(Lewis & Clark) on the Lewis & Clark Confluence Tower S. of Hartford, Chouteau Township, Madison County, IL. IL3 S. 1.0 miles from jct with 7th St. in Hartford, W. on Piasa Ln. 0.1 miles, S. on Confluence Tower Dr. 0.15 miles to the tower. (N38 48.655 W90 06.036) Photos by Jack & June Schmidt 4-6-14.