NILE, Wash. – A gigantic landslide that buried a highway, uprooted homes and rerouted a river in Washington state's Cascade Range left hundreds of smaller victims: fish. The landslide that inundated the Naches River last month created a barrier of millions of cubic yards of silt, mud and rock that slowed — and likely confused — spawning salmon and hungry trout. Then workers opened a freshly dug river channel that stranded small fish in ponds and marshes. Fisheries biologists from 10 government agencies and private groups are working shifts to try to save the fish. The effort marks a step...