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I-29 Sioux City Corridor Reconstruction

Sioux City, IA
I-29 Sioux City Corridor Reconstruction-Sioux City, IA

The I-29 reconstruction project begins at the Iowa / South Dakota State Line, and extends south / southeast (through the City of Sioux City) a little over 11 miles, to end less than a mile south of the interchange for the City of Sergeant Bluff and the Sioux Gateway Airport. The project will improve safety, traffic operations, and infrastructure conditions, and provide for enhanced driver expectancy.

The project, which consists of reconstruction of the existing interstate from 4-lanes to 6-lanes, began in 2004 with NEPA / EIS studies and a Location Study. Construction began in 2009. Construction has continued simultaneously within 3 different segments of the corridor through the present. Starting next year, all construction north and south of the City of Sioux City should be complete, and the remaining reconstruction projects will be located along the Downtown Commercial District. Final Construction Project Award is anticipated for 2019, with construction being completed in the 2020 time frame.


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