Too close for comfort

If the Morganza Floodway is not opened to funnel 300,000 cubic feet per second of water from the Mississippi River into the Atchafalaya River basin, the additional water could cause levees to fail along the river from Morganza to Plaquemines Parish, including all of the New Orleans area, resulting in as much as 25 feet of floodwater.

The National Weather Service has predicted that at its crest, 1.9 million cubic feet per second of water will flow past the Red River Landing if the floodway is not opened. That would result in a crest of 19.5 feet at the Carrollton Gauge in New Orleans, which is 2.5 feet above official flood stage and just 6 inches below the top of floodwalls. "With a stage at Carrollton of 19.5 feet, we would have to close most of the floodgates along the Mississippi River levee within our jurisdiction," he said. "The port, Public Belt Railroad, recreational areas like the Audubon Aquarium and the Butterfly Park would have to close."