Iowa Highway 23
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| Maintained by Iowa DOT | ||||
| Length: | 16.022 mi (25.785 km) | |||
| Existed: | 1997 – present | |||
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| South end: |
 Iowa 149 near Fremont
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| North end: |
 Iowa 92 at Oskaloosa
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Iowa Highway 23 (Iowa 23) is a 16-mile-long (26 km) state highway in the southeastern part of the state. Its designation begins at Iowa 149 north of Ottumwa and ends at Iowa 92 in Oskaloosa.
The route was created in 1997 when U.S. Route 63 (US 63) was rerouted along a new, four-lane expressway that subsumed part of a previous Iowa 23. The new Iowa 23 was signed along the two-lane road that was vacated by US 63.
Iowa 23 begins at an intersection with Iowa 149 along the Mahaska–Keokuk county line north of Ottumwa. It heads north along the county line for three miles (4.8 km) before it eases to the northwest into Mahaska County and into Fremont. West of Fremont, the highway follows an east-to-west path until it reaches Cedar, an unincorporated community. In Cedar, Iowa 23 turns to the northwest. It continues to the northwest over a plain. As it approaches Oskaloosa, the corn and soybean fields that had lined the road give way to agribusinesses of on the outskirts of southeastern Oskaloosa. The roadway turns to the north near University Park. It then enters the city limits of Oskaloosa again where it ends shortly thereafter at Iowa 92.
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