Repeat photograph of a boat on a beach along the Colorado River in Grand Canyon, 1991

This repeat photograph was taken in 1991 by Dave Edwards, USGS, along the Colorado River, and is a match of a historic image by E.C. LaRue from the 1923 Birdseye Expedition through Grand Canyon. The Birdseye Expedition surveyed a 251-mile stretch of the Colorado River from Lees Ferry to Diamond Creek. The two major goals of the expedition were to locate potential dam sites and create a series of maps and profiles of the area. Emory LaRue was an engineer for the USGS until 1927 and was the Birdseye Expedition hydrologist and photographer. This image is taken at River Mile 74.4 looking upstream on river right at the lower end of Rattlesnake Camp. The 1991 field notes document "major beach erosion and invasion of Tamarix and Salix."  Plant species documented during 1991 are: Acacia greggii, Tamarix, Salix, and Baccharis emoryi. This image was captured at ~10 m above the river on a rock outcropping downstream from the beach, looking upstream and is the second in a series of repeat images at this location in the SBSC's Southwest Repeat Photography Collection, stake (camera point) s0013.