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| 380-399 | 400 | 401 | 402 | 403 | 404 | 405 | 406 | 407 | 408 | 409 | 420-478 | |||
| 410 | 411 | 412 | 413 | 414 | 415 | 416 | 417 | 418 | 419 | |||||
| Iowa 400 |
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Designated: 1958 (number assigned March 5, 1957) Decommissioned: August 1, 1980 (Madison County and the city of Truro took over their segments on September 15) Original western terminus: Truro Original eastern terminus: I-35 (exit #47) Counties: Madison, Warren Paving history: The entire road was gravel at first but paved by the time I-35 opened. Replaced by: West Street in Truro (it turned to the south before ending) and County Roads G68, R35, and G64 |
| Iowa 401 |
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Designated: November 9, 1958 (number assigned March 5, 1957) Decommissioned: March 12, 1991 Original northern terminus: Camp Dodge; it was truncated north of I-35/80 after the city of Johnston took over its share of the road on July 5, 1990. Original southern terminus: I-35/80 in Des Moines; it was extended to US 6 (the junction of Merle Hay Road and Douglas Avenue) along a former segment of IA 64 on November 17, 1960. Counties: Polk Paving history: The entire road was paved at the time of designation. Replaced by: City streets (NW Beaver Drive and Merle Hay Road) north of I-35/80; IA 28 south of there. This route followed IA 89 (I)'s original route; it was superseded by IA 141 in 1940 and designated as IA 401 when IA 141 was routed along a new road branching from I-35/80 that opened on the day that this Interstate segment opened. Former terminus photos |
| Iowa 402 |
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Proposed in the late 1950s but not signed — it never appeared on official state highway maps. According to Gary Stevenson, IA 402 "was supposed to be an expressway/freeway due south of Waterloo either to I-80 or down to Ottumwa. There was a big stink because the Highway Commission bought up land and did some grading and then decided to abandon the road. I think they wanted to turn it over to Black Hawk County but they said no thanks. This could be what is now Route 21 south of Waterloo." On September 26, 1956, the Des Moines Register published a story about the Commission's plan to build a freeway from Waterloo to Ottumwa to give those cities four-lane links to the proposed I-80. The Commission assigned the IA 402 number to the proposed segment between Waterloo and IA 8 near Dysart on April 2, 1957. Plans for a freeway were abandoned in 1961 after a change in Highway Commission membership felt that a freeway was not necessary — even though $2.7 million had already been spent on right-of-way, grading, bridges, and culverts for the 19-mile segment between Waterloo and Dysart (according to the Register on June 23, 1969). The road was graveled for local traffic to use. A 1965 Conoco/H.M. Gousha map of Iowa showed this segment of IA 402 as under construction with a "late 1965" projected completion date. Although deemed unnecessary by many — including the Highway Commission membership at the time — with the presence of US 63 and US 218 in the area, the Commission proceeded with plans to pave the road in 1967. IA 402 became an extension of IA 21 on January 1, 1969, as a result of the Great Renumbering; the two-lane road was completed on August 11, 1969, at a total cost of $4.5 million. For more on IA 402, including maps of the proposed route and a link to a fictional exit list, see Jeff Morrison's page. There is even an online legal description for the route in Black Hawk County. |
| Iowa 403 (I) |
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Designated: October 19, 1958 (number assigned in 1957) Decommissioned: July 1, 1980 Original northern terminus: US 20 on the Woodbury/Ida county line Original southern terminus: Cushing Counties: Woodbury Paving history: The entire road was paved at the time of designation. Replaced by: County Road L43. This was created after US 20 was rerouted to the north of Cushing. |
| Iowa 403 (II) |
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Designated: July 1, 1980 Decommissioned: July 1, 2003 Original northwestern terminus: South Dakota state line (Big Sioux River); continuation of SD 48 Original southeastern terminus: IA 12 in Akron Counties: Plymouth Paving history: The entire road was paved at the time of designation. Replaced by: Local road; however, Akron's city council refused to accept it as of December 2003. It was the only jurisdiction that did not accept any of the July 1 road transfers. Akron agreed to do "minimal" snow removal on the road during the winter of 2003-04. In the spring of 2005, the city was holding a "Name That Highway" contest, implying that the city had accepted jurisdiction by then. The road was named "Big Sioux River Road" by the beginning of 2006. Terminus photos |
| Iowa 404 (I) |
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Designated: September 1960 (number assigned September 4, 1957) Decommissioned: July 1, 2003 Original western terminus: US 61 Original eastern terminus: Montrose Counties: Lee Paving history: The entire road was paved at the time of designation. Replaced by: County Road J72; this replaced a former segment of US 61. Terminus photos |
| Iowa 404 (II) |
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This unsigned designation has been given to bypassed segments of US 75 and IA 60 in Plymouth, Sioux, O'Brien, and Osceola counties:
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| Iowa 405 |
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Designated: 1958 (number assigned September 4, 1957) Decommissioned: July 1, 2003 Original northern terminus: IA 22 Original southern terminus: Lone Tree; it was truncated at the north city limits on October 1, 1980. Counties: Johnson Paving history: Unpaved at designation, the road was upgraded from bituminous to paved in 1975. Replaced by: County Road X14. Before its decommissioning it was the shortest posted route in Iowa (0.2 miles). It was originally part of IA 22. Terminus photos |
| Iowa 406 |
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Designated: October 4, 1957 Decommissioned: July 1, 2003 Original western terminus: US 34 in West Burlington Original eastern terminus: US 61 in Burlington Counties: Des Moines Paving history: The entire road was paved at the time of designation. Major alignment changes: On December 31, 1976, the east end of IA 406 was moved northward along Gear Avenue to end at the interchange with the newly-completed US 34 freeway. That segment was turned over to local control on February 1, 1981, as IA 406 ended at the intersection of Gear and Agency Avenues from then until its decommissioning. Replaced by: Local roads (Agency Street in both West Burlington and Burlington). This replaced IA 80 upon the designation of I-80. Terminus photos For maps of this road, see Jeff Morrison's Burlington Highway Chronology page. |
| Iowa 407 |
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Designated: 1957 Decommissioned: 1967 Original northern terminus: Oakville Original southern terminus: IA 99 Counties: Louisa Paving history: The entire road was paved at the time of designation. Replaced by: City streets; it replaced IA 7 (II). |
| Iowa 408 |
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Designated: November 26, 1957 Decommissioned: July 15, 1980 (the city of Lu Verne took over its piece on July 18) Original western terminus: US 169 Original eastern terminus: Lu Verne Counties: Humboldt, Kossuth (most of the road straddled the county line) Paving history: The entire road was paved at the time of designation. Replaced by: County Roads C12 and P60, plus Smart Street in Lu Verne |
| Iowa 409 |
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Designated: 1957 Decommissioned: January 24, 1968 Original northern terminus: US 18 Original southern terminus: Garner Counties: Hancock Paving history: The entire road was paved at the time of designation. Replaced by: City street (State Street in Garner); it replaced IA 35 (II) upon the designation of I-35. |
| Iowa 410 |
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Designated: March 12, 1958 (number assigned October 4, 1957) Decommissioned: July 1, 2003 Original southwestern terminus: Backbone State Park (on the Delaware/Clayton county line) Original northeastern terminus: IA 3/13 south of Strawberry Point Counties: Clayton Paving history: Unpaved at designation, it was upgraded from bituminous to paved in 1996. Replaced by: County Road W68; this replaced the former IA 19 (II). Terminus photos |
| Iowa 411 |
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Designated: November 26, 1957 Decommissioned: 1965 Original northern terminus: Present-day County Road F15 north of Marengo Original southern terminus: North city limits of Marengo; it was extended southward to US 6 in 1960. Counties: Iowa Paving history: The entire road was paved at the time of designation. Replaced by: County road (now numbered V66). The road existed because the state built a new bridge across the Iowa River. It became the unmarked IA 975 in 1965, one year before the segment in Marengo was given back to the city. The segment north of Marengo was given to Iowa County on August 10, 1976. |
| Iowa 412 |
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Designated: September 1960 Decommissioned: October 1, 1983 Original western terminus: US 63 in Waterloo Original eastern terminus: US 218 in Waterloo Counties: Black Hawk Paving history: The entire road was paved at the time of designation. Replaced by: City street (San Marnan Drive); the segment between US 63 and 4th Street was removed to make room for the US 20 freeway. Note: The IA 412 number first appeared in Highway Commission notes on July 22, 1958, as the working number for a relocation of US 20 that was ultimately scrapped. Part of the relocated US 20 would have followed San Marnan Drive. Former terminus photos For maps of the route, see Jeff Morrison's Waterloo/Cedar Falls Highway Chronology page. |
| Iowa 413 |
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Designated: November 18, 1960 Decommissioned: July 22, 1980 Original northern terminus: IA 320 west of Badger; it was truncated at the Fort Dodge Airport at the same time IA 320 was decommissioned. Original southern terminus: US 20 in downtown Fort Dodge Counties: Webster Paving history: The entire road was paved at the time of designation. Replaced by: County Road P56; it replaced a segment of US 169. It followed 15th Street in Fort Dodge. For a map of its street alignment in Fort Dodge, see Jeff Morrison's Fort Dodge Highway Chronology page. |
| Iowa 414 |
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Designated: July 1958 Decommissioned: July 19, 1972 Original western terminus: US 6 north of Lewis Original eastern terminus: US 71 Counties: Cass Paving history: The entire road was paved at the time of designation. Replaced by: County Road G43. It replaced the short-lived IA 100 (II), which was originally a five-mile segment of IA 92, after about a month. |
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Iowa 415 |
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Length: 17 miles/27 kilometers Northwestern terminus: IA 141 (exit #148) outside of Johnston Southeastern terminus: US 6 (Euclid Avenue) in Des Moines Terminus photos Counties: Polk Cities along route: Johnston, Polk City, Ankeny, Des Moines NHS: From 1st Street in Ankeny to the south end at US 6 in Des Moines |
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| History | |
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Designated: June 13, 1959 (number assigned November 19, 1958), along a dislocated segment of IA 60 (I) between Des Moines and Polk City. It follows 2nd Avenue in Des Moines. Paving history: The entire road was paved at the time of designation. Major alignment changes: |
| Iowa 416 |
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Designated: October 21, 1959 Decommissioned: 1968 Original western terminus: IA 136 at Dyersville (with a break between the US 20 junction southeast of Dyersville and Farley) Original eastern terminus: US 20 west of Dubuque Counties: Dubuque Paving history: The entire road was paved at the time of designation. Major alignment changes: On December 14, 1960, IA 416 was truncated west of Centralia. The segments through Farley and Dyersville were renumbered as IA 418 and IA 420 respectively, while other segments were turned over to Dubuque County. Replaced by: County road (unnumbered, locally known as Old Highway Road). Although IA 416's last appearance on a state map was in 1968, the segment east of Centralia was maintained as unsigned IA 966 until October 23, 1995; the segment in Centralia lasted until January 12, 1996. IA 416 was part of US 20 until a new segment of US 20 opened between Dyersville and Dubuque. |
| Iowa 417 |
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Designated: December 14, 1960 Decommissioned: October 16, 1968 Original western terminus: US 67 in Riverdale Original eastern terminus: US 67 west of Le Claire Counties: Scott Paving history: The entire road was paved at the time of designation. Replaced by: County road (unnumbered, locally known as Valley Drive). After the state transferred part of the road to the city of Bettendorf on October 16, 1968, the remaining segment was designated as unsigned IA 984 until June 7, 1982. IA 417 was a former segment of US 67 that was bypassed after US 67 was moved to a new road closer to the Mississippi in 1959. Note: Rand McNally maps from the early 1960s referred to this road as Alternate US 67 instead of IA 417. However, I have not seen any other sources that would verify this designation. Also, Jeff Morrison discovered that the bypassed segment of IA 297 in Black Hawk County was labeled as IA 417 on a map that appeared in the Highway Commission's meeting minutes on November 2, 1960. This never appeared on any official state highway maps, however. For maps of this route, see the Highways of Davenport and Bettendorf page. |
| Iowa 418 |
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Designated: December 14, 1960 Decommissioned: December 18, 1968 Original northern terminus: Farley Original southern terminus: US 20 in western Dubuque County Counties: Dubuque Paving history: The entire road was paved at the time of designation. Replaced by: County Road Y13; it replaced a segment of US 20 that carried the IA 416 designation for a year after US 20 was relocated. A very small segment of old IA 418 outside of the Farley city limits — roughly 200 feet long — continued to be maintained by the state as unsigned IA 967 until July 1, 2003. |
| Iowa 419 |
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Designated: 1962 (number approved April 12, 1961) Decommissioned: July 1, 2003 Original northern terminus: US 6/IA 21 Original southern terminus: Victor Counties: Poweshiek, Iowa (the entire road straddled the county line) Paving history: The entire road was paved at the time of designation. Replaced by: County Road V36; this replaced a dislocated segment of IA 21. Terminus photos |