A slip has closed the Durie Hill Elevator.
Debris from it spilled across the pathway at the opening of the elevator's entrance tunnel last week.
Engineers have been on site to assess the situation, a Whanganui District Council spokesperson said, and it is possible that more earth will fall.
"In the meantime, to keep everyone safe the elevator will be closed while we work on a fix."
The elevator's operator Anthonie Tonnon from Whanganui Connection said he hoped it would reopen soon.