An image of Parker Dam on the Colorado River at the California-Arizona border, 155 miles downstream from Hoover Dam. Note: Boulder Dam was officially renamed Hoover Dam in 1947.
From the Howard Cannon Photograph Collection (PH-00192). Stamped on verso: "Edward J. Allen Associates, INC. Nevadas Largest Photographic Organization P.O. Box 4253 - Las Vegas Nevada 89106"