Geography and time weren’t on the side of Mortenson when it needed to design and build a new siphon to move 22 million gallons of wastewater as part of an upgrade to a 42-year-old water system in Oregon.
Home to the largest ferry terminal building in the state, Colman Dock’s upgrades coincide with the new tunnel and viaduct removal work near the waterfront.
As Seattle's new State Route 99 tunnel welcomes vehicle traffic, crews continue to demolish the aging (it opened in 1953) and vulnerable Alaskan Way Viaduct along the waterfront.
The first phase of the next series of 520 projects in the Rest of the West package begins this spring, covering the area west of Lake Washington and the floating bridge.