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• of the alluvial valley floor will also not be impacted since <br />excavation will be at depths less than the depth to groundwater <br />and adequate drainage and sediment controlwill be provided to <br />protect surface water systems. <br />Groundwater Effects of Alluvial Wells <br />Six wells are currently planned to be drilled for Western Fuels <br />Association to supply the water needs of the Deserado mining <br />pofob<< <br />operation. These wells will supply the ~. water needs for <br />the mine as well as any process water needs that are not met by <br />water encountered within the mine. The maximum expected total <br />flow requirement from these wells is 601 gpm (Ford, Bacon, and <br />• Davis, 1981). A well test conducted by Ford, Bacon, and Davis <br />is the fall of 1980 indicates that a yield of 125 gpm from <br />properly designed and constructed wells in the White River <br />alluvium near the river may be possible. The proposed location <br />of these wells is shown in Map 102. Five of the wells will be <br />located adjacent to the river to maximize the chances for adequate <br />production. Such a strategy also minimizes the effect of pumping <br />on the water table. <br />Drawdown calculations have been made to estimate the drawdown of <br />the water table due to pumping from these wells. The tests con- <br />ducted by Ford, Bacon, and Davis indicated transmissivities were <br />24,970 gpd/ft and 12,410 gpd/ft for wells WFU-1 (the pumped well) <br />• and Qal-3 (the observation well) respectively. For purposes of <br />4/81 II.D-22 <br />