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Section 780.21 (b) Continued. <br />below. Because mining will remove the shale aquitard above the <br />aquifer, the geographical location of the saturated portion and of <br />the recharge area could move several feet downslope. No wells have <br />been planned or will be needed upslope of this new location and any <br />effects caused by the slight movement will be minimal, especially <br />when offset by increased available quantities of water from the <br />saturated spoil. <br />Dewatering of the boxcuts will only be necessary in the Eckman Park <br />area and will cause temporary drawdown of the adjacent undisturbed ~j/ <br />portion of the overburden aquifer. As shown on Figure 33, Eckman ~,f 7y,~, <br />Park Mine Discharge, dewatering from the boxcut will begin in early~~~~M~ <br />1980, reach a peak of 38,000 gallons per day in mid-1981, and will ~~ <br />end in mid-1984. The total amount of ground water to be pumped o t,~ n <br />/e. o~ <br />will be approximately 118 acre-feet over the 4.5 year period at an <br />~4~•~ <br />average rate of 0.036 cubic feet per second. This water will be <br />• pumped into Foidel Creek through a sedimentation pond. As discussed <br />in this Section under paragraph (c), no measureable drawdowns are <br />expected any further than 5,000 feet, in a worst case situation, <br />from the boxcut. This is based on an equation by Lohman (1972) and <br />is shown on the Twentymile Park Cumulative Hydrologic Effects (Map <br />53). Because this drawdown is temporary and because no private <br />wells are completed in the aquifer within the 5,000 foot radius, no <br />adverse effects will occur as a result of dewatering the boxcuts. <br />Water supply for operational needs, such as haul road watering, <br />sanitary facilities, equipment washing, and other commercial and <br />industrial purposes will be obtained from water collecting in the <br />existing 8050 pit (See Energy Ptines No. 1 and 2 Mine Plan (Map 1)), <br />or from Energy Well No. 7, and will total approximately 25 acre- <br />feet per year. Each is a legal source. Energy Fuels has a right <br />decreed in Division 6, Court Case W-1392-77 for 120 acre-feet per <br />year from the 8050 pit. Well No. 7 operates under Permit No. <br />• 23332-F, issued by the State Engineer for 35 acre-feet per year. <br />780-169 <br />