S.D. Highway 46 - From Beresford to Iowa State Line

Project Summary:

This project is a fifteen-and-one-half mile-long full reconstruction of S.D. Highway 46 in Union and Lincoln Counties. The project begins at the east edge of the city of Beresford and ends at the Iowa state line. Work on this project will consist of full roadway grading, structure replacement, culvert replacement, interim surfacing, and new permanent signing.

Construction is broken into three phases and covers two construction seasons.

Phase one starts at the east edge of Beresford and ends at the S.D. Highway 11/S.D. Highway 46 intersection. Work in phase one will be completed during the 2024 season with an interim completion date of Nov. 2024.

Phase two will be from the Highway 11/ Highway 46 intersection to the Hudson curve.

Phase three will be completed under traffic from the Hudson curve to the Iowa state line. Phase two and three will be completed during the 2025 construction season.

During construction, the highway will be closed to through traffic. Access to residents and landowners adjacent to the project will be maintained, but travelers are encouraged to use the signed detour route around the project. The detour route around the project for phase one includes Interstate 29 to Lincoln County 152 and Highway 11. Phase two detour includes Highway 11 to Lincoln Co 152 and Lincoln Co 143. Phase three will be completed under traffic using temporary widening.

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Project Timeline:

Spring 2024 - Nov. 2025

Project Updates:

June 15, 2025 – July 15, 2025, Completed Work: The precast box culvert east of Hwy 11 has been set and the cast in place box culvert between 483rd and 484th Ave has been backfilled. All but 2 highway culverts have been completed between 482nd and 485th Ave. Rough grade of the road top is completed between 482nd and 483rd Ave. Topsoil has been placed from Hwy 11 to just east of 481st Ave with temporary seed and mulching completed. 2 lifts of gravel have been completed to 482nd Ave.

Anticipated work July 15, 2025 – Aug. 15, 2025: The 3rd lift of gravel will be completed to 482nd Ave then the contractor will begin truck hauling ditch cut from the mile between 482nd and 483rd to complete the gap left in the grading between 480th and 481st Ave and backfill the precast box east of Hwy 11. Approach pipes will be installed and approaches constructed after ditches have been graded. Interim surfacing will be applied after the gravel is complete on the 3 miles east of hwy 11. Rough grading will continue from east to west starting with the realignment of the Hudson curve and 297th St. Work has started on the new box culvert just east of 484th Ave.