
Del Valle Regional Park dominates the northwestern portion of this 1996 update, where the reservoir waters are framed by the steep slopes of Wauhab Ridge and Crane Ridge. This landscape in eastern Alameda County is defined by its water management and transit infrastructure, most notably the path of the Hetch Hetchy Aqueduct and the presence of several isolated mountain flats. The settlement at Mendenhall Springs and high-altitude clearings like Shafer Flat and Rose Flat indicate a history of upland ranching or seasonal habitation.
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This is the sole edition of this map. No revisions or reprints were ever made.
1889 · San Jose
USGS Topo · 1:62,500
1897 · San Jose
USGS Topo · 1:62,500
1897 · Mt. Hamilton
USGS Topo · 1:62,500
1899 · San Jose
USGS Topo · 1:62,500
1906 · Pleasanton
USGS Topo · 1:62,500
1907 · Tesla
USGS Topo · 1:62,500
1916 · Midway
USGS Topo · 1:31,680
1941 · Pleasanton
USGS Topo · 1:62,500
1942 · Mt. Hamilton
USGS Topo · 1:62,500
1942 · Altamont
USGS Topo · 1:62,500