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processing azeas. Please respond. <br />3. Upon review of the test hole logs and information provided on the existing conditions map that <br />there is an average depth of 2.5 feet of clay overburden over the entire site. In conformance with <br />Rule 6.4.4(d), please clazify the maximum volume of overburden to be stockpiled at any one time <br />throughout the mining and reclamation operation. Please respond. <br />6.4.5 EXHIBIT E -Reclamation Plan <br />4. The- applicant states on page 17 that NCCI will create five (5) ponds during final site <br />reclamation. The lakes will total approximately 67 acres in size. Anticipated used include <br />irrigation water storage and recreational use. Please clazify whether the lakes will be lined or <br />unlined groundwater fed lakes. Please respond. <br />5. The applicant states on page 19, in conformance with Rule 6.4.5(2)(f)(v), that the minimum <br />thickness of topsoil shall be 6 to 12 inches above the surrounding finishing grade. The Division <br />highly recommends a topsoil replacement thickness of 18-24 inches for best success with <br />revegetation . There should be a readily available supply of topsoil for this replacement <br />thickness since a majority of the stripped, disturbed azea will be reclaimed to water surface. <br />Please respond. <br />6. The applicant states on page 21 that the final phase of reclamation will include removal of the <br />processing equipment and that the operator will regrade the area, replace topsoil, and reseed it. <br />Plans for reclamation of the stockpile and plant processing area will need to include ripping to <br />allieve compaction.prior to topsoiling. Itemized costs for ripping will need to be included in the <br />. Reclamation Cost, Exhibit L. Please address. ' <br />6.4.7 EXHIBIT G -Water Information <br />7. The applicant references on page 1 and on page 24 the Meadow Island Ditch No. 1 and the <br />dischazge ditch from the Sand Hill Reservoir. It appears that each ditch may well be within 200 <br />feet of the proposed excavation. Please indicate whether each ditch is lined or unlined. If either <br />or both are unlined, there is potential that dewatering may cause an adverse affect because of the <br />close proximity of groundwater to the surface in the azeas to be dewatered. In the event that <br />either ditch is unlined, please quantify the potential impact to waters in the ditch due to <br />dewatering and describe measures that will be used to mimimize such impact. Please address. <br />8. The applicant states on page 24 that there are 15 wells within 600 feet of the operation, and on <br />page 19 that they are in the process of applying for a well permit and required temporary <br />substitute supply plan to augment evaporative loss from the ponds. In order to demonstrate <br />compliance with Rule 3.1.6(1)(a), please provide a written commitment to obtain all required <br />permits from the Office of the State Engineer and provide documentation of such approved <br />perntits prior to exposure of groundwater at the NCCI Pit No. 1. Attached aze review comments <br />