A large water main break is causing a mess near Gravois Bluffs in Fenton.

Photos from the the scene at Gravois and Highway 141 show nearby parking lots and streets are absolutely swamped.

All the businesses are open, but one lane of old 141 has been shut down.

Missouri American Water said they do not know what caused the break, or how long it will take to fix, but they are working on the problem.