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Mayo and Associates, LC <br />~~ <br />~~ <br />~~ <br /> <br />Ground-water ages and the SZH and S~sO compositions of surface and in-mine water in <br />the vicinity of Soldier Creek Mine (Mayo and Associates, 1996a) indicate that in-mine <br />waters aze from the inactive zone and the surface water aze from the active zone as <br />defined by Mayo et al. (2003). <br />3.2 PacifiCorp -Energy West Mines (Wasatch Plateau, Utah) <br />The PacifiCorp has mined the Hiawatha and Blind Canyon coal seams (Figure 3) in three <br />mines Deer Creek, Cottonwood, and Trail Mountain. Both Cottonwood and Trail <br />Mountain have been sealed since 2001 and the Deer Creek mine is active (Semborski, <br />personal communication, 2004). Inmost locations the Hiawatha Seam lies directly on <br />the Spring Canyon Member of the Star Point Sandstone. Tn some locations, a 0-15 foot <br />thick shaley lagoonal deposit is present between the Hiawatha Seam and the top of the <br />Spring Canyon Member. The Blind Canyon Seam lies approximately 80 feet above the <br />Hiawatha Seam (Figure 7). <br />Evaluation of Potential Groundwater Inflows 25 <br />Associated with E Seam Mining, <br />West Ells Mine, Somerset, Colorado <br />February 24, 2004 <br />