Lawrence & Houseworth's Gems of California - South Yuba River and Canyon. Built around 1960, Interstate 80 needed lots of space. At this spot below Cisco, there happened to be a bend in the river right where eastbound I-80 needed to be. The riverbed was shifted north, straightened out and placed between the east and westbound lanes.
Photo location 39° 18.881'N 120° 33.342'W