2010-11-30_APPLICATION CORRESPONDENCE - C2010088 (2)

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Corey Heaps CAM - Colorado, LLC November 30, 2010 Page 4 differ from premine land use, then that will need to be described. For instance, if a portion of the permit area was grazed by domestic livestock prior to permitting of the loadout, but livestock grazing is not planned or desired by the Iandowner as a postmining use, that should be clarified. If the land uses have changed within the previous 5 years, the historic land uses should also be described. Rule 2.04.4 Cultural and Historic Resource Information 5. Please refer to the enclosed comment letter from the Colorado Historic Society (CHS) dated October 21, 2010 provided in Attachment 1. Following their review of the Class III Cultural Resource Inventory report and additional documentation provided to them by Grand River Institute they concur that a finding of no historic properties affected is appropriate for the proposed project. Please note the following as indicated in the CHS letter. Should unidentified archaeological resources be discovered in the course of the project, work must be interrupted until the resources have been evaluated in terms of the National Register of Historic Places eligibility criteria (36 CFR 60.4) in consultation with the their office. No further response from CAM is necessary at this time. Rule 2.04.6 Geology Description 6. The first sentence of Section 2.04.6 indicates that the discussion of geology is derived from the 1955 Grand Junction Soil Survey. The Division has compared the text provided with the application against the Geologic Map of Colorado published in 1979. We suggest that the names of a number of the geologic units have been revised, and we recommend that portions of the section be reworded as follows: Replace the 1St sentence of page 2.04.9: "The following discussion of geology is derived from the 1955 Grand Junction Soil Survey and from the 1979 Geologic Map of Colorado." Replace 4th — 5 th sentences: "To the north and northeast, the Mancos shale is capped by the Cretaceous Mount Garfield Formation and Sego Sandstone, forming the Book Cliffs. The Book Cliffs stand out in bold relief above the valley, rising in elevation from 5,500 feet at their base to a crest of 6,500 to 7,000 feet. Replace the second paragraph of page 2.04.9: "The Mount Garfield Fm. and Sego Sandstone contain buff to yellowish -brown sandstone bedded with soft gray shale that contains one or more beds of bituminous coal and underlying thick beds of sandstone that rest upon the marine Mancos shale." In the fourth paragraph of page 2.04.9 replace the 1" sentence: Overlying the Mount Garfield and Sego Sandstone are the Hunter Canyon, Wasatch, Green River and Uinta Formations, which successively rise to the lava- capped deposits on Grand Mesa.