Tree debris at Bonneville Dam

Removing a large floating tree caught at Bonneville Dam
U.S. Army Corps of Engineers photo

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Spring rains can wash branches, limbs and trees into tributaries that find their way into the Columbia River. The Corps’ dams have bypass systems designed to keep these and other floating hazards safely away from turbines.

It’s unusual to see large trees pass the dam, so engineers were surprised to find a 60-foot tree with its rootball still attached, stuck in the bypass system. With the help of a crane, workers were able to safely extract the estimated 25,000-pound, nearly 6-foot diameter behemoth. After it was free, the tree was cut into smaller sections before workers allowed it to continue its travel to the sea.

News releasesRSS Feed icon

5/14/2012  Corps seeks comments on revised draft Environmental Assessment

5/14/2012  Summer recreational vessel lockage schedule begins May 15

5/14/2012  Corps to host Rogue water management meeting

5/7/2012  Corps to host geology weekend May 19


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New public notices

Comment by June 14: PN and draft EA on Lost Creek Project fire protection.

Comment by May 26: PN, draft EA and draft FONSI on Mount St. Helens Sediment Retention Structure spillway raise.

Public Notice: Announcing the regional conditions for the nationwide permits in Oregon

Public Notice: Final EA for cormorant dissuasion on Sand Island and FONSI

Special Public Notice: Port of Longview's funding of Corps under the WRDA


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