A massive, growing sinkhole in Louisiana reveals the hidden dangers of salt mining

Nature · Published 3 October 2026 Swipe more like this →

In short: In 2012, a Louisiana community faced a surreal catastrophe: the ground began to shake and bubbles erupted from the water. A massive cavern had collapsed, creating a sinkhole that swallowed trees and dirt. This industrial disaster, largely ignored by the public, highlights the risks of exploiting ancient underground salt domes.

Beneath the bayous of Louisiana lie gigantic salt domes, remnants from the formation of the North American continent. These geological features, sometimes five miles wide and buried 15,000 feet deep, have been exploited for centuries. In the 20th century, the government began utilizing these hollowed-out salt caverns as reservoirs for crude oil storage. However, the intersection of mining and petroleum engineering requires extreme precision to maintain stability, as evidenced by the 1980 disaster at Lake Peigneur.

The Bayou Corne incident originated in the Napoleonville Dome, which contained 53 distinct caverns. One specific cavern, known as Oxy3, was situated less than 100 feet from a nearby oil and gas storage sheath. Despite unsatisfactory pressure tests in 2010, the operator, Texas Brine, proceeded with expansion plans. By June 2012, residents reported seismic activity and gas bubbles. On August 3, 2012, a sinkhole appeared, forcing the evacuation of 350 people. The collapse allowed sediment to pour into the cavern while oil and gas escaped to the surface.

The sinkhole grew from an initial 2.5 acres to 37 acres by 2024. Legal battles followed, with a 2018 court ruling assigning 50% of the fault to Occidental Chemical, 35% to Texas Brine, and 15% to Vulcan. While a $48.1 million class-action settlement was proposed, the community remains fractured. By 2020, only 32 residents remained in the town. The long-term ecological impact on the surrounding flora and fauna remains unstudied, leaving the area in a state of environmental uncertainty.

The incident serves as a stark reminder of the risks associated with industrial activity near geological formations under immense pressure. As environmental advocates have noted, the area remains deeply contaminated. Despite attempts to mitigate the damage, including burning off millions of cubic feet of gas and proposals to discharge wastewater into the site, the sinkhole stands as a significant, ongoing industrial disaster that continues to reshape the landscape of Assumption Parish.

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