I’ve been kind of obsessed with the level of Lake Lanier since the media made such a big deal about it last year or so and said it could run out of water completely, or that they might have to use dead zone water that was stored there since the beginning and completely out of oxygen. None of that ever happened and the lake is actually up 10 feet from last November. In fact, just this week it was announced that the drought is over.
Though the amount of water per inch of lake varies, an article from the AJC in January said that 1 foot of Lake Lanier is equal to 10 billion gallons of water and could supply Atlanta for 25 days. That article also said that Lake Lanier holds five times as much water as Lake Allatoona, which is now full.
Part of the problem with the water level was due to a bad gauge at the lake which led people at the dam to release billions of gallons of water, or about 2 feet.