(MI-81-57) N. of Ypsilanti, Superior Township, Washtenaw County, MI. Ridge Rd. N. 1.15 miles from jct with Bus.US12 (Michigan Av.) on the E. side of Ypsilanti to the bldg on the E. side of the road at 1790 behind the bldgs. (N42 16.174 W83 33.172) Photos by Mark & Gordie Comstock & Dionis & Nevaeh Forrest 11-20-20.