Colorado has ninety-three known thermal areas including natural springs, augmented natural springs, and wells. The state’s warm springs are classified as low temperature — less than the boiling point of water — and are used for recreational bathing, aqua-culture, minor space heating, and heating greenhouses.
Barrett, James K., and Richard H. Pearl. “Bulletin 39 – An Appraisal of Colorado’s Geothermal Resources.” Geothermal. Bulletin. Denver, CO: Colorado Geological Survey, Department of Natural Resources, 2006 1978. https://coloradogeologicalsurvey.org/publications/geothermal-resources-colorado.
Berkman, Frederick E., and Christopher J. Carroll. “MS-45 Interpretive Geothermal Heat Flow Map of Colorado.” Geothermal Heat Flow, 1:500,000. Map Series. Denver, CO: Colorado Geological Survey, Department of Natural Resources, July 2008. https://coloradogeologicalsurvey.org/publications/interpretive-geothermal-heat-flow-map-colorado.
Berkman, Frederick E., Paul Morgan, and Nicholas A. Watterson. “MS-48 Oil and Gas Wells in Areas of Colorado with Superior Geothermal Properties.” Geothermal, 1:500,000. Map Series. Denver, CO: Colorado Geological Survey, Department of Natural Resources, March 2010. https://coloradogeologicalsurvey.org/publications/oil-gas-wells-geothermal-colorado.
Berkman, Frederick E., and Nicholas A. Watterson. “MS-51 Interpretive Geothermal Gradient Map of Colorado.” Geothermal, 1:500,000. Map Series. Denver, CO: Colorado Geological Survey, Department of Natural Resources, 2010. https://coloradogeologicalsurvey.org/publications/interpretive-geothermal-gradient-map-colorado.
Burroughs, Richard L. “SP-17 A Summary of the Geology of the San Luis Basin, Colorado – New Mexico with Emphasis on the Geothermal Potential for the Monte Vista Graben.” Geothermal Resources. Special Publication. Denver, CO: Colorado Geological Survey, Department of Natural Resources, 1981. https://coloradogeologicalsurvey.org/publications/geology-san-luis-basin-colorado-new-mexico-geothermal-potential-monte-vista-graben.
Cappa, James A., and H. Thomas Hemborg. “OF-95-01 1992-1993 Low Temperature Geothermal Assessment Program, Colorado.” Geothermal. Open File Report. Denver, CO: Colorado Geological Survey, Division of Minerals and Geology, Department of Natural Resources, 1995. https://coloradogeologicalsurvey.org/publications/1992-1993-low-temperature-geothermal-assessment-program-colorado.
Coe, Barbara A. “IS-09 Geothermal Energy Development in Colorado: Processes, Promises and Problems.” Geothermal. Information Series. Denver, CO: Colorado Geological Survey, Department of Natural Resources, 1978. https://coloradogeologicalsurvey.org/publications/geothermal-energy-development-colorado.
———. “OF-80-11 Community Development of Geothermal Energy in Pagosa Springs, Colorado.” Geothermal Resources. Open File Report. Denver. CO: Colorado Geological Survey, Department of Natural Resources, 1980. https://coloradogeologicalsurvey.org/publications/community-development-geothermal-energy-pagosa-springs-colorado.
———. “OF-80-13 Geothermal Energy Potential in the San Luis Valley, Colorado.” Geothermal Resources. Open File Report. Denver. CO: Colorado Geological Survey, Department of Natural Resources, 1980. https://coloradogeologicalsurvey.org/publications/geothermal-energy-potential-san-luis-valley-colorado.
Coe, Barbara A., and Nancy A. Forman. “IS-15 Regulation of Geothermal Energy Development in Colorado.” Geothermal. Information Series. Denver, CO: Colorado Geological Survey, Department of Natural Resources, 1980. https://coloradogeologicalsurvey.org/publications/regulation-geothermal-energy-development-colorado.
Coe, Barbara A., and Judy Zimmerman. “OF-81-02 Geothermal Energy Opportunities at Four Colorado Towns.” Geothermal Resources. Open File Report. Denver. CO: Colorado Geological Survey, Department of Natural Resources, 1981. https://coloradogeologicalsurvey.org/publications/geothermal-energy-opportunities-colorado-towns.
Coe, Kenneth L. “SP-20 Industrial Market Opportunities for Geothermal Energy in Colorado.” Geothermal Resources. Special Publication. Denver, CO: Colorado Geological Survey, Department of Natural Resources, 1982. https://coloradogeologicalsurvey.org/publications/industrial-market-opportunities-geothermal-energy-colorado.
Galloway, Michael J. “SP-10 Hydrologic, Geothermal, and Geologic Maps of the Pagosa Springs Area, Colorado.” Hydrologic, Geothermal, and Geologic. Special Publication. Denver, CO: Colorado Geological Survey, Department of Natural Resources, 1977. https://coloradogeologicalsurvey.org/publications/hydrogeologic-geothermal-investigation-pagosa-springs-colorado.
Healy, F. C. “OF-80-10 Geothermal Energy Potential in Chaffee County, Colorado.” Geothermal Resources. Open File Report. Denver. CO: Colorado Geological Survey, Department of Natural Resources, 1980. https://coloradogeologicalsurvey.org/publications/geothermal-energy-potential-chaffee-colorado.
McCarthy, K. P., T. G. Zacharakis, and C. D. Ringrose. “RS-17 Geothermal Resource Assessment of the Animas Valle, Colorado.” Geothermal Resources. Resource Series. Denver, CO: Colorado Geological Survey, Department of Natural Resources, 1982. https://coloradogeologicalsurvey.org/publications/geothermal-assessment-animas-valley-colorado.
McCarthy, Kevin P. “OF-82-05 Geothermal Implications of Warm Mine Water Drainage at Lake City and Cripple Creek, Colorado.” Geothermal Resources. Open File Report. Denver. CO: Colorado Geological Survey, Department of Natural Resources, 1982. https://coloradogeologicalsurvey.org/publications/geothermal-implications-mine-water-drainage-lake-city-cripple-creek-colorado.
McCarthy, Kevin P., Ted G. Zacharakis, and Richard Howard Pearl. “RS-18 Geothermal Resource Assessment of Hartsel, Colorado.” Geothermal Resources. Resource Series. Denver, CO: Colorado Geological Survey, Department of Natural Resources, 1982. https://coloradogeologicalsurvey.org/publications/geothermal-resource-assessment-hartsel-springs-colorado.
Meyer, Richard T., Barbara A. Coe, and Jay D. Dick. “OF-81-03 Appendices of an Appraisal for the Use of Geothermal Energy in State-Owned Buildings in Colorado.” Geothermal Resources. Open File Report. Denver. CO: Colorado Geological Survey, Department of Natural Resources, 1981. https://coloradogeologicalsurvey.org/publications/appraisal-geothermal-energy-state-buildings-colorado.
———. “RS-14 An Appraisal for the Use of Geothermal Energy in State-Owned Buildings in Colorado.” Geothermal. Resource Series. Denver, CO: Colorado Geological Survey, Department of Natural Resources, 1981. https://coloradogeologicalsurvey.org/publications/geothermal-energy-appraisal-state-owned-buildings-colorado.
Oerter, Erik J., Frederick E. Berkman, and Christopher J. Carroll. “IS-76 Colorado Geothermal Bibliography.” Geothermal Bibliography. Information Series. Denver, CO: Colorado Geological Survey, Department of Natural Resources, 2008. https://coloradogeologicalsurvey.org/publications/geothermal-bibliography-colorado-2007.
Pearl, Richard H. “Bulletin 35 – Proceedings of a Symposium on Geothermal Energy and Colorado.” Geothermal. Bulletin. Colorado Geological Survey, Department of Natural Resources, 1974. https://coloradogeologicalsurvey.org/publications/proceedings-symposium-geothermal-energy-colorado.
———. “MS-14 Geothermal Resources of Colorado.” Geothermal, 1:500,000. Map Series. Denver, CO: Colorado Geological Survey, Department of Natural Resources, 1980. https://coloradogeologicalsurvey.org/publications/geothermal-resources-colorado.
Pearl, Richard H., Ted G. Zacharakis, Frank N. Repplier, and Kevin P. McCarthy. “Bulletin 44 – Bibliography of Geothermal Reports in Colorado.” Geothermal Bibliography. Bulletin. Denver, CO: Colorado Geological Survey, Department of Natural Resources, 1981. https://coloradogeologicalsurvey.org/publications/bibliography-geothermal-reports-colorado.
Pearl, Richard Howard. “SP-02 Geothermal Resources of Colorado.” Geothermal Resources. Special Publication. Denver, CO: Colorado Geological Survey, Department of Natural Resources, 1972. https://coloradogeologicalsurvey.org/publications/geothermal-resources-colorado-1972.
Pearl, Richard Howard, Ted G. Zacharakis, and Charles D. Ringose. “RS-22 Geothermal Resource Assessment of the Steamboat-Routt Hot Springs Area, Colorado.” Geothermal Resources. Resource Series. Denver, CO: Colorado Geological Survey, Department of Natural Resources, 1983. https://coloradogeologicalsurvey.org/publications/geothermal-resource-assessment-steamboat-hot-springs.
———. “RS-23 Geothermal Resource Assessment of Hot Sulphur Springs, Colorado.” Geothermal Resources. Resource Series. Denver, CO: Colorado Geological Survey, Department of Natural Resources, 1982. https://coloradogeologicalsurvey.org/publications/geothermal-resource-assessment-hot-sulphur-springs-colorado.
Repplier, F. N., T. G. Zacharakis, and C. D. Ringrose. “RS-16 Geothermal Resource Assessment of Idaho Springs, Colorado.” Geothermal Resources. Resource Series. Denver, CO: Colorado Geological Survey, Department of Natural Resources, 1982. https://coloradogeologicalsurvey.org/publications/geothermal-resource-assessment-idaho-springs-colorado.
Repplier, Frank N., and R. L. Fargo. “MS-20 Geothermal Gradient Map of Colorado.” Geothermal Gradient, 1:500,000. Map Series. Denver, CO: Colorado Geological Survey, Department of Natural Resources, 1981. https://coloradogeologicalsurvey.org/publications/geothermal-gradient-map-colorado.
Zacharakis, Ted G. “SP-16 Geothermal Resource Assessment of Waunita Springs, Colorado.” Geothermal Resources. Special Publication. Denver, CO: Colorado Geological Survey, Department of Natural Resources, 1981. https://coloradogeologicalsurvey.org/publications/geothermal-resource-assessment-waunita-hot-springs-colorado.
Zacharakis, Ted G., and Richard Howard Pearl. “RS-20 Geothermal Resource Assessment of Cañon City, Colorado Area.” Geothermal Resources. Resource Series. Denver, CO: Colorado Geological Survey, Department of Natural Resources, 1982. https://coloradogeologicalsurvey.org/publications/geothermal-resource-assessment-canon-city-colorado.
Zacharakis, Ted G., Richard Howard Pearl, and Charles D. Ringose. “RS-19 Geothermal Resource Assessment of Western San Luis Valley, Colorado.” Geothermal Resources. Resource Series. Denver, CO: Colorado Geological Survey, Department of Natural Resources, 1983. https://coloradogeologicalsurvey.org/publications/geothermal-resource-assessments-western-san-luis-valley-colorado.
———. “RS-24 Geothermal Resource Assessment of Ranger Warm Spring, Colorado.” Geothermal Resources. Resource Series. Denver, CO: Colorado Geological Survey, Department of Natural Resources, 1983. https://coloradogeologicalsurvey.org/publications/geothermal-resource-assessment-ranger-warm-springs-colorado.
Zacharakis, Ted G., Charles D. Ringose, and Richard H. Pearl. “RS-15 Geothermal Resource Assessment of Ouray, Colorado.” Geothermal Resources. Resource Series. Denver, CO: Colorado Geological Survey, Department of Natural Resources, 1981. https://coloradogeologicalsurvey.org/publications/geothermal-resource-assessment-ouray-colorado.