This might sound insane, but the great lakes might work, with a joint Canada-US plan. Raising one of them by a foot would be all you'd need because their area is so huge.

If you're willing to look outside the US, a wild but interesting mega project might be to try to do the same thing with the South Aral Sea. Pump water all the way from the Caspian. The North Aral is cut off by a dam/dyke and the south Aral barely exists anymore, causing major economic harm. Fill it with salt water and salt water fish to revive the fishing economy while using it as a giant battery.