High Mountain Dams in Bonneville Unit, Long Lake Dam, Wasatch National...
Significance: Construction of Long Lake Dam was undertaken in 1923 by the Provo Reservoir Company to augment water flow through its canal to the pumping station completed that same year at the Jordan Narrows. ... More
High Mountain Dams in Upalco Unit, Twin Pots Dam, Ashley National Fore...
Significance: At the time of its initial construction in 1921, the Twin Pots Dam not only held the largest body of impounded water in the Upalco Unit, it was the first successful attempt to impound running wate... More
High Mountain Dams in Upalco Unit, Twin Pots Dam, Ashley National Fore...
Significance: At the time of its initial construction in 1921, the Twin Pots Dam not only held the largest body of impounded water in the Upalco Unit, it was the first successful attempt to impound running wate... More
Bear Trap Dam, State Route 115, Stoddartsville, Luzerne County, PA
Significance: The dam is the best preserved example of the two remaining dams from a one-way slack water navigation system for carrying coal, lumber, and milled products down the Lehigh River. Developed by Josi... More
Forge Creek Dam-John Cable Mill, Townsend, Blount County, TN
Significance: The John Cable Mill, powered by an overshot water wheel, is an example of one of the six methods of making meal to be found in the Great Smoky Mountains National Park. The other methods are the I... More
Forge Creek Dam-John Cable Mill, Townsend, Blount County, TN
Significance: The John Cable Mill, powered by an overshot water wheel, is an example of one of the six methods of making meal to be found in the Great Smoky Mountains National Park. The other methods are the I... More
Forge Creek Dam-John Cable Mill, Townsend, Blount County, TN
Significance: The John Cable Mill, powered by an overshot water wheel, is an example of one of the six methods of making meal to be found in the Great Smoky Mountains National Park. The other methods are the I... More
Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, C...
Significance: The Ouachita River Lock and Dam No. 8 is one of the oldest remaining locks and dams in the State of Arkansas. It represents a vital segment in the earliest attempt by the U.S. Army Corps of Engin... More
Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, C...
Significance: The Ouachita River Lock and Dam No. 8 is one of the oldest remaining locks and dams in the State of Arkansas. It represents a vital segment in the earliest attempt by the U.S. Army Corps of Engin... More
Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, C...
Significance: The Ouachita River Lock and Dam No. 8 is one of the oldest remaining locks and dams in the State of Arkansas. It represents a vital segment in the earliest attempt by the U.S. Army Corps of Engin... More
Appleton Locks & Dams, Fox River at Oneida Street, Appleton, Outagamie...
Significance: The Appleton Locks and Dams Complex allows passage for watercraft around 1 1/2 miles of rapids as well as a 4 foot falls present in the Lower Fox River at Appleton. Survey number: HAER WI-84 Bui... More
Appleton Locks & Dams, Fox River at Oneida Street, Appleton, Outagamie...
Significance: The Appleton Locks and Dams Complex allows passage for watercraft around 1 1/2 miles of rapids as well as a 4 foot falls present in the Lower Fox River at Appleton. Survey number: HAER WI-84 Bui... More
Appleton Locks & Dams, Fox River at Oneida Street, Appleton, Outagamie...
Significance: The Appleton Locks and Dams Complex allows passage for watercraft around 1 1/2 miles of rapids as well as a 4 foot falls present in the Lower Fox River at Appleton. Survey number: HAER WI-84 Bui... More
Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 ...
Significance: Milner Dam and its canal system have national significance in agricultural history as a rare successful example of state-supervised private irrigation development provided for in Senator Joseph M.... More
Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 ...
Significance: Milner Dam and its canal system have national significance in agricultural history as a rare successful example of state-supervised private irrigation development provided for in Senator Joseph M.... More
Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 ...
Significance: Milner Dam and its canal system have national significance in agricultural history as a rare successful example of state-supervised private irrigation development provided for in Senator Joseph M.... More
Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 ...
Significance: Milner Dam and its canal system have national significance in agricultural history as a rare successful example of state-supervised private irrigation development provided for in Senator Joseph M.... More
Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 ...
Significance: Milner Dam and its canal system have national significance in agricultural history as a rare successful example of state-supervised private irrigation development provided for in Senator Joseph M.... More
Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 ...
Significance: Milner Dam and its canal system have national significance in agricultural history as a rare successful example of state-supervised private irrigation development provided for in Senator Joseph M.... More
Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 ...
Significance: Milner Dam and its canal system have national significance in agricultural history as a rare successful example of state-supervised private irrigation development provided for in Senator Joseph M.... More
Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 ...
Significance: Milner Dam and its canal system have national significance in agricultural history as a rare successful example of state-supervised private irrigation development provided for in Senator Joseph M.... More
Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 ...
Significance: Milner Dam and its canal system have national significance in agricultural history as a rare successful example of state-supervised private irrigation development provided for in Senator Joseph M.... More
Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 ...
Significance: Milner Dam and its canal system have national significance in agricultural history as a rare successful example of state-supervised private irrigation development provided for in Senator Joseph M.... More
Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 ...
Significance: Milner Dam and its canal system have national significance in agricultural history as a rare successful example of state-supervised private irrigation development provided for in Senator Joseph M.... More
Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 ...
Significance: Milner Dam and its canal system have national significance in agricultural history as a rare successful example of state-supervised private irrigation development provided for in Senator Joseph M.... More
Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 ...
Significance: Milner Dam and its canal system have national significance in agricultural history as a rare successful example of state-supervised private irrigation development provided for in Senator Joseph M.... More
Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 ...
Significance: Milner Dam and its canal system have national significance in agricultural history as a rare successful example of state-supervised private irrigation development provided for in Senator Joseph M.... More
Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 ...
Significance: Milner Dam and its canal system have national significance in agricultural history as a rare successful example of state-supervised private irrigation development provided for in Senator Joseph M.... More
Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 ...
Significance: Milner Dam and its canal system have national significance in agricultural history as a rare successful example of state-supervised private irrigation development provided for in Senator Joseph M.... More
Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 ...
Significance: Milner Dam and its canal system have national significance in agricultural history as a rare successful example of state-supervised private irrigation development provided for in Senator Joseph M.... More
Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 ...
Significance: Milner Dam and its canal system have national significance in agricultural history as a rare successful example of state-supervised private irrigation development provided for in Senator Joseph M.... More
Hofmann Dam, Riverside, Cook County, IL
Survey number: HAER IL-163 Building/structure dates: 1908 Initial Construction Building/structure dates: 1936 Subsequent Work Building/structure dates: 1950 Subsequent Work
St. Lucie Canal, St. Lucie Lock No. 1, St. Lucie, Cross State Canal, O...
Significance: Engineered by the U.S. Army Corps of Engineers, Jacksonville Office in 1937, St. Lucie Lock and Dam was designed for preventive measures during hurricanes, floods, and droughts while allowing navi... More
St. Lucie Canal, St. Lucie Lock No. 1, St. Lucie, Cross State Canal, O...
Significance: Engineered by the U.S. Army Corps of Engineers, Jacksonville Office in 1937, St. Lucie Lock and Dam was designed for preventive measures during hurricanes, floods, and droughts while allowing navi... More
Tulloch Mill, Stanislaus River, Knights Ferry, Stanislaus County, CA
See also HABS Nos. CA-165 & CA-168 for related structures. Documentation for Tulloch Mill and Powerhouse (previously HABS CA-159) was combined at some date prior to 9/2006. Unprocessed Field note material exis... More
Tulloch Mill, Stanislaus River, Knights Ferry, Stanislaus County, CA
See also HABS Nos. CA-165 & CA-168 for related structures. Documentation for Tulloch Mill and Powerhouse (previously HABS CA-159) was combined at some date prior to 9/2006. Unprocessed Field note material exis... More
Diversion Dam via Mesa, Arizona, Panoramic Photograph
H104956 U.S. Copyright Office Copyright deposit; California Panorama Co.; January 21, 1908. Copyright claimant's address: Los Angeles. Granite Reef diversion dam of the Salt River Project.
Two Mile Reservoir, Santa Fe River, intersection of Canyon & Cerro Gor...
Documentation produced as part of the Southwestern Water Resources Project. Significance: Two Mile Dam, constructed in Santa Fe, New Mexico in 1893, embodies the distinct characteristics of a tamped earth dam, ... More
Woodville Canal Company, West side of Snake River (River Mile 796), Wo...
Significance: The Woodville Canal Company represents one of the few remaining small-scale canal companies operating in eastern Idaho that continues to be administered and managed by district farmers. The Woodv... More
Little Chute Lock & Dam, Fox River at Mill Street, Little Chute, Outag...
Significance: The Little Chute Locks and Dam Complex allowed passage for water craft in an otherwise unnavigable stretch of the Fox River at Little Chute created by a 36 foot drop in elevation in a little under... More
Little Chute Lock & Dam, Fox River at Mill Street, Little Chute, Outag...
Significance: The Little Chute Locks and Dam Complex allowed passage for water craft in an otherwise unnavigable stretch of the Fox River at Little Chute created by a 36 foot drop in elevation in a little under... More
Little Chute Lock & Dam, Fox River at Mill Street, Little Chute, Outag...
Significance: The Little Chute Locks and Dam Complex allowed passage for water craft in an otherwise unnavigable stretch of the Fox River at Little Chute created by a 36 foot drop in elevation in a little under... More
Little Chute Lock & Dam, Fox River at Mill Street, Little Chute, Outag...
Significance: The Little Chute Locks and Dam Complex allowed passage for water craft in an otherwise unnavigable stretch of the Fox River at Little Chute created by a 36 foot drop in elevation in a little under... 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
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
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
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
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
Strawberry Valley Project, Payson, Utah County, UT
Significance: As the first project built by the U.S. Reclamation Service in Utah, the Strawberry Valley Project had a major impact on the State. It represents the beginning of Federal assistance in water devel... More
Strawberry Valley Project, Payson, Utah County, UT
Significance: As the first project built by the U.S. Reclamation Service in Utah, the Strawberry Valley Project had a major impact on the State. It represents the beginning of Federal assistance in water devel... More
Strawberry Valley Project, Payson, Utah County, UT
Significance: As the first project built by the U.S. Reclamation Service in Utah, the Strawberry Valley Project had a major impact on the State. It represents the beginning of Federal assistance in water devel... More
Strawberry Valley Project, Payson, Utah County, UT
Significance: As the first project built by the U.S. Reclamation Service in Utah, the Strawberry Valley Project had a major impact on the State. It represents the beginning of Federal assistance in water devel... More
Strawberry Valley Project, Payson, Utah County, UT
Significance: As the first project built by the U.S. Reclamation Service in Utah, the Strawberry Valley Project had a major impact on the State. It represents the beginning of Federal assistance in water devel... More
Strawberry Valley Project, Payson, Utah County, UT
Significance: As the first project built by the U.S. Reclamation Service in Utah, the Strawberry Valley Project had a major impact on the State. It represents the beginning of Federal assistance in water devel... More
Strawberry Valley Project, Payson, Utah County, UT
Significance: As the first project built by the U.S. Reclamation Service in Utah, the Strawberry Valley Project had a major impact on the State. It represents the beginning of Federal assistance in water devel... 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
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
Vesuvius Dam, Across Storms Creek near intersection of County Roads 20...
Significance: It is significant for its historical associations with the CCC in the U.S. Forest Service's development of Wayne National Forest. It is an important reminder of the early 20th century development ... 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
Kern Island canal head gate, 2 1/2 miles N.E. of Bakersfield, Kern Cou...
Canal with wooden dam(?), Kern County, California. W276 Watkins' new series. Exhibited: "California : The Art of Water" at the Cantor Arts Center at Stanford University, Stanford, California, July - November 2016.
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
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
Three Bears Lake & Dams, North of Marias Pass, East Glacier Park, Glac...
Significance: The dam was an earthen dam/wooden pipe water collection/distribution system that serviced locomotives for the Great Northern Railroad. Survey number: HAER MT-88 Building/structure dates: 1902 In... More
Three Bears Lake & Dams, North of Marias Pass, East Glacier Park, Glac...
Significance: The dam was an earthen dam/wooden pipe water collection/distribution system that serviced locomotives for the Great Northern Railroad. Survey number: HAER MT-88 Building/structure dates: 1902 In... 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
Patent Drawing of Engine - Roosevelt Power Canal & Diversion Dam, Para...
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
Snake River Valley Irrigation District, East Side of Snake River (Rive...
Significance: The Snake River Valley Irrigation District is an example of an early irrigation district that was formed to provide more effective management of the Cedar Point, Snake River Valley, West Branch, ... 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
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
Bailey's Dam, Red River, Alexandria, Rapides Parish, LA
Significance: This 100-year-old dam is significant in that there has been no development in the area since the 1860s. Survey number: HAER LA-6 Building/structure dates: 1864 Initial Construction
Bailey's Dam, Red River, Alexandria, Rapides Parish, LA
Significance: This 100-year-old dam is significant in that there has been no development in the area since the 1860s. Survey number: HAER LA-6 Building/structure dates: 1864 Initial Construction
Bailey's Dam, Red River, Alexandria, Rapides Parish, LA
Significance: This 100-year-old dam is significant in that there has been no development in the area since the 1860s. Survey number: HAER LA-6 Building/structure dates: 1864 Initial Construction
High Mountain Dams in Upalco Unit, Kidney Lake Dam, Ashley National Fo...
Significance: Kidney Lake is by far the largest of the reservoired high mountain lakes in the Upalco Unit of the Central Utah Project. One of three lakes in the Brown Duck Basin dammed by the Farnsworth Irriga... More
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
Bitter Root Irrigation Project, Rock Creek Diversion Dam, One mile eas...
Unprocessed Field note material exists for this structure: N817 Survey number: HAER MT-89-B
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
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
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
Mississippi River 9-Foot Channel Project, Lock & Dam No. 12, Upper Mis...
Picryl description: Public domain image of a bridge, water, historic structure, free to use, no copyright restrictions.
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
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
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
High Mountain Dams in Bonneville Unit, Trial Lake Dam, Kamas, Summit C...
Significance: Trial Lake is the second largest body of water to be reservoired in the Bonneville Unit of the Central Utah Project. Its dam, built cooperatively by four of the principal regional irrigation comp... 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