(Martinton Ditch #3, 57', 1955) across Martinton Ditch #3 E. of Martinton, Martinton Township, Iroquois County, IL. 2800N Rd. E. 3.0 miles from jct with IL1 on the NW side of Martinton, S. on 2400E Rd. 0.5 miles to the bridge. (N40 54.777 W87 40.411) Photos 5-28-10.