(MI-81-163) NW of Ann Arbor, Ann Arbor Township, Washtenaw County, MI. Huron River Dr. NW 2.4 miles from jct with MI14 on the NW side of Ann Arbor, N. on Maple Rd. 0.15 miles, continue N. (curves E.) on Country Club Dr.0.4 miles, S. on Windshadow Dr. 0.15 miles, veer left & continue S. 0.1 miles to the turret. Ask permission. (N42 19.148 W83 46.520) Photo by Mark Comstock 3-11-25.