The Chamberlain is the only surviving bridge of the original five. The others were replaced as the river rose due to flood control dams put in place over time.
Bridges
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Image Caption: Members of the South Dakota Army National Guard’s 200th Engineer Company guide a raft on the Missouri River during a river crossing operation on June 11, 2016. The Chamberlain in the background is the only surviving bridge of the five. The others were replaced as the river expanded due to flood control dams.Era_date_from: 1920
1994
"Some of New Hampshire's most aesthetically pleasing yet least appreciated structures are stone arch bridges."
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Image Credit: Courtesy Flickr/Glass_house (CC BY-SA 2.0) Image Caption: The Gleason Falls Bridges, built in 1830, stands as a testament to the durability of dry-laid stone arches.Era_date_from: 1830
2002
"The majestic Forth Bridge ... symbolises the tremendous achievements of Victorian engineers and the immense strides made in the technique of bridge design and construction since the dawn of the Railway Age..."
- Derrick Bennett, Bridges: Great Buildings of the World
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Image Credit: Courtesy Flickr/Brain M Forbes (CC BY 2.0)Image Caption: The Forth Bridge became the longest bridge in the world when it was completed in 1890.Era_date_from: 1890
1985
"Fink's truss design was one of a number of early patented solutions to [the problem of how] to carry a massive, moving weight (a train) over long spans (to avoid the expense of building piers and obstructing waterways) on easily erected bridges (often in rough terrain) with good long-term economy..."
- Kent Farnow Smith, "America's Oldest Functioning Iron-Truss Bridge," 1978
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Image Credit: Courtesy Library of CongressImage Caption: This bridge is an example of the Fink truss, the most efficient solution to building long-span bridges quickly and economically during its time.Era_date_from: 1858
1979
Designed by William A. Truesdell, a railroad engineer, the Seventh Street Improvement Arches celebrates the engineering application of mathematics to improve living conditions.
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Image Credit: Courtesy Wikipedia/Elkman (CC BY-SA 3.0) Image Caption: Designed by William A. Truesdell, a railroad engineer, the Seventh Street Improvement Arches celebrates the engineering application of mathematics to improve living conditions.Era_date_from: 1883
2000