On the morning of November 20, 1980, Lake Peigneur was a calm, shallow freshwater lake in southern Louisiana — about 10 feet deep, popular with fishermen, bordered by lush botanical gardens. By nightfall, it was something else entirely.
A Texaco crew was drilling an exploratory oil well from a platform on the lake. Deep below the water sat something the drillers knew about but believed they were safely clear of: the Diamond Crystal Salt Mine, a massive underground operation where miners had been carving out salt caverns for decades. Due to what was later determined to be a miscalculation of the drill’s position, the 14-inch drill bit punched through the ceiling of the mine.
At first, it seemed minor. The drilling platform tilted slightly. The crew, sensing something wrong, evacuated to shore. Below the surface, however, lake water was pouring through the borehole into the mine — and as it dissolved the salt walls, the small hole grew into an enormous one.
Then the entire lake began to drain.
A colossal whirlpool formed on the surface, swallowing everything nearby: the $5 million drilling platform, a second rig, eleven barges, a tugboat, trucks, trees, and 65 acres of Jefferson Island, including parts of the beloved botanical gardens. The suction was so powerful that it reversed the flow of the Delcambre Canal, which normally carried the lake’s water to the Gulf of Mexico. Now the Gulf was flowing backward into the crater — creating, briefly, a 164-foot waterfall, the tallest ever to exist in Louisiana.
Meanwhile, 55 miners were underground when the water broke through. Thanks to calm leadership and well-practiced evacuation drills, every single one made it out. The seven-man drilling crew had already reached shore. Even a fisherman caught in the swirling lake managed to get his boat to safety. Astonishingly, no human life was lost.
Days later, once the pressure equalized, nine of the sunken barges popped back up to the surface like bath toys. The lake refilled with water from the canal — but as saltwater, permanently transforming its ecosystem, and now reaching depths of over 200 feet in places.
It remains one of the most jaw-dropping industrial accidents in American history: the day a drill bit the width of a dinner plate drained an entire lake — and somehow, everybody walked away.
