However, there was an occasion in which a salt mine itself sucked: this was the Lake Peigneur disaster of November 20, 1980. The setting: Iberia Parish, southwest of New Iberia, in southwest Louisiana.
A Texaco oil rig was digging with a 14 inch drill when it accidentally broke into a salt mine of the Diamond Crystal Salt Company.. As a result, the fresh water of the lake coursed down the hole, filling the enormous salt mine. Fortunately, no human lives were lost; the miners had an effective evacuation plan and were able to leave safely while the rig crew was able to get off before the rig got sucked into the maelstrom.
Previously, the water from the small lake flowed into Vermilion Bay; however, the stream connecting the two temporarily flowed in reverse, resulting in salt water flowing into the lake. This in turn temporarily produced the largest waterfall in the state of Louisiana. Also, the water that coursed down the hole into the salt mine tended to flow outward through the ventilation shafts, producing unLouisiana-like geysers for a time. Here's a video of the event.