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| 340-359 | 360 | 361 | 362 | 363 | 364 | 365 | 366 | 367 | 368 | 369 | 380-399 |
| 370 | 371 | 372 | 373 | 374 | 375 | 376 | 377 | 378 | 379 | ||
| Iowa 362 (I) |
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Designated: November 23, 1938 Decommissioned: November 14, 1980 Original western terminus: Macedonia Original eastern terminus: US 59 in southern Pottawattamie County Counties: Pottawattamie Paving history: Unpaved at designation, the road was paved in 1956. Replaced by: County Road G66 Note: The legal description for IA 362 notes that the state received jurisdiction of IA 362 (II) before transferring the first IA 362 to local control. Both versions of IA 362 appeared on the 1981 state transportation map. Former terminus photos |
| Iowa 362 (II) |
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Designated: August 1, 1980 Decommissioned: July 1, 2003 Original western terminus: DeSoto Bend National Wildlife Refuge Original eastern terminus: I-29 (exit #72) west of Loveland Counties: Pottawattamie Paving history: Unpaved at designation, it had a bituminous surface at decommissioning and remains that way today. However, Rand McNally maps of the 1990s and early 2000s incorrectly showed it as a four-lane extension of I-680. With IA 362's decommissioning, there are no longer any unpaved state highways. Replaced by: County Road G12 Terminus photos |
| Iowa 363 |
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Designated: February 1, 1939 (number approved December 6, 1938) Decommissioned: July 1, 2003 Original western terminus: IA 11, later IA 150 Original eastern terminus: Urbana Counties: Benton Paving history: Unpaved at designation, the road was paved in 1955. Major alignment change: On August 14, 1984, it was converted from a spur into Urbana to a connecting road between IA 150 and the newly-completed I-380 upon the interstate's opening; the old segment along Ash and Wood Streets in Urbana was unsigned IA 919 until July 1, 1995. Replaced by: Local road (Sunset Street in Urbana). IA 363 replaced IA 92 (I); although it was absent from state transportation maps after 1991, it was probably due to the lack of space on the map as the road was fully signed until its decommissioning. Terminus photos |
| Iowa 364 |
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Designated: November 22, 1938 Decommissioned: July 1, 2003 Original northern terminus: Harpers Ferry. It followed Chestnut Street in town until July 7, 1980, when most of the route inside Harpers Ferry was decommissioned. From then until 2003 its north end was at the bridge over Cota Creek. Original southern terminus: IA 76 Counties: Allamakee Paving history: Unpaved at designation, the road was paved in 1959. IA 364 followed present-day Old Junction Drive before paving. Replaced by: County Road X52 (at decommissioning) Terminus photos |
| Iowa 365 |
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Designated: January 17, 1939 Decommissioned: November 4, 1980 Original northern terminus: IA 92 Original southern terminus: Tracy Counties: Marion Paving history: Unpaved at designation, the road was paved in 1960. Replaced by: County Road T25 (despite IA 92's relocation in 1978, the north end of IA 365 did not change) Former terminus photos |
| Iowa 367 (I) |
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Designated: January 18, 1939 Decommissioned: July 1, 1941 Original western terminus: Nebraska state line (Missouri River) at Council Bluffs Original eastern terminus: US 275 southeast of Council Bluffs Counties: Pottawattamie Paving history: The entire road was paved at the time of designation. Replaced by: Relocated US 275 For maps of the route, see Jeff Morrison's Council Bluffs/Omaha Highway Chronology page. |
| Iowa 367 (II) |
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Designated: September 22, 1942 Decommissioned: July 1, 1980 (the city of Rutland assumed jurisdiction of its piece on July 15) Original western terminus: Rutland Original eastern terminus: US 169 north of Humboldt Counties: Humboldt Paving history: Unpaved at designation, it was paved in 1957. Replaced by: County Road C29 |
| Iowa 368 (II) |
| This was the designation for two former half-mile segments of IA 5 that were bypassed by a parallel four-lane road to the north that opened on December 13, 2002. One segment ran along the north city limits of Hartford between a point west of Vine Street and 215th Street; the other was a dead-end segment northwest of Pleasantville. After the Pleasantville bypass opened, the designation was also given to the rest of the bypassed IA 5. On October 20, 2004, the segments within Marion County and the city of Hartford were turned over to local jurisdictions. However, a small piece of IA 368 in Warren County northwest of Hartford remains under state control. |
| Iowa 369 (I) |
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Designated: June 20, 1939 Decommissioned: 1941 Original northern terminus: IA 92 east of Knoxville Original southern terminus: Coal mine located between Pershing and Tracy Counties: Marion Paving history: There were no paved segments. Replaced by: Unnumbered county roads. It followed present-day County Road T17 southward for two miles and turned westward for half a mile to the mine; the mine is abandoned now and the east-west segment has since been removed. |
| Iowa 369 (II) |
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Designated: September 22, 1942 Decommissioned: August 21, 1980 Original northern terminus: Unionville Original southern terminus: IA 2 Counties: Appanoose Paving history: Unpaved at designation, the road was paved in 1963. Replaced by: County Road T61; the half-mile segment in Unionville was still maintained by the state as unsigned IA 938 until May 1, 2003. |
| Iowa 370 (II) |
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Designated: December 17, 1952 (number approved September 10) Decommissioned: November 2014 Original western terminus: Nebraska state line (Missouri River) at Bellevue, NE; continuation of NE 370 via a toll bridge that opened on the day of designation Original eastern terminus: US 275 south of Council Bluffs. Pottawattamie County took over its share of the road on October 6, 1980, and the entire segment in Mills County was briefly renumbered as unsigned IA 935. However, on February 17, 1983, IA 370 was resurrected west of I-29, with the IA 935 designation being retained between I-29 and the Mills/Pottawattamie county line until that segment was turned over to the county on July 1, 2003. Counties: Mills, Pottawattamie (1952-1980) Paving history: Unpaved at designation, the road was paved in 1955. Replaced by: County Road H10. The remaining segment was turned over shortly after the new US 34 bridge opened south of Bellevue; at the same time, Nebraska decommissioned its piece of NE 370 east of US 75. Terminus photos |
| Iowa 371 |
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Designated: August 21, 1939 Decommissioned: May 1, 2003 Original northern terminus: IA 92 east of Oskaloosa Original southern terminus: Lake Keomah State Park Counties: Mahaska Paving history: Unpaved at designation, it was upgraded from bituminous to paved in 1981 or 1982. Replaced by: Unnumbered county road (Queens Avenue); although the former south end continued as T67, there are no reassurance markers along 371 itself. Terminus photos |
| Iowa 372 |
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Designated: September 6, 1939 Decommissioned: October 16, 1968 Original western terminus: Preparation Canyon State Park Original eastern terminus: IA 183 southwest of Moorhead Counties: Monona Paving history: Unpaved at designation, it was gravel at the time of decommissioning (but has since been paved). Replaced by: County Road E60 |
| Iowa 373 (II) |
| This was an unsigned designation for a former 0.7-mile segment of US 61/IA 92 southwest of Muscatine, between Fruitland Road and the Muscatine Slough, that was bypassed by a new four-lane road paralleling it to the east that opened in July 2002. The city of Muscatine took over its piece of the road on May 1, 2003, while Muscatine County took over its share on June 6, 2003. |
| Iowa 374 (I) |
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Designated: 1942 Decommissioned: August 7, 1980 Original western terminus: US 71 in southern Clay County Original eastern terminus: Webb Counties: Clay Paving history: Unpaved at designation, it was paved in 1955. Replaced by: County Road B63 and Main Street in Webb |
| Iowa 374 (II) |
| This unsigned highway was assigned to the former segment of IA 163 through Monroe that was bypassed in 1999. The city of Monroe took over its piece of the road on February 21, 2000, and Jasper County took over its piece on July 18, 2000. |
| Iowa 375 |
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Designated: July 1, 1941 Decommissioned: July 1, 1971 Original northern terminus: US 6 in downtown Council Bluffs Original southern terminus: US 275/IA 92 in southeast Council Bluffs Counties: Pottawattamie Paving history: The entire road was paved at the time of designation. Replaced by: An extension of IA 192 (along 4th Street, shifted from Main Street in 1954) and city streets (9th Avenue, 3rd Street, and Harry Langdon Boulevard). This was part of US 275 before it was relocated onto the former IA 367 (I). For maps of the route, see Jeff Morrison's Council Bluffs/Omaha Highway Chronology page. |
| Iowa 376 |
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Length: 9 miles/14 kilometers Northern terminus: US 75 at the north edge of Sioux City Southern terminus: I-29 (exit 143) in Sioux City Terminus photos Counties: Woodbury Designated in 2001 to a former segment of US 75 after it was relocated on a new freeway segment; it is signed as Business US 75 instead. For maps of the route, see Jeff Morrison's Sioux City Highway Chronology page. |
| Iowa 377 |
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Designated: October 6, 1942 Decommissioned: July 1, 1980 Original western terminus: Harbor Drive in Sioux City Original eastern terminus: US 75 (Front Street) in Sergeant Bluff Counties: Woodbury Paving history: The entire road was paved by the end of 1943. Replaced by: City street (8th Street in Sergeant Bluff); a 0.2-mile segment between Harbor Drive and I-29, straddling the border between Sioux City and Sergeant Bluff, was still maintained by the state as IA 377 until July 1, 2003. For maps of the route, see Jeff Morrison's Sioux City Highway Chronology page. |
| Iowa 378 |
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Designated: October 6, 1942 Decommissioned: October 1, 1974 Original western terminus: Sioux Gateway Airport in Sioux City Original eastern terminus: US 75 (Front Street) in Sergeant Bluff; it was extended eastward to IA 230 (now County Road K29) in 1957 but truncated back to US 75 in 1965 after IA 230 was decommissioned. Counties: Woodbury Paving history: The entire road was paved by the end of 1943. Replaced by: City streets (Ogden Avenue in Sioux City, and 1st Street in Sergeant Bluff); the road continues as County Road D38 east of Sergeant Bluff. Unlike IA 377, there was a direct interchange with I-29. For maps of the route, see Jeff Morrison's Sioux City Highway Chronology page. |
| Iowa 379 |
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Designated: October 20, 1942 Decommissioned: July 1, 1980 Original northern terminus: IA 105 Original southern terminus: Joice Counties: Worth Paving history: Unpaved at designation, it was paved in 1957. Replaced by: County Road S10, plus Main Street in Joice |