An envelope containing commemorative photographs taken during the Vanport flood in 1948. The envelope is white with red lettering that reads, "10 Selected Snapshots 50C. Vanport City, Ore. Destroyed by the Mighty Columbia River. May 30, 1948." 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.