmail.com <br />February 9, 2010 <br />Mr. Michael A. Cunningham <br />Environmental Protection Specialist <br />Colorado Division of Reclamation, Mining and Safety <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />RE: Robins Rock Pit; DRMS File No. M-2009-053; Response to AR-3 dated February 4,2010 <br />Dear Mr. Cunningham; <br />In response to the above captioned Preliminary Adequacy Review-3 we submit the following: <br />6.3.4 Exhibit D - Reclamation Plan <br />1. The pit will be benched to final grade with a track mounted rock hammer, a 90,000 lb <br />hammer on a Case 9030 track excavator, or equal. The benches will be approximately 8 <br />feet wide and 4 feet deep, overlain with crusher fines, so that the "step" in the bench has <br />at least 6 inches of cover. <br />2. We estimate that approximately 8,000 CY of fine material will need to be moved from the <br />stockpile an average distance of 400 feet with a rubber tired loader to get the material in <br />place for final grading with a tracked dozer. <br />3. We wish to clarify that the mulch will be distributed using a "bale chopper" on an ATV. <br />If you have any questions, please call me. <br />Yours Truly, <br />Scott E. Johnson