History

The Utah Frontier Observatory for Geothermal Research (FORGE): a Laboratory for EGS Development. (Joe Moore, Rick Allis, Kristine Pankow, Stuart Simmons, John McLennan, Philip Wannamaker, William Rickard, Robert Podgorney)

Articles submitted to Stanford Geothermal Workshop, 2016

The Geology, Geochemistry, and Hydrology of the EGS FORGE Site, Milford Utah

Stuart Simmons, Stefan Kirby, Clay Jones, Joe Moore, Rick Allis

EGI, University of Utah, 423 Wakara Way, Ste 300, Salt Lake City, Utah
Utah Geological Survey, PO Box 146100, Salt Lake City

e-mail: ssimmons@egi.utah.edu

Enhanced Geothermal System Concept Testing and Development at the Milford, Utah FORGE Site.

Rick Allis, Joe Moore, Stuart Simmons

EGI, University of Utah, 423 Wakara Way, Ste 300, Salt Lake City, Utah
Utah Geological Survey, PO Box 146100, Salt Lake City

The Milford FORGE site, located 16 km northeast of Milford City, Beaver County, and 350 km south of Salt Lake City, is ideal as an EGS field laboratory. The site covers an area of about 25 km² and is underlain by large volumes of granite and gneiss at temperatures in the range of 175 – 225°C at 2 to 4 km depth. A deep exploration well, Acord-1, drilled in 1979 to 3.8 km depth 5 km from the proposed drill site, encountered granite and gneiss at 3.1 km depth and a temperature at total depth of 230°C. The well did not produce fluids and its conductive temperature profile indicates the crystalline rocks at depth are impermeable. Several deep wells are situated between the eastern edge of the FORGE drill site and the 36 MWe Roosevelt Hot Springs geothermal system, located about 4 km to the east. Read More

Geophysical Signatures of the Milford Utah FORGE site

Christian Hardwick, Mark Gwynn, Rick Allis, and Phil Wannamaker

EGI, University of Utah, 423 Wakara Way, Ste 300, Salt Lake City, Utah
Utah Geological Survey, PO Box 146100, Salt Lake City

The Milford FORGE site is situated over Tertiary-Quaternary granitic intrusions that crop out in the Mineral Mountains, and are at 3.1 km depth in the Acord-1 well in the central Milford valley some 10 km west of the mountains. Modeling of the 20 mgal gravity low caused by the basin fill overlying the granite has been carried out using a decreasing density contrast with increasing depth based on Acord-1 geophysical logs. This shows the granite to dip gently down to the west beneath the surficial fan deposits on the western edge of the Mineral Mountains, but this dip increases at about 5 km forming a more localized basin beneath the center of the valley. Read More

References on Roosevelt Hydrothermal System and adjacent Mineral Mountains

Allis, R.G., 2014, Formation pressure as a potential indicator of high stratigraphic permeability: Proceedings, 39th Workshop on Geothermal Reservoir Engineering, Stanford University, 11 p.   https://pangea.stanford.edu/ERE/db/GeoConf/papers/SGW/2014/Allis.pdf

Allis, R.G., Gwynn, M., Hardwick, C., Kirby, S., Moore, J., and Chapman, D., 2015, Re-evaluation of the pre-development thermal regime of Roosevelt Hot Springs geothermal system, Utah: Proceedings, 40th Workshop on Geothermal Reservoir Engineering, Stanford University, 12 p.  http://www.geothermal-energy.org/pdf/IGAstandard/SGW/2015/Allis.pdf

Allis R. G. and Larsen, G., 2012,  Roosevelt Hot Springs Geothermal field, Utah – reservoir response after more than 25 years of power production: Proceedings, 37th Workshop on Geothermal Reservoir Engineering, Stanford University, 8 p.  https://pangea.stanford.edu/ERE/db/GeoConf/papers/SGW/2012/Allis.pdf

Allis, R.G., Moore, J.N., Davatzes, N., Gwynn, M., Hardwick, C., Kirby, S., Pankow, K., Potter, S., and Simmons, S.F., 2016, EGS Concept Testing and Development at the Milford, Utah FORGE Site: Proceedings, 41st Workshop on Geothermal Reservoir Engineering, Stanford University, 13 p.  http://www.geothermal-energy.org/pdf/IGAstandard/SGW/2016/Allis.pdf

Alienikoff, J.N., Nielson, D.L., Hedge, C.E., and Evans, S.H. Jr., Geochronology of Precambrian and Tertiary rocks in the Mineral Mountains, south-central Utah: U.S. Geological Survey Bulletin, 1622, p. 1-12, 1987.  http://pubs.usgs.gov/bul/1622/report.pdf

Anders, M. H., Christie-Blick, N., and Malinverno, A., 2012, Cominco American well: Implications for the reconstruction of the Sevier Orogen and Basin and Range extension in west central Utah. America: Journal of Science, v. 312, p. 508-533.  http://www.ajsonline.org/content/312/5/508

Anders, M. H., Christie-Blick, N., Wills, S., and Krueger, S.W.. 2001, Rock deformation studies in the Mineral Mountains and Sevier Desert of west-central Utah—Implications for upper crustal low-angle normal faulting: Geological Society of America Bulletin, v. 113, no. 7, p. 895-907.  http://gsabulletin.gsapubs.org/content/113/7/895

Arabasz, W., Pechmann J.C., and Burlacu, R., in press, Development of an earthquake catalog and calculation of seismicity rates for the Wasatch Front and surrounding Utah region—Appendix E, inWorking Group on Utah Earthquake Probabilities (WGUEP), Earthquake probabilities for the Wasatch Front region—Utah, Idaho, and Wyoming: Utah Geological Survey Miscellaneous Publication 16-3, p. E1-E126.

Atkinson, D.J., 1981, The Roosevelt Field—new model and geochemical evaluation: Geothermal Resources Council Transactions, v. 5, p. 149-152.  https://www.geothermal-library.org/index.php?mode=pubs&action=view&record=1000757

Ballantyne, G. H., 1978, Hydrothermal alteration at the Roosevelt Hot Springs thermal area, Utah—characterization of rock types and alteration in Getty Oil Company well Utah State 52-21: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 24 p.  http://www.osti.gov/geothermal/biblio/6579521

Ballantyne, J. M., 1978, Hydrothermal alteration at the Roosevelt Hot Springs thermal area, Utah—modal mineralogy, and geochemistry of sericite, chlorite, and feldspar from altered rocks, Thermal Power Company well Utah State 14-2: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 42 p.    http://www.osti.gov/geothermal/biblio/5754229

Ballantyne, J. M., 1980, Geochemistry of sericite and chlorite in well 14-2 Roosevelt Hot Springs geothermal system and in mineralized hydrothermal systems: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, 92 p.  http://www.osti.gov/geothermal/biblio/5285752

Ballantyne, J. M. and Parry, W.T., 1978, Technical report 78-1701-a.1.1, hydrothermal alteration at the Roosevelt Hot Springs thermal area, Utah—petrographic characterization of the alteration to 2 kilometers depth: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 26 p.  http://digitalcommons.usu.edu/govdocs/275/

Bamford, R.W., 1978, Geochemistry of solid materials from two U.S. geothermal systems and its application to exploration: unpublished report prepared by Earth Science Laboratory, University of Utah Research Institute, Salt Lake City, Utah, for, Utah, U.S. Department of Energy, Division of Geothermal Energy, 196 p.  http://www.osti.gov/geothermal/biblio/6779944

Bamford, R.W., 1980, Multielement geochemistry of solid materials in geothermal systems and its applications—part 1, the hot-water system at the Roosevelt Hot Springs KGRA: unpublished report prepared by Earth Science Laboratory, University of Utah Research Institute, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 168 p.  http://www.osti.gov/geothermal/biblio/5197458

Bamford, R.W., Bowman, J.R., Brown, F.H., Cook, K.L., Chapman, D.S., Hohmann, G.W., Nash, W.P., Parry, W.T., Ross, H.P., Sill, W.R., Smith, R.B., Ward, S.H., Whelan, J.A., Wright, P.M., 1977, Geothermal research, Roosevelt Hot Springs KGRA, quarterly progress report, August 1–October 31, 1977: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 30 p.  http://www.osti.gov/geothermal/biblio/896040

Barker, C.A., 1986, Upper-crustal structure of the Milford Valley and Roosevelt Hot Springs, Utah Region—By modeling of seismic refraction and reflection data: Salt Lake City, University of Utah, M.S. thesis.  http://www.worldcat.org/oclc/14865881

Becker D.J., and Blackwell, D, 1983, Gravity and hydrothermal modeling of the Roosevelt Hot Springs area, southwest Utah: Journal of Geophysical Research, v. 98, n. B10, p. 17787-17800.   http://onlinelibrary.wiley.com/doi/10.1029/93JB01231/abstract

Benoit, D., 2013, An empirical injection limitation in fault-hosted Basin and Range geothermal systems: Geothermal Resources Council Transactions, v. 37, p. 887-894.  https://www.geothermal-library.org/index.php?mode=pubs&action=view&record=1030675

Benoit, W.R., and Butler, R.W., 1980, A review of high-temperature geothermal developments in the northern Basin and Range Province: Geothermal Resources Council, Special Report No. 13, p. 57-80.  https://www.geothermal-library.org/index.php?mode=pubs&action=view&record=1005447

Blackett, R.E., 2005, Geothermal Utah, geology, resources and development in the Beehive State: Geothermal Resources Council Bulletin, v. 34, no. 2, p.78‐83.  https://www.geothermal-library.org/index.php?mode=pubs&action=view&record=7004995

Blackett, R. E., 2007, Review of selected geothermal areas in southwestern Utah: Geothermal Resources Council Transactions, v. 31, p. 111-116.   https://www.geothermal-library.org/index.php?mode=pubs&action=view&record=1025203

Blackett, R.E., and Moore, J.N., editors, 1994, Cenozoic geology and geothermal systems of

southwestern Utah: Utah Geological Association Publication 23, 215 p.  http://www.mapstore.utah.gov/uga23.html

Blackett, R.E. and Ross, H.P., 1992, Recent exploration and development of geothermal resources in the Escalante Desert region of southwestern Utah, in Harty, K.M., editor, Engineering geology of southwest Utah: Utah Geological Association Publication 21, p. 261-280.  http://archives.datapages.com/data/uga/data/063/063001/261_ugs630261.htm

Blackwell, D.D. and Chapman, D.S., 1977, Interpretation of geothermal gradient and heat flow data for Basin and Range geothermal systems: Geothermal Resources Council Transactions, v. 1, p. 19-20.  https://www.geothermal-library.org/index.php?mode=pubs&action=view&record=1000007

Bowman, J.R., 1979, Topical report—volume 77-10, stable isotope investigation of fluids and water-rock interaction in the Roosevelt Hot Springs thermal area, Utah: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 18 p.  http://www.osti.gov/geothermal/biblio/5911506

Bowman, J.R., Brown, F.H., Cook, K.L., Nash, W.P., Parry, W.T., Sill, W.R., Smith, R.B., Ward, S.H., Whelan, J.A., 1976, Geothermal research, Roosevelt Hot Springs KGRA, quarterly progress report, August 1–October 31, 1976: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Energy Research and Development Administration, 26 p.    http://www.osti.gov/geothermal/biblio/5665459

Bowman, J.R., Evans, S.H., Jr., Hohmann, W.P., Nash, W.P., Reynolds, G.R., Sill, W.R., and Ward, S.H., 1980,         Management assistance and technical support for the programs in exploration technology, final report for the period December 1, 1978–February 28, 1980: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 41 p.  http://www.osti.gov/geothermal/biblio/6509015

Bowman, J.R. and Rohrs, D.T., 1981, Light-stable-isotope studies of spring and thermal waters from the Roosevelt Hot Springs and Cove Fort/Sulphurdale Thermal areas and of clay minerals from the Roosevelt Hot Springs thermal area: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 36 p.  http://www.osti.gov/geothermal/biblio/5245145

Brown, F.H., 1977, Technical report—volume 77-1, attempt at paleomagnetic dating of opal, Roosevelt Hot Springs KGRA: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Energy Research and Development Administration, 13 p.  http://www.osti.gov/geothermal/biblio/5754238

Brumbaugh, W.D., 1977, Technical report 77-4, gravity survey of the Cove Fort-Sulphurdale KGRA and the north Mineral Mountains area, Millard and Beaver Counties: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Energy Research and Development Administration, 131 p.  http://www.osti.gov/geothermal/biblio/893365

Bruhn, R.L., Yusas, M.R, and Huertas, F., 1982, Technical report volume 77-5, mechanics of low-angle faulting—an example from Roosevelt Hot Springs geothermal area, Utah: Tectonophysics, v. 86, p. 343-361.  http://www.sciencedirect.com/science/article/pii/0040195182901792

Bryant, N. L., and Parry, W.T., 1977, Hydrothermal alteration at Roosevelt Hot Springs KGRA-DDH 1976-1: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Energy Research and Development Administration, 87 p.  http://www.osti.gov/geothermal/biblio/5815782

Buck, W.R., 1989, Flexural rotation of normal faults: Tectonics, v. 7, p. 959-973.  http://ic.ucsc.edu/~casey/eart150/Death%20Valley%20Reading/Buck,1988_Rolling%20Hinge.pdf

Butz, J.R., 1980, A case study of two-phase flow at the Roosevelt Hot Springs, Utah KRGA: Geothermal Resources Council Transactions, v. 4, p. 439-442.  https://www.geothermal-library.org/index.php?mode=pubs&action=view&record=1000622

Butz, J. and Plooster, M., 1979, Final report, subsurface investigations at the Roosevelt KGRA, Utah: unpublished report prepared by Denver Research Institute, University of Denver, Denver Colorado, for U.S. Department of Energy, Department of Geothermal Energy, 73 p.  http://www.osti.gov/scitech/biblio/5592994-lPtGQs/

Capuano, R.M., 1978, Initial investigation of soil mercury geochemistry as an aid to drill site selection in geothermal systems: unpublished report prepared by Earth Science Laboratory, University of Utah Research Institute, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 32 p.  http://www.osti.gov/scitech/biblio/5778808

Capuano, R.M., and Cole, D.R., 1982, Fluid-mineral equilibria in a hydrothermal system, Roosevelt Hot Springs, Utah: Geochimica et Cosmochemica Acta, v. 46, p. 1353-1364. http://www.sciencedirect.com/science/article/pii/001670378290271X

Carlston, K.J., 1982, Electric field ratio telluric survey of the Roosevelt Hot Springs, Utah: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 59 p.  https://www.geothermal-library.org/index.php?mode=pubs&action=view&record=1019328

Carter J.A., and Cook, K.L., 1978, Final report volume 77-11, regional gravity and aeromagnetic surveys of the mineral mountains and vicinity, Millard and Beaver Counties, Utah: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 180 p.  http://www.osti.gov/scitech/biblio/5665404

Christensen, O.D., Moore, J.N., and Capuano, R.M., 1980, Trace element geochemical zoning in the Roosevelt Hot Springs thermal area, Utah: Geothermal Resources Council Transactions, v. 4, p. 149-152.  http://pubs.geothermal-library.org/lib/grc/1000549.pdf

Chu, J.J., 1980, Induced polarization data at Roosevelt Hot Springs geothermal area, Utah: Salt Lake City, University of Utah, M.S. thesis.  http://ngds.egi.utah.edu/files/GL04031/GL04031.pdf

Chu, J.J., Sill, W.R., and Ward, S.H., 1979, Induced polarization measurements at Roosevelt Hot Springs thermal area, Utah: Salt Lake City: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 34 p.  http://www.osti.gov/scitech/biblio/6564250

Clement, M.D., 1981, Heat flow and geothermal assessment of the Escalante Desert, southwestern Utah, with emphasis on the Newcastle KGRA: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 118 p.  http://www.osti.gov/scitech/biblio/6150551

Cochrane, F., Tosaya, C.A., and Owen, J.L., 1988, Evaluation of a site-specific commercial hot dry rock geothermal power prospect: Geothermal Resources Council Transactions, v. 12, p. 375-382.  https://www.geothermal-library.org/index.php?mode=pubs&action=view&record=1001731

Coleman, D.S., and Walker, J.D, 1992, Evidence for the generation of juvenile granitic crust during continental extension, Mineral Mountains batholith, Utah: Journal of Geophysical Research, v. 97, p. 11011-11024.  http://onlinelibrary.wiley.com/doi/10.1029/92JB00653/abstract

Cook, K.L., 1978, Final report—volume 77-9, precision leveling and gravity studies at Roosevelt Hot Springs KGRA, Utah: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 56 p.  http://www.osti.gov/scitech/biblio/5696697

Cook, K.L., 1980, Topical report—detailed gravity and aeromagnetic surveys of the Cove Fort-Sulphurdale KGRA and vicinity, Millard and Beaver Counties, Utah: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy.  http://www.osti.gov/scitech/biblio/7044813

Crebs, T.J. and Cook, K.L., 1976, Technical report—gravity and ground magnetic surveys of the central Mineral Mountains, Utah, volume 6, final report: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City.   http://www.osti.gov/scitech/biblio/7211157

Crecraft, H.R., Nash, W.P., and Evans, S.H., Jr., 1980, Topical report, petrology, geochronology, and chemical evolution of the Twin Peaks rhyolite domes, Utah: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 200 p.  http://www.osti.gov/scitech/biblio/5285924

Dedolph, R.E. and Parry, W.T., 1976, Technical report, volume 76-2, a thermodynamic model of the hydrolysis of microcline in acid sulfate solutions: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Energy Research and Development Administration, 63 p.  http://www.osti.gov/scitech/biblio/5744970

Dickinson, W.R., 2006, Geotectonic evolution of the Great Basin: Geosphere, v. 2, no. 7, p. 353-368.   http://pyrite.utah.edu/fieldtrips/SEGFnevada2009/Readings/Dickenson.pdf

Earll, F.N., 1957, Geology of the central Mineral Range, Beaver Co., Utah—georeferenced map files: Salt Lake City, University of Utah, Ph.D, dissertation, 112 p.  http://content.lib.utah.edu/cdm/ref/collection/etd3/id/1541

East, J., 1981, Hot dry rock geothermal potential of Roosevelt Hot Springs area—review of data and recommendations: unpublished report prepared by Los Alamos National Laboratory, Los Alamos, New Mexico, for U.S. Department of Energy, Division of Geothermal Energy, 46 p.  http://www.osti.gov/geothermal/biblio/6349353

Evans, S.H., Jr., 1980, Summary of potassium/argon age dating, 1979: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 23 p.  http://www.osti.gov/scitech/biblio/5166169

Evans, S.H., Jr. and Nash, W.P., 1978, Final report—volume 77-10, Quaternary rhyolite from the Mineral Mountains, Utah, U.S.A.: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 59 p.  http://www.osti.gov/scitech/biblio/5696814

Evans, S.H., Jr. and Nash, W.P., 1980, Compositional gradients in natural silicic liquids: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 29 p.  http://www.osti.gov/scitech/biblio/6773738

Evans, S.H., Jr. and Nielson, D.L., 1982, Thermal and tectonic history of the Mineral Mountains intrusive complex: Geothermal Resources Council Transactions, v. 6, p. 15-18.  https://www.geothermal-library.org/index.php?mode=pubs&action=view&record=1000906

Faulder, D.D., 1991, Conceptual geologic model and native state model of the Roosevelt Hot Springs hydrothermal system:  Proceedings, 16th Workshop on Geothermal Reservoir Engineering, Stanford University, p. 131-142 1991.  https://pangea.stanford.edu/ERE/pdf/IGAstandard/SGW/1991/Faulder.pdf

Faulder, D.D., 1994, Long term flow test no. 1, Roosevelt Hot Springs: Geothermal Resources Council Transactions, v. 18, p. 583-590.  https://www.geothermal-library.org/index.php?mode=pubs&action=view&record=1007044

Forrest, R.J., 1980, Historical synopsis of the Roosevelt Hot Springs geothermal field, Utah, in Nielson, D.L., editor, Geothermal systems in central Utah, guidebook to field trip number 7, Geothermal Resources Council annual meeting, p. 18-24.

Forrest, R.J., 1994, Geothermal development at Roosevelt Hot Springs geothermal area, Beaver County, Utah, 1972-1993, in Blackett, R.E., and Moore, J.N., editors, Cenozoic geology and geothermal systems of southwest Utah: Utah Geological Association Publication 23, p. 37-44. 1993.  http://archives.datapages.com/data/uga/data/065/065001/37_ugs650037.htm

Frangos, W. and Ward, S.H., 1980, Bipole-dipole survey at Roosevelt Hot Springs thermal area, Beaver County, Utah: unpublished report prepared by Earth Science Laboratory, University of Utah Research Institute, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 51 p.  http://www.osti.gov/scitech/biblio/5050398

Gertson, R.C. and Smith, R.B., 1979, Interpretation of a seismic refraction profile across the Roosevelt Hot Springs, Utah and vicinity: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 120 p.  http://www.osti.gov/scitech/biblio/5814637

Giggenbach, W.F., and Stewart, M.K., 1982, Processes controlling the isotopic compositions of steam and water discharges from steam vents and steam-heated pools in geothermal areas: Geothermics, v. 11, p. 71-80.  https://www.researchgate.net/publication/248522678

Glenn, W.E. and Hulen, J.B., 1979, Interpretation of well log data from four drill holes at Roosevelt Hot Springs KGRA: unpublished report prepared by Earth Science Laboratory, University of Utah Research Institute, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 74 p.  http://www.osti.gov/scitech/biblio/5597946

Glenn, W.E.. Hullen, J.B., and Nielson, D.L., 1980, A comprehensive study of LASL well C/T-2, Roosevelt Hot Springs KGRA, Utah, and applications to geothermal well logging: unpublished report prepared by Los Alamos National Laboratory, Los Alamos, New Mexico, for U.S. Department of Energy, Division of Geothermal Energy, 176 p.  http://www.osti.gov/scitech/biblio/6600607

Goff F. and Decker, E.R., 1983, Candidate sites for future hot dry rock development in the United States: Journal of Volcanology and Geothermal Research, v. 15, p. 187-221.  http://www.sciencedirect.com/science/article/pii/0377027383901002

Gwynn, M., Allis, R., Hardwick C.L., Hill, J., and Moore, J., 2016, A New Look at the Thermal Regime Around Roosevelt Hot Spring, Utah: Proceedings, 41st Workshop on Geothermal Reservoir Engineering, Stanford University, Stanford, CA. https://forge.flame.coe.utah.edu/wp-content/uploads/2017/02/Gwynn-et-al.-2016-GRC-RHS.pdf

Halliday, M.E. and Cook, K.L., 1978, Final report—volume 77-7, gravity and ground magnetic surveys in the Monroe and Joseph KGRA’s and surrounding region, south central Utah: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 164 p. http://www.osti.gov/scitech/biblio/5754069

Hardwick C.L., Gwynn, M., Allis, R., Wannamaker, P., and Moore, J., 2016, Geophysical signatures of the Milford, Utah FORGE site: Proceedings, 41st Workshop on Geothermal Reservoir Engineering, Stanford University, Stanford, CA.  http://www.geothermal-energy.org/pdf/IGAstandard/SGW/2016/Hardwick.pdf

Hintze, L.F. and Davis, F.D., 2003, Geology of Millard County, Utah: Utah Geological Survey Bulletin 133, 305 p.  http://ugspub.nr.utah.gov/publications/bulletins/B-133.pdf

Hintze, L.H., Davis, F.D., Rowley, P.D., Cunningham, C.G., Steven, T.A., and Willis, G.C., 2003, Geologic map of the Richfield 30′ x 60′ quadrangle, southeast Millard County, and parts of Beaver, Piute, and Sevier Counties, Utah: Utah Geological Survey Map 195.  http://ugspub.nr.utah.gov/publications/geologicmaps/30x60quadrangles/M-195Richfield.pdf

Hirtz, P. and Lovekin, J., 1995, Tracer dilution measurements for two-phase geothermal production—comparative testing and operating experience: Geothermal Resources Council Transactions, v. 19, p. 563-568.  https://www.geothermal-library.org/index.php?mode=pubs&action=view&record=1010748

Hohmann, G.W. and Ting, S.C., 1978, Three dimensional magnetotelluric modeling: unpublished report prepared by Earth Science Laboratory University of Utah Research Institute, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 48 p.  http://ngds.egi.utah.edu/files/GL01154/GL01154.pdf

Hulen, J.B., 1978, Stratigraphy and alteration, 15 shallow thermal gradient holes, Roosevelt Hot Springs KGRA and vicinity, Millard and Beaver Counties, Utah: unpublished report prepared by Earth Science Laboratory, University of Utah Research Institute, Salt Lake City, Utah, for U.S. Department of Energy, Division of Geothermal Energy, 59 p.  http://www.osti.gov/scitech/biblio/5598309

James, L.P. and Bamford, R.W., 1977, Final report—volume 77-1, an evaluation of AIRTRACE in the geothermal environment: unpublished report prepared by Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, for U.S. Department of Energy, Energy Research and Development Administration, various pagination.  http://ngds.egi.utah.edu/files/GL01138/GL01138.pdf

Johnson, E.H., 1975, Resistivity and induced polarization survey of a basalt flow in a geothermal environment, western Utah: Salt Lake City, University of Utah, M.S. thesis, 16 p.  http://content.lib.utah.edu/cdm/ref/collection/etd2/id/2260

Katz, L., undated, Seismic emissions study, Roosevelt Hot Springs, Milford, Utah: unpublished report prepared by Seismic Exploration Inc., Salt Lake City, Utah for Getty Oil Company, 7 p.  http://ngds.egi.utah.edu/files/GL04417/GL04417.pdf

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