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I am surprised the dams held out so well. Watched part of a video about Douglas Dam on the Tennessee side? They had all eleven floodgates open for several days, starting before the storm even got there.
Considering those TVA projects were constructed so many decades ago, quite a miracle.
Couldn't agree more.
TVA lakes are at their highest levels in the summer, then they're slowly dropped to their lows in the winter. It's always been that way, and it's done for flood control. Candidly, it doesn't take much rain in the Smokies to affect the lakes in this area. Since more of our precipitation comes in the winter, the lakes are at their lowest. .
Douglas Lake is huge, and the lake levels fluctuate from a high of around 995 feet above sea level in August, to a low of around 950 feet in January. Prior to Helene, Douglas was around 978 feet. As of two or three days ago, Douglas surged to 999 feet above sea level.
We live 'down-stream' from Douglas on Ft. Loudon Lake (the first branch of the Tennessee River). Though we are one hour west of the devastation, I was certain the water levels on Ft. Loudon would soar, since any rains in the mountains always end up at some point in the Tennessee. We barely saw an increase. That said, the TVA dams on the Tennessee River (I think there are 8 or 9 of them before the river terminates into the Ohio), were spilling a tremendous amount of water over the past few days.
Politics aside, the building of the TVA dam system has been a huge benefit when it comes to flood control.