US Army Corps photo The U.S. Army Corps of Engineers’ Portland District (Corps) will move forward this spring with a two-year safety and seismic repair project at Willamette Falls Locks ahead of the agency’s official transfer of the historic navigation lock system to the Willamette Falls Locks Authority, expected to take place in 2026.

The U.S. Army Corps of Engineers' Portland District (Corps) has awarded a construction contract for completing safety and seismic repairs at Willamette Falls Locks before the agency's official transfer of the historic navigation lock system to the Willamette Falls Locks Authority, expected to take place in 2026.

The Corps has awarded the construction contract for completing the seismic retrofits to Vancouver-based Northbank Civil and Marine Inc.

The Corps has owned the locks, placed into operation in 1873 to move river traffic around the 40-foot horseshoe-shaped falls between Oregon City and West Linn, since around 1915. In 2011, the agency closed the locks due to safety concerns and began a disposition study to determine the level of federal interest in retaining the structure.

In 2019, it made the final decision to transfer ownership of the lock system.

"We're really excited to complete these seismic repairs so we can transfer the locks to the Willamette Falls Locks Authority, and they can further develop them into the future," said Col. Mike Helton, commander of the Corps' Portland District. "We understand deeply how much this iconic and beloved piece of infrastructure means to our communities, and we want to give it back to them in the safest and most responsible way possible."

The two-year seismic retrofit project will kick off this spring with geotechnical explorations, which will involve drilling a series of holes to investigate the lock system's substructure and ensure that seismic anchors installed throughout the repairs have been properly designed.

Upon completion of the repairs, the Corps will officially transfer the locks to the Willamette Falls Locks Authority, an 11-member public corporation established by the Oregon Legislature in 2021 to assume ownership of the lock system and oversee additional refurbishments.

About Williamette Locks

Built in the early 1870s by the People's Transportation Company, with aid from the State of Oregon, the Willamette Falls Locks is a system of four navigation locks constructed to help river traffic move around Willamette Falls, which spills over a rocky, basaltic, horseshoe-shaped reef about 41 feet high between Oregon City and West Linn.

The lock system opened on New Year's Day in 1873. Ownership of the locks changed hands several times before the Corps purchased them around 1915 from Portland Railway Light and Power Company. The agency operated the locks for commercial and recreational vessel passage for nearly 100 years.

At one point, in the 1960s, the locks were passing more than 1 million tons of commerce per year, with an average of more than 8,500 lockages per year, many of which took place for tugboats towing rafted logs.

The Corps closed the locks in 2011 due to safety concerns and decided in 2019 to transfer the structure. The lock system is the oldest multi-lift bypass navigation lock in the nation that is currently in non-operational status.

For more information, visit https://www.nwp.usace.army.mil/willamette/locks/.

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