National Geographic : 1924 Jul
Official Photograph, U.S.Army Air Service BOULDER CANYON OF THE COLORADO IN THE MIDDLE FOREGROUND This view is made looking east, up the Colorado River. Although this canyon is not very long, itisnarrow and high, and the rock formations are such that it offers one of the best dam sites on the Colorado. In the distance, on the left, the Virgin River enters from thenorth. Ifproposed engineering plans materialize, the area in the picture beyond the walls of the canyon will be a tremendous reservoir, 600feet deep and 90miles long. From 250,000 to 500,000 horsepower can be developed for distribution among the people of California,Arizona, Nevada, and Utah.