(CN-Prairie School Rd.) under CN RR NE of Riverton, Williams Township, Sangamon County, IL. IL54 NE 2.9 miles from jct with Main St. on the N. side of Riverton, N. on Prairie School Rd. 50’ to the tunnel. (N39 53.252 W89 29.558) Photo by Jack & June Schmidt 9-4-19.