Significance: The Boston & Maine Railroad built wood and iron truss bridges into the twentieth century, long after most other railroads had switched to all-metal bridges. The Essex Street Bridge is representat More
Significance: The Boston & Maine Railroad built wood and iron truss bridges into the twentieth century, long after most other railroads had switched to all-metal bridges. The Essex Street Bridge is representat More
Significance: The Boston & Maine Railroad built wood and iron truss bridges into the twentieth century, long after most other railroads had switched to all-metal bridges. The Essex Street Bridge is representat More
Significance: The Boston & Maine Railroad built wood and iron truss bridges into the twentieth century, long after most other railroads had switched to all-metal bridges. The Essex Street Bridge is representat More
Significance: The New Bedford-Fairhaven Middle Bridge is a relatively early example of electric power applied to a moveable bridge span, and is one of the longest (288') surviving swing spans in Massachusetts, More
Significance: The New Bedford-Fairhaven Middle Bridge is a relatively early example of electric power applied to a moveable bridge span, and is one of the longest (288') surviving swing spans in Massachusetts, More
Significance: The New Bedford-Fairhaven Middle Bridge is a relatively early example of electric power applied to a moveable bridge span, and is one of the longest (288') surviving swing spans in Massachusetts, More
Significance: The New Bedford-Fairhaven Middle Bridge is a relatively early example of electric power applied to a moveable bridge span, and is one of the longest (288') surviving swing spans in Massachusetts, More
Significance: The New Bedford-Fairhaven Middle Bridge is a relatively early example of electric power applied to a moveable bridge span, and is one of the longest (288') surviving swing spans in Massachusetts, More
Significance: The New Bedford-Fairhaven Middle Bridge is a relatively early example of electric power applied to a moveable bridge span, and is one of the longest (288') surviving swing spans in Massachusetts, More
Significance: The New Bedford-Fairhaven Middle Bridge is a relatively early example of electric power applied to a moveable bridge span, and is one of the longest (288') surviving swing spans in Massachusetts, More
Significance: The New Bedford-Fairhaven Middle Bridge is a relatively early example of electric power applied to a moveable bridge span, and is one of the longest (288') surviving swing spans in Massachusetts, More
Significance: The New Bedford-Fairhaven Middle Bridge is a relatively early example of electric power applied to a moveable bridge span, and is one of the longest (288') surviving swing spans in Massachusetts, More
Significance: The New Bedford-Fairhaven Middle Bridge is a relatively early example of electric power applied to a moveable bridge span, and is one of the longest (288') surviving swing spans in Massachusetts, More
Significance: The New Bedford-Fairhaven Middle Bridge is a relatively early example of electric power applied to a moveable bridge span, and is one of the longest (288') surviving swing spans in Massachusetts, More
Significance: The New Bedford-Fairhaven Middle Bridge is a relatively early example of electric power applied to a moveable bridge span, and is one of the longest (288') surviving swing spans in Massachusetts, More
Significance: The New Bedford-Fairhaven Middle Bridge is a relatively early example of electric power applied to a moveable bridge span, and is one of the longest (288') surviving swing spans in Massachusetts, More
Significance: The New Bedford-Fairhaven Middle Bridge is a relatively early example of electric power applied to a moveable bridge span, and is one of the longest (288') surviving swing spans in Massachusetts, More
Significance: The Schell Memorial Bridge is the third oldest of five known Pennsylvania truss bridges identified in the Massachusetts Department of Public Works database. It is a unique variation at least in More
Significance: The Schell Memorial Bridge is the third oldest of five known Pennsylvania truss bridges identified in the Massachusetts Department of Public Works database. It is a unique variation at least in More
Significance: The Schell Memorial Bridge is the third oldest of five known Pennsylvania truss bridges identified in the Massachusetts Department of Public Works database. It is a unique variation at least in More
Significance: The Schell Memorial Bridge is the third oldest of five known Pennsylvania truss bridges identified in the Massachusetts Department of Public Works database. It is a unique variation at least in More
Significance: The Schell Memorial Bridge is the third oldest of five known Pennsylvania truss bridges identified in the Massachusetts Department of Public Works database. It is a unique variation at least in More
Significance: The Schell Memorial Bridge is the third oldest of five known Pennsylvania truss bridges identified in the Massachusetts Department of Public Works database. It is a unique variation at least in More
Significance: The Schell Memorial Bridge is the third oldest of five known Pennsylvania truss bridges identified in the Massachusetts Department of Public Works database. It is a unique variation at least in More
Significance: The Schell Memorial Bridge is the third oldest of five known Pennsylvania truss bridges identified in the Massachusetts Department of Public Works database. It is a unique variation at least in More
Significance: The Essex-Merrimac Bridge is a 225-foot, single-span suspension bridge, which crosses the Merrimac River at the site of a previous Palladian, arched timber truss (1792-1810) built by Timothy Palme More
Significance: The Essex-Merrimac Bridge is a 225-foot, single-span suspension bridge, which crosses the Merrimac River at the site of a previous Palladian, arched timber truss (1792-1810) built by Timothy Palme More
Significance: The Essex-Merrimac Bridge is a 225-foot, single-span suspension bridge, which crosses the Merrimac River at the site of a previous Palladian, arched timber truss (1792-1810) built by Timothy Palme More
Significance: The Essex-Merrimac Bridge is a 225-foot, single-span suspension bridge, which crosses the Merrimac River at the site of a previous Palladian, arched timber truss (1792-1810) built by Timothy Palme More
Significance: The Essex-Merrimac Bridge is a 225-foot, single-span suspension bridge, which crosses the Merrimac River at the site of a previous Palladian, arched timber truss (1792-1810) built by Timothy Palme More
Significance: The Essex-Merrimac Bridge is a 225-foot, single-span suspension bridge, which crosses the Merrimac River at the site of a previous Palladian, arched timber truss (1792-1810) built by Timothy Palme More
Significance: The Essex-Merrimac Bridge is a 225-foot, single-span suspension bridge, which crosses the Merrimac River at the site of a previous Palladian, arched timber truss (1792-1810) built by Timothy Palme More
Significance: The Essex-Merrimac Bridge is a 225-foot, single-span suspension bridge, which crosses the Merrimac River at the site of a previous Palladian, arched timber truss (1792-1810) built by Timothy Palme More
Significance: The Essex-Merrimac Bridge is a 225-foot, single-span suspension bridge, which crosses the Merrimac River at the site of a previous Palladian, arched timber truss (1792-1810) built by Timothy Palme More
Significance: The Essex-Merrimac Bridge is a 225-foot, single-span suspension bridge, which crosses the Merrimac River at the site of a previous Palladian, arched timber truss (1792-1810) built by Timothy Palme More
Significance: The Essex-Merrimac Bridge is a 225-foot, single-span suspension bridge, which crosses the Merrimac River at the site of a previous Palladian, arched timber truss (1792-1810) built by Timothy Palme More
Significance: The Essex-Merrimac Bridge is a 225-foot, single-span suspension bridge, which crosses the Merrimac River at the site of a previous Palladian, arched timber truss (1792-1810) built by Timothy Palme More
Significance: Erected in 1901, Structure No. 30S, the Wellman-Seaver Folding Gantry Crane, or Crane S-1, is significant as the oldest and longest-operating crane in the Quincy-Fore River Shipyard. Located on P More
Significance: Erected in 1901, Structure No. 30S, the Wellman-Seaver Folding Gantry Crane, or Crane S-1, is significant as the oldest and longest-operating crane in the Quincy-Fore River Shipyard. Located on P More
Significance: Erected in 1901, Structure No. 30S, the Wellman-Seaver Folding Gantry Crane, or Crane S-1, is significant as the oldest and longest-operating crane in the Quincy-Fore River Shipyard. Located on P More
Significance: Erected in 1901, Structure No. 30S, the Wellman-Seaver Folding Gantry Crane, or Crane S-1, is significant as the oldest and longest-operating crane in the Quincy-Fore River Shipyard. Located on P More
Significance: Erected in 1901, Structure No. 30S, the Wellman-Seaver Folding Gantry Crane, or Crane S-1, is significant as the oldest and longest-operating crane in the Quincy-Fore River Shipyard. Located on P More
Significance: Erected in 1901, Structure No. 30S, the Wellman-Seaver Folding Gantry Crane, or Crane S-1, is significant as the oldest and longest-operating crane in the Quincy-Fore River Shipyard. Located on P More
Significance: Erected in 1901, Structure No. 30S, the Wellman-Seaver Folding Gantry Crane, or Crane S-1, is significant as the oldest and longest-operating crane in the Quincy-Fore River Shipyard. Located on P More
Significance: Erected in 1901, Structure No. 30S, the Wellman-Seaver Folding Gantry Crane, or Crane S-1, is significant as the oldest and longest-operating crane in the Quincy-Fore River Shipyard. Located on P More
Significance: Erected in 1901, Structure No. 30S, the Wellman-Seaver Folding Gantry Crane, or Crane S-1, is significant as the oldest and longest-operating crane in the Quincy-Fore River Shipyard. Located on P More
Significance: Erected in 1901, Structure No. 30S, the Wellman-Seaver Folding Gantry Crane, or Crane S-1, is significant as the oldest and longest-operating crane in the Quincy-Fore River Shipyard. Located on P More
Significance: The Marion Street Bridge is one of only twelve known surviving double-intersection Warren pony trusses in New England. It was one of many bridges manufactured and erected for the Boston & Albany More
Significance: The Marion Street Bridge is one of only twelve known surviving double-intersection Warren pony trusses in New England. It was one of many bridges manufactured and erected for the Boston & Albany More
Significance: The Marion Street Bridge is one of only twelve known surviving double-intersection Warren pony trusses in New England. It was one of many bridges manufactured and erected for the Boston & Albany More
Significance: The Marion Street Bridge is one of only twelve known surviving double-intersection Warren pony trusses in New England. It was one of many bridges manufactured and erected for the Boston & Albany More
Significance: The Marion Street Bridge is one of only twelve known surviving double-intersection Warren pony trusses in New England. It was one of many bridges manufactured and erected for the Boston & Albany More
Significance: The Marion Street Bridge is one of only twelve known surviving double-intersection Warren pony trusses in New England. It was one of many bridges manufactured and erected for the Boston & Albany More
Significance: The Marion Street Bridge is one of only twelve known surviving double-intersection Warren pony trusses in New England. It was one of many bridges manufactured and erected for the Boston & Albany More
Significance: The Marion Street Bridge is one of only twelve known surviving double-intersection Warren pony trusses in New England. It was one of many bridges manufactured and erected for the Boston & Albany More
Significance: The Marion Street Bridge is one of only twelve known surviving double-intersection Warren pony trusses in New England. It was one of many bridges manufactured and erected for the Boston & Albany More
Significance: The Marion Street Bridge is one of only twelve known surviving double-intersection Warren pony trusses in New England. It was one of many bridges manufactured and erected for the Boston & Albany More
Significance: The Marion Street Bridge is one of only twelve known surviving double-intersection Warren pony trusses in New England. It was one of many bridges manufactured and erected for the Boston & Albany More
Significance: The Weston Road Bridge is the oldest of twelve known surviving double-intersection Warren pony truss bridges in New England. It was one of many bridges manufactured and erected for the Boston & A More
Significance: The Weston Road Bridge is the oldest of twelve known surviving double-intersection Warren pony truss bridges in New England. It was one of many bridges manufactured and erected for the Boston & A More
Significance: The Weston Road Bridge is the oldest of twelve known surviving double-intersection Warren pony truss bridges in New England. It was one of many bridges manufactured and erected for the Boston & A More
Significance: The Weston Road Bridge is the oldest of twelve known surviving double-intersection Warren pony truss bridges in New England. It was one of many bridges manufactured and erected for the Boston & A More
Significance: The Weston Road Bridge is the oldest of twelve known surviving double-intersection Warren pony truss bridges in New England. It was one of many bridges manufactured and erected for the Boston & A More
Significance: The Weston Road Bridge is the oldest of twelve known surviving double-intersection Warren pony truss bridges in New England. It was one of many bridges manufactured and erected for the Boston & A More
Significance: The Weston Road Bridge is the oldest of twelve known surviving double-intersection Warren pony truss bridges in New England. It was one of many bridges manufactured and erected for the Boston & A More
Significance: The Weston Road Bridge is the oldest of twelve known surviving double-intersection Warren pony truss bridges in New England. It was one of many bridges manufactured and erected for the Boston & A More
Significance: The Weston Road Bridge is the oldest of twelve known surviving double-intersection Warren pony truss bridges in New England. It was one of many bridges manufactured and erected for the Boston & A More
Significance: The Weston Road Bridge is the oldest of twelve known surviving double-intersection Warren pony truss bridges in New England. It was one of many bridges manufactured and erected for the Boston & A More
Significance: The Bardwell's Ferry Bridge is an excellent, virtually unaltered, example of William Douglas's 1878 patent for a wrought-rion lenticular truss bridge. It is one of approximately fifty lenticular More
Significance: The Bardwell's Ferry Bridge is an excellent, virtually unaltered, example of William Douglas's 1878 patent for a wrought-rion lenticular truss bridge. It is one of approximately fifty lenticular More
Significance: The Bardwell's Ferry Bridge is an excellent, virtually unaltered, example of William Douglas's 1878 patent for a wrought-rion lenticular truss bridge. It is one of approximately fifty lenticular More
Significance: The Bardwell's Ferry Bridge is an excellent, virtually unaltered, example of William Douglas's 1878 patent for a wrought-rion lenticular truss bridge. It is one of approximately fifty lenticular More
Significance: The Bardwell's Ferry Bridge is an excellent, virtually unaltered, example of William Douglas's 1878 patent for a wrought-rion lenticular truss bridge. It is one of approximately fifty lenticular More
Significance: The Bardwell's Ferry Bridge is an excellent, virtually unaltered, example of William Douglas's 1878 patent for a wrought-rion lenticular truss bridge. It is one of approximately fifty lenticular More
Significance: The Bardwell's Ferry Bridge is an excellent, virtually unaltered, example of William Douglas's 1878 patent for a wrought-rion lenticular truss bridge. It is one of approximately fifty lenticular More
Significance: The Bardwell's Ferry Bridge is an excellent, virtually unaltered, example of William Douglas's 1878 patent for a wrought-rion lenticular truss bridge. It is one of approximately fifty lenticular More
Significance: The Bardwell's Ferry Bridge is an excellent, virtually unaltered, example of William Douglas's 1878 patent for a wrought-rion lenticular truss bridge. It is one of approximately fifty lenticular More
Significance: The Bardwell's Ferry Bridge is an excellent, virtually unaltered, example of William Douglas's 1878 patent for a wrought-rion lenticular truss bridge. It is one of approximately fifty lenticular More
Significance: The Bardwell's Ferry Bridge is an excellent, virtually unaltered, example of William Douglas's 1878 patent for a wrought-rion lenticular truss bridge. It is one of approximately fifty lenticular More
Significance: The Bardwell's Ferry Bridge is an excellent, virtually unaltered, example of William Douglas's 1878 patent for a wrought-rion lenticular truss bridge. It is one of approximately fifty lenticular More
Significance: The Bardwell's Ferry Bridge is an excellent, virtually unaltered, example of William Douglas's 1878 patent for a wrought-rion lenticular truss bridge. It is one of approximately fifty lenticular More
Significance: The Bardwell's Ferry Bridge is an excellent, virtually unaltered, example of William Douglas's 1878 patent for a wrought-rion lenticular truss bridge. It is one of approximately fifty lenticular More
Significance: The Bardwell's Ferry Bridge is an excellent, virtually unaltered, example of William Douglas's 1878 patent for a wrought-rion lenticular truss bridge. It is one of approximately fifty lenticular More
Significance: The Bardwell's Ferry Bridge is an excellent, virtually unaltered, example of William Douglas's 1878 patent for a wrought-rion lenticular truss bridge. It is one of approximately fifty lenticular More
Significance: The Bardwell's Ferry Bridge is an excellent, virtually unaltered, example of William Douglas's 1878 patent for a wrought-rion lenticular truss bridge. It is one of approximately fifty lenticular More