(AREA) -- The Michigan Department of Transportation's Bay Region maintenance crews are ready for winter weather. Salt sheds are currently filled with 31,000 tons of salt, with plans in place to purchase an additional 25,000 tons of salt later in the season, if necessary. The Bay Region includes central Michigan and the Thumb. For the 2012-2013 winter season, the Bay Region purchased salt at $46.45 per ton, down from $59.07 per ton last year. The average unit cost for late-season salt purchases this year will be $52.98 per ton. Due to unusually mild weather last year, the Bay Region only used 37,200 tons of salt - down from an average use of 56,600 tons of salt during a normal winter. Statewide, MDOT used 343,000 tons of salt last year - down from 526,000 tons used during the 2011-2012 winter season. In Sanilac County, Road Commission Manager Rob Falls says the county has purchased 1,397 tons of early fill at $43.95 a ton. In 2011, the county paid $59.06 per ton.