Blackett (1994) lists 792 thermal wells and springs in the new Utah database, a 150% increase over the assessment in the 1980 compilation. He estimates there are 161 different hydrothermal resource areas. Utah comprises parts of three major physiographic provinces, the Colorado Plateaus, the Middle Rocky Mountains and the Basin and Range. Hydrothermal resources with temperatures greater than 50°C occur in each province, and in the Transition Zone between the Basin and Range and Colorado Plateaus in central Utah. Commercial greenhouses use thermal water for space heat at Newcastle in Iron County, and at Crystal Hot Springs in Salt Lake County. Ten resorts use thermal waters for swimming pools, spas and baths. Seven geothermal areas in Utah are recommended for additional studies. Slim hole drilling, geohydrologic studies and numerical modeling of fluid flow and heat transfer are needed in one area. Four other areas need hydrologic and space heating feasibility studies and a limited exploration program to determine resource potential is needed at two areas.
Blackett, R. E., 1994. Low-Temperature Geothermal Water in Utah: A Compilation of Data for Thermal Wells and Springs Through 1993, Utah Geological Survey Open File Report 311, 34 p.