![Arrowrock Dam, [Idaho] - Glass negative photogrpah. Public domain.](https://cache.getarchive.net/Prod/thumb/cdn4/L3Bob3RvLzE5MTAvMDEvMDEvYXJyb3dyb2NrLWRhbS1pZGFoby0xMDI0LmpwZw%3D%3D/40/52/webp "Arrowrock Dam, [Idaho] - Glass negative photogrpah. Public domain.")
Arrowrock Dam, [Idaho] - Glass negative photogrpah. Public domain.
Public domain historical photo, free to use, no copyright restrictions image - Picryl description
![Roosevelt Dam, [Arizona] - Glass negative photogrpah. Public domain.](https://cache.getarchive.net/Prod/thumb/cdn4/L3Bob3RvLzE5MTAvMDEvMDEvcm9vc2V2ZWx0LWRhbS1hcml6b25hLTEtMTAyNC5qcGc%3D/40/31/webp "Roosevelt Dam, [Arizona] - Glass negative photogrpah. Public domain.")
Roosevelt Dam, [Arizona] - Glass negative photogrpah. Public domain.
Public domain historical photo, free to use, no copyright restrictions image - Picryl description
![[Mormon Flat Dam with double-gated spillway on right side on the Salt River, Maricopa County, Arizona]](https://cache.getarchive.net/Prod/thumb/cdn4/L3Bob3RvLzIwMTkvMDkvMjUvbW9ybW9uLWZsYXQtZGFtLXdpdGgtZG91YmxlLWdhdGVkLXNwaWxsd2F5LW9uLXJpZ2h0LXNpZGUtb24tdGhlLXNhbHQtcml2ZXItMWIwNzg0LTEwMjQuanBn/40/33/webp "[Mormon Flat Dam with double-gated spillway on right side on the Salt River, Maricopa County, Arizona]")
[Mormon Flat Dam with double-gated spillway on right side on the Salt ...
3158. Public domain photograph of electric power generation, power lines, free to use, no copyright restrictions image - Picryl description Public domain photograph of electric power plant, generation, free ... More
Shasta dam under construction, California
11671-31. Transfer from U.S. Office of War Information, 1944. General information about the FSA/OWI Color Photographs is available at http://hdl.loc.gov/loc.pnp/pp.fsac Title from FSA or OWI agency caption. Add... More
Roosevelt Dam showing small amount of impounded water because of exten...
Picryl description: Public domain image of a power dam, cascade, free to use, no copyright restrictions.
Boulder Dam. Nevada - safety film negatives, Library of Congress
Picryl description: Public domain image of a power dam, cascade, free to use, no copyright restrictions.
Norris Dam, Tennessee - safety film negatives, Library of Congress
Picryl description: Public domain image of a power dam, cascade, free to use, no copyright restrictions.
Friant Dam, Central Valley Reclamation Project, Calif. Panoramic view ...
Picryl description: Public domain image of a power dam, cascade, free to use, no copyright restrictions.
Cherokee Dam, Tennessee (Tennessee Valley Authority (TVA)). Spillway
Picryl description: Public domain image of a power dam, cascade, free to use, no copyright restrictions.
Watts Bar Dam, Tennessee. Tennessee Valley Authority. Construction
Picryl description: Public domain image of a power dam, cascade, free to use, no copyright restrictions.
Shasta Dam, Shasta County, California. Penstocks, pipes which carry wa...
Picryl description: Public domain image of a power dam, cascade, free to use, no copyright restrictions.
View of the Cheesman Dam from its vast reservoir in Jefferson County, ...
Title, date and keywords based on information provided by the photographer. Cheesman was the first reservoir of Denver's mountain storage facilities that helped expand Denver Water's system. Built by immigrant ... More
Water cascades down venerable Cheesman Dam in Jefferson County, Colora...
Title, date and keywords based on information provided by the photographer. The reservoir the dam created was the first in Denver's mountain storage facilities that helped expand Denver Water's system. Built by... More
Guntersville Dam on the Tennessee River, Guntersville, Alabama
Guntersville was founded by German immigrant John Gunter (the great-grandfather of American humorist Will Rogers). It is located at the southernmost point of the Tennessee River on Lake Guntersville, formed by ... More
Bloede Dam, Spanning Patapsco River, Avalon, Baltimore County, MD
Significance: In 1907, the Patapsco Electric and Manufacturing Company contracted Ambursen Hydraulic Construction Company to build the Bloede Dam using Nils F. Ambursen's patent. The proposed dam would generate... More
Dam No. 4 Hydroelectric Plant, Potomac River, Martinsburg, Berkeley Co...
Significance: Each plant epitomized the predominant low head hydroelectric technology in use at the time of its construction, Dam 4 uses tandem, multiple-runner, horizontal shaft turbines connected by rope driv... More
Dam No. 4 Hydroelectric Plant, Potomac River, Martinsburg, Berkeley Co...
Significance: Each plant epitomized the predominant low head hydroelectric technology in use at the time of its construction, Dam 4 uses tandem, multiple-runner, horizontal shaft turbines connected by rope driv... More
Dam No. 4 Hydroelectric Plant, Potomac River, Martinsburg, Berkeley Co...
Significance: Each plant epitomized the predominant low head hydroelectric technology in use at the time of its construction, Dam 4 uses tandem, multiple-runner, horizontal shaft turbines connected by rope driv... More
Wilson Dam & Hydroelectric Plant, Spanning Tennessee River at Wilson D...
Significance: In 1918, by the directive of the U.S. War Department, the Army Corps of Engineers began construction on Wilson Dam, a large hydroelectric project that was to supply power to U.S. Nitrate Plant No.... More
Wilson Dam & Hydroelectric Plant, Spanning Tennessee River at Wilson D...
Significance: In 1918, by the directive of the U.S. War Department, the Army Corps of Engineers began construction on Wilson Dam, a large hydroelectric project that was to supply power to U.S. Nitrate Plant No.... More
Wilson Dam & Hydroelectric Plant, Spanning Tennessee River at Wilson D...
Significance: In 1918, by the directive of the U.S. War Department, the Army Corps of Engineers began construction on Wilson Dam, a large hydroelectric project that was to supply power to U.S. Nitrate Plant No.... More
Hoover Dam, Spanning Colorado River at Route 93, Boulder City, Clark C...
Significance: It is a National Historic Landmark, an American Civil Engineering Landmark, and the focus of an historic district listed on the National Register of Historic Places. The dam was constructed betwee... More
Hoover Dam, Spanning Colorado River at Route 93, Boulder City, Clark C...
Significance: It is a National Historic Landmark, an American Civil Engineering Landmark, and the focus of an historic district listed on the National Register of Historic Places. The dam was constructed betwee... More
Trout Creek Dam, River Mile 1.8 on Trout Creek, Carson, Skamania Count...
Significance: The dam and fish ladder were constructed by the CCC, Company 944 in 1935-36. The structure, a concrete arch dam, is believed to be one of the largest power generation plants constructed solely by ... More
Butt Valley Dam, Butt Valley Reservoir Road, Caribou, Plumas County, C...
Significance: Butt Valley Dam was constructed during the development of North Fork Feather River hydroelectric power and was part of the overall system. The existing dam consists of the 1921 rock fill dam and ... More
Columbia Basin Project, Grand Coulee Dam Powerplant Complex, Grand Cou...
Picryl description: Public domain image of a dam, reservoir, quarry, or excavation site, free to use, no copyright restrictions.
Middle Creek Hydroelectric Dam, On Middle Creek, West of U.S. Route 15...
Significance: The Middle Creek Hydroelectric Dam is a significant example of a timber crib dam and small electric generating station, that is typical of early rural electrification in America. Locally it was a... More
Middle Creek Hydroelectric Dam, On Middle Creek, West of U.S. Route 15...
Significance: The Middle Creek Hydroelectric Dam is a significant example of a timber crib dam and small electric generating station, that is typical of early rural electrification in America. Locally it was a... More
Holter Hydroelectric Facility, House No. 1, End of Holter Dam Road, Wo...
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. House No. 1 contr... More
Croton Hydroelectric Plant, Substation, Croton Dam Road at Muskegon Ri...
Significance: The Croton Hydroelectric Plant substation was constructed in 1930-31 to replace the original switching equipment and transformers built in 1908 and located inside of the original powerhouse. This... More
Mormon Flat Dam, On Salt River, Eastern Maricopa County, east of Phoen...
Picryl description: Public domain image of a locomotive, train tracks, rail transportation, railroad, railway, 19th-20th century, free to use, no copyright restrictions.
Mormon Flat Dam, On Salt River, Eastern Maricopa County, east of Phoen...
Picryl description: Public domain image of a power dam, cascade, free to use, no copyright restrictions.
Mormon Flat Dam, On Salt River, Eastern Maricopa County, east of Phoen...
Picryl description: Public domain image of a power dam, cascade, free to use, no copyright restrictions.
Mormon Flat Dam, On Salt River, Eastern Maricopa County, east of Phoen...
Picryl description: Public domain image of a power dam, cascade, free to use, no copyright restrictions.
Mormon Flat Dam, On Salt River, Eastern Maricopa County, east of Phoen...
Picryl description: Public domain image of a power dam, cascade, free to use, no copyright restrictions.
Hoover Dam, Cable Hoist House, U.S. Highway 93, Boulder City, Clark Co...
Significance: It provided access to control cable tunnels from the power plant to the switchyard relay house, and a transformer in the lower level of the hoist house provided operating electricity to the switch... More
Hoover Dam, Los Angeles Bureau of Power & Light Lines 1-3, U.S. Highwa...
Significance: The transmission lines included pioneering technology in high-voltage transmission. The lines were crucial elements of the Hoover Dam electrical complex, particularly in the role played by Hoover ... More
Hoover Dam, Los Angeles Bureau of Power & Light Lines 1-3, U.S. Highwa...
Significance: The transmission lines included pioneering technology in high-voltage transmission. The lines were crucial elements of the Hoover Dam electrical complex, particularly in the role played by Hoover ... More
Hauser Hydroelectric Facility, Powerhouse, East Bank of Missouri River...
Significance: The Hauser Hydroelectric Facility Historic District is significant for its association with the industrial development of Montana in the early twentieth century and the consolidation of most of th... More
Lake Lynn Hydroelectric Power House & Dam, Cheat River, Morgantown, Mo...
Significance: When built, the Lake Lynn power house and dam reflected the state of the art in American hydroelectric power technology and developed a very substantial portion of West Virginia's hydrologic resou... More
Lake Lynn Hydroelectric Power House & Dam, Cheat River, Morgantown, Mo...
Significance: When built, the Lake Lynn power house and dam reflected the state of the art in American hydroelectric power technology and developed a very substantial portion of West Virginia's hydrologic resou... More
Lake Lynn Hydroelectric Power House & Dam, Cheat River, Morgantown, Mo...
Significance: When built, the Lake Lynn power house and dam reflected the state of the art in American hydroelectric power technology and developed a very substantial portion of West Virginia's hydrologic resou... More
Lake Lynn Hydroelectric Power House & Dam, Cheat River, Morgantown, Mo...
Significance: When built, the Lake Lynn power house and dam reflected the state of the art in American hydroelectric power technology and developed a very substantial portion of West Virginia's hydrologic resou... More
Lake Lynn Hydroelectric Power House & Dam, Cheat River, Morgantown, Mo...
Significance: When built, the Lake Lynn power house and dam reflected the state of the art in American hydroelectric power technology and developed a very substantial portion of West Virginia's hydrologic resou... More
Lake Lynn Hydroelectric Power House & Dam, Cheat River, Morgantown, Mo...
Significance: When built, the Lake Lynn power house and dam reflected the state of the art in American hydroelectric power technology and developed a very substantial portion of West Virginia's hydrologic resou... More
Lake Lynn Hydroelectric Power House & Dam, Cheat River, Morgantown, Mo...
Significance: When built, the Lake Lynn power house and dam reflected the state of the art in American hydroelectric power technology and developed a very substantial portion of West Virginia's hydrologic resou... More
Lake Lynn Hydroelectric Power House & Dam, Cheat River, Morgantown, Mo...
Significance: When built, the Lake Lynn power house and dam reflected the state of the art in American hydroelectric power technology and developed a very substantial portion of West Virginia's hydrologic resou... More
Kaukauna Lock & Dam, Fox River at Canal Street, Kaukauna, Outagamie Co...
Significance: The Kaukauna Locks and Dam Complex provides passage around drop in elevation of 50 feet in the Lower Fox River at Kaukauna. The complex served as an integral part of the Lower Fox River Waterway ... More
Dam No. 5 Hydroelectric Plant, On Potomac River, Hedgesville, Berkeley...
Picryl description: Public domain image of a power dam, cascade, free to use, no copyright restrictions.
Dam No. 5 Hydroelectric Plant, On Potomac River, Hedgesville, Berkeley...
Picryl description: Public domain image of a power dam, cascade, free to use, no copyright restrictions.
Dam No. 5 Hydroelectric Plant, On Potomac River, Hedgesville, Berkeley...
Picryl description: Public domain photo of a factory, warehouse, commercial or industrial building, free to use, no copyright restrictions image.
Dam No. 5 Hydroelectric Plant, On Potomac River, Hedgesville, Berkeley...
Picryl description: Public domain image of a power dam, cascade, free to use, no copyright restrictions.
Dam No. 5 Hydroelectric Plant, On Potomac River, Hedgesville, Berkeley...
Picryl description: Public domain image of a power dam, cascade, free to use, no copyright restrictions.
Hoover Dam, Southern California Edison 230-KV Switchyard, U.S. Highway...
Significance: It was an integral element of the Hoover Dam electrical generation and transmission system. This switchyard provided much-needed electricity during WWII to power Douglas, Vultee, and Northrup airc... More
Hoover Dam, Southern California Edison 230-KV Switchyard, U.S. Highway...
Significance: It was an integral element of the Hoover Dam electrical generation and transmission system. This switchyard provided much-needed electricity during WWII to power Douglas, Vultee, and Northrup airc... More
Warrior Ridge Dam, Spanning Frankstown Branch of Juniata River, Peters...
Significance: The Ambursen Hydraulic Construction Company, a major dam builder in the United States in the early twentieth century, designed and built the dam. As one of the earliest examples of a covered vers... More
Holter Hydroelectric Facility, House No. 2, End of Holter Dam Road, Wo...
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. House No. 2 contr... More
Long Lake Hydroelectric Plant, Spillway Dam, Spanning Spokane River, F...
Significance: The Long Lake hydroelectric facility is significant as one of the earliest and, for many years, largest hydroelectric generating facilities in The Washington Water Power Company's electrical power... More
Long Lake Hydroelectric Plant, Spillway Dam, Spanning Spokane River, F...
Significance: The Long Lake hydroelectric facility is significant as one of the earliest and, for many years, largest hydroelectric generating facilities in The Washington Water Power Company's electrical power... More
Gallipolis Locks & Dam, Dam, Across Ohio River, Gallipolis, Mason Coun...
Significance: The dam consists of eight bays with moveable gates. The roller gates are the most important engineering feature of the site and are the largest in the country. Survey number: HAER WV-58-A
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
Trenton Falls Hydroelectric Station, Dam & Headworks, On west bank of ...
Significance: Strongly influenced by the earliest Niagara hydroelectric project, the 1901 Trenton Falls Station was installed in a spectacular gorge and was probably the highest-head contemporary plant in the e... 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
Victoria Dam, West branch of Ontonagon River, 4.5 miles southwest of R...
Significance: The reinforced-concrete, multiple-arch buttressed dam was never a very common type in the United States, and it was particularly uncommon in the eastern half of the country. Very few dams of this ... 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
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
Cooke Hydroelectric Plant, Cook Dam Road at Au Sable River, Oscoda, Io...
Significance: It was the beginning of an interconnected power system throughout that state's Lower Peninsula. When Cooke went on line in 1912, the plant produced electrical energy that was used 125 miles to the... More
Bishop Creek Hydroelectric System, Plant 2, Lake Sabrina Dam, Bishop C...
Significance: It is significant because of its role in the early engineering concept and construction of the Bishop Creek Hydroelectric System. The dam is essentially unchanged from its date of construction, wi... More
Bishop Creek Hydroelectric System, Plant 2, Lake Sabrina Dam, Bishop C...
Significance: It is significant because of its role in the early engineering concept and construction of the Bishop Creek Hydroelectric System. The dam is essentially unchanged from its date of construction, wi... More
Enloe Dam, On Similkameen River, Oroville, Okanogan County, WA
Significance: Enloe Dam represents an early hydroelectric power generation facility in the Okanogan and Similkameen valleys. Mining and irrigated agriculture, both integral to the local economy, were the chief... More
Enloe Dam, On Similkameen River, Oroville, Okanogan County, WA
Significance: Enloe Dam represents an early hydroelectric power generation facility in the Okanogan and Similkameen valleys. Mining and irrigated agriculture, both integral to the local economy, were the chief... More
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
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
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
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
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
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
Prado Dam, Spillway, Santa Ana River near junction of State Highways 7...
Picryl description: Public domain image of a power dam, cascade, free to use, no copyright restrictions.
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
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
Mountain Dell Dam, Parley's Canyon, Northwest side of I-80, West of St...
Significance: Mountain Dell Dam is an early application of multiple-arch reinforced-concrete construction to dam engineering. The design developed by John S. Eastwood consisted of a series of arches set at an a... More
Elwha River Hydroelectric System, Glines Hydroelectric Dam & Plant, Po...
Unprocessed Field note material exists for this structure: N466 Survey number: HAER WA-130-B