(40', 1987, IA-52-19) N. of Iowa City, Penn Township, Johnson County, IA. Dubuque St. N. 2.3 miles from jct with I80 exit 244, E. (curves S.) on Stewart Rd. 0.15 miles to the house on the W. side of the road at 3923. (N41 42.891 W91 32.966) Photo by Jack & June Schmidt 6-20-12.