7/18/2015
7/18/2015
7/18/2015
7/18/2015
Landmark information
- Location:
Black Diamond Mines Regional Park; from Hwy 4 take Somersville Rd 3.9 mi S, Antioch - Plaque:
Official State Plaque - Site:
Existing - Date First Visited:
4/13/1997 - Date Most Recently Visited:
7/18/2015 - GPS Coordinates:
N 37 57.490, W 121 51.790 - Other Designations:
National Register of Historic Places
About this landmark
Plaque text:
Mount Diablo Coal Field
From 1860 to 1906, this area was the largest coal mining district in California. Five towns (Nortonville, Somersville, Stewartsville, Judsonville, and West Hartley) grew up around twelve major mines. Today the towns are gone, the buildings having been moved to nearby communities after the mines closed. Mine openings, tailings, railroad beds, and a pioneer cemetery are being preserved by the East Bay Regional Park District.