Gregory C. Lines Scott D. Bartholoma Daniel J. Morrissey 1980 <p><span>A three-dimensional finite-difference computer model of the Ferron sand-</span><span>stone aquifer was used to simulate ground-water flow in the Emery coal field </span><span>in east-central Utah. The model also was used to predict the effects of pro-</span><span>posed surface mining and the resulting mine dewatering on potentiometric sur-</span><span>faces of the aquifer. The model was calibrated in a steady-state simulation </span><span>using water levels and manmade discharges from the aquifer that were measured </span><span>during 1979. Too few data were available to verify the calibrated model in a </span><span>transient-state simulation with historical aquifer response to manmade dis-</span><span>charges. Predictions made with the model are considered to be semiquantita</span><span>tive. Discharge from the proposed surface mine was predicted to average 0.3 </span><span>cubic foot per second during the 15 years of operation. Drawdowns of 5 feet </span><span>in the potentiometric surface of the aquifer were predicted to extend as much </span><span>as 3 miles from the proposed mine after 15 years of operation. </span></p> application/pdf 10.3133/wri8062 en U.S. Geological Survey Three-dimensional digital-computer model of the Ferron sandstone aquifer near Emery, Utah reports