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GENERAL31361
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Last modified
8/24/2016 7:54:33 PM
Creation date
11/23/2007 6:59:30 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1984067
IBM Index Class Name
General Documents
Doc Date
9/3/1985
Doc Name
PROPOSED DECISION AND FINDINGS OF COMPLIANCE
Permit Index Doc Type
FINDINGS
Media Type
D
Archive
No
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<br />III. Cultural and Historic Resources - Rules 2.04.4 and 2.05.6(4) <br />The applicant has submitted information on cultural and historic resources in <br />Section 2.04.4 and Exhibit 9 of the permit application. <br />Contact with State Historic Preservation Office indicated that there are no <br />known cultural resources within the permit area, or resources listed on the <br />National Register of Historic Places. <br />The applicant is in compliance with the requirements of this section. <br />IV. Geology - Rules 2.04.5 and 2.04.6 <br />The applicant has supplied geologic information pertaining to the proposed <br />operation and adjacent areas. This information may be reviewed in Sections <br />2.04.5 and 2.04.6 of the permit application. Additional information is <br />available in the PAR response. <br />The proposed Coal Gulch Mine is located on the northwestern rim of the San <br />Juan Basin. The San Juan is an asymmetric structural basin in southwestern <br />Colorado and northwestern New Mexico. The basin contains sedimentary rocks <br />ranging in age from Cambrian to Holocene. The consolidated strata exposed in <br />and near Coal Gulch were deposited during the upper Cretaceous by <br />transgressing and regressing seas. <br />The Perine Peak Syncline, identified by the applicant as a local synclinal <br />structure, crosses the southeastern corner of the permit area striking about <br />N20oE. The regional significance of this structure is minor. No large <br />displacement faulting has been identified in the permit or adjacent areas. <br />The stratigraphic units of interest include units of the Upper Cretaceous <br />Mesaverde Group. The lowermost member of the Mesaverde Group is the 300 feet <br />to 400 feet thick Point Lookout Sandstone. The upper portion of the Point <br />Lookout is a massive, white to buff cliff forming sandstone, while the lower <br />portion becomes shaley, and grades into the underlying Mancos Shale. <br />The Menefee Formation, which conformably overlies the Point Lookout Sandstone, <br />is the coal bearing unit in this area. At the proposed mine site, the Menefee <br />dips 3o to the southeast, and strikes N65oW. This formation consists of <br />approximately 350 feet of interbedded sandstone, shale, carbonaceous shale, <br />and coal. Two coal seams, the 'A' and 'C', appear to be the most continuous <br />units in the formation. The 'A' seam which is the coal to be extracted, is 5 <br />feet to 6 feet thick, and is 100 feet to 150 feet below the 'C' seam, which is <br />3 feet to 4 feet thick. <br />Conformably overlying the Menefee Formation is the uppermost member of the <br />Mesaverde Group, the Cliff House Sandstone. <br />
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