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Louisiana Sinkhole Swallows Swamp, Leaving Permanent Lake
16 Sep
Summary
- A massive sinkhole formed in August 2012 after a salt cavern breach.
- The collapse transformed a wooded swamp into a 37-acre water-filled depression.
- Hundreds were evacuated, and the community never fully returned after 2016.
A significant land subsidence event occurred near Bayou Corne, Louisiana, on August 3, 2012, when a wooded swamp abruptly collapsed. This incident followed weeks of resident reports detailing unexplained bubbles in the water and persistent tremors. The collapse was officially declared an emergency by the state's commissioner of conservation.
The sinkhole's formation was eventually attributed to a breach in a salt cavern operated by Texas Brine, located beneath the Napoleonville Salt Dome. As material from the surrounding geological formation moved into the cavern, the ground above lost its support, leading to the surface collapse and subsequent expansion.
Initially a smaller opening, the depression rapidly grew, consuming trees and marshland. By 2024, the sinkhole had expanded to approximately 37 acres, becoming a permanent water-filled lake surrounded by damaged vegetation. Gas and water bubble sites were numerous around the affected area, prompting state officials to monitor methane and other emissions.
Concerns about the stability of roads and infrastructure arose due to the ongoing ground movement. A mandatory evacuation order affected hundreds of residents. Although the evacuation was eventually lifted in 2016, the community did not return to its pre-collapse population, leaving the sinkhole as a lasting environmental feature.
