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