No, the media says they are 13 feet, but that was a figure before the subsequent settling, and they are vague about what the current figure is. Maybe your website has the current figures, about 10 feet it seems.
"No, the media says they are 13 feet"
I thought I heard they were 15 feet but have settled to more like 13 feet.
Army Corp maps show a low of 11' on the west side (by the airport), and varying between 18' and 13' along the lake, which would suggest that those numbers take into account subsidence.
Looks like they are ok for a direct surge up to 13', but a track where the winds are from the north on the west side could pile water up against that 11' levee.