(CR1550E) E. of Goodfield, Woodford County, IL. IL117 N. 0.35 miles from jct with I74 exit 112 in Goodfield, E. on US150 1.7 miles, N. on CR1550E 0.1 miles to the tunnel. (N40 37.580 W89 14.509) Photo 10-10-09.