(MI-81-64) E. of Ann Arbor, Superior Township, Washtenaw County, MI. Plymouth Rd. E. 1.65 miles from jct with US23 exit 41 on the E. side of Ann Arbor, S. on Cherry Hill Rd. 0.95 miles, E. on Stonevalley Dr. 0.1 miles to the turret on the N. side of the road at 5539. (N42 17.944 W83 39.131) Photo by Mark & Gordie Comstock 5-15-21.