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Arizona’s Geothermal Resources
While geothermal resources are not as recognized in Arizona as they are
in other western states, several locations have promise—even for electrical
generation—and even more exists have potential for direct use applications.
The GeoPowering the West initiative of the US Department of Energy recently
published a new map of geothermal resources in Arizona. The data behind
this map come in part from a geothermal database of thermal wells or springs
prepared by James Witcher. This report reports that almost all of Arizona
wells and springs found at elevations below 1,524 m mean-sea level (5,000
feet) exceed 20°C. That is, all the wells in this location produce
warm water.
Figure 22 - Overview of Arizona's Geothermal Regions. The dots
represent hot springs. The coldest areas in the center of the state
are on the Colorado Plateau. Source: US Department of Energy.
Prepared at INEEL by Patrick Laney and Julie Brizzee. For this and
other western geothermal maps, see: http://geothermal.id.doe.gov/maps-software.shtml
Even a quick look at this new map reveals that most thermal wells occur
in the southern part of the state, that is, south of the Colorado Plateau,
where many irrigation wells tap deep-seated aquifers that are overlain by
thermally-insulating sediments in highly-developed agricultural areas. As
Witcher points out, these thermal fluids are more valued for irrigation
of field crops, municipal water supply and industrial uses than for the
heat carried by the waters, but the potential does exist for other applications.
Currently, Arizona has two direct uses of geothermal, recreational hot springs
and aquaculture. There is considerable potential for direct-heat utilization
in the agricultural sector, spas, district heating, resorts, especially
where resource and existing users coexist. The following is a listing of
several of these locations by county.
Cochise County
McNeal
Latitude: 31.5506
Longitude: 109.625
Population: 120
Resource Temperature: 53.9°C (129°F)
Remarks: 1 well. Located within 5 miles of McNeal.
San Simon
Latitude: 32.2708
Longitude: 109.2625
Population: 519
Resource Temperature: 134°C (273.2°F)
Remarks: 1 well. Located within 3 miles of San Simon.
Sierra Vista
Latitude: 31.4719
Longitude: 110.3522
Population: 37300
Resource Temperature: 68°C (154.4°F)
Remarks: 6 wells. Located within 5 miles of Sierra Vista.
Graham County
Pima / Glenbar
Latitude: 32.9147
Longitude: 109.8397
Population: 1725
Resource Temperature: 59°C (138.2°F)
Remarks: 1 well. Located within 2 miles of Pima.
Greenlee County
Clifton
Latitude: 33.0800
Longitude: 109.3022
Population: 2840
Resource Temperature: 71°C (159.8°F)
Remarks: 2 springs. Located within 3 miles of Clifton. Potential exists
for immediate temperatures of 100 to 150°C.
Guthrie
Latitude: 32.9736
Longitude: 109.3494
Population: Rural
Resource Temperature: 84°C (183.2°F)
Remarks: 1 spring. Located within 5 miles of Guthrie. Potential exists
for immediate temperatures of 100 to 150°C.
Maricopa County
Avondale
Latitude: 33.4256
Longitude: 112.3628
Population: 17595
Resource Temperature: 50°C (122°F)
Remarks: 1 well. Located within 0.5 miles of Avondale.
Litchfield Park
Latitude: 33.4964
Longitude: 112.3742
Population: 3303
Resource Temperature: 56.1°C (133°F)
Remarks: 3 wells. Located within 5 miles of Litchfield Park.
Mesa
Latitude: 33.4181
Longitude: 111.6897
Population: 310800
Resource Temperature: 54.4°C (129.9°F)
Remarks: 1 well. Located within 0.5 miles of Mesa.
Perryville
Latitude: 33.4497
Longitude: 112.4858
Population: Rural
Resource Temperature: 75°C (167°F)
Remarks: 1 well. Located within 3 miles of Perryville.
Pima County
Tucson
Latitude: 32.1525
Longitude: 110.8861
Population: 435400
Resource Temperature: 52.2°C (126°F)
Remarks: 1 well. Located within 4 miles of Tucson.
Pinal County
Coolidge
Latitude: 32.9311
Longitude: 111.5500
Population: 6927
Resource Temperature: 71.7°C (161.1°F)
Remarks: 8 wells. Located within 5 miles of Coolidge.
Yavapai County
Morristown
Latitude: 33.9856
Longitude: 112.3597
Population: 400
Resource Temperature: 55.4°C (131.7°F)
Remarks: 1 spring. Located within 1 mile of Morristown.
Yuma County
Wellton / Roll
Latitude: 32.7403
Longitude: 114.0686
Population: 1066
Resource Temperature: 60°C (140°F)
Remarks: 1 spring. Located within 5 miles of Wellton and 3 miles of Roll.
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