The Oregon Dept. of Transportation's new plans for the state's historically plagued $217-million U.S. 20 project will focus on culverts as the only viable way to deal with chronic issues of unstable soils and shifting bridge bents.
Yaquina River Constructors, the design-build team led by Watsonville, Calif.-based Granite Construction Co. with subsidiaries, had begun work on the 6.5-mile project in 2006. Near the coast, the new Pioneer Mountain-to-Eddyville route is intended to bypass a windy 10-mile mountainous stretch.
Because it can moderate the damaging effects of earthquakes, base-isolation is a technique used primarily in seismically active regions. ENR takes a look at some of the largest applications of base-isolation technologies in the world.