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Mr. Bill Roberts Adequacy Review, Petntit Application No. M-2006-046 August 1, 2006 Rule 6.4.6 Exhibit F -Reclamation Plan Man 14. Note 4 on the Reclamation Plan Map indicates that the temporary landscape features will be either removed or maintained at the option of the owner. The Division requests that the operator commit to either removing the features or leaving them in place with adequate vegetation established to provide protection from erosion. Please respond. I5. Please clarify if the office building will remain on site after mining is complete. If the office building is to be removed during reclamation please provide its dimensions and composition in order to accurately estimate a cost for removal in the reclamation bond estimate. Also, if the building is to be removed please revise Exhibit F accordingly. 16. The applicant indicates that a pazking lot may be constructed adjacent to the office building. Please to commit to either constructing a parking lot or reclaiming this area. If the operator commits to constructing a pazking lot, please provide the proposed design to include dimensions of the lot and the materials used for its construction. 17. Please describe the access road located in the southwest corner of the permit azea that will remain after reclamation. The description should provide the proposed design and include the dimensions of the road and materials used for its construction. I8. The applicant indicates that a utility line will be relocated to run parallel to the west boundary of the permit area. Please indicate which utility line will be relocated and who is responsible for relocating it. Rule 6.4.7 Exhibit G -Water Information 19. In accordance with Rule 3.1.6(1)(a), please explain how disturbance to the hydrologic balance will be minimized during the mining and reclamation phase of the Grand River Park Project. Please explain how Silt Sand & Gravel will be in compliance with Colorado Water Laws and regulations governing injury to existing water rights. Please inform the Division as to when a Temporary Substitute Supply Plan (TSSP), Well Permit and Plan of Augmentation will be obtained from the Division of Water resources. The Division received comments from the Office of the State Engineer (OSE) regazding the application. The letter is enclosed for your reference. Please acknowledge the conditions for approval noted by the OSE. 20. As required by Rule 6.4.7(2)(a), the applicant has delineated the numerous water related features on and adjacent to the affected land that may be affected by the mining operation. However, during the pre-operational inspection, wetlands appear to occupy a larger percentage of the proposed mining area than that which is shown on the Pre- Mining and Mining Plan Maps. In addition, the applicant states on page eighteen of the application that concurrence of the delineation of wetlands by the U.S. Army Corps of Engineers (COE) is currently being sought and that should the delineation of jurisdictional wetland boundaries change, adjustments to the application exhibits will be submitted to the Division. Please provide an update as to the status of the COE concurrence of the applicant's mapping of jurisdictional wetlands within or adjacent to the affected land. Irt addition, please provide a copy of any written responses received from the COE verifying whether a 404, Nationwide, or other COE permit is needed for any of the applicant's proposed activities. 21. In accordance with Rule 6.4.7(2)(b), the Division requests that the applicant identify and characterize the aquifer to be mined in or through. The Division also requests that the applicant define or predict the cone of depression expected for any areas to be dewatered. The cone of depression and assessment of other effects should define, at a minimum, the horizontal and vertical extent of expected impacts. If during the assessment, the applicant determines that a drawdown effect will occur offsite that may impact a current groundwater user, the applicant should explain any mitigation measures to be implemented and trigger points that would cause mitigation measures to be put into effect. The applicant will also need to establish a baseline for the current groundwater levels through at least five quarters of ground water level measurements.