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Table 17-3 <br /> Summary of Ground Water Aquifer Characteristics <br /> Hydraulic <br /> Conductivity Transmissivity <br /> Geometric Mean Storage Coefficient Geometric Mean Hydraulic Gradient <br /> Aquifer Value (ft/day) Geometric Mean Value Value (ft 2/day) Average Value (ft/ft) <br /> Overburden 0.61 1*10-4 26 .046 <br /> Dakota Coal 0.16 1*10-5 2.6 .046 <br /> 17-5 Revised 04/11/88 <br />