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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 <br />Phone: (303) 866-3567 <br />FAX: (303) 832-8106 <br />December 11, 2007 ! <br />DEC 11, 2007 <br />Division of Reclamation, <br />Mining and \ afety <br />COLORADO <br />D I V I S I ON OF <br />RECLAMATION <br />MINING <br />SAFETY <br />Bill Owens <br />Governor <br />Russell George <br />Greg Lewicki Executive Director <br />Greg Lewicki and Associates Ronald W. Cattany <br />11541 Warrington Court Division Director <br />Parker, CO 81501 Natural Resource Trustee <br />/ F- <br />1 <br />Re: Tri-County Gravel, Permit No. M-1977-205, Technical Revision No. 2 Second Adequacy Review <br />Dear Mr. Lewicki: <br />The Division of Reclamation, Mining and Safety (DRMS) received Tri County Gravel's response to our preliminary adequacy <br />review for Technical Revision No. 2 to Permit No. M-1977-205. This revision cannot be approved until the following <br />remaining issues are adequately addressed. Please submit a response to the following issues as soon as possible, but no <br />later than December 18, 2007 so the decision due date set for December 20, 2007 can be met. If your response or a <br />written extension request are not received by December 18, 2007, this application may be denied <br />ADEQUACY COMMENTS <br />1. Response acceptable. <br />2. Response acceptable. Please indicate measures to be taken to keep irrigation water flowing into the current Phase V <br />wetlands to maintain the wetland hydrology. Please contact the Army Corps of Engineers if proposed plans fall <br />within their jurisdiction. <br />3. Response acceptable. <br />4. Response acceptable. <br />5. Response acceptable. <br />6. Response acceptable. <br />7. Please revise the revegetation plan to account for the large wetland area covering the upper end of the pit floor. A <br />diverse seed mix of wetland and riparian vegetation is recommended. <br />8. Please provide the additional construction and sizing specifications for the sediment pond specified below. <br />a. Please provide engineered designs for the sediment pond armored discharge including reclamation plans and <br />costs. <br />b. Please provide details about the pit dewateririg pump system including location of pump in relation to <br />high water level, intake and discharge pipe sizing (or is the pump discharge to the sediment pond via <br />ditch?). <br />c. Please comment on measures to be taken to ensure, in the event of a pump failure, that no equipment or <br />hazardous materials are inundated by rising water in the pit. <br />Office of Office of <br />Mined Land Reclamation Active and Inactive Mines