The Lake Peigneur drainage incident
GeographyComments
The 1980 reports suggested the salt mine was already partially depleted. I suspect the seawater transition was less of a 'replacement' and more of a slow, salty bleed.
This brings up the current stability of other abandoned salt domes... I wonder if modern sonar mapping has actually solved this or if we're just better at ignoring the risks... it feels like a huge oversight for current coastal zoning.
Do those Midwest sinkholes involve subterranean salt deposits, or are they primarily karst topography?
The cost of the dredging operations provides a more concrete sense of the scale than the 'surreal' descriptions. Moving that much debris in a saltwater environment is a mechanical nightmare that usually bankrupts local contractors.
The summary omits that the rig was positioned using a map that had a fundamental coordinate error. The drilling didn't just happen to hit the mine; it was targeted at the wrong spot because of a surveying mistake.
Suppose the coordinates had been accurate. Would the structural integrity of the salt dome have held under the weight of the rig, or was a breach inevitable given the depth?
Actually, I would argue it wasn't a 'surveying mistake' in the general sense. The issue was specifically a mismatch between the mine's internal coordinate system and the surface grid used by the drillers.