Federal officials walk across the Derby Dam in Wadsworth, Nev.,as Truckee River water flows beneath on Wednesday, Sept. 11, 2019 about 20 miles east of Reno, Nevada. The U.S. Bureau of Reclamation has launched a $23.5 million fish diversion project to help the threatened Lahontan cutthroat trout pass upstream to their native spawning grounds cutoff since the dam was built in 1905. Before that, the trout would migrate from Pyramid Lake in the high desert 120 miles upstream to spawn in Lake Tahoe. (AP Photo/Scott Sonner)
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