General map of a survey in California : in connection with examinations for railroad routes to the Pacific Ocean /

Map shows "practicable railway routes" between Ft. Yuma on the Colorado River and the San Francisco Bay region.
Scale 1:600,000.
Relief shown by hachures.
"Proof revised in Office of P.R.R. Surveys Feb. 10th 1855. All copies printed prior to this date contain errors. G. K. Warren, Lt. Topl. Engrs."
LC Railroad maps, 157
Description derived from published bibliography.
Available also through the Library of Congress Web site as a raster image.