An alternate detour is to go west on 42a mile or so and then south on Mt Pleasant Rd and around and back up 50. If/when Jackson King is reopened, you can go straight at the closure, to Mt Pleasant Rd and then around as well.
Jackson King was reopened late yesterday so you can go south at the closure, instead of north. Lot faster. Has DOT said why its closed still? Bridge/road integrity is my guess, but why so long for an inspection if they are reopening it (meaning no damage found).
So I went by yesterday long enough to get a good look. Part of the bank washed out. They had a digger and some trucks putting dirt down. This was about 4 yesterday. No idea if they did reopen at 530.
I went by at lunch today, they had a major construction operation going on. So my guess is they are completely either rebuilding part of the bridge or the road there. Be a few days is my guess.