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The state is planning new bridges to replace the 10th and 11th Street viaducts on the east side of downtown Sioux Falls. Four design options are on the table, and public comments are open through Tuesday, Nov. 10.
The South Dakota Department of Transportation (SDDOT) runs the study and pays for the new bridges. The City of Sioux Falls owns the viaducts and will handle the streets that connect to them. The Federal Highway Administration signs off on the environmental review. HDR is the engineering firm doing the study.
After comments close, the study team writes a draft report, then a final report. A full environmental review comes next, about a year long, with its own public meeting. Construction is tentatively set for 2032 on 10th Street and 2036 on 11th.
Comment on the four options for the new 10th and 11th Street bridges.
I stopped by Tuesday's open house on the 10th and 11th Street viaducts. If you missed it, you didn't miss anything new. Here's what it was like, what people wrote on the maps, and how to comment before Nov. 10.
Read moreThe 10th and 11th Street viaducts will be rebuilt in the next decade. Here's what's on the table, who's at the table, and how to have your say before comments close Nov. 10.
Read moreConstruction is tentatively set for 2032 on 10th Street and 2036 on 11th Street, after an environmental review that takes about a year.
Comment on the study website, 1011viaductstudy.com, by Tuesday, Nov. 10, 2026, or mail a comment to HDR at 101 S. Phillips Ave., Suite 401.
SDDOT leads the study and recommends what gets built, working with the City of Sioux Falls. The Federal Highway Administration signs off on the environmental review.
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Also on the table
Open for inputUpdated Nov. 2The state is studying 130 railroad crossings around Sioux Falls to make them safer, and some could close. Comments and pins on the online map are open through Monday, Nov. 30.
Next Mon. Nov. 30: Last day to comment on railroad crossings
Where it stands
Open for inputUpdated Nov. 2A large data center campus has been proposed in northeast Sioux Falls, and the City Council is writing new rules for data centers. A council committee is taking public input, with proposed rules due Nov. 27 and a report to the full council on Jan. 12.
Next Mon. Nov. 9: Data center committee meeting
Where it stands
Open for inputUpdated Nov. 9Sioux Falls Listens is a series of public listening sessions Mayor Christine Erickson is holding during her first 100 days. One session remains, on Nov. 12, followed by a town hall on Nov. 18, and you can also share ideas online.
Next Thu. Nov. 12: Sioux Falls Listens: Economic development
Where it stands