(Dotson, 2002, IA-58-03) S. of Cotter, Columbus City Township, Louisa County, IA. W66 S. 2.4 miles from jct with IA92 in Cotter to the house on the E. side of the road at 13500 up a driveway 0.2 miles. (N41 15.415 W91 27.741) Photo 9-2-04.