P-12-200-4261 NA Klamath Project, California-Oregon. The feature regulates flow from the Upper Klamath Lake Reservoir. It is a principal source of water supply for the project. The dam is a reinforced concrete slab type structure 22 feet high and has a crest length of 435 feet. The reservoir has a capacity of 873,000 acre-feet and is operated by the Pacific Power and Light Company, subject to Klamath Project rights; June 23, 1978; Bureau of Reclamation photo by J. C. Dahilig