There is a man made Lake here in Wisconsin that after the lastes raining and flooding disappeard It's gone. There was a roadthat ran over a ditch and with all the rain it had swelled so much so that the water washed away the road, and the ditch is now a small river. The Wisconsin River is 40ft. below the lake and when it burst it only took a few min.and it was gone!!
Lake Dalton is near the Wisconsin Dells if you are familiar with that area.