The Lightship Columbia, the largest exhibit at the Columbia River Maritime Museum, will temporarily close to visitors starting on Tuesday.

The ship will be towed to Portland on Oct. 8, where it will be inspected, cleaned and repaired. In addition, the engine room and several below-deck areas, which have been closed to the public since 1979, will be restored and turned into new exhibit spaces.

The Lightship Columbia is expected to return to the Astoria museum in early 2022.