Bidwell Bar Suspension Bridge & Stone Toll House, Near Lake Oroville (...
Significance: This structure is the only surviving suspension bridge in the American West dating to the mid 19th century. When reconstructed over Lake Oroville, it was "strengthened" with pile supports under t... More
Bidwell Bar Suspension Bridge & Stone Toll House, Near Lake Oroville (...
Significance: This structure is the only surviving suspension bridge in the American West dating to the mid 19th century. When reconstructed over Lake Oroville, it was "strengthened" with pile supports under t... More
Pearl Street Bridge, Spanning Grand River at Pearl Street, Grand Rapid...
Significance: The bridge is a good example of open spandrel type arch construction, as described in engineering textbooks published during the first quarter of the twentieth century. This type of bridge constr... More
Twin Falls-Jerome Bridge, U.S. Highway 93 Spanning Snake River, Twin F...
Significance: The bridge was built by The Union Bridge Company of Portland, Oregon. It is a cantilever deck truss that rises 550 feet above the height of the River. At the time of construction it was reported... More
Snowden Bridge, Spanning Missouri River, Nohly, Richland County, MT
Survey number: HAER MT-27 Building/structure dates: 1913 Initial Construction Building/structure dates: 1925 Subsequent Work
Snowden Bridge, Spanning Missouri River, Nohly, Richland County, MT
Survey number: HAER MT-27 Building/structure dates: 1913 Initial Construction Building/structure dates: 1925 Subsequent Work
New York, New Haven & Hartford Railroad, Fort Point Channel Rolling Li...
Significance: The construction of South Station in 1896-98, involved the rerouting of several of the old lines from the west and south. The New York, New Haven & Hartford Railroad constructed a six-track rollin... More
New York, New Haven & Hartford Railroad, Fort Point Channel Rolling Li...
Significance: The construction of South Station in 1896-98, involved the rerouting of several of the old lines from the west and south. The New York, New Haven & Hartford Railroad constructed a six-track rollin... More
New York, New Haven & Hartford Railroad, Fort Point Channel Rolling Li...
Significance: The construction of South Station in 1896-98, involved the rerouting of several of the old lines from the west and south. The New York, New Haven & Hartford Railroad constructed a six-track rollin... More
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
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
Bridgeport Covered Bridge, Spanning South Fork of Yuba River at bypass...
Howe truss with arch See also HABS No. CA-1401 for additional documentation, including one photograph. Significance: The Bridgeport Covered Bridge is 233 feet long and was originally built as part of a toll roa... More
Willamette Falls Lock Chamber No.1, Willamette River, West Linn, Clack...
Picryl description: Public domain image of a canal, barge, historic place, water reflection, 19th century, free to use, no copyright restrictions.
Allegheny Lift Lock No. 4 & Weigh Lock, North shore of Allegheny River...
Significance: The Allegheny Locks were among the few canal-related structures surviving in Pittsburgh. The locks are near the western terminus of the Pennsylvania Canal which has been determined to be of natio... More
Allegheny Lift Lock No. 4 & Weigh Lock, North shore of Allegheny River...
Significance: The Allegheny Locks were among the few canal-related structures surviving in Pittsburgh. The locks are near the western terminus of the Pennsylvania Canal which has been determined to be of natio... More
Allegheny Lift Lock No. 4 & Weigh Lock, North shore of Allegheny River...
Significance: The Allegheny Locks were among the few canal-related structures surviving in Pittsburgh. The locks are near the western terminus of the Pennsylvania Canal which has been determined to be of natio... More
Armour, Swift, Burlington Bridge, Kansas City, Jackson County, MO
Picryl description: Public domain image of an industrial equipment, workshop, assembly line, factory, power engine, 19th-20th century, free to use, no copyright restrictions.
Armour, Swift, Burlington Bridge, Kansas City, Jackson County, MO
Public domain scan of the book page, free to use, no copyright restrictions image - Picryl description
Armour, Swift, Burlington Bridge, Kansas City, Jackson County, MO
Public domain scan of the book page, free to use, no copyright restrictions image - Picryl description
Blue Water Bridge Plaza, 410 Elmwood Street, Port Huron, St. Clair Cou...
Significance: The bridge and plaza were completed in 1938. They are reflections of Depression-era engineering and architecture. The plaza was designed and built by George L. Harvey and Norman B. Forbes. The ... More
Blue Water Bridge Plaza, 410 Elmwood Street, Port Huron, St. Clair Cou...
Significance: The bridge and plaza were completed in 1938. They are reflections of Depression-era engineering and architecture. The plaza was designed and built by George L. Harvey and Norman B. Forbes. The ... More
Blue Water Bridge Plaza, 410 Elmwood Street, Port Huron, St. Clair Cou...
Significance: The bridge and plaza were completed in 1938. They are reflections of Depression-era engineering and architecture. The plaza was designed and built by George L. Harvey and Norman B. Forbes. The ... More
Annisquam Bridge, Spanning Lobster Cove between Washington & River Str...
Significance: The Annisquam Bridge is a wood-pile and timber-stringer highway bridge, 443 feet in length and 26 feet in width. Although it was the most common type of bridge over wide bodies of water throughou... More
Pawtucket Canal, Guard Locks, Lowell, Middlesex County, MA
Significance: The Guard Locks were the first set of locks constructed in the Lowell System which are still in existence. They have, however, been altered and added to since first put into use. The Guard Locks... More
Pawtucket Canal, Guard Locks, Lowell, Middlesex County, MA
Significance: The Guard Locks were the first set of locks constructed in the Lowell System which are still in existence. They have, however, been altered and added to since first put into use. The Guard Locks... More
Pawtucket Canal, Guard Locks, Lowell, Middlesex County, MA
Significance: The Guard Locks were the first set of locks constructed in the Lowell System which are still in existence. They have, however, been altered and added to since first put into use. The Guard Locks... More
Pawtucket Canal, Guard Locks, Lowell, Middlesex County, MA
Significance: The Guard Locks were the first set of locks constructed in the Lowell System which are still in existence. They have, however, been altered and added to since first put into use. The Guard Locks... More
Pawtucket Canal, Swamp Locks, Pawtucket & Merrimack Canals, Lowell, Mi...
Significance: The Swamp Locks complex consists of a flight of two navigation locks with a dam at the west end of the upper lock. The original locks opened in 1797, and were rebuilt in 1822-1823 when this confi... More
Pawtucket Canal, Swamp Locks, Pawtucket & Merrimack Canals, Lowell, Mi...
Significance: The Swamp Locks complex consists of a flight of two navigation locks with a dam at the west end of the upper lock. The original locks opened in 1797, and were rebuilt in 1822-1823 when this confi... More
Pawtucket Canal, Swamp Locks, Pawtucket & Merrimack Canals, Lowell, Mi...
Significance: The Swamp Locks complex consists of a flight of two navigation locks with a dam at the west end of the upper lock. The original locks opened in 1797, and were rebuilt in 1822-1823 when this confi... More
Pennsylvania Turnpike, Everett Headquarters, North side of State Route...
Significance: Everett was selected as a headquarters for maintenance, engineering, and fare collection for the Pennsylvania Turnpike because of its central location on the original turnpike between Irwin and Ca... More
Bidwell Bar Suspension Bridge & Stone Toll House, Near Lake Oroville (...
Significance: This structure is the only surviving suspension bridge in the American West dating to the mid 19th century. When reconstructed over Lake Oroville, it was "strengthened" with pile supports under t... More
Dolph Toll Road, State Highway 22 vicinity, Sinslaw National Forest, H...
Public domain photograph - historical image of Oregon, United States, free to use, no copyright restrictions image - Picryl description
Dolph Toll Road, State Highway 22 vicinity, Sinslaw National Forest, H...
Public domain photograph - historical image of Oregon, United States, free to use, no copyright restrictions image - Picryl description
Dolph Toll Road, State Highway 22 vicinity, Sinslaw National Forest, H...
Public domain photograph - historical image of Oregon, United States, free to use, no copyright restrictions image - Picryl description
Twin Falls-Jerome Bridge, U.S. Highway 93 Spanning Snake River, Twin F...
Significance: The bridge was built by The Union Bridge Company of Portland, Oregon. It is a cantilever deck truss that rises 550 feet above the height of the River. At the time of construction it was reported... More
Snowden Bridge, Spanning Missouri River, Nohly, Richland County, MT
Survey number: HAER MT-27 Building/structure dates: 1913 Initial Construction Building/structure dates: 1925 Subsequent Work
New York, New Haven & Hartford Railroad, Fort Point Channel Rolling Li...
Significance: The construction of South Station in 1896-98, involved the rerouting of several of the old lines from the west and south. The New York, New Haven & Hartford Railroad constructed a six-track rollin... More
New York, New Haven & Hartford Railroad, Fort Point Channel Rolling Li...
Significance: The construction of South Station in 1896-98, involved the rerouting of several of the old lines from the west and south. The New York, New Haven & Hartford Railroad constructed a six-track rollin... More
New York, New Haven & Hartford Railroad, Fort Point Channel Rolling Li...
Significance: The construction of South Station in 1896-98, involved the rerouting of several of the old lines from the west and south. The New York, New Haven & Hartford Railroad constructed a six-track rollin... More
New York, New Haven & Hartford Railroad, Fort Point Channel Rolling Li...
Significance: The construction of South Station in 1896-98, involved the rerouting of several of the old lines from the west and south. The New York, New Haven & Hartford Railroad constructed a six-track rollin... More
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
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
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
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
Colusa Bridge, Spanning Sacramento River, Colusa, Colusa County, CA
Significance: The turning mechanism, although presently electrically operated, was originally hand-operated, is representative of several swing span bridges throughout California. Survey number: HAER CA-7 Bui... More
Red River Bridge, Spanning Red River at U.S. Highway 82, Garland, Mill...
Significance: Four known examples of the Pennsylvania truss remain in Arkansas. The main span length of the Red River Bridge is double and its overall bridge length is triple that of the other three in the sta... More
West Branch Pennsylvania Canal, Lock No. 34 Lock Keeper's House, South...
Significance: The lock keeper's house at Lock No. 34 (see HAER No. PA-188-A) is a historically significant remnant of the Pennsylvania state-built canal system. Part of the West Branch Pennsylvania Canal (see ... More
Willamette Falls Lock Chamber No.1, Willamette River, West Linn, Clack...
Picryl description: Public domain image of an industrial equipment, workshop, assembly line, factory, power engine, 19th-20th century, free to use, no copyright restrictions.
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
Niantic River Swing Bridge, Spanning Niantic River between East Lyme &...
Significance: The Niantic River Bridge has two spans: a fixed Pratt through truss and the swing span which resembles a Warren through truss with verticals. All members and all connections are riveted. Survey ... More
Niantic River Swing Bridge, Spanning Niantic River between East Lyme &...
Significance: The Niantic River Bridge has two spans: a fixed Pratt through truss and the swing span which resembles a Warren through truss with verticals. All members and all connections are riveted. Survey ... More
Niantic River Swing Bridge, Spanning Niantic River between East Lyme &...
Significance: The Niantic River Bridge has two spans: a fixed Pratt through truss and the swing span which resembles a Warren through truss with verticals. All members and all connections are riveted. Survey ... More
Armour, Swift, Burlington Bridge, Kansas City, Jackson County, MO
Picryl description: Public domain image of a bridge, water, historic structure, free to use, no copyright restrictions.
Armour, Swift, Burlington Bridge, Kansas City, Jackson County, MO
Picryl description: Public domain image of a bridge, railroad structure, train viaduct, free to use, no copyright restrictions.
Armour, Swift, Burlington Bridge, Kansas City, Jackson County, MO
Picryl description: Public domain vintage artistic photograph, free to use, no copyright restrictions image.
Armour, Swift, Burlington Bridge, Kansas City, Jackson County, MO
Picryl description: Public domain image of a tower, column, chimney, free to use, no copyright restrictions.
Armour, Swift, Burlington Bridge, Kansas City, Jackson County, MO
Public domain scan of the book page, free to use, no copyright restrictions image - Picryl description
Armour, Swift, Burlington Bridge, Kansas City, Jackson County, MO
Public domain image of a train station in Boston, Massachusetts, free to use, no copyright restrictions - Picryl description
Armour, Swift, Burlington Bridge, Kansas City, Jackson County, MO
Public domain photograph - historical image of Missouri, United States, free to use, no copyright restrictions image - Picryl description
Blue Water Bridge Plaza, 410 Elmwood Street, Port Huron, St. Clair Cou...
Significance: The bridge and plaza were completed in 1938. They are reflections of Depression-era engineering and architecture. The plaza was designed and built by George L. Harvey and Norman B. Forbes. The ... More
Annisquam Bridge, Spanning Lobster Cove between Washington & River Str...
Significance: The Annisquam Bridge is a wood-pile and timber-stringer highway bridge, 443 feet in length and 26 feet in width. Although it was the most common type of bridge over wide bodies of water throughou... More
Annisquam Bridge, Spanning Lobster Cove between Washington & River Str...
Significance: The Annisquam Bridge is a wood-pile and timber-stringer highway bridge, 443 feet in length and 26 feet in width. Although it was the most common type of bridge over wide bodies of water throughou... More
Pawtucket Canal, Guard Locks, Lowell, Middlesex County, MA
Significance: The Guard Locks were the first set of locks constructed in the Lowell System which are still in existence. They have, however, been altered and added to since first put into use. The Guard Locks... More
Pawtucket Canal, Guard Locks, Lowell, Middlesex County, MA
Significance: The Guard Locks were the first set of locks constructed in the Lowell System which are still in existence. They have, however, been altered and added to since first put into use. The Guard Locks... More
Pawtucket Canal, Guard Locks, Lowell, Middlesex County, MA
Significance: The Guard Locks were the first set of locks constructed in the Lowell System which are still in existence. They have, however, been altered and added to since first put into use. The Guard Locks... More
Pawtucket Canal, Swamp Locks, Pawtucket & Merrimack Canals, Lowell, Mi...
Significance: The Swamp Locks complex consists of a flight of two navigation locks with a dam at the west end of the upper lock. The original locks opened in 1797, and were rebuilt in 1822-1823 when this confi... More
Bidwell Bar Suspension Bridge & Stone Toll House, Near Lake Oroville (...
Significance: This structure is the only surviving suspension bridge in the American West dating to the mid 19th century. When reconstructed over Lake Oroville, it was "strengthened" with pile supports under t... More
Bidwell Bar Suspension Bridge & Stone Toll House, Near Lake Oroville (...
Significance: This structure is the only surviving suspension bridge in the American West dating to the mid 19th century. When reconstructed over Lake Oroville, it was "strengthened" with pile supports under t... More
Blackstone Canal, Charles & Randall Streets, Canal & Haymarket Streets...
Public domain photograph - historical image of Rhode Island, United States, free to use, no copyright restrictions image - Picryl description
Market Street Bridge, Spanning East channel of Susquehanna River at Ma...
Significance: The river crossing where the bridge now stands had historically been the western gateway into Harrisburg. For over a century, spans here were operated by the Harrisburg Bridge Company, including t... More
Market Street Bridge, Spanning East channel of Susquehanna River at Ma...
Significance: The river crossing where the bridge now stands had historically been the western gateway into Harrisburg. For over a century, spans here were operated by the Harrisburg Bridge Company, including t... More
Dolph Toll Road, State Highway 22 vicinity, Sinslaw National Forest, H...
Public domain photograph - historical image of Oregon, United States, free to use, no copyright restrictions image - Picryl description
Dolph Toll Road, State Highway 22 vicinity, Sinslaw National Forest, H...
Public domain photograph - historical image of Oregon, United States, free to use, no copyright restrictions image - Picryl description
Twin Falls-Jerome Bridge, U.S. Highway 93 Spanning Snake River, Twin F...
Significance: The bridge was built by The Union Bridge Company of Portland, Oregon. It is a cantilever deck truss that rises 550 feet above the height of the River. At the time of construction it was reported... More
Twin Falls-Jerome Bridge, U.S. Highway 93 Spanning Snake River, Twin F...
Significance: The bridge was built by The Union Bridge Company of Portland, Oregon. It is a cantilever deck truss that rises 550 feet above the height of the River. At the time of construction it was reported... More
Twin Falls-Jerome Bridge, U.S. Highway 93 Spanning Snake River, Twin F...
Significance: The bridge was built by The Union Bridge Company of Portland, Oregon. It is a cantilever deck truss that rises 550 feet above the height of the River. At the time of construction it was reported... More
Snowden Bridge, Spanning Missouri River, Nohly, Richland County, MT
Survey number: HAER MT-27 Building/structure dates: 1913 Initial Construction Building/structure dates: 1925 Subsequent Work
Snowden Bridge, Spanning Missouri River, Nohly, Richland County, MT
Survey number: HAER MT-27 Building/structure dates: 1913 Initial Construction Building/structure dates: 1925 Subsequent Work
New York, New Haven & Hartford Railroad, Fort Point Channel Rolling Li...
Significance: The construction of South Station in 1896-98, involved the rerouting of several of the old lines from the west and south. The New York, New Haven & Hartford Railroad constructed a six-track rollin... More
New York, New Haven & Hartford Railroad, Fort Point Channel Rolling Li...
Significance: The construction of South Station in 1896-98, involved the rerouting of several of the old lines from the west and south. The New York, New Haven & Hartford Railroad constructed a six-track rollin... More
New York, New Haven & Hartford Railroad, Fort Point Channel Rolling Li...
Significance: The construction of South Station in 1896-98, involved the rerouting of several of the old lines from the west and south. The New York, New Haven & Hartford Railroad constructed a six-track rollin... More
New York, New Haven & Hartford Railroad, Fort Point Channel Rolling Li...
Significance: The construction of South Station in 1896-98, involved the rerouting of several of the old lines from the west and south. The New York, New Haven & Hartford Railroad constructed a six-track rollin... More
New York, New Haven & Hartford Railroad, Fort Point Channel Rolling Li...
Significance: The construction of South Station in 1896-98, involved the rerouting of several of the old lines from the west and south. The New York, New Haven & Hartford Railroad constructed a six-track rollin... More
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
Colusa Bridge, Spanning Sacramento River, Colusa, Colusa County, CA
Significance: The turning mechanism, although presently electrically operated, was originally hand-operated, is representative of several swing span bridges throughout California. Survey number: HAER CA-7 Bui... More
Bridgeport Covered Bridge, Spanning South Fork of Yuba River at bypass...
Howe truss with arch See also HABS No. CA-1401 for additional documentation, including one photograph. Significance: The Bridgeport Covered Bridge is 233 feet long and was originally built as part of a toll roa... More
Bridgeport Covered Bridge, Spanning South Fork of Yuba River at bypass...
Howe truss with arch See also HABS No. CA-1401 for additional documentation, including one photograph. Significance: The Bridgeport Covered Bridge is 233 feet long and was originally built as part of a toll roa... More
Bridgeport Covered Bridge, Spanning South Fork of Yuba River at bypass...
Howe truss with arch See also HABS No. CA-1401 for additional documentation, including one photograph. Significance: The Bridgeport Covered Bridge is 233 feet long and was originally built as part of a toll roa... More
Red River Bridge, Spanning Red River at U.S. Highway 82, Garland, Mill...
Significance: Four known examples of the Pennsylvania truss remain in Arkansas. The main span length of the Red River Bridge is double and its overall bridge length is triple that of the other three in the sta... More
Red River Bridge, Spanning Red River at U.S. Highway 82, Garland, Mill...
Significance: Four known examples of the Pennsylvania truss remain in Arkansas. The main span length of the Red River Bridge is double and its overall bridge length is triple that of the other three in the sta... More
Willamette Falls Lock Chamber No.1, Willamette River, West Linn, Clack...
Picryl description: Public domain image of a canal, barge, historic place, water reflection, 19th century, free to use, no copyright restrictions.
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
Niantic River Swing Bridge, Spanning Niantic River between East Lyme &...
Significance: The Niantic River Bridge has two spans: a fixed Pratt through truss and the swing span which resembles a Warren through truss with verticals. All members and all connections are riveted. Survey ... More
Allegheny Lift Lock No. 4 & Weigh Lock, North shore of Allegheny River...
Significance: The Allegheny Locks were among the few canal-related structures surviving in Pittsburgh. The locks are near the western terminus of the Pennsylvania Canal which has been determined to be of natio... More
Allegheny Lift Lock No. 4 & Weigh Lock, North shore of Allegheny River...
Significance: The Allegheny Locks were among the few canal-related structures surviving in Pittsburgh. The locks are near the western terminus of the Pennsylvania Canal which has been determined to be of natio... More
Allegheny Lift Lock No. 4 & Weigh Lock, North shore of Allegheny River...
Significance: The Allegheny Locks were among the few canal-related structures surviving in Pittsburgh. The locks are near the western terminus of the Pennsylvania Canal which has been determined to be of natio... More
Allegheny Lift Lock No. 4 & Weigh Lock, North shore of Allegheny River...
Significance: The Allegheny Locks were among the few canal-related structures surviving in Pittsburgh. The locks are near the western terminus of the Pennsylvania Canal which has been determined to be of natio... More
Allegheny Lift Lock No. 4 & Weigh Lock, North shore of Allegheny River...
Significance: The Allegheny Locks were among the few canal-related structures surviving in Pittsburgh. The locks are near the western terminus of the Pennsylvania Canal which has been determined to be of natio... More
Blue Water Bridge Plaza, 410 Elmwood Street, Port Huron, St. Clair Cou...
Significance: The bridge and plaza were completed in 1938. They are reflections of Depression-era engineering and architecture. The plaza was designed and built by George L. Harvey and Norman B. Forbes. The ... More