(38' x 28', IA-38-04) SE of Grundy Center, Washington Township, Grundy County, IA. IA175 (Diagonal Rd.) SE 3.1 miles from jct with IA14 (4th St.) in Grundy Center, S. on Q Av. 1.5 miles to the crib on the E. side of the road at 25646. (N42 19.841 W92 42.518) Photo by Jack & June Schmidt 7-8-12.