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Culvert-to-bridge project improves safety, fish habitats in Beaver Creek in Troutdale

COURTESY PHOTO: MULTNOMAH COUNTY TRANSPORTATION DIVISION  - The completion of a new bridge over Beaver Creek allows traffic to flow again on Southeast Cochran Road in Troutdale on Tuesday, Nov. 19. Remaining landscaping work along the shoulders could intermittently slow traffic, but vehicles otherwise should be able to move freely along the thoroughfare. Multnomah County has reopened Southeast Cochran Road in Troutdale following a five-month closure to build a new bridge over Beaver Creek. Even though both lanes of traffic were open to vehicles on Tuesday, Nov. 19, drivers should expect intermittent shoulder closures with flaggers directing traffic throughout the week, as some landscaping needs to be finalized.

Throughout this project, the county replaced an undersized and aging concrete box culvert with a 60-foot long concrete bridge structure. New retaining walls were built to widen the roadway at the crossing, and an extensive drainage system was installed to divert polluted runoff from the road away from the creek.

With Multnomah County offficials noting that Beaver Creek is one of the best salmon habitats in urban East County, the Cochran Road bridge is one of three culvert improvement projects that aims to improve fish passage along Beaver Creek beneath county roads.

The Stark Street culvert was replaced in 2017, and improvements were completed for the Troutdale Road culvert in 2018. These three projects opened up more than six miles of fish habitat.

Multnomah County officials said they wanted to thank local residents for their patience during this closure.

For more information about the SE Cochran Road bridge project, visit

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