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Rule 6.4.5 Exhibit E -Reclamation Plan Rule 6.4.5 (1)(a) requires a discussion of why the proposed type(s) of reclamation was chosen. Lafarge states that the site will be reclaimed to rangeland and developed water. As the current land use is primarily irrigated agricultural, DRMS is reviewing whether this proposed usage will constitute appropriate beneficial post-mine use of the land. 2. Rule 6.4.5(2) (d) & (f)(v) requires a plan for topsoil segregation, preservation, and replacement depths. The applicant commits to removing and stockpiling topsoil and "the amount of topsoil to be stockpiled will be enough to spread over the disturbed areas to a depth of at least 6 inches." DRMS is concerned about the possibility of leaving stockpiled topsoil after mining. The applicant states that 270 acres of the mined area will be converted to water storage. The topsoil removed from that acreage pre-mine should be re-spread over disturbed azeas in the mined azea that aze not converted to water storage. Please provide assurance that all topsoil removed and stockpiled will be re-used so that no post-mine topsoil stockpiles remain on site, even if it results in post-mine topsoil depths exceeding pre-mine depths. Rule 6.4.7 Exhibit G -Water Information The applicant states that they aze undertaking detailed study of potential impacts to azea wells and the hydrologic balance in general. DRMS is unable to approve the application until the study is complete, specifically addressing the following: Please identify all anticipated impacts to the surrounding hydrologic balance (including possible damage to mature trees) with particular emphasis on surrounding water users, and identify mitigation measures that may be employed as the result of those potential impacts. The assessment should include impacts to both water quality and water quantity for both surface water and ground water. This may include, but not be limited to, groundwater modeling using actual transmissitivity numbers from the Fountain Creek alluvial aquifer along with strategically placed monitoring wells to verify those anticipated impacts. Furthermore and more importantly, what verifiable mitigation will be employed if hydrologic impacts aze observed? Rule 6.4.19 Exhibit S -Permanent Man-Made Structures Exhibit C-1: Pre-Mine Plan Map shows numerous water wells within the proposed permit boundary. Water wells are regazded as a "significant, valuable, and permanent man- made structure" as defined in Rule 6.4.19, therefore, the applicant must address these features in accordance with Rule 6.4.19. Please provide the appropriate information. The applicant is not required to provide this information for properly abandoned wells. Information on well abandonment may be obtained from the State Engineer's office.