Workers use a truss to lower the 380-tons of concrete span into place. (Photo by Armando Trull/WAMU)
(Armando Trull – Washington, DC, WAMU) The Silver Line to Dulles marked a major milestone Tuesday. Construction crews are fitting into place the final span for the bridges to carry the Silver Line trains.
“This marks the completion of the aerial structure of this project through Tyson’s Corner,” says Patrick Nowakowski, the executive director of the Dulles Corridor Metrorail Project. “We have over three miles of aerial structure and this is the last span being set into place.”
The crews are using a truss longer than a football field to lift and move the 380-ton span, made up of 12 custom-cast concrete segments. .................(more)