When the park was converted into the Jantzen Beach SuperCenter the seaplane base and airport were removed.
C. R. Zehtbaur, vice-president of the Jantzen Beach Amusement Park, announced in 1946 that his business had entered a long-term lease for a one-mile strip along the Columbia River.
The park graded a 3,000 by 300 foot runway and built hangars, a ramp, a salesroom and a clubhouse.
Gary Safley, who was a retired United States Naval Aviator, joined the seaport staff as the clubhouse flight instructor.
[2] In 1963, the Oregon Department of Aviation unanimously denied a proposal to expand the seaplane base into a combined airport on a man-made island on the Columbia River.