Boise Project, Boise River Diversion Dam, Across Boise River, Boise, Ada County, ID

Significance: The Boise Diversion Dam and Powerplant are important components in the Boise Project, a Bureau of Reclamation effort to irrigate the Boise and Payette River valleys in Idaho. The diversion dam, completed in 1908, was one of the first Boise Project structures. It directs water into the New York Canal, which carries water throughout Boise Valley. The powerplant, constructed in 1912, initially provided power to construct Arrowrock Dam, and retains much of its original hydroelectric equipment. The dam and powerplant are listed on the National Register of Historic Places for their contributions to the successful development of the Boise Valley and as an example of early twentieth-century hydroelectric engineering.

Survey number: HAER ID-17-A

Building/structure dates: 1911-1912 Initial Construction

Building/structure dates: 1906-1908 Initial Construction

Building/structure dates: 1928 Subsequent Work

Building/structure dates: 1932 Subsequent Work

Building/structure dates: 1963 Subsequent Work

Building/structure dates: 1962 Subsequent Work

Building/structure dates: 1959 Subsequent Work

Building/structure dates: 1965 Subsequent Work

National Register of Historic Places NRIS Number: 76000666

dams irrigation boise hills village boise project boise project diversion dam boise river diversion dam boise river ada ada county idaho headgates powerhouses spillways weirs gates engineering reinforced concrete construction pilasters turbines flumes tailraces governors machinery components generators transformers traveling cranes water power pyramidal roofs stucco houses asbestos siding sheds cottages allis chalmers company bureau of reclamation john h burns abigail christman orville h ensign a d foote clayton fraser elizabeth gales denis gardner general electric roise and company hess historic american engineering record j h lowell david maul minidoka project william s morris payette boise project marjorie pearson charlene roise d w ross frank steunenberg united states reclamation service utah fireproofing company david walsh westinghouse electric and manufacturing company photo ultra high resolution high resolution manufacturing plants construction sites construction power plants power generation library of congress national register of historic places

1969 - 1980

Library of Congress

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