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:

May 15, 2025 – June 15, 2025, Completed Work: Finish grading and gravel placement has been completed from S.D. Highway 11 to just east of 480th Avenue. Topsoil placement has been completed for the same area. All pipe culvert work from Highway 11 to 482nd Avenue has been completed, and approaches have been constructed. The precast box between 480th and 481st Avenue has been installed and the last concrete pour on the cast in place box between 483rd and 484th Avenue has been completed. In place surfacing has been removed to 485th Avenue.

Anticipated work June 15, 2025 – July 15, 2025: Finish grading will continue from 480th to 482nd Avenue with gravel and topsoil following close behind. Seeding and erosion control work will begin at Highway 11 and work east following the topsoil placement. Rough grading will continue from 482nd Avenue to 485th Avenue. Mainline culverts will be installed with the grading operations. The new precast box culvert just east of Highway 11 will be installed, backfilled, and road top graveled. The cast in place box culvert just west of 484th Avenue will be backfilled. Work will begin on the next box culvert replacement just east of 484th Avenue.