Two Washington Bridges Win PCI Design Awards

Staff | September 28, 2010

Chicago— Two bridge projects in Washington were among 11 bridges to be named winners in the 2006 Design Awards competition sponsored by the Precast/Prestressed Concrete Institute.

The competition recognizes standout projects that made effective use of precast concrete components in a variety of building and bridge categories.

The S. 317th Street HOV Direct Access Bridge in Federal Way, Wash., won the award as the Best Owner-Designed. The 128-foot, single-span bridge serves as a "flyover stop" for regional mass-transit buses. The project was the first to use the PGSplice computer software program written by the Washington Department of Transportation. Tight right-of-way constraints and adjacent roadways created erection challenges for the designers.

The project was designed by the Washington State Department of Transportation in Tumwater, Wash., with Icon Materials/Arvy Construction, a joint venture in Seattle, serving as general contractor. Concrete Technology Corp. in Tacoma, Wash., produced the precast concrete components.

The historic Monroe Street Bridge in downtown Spokane, Wash., won the award as the Best Rehabilitated Bridge. The 896-foot-long bridge spans the Spokane River Gorge in downtown Spokane. The project required removing and replacing the deck system, spandrel arches and columns down to the main arches and the viaduct on the north end of the bridge.

The design team worked closely with the State Historical Preservation Office and the local Landmarks Commission to develop historically and economically acceptable solutions for this five-year, $18-million project. After six deck systems were evaluated, precast concrete components were selected for use on the sub-deck structural system and the pedestrian railing.

The project was designed by David Evans & Associates of Spokane, with Wildish Standard Paving of Eugene, Ore., serving as the general contractor. Central Pre-Mix Prestress Co. in Spokane produced the precast concrete components.