Stormwater Management, Inc.

Controlling the flow: innovative screening device solves detention maintenance issues

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Courtesy of Stormwater Management, Inc.

Untitled Document

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 Creek’s banks during flooding. Since the joint project’s 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.

The Challenge

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 committee’s 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.

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