In Lake County, helium exploration underway
A new borehole is being drilled about 15 feet from the site of a 1,800-foot-deep hole that pierced a highly concentrated pocket in 2011.
Source: duluthnewstribune.com
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A new borehole is being drilled about 15 feet from the site of a 1,800-foot-deep hole that pierced a highly concentrated pocket in 2011.