Appears that Shannon Creek branch will be largely closed this summer due to powerline construction: https://www.seatoskygondola.com/blog/power-line-project/

We weren't let up on a Friday at 7:30am. The employee indicated they would be working 6 days a week (every day except Sunday). Was not able to get the time of the closures but I imagine you could get in on a weekday if you went really early. Not sure how accurate the information is as it was an EGP worker enforcing the closure, not an actual sea to sky gondola representative