41st Street Diverging Diamond Interchange

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41th Street Diverging Diamond Interchange

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June 28, 2022 Construction Update

  • Paving on Marion Road between 41st Street and 44th Street is complete and reopened to traffic.
  • Paving on 41st street began the week of June 20 starting at Marion Road and working toward the east. Intermittent intersection closures will continue as paving progresses.
  • In July and August, lane closures will go into effect on I-29 with two lanes of traffic remaining open. Crews will begin storm drainage work along I-29 with bridge improvements on the I-29 overpass.
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A safer route for you.

SDDOT and the City of Sioux Falls are constructing a new diverging diamond interchange as the safest option for the most heavily traveled street in Sioux Falls and the state of South Dakota.

The diverging diamond was chosen because of the safety features, greater capacity and efficiency that it provides for the traveling public, it reduces the conflict of left-hand turn movements and meets the needs of all road users to accommodate large trucks, pedestrians and bicyclists.

What is a diverging diamond interchange (DDI)?

Construction Progress

Construction began in early 2022 and is anticipated to be completed in summer 2024. The project is divided into two phases: west and east. The west half of the project area includes 41st Street from Marion Road to Meadow Avenue. The east half includes 41st Street from Meadow Avenue to Shirley Avenue.

Click or tap on the dots to see more detail about a particular area.

Project overview map ? South Side of 41st Street West of I-29 (2022)

South Side of 41st Street West of I-29 (2022)

Construction progresses on the south side of 41st Street west of I-29.

  • Removals

    In Progress
    Completed
  • Sanitary Sewer

    In Progress
    Completed
  • Water Main

    In Progress
    Completed
  • Drainage

    In Progress
    Completed
  • Grading

    In Progress
    Completed
  • Gravel

    In Progress
    Completed
  • Concrete Paving

    In Progress
    Completed
  • Misc Concrete

    In Progress
    Completed
  • Restoration

    In Progress
    Completed
? Marion Road South of 41st Street (2022)

Marion Road South of 41st Street (2022)

Construction progresses on Marion Road south of 41st Street.

  • Removals

    In Progress
    Completed
  • Sanitary Sewer

    In Progress
    Completed
  • Water Main

    In Progress
    Completed
  • Drainage

    In Progress
    Completed
  • Grading

    In Progress
    Completed
  • Gravel

    In Progress
    Completed
  • Concrete Paving

    In Progress
    Completed
  • Misc Concrete

    In Progress
    Completed
  • Restoration

    In Progress
    Completed
? North Side of 41st Street West of I-29 (2022)

North Side of 41st Street West of I-29 (2022)

Construction has not started on the north side of 41st Street west of I-29.

  • Removals

    In Progress
    Completed
  • Sanitary Sewer

    In Progress
    Completed
  • Water Main

    In Progress
    Completed
  • Drainage

    In Progress
    Completed
  • Grading

    In Progress
    Completed
  • Gravel

    In Progress
    Completed
  • Concrete Paving

    In Progress
    Completed
  • Misc Concrete

    In Progress
    Completed
  • Restoration

    In Progress
    Completed
? Marion Road North of 41st Street (2022)

Marion Road North of 41st Street (2022)

Construction has not started on Marion Road north of 41st Street.

  • Removals

    In Progress
    Completed
  • Sanitary Sewer

    In Progress
    Completed
  • Water Main

    In Progress
    Completed
  • Drainage

    In Progress
    Completed
  • Grading

    In Progress
    Completed
  • Gravel

    In Progress
    Completed
  • Concrete Paving

    In Progress
    Completed
  • Misc Concrete

    In Progress
    Completed
  • Restoration

    In Progress
    Completed
? I-29 Interchange Work (2022-2023)

I-29 Interchange Work (2022-2023)

Construction has not started on the new interchange.

  • Removals

    In Progress
    Completed
  • Sanitary Sewer

    In Progress
    Completed
  • Water Main

    In Progress
    Completed
  • Drainage

    In Progress
    Completed
  • Grading

    In Progress
    Completed
  • Gravel

    In Progress
    Completed
  • Concrete Paving

    In Progress
    Completed
  • Misc Concrete

    In Progress
    Completed
  • Restoration

    In Progress
    Completed
? South Side of 41st Street East of I-29 (2023)

South Side of 41st Street East of I-29 (2023)

Construction has not started on the south side of 41st Street east of I-29.

  • Removals

    In Progress
    Completed
  • Sanitary Sewer

    In Progress
    Completed
  • Water Main

    In Progress
    Completed
  • Drainage

    In Progress
    Completed
  • Grading

    In Progress
    Completed
  • Gravel

    In Progress
    Completed
  • Concrete Paving

    In Progress
    Completed
  • Misc Concrete

    In Progress
    Completed
  • Restoration

    In Progress
    Completed
? North Side of 41st Street East of I-29 (2023)

North Side of 41st Street East of I-29 (2023)

Construction has not started on the north side of 41st Street east of I-29.

  • Removals

    In Progress
    Completed
  • Sanitary Sewer

    In Progress
    Completed
  • Water Main

    In Progress
    Completed
  • Drainage

    In Progress
    Completed
  • Grading

    In Progress
    Completed
  • Gravel

    In Progress
    Completed
  • Concrete Paving

    In Progress
    Completed
  • Misc Concrete

    In Progress
    Completed
  • Restoration

    In Progress
    Completed
  • April - November 2022

    41st Street construction from Marion Road to Meadow Avenue (west half of project area)

  • April - November 2023

    41st Street construction from Meadow Avenue to Shirley Avenue (east half of project area)

  • April - June 2024

    Finishing touches and clean-up; complete construction

 

We're making this as smooth as possible.

  • 41st Street will have one lane in each direction that remains open to traffic at all times.
  • Monitoring 41st Street intersections with live cameras and making signal adjustments in “real-time”.
  • Adjusting signal timings on alternate routes to compensate for additional traffic.
  • Keeping alternate routes free from construction.