(40' x 20', IA-08-03) N. of Boone, Dodge Township, Boone County, IA. P Av. N. 6.9 miles from jct with 190th St. on the NE side of Boone to the crib on the W. side of the road at 218. (N42 10.696 W93 52.504) Photo by Jack & June Schmidt 7-11-12.