Congress Street Bascule Bridge, Spanning Fort Point Channel at Congres...
Significance: The Congress Street Bridge, built in 1930, is a trunnion bascule bridge and the most recent of the five movable-truss bridges spanning the Fort Point Channel. It replaced a steam operated swing d... More
Congress Street Bascule Bridge, Spanning Fort Point Channel at Congres...
Significance: The Congress Street Bridge, built in 1930, is a trunnion bascule bridge and the most recent of the five movable-truss bridges spanning the Fort Point Channel. It replaced a steam operated swing d... More
Chicago, Milwaukee, St. Paul & Pacific Railroad Roundhouse, Kentucky A...
Significance: The roundhouse at Deer Lodge is part of one of the largest and earliest electrification projects in the U.S. as well as being the largest wooden structure of its type remaining in the U.S. Survey... More
Chicago, Milwaukee, St. Paul & Pacific Railroad Roundhouse, Kentucky A...
Significance: The roundhouse at Deer Lodge is part of one of the largest and earliest electrification projects in the U.S. as well as being the largest wooden structure of its type remaining in the U.S. Survey... 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
North Central Railroad, Baltimore Freight House, Guilford & Centre Str...
Significance: The Baltimore Freight Shed, built by the Northern Central Railroad, is a rare example of composite timber and iron roof construction of the mid 19th century. The roof structure is comprised of a ... More
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,...
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,...
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,...
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,...
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,...
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
Summer Street Retractile Bridge, Spanning Fort Point Channel at Summer...
Significance: The Summer St. bridge is a rare movable type of bridge known as a retractile draw, in which the moving span is pulled diagonally away from the navigable channel on several sets of rails. Only fou... More
Summer Street Retractile Bridge, Spanning Fort Point Channel at Summer...
Significance: The Summer St. bridge is a rare movable type of bridge known as a retractile draw, in which the moving span is pulled diagonally away from the navigable channel on several sets of rails. Only fou... More
Bridges of the Upper Tombigbee River Valley, Cochrane, Pickens County,...
Survey number: HAER AL-7 Public domain photograph - historical image of Alabama, United States, free to use, no copyright restrictions image - Picryl description
City Pier A, Battery Place at Hudson River, New York, New York County,...
Significance: City Pier A is the oldest functioning pier in New York City. The pier and foundations represent a good example of the use of concrete in maritime projects in the late 19th century. The clock tow... More
Frankford Arsenal, South of Tacony Street between Bridge Street & trac...
Significance: Starting in 1816 as a storage facility, Frankford Arsenal grew into the United States' most well known ordnance manufacturers, specializing in small arms munitions. The arsenal was closed down in... More
Northern Avenue Swing Bridge, Spanning Fort Point Channel at boundary ...
Significance: The Northern Avenue Swing Bridge, built in 1908, is one of only three surviving swing bridges built by the city of Boston in the late 19th and early 20th century. Today, still operated infrequent... More
Northern Avenue Swing Bridge, Spanning Fort Point Channel at boundary ...
Significance: The Northern Avenue Swing Bridge, built in 1908, is one of only three surviving swing bridges built by the city of Boston in the late 19th and early 20th century. Today, still operated infrequent... More
Northern Avenue Swing Bridge, Spanning Fort Point Channel at boundary ...
Significance: The Northern Avenue Swing Bridge, built in 1908, is one of only three surviving swing bridges built by the city of Boston in the late 19th and early 20th century. Today, still operated infrequent... More
Northern Avenue Swing Bridge, Spanning Fort Point Channel at boundary ...
Significance: The Northern Avenue Swing Bridge, built in 1908, is one of only three surviving swing bridges built by the city of Boston in the late 19th and early 20th century. Today, still operated infrequent... More
Bridgeport Swing Span Bridge, Spanning Tennessee River, Bridgeport, Ja...
Significance: The Bridgeport Swing Span Railroad Bridge embodies the distinctive characteristics of a type, period and method of construction. Its method of construction (pin-connected) is rare for a swing bri... More
North Platte River Bowstring Truss Bridge, Spanning North Platte River...
STORED OFF SITE AND ON SITE. mchr Significance: The North Platte River Bowstring Truss Bridge is the first of its kind to be built in the then territory of Wyoming. It is also believed to be the first military... More
Mobile Launcher One, Kennedy Space Center, Titusville, Brevard County,...
Structure associated with Apollo 4, Apollo 8, Apollo 11, Skylab & Apollo-Soyuz Test Project. Significance: The mobile launcher is a representative example of the engineering and technology used in the U.S. mann... More
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
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
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
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
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
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
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
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
Congress Street Bascule Bridge, Spanning Fort Point Channel at Congres...
Significance: The Congress Street Bridge, built in 1930, is a trunnion bascule bridge and the most recent of the five movable-truss bridges spanning the Fort Point Channel. It replaced a steam operated swing d... 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
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
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
North Central Railroad, Baltimore Freight House, Guilford & Centre Str...
Significance: The Baltimore Freight Shed, built by the Northern Central Railroad, is a rare example of composite timber and iron roof construction of the mid 19th century. The roof structure is comprised of a ... More
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,...
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,...
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,...
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
Conrad's Warehouse, Between Locks 38 & 39 on Union Canal, Bernville, B...
Significance: This modest building is a rare survival of the canal era. It reflects the economic impact of the Union Canal. Unprocessed Field note material exists for this structure: FN-5 Survey number: HAER... More
Conrad's Warehouse, Between Locks 38 & 39 on Union Canal, Bernville, B...
Significance: This modest building is a rare survival of the canal era. It reflects the economic impact of the Union Canal. Unprocessed Field note material exists for this structure: FN-5 Survey number: HAER... More
Philadelphia, Wilmington & Baltimore Railroad, President Street Statio...
Significance: As of 1974, the President St. Station was one of the oldest large city railroad terminals still standing in the United States. The station quite possibly contains one of the earliest uses of the ... More
Summer Street Retractile Bridge, Spanning Fort Point Channel at Summer...
Significance: The Summer St. bridge is a rare movable type of bridge known as a retractile draw, in which the moving span is pulled diagonally away from the navigable channel on several sets of rails. Only fou... More
Summer Street Retractile Bridge, Spanning Fort Point Channel at Summer...
Significance: The Summer St. bridge is a rare movable type of bridge known as a retractile draw, in which the moving span is pulled diagonally away from the navigable channel on several sets of rails. Only fou... More
Northern Avenue Swing Bridge, Spanning Fort Point Channel at boundary ...
Significance: The Northern Avenue Swing Bridge, built in 1908, is one of only three surviving swing bridges built by the city of Boston in the late 19th and early 20th century. Today, still operated infrequent... More
Northern Avenue Swing Bridge, Spanning Fort Point Channel at boundary ...
Significance: The Northern Avenue Swing Bridge, built in 1908, is one of only three surviving swing bridges built by the city of Boston in the late 19th and early 20th century. Today, still operated infrequent... More
Northern Avenue Swing Bridge, Spanning Fort Point Channel at boundary ...
Significance: The Northern Avenue Swing Bridge, built in 1908, is one of only three surviving swing bridges built by the city of Boston in the late 19th and early 20th century. Today, still operated infrequent... More
Mobile Launcher One, Kennedy Space Center, Titusville, Brevard County,...
Structure associated with Apollo 4, Apollo 8, Apollo 11, Skylab & Apollo-Soyuz Test Project. Significance: The mobile launcher is a representative example of the engineering and technology used in the U.S. mann... More
Mobile Launcher One, Kennedy Space Center, Titusville, Brevard County,...
Structure associated with Apollo 4, Apollo 8, Apollo 11, Skylab & Apollo-Soyuz Test Project. Significance: The mobile launcher is a representative example of the engineering and technology used in the U.S. mann... More
Mobile Launcher One, Kennedy Space Center, Titusville, Brevard County,...
Structure associated with Apollo 4, Apollo 8, Apollo 11, Skylab & Apollo-Soyuz Test Project. Significance: The mobile launcher is a representative example of the engineering and technology used in the U.S. mann... More
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
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
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
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
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
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
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
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
Congress Street Bascule Bridge, Spanning Fort Point Channel at Congres...
Significance: The Congress Street Bridge, built in 1930, is a trunnion bascule bridge and the most recent of the five movable-truss bridges spanning the Fort Point Channel. It replaced a steam operated swing d... More
Speicher Bridge, Church Road over Tulpehocken Creek between Penn & Nor...
Significance: Speicher Bridge, a rural iron highway bridge, is a good example from the important mid-19th century era of metal bridge technology. Unprocessed Field note material exists for this structure: FN-7... More
Potomac Aqueduct, Spanning Potomac River, Washington, District of Colu...
Significance: The Potomac Aqueduct was an important component in the integrated canal system serving the Potomac River watershed. Built during a major expansion in America's long distance transportation system... More
Potomac Aqueduct, Spanning Potomac River, Washington, District of Colu...
Significance: The Potomac Aqueduct was an important component in the integrated canal system serving the Potomac River watershed. Built during a major expansion in America's long distance transportation system... More
Chicago, Milwaukee, St. Paul & Pacific Railroad Roundhouse, Kentucky A...
Significance: The roundhouse at Deer Lodge is part of one of the largest and earliest electrification projects in the U.S. as well as being the largest wooden structure of its type remaining in the U.S. Survey... More
Chicago, Milwaukee, St. Paul & Pacific Railroad Roundhouse, Kentucky A...
Significance: The roundhouse at Deer Lodge is part of one of the largest and earliest electrification projects in the U.S. as well as being the largest wooden structure of its type remaining in the U.S. Survey... More
Chicago, Milwaukee, St. Paul & Pacific Railroad Roundhouse, Kentucky A...
Significance: The roundhouse at Deer Lodge is part of one of the largest and earliest electrification projects in the U.S. as well as being the largest wooden structure of its type remaining in the U.S. Survey... More
Buffalo Gas Light Company, 249 West Genesee Street, Buffalo, Erie Coun...
Significance: The Buffalo Gas Light Company began the manufacture of illuminating gas from coal in horizontal retorts in 1848. At that time the designated lamp district in the city contained 179 lights with fa... 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
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
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
Delaware, Lackawanna & Western Railroad, Vestal Passenger & Freight St...
Significance: The station at Vestal is typical of the 19th century "combination" station (one that handled both passengers and freight separately under the same roof). This station is similar to another D, L &... More
Delaware, Lackawanna & Western Railroad, Vestal Passenger & Freight St...
Significance: The station at Vestal is typical of the 19th century "combination" station (one that handled both passengers and freight separately under the same roof). This station is similar to another D, L &... More
North Central Railroad, Baltimore Freight House, Guilford & Centre Str...
Significance: The Baltimore Freight Shed, built by the Northern Central Railroad, is a rare example of composite timber and iron roof construction of the mid 19th century. The roof structure is comprised of a ... More
North Central Railroad, Baltimore Freight House, Guilford & Centre Str...
Significance: The Baltimore Freight Shed, built by the Northern Central Railroad, is a rare example of composite timber and iron roof construction of the mid 19th century. The roof structure is comprised of a ... More
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,...
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
Philadelphia, Wilmington & Baltimore Railroad, President Street Statio...
Significance: As of 1974, the President St. Station was one of the oldest large city railroad terminals still standing in the United States. The station quite possibly contains one of the earliest uses of the ... More
Summer Street Retractile Bridge, Spanning Fort Point Channel at Summer...
Significance: The Summer St. bridge is a rare movable type of bridge known as a retractile draw, in which the moving span is pulled diagonally away from the navigable channel on several sets of rails. Only fou... More
Bridges of the Upper Tombigbee River Valley, Cochrane, Pickens County,...
Survey number: HAER AL-7 Public domain photograph - historical image of Alabama, United States, free to use, no copyright restrictions image - Picryl description
Bridges of the Upper Tombigbee River Valley, Cochrane, Pickens County,...
Survey number: HAER AL-7 Public domain photograph - historical image of Alabama, United States, free to use, no copyright restrictions image - Picryl description
City Pier A, Battery Place at Hudson River, New York, New York County,...
Significance: City Pier A is the oldest functioning pier in New York City. The pier and foundations represent a good example of the use of concrete in maritime projects in the late 19th century. The clock tow... More
Bridgeport Swing Span Bridge, Spanning Tennessee River, Bridgeport, Ja...
Significance: The Bridgeport Swing Span Railroad Bridge embodies the distinctive characteristics of a type, period and method of construction. Its method of construction (pin-connected) is rare for a swing bri... More
North Platte River Bowstring Truss Bridge, Spanning North Platte River...
STORED OFF SITE AND ON SITE. mchr Significance: The North Platte River Bowstring Truss Bridge is the first of its kind to be built in the then territory of Wyoming. It is also believed to be the first military... More
North Platte River Bowstring Truss Bridge, Spanning North Platte River...
STORED OFF SITE AND ON SITE. mchr Significance: The North Platte River Bowstring Truss Bridge is the first of its kind to be built in the then territory of Wyoming. It is also believed to be the first military... More
North Platte River Bowstring Truss Bridge, Spanning North Platte River...
STORED OFF SITE AND ON SITE. mchr Significance: The North Platte River Bowstring Truss Bridge is the first of its kind to be built in the then territory of Wyoming. It is also believed to be the first military... More
North Platte River Bowstring Truss Bridge, Spanning North Platte River...
STORED OFF SITE AND ON SITE. mchr Significance: The North Platte River Bowstring Truss Bridge is the first of its kind to be built in the then territory of Wyoming. It is also believed to be the first military... More
North Platte River Bowstring Truss Bridge, Spanning North Platte River...
STORED OFF SITE AND ON SITE. mchr Significance: The North Platte River Bowstring Truss Bridge is the first of its kind to be built in the then territory of Wyoming. It is also believed to be the first military... More
North Platte River Bowstring Truss Bridge, Spanning North Platte River...
STORED OFF SITE AND ON SITE. mchr Significance: The North Platte River Bowstring Truss Bridge is the first of its kind to be built in the then territory of Wyoming. It is also believed to be the first military... More
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
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
Sands Point Lighthouse, Middle Neck Road, Munsey Park, Nassau County, ...
Significance: The lighthouse at Sands Point is a representative example masonry lighthouse construction in the early 19th century. It is also an example of the many lighthouses that have aided navigation in and... More
Congress Street Bascule Bridge, Spanning Fort Point Channel at Congres...
Significance: The Congress Street Bridge, built in 1930, is a trunnion bascule bridge and the most recent of the five movable-truss bridges spanning the Fort Point Channel. It replaced a steam operated swing d... More
Congress Street Bascule Bridge, Spanning Fort Point Channel at Congres...
Significance: The Congress Street Bridge, built in 1930, is a trunnion bascule bridge and the most recent of the five movable-truss bridges spanning the Fort Point Channel. It replaced a steam operated swing d... More
Congress Street Bascule Bridge, Spanning Fort Point Channel at Congres...
Significance: The Congress Street Bridge, built in 1930, is a trunnion bascule bridge and the most recent of the five movable-truss bridges spanning the Fort Point Channel. It replaced a steam operated swing d... More
Speicher Bridge, Church Road over Tulpehocken Creek between Penn & Nor...
Significance: Speicher Bridge, a rural iron highway bridge, is a good example from the important mid-19th century era of metal bridge technology. Unprocessed Field note material exists for this structure: FN-7... More