This four-box collection contains correspondence, reports, project bids, water rights issues, and papers concerning Dean F. Peterson and Alvin A. Bishop's irrigation and engineering work within Cache Valley during the 1950s and 1960s. Specifically, their work entailed constructing a system that furnished Logan City with a new source for culinary water and building a new city sewer system. This project entailed building canals and pipelines, drilling wells, and organizing a pumping-system to move the city's water. Some of this work took place at the mouth of Logan Canyon, where water was diverted from the Logan River for use in the city's culinary water system.