Iowa Highways: 400 to 478

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380-399 400 401 402 403 404 405 406 407 408 409 410 411 412 The 900 Series
413 414 415 416 417 418 419 420 421 422 424 426 428
  431 432 434 437 438 450 460 461 463 475 478  
For an explanation of the route listings, click here.

Iowa 400
Designated: 1958 (number assigned March 5, 1957) Decommissioned: 1980
Original western terminus: Truro
Original eastern terminus: I-35 (exit #47) in western Warren County
Paving history: The entire road was gravel at first but paved by the time I-35 opened.
Replaced by: County Roads G68, R35, and G64
Iowa 401
Designated: November 9, 1958 (number assigned March 5, 1957) Decommissioned: July 1, 1990
Original northern terminus: Camp Dodge
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.
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This route followed IA 89 (I)'s original route; it was superseded by IA 141 in 1940 and designated as IA 401 when IA 141 was routed along a new road branching from I-35/80 that opened on the day that this Interstate segment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
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 in July 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.
Iowa 403 (I)
Designated: October 19, 1958 (number assigned in 1957) Decommissioned: 1980
Original northern terminus: US 20 on the Woodbury/Ida county line
Original southern terminus: Cushing
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)
Designated: 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
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", according to the DOT's map of Akron, by the beginning of 2006.
Terminus photos
Iowa 404 (I)
Designated: September 1960 (number assigned September 4, 1957) Decommissioned: July 1, 2003
Original western terminus: US 61 in central Lee County
Original eastern terminus: Montrose
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)
This designation was originally given to the former segment of IA 60 in Alton (between IA 10 and the south city limits) that was bypassed on September 16, 2004. It was turned over to the city by the end of 2005. The designation was later assigned to bypassed IA 60 segments through Seney, Sheldon, Ashton, and Sibley as well as part of the former US 75 in Le Mars. The Ashton segment was turned over to local control by the end of 2006. The Seney and Sheldon segments were turned over to local control by the end of 2007 and the Sibley segment was turned over by the end of 2008. (The Sibley segment is marked as IA 404 in the 2010 Rand McNally Road Atlas.) The only segment of IA 404 that is still under state control as of the beginning of 2009 is the former US 75 segment between the US 75/IA 60 interchange and IA 3 in Le Mars; that segment is signed as part of Business US 75.
Iowa 405
Designated: 1958 (number assigned September 4, 1957) Decommissioned: July 1, 2003
Original northern terminus: IA 22 in southeastern Johnson County
Original southern terminus: Lone Tree; it was truncated at the north city limits in 1980
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
Designated: 1957 Decommissioned: July 1, 2003
Original western terminus: US 34 in West Burlington
Original eastern terminus: US 61 in Burlington
Paving history: The entire road was paved at the time of designation.
Major alignment changes: In 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 in 1981, as IA 406 ended at the intersection of Gear and Agency Avenues from 1981 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
Iowa 407
Designated: 1957 Decommissioned: 1967
Original northern terminus: Oakville
Original southern terminus: IA 99 in southeastern Louisa County
Paving history: The entire road was paved at the time of designation.
Replaced by: City streets; it replaced IA 7 (II).
Iowa 408
Designated: November 26, 1957 Decommissioned: May 2, 1980
Original western terminus: US 169 on the Humboldt/Kossuth county line
Original eastern terminus: Lu Verne
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
Designated: 1957 Decommissioned: 1968
Original northern terminus: US 18 in eastern Hancock County
Original southern terminus: Garner
Paving history: The entire road was paved at the time of designation.
Replaced by: City streets; it replaced IA 35 (II) upon the designation of I-35.
Iowa 410
Designated: 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
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
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.
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 in 1976.
Iowa 412
Designated: 1960 Decommissioned: 1983
Original western terminus: US 63 in Waterloo
Original eastern terminus: US 218 in Waterloo
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
Designated: November 18, 1960 Decommissioned: 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
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
Designated: July 1958 Decommissioned: July 1972
Original western terminus: US 6 north of Lewis
Original eastern terminus: US 71 in central Cass County
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.
Iowa 415
Length: 17 miles/27 kilometers
Northwestern terminus: IA 141 (exit #148) southeast of Granger
Southeastern terminus: US 6 (Euclid Avenue) in Des Moines
Terminus photos

Counties: Polk
Cities along route: Polk City, Ankeny, Des Moines
History
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.
Alignment changes:
  • 1980: Extended northwestward from Polk City to IA 17 south of Madrid along the former County Road R2F.
  • August 2003: Realigned to follow Bridge Road and the new NW Saylorville Drive from Polk City to a new interchange with IA 141 (creating a situation where southbound IA 415 actually goes northeastward, and vice versa). The old segment between IA 17 and Polk City was turned over to Polk County.
  • Iowa 416
    Designated: October 21, 1959 Decommissioned: 1980
    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
    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). The segment east of Centralia was maintained as unsigned IA 966 between 1980 and 1995; the segment in Centralia lasted until 1996.
    IA 416 was part of US 20 until a new segment of US 20 opened between Dyersville and Dubuque.
    Iowa 417
    Designated: December 14, 1960 Decommissioned: 1969
    Original western terminus: US 67 in Riverdale
    Original eastern terminus: US 67 west of Le Claire
    Paving history: The entire road was paved at the time of designation.
    Replaced by: County road (unnumbered, locally known as Valley Drive). It replaced part of US 67, after it was moved to a new road closer to the Mississippi.
    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
    Designated: December 14, 1960 Decommissioned: 1968
    Original northern terminus: Farley
    Original southern terminus: US 20 in western Dubuque County
    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.
    Iowa 419
    Designated: 1962 Decommissioned: July 1, 2003
    Original northern terminus: US 6/IA 21 on the Poweshiek/Iowa county line
    Original southern terminus: Victor
    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. The entire road straddled the Poweshiek/Iowa county line.
    Terminus photos
    Iowa 420
    Designated: December 14, 1960 Decommissioned: 1968
    Original northwestern terminus: IA 136 in Dyersville
    Original southeastern terminus: US 20 southwest of Dyersville
    Paving history: The entire road was paved at the time of designation.
    Replaced by: Unsigned IA 968 before 1989; now a local road. This was also a former segment of US 20 that carried the IA 416 designation for a year after US 20 was relocated.
    Iowa 421
    Designated: 2000 Decommissioned: February 18, 2003
    This unsigned highway was originally designated to two former segments of US 61 northeast of Muscatine, totaling 0.7 miles, that were displaced by the opening of a nearby four-lane segment in 2000. A map showing the original two segments can be found on Jeff Morrison's Super Secret Route Page. In 2001 a third segment (roughly two miles) between Zachary Avenue in eastern Muscatine County and the east end of the Blue Grass bypass in Scott County was added to the mileage of IA 421 upon the opening of the bypass. Muscatine County approved the transfer of its segments on December 23, 2002; the DOT followed suit on February 18, 2003. The segment within Blue Grass was turned over at a DOT meeting on January 14, 2003.
    Iowa 422
    Designated: August 11, 1964 Decommissioned: 1979
    Original northern terminus: US 169 in central Kossuth County
    Original southern terminus: Burt
    Paving history: The entire road was paved at the time of designation.
    Replaced by: Unsigned IA 969; on May 2, 1980, Kossuth County agreed to take the highway, which is now County Road B19. It was created after a minor shift in US 169's alignment moved the road away from Burt.
    Note: The Highway Commission originally assigned the IA 422 number to a former US 18 segment in Rudd that was bypassed in 1959, but the designation was scratched from the Commission's meeting minutes from December 12, 1960.
    Iowa 424 (I)
    Designated: November 1961 (number assigned December 14, 1960) Decommissioned: 1980
    Original southwestern terminus: (former) IA 111 in Britt; it was truncated west of Britt's east city limits in 1969
    Original northeastern terminus: US 18 east of Britt
    Paving history: The entire road was paved at the time of designation.
    Replaced by: City streets; this route replaced a two-mile segment of US 18. IA 424 disappeared from state highway maps after 1969 so it is unknown if the 0.44-mile segment outside of Britt was signed after that given its short length.
    Iowa 424 (II)
    Designated: 1999 Decommissioned: July 1, 2003
    Northern terminus: US 218/IA 27 north of Olds
    Southern terminus: US 218/IA 27 south of Swedesburg (with a 1½-mile break along the segment that is still part of IA 78, which was not moved when US 218 was)
    Paving history: The entire road was paved at the time of designation.
    Replaced by: County Road W60 (although it may not be signed as such; the E-911 name is James Avenue)
    Terminus photos
    This unposted road was a former segment of US 218 that was superseded by a four-lane Avenue of the Saints segment.
    Iowa 426
    Designated: December 14, 1960 Decommissioned: 1980
    Original western terminus: IA 92 in eastern Keokuk County
    Original eastern terminus: Rose Hill
    Paving history: The entire road was paved at the time of designation.
    Replaced by: Local road in Rose Hill; the segment between IA 92 and the west city limits was eventually removed. The segment in Rose Hill remained under state control until 1981. IA 426 was a replacement for a dislocated segment of IA 92 that was bypassed three months prior to the designation.
    Iowa 428 (I)
    Designated: November 1965 Decommissioned: 1980
    Original western terminus: Anamosa
    Original eastern terminus: The junction of US 151 and IA 64 east of Anamosa
    Paving history: The entire road was paved at the time of designation.
    Replaced by: County Road E28; it was a former segment of IA 64 which was truncated after US 151 was re-routed around Anamosa.
    Iowa 428 (II)
    Designated: 1980 Decommissioned: July 1, 2003
    Original northwestern terminus: Maquoketa Caves State Park
    Original southeastern terminus: US 61 north of Maquoketa
    Paving history: The entire road was paved at the time of designation.
    Replaced by: County Road Y31, plus a short unnumbered spur road leading into Maquoketa Caves State Park. Before 1964 this was IA 130 (III).
    Terminus photos
    Iowa 431 (I)
    Designated: December 2, 1998 Decommissioned: 2001
    Original northern terminus: US 218/IA 27 northwest of Waverly
    Original southern terminus: IA 3 in Waverly
    Paving history: The entire road was paved at the time of designation.
    This unsigned number was designated to a 1.9-mile segment of US 218 after the bypass was completed; it was, and still is, signed as part of Business US 218.
    Iowa 431 (II)
    This designation was given to the former segment of US 30 through Le Grand that was bypassed in late 2004. The segment through Le Grand was turned over in 2006 after rehabilitation work was completed, but the DOT's map of Marshall County and the Wisconsin Numbering State Trunk Highways survey still shows it as an active highway outside of Le Grand. IA 431 exists in two segments, as the former US 30 bridge over the Union Pacific railroad tracks has been removed.
    Iowa 432
    Designated: June 24, 1998 Decommissioned: May 2003
    Original northern terminus: IA 163 in central Mahaska County
    Original southern terminus: IA 92 in Oskaloosa
    Paving history: The entire road was paved at the time of designation.
    This was used for an unposted former segment of IA 163 that was displaced when the bypass of Oskaloosa opened; in December 2002 the Mahaska County Board of Supervisors agreed to take over jurisdiction of the road from the state, and the DOT approved the transfer on January 18, 2003. This number was assigned to it rather than a number in the 900 series (which are ordinarily used in situations like this), and the state highway maps from 2001 to 2003 show it, but the highway was never signed. Even the overhead green signs at the junction of IA 92, which used to indicate the eastern terminus of IA 163, were blank until they were taken down.
    Former terminus photos
    Iowa 434
    This designation was given to the former segment of US 34 from Danville through Middletown to West Burlington that was bypassed when a new four-lane segment opened in November 2005. While it appeared as a black line on the 2004 state transportation map, all segments outside of Danville appeared as a county road labeled "DMC HWY 34" on the Des Moines County map dated January 1, 2007. Danville accepted jurisdiction of its portion of the road on May 8, 2008.
    Iowa 437
    This was a former segment of IA 137 in Eddyville that was abandoned when IA 137 was realigned to connect with the US 63 bypass in 2005. The road is listed in Wisconsin's Numbering State Trunk Highways survey in 2008 and was previously shown as a red line without a marker on the DOT's Eddyville map, but as of mid-2010 the red line has disappeared from the Eddyville map. The road dead-ends in both directions.
    Iowa 438
    This number was originally given to an unsigned bypassed segment of US 218 (Grand Avenue in Mount Pleasant), dating back from the opening of the Avenue of the Saints bypass in December 2001. It originally ran southward from US 34, dead-ending south of 255th Street; the segment north of what was then US 34 still carried southbound US 218 traffic. In March 2002, after US 218 was fully re-routed onto the bypass, the IA 438 designation was extended northward to the interchange with US 218/IA 27 north of Mount Pleasant. Although the Mount Pleasant City Council passed a resolution to agree to take over the road (as well as US 34 when the north bypass was completed) on June 11, 2003, the segment south of then-US 34 was not turned over until August 12, 2004. The segment between the US 34 bypass and the old US 34 was turned over by the end of 2005, as the Iowa DOT's map of Mount Pleasant (link is to a PDF-format file) shows that the only remaining segment is a short piece of less than ½ mile that connects the southbound US 218/IA 27 off-ramps and the US 34 bypass at an interchange north of the city.
    (A side note: The unsigned road that exited from northbound US 218/IA 27 at the north bypass interchange and ends at IA 438 was designated as IA 534 before the rest of the US 34 north bypass was completed.)
    Terminus photos
    Iowa 450
    This is an unsigned, 0.28-mile connecting highway between IA 10 and the interchange with IA 60 in Sioux County north of Alton, following 450th Street (hence the number), that the state took over as of January 31, 2005. This highway does not appear on any maps (here is a link to the Alton map to reference), but it was listed on the Wisconsin DOT's 2008 Numbering State Trunk Highways document.
    Iowa 460
    This unsigned highway was assigned to two former segments of US 218 and IA 394, totaling about 5½ miles, after the bypasses of Donnellson and Argyle in Lee County opened in 2004. One segment ran from County Road J56 through Donnellson to County Road J62, while the other ran through Argyle. The segment through Donnellson was given to local jurisdictions by the end of 2005; the segment through Argyle appeared on the 2007 state transportation map as a black line but it did not appear on the Lee County map dated January 1, 2007. Both segments are known as 180th Avenue in Lee County.
    Iowa 461
    Length: 11 miles/18 kilometers
    Northern terminus: I-80 exit #295 in Davenport
    Southern terminus: I-280 exit #6 in Davenport
    This is the official designation of Business US 61 in Davenport, which was created when US 61 was rerouted onto I-80 and I-280 in September 2011. From I-80, the route follows Brady Street, the one-way pair of Welcome Way/Harrison Street (southbound) and Brady Street (northbound), and River Drive. The segment along River Drive, which includes a short multiplex with US 67, follows the Great River Road east of IA 22.
    Iowa 463
    This designation was given to a former segment of US 63 in Bremer County northwest of Frederika that was bypassed by a new four-lane segment in late 2009. It was turned over to Bremer County by the end of 2010, after the road was resurfaced.
    Iowa 475
    From 1968 to 1975, this was the designation for 32 miles of old US 75 between Sioux City and Onawa (after US 75 was routed onto I-29). I am not sure if this was signed or not — it did not appear on any official state highway maps, but the Iowa Primary Road Sufficiency Logs and Rand McNally maps from this era both showed this route. In 1975 it became the "secret" (unsigned) IA 970. Monona County's segment was turned over in 1980, and the segments within Salix, Sloan, and Whiting were turned over in 1983; Sergeant Bluff followed suit in 1994. The rest of Woodbury County's share was decommissioned in 1996 and the entire road south of Sergeant Bluff is now signed as County Road K45. (A small segment of less than 200 feet south of Singing Hills Boulevard in Sioux City was still considered part of IA 970 until July 1, 2003; a map of what was left of 970 is on Jeff Morrison's fourth Super Secret Route Page.
    Iowa 478
    This was a former segment of US 63 between the north city limits of New Hampton and IA 24 that was bypassed in 2002 after the bypass of New Hampton opened; it is signed as part of Business US 63. It was transferred to the city on November 1, 2003, based on correspondence Dennis Swanson had with the DOT. (The transfer was delayed until the railroad crossing to the Sparboe Foods plant, housed in a former Sara Lee plant, was repaired.)

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