(Delavan / CAT) at Caterpillar SW of Delavan, Delavan Township, Tazewell County, IL. IL122 W. 1.0 miles from jct with Locust St. in Delavan, S. on 1900E (Caterpillar Rd.) 1.3 miles to the tower on the E. side of the road. (N40 21.194 W89 33.957) Photos 5-5-09.