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12/16!2005 16:04 9709295595 <br />24tI.4.04 WeU Projcd Plan <br />Minor Revision 332 <br />Page 3 of 1] <br />WEST ELK PAGE 0t; <br />initial geological work, in this area was, completed by W. T. Lee (1912), who reported <br />legs findingsva, "Coal Fields of Cnaad Mcsa and the West Elk Mountains, Colorado" <br />(USGS Bulletin 510). Later in 1948, Ward 1:1. Johnson published a USGS map of the <br />Paonia Coal Field incorporating drill bole data generated tlvnugh a USGS and U.S. <br />Bureau of Mmes drilling program. The following year!Johnson further descnlted the <br />geology of the Minnesota Creels area in USBM Technical Paper 72l . More recently, in <br />1989, C. li. Dunrud compiled a coal. resources map of the region (USGS Map C-115). In <br />1995 the Colorado Geological Survey published, "Availability of Coal Resources in <br />Colorado: Somerset Quadrmagle, West-Central Colorado (CGS Resource Series 3~". <br />The general stratigtaphy of the area consists of members of the Mesa Verde Formation of <br />the Upper Cretaceous System utederlyiag the Wasatch Formation of Tertiary Age. lire <br />Barren Member of the Mesa Verde formation craps out lowest is the area with the <br />overlying Ohio Creels member exposed along many of the steeper slopes. Above the <br />lbiesa Verde, rocks of the Wasatch Formation are exposed The Upper and Lower Coal <br />Members of the Mesa Verde Formation are the major coal-beating emits in the auea The <br />A (King), B (Somerset), and C (Bear) coal beds of the Lower Coal Membea and the D <br />(Olivet), E (Hawks Nest), aced the F-Scant coal beds of the Upper Coal Member have all <br />been mined within the Nortt Pork Valley. <br />General dip in area of the methane drainage project drilling is 3 in 4 degrees to the <br />northeast Sttatigraphic displacements and faults are known w occur in West Elk Mme. <br />Known geologic data does not indicate that these faults are locatable on the suaface. <br />WATER RESOURCES <br />The town of Paoma is situated about 10 miles west of the area and receives an average of <br />apptvttimately is inches of precipitation anmeally. Gives that precipitation i~ucxrases as <br />etevation increases, the anneal precipitation ai the proposed well sites wnuid be expected <br />do be somewhat higher than that received at Pacers. An estimated 75% of the annual <br />precipitation occurs riming late winter and early spring, mostly as saowlall. Jtme, July, <br />and August are otllea the driest months. <br />Drainage from the well pall for the proposed pe+ojed primarily enters unnamed tributaries <br />of the North Fork of the Cmm~ison River. No .riparian, wetiawd or stream habitat will be <br />a$ected by drilling activities. <br />The alternate sediment corr4vls used for this drill pad will consist of a slash, silt fence or <br />straw wattles placed on the out slopes of the pad. The demonstrations that the alternative <br />sediment control measures meet the limitations of Rule 4.05.2 and 4.05.5 ate coataireed in <br />the attached S)rACAD results that were r~ for 0.5-, l.0- and 20-acre typical pad sites. <br />These calculations are in TR-101 and outer previoeLSly submitted documents. <br />