An aerial photograph of flood waters during the Vanport flood. The interstate bridge and a railroad bridge are visible in the distance. Vanport City, once the second largest city in Oregon, was destroyed by a flood on May 30, 1948 when water breached a nearby section of the dike along the Columbia River. This photograph was part of a series of selected snapshots of "Vanport City, Ore. Destroyed by the Mighty Columbia River," sold as a set after the flood.