Cazadero Powerhouse & Bridge, Faraday Road, Estacada, Clackamas County...
Significance: The Cazadero Powerhouse and Bridge are significant for their association with the early development of hydroelectric power generation for the City of Portland and the surrounding areas. Constructi... More
Salinas Dam, Salinas River near Pozo Road, Santa Margarita, San Luis O...
Significance: The Salinas Dam, a "hoof" type, inclined, variable radius arch cam, was designed by Raymond A. Hill, an important structural engineer who worked in Los Angeles, California between 1919 and the 196... More
Salinas Dam, Salinas River near Pozo Road, Santa Margarita, San Luis O...
Significance: The Salinas Dam, a "hoof" type, inclined, variable radius arch cam, was designed by Raymond A. Hill, an important structural engineer who worked in Los Angeles, California between 1919 and the 196... More
Turners Falls Power & Electric Company, Hampden Station, East bank of ...
Significance: Turners Falls Power and Electric Company built only hydroelectric facilities until World War I, when it constructed the coal-fired, steam-powered Hampden Station to meet increased industrial deman... More
Rush Creek Hydroelectric System, Powerhouse Exciters, Rush Creek, June...
Picryl description: Public domain image of a hydroelectric dam, industrial facility, power generation, water cascade, free to use, no copyright restrictions.
Rush Creek Hydroelectric System, Powerhouse Exciters, Rush Creek, June...
Picryl description: Public domain image of a hydroelectric dam, industrial facility, power generation, water cascade, free to use, no copyright restrictions.
Rush Creek Hydroelectric System, Powerhouse Exciters, Rush Creek, June...
Picryl description: Public domain image of a hydroelectric dam, industrial facility, power generation, water cascade, free to use, no copyright restrictions.
Morony Hydroelectric Facility, Dam and Powerhouse, Morony Dam Road, Gr...
Significance: It is significant as a very-well preserved example of design concepts common to the era standardization in US history of hydroelectric development (ca. 1929-1930). Design concepts reflected by the... More
Kern County No. 1 Hydroelectric System, Powerhouse Exciters, Kern Rive...
Significance: The Kern River No. 1 powerhouse is equipped with two exciters (small electric generators) to provide direct field current to the four 5000 kv generators. The No. 1 exciter is original equipment d... More
Sewall's Falls Hydroelectric Facility, East end of Second Street spann...
Significance: The dam in Concord, New Hampshire, was one of the longest timber crib dams in the eastern U.S. On September 29, 1893, this became the second commercial supplier of three-phase electric current in ... More
Sewall's Falls Hydroelectric Facility, East end of Second Street spann...
Significance: The dam in Concord, New Hampshire, was one of the longest timber crib dams in the eastern U.S. On September 29, 1893, this became the second commercial supplier of three-phase electric current in ... More
Sewall's Falls Hydroelectric Facility, East end of Second Street spann...
Significance: The dam in Concord, New Hampshire, was one of the longest timber crib dams in the eastern U.S. On September 29, 1893, this became the second commercial supplier of three-phase electric current in ... More
Sewall's Falls Hydroelectric Facility, East end of Second Street spann...
Significance: The dam in Concord, New Hampshire, was one of the longest timber crib dams in the eastern U.S. On September 29, 1893, this became the second commercial supplier of three-phase electric current in ... More
Lake Whitney Water Filtration Plant, Lake Whitney Dam, East side of Wh...
Significance: The site offers an interesting view of water power history and development. A dam existed at a nearby site as early as 1798 and provided water to power a grist mill. The dam has undergone severa... More
Hoover Dam, Los Angeles Switch Yard, U.S. Highway 93, Boulder City, Cl...
Significance: It was the first and largest of the six major Federal switchyards at Hoover Dam. When the first stage of the switchyard began operations in 1936, it provided electricity at the highest voltages ev... More
Cove Hydroelectric Development, Lower Gate House, Cove Power Plant Roa...
Picryl description: Public domain image of a hydroelectric dam, industrial facility, power generation, water cascade, free to use, no copyright restrictions.
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
Rush Creek Hydroelectric System, Worker Cottage, Rush Creek, June Lake...
Significance: Building 105 is one of the earliest Rush Creek worker cottages. Designed by the Riverside, California architect, W.C. Tanner, it combines Craftsman Bungalow and English Cottage styles. The Rush ... More
Upper Souris National Wildlife Refuge, Dam 96, Souris River Basin, Fox...
Significance: The dams within the J. Clark Salyer National Wildlife Refuge represent a historical movement to preserve wildlife and wildlife habitat in the United States, which began in the mid-19th century and... More
Holter Hydroelectric Facility, Mechanic's Garage, End of Holter Dam Ro...
Significance: The Holter Hydroelectric Facility Historic District is significant as one of the most intact hydroelectric generating plants and operators' camps on the Missouri-Madison Project. The garage contri... More
Bonneville Power Administration Burley Substation, 1221 Albion Avenue,...
Significance: The Burley Substation is significant as a distribution component of the United States Reclamation Service's Minidoka Project, which pioneered agricultural development and the market for commercial... More
Milltown Dam, Clark Fork River, 6 miles upstream from Missoula, Millto...
Significance: The dam and power plant are significant for their association with W.A. Clark, one of the single-most important individuals in the economic and political history of Montana; for its association wi... More
Parker Dam, Spanning Colorado River between AZ & CA, Parker, La Paz Co...
Significance: It was constructed from 1934 to 1938 as the second impoundment of the lower Colorado River by the Bureau of Reclamation. Together with the Hoover Dam and Davis Dam, 155 miles upstream and 88 miles... More
Columbia Basin Project, Grand Coulee Siphon Breaker Building, Grand Co...
Significance: The Siphon-Breaker Building played a small but critical role in the process of delivering water from the Columbia River to the irrigation system. Its main function was to manage the flow at the to... More
Electron Hydroelectric Project, Along Puyallup River, Electron, Pierce...
Picryl description: Public domain image of a hydroelectric dam, industrial facility, power generation, water cascade, free to use, no copyright restrictions.
Electron Hydroelectric Project, Along Puyallup River, Electron, Pierce...
Picryl description: Public domain image of a hydroelectric dam, industrial facility, power generation, water cascade, free to use, no copyright restrictions.
Electron Hydroelectric Project, Along Puyallup River, Electron, Pierce...
Picryl description: Public domain image of a hydroelectric dam, industrial facility, power generation, water cascade, free to use, no copyright restrictions.
Electron Hydroelectric Project, Along Puyallup River, Electron, Pierce...
Picryl description: Public domain image of a hydroelectric dam, industrial facility, power generation, water cascade, free to use, no copyright restrictions.
Bonneville Project, Columbia River, 1 mile Northeast of Exit 40, off I...
Significance: Bonneville Dam was the first of eight federal lock and dam projects on the Columbia-Snake rivers. The dam's significance is derived from its unique engineering design, its contribution to the reg... More
Bonneville Project, Columbia River, 1 mile Northeast of Exit 40, off I...
Significance: Bonneville Dam was the first of eight federal lock and dam projects on the Columbia-Snake rivers. The dam's significance is derived from its unique engineering design, its contribution to the reg... More
Bonneville Project, Columbia River, 1 mile Northeast of Exit 40, off I...
Significance: Bonneville Dam was the first of eight federal lock and dam projects on the Columbia-Snake rivers. The dam's significance is derived from its unique engineering design, its contribution to the reg... More
Bonneville Project, Columbia River, 1 mile Northeast of Exit 40, off I...
Significance: Bonneville Dam was the first of eight federal lock and dam projects on the Columbia-Snake rivers. The dam's significance is derived from its unique engineering design, its contribution to the reg... More
Michigan Lake Superior Power Company, Portage Street, Sault Ste. Marie...
Picryl description: Public domain image of a hydroelectric dam, industrial facility, power generation, water cascade, free to use, no copyright restrictions.
Michigan Lake Superior Power Company, Portage Street, Sault Ste. Marie...
Picryl description: Public domain image of a hydroelectric dam, industrial facility, power generation, water cascade, free to use, no copyright restrictions.
Michigan Lake Superior Power Company, Portage Street, Sault Ste. Marie...
Picryl description: Public domain image of an industrial equipment, workshop, assembly line, factory, power engine, 19th-20th century, free to use, no copyright restrictions.
Michigan Lake Superior Power Company, Portage Street, Sault Ste. Marie...
Picryl description: Public domain image of a bridge, water, historic structure, free to use, no copyright restrictions.
Michigan Lake Superior Power Company, Portage Street, Sault Ste. Marie...
Picryl description: Public domain image of an industrial equipment, workshop, assembly line, factory, power engine, 19th-20th century, free to use, no copyright restrictions.
Michigan Lake Superior Power Company, Portage Street, Sault Ste. Marie...
Picryl description: Public domain vintage artistic photograph, free to use, no copyright restrictions image.
Michigan Lake Superior Power Company, Portage Street, Sault Ste. Marie...
Picryl description: Public domain image of a hydroelectric dam, industrial facility, power generation, water cascade, free to use, no copyright restrictions.
Gregg Shoals Dam & Power Plant, Across Savannah River, Lowndesville, A...
Significance: The Gregg Shoals Dam and Power Plant began operations in May 1907 and produced electricity until September 1954. It was among the early low-head hydroelectric plants in America and is associated ... More
Upper Mississippi River 9-Foot Channel, Lock & Dam No. 8, On Mississip...
See HAER MN-20, Upper Mississippi River Nine-Foot Channel Project History, Locks and Dams 3-10, for additional information. Significance: The Upper Mississippi River Lock and Dam Project represents one of the l... More
Telluride Power Company, Olmsted Hydroelectric Plant, mouth of Provo R...
Picryl description: Public domain image of a hydroelectric dam, industrial facility, power generation, water cascade, free to use, no copyright restrictions.
Mississippi River 9-Foot Channel, Lock & Dam No. 19, Upper Mississippi...
Significance: Rare, intact example of nationally significant historic engineering listed on the National Register of Historic Places as part of the Lock 19 National Register District. The U.S. Army Corps of ... More
Mississippi River 9-Foot Channel, Lock & Dam No. 19, Upper Mississippi...
Significance: Rare, intact example of nationally significant historic engineering listed on the National Register of Historic Places as part of the Lock 19 National Register District. The U.S. Army Corps of ... More
Mississippi River 9-Foot Channel, Lock & Dam No. 19, Upper Mississippi...
Significance: Rare, intact example of nationally significant historic engineering listed on the National Register of Historic Places as part of the Lock 19 National Register District. The U.S. Army Corps of ... More
Mississippi River 9-Foot Channel, Lock & Dam No. 19, Upper Mississippi...
Significance: Rare, intact example of nationally significant historic engineering listed on the National Register of Historic Places as part of the Lock 19 National Register District. The U.S. Army Corps of ... More
Mississippi River 9-Foot Channel, Lock & Dam No. 19, Upper Mississippi...
Significance: Rare, intact example of nationally significant historic engineering listed on the National Register of Historic Places as part of the Lock 19 National Register District. The U.S. Army Corps of ... More
Mississippi River 9-Foot Channel, Lock & Dam No. 19, Upper Mississippi...
Significance: Rare, intact example of nationally significant historic engineering listed on the National Register of Historic Places as part of the Lock 19 National Register District. The U.S. Army Corps of ... More
Mississippi River 9-Foot Channel, Lock & Dam No. 19, Upper Mississippi...
Significance: Rare, intact example of nationally significant historic engineering listed on the National Register of Historic Places as part of the Lock 19 National Register District. The U.S. Army Corps of ... More
Mississippi River 9-Foot Channel, Lock & Dam No. 19, Upper Mississippi...
Significance: Rare, intact example of nationally significant historic engineering listed on the National Register of Historic Places as part of the Lock 19 National Register District. The U.S. Army Corps of ... More
Mississippi River 9-Foot Channel, Lock & Dam No. 19, Upper Mississippi...
Significance: Rare, intact example of nationally significant historic engineering listed on the National Register of Historic Places as part of the Lock 19 National Register District. The U.S. Army Corps of ... 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
Washington Water Power Clark Fork River Noxon Rapids Hydroelectric Dev...
Significance: It is locally important because of its influence, along with the associated Noxon Rapids Hydroelectric Development, on the local environment, landscape and economy. The facility is also important ... More
Columbia Basin Project, Grand Coulee Dam & Franklin D. Roosevelt Lake,...
The Columbia Basin Project is located in 5 counties: Ferry, Grant, Lincoln, Okanogan, and Stevens Significance: At the time of construction, Grand Coulee Dam was the most massive structure ever built: construct... More
Columbia Basin Project, Grand Coulee Dam & Franklin D. Roosevelt Lake,...
The Columbia Basin Project is located in 5 counties: Ferry, Grant, Lincoln, Okanogan, and Stevens Significance: At the time of construction, Grand Coulee Dam was the most massive structure ever built: construct... More
Hoover Dam, Circuits 1-15, U.S. Highway 93, Boulder City, Clark County...
Significance: Transformer Circuits are integral elements of the Hoover Dam electrical generation and transmission system. The circuits contributed to the importance of Hoover Dam power in the WWII and post-war ... More
Hoover Dam, Circuits 1-15, U.S. Highway 93, Boulder City, Clark County...
Significance: Transformer Circuits are integral elements of the Hoover Dam electrical generation and transmission system. The circuits contributed to the importance of Hoover Dam power in the WWII and post-war ... More
Hoover Dam, Circuits 1-15, U.S. Highway 93, Boulder City, Clark County...
Significance: Transformer Circuits are integral elements of the Hoover Dam electrical generation and transmission system. The circuits contributed to the importance of Hoover Dam power in the WWII and post-war ... More
Abbeville Hydroelectric Power Plant, State Highway 284 & County Road 7...
Significance: J. Roy Pennell acquired property and began construction of the multiple arch reinforced concrete dam in 1933. Pennell abandoned the project in 1935 and it was completed by the City of Abbeville w... More
Abbeville Hydroelectric Power Plant, State Highway 284 & County Road 7...
Significance: J. Roy Pennell acquired property and began construction of the multiple arch reinforced concrete dam in 1933. Pennell abandoned the project in 1935 and it was completed by the City of Abbeville w... More
Abbeville Hydroelectric Power Plant, State Highway 284 & County Road 7...
Significance: J. Roy Pennell acquired property and began construction of the multiple arch reinforced concrete dam in 1933. Pennell abandoned the project in 1935 and it was completed by the City of Abbeville w... More
Abbeville Hydroelectric Power Plant, State Highway 284 & County Road 7...
Significance: J. Roy Pennell acquired property and began construction of the multiple arch reinforced concrete dam in 1933. Pennell abandoned the project in 1935 and it was completed by the City of Abbeville w... More
Abbeville Hydroelectric Power Plant, State Highway 284 & County Road 7...
Significance: J. Roy Pennell acquired property and began construction of the multiple arch reinforced concrete dam in 1933. Pennell abandoned the project in 1935 and it was completed by the City of Abbeville w... More
Abbeville Hydroelectric Power Plant, State Highway 284 & County Road 7...
Significance: J. Roy Pennell acquired property and began construction of the multiple arch reinforced concrete dam in 1933. Pennell abandoned the project in 1935 and it was completed by the City of Abbeville w... More
Santa Ana River Hydroelectric System, SAR-3 Powerhouse, San Bernardino...
Survey number: HAER CA-130-W Building/structure dates: 1898 Initial Construction Building/structure dates: 1905 Subsequent Work Building/structure dates: 1904 Subsequent Work
Santa Ana River Hydroelectric System, SAR-3 Powerhouse, San Bernardino...
Survey number: HAER CA-130-W Building/structure dates: 1898 Initial Construction Building/structure dates: 1905 Subsequent Work Building/structure dates: 1904 Subsequent Work
Santa Ana River Hydroelectric System, SAR-3 Powerhouse, San Bernardino...
Survey number: HAER CA-130-W Building/structure dates: 1898 Initial Construction Building/structure dates: 1905 Subsequent Work Building/structure dates: 1904 Subsequent Work
Santa Ana River Hydroelectric System, SAR-3 Powerhouse, San Bernardino...
Survey number: HAER CA-130-W Building/structure dates: 1898 Initial Construction Building/structure dates: 1905 Subsequent Work Building/structure dates: 1904 Subsequent Work
Santa Ana River Hydroelectric System, SAR-3 Powerhouse, San Bernardino...
Survey number: HAER CA-130-W Building/structure dates: 1898 Initial Construction Building/structure dates: 1905 Subsequent Work Building/structure dates: 1904 Subsequent Work
Santa Ana River Hydroelectric System, SAR-3 Powerhouse, San Bernardino...
Survey number: HAER CA-130-W Building/structure dates: 1898 Initial Construction Building/structure dates: 1905 Subsequent Work Building/structure dates: 1904 Subsequent Work
Elwha River Hydroelectric System, Elwha Hydroelectric Dam & Plant, Por...
Unprocessed Field note material exists for this structure: N465 Survey number: HAER WA-130-A
Elwha River Hydroelectric System, Elwha Hydroelectric Dam & Plant, Por...
Unprocessed Field note material exists for this structure: N465 Survey number: HAER WA-130-A
Elwha River Hydroelectric System, Elwha Hydroelectric Dam & Plant, Por...
Unprocessed Field note material exists for this structure: N465 Survey number: HAER WA-130-A
Santa Ana River Hydroelectric System, Redlands, San Bernardino County,...
Picryl description: Public domain image of a hydroelectric dam, industrial facility, power generation, water cascade, free to use, no copyright restrictions.
Santa Ana River Hydroelectric System, Redlands, San Bernardino County,...
Picryl description: Public domain image of a hydroelectric dam, industrial facility, power generation, water cascade, free to use, no copyright restrictions.
Upper Mississippi River 9-Foot Channel, Lock & Dam No. 9, Lynxville, C...
See HAER MN-20, Upper Mississippi River Nine-Foot Channel Project History, Locks and Dams 3-10, for additional information. Significance: The Upper Mississippi River Lock and Dam Project represents one of the l... More
New Croton Dam & Reservoir, Croton River, Croton-on-Hudson, Westcheste...
Picryl description: Public domain image of a waterfall, water stream, cascade, nature site, free to use, no copyright restrictions.
New Croton Dam & Reservoir, Croton River, Croton-on-Hudson, Westcheste...
Picryl description: Public domain image of a quarry, excavation site, free to use, no copyright restrictions.
Cedar Falls Hydroelectric Works, Cedar Falls Road, 3.5 miles south of ...
Significance: The assemblage of industrial structures and architectural features that comprise the Cedar Falls Hydroelectric Works Historic District occupies an important position in the political and social ev... More
Cedar Falls Hydroelectric Works, Cedar Falls Road, 3.5 miles south of ...
Significance: The assemblage of industrial structures and architectural features that comprise the Cedar Falls Hydroelectric Works Historic District occupies an important position in the political and social ev... More
Cedar Falls Hydroelectric Works, Cedar Falls Road, 3.5 miles south of ...
Significance: The assemblage of industrial structures and architectural features that comprise the Cedar Falls Hydroelectric Works Historic District occupies an important position in the political and social ev... More
Cedar Falls Hydroelectric Works, Cedar Falls Road, 3.5 miles south of ...
Significance: The assemblage of industrial structures and architectural features that comprise the Cedar Falls Hydroelectric Works Historic District occupies an important position in the political and social ev... More
Cedar Falls Hydroelectric Works, Cedar Falls Road, 3.5 miles south of ...
Significance: The assemblage of industrial structures and architectural features that comprise the Cedar Falls Hydroelectric Works Historic District occupies an important position in the political and social ev... More
Upper Mississippi River 9-Foot Channel Project, Lock & Dam No. 5, Minn...
Significance: The Upper Mississippi River Lock and Dam Project represents one of the largest and most ambitious of such undertakings. With root in the Progressive Era, the project was adopted by New Deal propo... More
Hume Lake Dam, Sequioa National Forest, Hume, Fresno County, CA
Significance: Hume Lake Dam was the world's first reinforced a concrete multiple arch dam. Built to impound reservoir for the Hume-Bennett Lumber Company, today it is the only major surviving structure represe... More
Bishop Creek Hydroelectric System, Plant 6, Cashbaugh-Kilpatrick House...
Significance: Although greatly modified, the 19th Century Cashbaugh-era structures combined into Building 102 are reputed to be the oldest surviving houses in the Owens Valley. The Cashbaugh/Kilpatrick house's... More
Bishop Creek Hydroelectric System, Plant 6, Cashbaugh-Kilpatrick House...
Significance: Although greatly modified, the 19th Century Cashbaugh-era structures combined into Building 102 are reputed to be the oldest surviving houses in the Owens Valley. The Cashbaugh/Kilpatrick house's... More
Bishop Creek Hydroelectric System, Plant 6, Cashbaugh-Kilpatrick House...
Significance: Although greatly modified, the 19th Century Cashbaugh-era structures combined into Building 102 are reputed to be the oldest surviving houses in the Owens Valley. The Cashbaugh/Kilpatrick house's... More
Bishop Creek Hydroelectric System, Plant 6, Cashbaugh-Kilpatrick House...
Significance: Although greatly modified, the 19th Century Cashbaugh-era structures combined into Building 102 are reputed to be the oldest surviving houses in the Owens Valley. The Cashbaugh/Kilpatrick house's... More
Bishop Creek Hydroelectric System, Plant 6, Cashbaugh-Kilpatrick House...
Significance: Although greatly modified, the 19th Century Cashbaugh-era structures combined into Building 102 are reputed to be the oldest surviving houses in the Owens Valley. The Cashbaugh/Kilpatrick house's... More
Washington Water Power Company Monroe Street Plant, Units 4 & 5, South...
Significance: Installed in Washington Water Power Company's (WWPC) Monroe Street Plant in 1903, Generating Units 4 and 5 are believed to be the oldest turbine-generator units still operating in the State of Was... More
Santa Ana River Hydroelectric System, SAR-2 Powerhouse, Redlands, San ...
Survey number: HAER CA-130-Q Building/structure dates: 1898 Initial Construction Building/structure dates: 1905 Subsequent Work Building/structure dates: 1904 Subsequent Work
Boise Project, Boise River Diversion Dam, Across Boise River, Boise, A...
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, co... More
Boise Project, Boise River Diversion Dam, Across Boise River, Boise, A...
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, co... More
Bishop Creek Hydroelectric System, Plant 4, Worker Cottage, Bishop Cre...
Significance: Building 16, Plant 4 (formerly Building No. 7 Plant 4), a small Craftsman Style cottage, is the oldest permanently built residence at Plant 4. Its significance lies in its contribution to an unde... More
Bishop Creek Hydroelectric System, Plant 4, Worker Cottage, Bishop Cre...
Significance: Building 16, Plant 4 (formerly Building No. 7 Plant 4), a small Craftsman Style cottage, is the oldest permanently built residence at Plant 4. Its significance lies in its contribution to an unde... More
Bishop Creek Hydroelectric System, Plant 4, Worker Cottage, Bishop Cre...
Significance: Building 16, Plant 4 (formerly Building No. 7 Plant 4), a small Craftsman Style cottage, is the oldest permanently built residence at Plant 4. Its significance lies in its contribution to an unde... More