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<br /> <br />1 <br />' Section 2.04.7 Hydrology Description. <br /> (1) Ground Water Information. <br />1 <br /> General. The continental and marine shales and sandstone <br />' underlying the coal bearing zone have a potential recoverable <br /> groundwater supply of up to 600 acre-feet of water per square <br />' mile, depending on strata thickness. In Gunnison and Delta <br /> Counties, little information exists about actual depth of <br />' groundwater except along perennial streams (Price and Arrow, <br /> 1974). Similarly, flow rates from non-streambed aquifer wells <br /> are also unknown. Shales, especially the irancos °hale, have <br />t shown high dissolved solids concentrations (1,000 to 3,000 <br /> milligrams/liter) in wells tapping that aquifer between Paonia <br />' and Hotchkiss. <br />' (a)(i) and (ii). Depth and extent of water table and aquifers. <br /> The elevation of the water table across the lease is variable <br /> and unpredictable. From observation wells drilled by P.P.CO, <br /> it has been impossible to establish a trend to estimate the <br />' water table elevation. It varies by structure, topography, <br />th <br />For th <br />d l <br />ti <br />t <br />ti <br />i <br />f <br /> an <br />e same reasons <br />e po <br />en <br />oca <br />on. <br />ometr <br />c sur <br />ace <br /> is at pres~n-t. indetermina?o~lee <br />1 <br /> Drawing 2.04.7(1)(a)(i)-1 shows the location of eleven wells <br />' drilled to determine water level and water quality in the area <br /> of the mine. These wells were drilled by ARCO as part of their <br />' investigation for the Mount Gunnison D7ine No. 1. Information <br /> presented herein has been derived from data gathered for the <br /> Mount Gunnison D4ine No. 1, and presented in the ARCO Application <br />' for Permit on file with the MLR and CSM. <br /> <br />1 <br />44 <br />