One of the lifts on Whistler mountain remains closed after a single chair on the Harmony Express chairlift tumbled to the ground late Wednesday night in what resort officials are calling an isolated incident.

Even though no-one was hurt, the incident is garnering attention because Whistler is one of the venues for the 2010 Winter Olympics.

Intrawest, the company the owns the resort, says a problem was discovered on the lift during routine maintenance Wednesday night and the fallen chair was spotted the following morning.

The lift was shut down Thursday and Friday and an investigation involving the B.C. Safety Authority and lift manufacturer Leitner-Poma of America found that a mounting bolt had failed.

Intrawest says all similar bolts have been replaced and all parties involved are satisfied the problem has been remedied. As a result, the Harmony Express lift could reopen as early as Sunday.

In December, 13 people suffered minor injuries when several cars on Whistler Blackcomb's Excalibur gondola fell to the ground.

Fifty-three people had to be evacuated from the lift after an unexpected build-up of ice - known as ice-jacking - caused a tower's partial collapse.

With a report by Sarah Galashan and The Canadian Press