There are a number of Southern US towns that are completely under water after Tennessee Valley Authority and Georgia Power started to dam up the rivers (the one

There are a number of Southern US towns that are completely under water after Tennessee Valley Authority and Georgia Power started to dam up the rivers (the ones that weren't hoisted from their foundations and moved). None are this old or historic though. There are quite a few ancient cities under water, although most from natural chances in sea/river levels than through man made changes to the river.