(Replica, 13' x 5', 13-29-a) across a ditch in Duncan Mills (S. of Lewistown), Isabel Township, Fulton County, IL. US24 S. 4.5 miles from jct with US24 (W Av.) in Lewistown, W. on Duncan Mills St. 200’ to the bridge on the N. side of the road. (11-4-09, N40 20.428 W90 11.427)