the worst that's happened here.
Check out Lake Peigneur (pronounced: pin-yur)only about 100 miles from there back in 1980.
While it's not impossible that the Bayou Corne sinkole could end up like Lake Peigneur, the situation is somewhat different. #1, the salt dome is not an operating mine, but rather the salt was pumped out with the intention of storing chemicals in the salt cavity. There is thus not a large pressure gap or "void" to be filled.
Also the sinkhole is on land, though marshy. It is not directly connected to a body of water. The nearest is Bayou Corne itself, which is about 1500' away, the nearest houses are nearly 2000' away.(http://classic.edsuite.com/proposals/proposals_280/distance_...)
I could be wrong, but I think at present, the sinkhole is not growing towards the bayou.
If it did, it might merely drain Bayou Corne from further north, into it until it stablized, and not drain Lake Verret which is due south, or the Gulf. The path to the Gulf is much longer here than Lake Piegneur is.
Only time will tell I guess.
I think at present, the State is trying to work out buying up residential property that is considered 'at risk.'