(Buffalo, SD) — The South Dakota Department of Transportation says a contractor is working on bridge deck sealing beginning today. Crews are starting with the U.S. Highway 85 bridge over the South Fork Grand River south of Buffalo. Bridge traffic will be reduced to one lane as workers apply a coating that helps repel water and prevent skids. The sealant will go on the State Highway 75 bridge over the North Grand Fork River next and then the Highway 75 bridge at the South Fork Grand River next.