When does Mt. Nebo Scenic byway close?

A question for those who live around Nephi, when does the Mt. Nebo Scenic byway gate close? My wife and I are gonna hit maple next wednesday (21st) weather permitting and then I was hoping to take the byway back. Anyone know the exact date they close the gate?
Tried looking it up on the .gov site but I couldn't find it.

It's often weather pending. If no snow...it's open, but the upper tier and summit isn't ploughed, so if snow comes and it doesn't melt off, that's when they pad lock the gate.