Granite Mountain/Speculator Mine Disaster
The Granite Mountain/Speculator Mine disaster near Butte, Montana, began a little before midnight on June 8, 1917, as the result of a tragic but ironic accident. The North Butte Mining Company planned to install a sprinkler system in the 3,500-foot shaft of Granite Mountain to increase safety. The system was nearly complete when one of the last steps …
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