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GENERAL49492
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Last modified
8/24/2016 8:28:30 PM
Creation date
11/23/2007 5:09:42 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981013
IBM Index Class Name
General Documents
Doc Date
1/25/1991
Doc Name
OSM Mine Plan Decision Document Coal Lease C-067
From
OSM
To
Wyoming Fuel Company
Permit Index Doc Type
Other Permits
Media Type
D
Archive
No
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• 2 <br />Description of the Eaiating Errvironment <br />The Golden Eagle Mice is located in the Trinidad coal field of the Raton <br />Basin. The field is underlain by sedimentary rocks of Cretaceous and Tertiary <br />age of which the coal-bearing rocks include the Vermejo Formation of Upper <br />Cretaceous age and the Raton Formation of Upper Cretaceous - Paleocene age. <br />Surface sediments in the area of the mine are sandstones and shales of the <br />Paleocene age, Poison Canyon Formation and the upper and middle members of the <br />Raton Formation. The dip of these formations is from 1° - 5° to the northeast <br />in the area of the mine. Exploration holes drilled on portions of the Federal <br />lease lands, C-067, show numerous coal beds of which five are greater than one <br />foot in thickness. These are, in descending order, the Blue, Red, Maxwell, <br />Apache and Allen beds which together contain a reserve base of 21,220,000 tons <br />within the lease lands, Limited thickness and lenticularity exclude all but the <br />Blue and Haswell beds from consideration as minable coal, and the limited areal <br />eatent of the Blue bed, by dictating the more flexible but also more costly <br />room and pillar mining method, presently exclude it from the recoverable <br />reserve base. Hence, it is the Maxwell bed, in the lower member of the Raton <br />Formation, that Wyoming Fuel is planning to extract, via longwalling, which is <br />also the only mining method believed to be presently economic on the property. <br />Should future economics and market demand render the Blue seam reserves <br />recoverable, the large interburden (400 feet) between the Haswell and the <br />overlying Blue, and the uniform disruption generated by undermining with <br />longwall would allow for such recovery. <br />It is possible that other beds eaist within the Federal lands at greater depths <br />in the Vermejo Formation, but eaisting drill hole data is too shallow to <br />determine their presence and/or mineability. <br />Within the Federal lease, the Maxwell bed varies in thickness from 4.5 to 7.5 <br />feet and is covered by 300 to 1,400 feet of overburden. The bed is bounded by <br />grey shales. An average at the quality analyses taken from drill holes on or <br />immediately adjacent to the Federal lease is as follows: <br />As-Received Basis <br />Average Analysis <br />Moiatnre 1.0% <br />• _ ~ ?.' - 12.4% <br />~ Carbon 58.0% <br />qF 0.40% <br />" /}fib; 13,500 <br />~' ~, <br />:& ,. <br />This equates to a rank of highwolatile B bituminous coal. The coal is useable <br />for blending with premium coking coals at coke oven feed but all sales for the <br />foreseeable future are in the steam coal - utility market. <br />The only identified mineral resource other than coal on the lease lands is cos: <br />bed methane for which there are no plans at present to recover ahead of coal <br />extraction. <br />
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