South Flont Street (House), Wickenburg, Maricopa County, AZ
Survey number: HABS AZ-54 Public domain photograph - historical image of Arizona, United States, free to use, no copyright restrictions image - Picryl description
Member of the Arizona part-time farms milking. Chandler Unit, Maricopa...
Title and other information from caption card. Transfer; United States. Office of War Information. Overseas Picture Division. Washington Division; 1944. More information about the FSA/OWI Collection is availabl... More
Municipal band shell seen from the golf course. Phoenix, Arizona
Title and other information from caption card. Transfer; United States. Office of War Information. Overseas Picture Division. Washington Division; 1944. More information about the FSA/OWI Collection is availabl... More
Interior of United Producers and Consumers Cooperative Store at Phoeni...
Title and other information from caption card. Transfer; United States. Office of War Information. Overseas Picture Division. Washington Division; 1944. More information about the FSA/OWI Collection is availabl... More
Bartlett Dam, Verde River, Phoenix, Maricopa County, AZ
Significance: Bartlett Dam was the first multiple arch dam constructed by the Bureau of Reclamation. It was also the highest multiple arch dam constructed in the United States at the time of its completion. Su... More
Bartlett Dam, Verde River, Phoenix, Maricopa County, AZ
Significance: Bartlett Dam was the first multiple arch dam constructed by the Bureau of Reclamation. It was also the highest multiple arch dam constructed in the United States at the time of its completion. Su... More
Bartlett Dam, Verde River, Phoenix, Maricopa County, AZ
Significance: Bartlett Dam was the first multiple arch dam constructed by the Bureau of Reclamation. It was also the highest multiple arch dam constructed in the United States at the time of its completion. Su... More
Bartlett Dam, Verde River, Phoenix, Maricopa County, AZ
Significance: Bartlett Dam was the first multiple arch dam constructed by the Bureau of Reclamation. It was also the highest multiple arch dam constructed in the United States at the time of its completion. Su... More
San Francisco Canal, Between Fortieth & Weir & Thirty-sixth Street & R...
Survey number: HAER AZ-8 Building/structure dates: 1871 Initial Construction
San Francisco Canal, Between Fortieth & Weir & Thirty-sixth Street & R...
Survey number: HAER AZ-8 Building/structure dates: 1871 Initial Construction
Ash Avenue Bridge, Spanning Salt River at Foot of Ash Avenue, Tempe, M...
Significance: Constructed over the Salt River on the Pheonix-Tempe Highway, the Ash Avenue Bridge is the first concrete multi-arch bridge erected in Arizona. The structure is comprised of eleven spans of two-ri... More
Ash Avenue Bridge, Spanning Salt River at Foot of Ash Avenue, Tempe, M...
Significance: Constructed over the Salt River on the Pheonix-Tempe Highway, the Ash Avenue Bridge is the first concrete multi-arch bridge erected in Arizona. The structure is comprised of eleven spans of two-ri... More
Ash Avenue Bridge, Spanning Salt River at Foot of Ash Avenue, Tempe, M...
Significance: Constructed over the Salt River on the Pheonix-Tempe Highway, the Ash Avenue Bridge is the first concrete multi-arch bridge erected in Arizona. The structure is comprised of eleven spans of two-ri... More
Crosscut Steam Plant, Indian Bend Pond & Pump Ditch, North side Salt R...
Survey number: HAER AZ-20-B Public domain photograph - historical image of Arizona, United States, free to use, no copyright restrictions image - Picryl description
Crosscut Steam Plant, Indian Bend Pond & Pump Ditch, North side Salt R...
Survey number: HAER AZ-20-B Public domain photograph - historical image of Arizona, United States, free to use, no copyright restrictions image - Picryl description
Phoenix Indian School, Dining Hall, Northeast Corner of Central Avenue...
Significance: The Dining Hall is the oldest surviving major structure on the site of the Phoenix Indian School. In addition, not only was it the first structure at the School to employ Mission Revival style, i... More
Rose Pauson House (Ruins), Thirty-Second Street, Phoenix, Maricopa Cou...
Significance: The Pauson House was designed by Frank Lloyd Wright and completed in 1940. Three photographs and two floor plans of the house were published in Henry-Russel Hitchcock's "In the Nature of Material... More
Rose Pauson House (Ruins), Thirty-Second Street, Phoenix, Maricopa Cou...
Significance: The Pauson House was designed by Frank Lloyd Wright and completed in 1940. Three photographs and two floor plans of the house were published in Henry-Russel Hitchcock's "In the Nature of Material... More
Waddell Dam, On Agua Fria River, 35 miles northwest of Phoenix, Phoeni...
Significance: It is the only storage dam constructed by private interests in central Arizona. It became the largest multiple arch dam in the world upon completion. Survey number: HAER AZ-11 Building/structure... More
Waddell Dam, On Agua Fria River, 35 miles northwest of Phoenix, Phoeni...
Significance: It is the only storage dam constructed by private interests in central Arizona. It became the largest multiple arch dam in the world upon completion. Survey number: HAER AZ-11 Building/structure... More
Waddell Dam, On Agua Fria River, 35 miles northwest of Phoenix, Phoeni...
Significance: It is the only storage dam constructed by private interests in central Arizona. It became the largest multiple arch dam in the world upon completion. Survey number: HAER AZ-11 Building/structure... More
Waddell Dam, On Agua Fria River, 35 miles northwest of Phoenix, Phoeni...
Significance: It is the only storage dam constructed by private interests in central Arizona. It became the largest multiple arch dam in the world upon completion. Survey number: HAER AZ-11 Building/structure... More
Waddell Dam, On Agua Fria River, 35 miles northwest of Phoenix, Phoeni...
Significance: It is the only storage dam constructed by private interests in central Arizona. It became the largest multiple arch dam in the world upon completion. Survey number: HAER AZ-11 Building/structure... More
Waddell Dam, On Agua Fria River, 35 miles northwest of Phoenix, Phoeni...
Significance: It is the only storage dam constructed by private interests in central Arizona. It became the largest multiple arch dam in the world upon completion. Survey number: HAER AZ-11 Building/structure... More
Waddell Dam, On Agua Fria River, 35 miles northwest of Phoenix, Phoeni...
Significance: It is the only storage dam constructed by private interests in central Arizona. It became the largest multiple arch dam in the world upon completion. Survey number: HAER AZ-11 Building/structure... More
Waddell Dam, On Agua Fria River, 35 miles northwest of Phoenix, Phoeni...
Significance: It is the only storage dam constructed by private interests in central Arizona. It became the largest multiple arch dam in the world upon completion. Survey number: HAER AZ-11 Building/structure... More
Theodore Roosevelt Dam, Transformer House, Salt River, Tortilla Flat, ...
Survey number: HAER AZ-6-B Building/structure dates: 1908 Initial Construction National Register of Historic Places NRIS Number: 100001454
Theodore Roosevelt Dam, Transformer House, Salt River, Tortilla Flat, ...
Survey number: HAER AZ-6-B Building/structure dates: 1908 Initial Construction National Register of Historic Places NRIS Number: 100001454
Western Canal, South side of Salt River between Tempe, Phoenix & Mesa,...
Significance: The Western Canal expanded the irrigable acreage of the Salt River Project; constructed partly by the Reclamation Service and partly by the landowners to be served; supplied water to the Highline ... More
Phoenix Indian School, Elementary School, Northeast Corner of Central ...
Significance: The Elementary School was an example of Moderne style institutional building. Its combination of stucco finish with brick trim and three-part compositions on each facade was totally characteristi... More
Horse Mesa Dam, Salt River, 65 miles East of Phoenix, Phoenix, Maricop...
Significance: It was the second dam constructed under the Salt River Project's hydroelectric expansion program in the 1920s. Survey number: HAER AZ-15 Building/structure dates: 1927 Initial Construction Nati... More
Horse Mesa Dam, Salt River, 65 miles East of Phoenix, Phoenix, Maricop...
Significance: It was the second dam constructed under the Salt River Project's hydroelectric expansion program in the 1920s. Survey number: HAER AZ-15 Building/structure dates: 1927 Initial Construction Nati... More
Horse Mesa Dam, Salt River, 65 miles East of Phoenix, Phoenix, Maricop...
Significance: It was the second dam constructed under the Salt River Project's hydroelectric expansion program in the 1920s. Survey number: HAER AZ-15 Building/structure dates: 1927 Initial Construction Nati... More
Horse Mesa Dam, Salt River, 65 miles East of Phoenix, Phoenix, Maricop...
Significance: It was the second dam constructed under the Salt River Project's hydroelectric expansion program in the 1920s. Survey number: HAER AZ-15 Building/structure dates: 1927 Initial Construction Nati... More
Arizona Eastern Railroad Bridge, Spanning Salt River, Tempe, Maricopa ...
Significance: Longest-standing railroad bridge at a location notorious for flood damage; last remaining railroad bridge in Tempe. Nine-span Pratt truss style illustrates evolution of bridge engineering of the e... More
County-City Administration Building, Washington Street, Phoenix, Maric...
Significance: The building derives its significance as an example of twentieth century architecture in which the current tastes (art deco) are combined with details intended to evoke the native American inhabit... More
Cross Cut Hydro Plant, North Side of Salt River, Tempe, Maricopa Count...
Significance: This was the largest low-head hydro plant in the SRP system. From about 1915 to 1938, it represented a large percentage of the SRP generating capacity. Survey number: HAER AZ-30 Building/structu... More
Cross Cut Hydro Plant, North Side of Salt River, Tempe, Maricopa Count...
Significance: This was the largest low-head hydro plant in the SRP system. From about 1915 to 1938, it represented a large percentage of the SRP generating capacity. Survey number: HAER AZ-30 Building/structu... More
Cross Cut Hydro Plant, North Side of Salt River, Tempe, Maricopa Count...
Significance: This was the largest low-head hydro plant in the SRP system. From about 1915 to 1938, it represented a large percentage of the SRP generating capacity. Survey number: HAER AZ-30 Building/structu... More
Cross Cut Hydro Plant, North Side of Salt River, Tempe, Maricopa Count...
Significance: This was the largest low-head hydro plant in the SRP system. From about 1915 to 1938, it represented a large percentage of the SRP generating capacity. Survey number: HAER AZ-30 Building/structu... More
Gillespie Dam Bridge, Spanning Gila River on Old US 80 Highway, south ...
Significance: Prior to completion of this bridge in 1927, traffic on the Pikes Peak Ocean-to-Ocean Highway at this point was often halted by flooding on the Gila River. The Gillespie Dam Bridge was this strateg... More
Tempe Canal, South Side Salt River in Tempe, Mesa & Phoenix, Tempe, Ma...
Significance: The oldest canal in continuous use in the Salt River Valley; site of early hydropower projects; the last independent canal company to join the Salt River Project. Survey number: HAER AZ-16 Build... More
Verde River Sheep Bridge, Spanning Verde River (Tonto National Forest)...
Significance: In 1943, Dr. R.O. Raymond, a physician and sheep rancher from Flagstaff, Arizona, sponsored the construction of Verde River Sheep Bridge on grazing allotment granted to his Flagstaff Sheep Company... More
Verde River Sheep Bridge, Spanning Verde River (Tonto National Forest)...
Significance: In 1943, Dr. R.O. Raymond, a physician and sheep rancher from Flagstaff, Arizona, sponsored the construction of Verde River Sheep Bridge on grazing allotment granted to his Flagstaff Sheep Company... More
Verde River Sheep Bridge, Spanning Verde River (Tonto National Forest)...
Significance: In 1943, Dr. R.O. Raymond, a physician and sheep rancher from Flagstaff, Arizona, sponsored the construction of Verde River Sheep Bridge on grazing allotment granted to his Flagstaff Sheep Company... More
Highline Canal & Pumping Station, South side of Salt River between Tem...
Significance: The Highline Canal expanded the irrigable acreage of the Salt River Project. The pumping plant was the only surface water canal pump on the project. Survey number: HAER AZ-23 Building/structure ... More
Arizona Biltmore, Bathhouse & Cabanas, Northeast Corner, Twenty-fourth...
Significance: The original bathhouse and cabanas at the Arizona Biltmore Hotel are important to recognize for three main reasons. First, they are an important amenity of the classic winter resort of the Salt R... More
Arizona Biltmore, Bathhouse & Cabanas, Northeast Corner, Twenty-fourth...
Significance: The original bathhouse and cabanas at the Arizona Biltmore Hotel are important to recognize for three main reasons. First, they are an important amenity of the classic winter resort of the Salt R... More
Crosscut Steam Plant, North side Salt River near Mill Avenue & Washing...
Significance: The diesel plant housed unique large engines; both the diesel and steam units provided power to the cities of the Salt River Valley during WWII and the very high growth period following. The pump ... More
Crosscut Steam Plant, North side Salt River near Mill Avenue & Washing...
Significance: The diesel plant housed unique large engines; both the diesel and steam units provided power to the cities of the Salt River Valley during WWII and the very high growth period following. The pump ... More
Crosscut Steam Plant, North side Salt River near Mill Avenue & Washing...
Significance: The diesel plant housed unique large engines; both the diesel and steam units provided power to the cities of the Salt River Valley during WWII and the very high growth period following. The pump ... More
3320 North Central Avenue (House), 3320 North Central Avenue, Phoenix,...
Survey number: HABS AZ-33 Public domain photograph of a house, residential property, free to use, no copyright restrictions image - Picryl description
Rosson House, 139 North Sixth Street, Phoenix, Maricopa County, AZ
Further research indicated the house was incorrectly identified as the Rosens House. It was corrected to the Rosson House. Survey number: HABS AZ-37 National Register of Historic Places NRIS Number: 71000112
Wife of migratory agricultural laborer and daughter hanging up the was...
Title and other information from caption card. Transfer; United States. Office of War Information. Overseas Picture Division. Washington Division; 1944. More information about the FSA/OWI Collection is availabl... More
Chicken shelter on the Arizona part-time farms, Chandler Unit. Maricop...
Title and other information from caption card. Transfer; United States. Office of War Information. Overseas Picture Division. Washington Division; 1944. More information about the FSA/OWI Collection is availabl... More
Detail of a main irrigation ditch in Maricopa County, Arizona
Title and other information from caption card. Transfer; United States. Office of War Information. Overseas Picture Division. Washington Division; 1944. More information about the FSA/OWI Collection is availabl... More
A black and white photo of a river. Great Depression FFSA / OWI Negati...
Picryl description: Public domain photograph of a road works, construction, excavation, free to use, no copyright restrictions.
Orchestra playing outside a grocery store on Saturday afternoon which ...
Title and other information from caption card. Transfer; United States. Office of War Information. Overseas Picture Division. Washington Division; 1944. More information about the FSA/OWI Collection is availabl... More
Children at the FSA (Farm Security Administration) Camelback Farms, Ph...
Title and other information from caption card. Transfer; United States. Office of War Information. Overseas Picture Division. Washington Division; 1944. More information about the FSA/OWI Collection is availabl... More
Phoenix, Arizona. Camelback Farms, FSA (Farm Security Administration) ...
Title and other information from caption card. Transfer; United States. Office of War Information. Overseas Picture Division. Washington Division; 1944. More information about the FSA/OWI Collection is availabl... More
Bartlett Dam, Verde River, Phoenix, Maricopa County, AZ
Significance: Bartlett Dam was the first multiple arch dam constructed by the Bureau of Reclamation. It was also the highest multiple arch dam constructed in the United States at the time of its completion. Su... More
Bartlett Dam, Verde River, Phoenix, Maricopa County, AZ
Significance: Bartlett Dam was the first multiple arch dam constructed by the Bureau of Reclamation. It was also the highest multiple arch dam constructed in the United States at the time of its completion. Su... More
Bartlett Dam, Verde River, Phoenix, Maricopa County, AZ
Significance: Bartlett Dam was the first multiple arch dam constructed by the Bureau of Reclamation. It was also the highest multiple arch dam constructed in the United States at the time of its completion. Su... More
Bartlett Dam, Verde River, Phoenix, Maricopa County, AZ
Significance: Bartlett Dam was the first multiple arch dam constructed by the Bureau of Reclamation. It was also the highest multiple arch dam constructed in the United States at the time of its completion. Su... More
Bartlett Dam, Verde River, Phoenix, Maricopa County, AZ
Significance: Bartlett Dam was the first multiple arch dam constructed by the Bureau of Reclamation. It was also the highest multiple arch dam constructed in the United States at the time of its completion. Su... More
Bartlett Dam, Verde River, Phoenix, Maricopa County, AZ
Significance: Bartlett Dam was the first multiple arch dam constructed by the Bureau of Reclamation. It was also the highest multiple arch dam constructed in the United States at the time of its completion. Su... More
San Francisco Canal, Between Fortieth & Weir & Thirty-sixth Street & R...
Survey number: HAER AZ-8 Building/structure dates: 1871 Initial Construction
San Francisco Canal, Between Fortieth & Weir & Thirty-sixth Street & R...
Survey number: HAER AZ-8 Building/structure dates: 1871 Initial Construction
Phoenix Indian School, Dairy-Milking Shed, Northeast Corner of Central...
Significance: The Dairy is one of the two buildings remaining from the earliest phase of building on the site, and is one of the last surviving records of the vocational training activities on the site that pre... More
Ash Avenue Bridge, Spanning Salt River at Foot of Ash Avenue, Tempe, M...
Significance: Constructed over the Salt River on the Pheonix-Tempe Highway, the Ash Avenue Bridge is the first concrete multi-arch bridge erected in Arizona. The structure is comprised of eleven spans of two-ri... More
Ash Avenue Bridge, Spanning Salt River at Foot of Ash Avenue, Tempe, M...
Significance: Constructed over the Salt River on the Pheonix-Tempe Highway, the Ash Avenue Bridge is the first concrete multi-arch bridge erected in Arizona. The structure is comprised of eleven spans of two-ri... More
Ash Avenue Bridge, Spanning Salt River at Foot of Ash Avenue, Tempe, M...
Significance: Constructed over the Salt River on the Pheonix-Tempe Highway, the Ash Avenue Bridge is the first concrete multi-arch bridge erected in Arizona. The structure is comprised of eleven spans of two-ri... More
Ash Avenue Bridge, Spanning Salt River at Foot of Ash Avenue, Tempe, M...
Significance: Constructed over the Salt River on the Pheonix-Tempe Highway, the Ash Avenue Bridge is the first concrete multi-arch bridge erected in Arizona. The structure is comprised of eleven spans of two-ri... More
Phoenix Indian School, Memorial Hall, Northeast Corner of Central Aven...
Significance: Memorial Hall was the second major building on the site to employ Mission Revival style, and like the first example, the Dining Hall, it was carried out in red brick. It was also sited, parallel ... More
Crosscut Steam Plant, Indian Bend Pond & Pump Ditch, North side Salt R...
Survey number: HAER AZ-20-B Public domain photograph of a canal, water landscape, free to use, no copyright restrictions image - Picryl description
Phoenix Indian School, Gymnasium, Northeast Corner of Central Avenue &...
Significance: A fine example of twentieth-century vernacular building, built entirely of industrial produced materials, with all surfaces and finishes integral to the structure. Unprocessed Field note material... More
Phoenix Indian School, Northeast Corner of Central Avenue & Indian Sch...
Significance: The Phoenix Indian School was the largest off-reservation school for Native American children in the U.S., existing from 1891 to 1990. The institution stood as a memorial to the desire and intent... More
Sweatnan House, Adams Street & Eighteenth Avenue, Phoenix, Maricopa Co...
Survey number: HABS AZ-39 Public domain photograph - historical image of Arizona, United States, free to use, no copyright restrictions image - Picryl description
Phoenix Indian School, Dining Hall, Northeast Corner of Central Avenue...
Significance: The Dining Hall is the oldest surviving major structure on the site of the Phoenix Indian School. In addition, not only was it the first structure at the School to employ Mission Revival style, i... More
Phoenix Indian School, Dining Hall, Northeast Corner of Central Avenue...
Significance: The Dining Hall is the oldest surviving major structure on the site of the Phoenix Indian School. In addition, not only was it the first structure at the School to employ Mission Revival style, i... More
Phoenix Indian School, War Memorial, Northeast Corner of Central Avenu...
Significance: The War Memorial commemorated "the students of this school who enlisted in the Army and Navy during the World War." The number of memorials dedicated particularly to service in the US armed force... More
Rose Pauson House (Ruins), Thirty-Second Street, Phoenix, Maricopa Cou...
Significance: The Pauson House was designed by Frank Lloyd Wright and completed in 1940. Three photographs and two floor plans of the house were published in Henry-Russel Hitchcock's "In the Nature of Material... More
Waddell Dam, On Agua Fria River, 35 miles northwest of Phoenix, Phoeni...
Significance: It is the only storage dam constructed by private interests in central Arizona. It became the largest multiple arch dam in the world upon completion. Survey number: HAER AZ-11 Building/structure... More
Waddell Dam, On Agua Fria River, 35 miles northwest of Phoenix, Phoeni...
Significance: It is the only storage dam constructed by private interests in central Arizona. It became the largest multiple arch dam in the world upon completion. Survey number: HAER AZ-11 Building/structure... More
Waddell Dam, On Agua Fria River, 35 miles northwest of Phoenix, Phoeni...
Significance: It is the only storage dam constructed by private interests in central Arizona. It became the largest multiple arch dam in the world upon completion. Survey number: HAER AZ-11 Building/structure... More
Waddell Dam, On Agua Fria River, 35 miles northwest of Phoenix, Phoeni...
Significance: It is the only storage dam constructed by private interests in central Arizona. It became the largest multiple arch dam in the world upon completion. Survey number: HAER AZ-11 Building/structure... More
Waddell Dam, On Agua Fria River, 35 miles northwest of Phoenix, Phoeni...
Significance: It is the only storage dam constructed by private interests in central Arizona. It became the largest multiple arch dam in the world upon completion. Survey number: HAER AZ-11 Building/structure... More
Waddell Dam, On Agua Fria River, 35 miles northwest of Phoenix, Phoeni...
Significance: It is the only storage dam constructed by private interests in central Arizona. It became the largest multiple arch dam in the world upon completion. Survey number: HAER AZ-11 Building/structure... More
Waddell Dam, On Agua Fria River, 35 miles northwest of Phoenix, Phoeni...
Significance: It is the only storage dam constructed by private interests in central Arizona. It became the largest multiple arch dam in the world upon completion. Survey number: HAER AZ-11 Building/structure... More
Theodore Roosevelt Dam, Transformer House, Salt River, Tortilla Flat, ...
Survey number: HAER AZ-6-B Building/structure dates: 1908 Initial Construction National Register of Historic Places NRIS Number: 100001454
Western Canal, South side of Salt River between Tempe, Phoenix & Mesa,...
Significance: The Western Canal expanded the irrigable acreage of the Salt River Project; constructed partly by the Reclamation Service and partly by the landowners to be served; supplied water to the Highline ... More
Horse Mesa Dam, Salt River, 65 miles East of Phoenix, Phoenix, Maricop...
Significance: It was the second dam constructed under the Salt River Project's hydroelectric expansion program in the 1920s. Survey number: HAER AZ-15 Building/structure dates: 1927 Initial Construction Nati... More
Horse Mesa Dam, Salt River, 65 miles East of Phoenix, Phoenix, Maricop...
Significance: It was the second dam constructed under the Salt River Project's hydroelectric expansion program in the 1920s. Survey number: HAER AZ-15 Building/structure dates: 1927 Initial Construction Nati... More
Horse Mesa Dam, Salt River, 65 miles East of Phoenix, Phoenix, Maricop...
Significance: It was the second dam constructed under the Salt River Project's hydroelectric expansion program in the 1920s. Survey number: HAER AZ-15 Building/structure dates: 1927 Initial Construction Nati... More
Grand Canal, North side of Salt River, Tempe, Maricopa County, AZ
Significance: This was the first Salt River Valley canal that was built by a canal company; that improved northside distribution system; that was the site of the most significant low-head hydropower plant of th... More
Grand Canal, North side of Salt River, Tempe, Maricopa County, AZ
Significance: This was the first Salt River Valley canal that was built by a canal company; that improved northside distribution system; that was the site of the most significant low-head hydropower plant of th... More
Grand Canal, North side of Salt River, Tempe, Maricopa County, AZ
Significance: This was the first Salt River Valley canal that was built by a canal company; that improved northside distribution system; that was the site of the most significant low-head hydropower plant of th... More
Grand Canal, North side of Salt River, Tempe, Maricopa County, AZ
Significance: This was the first Salt River Valley canal that was built by a canal company; that improved northside distribution system; that was the site of the most significant low-head hydropower plant of th... More
Cross Cut Hydro Plant, North Side of Salt River, Tempe, Maricopa Count...
Significance: This was the largest low-head hydro plant in the SRP system. From about 1915 to 1938, it represented a large percentage of the SRP generating capacity. Survey number: HAER AZ-30 Building/structu... More
Cross Cut Hydro Plant, North Side of Salt River, Tempe, Maricopa Count...
Significance: This was the largest low-head hydro plant in the SRP system. From about 1915 to 1938, it represented a large percentage of the SRP generating capacity. Survey number: HAER AZ-30 Building/structu... More