Rainbow Hydroelectric Facility, Two Stall Garage, On north bank of Mis...
Significance: It is significant for its association with the industrial development of Montana and the consolidation of most of Montana's electric industry into the Montana Power Company. The district is also a... More
Mississippi River 9-Foot Channel Project, Lock & Dam No. 11, Upper Mis...
Significance: The U.S. Army Corps of Engineers Nine-Foot Channel Project (1927-1940) represents the culmination of a 100-year effort to improve the navigability of the Upper Mississippi River between the mouth ... More
Mississippi River 9-Foot Channel Project, Lock & Dam No. 11, Upper Mis...
Significance: The U.S. Army Corps of Engineers Nine-Foot Channel Project (1927-1940) represents the culmination of a 100-year effort to improve the navigability of the Upper Mississippi River between the mouth ... More
Mississippi River 9-Foot Channel Project, Lock & Dam No. 11, Upper Mis...
Significance: The U.S. Army Corps of Engineers Nine-Foot Channel Project (1927-1940) represents the culmination of a 100-year effort to improve the navigability of the Upper Mississippi River between the mouth ... More
Mississippi River 9-Foot Channel Project, Lock & Dam No. 11, Upper Mis...
Significance: The U.S. Army Corps of Engineers Nine-Foot Channel Project (1927-1940) represents the culmination of a 100-year effort to improve the navigability of the Upper Mississippi River between the mouth ... 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 rural landscape with a watermill, water, decayed building, 18th, 19th century architecture, 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
Kachess Dam, 1936 Spillway and Radial Gates, Kachess River, 1.5 miles ...
Survey number: HAER WA-79-B Public domain photograph - historical image of Washington State, United States, free to use, no copyright restrictions image - Picryl description
Kachess Dam, 1936 Spillway and Radial Gates, Kachess River, 1.5 miles ...
Survey number: HAER WA-79-B Public domain photograph - historical image of Washington State, United States, free to use, no copyright restrictions image - Picryl description
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
Prado Dam, Embankment, Santa Ana River near junction of State Highways...
Significance: The construction of Prado Dam was a significant event in the history of flood control in southern California and specifically Orange County. The Dam has played a vital role in the economies and d... More
Prado Dam, Embankment, Santa Ana River near junction of State Highways...
Significance: The construction of Prado Dam was a significant event in the history of flood control in southern California and specifically Orange County. The Dam has played a vital role in the economies and d... More
Prado Dam, Embankment, Santa Ana River near junction of State Highways...
Significance: The construction of Prado Dam was a significant event in the history of flood control in southern California and specifically Orange County. The Dam has played a vital role in the economies and d... More
Swan Falls Dam, Storage Shed B, Snake River, Kuna, Ada County, ID
For written descriptive information, see narrative report on Swan Falls Dam, HAER ID-20. Significance: Swan Falls Dam was the first hydroelectric dam on Snake River in Idaho, and one of the earliest built in th... 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
Chicago Sanitary and Ship Canal, Lockport Power House and Dam, 2502 Ch...
Significance: The Lockport Power House and Dam were built as part of an extension to the Chicago Sanitary and Ship Canal after the Illinois State Legislature authorized the Sanitary District to develop a water ... 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
Echeta Dam & Reservoir, 2.9 miles east of Echeta Road at Echeta Railro...
Public domain photograph - historical image of Nevada, United States, free to use, no copyright restrictions image - Picryl description
Echeta Dam & Reservoir, 2.9 miles east of Echeta Road at Echeta Railro...
Public domain photograph - historical image of Nevada, United States, free to use, no copyright restrictions image - Picryl description
Ohio River Lock & Dam No. 12, Wheeling, Ohio County, WV
Survey number: HAER WV-89 Public domain photograph - historical image of Ohio, United States, free to use, no copyright restrictions image - Picryl description
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
Sock Road Bridge, Spanning Beaver Dam River, Lowell, Dodge County, WI
Significance: One of the oldest metal truss bridges in the state, it may have been one of the earliest truss spans manufactured by the E. Kunert Manufacturing Company (1888-1915) of Watertown, Wisconsin. Offer... More
Sock Road Bridge, Spanning Beaver Dam River, Lowell, Dodge County, WI
Significance: One of the oldest metal truss bridges in the state, it may have been one of the earliest truss spans manufactured by the E. Kunert Manufacturing Company (1888-1915) of Watertown, Wisconsin. Offer... 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
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
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
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
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
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
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
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
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
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
Wagamon Pond Dam & Bridge, Spanning Broadkill River at State Road No. ...
Significance: The structure is a combination dam and water control structure of an unusual type. The existing system has evolved through a series of reconstructions since the first bridge was replaced in 1815 ... More
Rainbow Hydroelectric Facility, Clubhouse, On north bank of Missouri R...
Significance: It is significant for its association with the industrial development of Montana and the consolidation of most of Montana's electric industry into the Montana Power Company. The district is also a... More
Gull Lake Reservoir Dam, Lake Shore, Cass County, MN
Public domain scan of architectural drawing, architecture, free to use, no copyright restrictions image - Picryl description
Prado Dam, Santa Ana River near junction of State Highways 71 & 91, Co...
Significance: The construction of Prado Dam was a significant event in the history of flood control in southern California and specifically Orange County. The Dam has played a vital role in the economies and d... More
Prado Dam, Santa Ana River near junction of State Highways 71 & 91, Co...
Significance: The construction of Prado Dam was a significant event in the history of flood control in southern California and specifically Orange County. The Dam has played a vital role in the economies and d... More
Rainbow Hydroelectric Facility, Tool House, On north bank of Missouri ...
Significance: It is significant for its association with the industrial development of Montana and the consolidation of most of Montana's electric industry into the Montana Power Company. The district is also a... More
Caleb Crosby Threshing Barn, Noeton (moved to Norris Dam State Park, L...
Unprocessed Field note material exists for this structure: FN-38 Survey number: HABS TN-159-A Building/structure dates: 1974
Caleb Crosby Threshing Barn, Noeton (moved to Norris Dam State Park, L...
Unprocessed Field note material exists for this structure: FN-38 Survey number: HABS TN-159-A Building/structure dates: 1974
Caleb Crosby Threshing Barn, Noeton (moved to Norris Dam State Park, L...
Unprocessed Field note material exists for this structure: FN-38 Survey number: HABS TN-159-A Building/structure dates: 1974
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
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
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
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
Gene Wash Reservoir & Dam, 2 miles west of Parker Dam, Parker Dam, San...
Survey number: HAER CA-241 Public domain photograph - historical image of California, United States, free to use, no copyright restrictions image - Picryl description
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
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
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
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
Mississippi River 9-Foot Channel Project, Lock & Dam No. 12, Upper Mis...
Picryl description: Public domain photograph of a dock, harbor, boats, water, free to use, no copyright restrictions.
Mississippi River 9-Foot Channel Project, Lock & Dam No. 12, Upper Mis...
Public domain scan of settlement or building architecture plan, free to use, no copyright restrictions image - Picryl description
Upper Souris National Wildlife Refuge, Dam 83, Souris River Basin, Fox...
Significance: The dams within the Upper Souris 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 co... More
Upper Souris National Wildlife Refuge, Dam 83, Souris River Basin, Fox...
Significance: The dams within the Upper Souris 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 co... More
Beaver Dam Road Bridge, Spanning Rock River, on Beaver Dam Road, Addis...
Significance: The Beaver Dam Road Bridge is a representative example of a Wisconsin bedstead truss highway bridge. It is identical to a bedstead truss in Allentown, Wisconsin, built by the Milwaukee Bridge and... More
Macombs Dam Bridge, Spanning Harlem River Between 155th Street Viaduct...
Significance: The bridge was designed by eminent structural engineer Alfred Pancoast Boller and was a considerable municipal endeavor as well as a significant engineering feat. It is the third oldest major bri... More
Macombs Dam Bridge, Spanning Harlem River Between 155th Street Viaduct...
Significance: The bridge was designed by eminent structural engineer Alfred Pancoast Boller and was a considerable municipal endeavor as well as a significant engineering feat. It is the third oldest major bri... More
Macombs Dam Bridge, Spanning Harlem River Between 155th Street Viaduct...
Significance: The bridge was designed by eminent structural engineer Alfred Pancoast Boller and was a considerable municipal endeavor as well as a significant engineering feat. It is the third oldest major bri... More
Macombs Dam Bridge, Spanning Harlem River Between 155th Street Viaduct...
Significance: The bridge was designed by eminent structural engineer Alfred Pancoast Boller and was a considerable municipal endeavor as well as a significant engineering feat. It is the third oldest major bri... More
Macombs Dam Bridge, Spanning Harlem River Between 155th Street Viaduct...
Significance: The bridge was designed by eminent structural engineer Alfred Pancoast Boller and was a considerable municipal endeavor as well as a significant engineering feat. It is the third oldest major bri... More
Macombs Dam Bridge, Spanning Harlem River Between 155th Street Viaduct...
Significance: The bridge was designed by eminent structural engineer Alfred Pancoast Boller and was a considerable municipal endeavor as well as a significant engineering feat. It is the third oldest major bri... More
Macombs Dam Bridge, Spanning Harlem River Between 155th Street Viaduct...
Significance: The bridge was designed by eminent structural engineer Alfred Pancoast Boller and was a considerable municipal endeavor as well as a significant engineering feat. It is the third oldest major bri... More
Macombs Dam Bridge, Spanning Harlem River Between 155th Street Viaduct...
Significance: The bridge was designed by eminent structural engineer Alfred Pancoast Boller and was a considerable municipal endeavor as well as a significant engineering feat. It is the third oldest major bri... More
Macombs Dam Bridge, Spanning Harlem River Between 155th Street Viaduct...
Significance: The bridge was designed by eminent structural engineer Alfred Pancoast Boller and was a considerable municipal endeavor as well as a significant engineering feat. It is the third oldest major bri... More
Macombs Dam Bridge, Spanning Harlem River Between 155th Street Viaduct...
Significance: The bridge was designed by eminent structural engineer Alfred Pancoast Boller and was a considerable municipal endeavor as well as a significant engineering feat. It is the third oldest major bri... More
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
Butt Valley Dam, Gate Tender's House, Butt Valley Reservoir Road, Cari...
Significance: Butt Valley Dam Gate Tender's House was built by GPW for the use of its employees. The house's most noteworthy resident was Ben Goon, a long-time GPW employee and well-respected gate tender and p... More
Souther Tide Mill Dam, 610 Southern Artery, Quincy, Norfolk County, MA
Significance: It is significant as a relatively well-preserved example of a once common and now rare type of mill dam. Built ca. 1806 for Ebenezer Thayer, it is associated with the Souther Tide Mill which is o... More
Rainbow Hydroelectric Facility, Ten Stall Garage, On north bank of Mis...
Significance: It is significant for its association with the industrial development of Montana and the consolidation of most of Montana's electric industry into the Montana Power Company. The district is also a... More
Big Dalton Dam, 2600 Big Dalton Canyon Road, Glendora, Los Angeles Cou...
Significance: The dam was built as part of a flood control and water conservation program in Los Angeles County to protect the growing community and provide water as the demand increased. The dam was designed ... More
Holt Lock & Dam, Warrior River, Holt, Tuscaloosa County, AL
Significance: This structure includes a lock against the left bank with inside chamber dimensions of 110 by 600 feet, a maximum lift of 64 feet, and a spillway controlled by 14 individually-operated tainter gat... More
Butt Valley Dam, Gate Tender's Shed, Butt Valley Reservoir Road, Carib...
Significance: Butt Valley Dam Gate Tender's Shed was built as part of a dam-related residential complex which also includes a gate tender's house, constructed in 1922-23, and a barn. The shed is significant as... More
Meadow Road Bridge, Spanning Beaver Dam River at Meadow Road, Lowell, ...
Picryl description: Public domain image of a bridge over a water stream, free to use, no copyright restrictions.
Big Tujunga Dam, 809 West Big Tujunga Road, Sunland, Los Angeles Count...
Significance: The dam was built as part of a flood control and water conservation program in Los Angeles County to protect the growing community and provide water as the demand increased. Construction of the d... More
Sandy Lake Reservoir Dam & Lock, Lockhouse, McGregor, Aitkin County, M...
Survey number: HAER MN-69-A Public domain photograph - historical image of Minnesota, United States, free to use, no copyright restrictions image - Picryl description
Wood's Grist Mill, South bank of Indian River, 1 mile east of Breached...
Significance: Although consisting largely of ruins, Woods MIll still possesses the ability to stand as a representative example of a grist milling enterprise, an industrial activity widespread in rural Jefferso... More
Wood's Grist Mill, South bank of Indian River, 1 mile east of Breached...
Significance: Although consisting largely of ruins, Woods MIll still possesses the ability to stand as a representative example of a grist milling enterprise, an industrial activity widespread in rural Jefferso... More
Brighton Grange Hall, 263 Brighton Dam Road at New Hampshire Avenue, B...
Significance: The only extant Grange Hall in Montgomery County, and one of the few in the State. Its presence at the crossroads of this small farming community was a reflection of the economic development of th... More
Brighton Grange Hall, 263 Brighton Dam Road at New Hampshire Avenue, B...
Significance: The only extant Grange Hall in Montgomery County, and one of the few in the State. Its presence at the crossroads of this small farming community was a reflection of the economic development of th... 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
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
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
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
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
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