Mankas Corner and the surrounding agricultural lands of Suisun Valley occupy the southwestern reaches of this survey, where the valley floor meets the steep rise of the Vaca Mountains. The northern terrain is defined by dramatic elevation changes, including Blue Ridge and Signal Hill, interspersed with named canyons like Stone Trough Canyon and Bull Canyon. In the east, the growing suburban landscapes of Fairfield, Suisun City, and Vacaville contrast with the open space of Lagoon Valley and its namesake Lagoon. Water resources are a central theme here, from the northern Lake Curry reservoir to mineral-rich sites such as Tolenas Springs and the winding course of Soda Springs Cr. This 2018 record shows a landscape where high-density residential development in the south and east presses against the established ranching and open space of the northern ridges and canyons.
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1896 · Carquinez Strait
USGS Topo · 1:62,500
1898 · Karquines
USGS Topo · 1:62,500
1901 · Karquines
USGS Topo · 1:62,500
1902 · Napa
USGS Topo · 1:125,000
1907 · Antioch
USGS Topo · 1:62,500
1908 · Vacaville
USGS Topo · 1:62,500
1908 · Antioch
USGS Topo · 1:62,500
1917 · Wolfskill
USGS Topo · 1:31,680
1917 · Elmira
USGS Topo · 1:31,680
1918 · Denverton
USGS Topo · 1:31,680