There is a range there, and it has been there a long time. From what I understand, though, it is reopening after being closed for a while. It is an outdoor range, looks like there are firing positions for a few hundred yards (unsure exact distance).
I just looked it up on Infospace, and it shows up as:
St. Louis Missouri Bottom Range
Missouri Bottom Road
Bridgeton, MO 63044
314-739-3006
I haven't been out there, but I have been by there.