Shipments of limestone on the Great Lakes totaled 3.9 million tons in May, an increase of 33.9 percent compared to one year ago. May’s loadings were also above the month’s five-year average by 6 percent. 

Loadings from U.S. quarries increased 42.2 percent compared to 2023 to 3.2 million tons. Shipments from Canadian quarries totaled 734,489 tons, an increase of 7.2 percent. 

Year-to-date the Lakes limestone trade stands at 6.5 million tons, an increase of 30.9 percent compared to a year ago. Loadings from Michigan and Ohio quarries total 5.3 million tons, an increase of 33.7 percent. Shipments from Ontario quarries increased 19.8 percent to 1.2 million tons.