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Mount Diablo Mining Company
Black Diamond Mine Explosion

Nortonville, Contra Costa County, California
July 24, 1876
No. Killed - 6

In the News
News icon The Morning Press , July 25, 1876
News icon The Solano-Napa News Chronicle, July 25, 1876
Black Diamond Mine Explosion Marker
Location: 37° 57.456′ N, 121° 52.276′ W.
Marker is in Somersville, California, in Contra Costa County.  Marker can be reached from Nortonville Road near Somersville Road.  The plaque is in the Rose Hill Cemetery, plot 50.  The cemetery is part of the Black Diamond Mines Regional Preserve.  Marker is in this post office area: Pittsburg CA 94565
Photographed by Joseph Alvarado
Source: The Historical Marker Database  External Link

Six miners were killed and five were badly injured when a blast ignited coal dust in this mine.

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