90 and Iowa 8. In March 1932, Iowa 58 extended east to Iowa Highway 137 (then Iowa Highway 59), replacing Iowa 90. In August 1932, Iowa 58 was truncated wes to Grundy Center, as Iowa Highway 57 replaced the section west of Grundy Center. In 1935, Iowa 58 extended north towards Hudson. It headed along Hudson Road and ended at US 20 on the northern edge of Cedar Falls. As a result of the highway renumbering in 1969, Iowa 58 was truncated at US 63 in Hudson, and Iowa 175 replaced the section west of Hudson (along with the section of Iowa 57 that was formerly part of Iowa 58). In the 1980s, US 20 was rerouted onto a freeway south of Cedar Falls and Waterloo. By 1989, Iowa 58's north end had been truncated to the new freeway. In the early 1990s, the freeway which Iowa 58 now shares with Iowa 27 was constructed. By 1996, it had been extended and routed onto the new Avenue of the Saints freeway, giving it its current length. The Iowa 27 designation was extended over the entire Avenue of the Saints highway in 2001. Major intersections References 058 Transportation in Black Hawk County, Iowa