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| 30-39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50-59 |
| Iowa 40 (I) |
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Designated: July 1, 1920 Decommissioned: October 16, 1926 Original northern terminus: Minnesota state line south of Lyle, MN; the number continued into Minnesota. Original southern terminus: IA 20 in Keokuk Counties: Mitchell, Floyd, Chickasaw, Bremer, Black Hawk, Benton, Linn, Johnson, Washington, Henry, Lee Paving history: There were no paved segments at designation. Note: State highway maps prior to 1926 showed that IA 5 (I) and IA 40 had run on different alignments between Cedar Falls and Waterloo than US 20 and 218 did, with IA 40 running north of the Cedar River. However, the Highway Commission's Service Bulletin for the fall of 1925 noted that US 218 would replace the entire route of IA 40 north of US 30, but US 218 was routed south of the Cedar River instead. Waterloo's request to have US 218 run north of the Cedar was denied at a Highway Commission meeting on December 14, 1926. For a map of its street alignment through Waterloo and Cedar Falls in 1925, see Jeff Morrison's Waterloo/Cedar Falls Highway Chronology page. For a map of its street alignment through Cedar Rapids in 1926, see the Highways of Cedar Rapids page. For a map of its estimated street alignment through Iowa City in 1925, see the Highways of Iowa City page. |
| Iowa 40 (II) |
| Designated: October 16, 1926 Decommissioned: July 1, 2003 Original northern terminus: IA 3 (I), later IA 2, west of Corydon Original southern terminus: Allerton Counties: Wayne Paving history: Unpaved at designation, it had a bituminous surface until it was paved in 1979. Replaced by: County Road S26; this replaced a former segment of IA 14. Terminus photos |
| Iowa 41 |
| Designated: July 1, 1920 Decommissioned: July 1, 2003 Original northern terminus: IA 8 (I), later US 34 Original southern terminus: Malvern Counties: Mills Paving history: Unpaved at designation, the road was paved in 1929. Replaced by: County Road L63. Terminus photos |
| Iowa 42 |
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Designated: July 1, 1920 Decommissioned: December 19, 1980 Original western terminus: IA 4, later US 275, south of Sidney Original eastern terminus: Riverton Counties: Fremont Paving history: Unpaved at designation, it had a bituminous surface until it was paved in 1975. Replaced by: County Road J46. The piece of IA 42 inside the Riverton city limits remained under state control until December 29, 1980. Former terminus photos |
| Iowa 43 |
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Designated: July 1, 1920 Decommissioned: January 1, 1980 Original northern terminus: Minnesota state line south of Fairmont, MN; it was truncated at a point two miles east of Ringsted on May 22, 1934. Original southern terminus: IA 9 in Armstrong; it was extended southward and westward to Ringsted on January 8, 1931. Counties: Emmet Paving history: Unpaved at designation, the remaining segment east of Ringsted had a bituminous surface until it was paved in 1975. Replaced by: |
| Iowa 44 (I) |
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Designated: July 1, 1920 Decommissioned: January 1, 1969 Original northern terminus: Rolfe; it was extended to US 18 near Whittemore on October 2, 1928, and to the Minnesota state line along part of IA 43 on May 22, 1934. Original southern terminus: IA 10, later IA 3, in eastern Pocahontas County. Counties: Emmet (1934-1969), Kossuth, (1928-1969), Palo Alto (1928-1969), Humboldt (1928-1969), Pocahontas Paving history: There were no paved segments at designation. Replaced by: IA 15 |
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Iowa 44 |
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Length: 105 miles/169 kilometers Western terminus: US 30 northeast of Logan Eastern terminus: IA 141 in Grimes Terminus photos Counties: Harrison, Shelby, Audubon, Guthrie, Dallas, Polk Cities along route: Portsmouth, Harlan, Kimballton, Guthrie Center, Panora, Dallas Center, Grimes NHS: The segment through Harlan |
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| History | |
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Designated: January 1, 1969, along sections of IA 39 (I) (between
US 30 and Portsmouth) and IA 64 (from Portsmouth to Grimes) Paving history: The entire road was paved at the time of designation except for the segment between US 30 and the Harrison/Shelby county line, which had a bituminous segment until it was paved in 1978. |
| Iowa 45 |
| Designated: July 1, 1920 Decommissioned: July 1, 2003 Original western terminus: IA 4 (I), now US 59 Original eastern terminus: Manilla Counties: Crawford Paving history: Unpaved at designation, the remaining segment from IA 46 (I) to Manilla was paved in 1938. Major alignment change: On November 27, 1928, IA 45 became a north-south spur between IA 46 (I), later IA 141, and Manilla after 46 superseded 45's east-west segment. Replaced by: County Road M55 (at decommissioning) Terminus photos |
| Iowa 46 (I) |
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Designated: July 1, 1920 Decommissioned: April 1, 1941 Original western terminus: Manning; it was extended westward to IA 4 (now US 59) west of Manning on November 27, 1928, replacing part of IA 45 Original eastern terminus: Coon Rapids. It was extended eastward to IA 16 (I, now IA 25) at Bayard in 1922; to Bagley on December 1, 1930; and to IA 17 (now IA 144) in Perry on May 27, 1931. Counties: Crawford (1928-1941), Carroll, Greene (1922-1941), Guthrie (1930-1941), Dallas (1931-1941) Paving history: There were no paved segments at designation. |
| Iowa 46 (II) |
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Designated: August 1942 Decommissioned: February 1, 1950 Original northern terminus: IA 90 (on Grand Avenue at the time) in downtown Des Moines Original southern terminus: IA 28 (on Army Post Road at the time) in Fort Des Moines, now part of the city of Des Moines Counties: Polk Paving history: The entire road was paved at the time of designation. Replaced by: Local city streets (mostly SW 9th Street, but it followed 9th, Mulberry, and 7th Streets to Clifton Avenue out of downtown). It replaced part of IA 28 after it was realigned. For maps of the route, see the Highways of Des Moines page. |
| Iowa 46 (III) |
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Designated: August 22, 1953 Decommissioned: December 28, 1998 Original northern terminus: IA 163 in Des Moines, at the Iowa State Fairgrounds Original southern terminus: IA 5 northwest of Carlisle Counties: Polk Paving history: The entire road was paved at the time of designation. Replaced by: City streets (SE 30th Street, Vandalia Road, and SE 43rd Street in Des Moines; Carlisle Road and SE 45th Street in Pleasant Hill; and SE 45th Street in rural Polk County). The old bridge over the Des Moines River was removed in 1998 due to its age and proximity to the new US 65 freeway; cul-de-sacs were built at the ends of the old bridge, and the remaining segments were turned over to the appropriate local jurisdictions. The segments south of Carlisle Road and north of SE 44th Avenue are now closed to public access. This incarnation of IA 46 replaced a 7½-mile segment of IA 60 (I) (now IA 5) after it was realigned onto Army Post Road. For additional information, see the Highways of Des Moines page. Former terminus photos |
| Iowa 47 (I) |
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Designated: July 1, 1920 Decommissioned: October 1940 Original western terminus: Gowrie; it was extended westward to Farnhamville on December 20, 1938 Original eastern terminus: IA 16 (I) east of Gowrie; it was extended eastward to IA 16 (later US 169) near Harcourt on October 16, 1926, upon IA 16's relocation. Counties: Calhoun (1938-1940), Webster Paving history: There were no paved segments. Replaced by: IA 175 |
| Iowa 47 (II) |
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Designated: June 24, 1941 Decommissioned: July 1, 1980 Original western terminus: IA 14 Original eastern terminus: Allison Counties: Butler Paving history: Unpaved at designation, it had a bituminous surface until it was paved in 1975 (the first state highway map to show this short road as paved was the 1976 map) Replaced by: Local road (7th Street in Allison). This was formerly part of IA 14 prior to 1939. Note: Maps prior to 1952 did not show this highway, possibly due to its short length; the approval date listed here was mentioned in the legal description. |
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Iowa 48 |
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Length: 48 miles (coincidence, no?)/77 kilometers Northern terminus: US 6 west of Lewis Southern terminus: US 59 in Shenandoah Terminus photos Counties: Cass, Montgomery, Page Cities along route: Griswold, Elliott, Red Oak, Essex, Shenandoah NHS: The segments through Red Oak and Shenandoah |
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| History | |
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Designated: July 1, 1920, from Red Oak to Shenandoah Paving history: There were no paved segments at designation. |
| Iowa 49 |
| Designated: July 1, 1920 Decommissioned: July 1, 2003 Original northern terminus: IA 8 (I), later US 34 Original southern terminus: Lenox; on October 6, 1943, it was extended southward to IA 2 in Bedford, replacing part of IA 344 (I). On May 18, 1979, it was truncated south of the newly-relocated IA 2, removing it from Bedford. Counties: Adams, Taylor Paving history: There were no paved segments at designation. Replaced by: County Roads N64, J23, N52, J35, and N44, in order from US 34 to IA 2. Terminus photos |