(Collinsville / Arch) in Collinsville, Madison County, IL. IL157 (Bluff Rd.) N. 0.4 miles from jct with I55 exit 11, E. on Belt Line Rd. 1.2 miles to the tower on the S. side of the road. (N38 41.397 W89 59.354) Photos by Jack Schmidt 5-6-09.