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Coolidge Dam, Gila River, Peridot, Gila County, AZ - Bureau of Indian Affairs

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, Winona, Winona County, MN

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

Upper Mississippi River 9-Foot Channel Project, Lock & Dam No. 5A, Winona, Winona County, MN

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

Upper Mississippi River 9-Foot Channel Project, Lock & Dam No. 5A, Winona, Winona County, MN

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

Upper Mississippi River 9-Foot Channel Project, Lock & Dam No. 5A, Winona, Winona County, MN

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

Upper Mississippi River 9-Foot Channel Project, Lock & Dam No. 5A, Winona, Winona County, MN

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

Upper Mississippi River 9-Foot Channel Project, Lock & Dam No. 5A, Winona, Winona County, MN

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

Upper Mississippi River 9-Foot Channel Project, Lock & Dam No. 5, Minneiska, Winona County, MN

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

Upper Mississippi River 9-Foot Channel Project, Lock & Dam No. 5, Minneiska, Winona County, MN

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

Upper Mississippi River 9-Foot Channel Project, Lock & Dam No. 5, Minneiska, Winona County, MN

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

Upper Mississippi River 9-Foot Channel Project, Lock & Dam No. 5, Minneiska, Winona County, MN

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

Upper Mississippi River 9-Foot Channel Project, Lock & Dam No. 5, Minneiska, Winona County, MN

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

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

Continental Gin Company, Prattville, Autauga County, AL

Continental Gin Company, Prattville, Autauga County, AL

Significance: The site was acquired by Daniel Pratt in 1838, and he soon established grist and lumber and shingle mills there. By 1844, he had opened a cotton gin plant, the products of which were in great dem... More

Continental Gin Company, Prattville, Autauga County, AL

Continental Gin Company, Prattville, Autauga County, AL

Significance: The site was acquired by Daniel Pratt in 1838, and he soon established grist and lumber and shingle mills there. By 1844, he had opened a cotton gin plant, the products of which were in great dem... More

Continental Gin Company, Prattville, Autauga County, AL

Continental Gin Company, Prattville, Autauga County, AL

Significance: The site was acquired by Daniel Pratt in 1838, and he soon established grist and lumber and shingle mills there. By 1844, he had opened a cotton gin plant, the products of which were in great dem... More

Continental Gin Company, Prattville, Autauga County, AL

Continental Gin Company, Prattville, Autauga County, AL

Significance: The site was acquired by Daniel Pratt in 1838, and he soon established grist and lumber and shingle mills there. By 1844, he had opened a cotton gin plant, the products of which were in great dem... More

Eads Bridge, Spanning Mississippi River at Washington Street, Saint Louis, Independent City, MO

Eads Bridge, Spanning Mississippi River at Washington Street, Saint Lo...

Picryl description: Public domain image of a bridge, water, historic structure, free to use, no copyright restrictions.

Eads Bridge, Spanning Mississippi River at Washington Street, Saint Louis, Independent City, MO

Eads Bridge, Spanning Mississippi River at Washington Street, Saint Lo...

Public domain photograph of industrial architecture, factory building, free to use, no copyright restrictions image - Picryl description

Eads Bridge, Spanning Mississippi River at Washington Street, Saint Louis, Independent City, MO

Eads Bridge, Spanning Mississippi River at Washington Street, Saint Lo...

Picryl description: Public domain image of an arch stone structure, bridge, or tunnel, free to use, no copyright restrictions.

Slater Mill, Pawtucket, Providence County, RI

Slater Mill, Pawtucket, Providence County, RI

For additional documentation, see also Slater Mill (HABS RI-82). Significance: The Slater Mill was the first successful cotton factory, and the first water powered spinning mill using the Arkwright system of ca... More

Slater Mill, Pawtucket, Providence County, RI

Slater Mill, Pawtucket, Providence County, RI

For additional documentation, see also Slater Mill (HABS RI-82). Significance: The Slater Mill was the first successful cotton factory, and the first water powered spinning mill using the Arkwright system of ca... More

Slater Mill, Pawtucket, Providence County, RI

Slater Mill, Pawtucket, Providence County, RI

For additional documentation, see also Slater Mill (HABS RI-82). Significance: The Slater Mill was the first successful cotton factory, and the first water powered spinning mill using the Arkwright system of ca... More

Slater Mill, Pawtucket, Providence County, RI

Slater Mill, Pawtucket, Providence County, RI

For additional documentation, see also Slater Mill (HABS RI-82). Significance: The Slater Mill was the first successful cotton factory, and the first water powered spinning mill using the Arkwright system of ca... More

Slater Mill, Pawtucket, Providence County, RI

Slater Mill, Pawtucket, Providence County, RI

For additional documentation, see also Slater Mill (HABS RI-82). Significance: The Slater Mill was the first successful cotton factory, and the first water powered spinning mill using the Arkwright system of ca... More

Slater Mill, Pawtucket, Providence County, RI

Slater Mill, Pawtucket, Providence County, RI

For additional documentation, see also Slater Mill (HABS RI-82). Significance: The Slater Mill was the first successful cotton factory, and the first water powered spinning mill using the Arkwright system of ca... More

Slater Mill, Pawtucket, Providence County, RI

Slater Mill, Pawtucket, Providence County, RI

For additional documentation, see also Slater Mill (HABS RI-82). Significance: The Slater Mill was the first successful cotton factory, and the first water powered spinning mill using the Arkwright system of ca... More

Slater Mill, Pawtucket, Providence County, RI

Slater Mill, Pawtucket, Providence County, RI

For additional documentation, see also Slater Mill (HABS RI-82). Significance: The Slater Mill was the first successful cotton factory, and the first water powered spinning mill using the Arkwright system of ca... More

Great Falls S. U. M. Historic District, Oliver Street, Paterson, Passaic County, NJ

Great Falls S. U. M. Historic District, Oliver Street, Paterson, Passa...

Significance: In 1791 Alexander Hamilton and others founded an industrial venture known as the Society for the Establishment of Useful Manufactures (S.U.M.). The formation of this Society embodied the theory pr... More

Great Falls S. U. M. Historic District, Oliver Street, Paterson, Passaic County, NJ

Great Falls S. U. M. Historic District, Oliver Street, Paterson, Passa...

Significance: In 1791 Alexander Hamilton and others founded an industrial venture known as the Society for the Establishment of Useful Manufactures (S.U.M.). The formation of this Society embodied the theory pr... More

Black River Canal, Locks 39-43, State Route 46, Boonville, Oneida County, NY

Black River Canal, Locks 39-43, State Route 46, Boonville, Oneida Coun...

Significance: Locks 39-43 near Boonevill are typical of the 109 locks that comprised the 25 miles of the Black River Canal. A feeder to the Erie Canal, the Black River Canal remained in use until 1923 and outl... More

Champlain Canal, Waterford Locks, U.S. Route 4, Waterford, Saratoga County, NY

Champlain Canal, Waterford Locks, U.S. Route 4, Waterford, Saratoga Co...

Significance: The Champlain Canal was built to link Lake Champlain with the Erie Canal and with the tidewater of the Hudson River. The Canal is presently part of the New York State Barge Canal system, the most... More

Hoover Dam, Spanning Colorado River at Route 93, Boulder City, Clark County, NV

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 County, NV

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

Ames Hydroelectric Plant, Ames, San Miguel County, CO

Ames Hydroelectric Plant, Ames, San Miguel County, CO

Significance: In 1890-91 L.L. Nunn built the world's first single-phase AC power transmission system at Ames in order to power the nearby Gold King Mine's stamp mill. The plant operated under a head of 320 feet... More

Noxontown Mill, Noxontown Road (County Road 38), Middletown, New Castle County, DE

Noxontown Mill, Noxontown Road (County Road 38), Middletown, New Castl...

Significance: Noxontown Mill was typical of the small grain-milling establishments that predominated in Delaware throughout the colonial period. But it was atypical in the sense that it survived so long. In 1... More

Old Croton Aqueduct, Sing Sing Kill Bridge, Spanning Aqueduct Street & Broadway, Ossining, Westchester County, NY

Old Croton Aqueduct, Sing Sing Kill Bridge, Spanning Aqueduct Street &...

Significance: The Old Croton Aqueduct is an outstanding example of 19th century civil engineering and was New York City's first municipal water project. The Sing Sing Kill Bridge, as designed, consists of a lo... More

Old Croton Aqueduct, Sing Sing Kill Bridge, Spanning Aqueduct Street & Broadway, Ossining, Westchester County, NY

Old Croton Aqueduct, Sing Sing Kill Bridge, Spanning Aqueduct Street &...

Significance: The Old Croton Aqueduct is an outstanding example of 19th century civil engineering and was New York City's first municipal water project. The Sing Sing Kill Bridge, as designed, consists of a lo... More

Old Croton Aqueduct, Mill River Waste Weir, U.S. Route 9 at Sleepy Hollow Cemetery, Tarrytown, Westchester County, NY

Old Croton Aqueduct, Mill River Waste Weir, U.S. Route 9 at Sleepy Hol...

Significance: The Old Croton Aqueduct is an outstanding example of 19th century civil engineering and was New York City's first municipal water project. The waste weir formed an integral part of the aqueduct s... More

Tallassee Shoals Hydroelectric Facility, Middle Oconee River, Athens, Clarke County, GA

Tallassee Shoals Hydroelectric Facility, Middle Oconee River, Athens, ...

Picryl description: Public domain image of a hydroelectric dam, industrial facility, power generation, water cascade, free to use, no copyright restrictions.

Western Canal, Tremont Gatehouse, Western & Lawrence Canals, Lowell, Middlesex County, MA

Western Canal, Tremont Gatehouse, Western & Lawrence Canals, Lowell, M...

Public domain scan of an architecture diagram, architectural drawing, building plan, or design, free to use, no copyright restrictions - Picryl description.

Ohio Slack Water Dams, Lock & Dam No. 4, East bank of Ohio River at mile point 18.6, along State Route 65, Ambridge, Beaver County, PA

Ohio Slack Water Dams, Lock & Dam No. 4, East bank of Ohio River at mi...

Significance: Ohio Slack Water Dams, Lock and Dam No. 4, HAER No. PA-227-A was part of the fifty-two slackwater locks and dams constructed by the U.S. Army Corps of Engineers on the Ohio River, between 1877-191... More

Old Croton Aqueduct, Saw Mill River Culvert, Spanning Nepperhan Avenue, Yonkers, Westchester County, NY

Old Croton Aqueduct, Saw Mill River Culvert, Spanning Nepperhan Avenue...

Public domain photograph of street advertisement signs, downtown commercial district, free to use, no copyright restrictions image - Picryl description

Lowell Canal System, Merrimack & Concord Rivers, Lowell, Middlesex County, MA

Lowell Canal System, Merrimack & Concord Rivers, Lowell, Middlesex Cou...

Significance: The City of Lowell is generally considered to be the birthplace of large-scale manufacturing in the U.S. Begun as a transportation canal, the Lowell Canal System evolved, during the 19th century,... More

Old Croton Aqueduct, Quarry Railroad Bridge, Aqueduct Lane at Williams Street, Hastings-on-Hudson, Westchester County, NY

Old Croton Aqueduct, Quarry Railroad Bridge, Aqueduct Lane at Williams...

Significance: The Old Croton Aqueduct is an outstanding example of 19th century civil engineering and was New York City's first municipal water project. The Quarry Railroad Bridge is a representative example o... More

Old Croton Aqueduct, Quarry Railroad Bridge, Aqueduct Lane at Williams Street, Hastings-on-Hudson, Westchester County, NY

Old Croton Aqueduct, Quarry Railroad Bridge, Aqueduct Lane at Williams...

Significance: The Old Croton Aqueduct is an outstanding example of 19th century civil engineering and was New York City's first municipal water project. The Quarry Railroad Bridge is a representative example o... More

Indiana Central Canal, Indianapolis Division, Parallel to West Street, Indianapolis, Marion County, IN

Indiana Central Canal, Indianapolis Division, Parallel to West Street,...

Significance: The Indianapolis Division of the Indiana Central Canal is possibly the oldest remaining man-made structure or facility in Indianapolis-Marion County. The canal is listed on the Indiana State Regi... More

Indiana Central Canal, Indianapolis Division, Parallel to West Street, Indianapolis, Marion County, IN

Indiana Central Canal, Indianapolis Division, Parallel to West Street,...

Significance: The Indianapolis Division of the Indiana Central Canal is possibly the oldest remaining man-made structure or facility in Indianapolis-Marion County. The canal is listed on the Indiana State Regi... More

Lockville Hydroelectric Plant, Deep River, 3.5 miles upstream from Haw River, Moncure, Chatham County, NC

Lockville Hydroelectric Plant, Deep River, 3.5 miles upstream from Haw...

Significance: The Lockville dam, canal, and powerhouse occupy a site which is closely associated with important events in the history of Chatham County and in the overall development of North Carolina. Lord Co... More

Lockville Hydroelectric Plant, Deep River, 3.5 miles upstream from Haw River, Moncure, Chatham County, NC

Lockville Hydroelectric Plant, Deep River, 3.5 miles upstream from Haw...

Significance: The Lockville dam, canal, and powerhouse occupy a site which is closely associated with important events in the history of Chatham County and in the overall development of North Carolina. Lord Co... More

Lockville Hydroelectric Plant, Deep River, 3.5 miles upstream from Haw River, Moncure, Chatham County, NC

Lockville Hydroelectric Plant, Deep River, 3.5 miles upstream from Haw...

Significance: The Lockville dam, canal, and powerhouse occupy a site which is closely associated with important events in the history of Chatham County and in the overall development of North Carolina. Lord Co... More

Ouachita River Lock & Dam No. 8, Ouachita River at River Mile 282.8, Calion, Union County, AR

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, Calion, Union County, AR

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

U.S. Army Garrison Fort Ritchie, Lower Lake Dam, Fort Ritchie Military Reservation, Cascade, Washington County, MD

U.S. Army Garrison Fort Ritchie, Lower Lake Dam, Fort Ritchie Military...

Significance: This dam is the lower unit of a two part-water control system at Fort Ritchie, Maryland. Both dams are locally important structures used to maintain the recreational-use lakes at Fort Ritchie. A... More

Plante Grist Mill, U.S. Route 44, Chepachet, Providence County, RI

Plante Grist Mill, U.S. Route 44, Chepachet, Providence County, RI

Significance: The Plante Grist Mill is a typical example of owner built mill structures that could be found all over New England during the mid-19th century. Unprocessed Field note material exists for this str... More

Plante Grist Mill, U.S. Route 44, Chepachet, Providence County, RI

Plante Grist Mill, U.S. Route 44, Chepachet, Providence County, RI

Significance: The Plante Grist Mill is a typical example of owner built mill structures that could be found all over New England during the mid-19th century. Unprocessed Field note material exists for this str... More

Bureau of Mines Boulder City Experimental Station, Administration Offices & Laboratory Building, Date Street north of U.S. Highway 93, Boulder City, Clark County, NV

Bureau of Mines Boulder City Experimental Station, Administration Offi...

Significance: Building 100, as part of the Date Street Complex, was part of the Bureau of Mines Electrometallurgical Research Facility located in Boulder City. As such, it is within the designated Boulder City... More

Woodville Canal Company, West side of Snake River (River Mile 796), Woodville, Bingham County, ID

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

Fairmount Waterworks, Aquarium Drive, Philadelphia, Philadelphia County, PA

Fairmount Waterworks, Aquarium Drive, Philadelphia, Philadelphia Count...

See also HAER PA-51 for additional documentation. Survey number: HABS PA-1654 Building/structure dates: 1814-1815 Initial Construction Building/structure dates: 1821-1822 Subsequent Work Building/structure d... More

Fairmount Waterworks, Aquarium Drive, Philadelphia, Philadelphia County, PA

Fairmount Waterworks, Aquarium Drive, Philadelphia, Philadelphia Count...

See also HAER PA-51 for additional documentation. Survey number: HABS PA-1654 Building/structure dates: 1814-1815 Initial Construction Building/structure dates: 1821-1822 Subsequent Work Building/structure d... More

Fairmount Waterworks, Aquarium Drive, Philadelphia, Philadelphia County, PA

Fairmount Waterworks, Aquarium Drive, Philadelphia, Philadelphia Count...

See also HAER PA-51 for additional documentation. Survey number: HABS PA-1654 Building/structure dates: 1814-1815 Initial Construction Building/structure dates: 1821-1822 Subsequent Work Building/structure d... More

New York State Barge Canal, Lockport Locks, Richmond Avenue, Lockport, Niagara County, NY

New York State Barge Canal, Lockport Locks, Richmond Avenue, Lockport,...

Locks E34 and E35 were surveyed as part of the 2009 New York State Barge Canal survey; see HAER Nos. NY-515 (Lock E34) and NY-516 (Lock E35). Significance: Locks 67-71 (north flight) comprise a rare 19th-centur... More

New York State Barge Canal, Lockport Locks, Richmond Avenue, Lockport, Niagara County, NY

New York State Barge Canal, Lockport Locks, Richmond Avenue, Lockport,...

Locks E34 and E35 were surveyed as part of the 2009 New York State Barge Canal survey; see HAER Nos. NY-515 (Lock E34) and NY-516 (Lock E35). Significance: Locks 67-71 (north flight) comprise a rare 19th-centur... More

New York State Barge Canal, Lockport Locks, Richmond Avenue, Lockport, Niagara County, NY

New York State Barge Canal, Lockport Locks, Richmond Avenue, Lockport,...

Locks E34 and E35 were surveyed as part of the 2009 New York State Barge Canal survey; see HAER Nos. NY-515 (Lock E34) and NY-516 (Lock E35). Significance: Locks 67-71 (north flight) comprise a rare 19th-centur... More

New York State Barge Canal, Lockport Locks, Richmond Avenue, Lockport, Niagara County, NY

New York State Barge Canal, Lockport Locks, Richmond Avenue, Lockport,...

Locks E34 and E35 were surveyed as part of the 2009 New York State Barge Canal survey; see HAER Nos. NY-515 (Lock E34) and NY-516 (Lock E35). Significance: Locks 67-71 (north flight) comprise a rare 19th-centur... More

Blackstone Canal, Pawtucket, Providence County, RI

Blackstone Canal, Pawtucket, Providence County, RI

Significance: The Blackstone canal was one of the region's first long distance transportation systems. It was one of the waterways that helped to spawn the industrial development that took place in the Blackst... More

Shoshone Hydroelectric Plant Complex, 60111 U.S. Highway 6, Glenwood Springs, Garfield County, CO

Shoshone Hydroelectric Plant Complex, 60111 U.S. Highway 6, Glenwood S...

Significance: The Shoshone complex is significant for being one of the earliest hydroelectric plants on the Colorado River and one of the largest in the Rocky Mountain Region to depend upon the flow of a river ... More

Shoshone Hydroelectric Plant Complex, 60111 U.S. Highway 6, Glenwood Springs, Garfield County, CO

Shoshone Hydroelectric Plant Complex, 60111 U.S. Highway 6, Glenwood S...

Significance: The Shoshone complex is significant for being one of the earliest hydroelectric plants on the Colorado River and one of the largest in the Rocky Mountain Region to depend upon the flow of a river ... More

Shoshone Hydroelectric Plant Complex, 60111 U.S. Highway 6, Glenwood Springs, Garfield County, CO

Shoshone Hydroelectric Plant Complex, 60111 U.S. Highway 6, Glenwood S...

Significance: The Shoshone complex is significant for being one of the earliest hydroelectric plants on the Colorado River and one of the largest in the Rocky Mountain Region to depend upon the flow of a river ... More

Pawtucket Canal, Lower Locks, Lowell, Middlesex County, MA

Pawtucket Canal, Lower Locks, Lowell, Middlesex County, MA

Significance: The Lower Locks are comprised of two navigation locks and a dam, with a head of 17 feet. They were some of the earliest locks in the Lowell Canal System, originally constructed in the first phase... More

Pawtucket Canal, Lower Locks, Lowell, Middlesex County, MA

Pawtucket Canal, Lower Locks, Lowell, Middlesex County, MA

Significance: The Lower Locks are comprised of two navigation locks and a dam, with a head of 17 feet. They were some of the earliest locks in the Lowell Canal System, originally constructed in the first phase... More

Snake River Valley Irrigation District, East Side of Snake River (River Mile 796), Shelley, Bingham County, ID

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

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 6, Trempealeau, Trempealeau County, WI

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, Trempealeau County, WI

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, Trempealeau County, WI

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, Trempealeau County, WI

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, Trempealeau County, WI

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, Trempealeau County, WI

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

Bald Eagle Cross-Cut Canal Lock, North of Water Street along West Branch of Susquehanna River South bank, 500 feet East of Jay Street Bridge, Lock Haven, Clinton County, PA

Bald Eagle Cross-Cut Canal Lock, North of Water Street along West Bran...

Significance: Lock No. 35 is a historically significant remnant of the Pennsylvania state-built canal system. The lock is the sole surviving structure of the Bald Eagle Cross-Cut Canal, a lateral line construc... More

Bald Eagle Cross-Cut Canal Lock, North of Water Street along West Branch of Susquehanna River South bank, 500 feet East of Jay Street Bridge, Lock Haven, Clinton County, PA

Bald Eagle Cross-Cut Canal Lock, North of Water Street along West Bran...

Significance: Lock No. 35 is a historically significant remnant of the Pennsylvania state-built canal system. The lock is the sole surviving structure of the Bald Eagle Cross-Cut Canal, a lateral line construc... More

Old Croton Aqueduct, Ventilator Number 9, Spring & Everett Streets, Ossining, Westchester County, NY

Old Croton Aqueduct, Ventilator Number 9, Spring & Everett Streets, Os...

Significance: The Old Croton Aqueduct is an outstanding example of 19th century civil engineering and was New York City's first municipal water project. Ventilators played an important role in the function of ... More

Waterways Experiment Station, Hydraulics Laboratory, Halls Ferry Road, 2 miles south of I-20, Vicksburg, Warren County, MS

Waterways Experiment Station, Hydraulics Laboratory, Halls Ferry Road,...

Significance: Established in response to a campaign to create a national hydraulics laboratory during the 1920s, the Waterways Experiment Station's activities include the resolution of hydraulic problems in wat... More

Waterways Experiment Station, Hydraulics Laboratory, Halls Ferry Road, 2 miles south of I-20, Vicksburg, Warren County, MS

Waterways Experiment Station, Hydraulics Laboratory, Halls Ferry Road,...

Significance: Established in response to a campaign to create a national hydraulics laboratory during the 1920s, the Waterways Experiment Station's activities include the resolution of hydraulic problems in wat... More

72 Marlborough Street, Residential Hydraulic Elevator, Boston, Suffolk County, MA

72 Marlborough Street, Residential Hydraulic Elevator, Boston, Suffolk...

Significance: The elevator was representative of an important mechanical development in vertical transportation. According to the Smithsonian, "The rope-geared hydraulic elevator was introduced to the United S... More

72 Marlborough Street, Residential Hydraulic Elevator, Boston, Suffolk County, MA

72 Marlborough Street, Residential Hydraulic Elevator, Boston, Suffolk...

Significance: The elevator was representative of an important mechanical development in vertical transportation. According to the Smithsonian, "The rope-geared hydraulic elevator was introduced to the United S... More

72 Marlborough Street, Residential Hydraulic Elevator, Boston, Suffolk County, MA

72 Marlborough Street, Residential Hydraulic Elevator, Boston, Suffolk...

Significance: The elevator was representative of an important mechanical development in vertical transportation. According to the Smithsonian, "The rope-geared hydraulic elevator was introduced to the United S... More

72 Marlborough Street, Residential Hydraulic Elevator, Boston, Suffolk County, MA

72 Marlborough Street, Residential Hydraulic Elevator, Boston, Suffolk...

Significance: The elevator was representative of an important mechanical development in vertical transportation. According to the Smithsonian, "The rope-geared hydraulic elevator was introduced to the United S... More

72 Marlborough Street, Residential Hydraulic Elevator, Boston, Suffolk County, MA

72 Marlborough Street, Residential Hydraulic Elevator, Boston, Suffolk...

Significance: The elevator was representative of an important mechanical development in vertical transportation. According to the Smithsonian, "The rope-geared hydraulic elevator was introduced to the United S... More

Hacienda Buena Vista, PR Route 10 (Ponce to Arecibo), Magueyes, Ponce Municipio, PR

Hacienda Buena Vista, PR Route 10 (Ponce to Arecibo), Magueyes, Ponce ...

Public domain photo of a monument, historic place, free to use, no copyright restrictions image - Picryl description

Hacienda Buena Vista, PR Route 10 (Ponce to Arecibo), Magueyes, Ponce Municipio, PR

Hacienda Buena Vista, PR Route 10 (Ponce to Arecibo), Magueyes, Ponce ...

Public domain photograph of industrial architecture, factory building, free to use, no copyright restrictions image - Picryl description

Hacienda Buena Vista, PR Route 10 (Ponce to Arecibo), Magueyes, Ponce Municipio, PR

Hacienda Buena Vista, PR Route 10 (Ponce to Arecibo), Magueyes, Ponce ...

Public domain photograph of industrial architecture, factory building, free to use, no copyright restrictions image - Picryl description

Hacienda Buena Vista, PR Route 10 (Ponce to Arecibo), Magueyes, Ponce Municipio, PR

Hacienda Buena Vista, PR Route 10 (Ponce to Arecibo), Magueyes, Ponce ...

Public domain photograph of industrial architecture, factory building, free to use, no copyright restrictions image - Picryl description

Bureau of Mines Metallurgical Research Laboratory, Original Building, Date Street north of U.S. Highway 93, Boulder City, Clark County, NV

Bureau of Mines Metallurgical Research Laboratory, Original Building, ...

Significance: Building 200, as part of the Date Street Complex, was part of the Bureau of Mines Electrometallurgical Research Facility located in Boulder City. As such, it is within the designated Boulder City... More

Bureau of Mines Metallurgical Research Laboratory, Original Building, Date Street north of U.S. Highway 93, Boulder City, Clark County, NV

Bureau of Mines Metallurgical Research Laboratory, Original Building, ...

Significance: Building 200, as part of the Date Street Complex, was part of the Bureau of Mines Electrometallurgical Research Facility located in Boulder City. As such, it is within the designated Boulder City... More

Bureau of Mines Metallurgical Research Laboratory, Original Building, Date Street north of U.S. Highway 93, Boulder City, Clark County, NV

Bureau of Mines Metallurgical Research Laboratory, Original Building, ...

Significance: Building 200, as part of the Date Street Complex, was part of the Bureau of Mines Electrometallurgical Research Facility located in Boulder City. As such, it is within the designated Boulder City... More

Augusta Canal, Augusta, Richmond County, GA

Augusta Canal, Augusta, Richmond County, GA

Significance: The Augusta power and navigation canal was projected in order to make Augusta a manufacturing center. By the 1880's, the canal was a success. It supplied water power for eight textile mills, thr... More

Augusta Canal, Augusta, Richmond County, GA

Augusta Canal, Augusta, Richmond County, GA

Significance: The Augusta power and navigation canal was projected in order to make Augusta a manufacturing center. By the 1880's, the canal was a success. It supplied water power for eight textile mills, thr... More

Augusta Canal, Augusta, Richmond County, GA

Augusta Canal, Augusta, Richmond County, GA

Significance: The Augusta power and navigation canal was projected in order to make Augusta a manufacturing center. By the 1880's, the canal was a success. It supplied water power for eight textile mills, thr... More

Augusta Canal, Augusta, Richmond County, GA

Augusta Canal, Augusta, Richmond County, GA

Significance: The Augusta power and navigation canal was projected in order to make Augusta a manufacturing center. By the 1880's, the canal was a success. It supplied water power for eight textile mills, thr... More

Augusta Canal, Augusta, Richmond County, GA

Augusta Canal, Augusta, Richmond County, GA

Significance: The Augusta power and navigation canal was projected in order to make Augusta a manufacturing center. By the 1880's, the canal was a success. It supplied water power for eight textile mills, thr... More

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