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Grand River Park Project, M-2006-046 Response to Adequacy Letter of August 1, 2006 6 September 2006 Page 12 vicinity. The Colorado River and the surrounding valley floor are endowed with a relatively large supply of surface water and ground water. The depth of mining is limited to 25 feet and involves only temporary dewatering. The alluvial aquifer reaches surrounding sites with only limited drawdown potential (see response to item 21 below). Effects on the hydrological balance of the area are largely confined to the site, with limited potential off-site impacts that may be readily mitigated if necessary. As the Division infers in its adequacy comment, the Office of the State Engineer and the Division of Water Resources are the state's administrative authorities for protecting water rights. The applicant has applied, though the land owner, for a TSSP and associated gravel well permit, as of July 13, 2006. The TSSP and well permit will be finalized prior to the exposure of groundwater at the site. The applicant acknowledges that it has reviewed and understands the State Engineer's suggestions; please see the applicant's response to item 27 below for discussion of the enforcement of conditions and permits within the purview of other governmental agencies. The applicant fully intends to comply with all permits and regulations administered by the State Engineer and Division of Water Resources. 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 fhe 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. In 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. It is unclear how the Division's comment presents an adequacy question under Exhibit G. Wetlands mapping is not the subject of Rule 6.4.7(2)(a). The cited Rule specifically pertains to conveyances and other "structures" within the Construction Materials Rules' definition of that term. For the Division's reference, land owner and applicant representatives have met with Mark Gilfillan and other personnel from the U.S. Army Corps of Engineers' Grand Junction office at the project site. The Corps is therefore aware of the