Water flows through ladder
Water flows through a fish ladder at John Day Dam in eastern Oregon. Fish ladders are effective at allowing fish to swim upstream of low-head or shorter dams on the Columbia River. John Day’s ladder is 1,080 feet long. (U.S. Army photo by Karim Delgado)

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Photo by: Karim Delgado |  VIRIN: 160927-A-VN916-1002.JPG