Abstract The USU Irrigation Engineering Photograph Collection consists of 2,808 color slides, black and white negatives, and black and white photographs from projects and studies relating to irrigation but also a variety of water issues such as cloud seeding, ice encasement, salinity, water conservation, and drought studies. Most of the images are from Cache Valley but there are also images from throughout Utah. Also included are images of dams and irrigation projects in Montana, New Mexico, Idaho,...