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:

Sept. 18, 2025:

Aug. 15 – Sept. 15, 2025, Completed Work:
Rough grading was completed between 483rd and 485th avenues and on the west half of Phase 3, from the Hudson curve to the south end of the project. The realignment of 297th Street was graded, and the first lifts of gravel were placed. Mainline and approach culverts were installed for Phase 3. Gravel surfacing was placed from the curve to west of 484th Avenue, and interim surfacing was installed from Highway 11 to 482nd Avenue. Topsoil, seed, mulch, and erosion control devices were placed from 482nd to 483rd avenues, and topsoil was placed from the Hudson curve to 484th Avenue.

Anticipated Work Sept. 15 – Oct. 15, 2025:
Finish grading will be completed from 484th to 482nd avenues, followed closely by gravel surfacing. Finish grading and gravel placement will also be completed on the west half of Phase 3. Traffic will then be shifted to the west half so grading and culvert work can begin on the east half. Topsoil placement and erosion control will continue between 483rd and 484th avenues.