Interstate 29 in Iowa

Interstate 29 marker
Interstate 29
Map
I-29 highlighted in red
Route information
Maintained by Iowa DOT
Length151.826 mi[1] (244.340 km)
ExistedOctober 1, 1958 (1958-10-01)[2]–present
HistoryUnder construction 1958–1972
Tourist
routes
Lewis and Clark Trail
NHSEntire route
Major junctions
South end I-29 near Hamburg
Major intersections
North end I-29 at Sioux City
Location
CountryUnited States
StateIowa
Counties
Highway system
Iowa 28 US 30

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, it runs on the flat land between the Missouri River and the Loess Hills.

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.

  1. ^ 2009 Volume of Traffic on the Primary Road System of Iowa (PDF) (Report). Iowa Department of Transportation. January 1, 2009. Retrieved September 8, 2010.
  2. ^ Completion Map of Interstate System (PDF) (Map). Iowa Department of Transportation. January 1, 1982. Archived from the original (PDF) on September 29, 2011. Retrieved September 8, 2010.