S.D. Highway 28 East of Estelline to S.D. Highway 15

Project Summary:

The project will replace and upgrade all drainage structures leading to improved drainage. The project will be fully regraded cutting hills and filling valleys leading to improved sight distance. The project will include adding shoulder width to the segment.

Drainage Upgrades
Grading
Shoulder Widening

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Project Timeline:

April 2025 - Nov. 2025

Detour Map:

Project Updates:

Aug. 22, 2025:

July 15, 2025 – Aug. 15, 2025, Completed Work:

Grading was completed between 469th Avenue and Peg Mucky Run Bridge Exception.
Pipe placement and most rough grading were finished between Peg Mucky Run Bridge Exception and Estelline, with some borrow topping remaining.
Ditch work in this section is delayed until water recedes.
Grading began on the east end of the project from the SD 15 junction.

Anticipated Work Aug. 15, 2025 – Sept. 15, 2025:

Finish pipe placement and borrow topping between the SD 15 junction and 1.5 miles west.
Begin final grading in early September from I-29 to 474th Avenue.
Continue salvage gravel placement on completed grading sections.
Complete seeding and mulching once conditions are dry enough.
Temporary surfacing on completed gravel sections is expected in mid-September.

Project Photos:

Project Contract Amount:

$10.4 Million

Project Contacts:

SDDOT:
Bryce Olson
605-881-7149

Watertown Area Office:
605-882-5166

Contractor:
Bowes Construction
Cole Schneider
605-695-3839

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PCN: 04HM

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