Overhead lifts have safety switches that are sensitive to side‐to‐side movement of the chairs or cars carrying skiers. If the lateral movement is too great, the safety switch cuts in and stops the lift.

Has anyone died on a chairlift?

The last person killed on a ski lift in Colorado was 40-year-old Kelly Huber, who fell from a lift with her two daughters after their chair hit a tower at Ski Granby Ranch in 2016. Before that, a manager at Winter Park Ski Resort died in 2002 after suffering seizure-like symptoms and falling from a lift.

How long does a ski lift last?

If you figure the average detachable is replaced at 23.8 years as mentioned above, the peak year for replacement of these machines will be in 2022. Even if only half of the detach quads built in 1998 are replaced in 2022, that's a huge 16 new detachables.