It took 96 strategically placed explosives to implode an 80-year-old steel bridge in Pennsylvania to make way for a new one.
The Allegheny County Public Works Department imploded the 635-foot-long Dooker’s Hollow Bridge on February 13. The implosion sucked 470 tons of steel down 70 feet. The explosives were placed in 54 locations on the old bridge, according to the department.
Allegheny County tweeted out these videos of the implosion – one at actual speed and one in slow motion:
The implosion was conducted by Allison Park Contractors and Demtech. The bridge linked North Braddock Borough and East Pittsburgh Borough over O’Connell Boulevard.
Construction of a new steel girder bridge is planned to begin in March. Allison Park Contractors was awarded the contract for the $9.95 million project.
