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-12- <br /> • " <br /> of no effect or no adverse effect from the Colorado SHPO for each eleigble <br /> site. For each site that a determination of "no effect" or "no adverse <br /> effect" cannot be made, the permittee will prepare and submit to the Division <br /> and OSM a site specific plan for mitigating damage to the sites resulting from <br /> the adverse effects of surface subsidence. This plan will be approved by the <br /> Division and OSM prior to conducting any underground mining within Federal <br /> Coal Lease C-8424. The approved plan will be submitted in a form which can be <br /> inserted into the permit application. <br /> Pursuant to Rule 2.07.6(2)(e) , the Division .finds the permittee will not <br /> adversely affect any publicly owned park or place listed in the National <br /> Register of Historic Places. The operation is in compliance with the <br /> requirements of this section. <br /> IV. Geology - Rules 2.04.5, 2.04.6(2) <br /> The permittee has provided a description of the geology of the permit and <br /> adjacent areas in Section II. B. of Volume 1 and on Map 4 of Volume 5 of the <br /> permit application. This information has been reviewed by the Division to <br /> determine compliance with the Colorado Rules and Regulations. <br /> All mining and related mining activity associated with the Deserado Mine will <br /> be performed within the Mesaverde Group. The carbonaceous zone containing the <br /> coal beds of interest occupies the basal 200 to 300 feet of the Lower Williams <br /> Fork Formation. The B and 'D coal seams are contained in a 25- to 50-foot <br /> interval occurring 10 to 40 feet above the top of the B Horizon sandstone. <br /> Although coals are prevalent throughout the rest of the carbonaceous zone, <br /> they are commonly too thin or of too little lateral extent to be considered <br /> mineable. <br /> Westen Fuels' 1978 drilling program identified nine coal seams traceable <br /> throughout all or part of the mine permit area. These nine seams occur in the <br /> basal 200 to 300 feet of the Lower Williams Fork Formation. The lithology of <br /> the coal bearing zone is predominately siltstone, shale, carbonaceous shale <br /> and coal interbedded with thin, discontinous, often calcareous sandstone <br /> units. The siltstones and sandstones commonly contain abundant carbonaceous <br /> material . The lower limit of the zone is marked by the B Horizon sandstone. <br /> The underlying Iles Formation is characterized by thick (20 to 40 feet) <br /> sandstones and occasional very thin carbonaceous shales or coals. The <br /> interval of the Upper Williams Fork Formation overlying the coal bearing zone <br /> is characterized by a marked change to coarser grained sediments. Very thick, <br /> continuous, occasionally silty sandstone units are predominant. Coals, where <br /> present, are thin ( 1 .0 foot or less) and laterally discontinuous. <br /> The nine coal seams have been labelled A, B, C, D, E, F, G, H and J in <br /> ascending order. Two typical cross sections are presented in Figure II.B-2 of <br /> Volume 1 of the application. Additional cross-sections for new Federal Lease <br /> areas are provided in Illustration 36, 37 and 38, within Volume 12 of the <br /> application. _ <br /> Geochemical and physical analyses of the roof, .floor and coal for both the B <br /> and D seams are provided at the end of Section II.B. in Volume 1 of the permit <br /> application. Sample cores of two feet of roof rock and one foot of floor rock <br /> were described and analyzed separately for each of four core holes drilled <br /> within Federal Coal Lease C,-023703. Due to the proximity of the sampled core <br />