This series is primarily comprised of aerial photographs of the Platte River Basin in Nebraska. The images are in three different formats: film, photographic paper (both 9 x 9 inches), and regular paper. Some of the photos on film have overlays, and there is one folder of separate overlays. Included is a set of photographs printed on paper, extensively annotated as part of an irrigation acreage survey. Materials are arranged alphabetically by folder title.