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Division of Reclamation, Mining and Safety <br />Colorado Department of Natural Resources <br />OS/01 /08 <br />Page 7 of 9 <br />required to properly prove to the Division that the reclaimed pit has been sealed <br />properly and does not leak, <br />c. The Applicant should be required to disclose all water storage agreements it has <br />entered into with any and all third parties and the source and quality of the water <br />supplies that are to be stored in the reclaimed pit. <br />d. The Plan should expressly require the Applicant to shape and landscape the shore <br />line similar to natural lakes and ponds existing in the area with a significantly <br />sized island for additional aesthetics, <br />e. The soil materials removed to expose the sand and gravel for mining should be <br />stored only along the north edge of the project site, parallel to Colorado Highway <br />392. <br />f. The entire proposed project site should be mapped showing elevation contours of <br />the existing surface land elevations prior to the start of the project in order to <br />establish the baseline elevation contours of the site. <br />g. During mining operations there should be no artificial dams, berms, or similar <br />structures placed in or on the project site, even in the event of threatened flooding, <br />that will decrease the capacity of the existing floodplain through the River West <br />Subdivision. <br />h. Prior to completing the project, the final ground surface elevation of the soil <br />materials placed on the project area, excluding the proposed water storage <br />reservoir, should be identical to the elevations on the project map prepared prior <br />to mining operations. <br />i. A 500 foot buffer strip along the edge of the old river bank, the boundary of the <br />active river channel/floodplain, should not be disturbed or mined for sand and <br />gravel. The 100 feet buffer strip proposed by the Applicant will not provide <br />adequate protection for the fragile wetlands/riparian habitats located in the active <br />river channel /floodplain. <br />The shoreline development of the proposed lake must be calculated by the <br />Applicant prior to start of the project. Shoreline development measures the <br />variability of the shoreline (bays, curves, etc.). The formula is: D(L) = L/2 x <br />sgrt(Pi x A). The ratio, of the lake shoreline length (L) to the circumference of a <br />circle having the same area (A) as the lake, is necessary to make this calculation. <br />This requires using the proposed water storage reservoir area and the proposed <br />length of the new shoreline. <br />