Canton - U.S. Highway 18 to Interstate 29

Project Summary:
Located east of Interstate 29 at exit 62, U.S. Highway 18 connects the city of Canton to Interstate 29 with a two-lane undivided rural highway. This stretch of Highway 18 has shown increased traffic volumes in which the current two-lane highway is reaching capacity. This eight-mile segment will be reconstructed with a four-lane divided highway to accommodate the increased traffic volumes. Additionally, this project includes the replacement of existing box culverts which are sized appropriately based on watershed information.
The project includes grading, curb and gutter, storm sewer, box culvert replacement, lighting, permanent signing, pavement marking, and surfacing.
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Project Timeline:
Summer 2023 - Summer 2025
Project Updates:
Sept. 17, 2025:
Aug. 15 – Sept. 15, 2025, Completed Work:
Colored concrete along the median was completed. Pavement markings and permanent sign installation continued.
Anticipated Work Sept. 15 – Oct. 15, 2025:
Crews will continue installing permanent markings and signs. Final punch-list items will be addressed, and project cleanup will continue.
Project Photos:
Project Contract Amount:
$45.6 Million
Project Contacts:
Contractor:
Reede Construction Inc.
Brett Aadson 605-971-0922
SDDOT:
Ryan Story 605-940-0721
Spencer Thompson 605-201-0535
© 2025 State of South Dakota. All Rights Reserved.
Becker-Hansen Building
700 E. Broadway Ave.
Pierre, SD 57501
Modern Logic
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© 2025 State of South Dakota. All Rights Reserved.
Becker-Hansen Building
700 E. Broadway Ave.
Pierre, SD 57501
Modern Logic