Iowa Highway 31

Iowa Highway 31 (Iowa 31) is a diagonal state highway which runs from Iowa Highway 141 (Iowa 141) in Smithland to U.S. Highway 59 (US 59) east of Quimby. For most of its length, the highway runs parallel to the Little Sioux River. Since its designation, the route has changed very little. The route was paved by the mid-1960s.

Iowa Highway 31
Iowa 31 highlighted in red
Route information
Maintained by Iowa DOT
Length	38.856 mi (62.533 km)
Major junctions
South end	Iowa 141 / CR L12 at Smithland
Major intersections	US 20 at Correctionville
North end	US 59 / CR C63 near Quimby
Location
Country	United States
State	Iowa
Counties	Woodbury Ida Cherokee
Highway system
Iowa Primary Highway System Interstate US State Secondary Scenic
← US 30 → Iowa 32

Route description

Iowa Highway 31 begins at an intersection with Iowa Highway 141, Main Street in Smithland. The route heads north along Hickory Street and out of town parallel to the western bank of the Little Sioux River. It heads to the north-northeast for 20 miles (32 km) through the Woodbury County communities of Oto and Anthon, and crosses the Little Sioux southwest of Correctionville.

At Correctionville, Iowa 31 intersects U.S. Highway 20 and then curves around following the eastern bank of the Little Sioux. The route continues north-northeast, clipping the northwestern corner of Ida County, before entering Cherokee County south of Washta. At Quimby, the route turns east and travels 4 miles (6.4 km) to its northern end at U.S. Highway 59.

History

From its designation, Iowa 31 has run from Smithland to Quimby on a road which runs parallel to the Little Sioux River. In 1926, the route continued along the Little Sioux, ending at Primary Road No. 21, now U.S. Highway 59. By 1947, US 59 was straightened, and Iowa 31 followed the former alignment of US 59 to end at the straighter road. By 1952, Iowa 31 had moved onto its current alignment, where it remains to this day. By 1966, the highway was paved in its entirety.

Major intersections

County	Location	mi	km	Destinations	Notes
Woodbury	Smithland	0.000	0.000	Iowa 141 (Main Street) / CR L12 (S. Hickory Street) – Mapleton, Sloan
	Correctionville	20.721	33.347	US 20 west – Holstein	Southern end of US 20 overlap
		20.975	33.756	US 20 east (11th Street) – Moville	Northern end of US 20 overlap
Ida	No major junctions
Cherokee	Silver Township	38.856	62.533	US 59 / CR C63 east – Cherokee, Holstein, Storm Lake
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus

External links

Template:Attached KML/Iowa Highway 31

KML is from Wikidata

• End of Iowa 31 at Iowa Highway Ends