John Hennessy III,
P.E.
The challenges of underwater engineering are remarkable, but technology is driving innovation. Underwater engineering is not for the faint of heart—or the short of breath. These projects require advanced know-how, sophisticated technology and a willingness to push the boundaries of conventional thinking— and engineering.
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There are 47,052 bridges classified as structurally deficient and considered to be in poor condition, according to a new ARTBA analysis of the recently released U.S. Department of Transportation’s 2018 National Bridge Inventory (NBI) database. If placed end-to-end, they would stretch nearly 1,100 miles—the distance between Chicago and Houston.
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Timelapse video shows construction of Christina River Bridge in Wilmington, DE. The purpose of the bridge is to add another access point to Wilmington Riverfront attractions and to improve access to US 13, I-495 and I-95. The project includes the bridge approaches and connections to the existing street grid.
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The eastern section of the Tappan Zee Bridge was brought down by controlled explosive charges. The bridge formerly spanned the Hudson River and was replaced by the Mario M. Cuomo Bridge. –NJ.com on YouTube
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The construction of the Hudson River Bridge (it was not called the George Washington Bridge until it was nearly done) was one of the engineering marvels of its day. The longest suspension bridge in the world when it opened, it opened a year early because construction went faster than planned.
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Los Angeles’ authorities are replacing the iconic Sixth Street viaduct with an impressive earthquake-proof structure.
Read the full story on this video, including images and useful links, here: https://www.theb1m.com/video/building-los-angeles-earthquake-proof-bridge
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Demo work has begun on one of the I-105 bridges in Eugene. This work kicks off the first phase of a two-year construction project that will address I-105 bridges and ramps between the Delta Highway interchange and downtown Eugene.
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While preparing underwater repairs to a bridge, divers found an unexploded military ordnance.
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A significant number of Connecticut’s bridges have surpassed or are approaching 50 years old, which is typically the initial intended design life for bridges of that age. In fact, 59 percent of the state’s bridges are 50 years or older, the fourth highest rate in the nation. The average age of all Connecticut’s bridges is 53 years, while the average age of the state’s more than 300 structurally deficient bridges is 69 years.
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Bridges have been vital for transportation throughout the course of history. In the beginning, they were simple structures built using natural resources like logs, stone and mud. But as civilization evolved, so did the infrastructure of bridges — becoming far more significant than a means of getting from point A to point B. Bridges have managed to influence our cultures and improve the way we travel, do business and forge policies.
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