1969 Iowa highway renumbering

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On January 1, 1969, the Iowa State Highway Commission, now known as the Iowa Department of Transportation, renumbered several state highways. The changes to the highway system fixed a number of issues: creating continuous route numbers across state lines, removing duplicate route numbers where they were unnecessary, and extending route numbers in some locations. Twenty-six sections of highway were assigned new route numbers, duplicate route numbers were removed on eleven sections, and one route number was extended to another section.[1]

New routes

Number Length (mi)[2] Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes
Iowa 4 148.67 239.26 Iowa 44 in Panora MN 4 at the Minnesota state line 01969-01-011969 current Previously Iowa 17
Iowa 5 104.55 168.26 Route 5 at the Missouri state line I-35 at West Des Moines 01969-01-011969 current Previously Iowa 60
Iowa 7 76.27 122.74 Iowa 3 near Aurelia US 20 in Fort Dodge 01969-01-011969 current Previously Iowa 5
Iowa 15 63.52 102.23 Iowa 3 near Rolfe MN 15 at the Minnesota state line 01969-01-011969 current Previously Iowa 44
Iowa 15 4.79 7.71 Route 15 at the Missouri state line Iowa 2 at Milton 01969-01-011969 02003-07-012003 Previously Iowa 23
Iowa 17 102.62 165.15 Iowa 141 at Granger US 18 at Wesley 01969-01-011969 current Previously Iowa 60
Iowa 23 14.66 23.59 Iowa 137 in Eddyville US 63 in Ottumwa 01969-01-011969 01997-07-161997 Previously Iowa 15
Iowa 26 11.44 18.41 Iowa 9 in Lansing MN 26 at the Minnesota state line 01969-01-011969 current Previously Iowa 182
Iowa 39 24.42 39.30 US 59 / Iowa 141 at Dension Iowa 175 in Odebolt 01969-01-011969 current Previously Iowa 4
Iowa 44 104.83 168.71 US 30 near Logan Iowa 141 near Grimes 01969-01-011969 current Previously Iowa 39 and Iowa 64
Iowa 60 55.93 90.01 US 75 near Le Mars MN 60 at the Minnesota state line 01969-01-011969 current Previously Iowa 33
Iowa 70 25.91 41.70 Columbus City US 6 in West Liberty 01969-01-011969 current Previously Iowa 76
Iowa 76 44.82 72.13 US 18 in Marquette MN 76 at the Minnesota state line 01969-01-011969 current Previously Iowa 13
Iowa 81 2.22 3.57 Route 81 at the Missouri state line Iowa 2 at Farmington 01969-01-011969 current Previously Iowa 114
Iowa 114 9.20 14.81 Iowa 92 near West Chester Iowa 22 at Wellman 01969-01-011969 01980-01-011980 Previously Iowa 81
Iowa 130 38.80 62.44 Iowa 38 in Tipton US 61 / US 67 in Davenport 01969-01-011969 current Previously Iowa 150
Iowa 182 9.36 15.06 US 18 in Inwood Iowa 9 near Larchwood 01969-01-011969 current Previously Iowa 26
Iowa 202 10.50 16.90 Route 202 at the Missouri state line Iowa 2 near Moulton 01969-01-011969 current Previously Iowa 142
Iowa 254 7.91 12.73 Iowa 9 near Buffalo Center MN 254 at the Minnesota state line 01969-01-011969 01980-01-011980 Previously Iowa 322
Iowa 322 0.45 0.72 Massena Iowa 92 at Massena 01969-01-011969 01972-07-011972 Previously Iowa 254
Iowa 985 5.57 8.96 I-29 / US 20 / US 77 in Sioux City Woodbury–Plymouth county line at Sioux City 01969-01-011969 01973-01-011973 Previously Iowa 7

Former routes

Number Length (mi)[3] Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes
Iowa 4 29.41 47.33 US 59 / Iowa 141 at Denison Iowa 175 at Odebolt 01920-01-011920 01968-12-311968 Became Iowa 39
Iowa 5 76.57 123.23 Iowa 3 near Aurelia US 20 in Fort Dodge 01920-01-011920 01968-12-311968 Became Iowa 7
Iowa 7 22.09 35.55 I-29 / US 77 in Sioux City Iowa 3 near Brunsville 01957-01-011957 01968-12-311968 Portions given to Plymouth County and the rest became Iowa 985
Iowa 15 14.66 23.59 Iowa 137 in Eddyville US 63 in Ottumwa 01937-01-011937 01968-12-311968 Became Iowa 23
Iowa 17 146.43 235.66 Iowa 64 in Panora MN 4 at the Minnesota state line 01920-01-011920 01968-12-311968 Became Iowa 4
Iowa 23 4.78 7.69 Route 15 at the Missouri state line Iowa 2 in Milton 01926-01-011926 01968-12-311968 Became Iowa 15
Iowa 26 9.31 14.98 US 18 in Inwood Iowa 9 near Larchwood 01930-01-011930 01968-12-311968 Became Iowa 182
Iowa 33 55.90 89.96 US 75 near Le Mars MN 60 at the Minnesota state line 01931-01-011931 01968-12-311968 Became Iowa 60
Iowa 39 11.63 18.72 US 30 near Logan Iowa 64 / Iowa 191 in Portsmouth 01920-01-011920 01968-12-311968 Became part of Iowa 44
Iowa 44 63.63 102.40 Iowa 3 near Rolfe MN 15 at the Minnesota state line 01920-01-011920 01968-12-311968 Became Iowa 15
Iowa 60 225.27 362.54 Route 5 at the Missouri state line US 18 at Wesley 01920-01-011920 01968-12-311968 Became Iowa 5 and Iowa 17
Iowa 76 25.91 41.70 Columbus City US 6 in West Liberty 01920-01-011920 01968-12-311968 Became Iowa 70
Iowa 81 9.20 14.81 Iowa 92 near West Chester Iowa 22 at Wellman 01920-01-011920 01968-12-311968 Became Iowa 114
Iowa 114 2.22 3.57 Route 81 at the Missouri state line Iowa 2 at Farmington 01924-01-011924 01968-12-311968 Became Iowa 81
Iowa 142 10.50 16.90 Route 202 at the Missouri state line Iowa 2 near Moulton 01926-01-011926 01968-12-311968 Became Iowa 202
Iowa 182 11.44 18.41 Iowa 9 in Lansing MN 26 at the Minnesota state line 01930-01-011930 01968-12-311968 Became Iowa 26
Iowa 254 0.45 0.72 Massena Iowa 92 at Massena 01932-01-011932 01968-12-311968 Became Iowa 322
Iowa 322 7.91 12.73 Iowa 9 near Buffalo Center MN 254 at the Minnesota state line 01935-01-011935 01968-12-311968 Became Iowa 254

Existing route changes

Number Change in length Southern or western terminus Northern or eastern terminus Formed Removed Notes
mi[a] km
Iowa 13 -46.66 −75.09 US 151 near Marion
US 52 near Froelich		 US 30 near Bertram
MN 76 near Dorchester 		01920-01-011920 current Extended over Iowa 150 and truncated north of US 52
Iowa 21 21.46 34.54 Iowa 8 at Dysart Iowa 412 in Waterloo 01934-01-011934 current Extended over new road
Iowa 64 -273.76 −440.57 US 6 in Council Bluffs US 151 in Anamosa 01936-01-011936 current Mileage assigned to Iowa 191, Iowa 44, and Iowa 330
Iowa 150 -80.15 −128.99 US 151 / Iowa 13 in Marion US 61 / US 67 in Davenport 01941-01-011941 current Assigned to Iowa 13 and Iowa 130
Iowa 191 30.52 49.12 US 6 in Council Bluffs Iowa 44 in Portsmouth 01930-01-011930 current Extended over Iowa 64
Iowa 330 20.72 33.35 US 65 / Iowa 117 near Mingo US 30 in Marshalltown 01948-01-011948 current Extended over Iowa 64

Notes

  1. ^ Calculated by subtracting the 1965 mileage from the 1970 mileage[2][3]

References

  1. ^ "New Iowa Map Goes on Sale". Telegraph-Herald. Dubuque, Iowa. January 14, 1969. Retrieved January 9, 2011 – via Google News.
  2. ^ a b 1970 Volume of Traffic on the Primary Road System of Iowa (PDF) (Report). Iowa State Highway Commission. July 1971. Retrieved August 18, 2020.
  3. ^ a b 1965 Volume of Traffic on the Primary Road System of Iowa (PDF) (Report). Iowa State Highway Commission. June 1966. Retrieved August 18, 2020.

See also

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