As we move closer to the 2019 milestone of opening the new State Route 99 tunnel under downtown Seattle, officials can start making plans for removal of the aging Alaskan Way Viaduct, the entire reason the new 1.7-mile tunnel was conceived originally.
It took three mobile cranes, including one of the largest mobile cranes in the country, working in a choreographed effort to successfully lower the new Tukwila Urban Center Pedestrian/Bicycle Bridge across the Green River in July.
It really doesn’t come at a great surprise that the second waste tunnel associated with the Plutonium Uranium Extraction Plant (PUREX) at the Dept. of Energy’s Hanford Nuclear Waste Site in southeast Washington is at risk of collapse.
The completion of the first of two 300-ton nuclear waste melters at Hanford’s Vit Plant has contractor Bechtel National Inc. looking forward to continued progress on what is arguably the nation’s most complex construction project.
As demolition continued on the Hanford Plutonium Finishing Plant on June 8, one of the two dozen air monitoring stations positioned around the site sounded an alarm after detecting low levels of contamination.