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<br />operation to minimize siltation of the exposed groundwater should be described. <br />6.4.7 EXHIBIT G -Water Information <br />5. In conformance with Rule 6.4.7(3), the applicant will need to clarify the estimated project <br />water requirements including flow rates and annual volumes for the development, mining and <br />reclamation phases of the project. <br />6. In conformance with Rule 6.4.7(4), the applicant will need to clazify the water rights currently <br />held by Mr. Shazkey that will be available [o supply the operational water needs identified in <br />Item 5 above. <br />7. The applicant states in Exhibit G, page [9 that there are 12 water wells on site and that these <br />wells are owned by the surface owners of the proposed operation. The applicant should provide <br />evidence of the ownership of such wells and should also document the location and ownership of <br />any wells located within 600 feet of the permit azea. In the event there are other wells located <br />within 600 feet of the permit area, the applicant is encouraged to provide a map showing the <br />location of all such wells and groundwater users. <br />8. The applicant has stated on page l6 of the Reclamation Plan that the operator does not expect <br />prevailing hydrologic conditions to be disturbed. However, the applicant also states that both <br />wet mining and dry mining/dewatering methods will be used. The extent of each mining method <br />is unknown at this time. Therefore, there is insufficient information at this time to verify that <br />there will be no adverse impacts to surface and groundwater systems in the affected land and <br />surrounding areas both during and after the mining operation and during reclamation. In <br />accordance with Rule 6.4.7(2)(b), the Division requests that the applicant identify and <br />characterize the aquifer to be mined in or through. The Division also requests that the applicant <br />define or predict the cone of depression expected for any areas to be dewatered and dry mined <br />during the life of the operation. The cone of depression assessment should define, at a minimum, <br />the horizontal and vertical extent of drawdown expected. If during the assessment, the applicant <br />determines that a drawdown will occur offsite that may impact a current groundwater user, the <br />applicant should explain any mitigation measures to be implemented. <br />j 9. One of the concerns expressed by an objector is flood control and the potential for offsite <br />impacts related to flooding. Although no such information was provided in the application, it <br />appears that most if not all of the 1239.40 acre site lies within the 100-year floodplain (and <br />possibly within the 10, 25, & 50-year floodplains) of the South Platte River. In the event of a <br />significant flood event (10-year flood or greater) it is likely that the existing pits and/or reclaimed <br />lakes will be captured by the South Platte River. Accordingly, the Division requests that the <br />applicant provide the flood elevation(s) to be expected under a "worst case" flooding scenario <br />and specific mitigation measures that will be implemented to minimize the potential for any <br />offsite impacts. Mitigation measures might include mining dry pit slopes at a maximum of 1:1, <br />installation of flood control spillways within the reclaimed lakes, installation of drainage pipes <br />