A

FROM 1860 TO 1906, THIS WAS THE LARGEST COAL
MINING DISTRICT IN CALIFORNIA. FIVE TOWNS (NORTONVILLE, 
SOMERSVILLE, STEWARTSVILLE, JUDSONVILLE, AND WEST
HARTLEY) GREW UP AROUND TWELVE MAJOR MINES. TO-
DAY THE TOWNS ARE GONE. THE BUILDINGS HAVING 
BEEN MOVED TO NEARBY COMMUNITIES AFTER THE
MINES CLOSED. MINE OPENINGS, AILINGS, RAILROAD
BEDS, AND A PIONEER CEMETERY ARE BEING PRESERVED 
BY THE EAST BAY REGIONAL PARK DISTRICT