Sioux Falls updates residents on major street, bridge and interchange construction

Several major roadway, bridge and interchange projects in Sioux Falls are expected to reach substantial completion this fall, according to a midseason update issued by the city and the South Dakota Department of Transportation.

The update also identifies a planned August construction milestone: crews are scheduled to install support beams for a new bridge that will carry traffic onto southbound Interstate 29.

City and state transportation officials released the update July 22, 2026, as the city described the 2026 construction season as reaching its midpoint. The announcement covers projects jointly tracked by the City of Sioux Falls and SDDOT.

August milestone on southbound I-29 connection

The planned support-beam installation is the next specifically identified timing in the update. The beams are for a new bridge designed to carry traffic onto southbound I-29.

The August work is a planned construction step, not a statement that the bridge project will be complete that month. The update does not provide a full project-by-project closure schedule or a specific installation date within August.

What the fall outlook means

The city said several of the major projects covered by the update are expected to reach substantial completion in fall 2026. That is a projected milestone rather than confirmation that every project in the update will be finished in the fall.

No number of projects expected to reach substantial completion was provided in the available update. It also does not list all individual completion dates for the roadway, bridge and interchange work it covers.

Construction activity is expected to affect travel patterns and work-zone conditions across Sioux Falls. The available information does not quantify anticipated delays or traffic volumes, and it does not provide a complete schedule of closures.

Who is affected and what comes next

The update is relevant to people traveling through Sioux Falls, particularly those using major routes affected by roadway, bridge and interchange construction. The city and SDDOT are jointly tracking the projects described in the announcement.

The next announced milestone is the August installation of support beams for the new bridge connection to southbound I-29. Beyond that August work, the city’s stated outlook is that several major projects are expected to reach substantial completion this fall.