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Grand River Park Project, M-2006-046 Response to Adequacy Letter of August 1, 2006 6 September 2006 Page 2 2. In accordance with this rule, maps, with the exception of the index map, must be prepared signed by a registered surveyor, professional engineer, or other qualified person. Please resubmit signed copies of the Pre- Mining Plan Map, Mining Plan Map, and Reclamation Plan Map. As previously discussed with the DMG, signatures were inadvertently omitted from the initial submittal of map exhibits. In accordance with Rule 6.2.1(2)(b), Exhibits C-1 and C-2 and F have been prepared and signed by a qualified professional, as reflected on the revised plans enclosed for DMG review. 3. In accordance with Rule 6.4.3(a), please identify the adjoining surface owners of record along the northwest permit boundary. All land surface owners are properly identified on Exhibit C-1, as revised. For the record, the right-of-way for Interstate 70 along the northwest permit boundary was conveyed to CDOT in several stages. The instruments accomplishing this conveyance were not available at the time of initial submittal, so the lack of a tax parcel record for the right-of-way created some uncertainty as to the ownership status of the right-of-way. Conservatively, CDOT was noticed in accordance with Rule 1.6.2. Exhibit C-1 now accurately reflects the ownership of the right-of-way. Exhibit B has also been revised to accurately reflect the configuration of ownership parcels. 4. Based on observations during the pre-operation inspection conducted on June 26, 2006, several natural gas line valves have been installed at various locations across the site. In accordance with Rule 6.4.3(b), please identify the locations and owner of these structures on the Pre-Mining Plan Map. The Pre-Mining Plan Map has been revised to correctly illustrate the location and ownership of natural gas infrastructure on the subject site. In accordance with Rule 6.4.3, the gas pipeline traversing the subject property is considered, in its entirety and including both above-ground and below-ground components, to be a permanent man-made structure. The applicant has regularly coordinated with the gas developer to map gas infrastructure in its actual location. According to the gas developer, the structural component identified by the DMG as a valve is either a riser for future pipeline connection(s)