
The northern edge of Antioch gives way to the complex industrial and residential landscape of central Contra Costa County in this mid-century survey. Notable for its documentation of early mining history, the map identifies several historic settlement sites including Somersville, Nortonville, and Stewartville, alongside former extraction points like the Coal Mine Tunnels near West Hartley. These sites sit nestled in the folds of Somerville Canyon and Markley Canyon, reflecting the era's transition from 19th-century resource extraction to a more modern infrastructure.
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9 editions found
1896 · Mt. Diablo
USGS Topo · 1:62,500
1898 · Mt. Diablo
USGS Topo · 1:62,500
1907 · Antioch
USGS Topo · 1:62,500
1908 · Antioch
USGS Topo · 1:62,500
1910 · Jersey
USGS Topo · 1:31,680
1911 · Byron Hot Springs
USGS Topo · 1:31,680
1914 · Brentwood
USGS Topo · 1:31,680
1916 · Lone Tree Valley
USGS Topo · 1:31,680
1916 · Byron Hot Springs
USGS Topo · 1:31,680
1916 · Byron
USGS Topo · 1:62,500