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the K8ine, including disturbance areas described herein, ultimately reports to the Eagle River <br /> located south Df |-7O. <br /> The depth to groundwater at the Mine is not knowm hovvever, groundwater has not been <br /> encountered in either the Lower Pit or Upper Pit to date. <br /> Drawing 03 shows dry creek beds, streams, springs, and rivers (mostly un-named) in relation to <br /> the proposed Upper Pit and East Pit. <br /> 5~3 Geology and Soils <br /> 5.3-1 Geology <br /> The site is predominantly the Eagle Valley Evapohte (lPee), with unconsolidated deposits (0g) in <br /> the river valley to the south and basalt (Tbb) in the mountains to the north according to available <br /> geology mapping (Txveho at a|.. 1878). Definitions for these geologic units one included below and <br /> are shown in relation tothe mine site in Figure 5.1: <br /> |Pee: Eagle Valley Ev@pOrite (Pennsylvanian) — Gypmunn, anhydrite, and interbedded <br /> Si|t8tone and minor dolomite; contains thick salt at depth in some places, as shown by <br /> xve||S drilled for oil and gas. |ntertongues with N1inturn, Belden, and Maroon Formations <br /> and grades into fine-grained C|8GUorookS of Eagle Valley Formation. [}i@piritioin structural <br /> configuration in many p|anea, especially in large area in central part of quadrangle. <br /> Thickness indeterminate; <br /> . <br /> QQ: Unconsolidated deposits (Pleistocene): Young gravels (Bull Lake and younger) — <br /> Stream, ternaoe, and ou0wesh gravels; and <br /> Tbb: Basalt ofBimodal Suite (Pliocene and Miocene)—Dense black resistant alkali basalt in <br /> lava-flow |oyena 5 to 200 feet thick, and interbedded tuffs and volcanic conglomerates. <br /> Greatest preserved thicknesses are BOO feet on White River Plateau and 800 feet on <br /> Grand Mesa. AogS determined from several locality range from 8to23 million years. <br /> 45 <br />� <br />� <br />