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  • March

    Climbers inspect downstream navigation lock gates during an annual lock outage at Bonneville Dam, Mar. 1, 2022. The U.S. Army Corps of Engineers, Portland District technicians perform annual maintenance on the navigation locks at Bonneville, The Dalles and John Day dams during these outages. The series of locks on the Lower Columbia are a vital piece of transportation infrastructure and the Corps performs maintenance during scheduled outages, which ensure that these systems stay open on a reliable schedule. To maintain safe and reliable passage through this valuable navigation system, the Corps coordinates the annual lock closures with inland shippers and cruise lines to minimize impacts to those users.

    Climbers inspect Bonneville Lock's miter gate

    The U.S. Army Corps of Engineers maintains and assesses the locks along the Columbia and Snake rivers on an annual basis to keep an estimated $23 billion dollars’ worth of commerce flowing.

  • October

    A Pacific lamprey clings to a fish viewing window at Bonneville Lock & Dam. Engineers didn’t design the fish ladders, which successfully move salmon upstream of the lower Columbia River dams (Bonneville, The Dalles and John Day) with lamprey in mind. But that’s changing. (U.S. Army photo by Lesley McClintock)

    That sounds fishy: demonized trash fish finally gets some respect

    Leaves are changing, the weather is cooling and getting wetter, and Fred Meyer is stocking its shelves with Christmas decorations, which means it’s October. Instead of skipping ahead to winter holidays, let’s fall back and celebrate autumn and Halloween by highlighting a fish that has been demonized in the past, partly for its looks, and partly for our past perceptions of it as a blood-sucking, bottom-feeding trash fish*: the Pacific lamprey.

  • September

    A look inside the the cracks and damage to the concrete sill exposed and broken rebar inside the navigation lock's concrete.

    The Anatomy of an Outage: A Look Back at Bonneville Navigation Lock's Sill Failure

    On Sept. 5, 2019, a long unknown and undetected flaw became an impending failure at Bonneville navigation lock. More than 70 feet underwater, sections of rebar, threaded through 40,000 pounds of concrete, had stretched and bent until the strain snapped them. The now deformed steel bars were no match for the force of water that came every time the lock filled with water to pass vessels through the lock.

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