Cook County Highway Dept. Benchmark - Thornton, IL
Posted by: adgorn
N 41° 33.398 W 087° 35.766
16T E 450291 N 4600723
Small disk in top of bridge on north side.
Waymark Code: WMD59E
Location: Illinois, United States
Date Posted: 11/20/2011
Views: 1
Located on Cottage Grove Avenue south of 183rd Street just outside of Sweet Woods Forest Preserves. Was walking over the bridge and noticed the disk. No specific numeric info is provided on it so perhaps it is not active.