Please contact the responsible office for current information. The Arnold Project, a private development southeast of Bend, Oregon, diverts water from the Deschutes River a short distance above Lava Island Falls for approximately 4,300 acres of irrigable land. Project features include Arnold Diversion Dam, Arnold Flume and Canal, and laterals. Plan Water is diverted from the Deschutes River by Arnold Diversion Dam, and is carried through the Arnold Flume and Canal in an eastward direction. Final delivery to the project lands is made through the lateral system.
Storage is provided in Crane Prairie Reservoir.
Arnold Diversion Dam is of the wing type, extending a short distance into the river from the east bank. The original flume was made of wood, but was replaced with a semicircular steel flume and new concrete headworks by the Bureau of Reclamation. Two shorter wood-built flumes, the Suttong and 0'Donnell, also were replaced. The Suttong Flume was replaced by 710 feet of pretensioned concrete pipe, and the O'Donnell Flume was replaced with a steel pipeline 265 feet long. The main Arnold Canal was originally 17 miles long, but since rehabilitation it has been reduced in length to about 11 miles.