Thermal Gradient and Heat Flow Drilling, Volume 5, Final Report

During the summer of 1975, the Department of Geology and Geophysics drilled nine drill thermal gradient/heat flow holes. Total footage drilled was 2125 feet. Seven holes were drilled with a Mayhew 1000 drill using various combinations of down the hole hammer drilling, rotary drilling, and NX diamond core drilling. Three of these were heat flow holes--one in the Mineral Range, one in the Tushar Range near Beaver, Utah, and one near Monroe, Utah. Two were alteration study holes in the Roosevelt KGRA and two were temperature gradient holes, in alluvium in the Roosevelt KGRA. The average depth of the holes drilled with the Mayhew 1000 drill was 247 feet. Holes ranged from 135 feet to 492 feet. Cost per foot averaged $18.53. Two holes were core drilled with a Joy 12, BX-size drill. One was to 75 feet, in perlite. This hole was abandoned. The other was to 323 feet in granite.

Data and Resources

Metadata Source

Additional Info

Field Value
Citation Date 1977-01-01T00:00:00

Harvest Information

Original ID 8B73CE4D0E214F57864C938547EA05D9
Index Date 2016-03-17T21:03:22
Original Format ISO-USGIN
Original Version 1.2


Name Whelan, J.A.
Organization Geo-Heat Center, Oregon Institute of Technology, Klamath Falls, OR (USA)

Geographic Extent

North Bound 42.001618
South Bound 36.9979031
East Bound -114.0529979
West Bound -109.0410581