Shipments of limestone on the Great Lakes totaled 3.6 million tons in July, a decrease of 14.3% compared to a year ago, according to latst figures from industry trade group the Lake Carriers’ Association (LCA). The trade was also below the month’s five-year average by 9.3%.Loadings from U.S.<p><p>https://www.marinelink.com/news/great-lakes-limestone-trade-down-july-515928</p></p>