(Cook’s, 41', 1986, 13-16-e) across Natalie Creek in Oak Forest, Cook County, IL. IL50 (Cicero Av.) N. 1.1 miles from jct with US6 in Oak Forest to the bridge on the W. side of the road at 15048. (N41 37.101 W87 44.242) Photo 3-15-04.