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Kofoed, V., Jessop M., Wallace M., 2014. Investigating seepage at the Bartley dam, UK, Hydropower & Dams Issue Four, 2014.
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Wallace, M.J., Montgomery, J.R., Kofoed, V.O., Jessop, M.L, 2009. Seepage diagnosis of earthen embankments with controlled source audio frequency domain magnetics (CS-AFD-M), SEG Technical Program Expanded Abstracts 2009: pp. 1355-1359.
System for detecting a location of a subsurface channel
Patent number: 9588247
Abstract: A system for detecting a location of a subsurface channel may include a portable frame and a plurality of magnetic coils supported by the frame. The magnetic coils may be spaced apart from one another and ends of each of the magnetic coil are unobstructed by other of the magnetic coils.
Filed: February 27, 2013
Date of Patent: March 7, 2017
Assignee: Willowstick Technologies, LLC
Inventors: Val O. Kofoed, Jerry R. Montgomery, Rondo N. Jeffery, N. Rich Montgomery, Michael L. Jessop, Michael J. Wallace, Benjamin A. Christensen
Subsurface hydrogeologic system modeling
Patent number: 8688423
Abstract: A method of modeling a subsurface hydrogeologic system within a study area can include applying an electric current directly to the subsurface hydrogeologic system and monitoring a magnetic field generated by the electric current in the subsurface hydrogeologic system. An electric current distribution can be identified within the study area by an inversion process based on the magnetic field. A model of the electric current distribution can be created.
Filed: January 31, 2012
Date of Patent: April 1, 2014
Assignee: Willowstick Technologies, LLC
Inventors: Michael L. Jessop, Michael J. Wallace, Wei Qian, Jerry R. Montgomery, Rondo Jeffery, Val O. Kofoed