[freebeard]

rmay635703 —
https://en.wikipedia.org/wiki/Bayou_Corne_sinkhole

Bayou Corne was being used for natural gas storage:

The ecological effects of these developments on local flora and fauna are yet unstudied, but the sinkhole continues to destroy nearby cypress trees, swallowing them during expansion. The Atlantic’s Tim Murphy has summarized the incident thusly: “Bayou Corne is the biggest ongoing industrial disaster in the United States you haven't heard of.” One class-action lawsuit led to a proposed $48.1 million settlement in 2014, although some residents felt that the legal fees to be awarded ($12.03 million) were too high a percentage of the total.

https://en.wikipedia.org/wiki/Lake_Peigneur

Lake Peigneur also involved a salt dome, but they were drilling for oil.

The resultant whirlpool sucked in the drilling platform, eleven barges, many trees and 65 acres (26 ha) of the surrounding terrain. So much water drained into those caverns that the flow of the Delcambre Canal that usually empties the lake into Vermilion Bay was reversed, making the canal a temporary inlet. This backflow created, for a few days, the tallest waterfall ever in the state of Louisiana, at 164 feet (50 m), as the lake refilled with salt water from the Delcambre Canal and Vermilion Bay. Air displaced by the water flowing into the mine caverns erupted through the mineshafts as compressed air and then later as 400-foot (120 m) geysers.