The Lanikai Pillbox trail on Kaiwa Ridge will be closed Sunday for site cleanup and debris removal.

The one-day closure comes a few weeks after about $248,000 in repairs to the two World War II observation stations, popularly known as the pillboxes, were completed in mid-August. The trail had been closed for 60 days and reopened Aug. 20.

Sunday’s closure is necessary for the removal of the leftover construction debris by helicopter, according to the state Department of Land and Natural Resources.