Laborde Products powered the newbuild M/V Larry Gravely, constructed by Diversified Marine in Houma, Louisiana.The twin-screw towboat is equipped with a pair of Mitsubishi Tier 3 S6R2 main engines, each rated at 803 horsepower at 1,400 RPM. The engines were applied to support the vessel’s operating profile and the steady, day-to-day demands of aggregate service on the inland waterways.
Limestone shipments on the Great Lakes totaled 26.6 million tons in 2025, a decrease of 5.9 percent compared to the previous year. 2025’s loadings were below the trade’s 5-year average by 6.7 percent.Shipments from U.S. quarries decreased 5 percent from 2024 to 21.7 million tons. Loadings from U.S. quarries were also 5 percent below their 5-year average.
Shipments of limestone on the Great Lakes totaled 3.2 million tons in October, a decrease of 3.8 percent compared to 2024. Limestone cargos were also below the month’s 5-year average by 10.7 percent.Loadings from U.S. quarries totaled 2.6 million tons, a 6.1 percent reduction. Shipments from Canadian quarries increased 6.8 percent to 626,805 tons.Year-to-date, the limestone trade stands at 22.