(170th Street, 152', 1939) across South Skunk River NNE of Ames, Milford Township, Story County, IA. US69 N. 3.9 miles from jct with 30th St. on the N. side of Ames, E. on 170th St. 2.6 miles to the bridge. (N42 06.358 W93 34.235) Photo by Jack & June Schmidt 7-10-12.