41st Street Diverging Diamond Interchange

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41st Street and Marion Road

41st Street and I-29

41st Street and Terry Avenue

41st Street and Marion Road

41st Street and I-29

41st Street and Terry Avenue

Phase 1 Construction includes installing sanitary sewer lines, water mains, and storm drainage. This work will include grading, temporary gravel/driveway access, concrete paving, other miscellaneous concrete work, and restoration.

Traffic Alerts

November 23 - December 6, 2022

41st Street, Marion Road to I-29

  • The permanent signal installation at the 41st Street and Marion Road intersection is on track to be completed by early December.
  • Crews are continuing to work on upgrades to the 38th Street and Shirley Avenue intersection. This work is scheduled to be completed by late winter.
  • Work to reinforce the I-29 crash wall, under the 49th Street bridge, is scheduled to be completed by early December.
  • Winterization of the construction site is in progress.
  • The parking lots for the La Quinta and IHOP have been cleaned and opened for the winter.
  • A permanent signal is being installed at 41st Street and Terry Avenue. Installation is expected to be complete by the end of December.
  • All permanent striping for 2022 has been completed. Additional striping will be completed in the spring.
  • Temporary lanes are being constructed by the southbound I-29 on-ramp and the southbound I-29 off-ramp, toward 41st Street, in preparation for the 2023 bridge construction.

Commuter Route Information

  • The inside southbound lane of I-29, at the 49th Street bridge, will be closed through early December to allow crews to work on the crash wall.
  • Motorists can expect the 38th and Shirley Avenue intersection to remain open during construction. Only one lane of traffic will be closed at any time.
  • The pedestrian crossing at I-29 and 41st Street, along the south side of 41st Street, has temporarily reopened for the winter. Pedestrians should use the signalized intersections at Marion Road or Terry Avenue to cross the street.
  • The outside right-turn lane, on the southbound I-29 off-ramp onto 41st Street, remains closed.
  • Please follow the posted signs around the closures.
View the Full Schedule
  • Spring 2022 - Reconstruction of the south side of 41st Street starts at Meadow Avenue and progresses to the west.
  • Spring 2022 - Marion Road will be closed south of 41st Street for one month. The detour uses Sertoma Avenue and 57th Street.
  • Summer 2022 - Reconstruction of the north side of 41st Street starts at Meadow Avenue and progresses to the west.
  • Fall 2022 - Marion Road will be closed north of 41st Street for one month. The detour uses Sertoma Avenue and 26th Street.
  • Time frames are all approximate, subject to change, and weather and schedule permitting.

For the latest on road and weather conditions, road closures, construction work zones, commercial vehicle restrictions, and traffic incidents, visit sd511.org or dial 511.

Marion Road Closures & Detours

2022 Spring to Fall

  • Spring 2022 - Reconstruction of the south side of 41st Street starts at Meadow Avenue and progresses to the west.
  • Spring 2022 - Marion Road will be closed south of 41st Street for one month. The detour uses Sertoma Avenue and 57th Street.
  • Summer 2022 - Reconstruction of the north side of 41st Street starts at Meadow Avenue and progresses to the west.
  • Fall 2022 - Marion Road will be closed north of 41st Street for one month. The detour uses Sertoma Avenue and 26th Street.
  • Time frames are all approximate, subject to change, and weather and schedule permitting.

While Marion Road is closed, business access will be open along Larch Avenue and 44th Street.

Pedestrian Routes

2022 Summer to Fall

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

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

Construction is complete 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
Completed Marion Road South of 41st Street (2022)

Marion Road South of 41st Street (2022)

Construction is complete 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
Completed North Side of 41st Street West of I-29 (2022)

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

Construction is complete 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
Completed Marion Road North of 41st Street (2022)

Marion Road North of 41st Street (2022)

Construction is complete 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
? 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
? Signal and Sidewalk at 38th St.

Signal and Sidewalk at 38th St.

Construction is underway at the intersection of 38th Street and Shirley Avenue.

  • Removals

    In Progress
    Completed
  • Electric

    In Progress
    Completed
  • Sidewalk

    In Progress
    Completed
  • Traffic Signal

    In Progress
    Completed
  • Restoration

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

I-29 Interchange Bridge Work (2022-2023)

Construction is underway on the I-29 bridge and interchange.

  • Girders

    In Progress
    Completed
  • Southside Removals

    In Progress
    Completed
  • Southside Rehab & New Construction

    In Progress
    Completed
  • Northside Removals

    In Progress
    Completed
  • Northside Rehab & New Construction

    In Progress
    Completed
  • Electrical

    In Progress
    Completed
  • Closure Pour

    In Progress
    Completed
  • Barriers

    In Progress
    Completed
  • Restoration

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

I-29 Southbound Interchange Work (2022-2023)

Construction is underway on the I-29 interchange.

  • Removals

    In Progress
    Completed
  • Drainage & Sanitary Improvements

    In Progress
    Completed
  • Retaining Walls

    In Progress
    Completed
  • Winterize

    In Progress
    Completed
  • Removals

    In Progress
    Completed
  • West 41st off Ramp & I-29 West on Ramp

    In Progress
    Completed
  • Drainage & Sanitary Improvements

    In Progress
    Completed
  • East 41st St off Ramp & I-29 East on Ramp

    In Progress
    Completed
  • Electrical

    In Progress
    Completed
  • Medians

    In Progress
    Completed
  • Restoration

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

I-29 Northbound Interchange Work (2023)

Construction has not started on the I-29 interchange.

  • Removals

    In Progress
    Completed
  • Drainage & Sanitary Improvements

    In Progress
    Completed
  • Retaining Walls

    In Progress
    Completed
  • East 41st St off Ramp & I-29 East on Ramp

    In Progress
    Completed
  • West 41st St off Ramp & I-29 West on Ramp

    In Progress
    Completed
  • Electrical

    In Progress
    Completed
  • Medians

    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