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[quote]QUOTE: Originally posted by Mookie geology question here: When you mine out all that coal - it leaves a hole, does it not? How does this affect the surrounding territory? And what will be the long term effect on the geology of that entire region? [/quote] Each mine has to go through a reclamation process. The overburden that was stripped off to get to the coal seam is returned and the pit to some extent is filled. Im sure they have to add more overburn if its a bigger pit, but Im not positive. The mine usually has to plant native grasses and trees and so forth to make it look as natural as possible to the surrounding area. In other words when you look at one of these reclaimed areas, you wouldnt think it was an old mine in its previous life. I also think that some old mines have been turned into lakes and reservoirs. I recall hearing something on WGN that Chicago is using 3 old open pit mines to store storm water. There hoping this would help with curing Chicago's flooding problem. Also isent there an old mine, forgot where, that is now a PGA golf course? Im not sure if all pits have to be reclaimed as in old ones that havent seen decades of work. I think these are what the government calls "superfund" sites. But I do know that all new mines have to have a reclamation plan before ever starting up. Hope this helps. Steve
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