Need to start calling the city about that. They typically are not in to much of a hurry to reopen the landings. I would guess fishing opener might get them to reopen the public landings.
If you are looking for something close to 494 try Mississippi pub. Its just about a mile south of 494 on the same side of the river. Willies is open on the other side. These marinas have such nice landings I dont have any problem paying the $10 to launch at them. Willies even has video cameras on their parking lots.