S.D. Highway 73 - Kadoka to the White River

Project Summary:

S.D. Highway 73 - From South of the White River to Kadoka

• Grading
• Structure Work
• Interim Surfacing
• Lighting

Project Timeline:

March 2025 - June 2026

Project Updates:

Aug. 27, 2025: 

July 15, 2025 – Aug. 15, 2025, Completed Work:
Unclassified excavation continued south of the White River bridge and in multiple locations to the north. Cold milling of asphalt progressed northbound from the White River. Base course removal and undercut operations continued, including extra undercut in mainline soft spots. Crews worked northward placing and grading new base course, with additional lifts placed on the mainline south of the White River. Installation of RCP pipe and CMP approach pipes continued on both sides of the bridge. The 5’ x 7’ cattle pass was completed on the south end. Waterline tie-ins began, with one remaining that will require a water shutdown.

Anticipated Work Aug. 15, 2025 – Sept. 15, 2025:
The contractor will continue unclassified excavation north of the White River bridge and complete excavation south of the bridge. Cold milling of asphalt on the north side of the river will continue, along with removal of old base course and undercut. Crews will place and grade new base course moving north. Additional RCP and CMP pipe installations are scheduled north of the bridge. The final waterline tie-in, requiring a shutdown, is scheduled for Aug. 19. Final ditch grading will continue to allow for permanent seeding and fence installation.

STATEWIDE CONSTRUCTION PROJECTS PAGE

PCN: 05HV