(14-sided, IA-17-04) in Rockwell, Cerro Gordo County, IA. CR B60 E. 0.5 miles from jct with US65 in Rockwell, S. on 1st St. 0.35 miles, E. on Ella to the house at 16 Ella Ct. (6-19-02, N42° 58.502', W93° 11.457')