A hydrologic study of the Dickson, Tennessee, area provided additional information on the occurrence of ground water in the Mississippian carbonate rocks of the western Highland Rim. Twenty-six test wells were drilled to determine the occurrence of ground water in relation to topographic position, regolith thickness, streamflow gains or losses, and the lithology of the underlying formations. Yields to 26 test wells ranged from 0 to about 300 gal/min and averaged about 68 gal/mi. Nine wells yielded 80 to about 300 gal/min; their specific capacities ranged from about 0.71 to 12.7 (gal/min)/ft of drawdown. Seven of these nine wells yielded water from solution openings in the Warsaw Limestone. The other two wells yielded water from gravel and sand in the regolith. Yield-specific-capacity tests were made on two wells. One well was pumped at an average rate of 350 gal/min for 72 hours with 39.77 feet of drawdown. The second well was pumped for 8 hours at 120 gal/min with 20.86 feet of drawdown. The water from both wells was generally of good quality. Dissolved solids concentrations were less than 200 mg/L. (USGS)