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
Robert B. Morse Water Filtration Plant, 10700 and 10701 Columbia Pike,...
Significance: Constructed by the Washington Suburban Sanitary Commission and opened in 1936, the Robert B. Morse Water Filtration Plant is significant for its unique filter assembly designed by Chief Engineer R... More
Roosevelt Power Canal & Diversion Dam, Parallels Salt River, Roosevelt...
Significance: The Roosevelt Power Canal was built as an integral part of the Salt River Project and represents the U. S. Reclamation Service's first involvement in the construction of hydroelectric power facili... More
Skagit Power Development, Ross Dam, 11.0 miles upstream from Newhalem ...
Picryl description: Public domain image of a power dam, cascade, free to use, no copyright restrictions.
High Mountain Dams in Bonneville Unit, Crystal Lake Dam, Wasatch Natio...
Significance: The small dam on Crystal Lake is predated only by those on Wall, Washington and Trial lakes in the Bonneville Unit. A typical earth-fill structure, the dam is presently among the most deteriorate... More
Upper Mississippi River 9-Foot Channel, Lock & Dam No. 6, Trempealeau,...
Significance: The Upper Mississippi River Lock and Dam Project represents one of the largest and most ambitious of such undertakings. With roots in the Progressive Era, the project was adopted by New Deal prop... More
Mississippi River 9-Foot Channel Project, Lock & Dam No. 12, Upper Mis...
Public domain photograph of train tracks, railroad works, free to use, no copyright restrictions image - Picryl description
Bitter Root Irrigation Project, Como Dam, West of U.S. Highway 93, Dar...
Unprocessed Field note material exists for this structure: N816 Survey number: HAER MT-89-A
Bitter Root Irrigation Project, Como Dam, West of U.S. Highway 93, Dar...
Unprocessed Field note material exists for this structure: N816 Survey number: HAER MT-89-A
Merrimack Canal, Merrimack Dam, Lowell, Middlesex County, MA
Significance: The Merrimack and Rolling Dams were built as part of the third phase of building of the Lowell Canal System, to provide intermediate levels between the Merrimack Canal, on the upper level, and the... 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
Three Bears Lake & Dams, Water Control Box, North of Marias Pass, East...
Survey number: HAER MT-88-C Building/structure dates: 1902 Initial Construction
Grand Gulch Mine, Littlefield, Mohave County, AZ
Significance: The Grand Gulch Mine was established by Samuel L. Adams, Richard Bentley, and other men from the Mormon settlement at St. George, Utah, in the early 1870s to work a vein of rich copper ore called ... 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
Prattville Manufacturing Company, Number One, 242 South Court Street, ...
Significance: Founded in 1846, the Prattville Manufacturing Company was one of the South's earliest textile mills. A spinning and weaving operation from its inception, the original factory was razed when the o... More
Prattville Manufacturing Company, Number One, 242 South Court Street, ...
Significance: Founded in 1846, the Prattville Manufacturing Company was one of the South's earliest textile mills. A spinning and weaving operation from its inception, the original factory was razed when the o... More
Twin Lakes Dam & Outlet Works, Beneath Twin Lakes Reservoir, T11S, R80...
Significance: The dam is a masonry and earth fill structure with four large concrete culverts that serve as outlet works. James D. Schuyler, noted dam engineer, developed the final design. The structure is also... More
James River & Kanawha Canal, South River Dam & Lock, Maury River, Lexi...
Significance: Located on the western bank of the Maury River (formerly the North River) approximately one-quarter mile upstream from its junction with the South River. In its present condition, the dam is appr... More
Rapide Croche Lock & Dam, At 22.8 mile marker on Lower Fox River, Wrig...
Significance: The Rapide Croche Lock and Dam Complex allowed water navigation around rapids in the Fox River for boats traveling between Kaukauna and Green Bay. This complex served as an integral part of the Lo... 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
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
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
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
Marsh-Billings-Rockefeller Carriage Roads, Woodstock, Windsor County, ...
Significance: The result of Frederick Billings's efforts was a network of carriage roads giving access to the estate for utilitarian purposes, as well as providing a pleasurable encounter with the landscape. T... 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
Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...
Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More
Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...
Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More
Starved Rock Locks & Dam, Illinois Waterway River mile 231, Peru, La S...
Significance: Starved Rock Lock and Dam consists of a 1,310' straight-crested, reinforced-concrete gravity dam and a 110' x 600' Ohio River Standard lock with horizontally framed miter gates. A 518' headgate s... More
Upper Mississippi River 9-Foot Channel Project, Lock & Dam No. 3, Red ...
Picryl description: Public domain image of a bridge, water, historic structure, free to use, no copyright restrictions.
Upper Mississippi River 9-Foot Channel Project, Lock & Dam No. 3, Red ...
Public domain photograph - historical image of Mississippi, United States, free to use, no copyright restrictions image - Picryl description
Upper Mississippi River 9-Foot Channel Project, Lock & Dam No. 3, Red ...
Public domain photo of a monument, historic place, free to use, no copyright restrictions image - Picryl description
Tieton Dam, South & East of State Highway 12, Naches, Yakima County, W...
Significance: At the time of its completion in 1925, the Tieton Dam was the highest earthfill dam in the world. "Two of the foremost engineers in Western water development, Frank Crowe and Frank Weymouth, were... More
Tieton Dam, South & East of State Highway 12, Naches, Yakima County, W...
Significance: At the time of its completion in 1925, the Tieton Dam was the highest earthfill dam in the world. "Two of the foremost engineers in Western water development, Frank Crowe and Frank Weymouth, were... More
Swan Falls Dam, Snake River, Kuna, Ada County, ID
Public domain photograph of a machine part, motor, equipment, free to use, no copyright restrictions image - Picryl description
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
Upper Mississippi River 9-Foot Channel Project, Lock & Dam No. 7, Dres...
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
Upper Mississippi River 9-Foot Channel Project, Lock & Dam No. 7, Dres...
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
Upper Mississippi River 9-Foot Channel Project, Lock & Dam No. 7, Dres...
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
Upper Mississippi River 9-Foot Channel Project, Lock & Dam No. 7, Dres...
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
Grand Valley Diversion Dam, Half a mile north of intersection of I-70 ...
Significance: Constructed between 1913 and 1916, the dam is the key structure of the Bureau of Reclamation's Grand Valley Project, which provides water to 42,000 acres of semi-arid land. At the time of its comp... More
New Croton Dam & Reservoir, Croton River, Croton-on-Hudson, Westcheste...
Picryl description: Public domain image of a power dam, cascade, free to use, no copyright restrictions.
Coolidge Dam, Gila River, Peridot, Gila County, AZ - Bureau of Indian ...
Significance: Coolidge Dam remedied the water needs of the Pima and Maricopa Tribes on the Gila River Reservation, and also provided water for the neighboring Anglo community. Structurally, Coolidge Dam was th... More
Coolidge Dam, Gila River, Peridot, Gila County, AZ - Bureau of Indian ...
Significance: Coolidge Dam remedied the water needs of the Pima and Maricopa Tribes on the Gila River Reservation, and also provided water for the neighboring Anglo community. Structurally, Coolidge Dam was th... More
Upper Mississippi River 9-Foot Channel Project, Lock & Dam No. 5A, Win...
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
Prado Dam, Spillway, Santa Ana River near junction of State Highways 7...
Public domain scan of architectural drawing, architecture, free to use, no copyright restrictions image - Picryl description
Prado Dam, Spillway, Santa Ana River near junction of State Highways 7...
Public domain scan of an architecture diagram, plan, or drawing, free to use, no copyright restrictions - Picryl description.
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
Illinois Waterway, Lockport Lock, Dam and Power House, 2502 Channel Dr...
Significance: The Lockport Lock, Dam and Power House Historic District is significant both for its role in navigation of the Chicago Sanitary and Ship Canal and the Illinois Waterway and for the vertical lift l... More
Bonneville Project, Bonneville Dam, Columbia River, Bonneville, Multno...
Survey number: HAER OR-11-F Building/structure dates: 1937 Initial Construction
Bonneville Project, Bonneville Dam, Columbia River, Bonneville, Multno...
Survey number: HAER OR-11-F Building/structure dates: 1937 Initial Construction