The answer is 608', its not hard to find. At 80,000 acres*32'*326,000 gal/acre ft - there is about 834 billion more gallons of water than during 2014 lows.
Thanks.
We'll I guess I didn't answer... sorry. I thought I had posted this link. Looks like you found it.
http://www.swt-wc.usace.army.mil/DENI.lakepage.html
