A decade after Hurricane Ike devastated the Texas Gulf Coast, the U.S. Army Corps of Engineers announced Friday that a more ambitious version of the proposed “Ike Dike” — a 70-mile-long coastal barrier that could cost as much as $31 billion — is the preferred choice for protecting the state’s coastline from future storm surges.

The option backed by the Army Corps and the Texas General Land Office is similar to the original “Ike Dike” proposal developed by researchers at Texas A&M University in Galveston after Ike hammered southeast Texas in 2008, with some subtle differences.

“This study actually incorporates both coastal storm risk management features and ecosystem restoration features up and down the coast and some coastal storm risk management down on South Padre (Island),” said Kelly Burks-Copes, the project manager for the Army Corps’ study. “It’s a comprehensive study so it’s looking at the entire coast of Texas, much bigger than the Ike Dike per se.”

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System can be leaky – unlike New Orleans. Only needs to hold maximum surge for a few hours. Designed for a 10,000 yr storm. Most Hurricane surges much smaller. Hurricane surge barriers can employ much different designs than river levees which must work of days or even weeks or flood barriers that protect areas below sea level. If the Ike dike leaks the water will just run into Galveston Bay which would act like a very large holding pond.  Source.