Rock Products Logo
Now Incorporating Aggregates Manager




Help Rock Products understand the state of the industry and the needs of our readers by completing our annual Reader Survey.

It only takes 10 minutes and your answers will help guide us as we plan our content for the upcoming years.

Start Survey


Great Lakes Limestone Trade Up Nearly 4 Percent in September

Shipments of limestone on the Great Lakes totaled 3.6 million tons in September, an increase of 3.7 percent compared to a year ago, according to the Lake Carriers’ Association. Limestone cargos also bettered the month’s five-year average by 8 percent.

Loadings from U.S. quarries totaled 2.9 million tons, an increase of 1.8 percent, or 54,000 tons compared to a year ago. Shipments from Canadian quarries totaled 685,000 tons, an increase of 12.4 percent, or 76,000 tons.

Year-to-date the limestone trade stands at 20.8 million tons, an increase of 3.6 percent compared to a year ago. Loadings from Michigan and Ohio quarries total 17 million tons, an increase of 3.1 percent. Shipments from Ontario quarries total 3.8 million tons, an increase 5.8 percent.