Dwinnell Dam

Historical marker location:

14784 Big Springs Road, Grenada, California

( Marker is on Big Springs Road (County Route A-12 E) near Lake Shore Drive, on the right when traveling south.)

Marker installed: 1973

The Transcontinental Railroad was completed in Promontory Summit, Utah in 1869, but the western terminus of the railroad was actually in Oakland, California. The railroad made it easier and faster to travel across the country, and helped to spur California's economic growth.