T.Y. Lin International

Scope Of Work

T. Y. Lin International’s Crooked River Bridge is a landmark crossing over the Crooked River in eastern Oregon. The innovatively-constructed new concrete arch bridge crosses a dramatic basalt rock gorge almost 328 feet above the Crooked River. With a 410-foot arch span and a 6.5-foot-thick arch rib at the canyon rims that tapers to just 4 feet at the crown this 4 lane bridge leaps across the basalt rock canyon. The 79-foot-wide structure carries four lanes of traffic and was built in 28-foot segments. The arch span supports a concrete box girder that spans 20 feet between spandrel columns.

T.Y. Lin International developed an innovative construction solution which integrated modern cable-stayed technology with classic concrete arch construction techniques. Steel cables attached to 184-feet-high temporary stay towers suspended segmental travelers as each segment was cast, moving from the canyon rims towards the center. The segmental construction of a concrete arch at a limited-access, deep gorge site was new to the U.S. bridge market.