In 1948 , the Vanport flood submerged Oaks Park for thirty days , killing a third of the bluff 's oak trees , warping most of the rides , and resulting in damage to the rink that took five months to repair ; the next year , Bollinger 's son Robert took over after his father 's death . The damage prompted the owners to rebuild the rink floor on airtight iron barrels , which would float in the event of another flood ; the floats worked as planned during the area 's Christmas flood of 1964 and the Willamette Valley Flood of 1996
Christmas flood of 1964
Christmas flood of 1964
Oaks Amusement Park