(Henderson Creek #2, 71') across Henderson Creek E. of Seaton, Ohio Grove Township, Mercer County, IL. 160th St. S. 0.75 miles from jct with 20th Av. E. of Seaton, E. on 15th Av. 5.1 miles, N. on 210th St. 0.75 miles to the bridge. (N41 04.926 W90 41.214) Photos 10-22-10.