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John Day dam (#0338)

John Day dam (#0338)
The navigational lock at the John Day dam has a lift of 110 feet, the highest in the U.S. Per the following site, the lock averaged 6 commercial vessels per day in 2010: www.nwp.usace.army.mil/Portals/24/docs/locations/johnday/JohnDay_FS_2013.pdf

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