(Gorilla) at Niabi Zoo NE of Coal Valley, Coal Valley Township, Rock Island County, IL. US6 E. 2.7 miles from jct with I74 exit 5 NW of Coal Valley, S. (curves E.) on Niabi Zoo Rd. 1.0 miles to the zoo on the S. side of the road. Gorilla is just inside the zoo to the right. Admission. (6-29-09, N41 26.632 W90 26.062) Photo by Mark & Gordie Comstock & Larry Baker.