This one-box collection contains the papers of Joseph Jeppe Larsen and spans the period of 1888 to 1976. Larsen's papers consist of correspondence (1910-1947), meeting minutes of the Newton Irrigation Company (1907-1945) and the West Cache Grain Growers Association (1935-1945), various papers concerning the Newton Project, and other papers. The bulk of this collection revolves around Larsen's agricultural endeavors in Newton and interactions with the Newton Irrigation Company. The majority of Larsen's correspondence consists of outgoing letters contained in three carbon-copy ledgers which contain approximately 300 hundred letters written during the 1907-1922 period. These letters primarily concern his work with the Newton Irrigation Company. This correspondence, the meeting minutes of the Newton Irrigation Company, and other papers contained in this collection document Newton's agricultural economy prior to and during the Agricultural Depression of the 1920s, during the Great Depression of the 1930s, and into the post-World War II era with a high level of detail. Larsen's papers also contain numerous sources of information about the Newton Project, a 1941 reclamation project aimed to overhaul the Newton Reservoir and construct irrigation canals in the Newton area.