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CHL No. 932 Mount Diablo Coal Field - Contra Costa


NO. 932 MOUNT DIABLO COAL FIELD - This was the largest coal-mining district in California from 1860 to 1914, with five towns-Nortonville, Somersville, Stewartsville, Judsonville, and West Hartley-near twelve major mines. Today the towns are gone, their buildings moved to other communities after the mines closed - the East Bay Regional Park District is preserving mine openings, tailings, railroad beds, and a pioneer cemetery.


Black Diamond Mines Regional Park, from State Hwy 4 take Somersville Rd 3.9 mi S, Antioch
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CHL #932 Mount Diablo Coal Field