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2018 Map of Antioch South

Name: 2018 Topographic Map of Antioch South
Creator: U.S. Geological Survey
Published: 2018
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2018

About this map

The northern reaches of the Diablo Range meet the edge of the San Joaquin Valley in this 2018 survey, documenting a region defined by its industrial past and suburban present. Notable remnants of early coal mining operations are visible in the hills south of Antioch, particularly the Coal Mine Tunnels and the sites of former mining communities like Somersville, Stewartville, and West Hartley. These settlements, along with Rose Hill Cem, provide a spatial record of the Mount Diablo Coalfield's nineteenth-century heyday.

Modern water infrastructure is prominently mapped, including the Mokelumne Aqueduct and the Contra Costa Canal which feed the Contra Loma Reservoir. To the south, the landscape transitions into a series of valleys such as Briones Valley and Horse Valley, alongside the recreational grounds of Marsh Creek Springs. The map documents the interface of the expanding residential footprints of Pittsburg, Brentwood, and Oakley against the persistent terrain of Perkins Canyon and Dark Canyon.