The French Prairie Bridge over the Willamette River near I-5 at Wilsonville would be a dual-purpose bridge designed to provide a safe passage for pedestrians and bicyclists, and to allow emergency-services vehicles to respond promptly to either side of the Willamette River when an incident has closed I-5 to traffic.
The overall bridge width is expected to be approximately 21 feet with the travel pathway width approximately equivalent to one vehicular travel lane, or about 13 feet. The design includes protective railing on each side of the pathway.
The Willamette River is a significant barrier to bicyclists and pedestrians traveling between the valley and the metro region. The lack of any river crossing other than the I-5 Boone Bridge forces cyclists to take significant risks by traveling on a six-lane freeway with no separation from high-speed trucks and cars.
The French Prairie Bridge will be engineered to allow emergency-services vehicles like fire-trucks, ambulances and tow-trucks to cross over and respond to incidents when I-5 is closed in the vicinity of the Boone Bridge.
The French Prairie Bridge takes advantage of existing public investments north and south of the river by making a critical connection for the Portland metro Tonquin Trail, the historic Champoeg Trail, the Willamette Valley Scenic Bikeway, and for cyclists traveling by WES commuter rail. It will serve as an impressive gateway to the North Willamette Valley's French Prairie region while creating a fully integrated regional trail system connecting Portland with the Willamette Valley.
City of Wilsonville