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M.id-Continent has defined the ground ;cater <br /> characteristics associated t�with Coal Basin through the use <br /> of shallow alluvial observation Wells and underground mine <br /> dewatering recor.Cls . In add'itioP , information obtained from <br /> the coal exploration drilling program provided data to <br /> define : <br /> the depth and horizontal extent of potential <br /> aquifer units , <br /> - the aquifer litholo;y and thickness and <br /> - whet-her the aquifers are confined (artesian) <br /> or unconfined ('Water table) . <br /> The company also obtained available informa- <br /> tion from the U . S . Geological Survey and the U .. S . Forest <br /> Survev to augment the hydrologic data base . <br /> b . Description of aquifers and water table <br /> (1) General <br /> The major aquifers in and adjacent to <br /> the permit area are the alluvial stream deposits , the <br /> Mesaverde , the Wasatch formation and the Ohio Conglomerate . <br /> The units that could potentially be effected by the mine <br /> include the alluvium and Upper , Middle and Rollin a s Sandstone <br /> stcne <br /> Units of t e _•iesaverde Formation . See Geologic Cross Section <br /> Mrs at Exhibits III-D-3 (a-c) <br /> ( 2) Alluvial - unconsolidated materials <br /> The alluvium is the most prominent <br /> aquifer in study area . Ti:_ck allu-a_al dep _t �^ <br /> os _ yield <br /> 'rall per minute to i P'L^QiyC _O?i iJEll The Sn`1 0',7 <br /> _: 2 <br />