Engineers with the Portland District, Army Corps of Engineers (Corps) discuss the condition of the upstream gate on the John Day Dam navigation lock, located on the Columbia River near Rufus, Oregon, July 26 in between inspections of the gate after it malfunctioned due to a broken guide wheel. While the Corps works to fix the 215,000-pound vertical lift gate, it’s continuing to pass vessels through the lock using a floating bulkhead—a wall that can be moved in and out of place with a tugboat and essentially used as a temporary gate. Currently, vessel lockages, which typically take about 4
Engineers with the Portland District, Army Corps of Engineers (Corps) discuss the condition of the upstream gate on the John Day Dam navigation lock, located on the Columbia River near Rufus, Oregon, July 26 in between inspections of the gate after it malfunctioned due to a broken guide wheel. While the Corps works to fix the 215,000-pound vertical lift gate, it’s continuing to pass vessels through the lock using a floating bulkhead—a wall that can be moved in and out of place with a tugboat and essentially used as a temporary gate. Currently, vessel lockages, which typically take about 45 minutes, are taking twice as long. The guide wheels, two of which are attached to each side of the gate, act as rollers that keep the gate aligned as it moves up and down through its normal range of motion during lockages.
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Photo credit: © Operation 2022 / Alamy / Afripics
License: Licensed
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Keywords: columbia, dam, day, engineers, john, lock, navigation, repairs, river
