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Mr. Tom Schreiner, Division of Minerals and Geology <br />March 23, 2005 <br />Page 3 <br />~~ <br />CIVIL RES~URCES,LLC <br />4. The applicant specifies on page 13 that the claystone bedrock surface is fairly irregular across the <br />site and that the claystone is locally silty and sandy. The applicant also specifies on page 14 that <br />the operator is proposing to create a series of waterstorage reservoirs. Therefore, the potential for <br />leakage into the lined ponds through the bedrock pit floor should be evaluated. Please provide a <br />geologic evaluation of the proposed pit floor(s) that demonstrates that leakage (in excess of the <br />State Engineers Office requirement) will not occur. If a geologic evaluation is not feasible, the <br />applicant should provide a contingency plan for steps to be taken if cracks, fissures, sand lenses, or <br />other undesirable features are encountered. Please respond. <br />During the summer of 2004 Civil Resources, LLC performed a geotechnical analysis with 30 plus borings <br />drilled across the site to a maximum depth 75 feet, approximately 25 feet into bedrock. Locally silty and <br />sandy deposits are typical of this formation over its full extent however no sandy or silty samples were <br />observed in the site bedrock as indicated on the attached borings. Should the excavation expose <br />sandstone lenses, the area would beover-excavated, evaluated for pore pressure by installing well points <br />and recompacted with clay. See the attached borings logs. <br />6.4.5 EXHIBIT E-Reclamation Plan <br />5. The application specifies on page 14 that the operator is proposing to create water storage <br />reservoirs. Incompliance with Rule ti.3.4(1), please describe the number of acres of water surface <br />for each reservoir, the storage capacity (in acre-feet) of each reservoir, and the maximum pool <br />elevation for each reservoir. Also, we request that you specify for each lake the number of feet of <br />bank above the maximum water surface. (If bank configurations other than 3.5:1 are desired, we <br />request that you provide a representative cross section for each reservoir showing the bank <br />configuration, maximum water surface, and number of feet of bank above the maximum water <br />surface). Please respond. <br />The table below presents the water surface area, proposed water storage and normal high water line <br />(NHWL) for each reclaimed water storage lake. <br />Pond Water Sfc Water Sfc Storage Reserwir Vol. of <br /> Elewtion Area Capacity(af) Floor (ac) CCL (cy) <br /> (Iq (acres) 4:1 <br />1 4932 83.9 4,006 46 1,770,000 <br />2 4937.5 165.8 7,501 123 1,883,500 <br /> TOTALS= 250 11,507 169 3,653,500 <br />Being a below grade slope liner, the freeboard will range from 1-foot on the northern margin of both ponds <br />to approximately five-feet on the southern margin. <br />6. The application specifies on page 14 that the applicant will protect the existing and "reasonably <br />potential"future uses of groundwater; and is in the process of applying for a well permit and is <br />preparing a Temporary Substitute Water Supply Plan to augment evaporative losses from the ponds. <br />Please discuss the status of the well permit application and the Temporary Substitute Supply Plan <br />application. <br />The Temporary Substitute Water Supply Plan (TSSP) and well permit application is currently being <br />developed and will be completed in the near future and the applicant is required to have an approved 7SSP <br />