(Old Gas Station - Texaco) N. of Rockwell City, Twin Lakes Township, Calhoun County, IA. US20 N. 3.5 miles from jct with Bus.US20 W. of Rockwell City, continue N. on IA4 1.7 miles, E. on IA124 (220th St.) 1.4 miles to the bldg on the S. side of the road. (N42 28.233 W94 38.710) Photos by Brion Hase 8-22-12.