Mt. Princeton Geothermal public meeting recap: Magnetotelluric survey, to be completed by the end of the month, does not involve drilling


From The Mountain Mail (Joe Stone):

Fred Henderson and Hank Held of Mt. Princeton Geothermal, LLC, organized the meeting, and Warren Dewhurst provided information about the magnetotelluric survey his company, Dewhurst Group, LLC, will conduct. Held, founder of Mt. Princeton Geothermal, acknowledged the controversial nature of efforts to develop the geothermal resource. He said, “There will continue to be controversy until questions are answered.”

Those questions will not be answered without drilling a deep test well, and Henderson, chief scientist with Mt. Princeton Geothermal, said an investor is interested in drilling a deep well in the area. He said the investor requested the magnetotelluric survey, which, along with shallow temperature measurements, will identify the best place to drill a deep well.

Dewhurst said the survey will be completed before the end of the month, will not involve any drilling and will require at least 100 sites for good results…

Dewhurst said the survey will involve technicians placing five electrodes and two magnetometers on the ground at each site and taking readings for two hours before moving to the next site…

Dewhurst said his company’s technology is capable of modeling subsurface electrical conductivity to 10 kilometers (6 miles) or deeper. It works well for geothermal exploration because geothermal water is an electrical conductor…

More information about the magnetotelluric technology used by Dewhurst Group is at

More geothermal coverage here and here.

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