A surface field survey, using a cesium magnetometer, successfully targeted the spatial location of an abandoned buried well casing. Surface excavation exposed the top of the well casing, but attempts to drill out the casing from the surface failed due to the difficulty of keeping the drill bit on-line with the casing. The casing was successfully sealed off by grouting through the ceiling and floor from within the mine.
Neuhauser, Kenneth R. and Redetzke, Daniel J.
"An Applied Geophysical Detection and Subsequent Mitigation of an Abandoned Well Casing Penetrating the Permian Hutchinson Salt at an Undisclosed Kansas Salt Mine,"
The Compass: Earth Science Journal of Sigma Gamma Epsilon:
4, Article 1.
Available at: http://digitalcommons.csbsju.edu/compass/vol85/iss4/1