
The Santa Clara River valley and the surrounding Santa Susana Mountains define a landscape transitioning from agricultural ranching to heavy petroleum extraction during the early 1940s. The region is dotted with numerous family-held and institutional properties such as the Hathaway Ranch, Newhall Ranch, and the Wayside Honor Farm. Significant industrial activity is concentrated in the Oak Canyon Oil Field and Newhall-Potrero Oil Field, reflecting the era's intensive resource development.
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1894 · Los Angeles
USGS Topo · 1:62,500
1896 · Santa Monica
USGS Topo · 1:62,500
1898 · Santa Monica
USGS Topo · 1:62,500
1900 · Los Angeles
USGS Topo · 1:62,500
1900 · Fernando
USGS Topo · 1:62,500
1900 · Triunfo Pass
USGS Topo · 1:62,500
1900 · Piru
USGS Topo · 1:62,500
1901 · Southern California Sheet No. 1
USGS Topo · 1:250,000
1902 · Santa Monica
USGS Topo · 1:62,500
1903 · Calabasas
USGS Topo · 1:62,500