10th and 11st Street Viaduct Major Investment Study

About the Project

The South Dakota Department of Transportation (SDDOT), in conjunction with the City of Sioux Falls, South Eastern Council of Governments/Sioux Falls Metropolitan Planning Organization, and Federal Highway Administration, have initiated a study of the 10th and 11th Street Viaducts in Sioux Falls, S.D. to identify existing issues, evaluate alternatives, and develop a plan for replacement of the viaduct structures. Ownership of the existing viaduct structures was transferred from the SDDOT to the City of Sioux Falls in 2006. However, the SDDOT is still responsible for the cost of replacing these structures.

The SDDOT estimates that the 10th Street structure is nearing the end of its structural life and has been tentatively programmed for replacement beginning in 2032. The 11th Street structure is recommended for replacement starting in 2036. Upon replacement, the new bridges will be the responsibility of the City of Sioux Falls. Multimodal and active transportation travel on or under the viaduct structures will be key elements of the study.

Ultimately, this major investment study will identify and evaluate feasible replacement scenarios for the two structures and determine a recommendation.

Objectives

Identify transportation issues and needs for the 10th Street and 11th Street corridors
Develop feasible solutions to address the identified issues and needs
Engage the public and stakeholders
Create final products for the SDDOT and City of Sioux Falls, which will guide implementation of recommended improvements