A nine-year, $5.29 million road improvement joint venture between the City of Beaverton, Ore. and Washington County widened 5,680 feet of a two-lane road. It also improved traffic flow and reduced the erosion of nearby Johnson Creeks banks during flooding. Since the joint projects completion in June 2004, the community enjoys planted medians, new curbs, sidewalks, bike lanes, a pedestrian bridge, as well as improved storm drains and treatment of stormwater runoff.
Rick Raetz, PE, principal engineer for the Washington County Department of
Land Use and Transportation, designed two underground detention tanks to address
area flooding issues and meet the project advisory committees requirements
for urban runoff, wetlands and stormwater. Each tank had a small outlet to attenuate
the smaller, more frequent storms eroding the Johnson Creek banks.