Little Skull Mountain was at one time being drilled for the MX Missile program's stationary rockets.
In 1983 REECo miners, used a 256-ton tunnel boring machine to drill a 750-foot tunnel into Little Skull Mountain as part of the project. The tunnel was later used by the Air Force to investigate equipment and methods for post-attack "dig-out" from underground missile complexes.
Little Skull Mountain Tunnel (north adit)
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By kjfitz @ 2009-02-08 15:22:02