A train track running alongside a large river. Up ahead, the track goes into a railroad tunnel. [This appears to be along the Columbia River in the Gorge.]
"Celilo Falls - Columbia River - circa 1930 - Prior to Bonneville Dam" [The Dalles Dam caused the most impact on Celilo Falls. Bonneville Dam impacted the Native American burial site on Memaloose Island.]
"Steam wheelers fighting current to enter Cascade Locks - Columbia River" "Steamboats in rapids approaching Cascade Locks, Columbia River Highway, Oregon"