US 61 has been slightly rerouted near Scott City, MO. Just south of Kelso, US 61 turns east and connects with I-55 at a newly constructed interchange (exit 87, I think). The exit and new stretch of US 61 are open. I drove them on 11/9/2019. I should have taken pictures, but I didn't realize this was new construction/routing until I returned home.
The prior alignment of US61 north of MO route PP is now signed as Business US 61 all the way to exit 89 on I-55.
Looks like this will require changes to US61 and I-55 as well as the creation of a new US61 Business route.
Attached is the best evidence I can find showing the new construction.