Deep beneath the bustling city of Cleveland, Ohio, a subterranean world largely unknown to surface dwellers plays a crucial role in keeping winter roads safe: the Whiskey Island salt mine.
Owned by food giant Cargill, this vast operation is a primary supplier of road salt across the Northeast and Great Lakes, regions that have experienced a colder, snowier winter than usual, driving demand to unprecedented levels.
Many municipalities have already depleted their typical winter salt reserves, which usually last well into spring. Cargill spokesperson Emily Tangeman confirmed the intense activity, stating, “Our teams have been working overtime since September to support customers across the snowbelt,” adding that the early and persistent winter weather significantly boosted demand across the entire industry.
Located 1,800 feet (549 meters) underground, the mine beneath Lake Erie is one of the world’s largest, producing between 3 million and 4 million tons (2.7 million to 3.6 million metric tons) annually.
Accessed from Whiskey Island, an industrial area adjacent to downtown Cleveland, the mine opened in the 1960s. Salt is extracted year-round through drilling and blasting within vast tunnels formed from an ancient inland sea that dried up millions of years ago.
Inside, the mine unfolds as a sprawling maze of roughly rectangular caverns, with chalky white walls and ceilings extending for miles. It is dimly lit, often pitch-black beyond the reach of headlamps and floodlights, as heavy machinery rumbles and small ATVs transport miners through the extensive network.
Maintenance superintendent George Campbell noted that operations are continuous, with downtime dedicated to essential upkeep and repairs to maintain steady production.
Cargill is prioritizing shipments to ensure salt reaches the areas of greatest need as winter conditions persist in some regions. Frequent smaller storms also increase usage, requiring repeated salting and creating logistical challenges, Tangeman explained.
With harsher conditions returning across the Eastern U.S., cities like Boston, Bangor, Maine, and Ithaca, New York, have endured their coldest seasons in over a decade. As winter lingers in parts of the country, the Cleveland mine’s work is far from over. Campbell assured that there are still decades of salt reserves available. “I think that we have enough reserves to continue to keep people working for a long time,” he said.
