Who even knew that there was a contest to see who can demolish stuff the best? Canadian firm Priestly Demolition, Inc. (PDI) won the 2016 World Demolition Award for best project for their masterful work on a project in Ontario, Canada.
Due to environmental concerns, a bridge needed to be removed without using explosives. In just a week’s time, braving subzero temperatures, PDI successfully dismantled the bridge. Construction Junkie’s Shane Hedmond has more:
The original Nipigon River Bridge was constructed in 1937 as a simple steel deck truss bridge. 37 years later, in 1974, steel girders replaced the truss and it had remained the same ever since. In 2013, a $106 project was started that would replace the old bridge with a new 4 lane bridge and close down the old one. PDI was contracted as the demolition company responsible for removing the old bridge.
The Nipigon River is the largest tributary of Lake Superior and, because of that, there were many environmental concerns for the river wildlife and surrounding habitats. Not only that, but the company had to worry about the recently constructed first half of the new bridge which sat directly adjacent to the old bridge. The old bridge stood 100 feet (30m) above the water and spanned 827 feet (252 meters). Without being able to disturb the water below, the team ultimately decided to jack the bridge up and use hydraulic rollers to move the girders off of the supporting piers and onto land.
Without further ado, I present a 24-minute long video produced by PDI showing the process in depth: