Interstate 29 in Iowa

Interstate 29
Interstate 29
	I-29 highlighted in red
Route information
	Maintained by Iowa DOT
Length	151.826 mi (244.340 km)
Existed	October 1, 1958–present
History	Under construction 1958–1972
Tourist; routes	Lewis and Clark Trail
NHS	Entire route
Major junctions
South end	I-29 near Hamburg
	US 34 / US 275 near Glenwood; US 275 at Council Bluffs; I-80 at Council Bluffs; I-480 / US 6 at Council Bluffs; I-680 near Crescent; I-880 in Loveland; US 30 at Missouri Valley; I-129 / US 20 / US 75 at Sioux City; US 77 at Sioux City;
North end	I-29 at Sioux City
Location
Country	United States
State	Iowa
Counties	Fremont; Mills; Pottawattamie; Harrison; Monona; Woodbury;
Highway system
	Interstate Highway System; Main; Auxiliary; Suffixed; Business; Future; Iowa Primary Highway System; Interstate; US; State; Secondary; Scenic;

In the US state of Iowa, Interstate 29 (I-29) is a north–south Interstate Highway which closely parallels the Missouri River. I-29 enters Iowa from Missouri near Hamburg and heads to the north-northwest through the Omaha–Council Bluffs and the Sioux City areas. It exits the state by crossing the Big Sioux River into South Dakota. For its entire distance through the state, I-29 runs on the flat land between the Missouri River and the Loess Hills, and is also part of the Lewis and Clark Trail.

I-29 was built in sections over a period of 15 years. When there was a shortage of male workers, female workers stepped in to build a 20-mile (32 km) section near Missouri Valley. Between Council Bluffs and Sioux City, I-29 replaced U.S. Highway 75 (US 75) as the major route in western Iowa. As a result of I-29's creation, US 75 south of Sioux City was relocated into Nebraska.