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GENERAL45226
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Last modified
8/24/2016 8:14:09 PM
Creation date
11/23/2007 1:38:31 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981032
IBM Index Class Name
General Documents
Doc Date
12/21/1994
Doc Name
PROPOSED DECISION & FINDINGS OF COMPLIANCE FOR RN2
Permit Index Doc Type
FINDINGS
Media Type
D
Archive
No
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<br />govemment agencies. The only comments received were from the U.S. Fish and Wildlife <br />Service, which stated it had no objection to the renewal. A letter addressing adequacy concerns <br />was sent to the operator on November 21, 1994. On December 12, 1994, the operator responded <br />to the letter. All responses and information have been reviewed by the Division for compliance. <br />Description of the Environment <br />The Meeker Area Mines are located about eight miles northeast of Meeker, Colorado. The area <br />is found on the Ninemile Gap and Rattlesnake Mesa USGS quadrangle maps. Elevations in the <br />permit area of the mines range from 6833 feet along Curtis Creek to 8300 feet along the ridgeline <br />east of the Rienau No. 2 Mine portals. <br />The area of the Meeker Area Mines has historically supported a variety of uses such as ranching, <br />homesteading, coal mining, and wildlife habitat. Some historical uses such as homesteading have <br />been replaced by pastureland, and transportation and utility comdors. Many uses such as live- <br />stock grazing, wildlife habitat, and coal mining have occurred in the area for many years. <br />The mines are located along the north-facing slope of a closed topographic basin. This topo- <br />graphic basin is flanked by the Danforth Hills to the north and the Rattlesnake Mesa escarpment <br />to the south. The upland areas are steep to. moderately steep slopes, while the central basin <br />contains gently rolling hills and meadows. Curtis Creek and Aichers Draw have cut deep, steep- <br />sided valleys through Rattlesnake Mesa. <br />The coals of the Meeker Area Mines occur in the Upper Cretaceous Williams Fork Formation. <br />The Williams Fork Formation, along with the underlying Iles Formation and Mancos Shale <br />comprise the Mesaverde Group. Overlying the Mesaverde Group are Quaternary and Recent <br />deposits consisting of alluvial and coarse colluvial material. <br />Lithologically, the Williams Fork Formation consists of a thick series of predominantly non- <br />marine interbedded to laminated sandstones, siltstones, mudstones, shales, carbonaceous shales <br />and abundant coal seams of varying thicknesses. Except for the coal seams, the beds of the <br />Williams Fork Formation are laterally discontinuous. <br />Structurally, the mines are situated at the northern end of the Grand Hogback monocline and <br />along the southern limb of the Danforth Hills highlands, asoutheasterly-trending anticlinal <br />structure associated with the White River uplift to the east. The Danforth Hills anticline borders <br />the property on the north and is asymmetric with gentle dips to the north and much steeper dips <br />on the south flank where it is associated with the Sulfur Creek syncline. The mine is confined to <br />the Sulfur Creek syncline which is asymmetric and doubly plunging minor faulting is present in a <br />subparallel pattern near the axis of the syncline. <br />Stratigraphically, the lowest coal bed mined was the G seam, which occurs approximately 550 <br />feet above the base of the Williams Fork Formation. The bed ranges in thickness from 6 to 22 <br />feet. The FF seam, which is stratigraphically the uppermost coal bed mined, occurs approxi- <br />mately 2200 feet above the base of the Williams Fork Formation. The FF seam ranges in <br />thickness from 7 to 10 feet. The P seam was also included in the mine plan and occurs <br />approximately 1200 feet below the base of the FF seam. <br />3 <br />
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