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Every Google search I can think of links only to the Palast story or someone commenting on it. Anyone have a link to a story about this appeal?
Palast, as usual, is part right, part hyperbole about Katrina. A lot of damage was caused by the Mississippi River-Gulf Outlet. All the flooding in the Lower Ninth and the Ninth Wards and much of it in St. Bernard Parish were because of MR-GO. The worst levee break--the one some people thought was blown, on the edge of the Lower Ninth--was because of the MR-GO, where it emptied into another large canal, the Industrial Seaway, which connects the lake and the river. Just where MR-GO enters the canal the levee broke, destroying the Lower Ninth Ward--which was already flooding from the topped levees along MR-GO. The canal probably didn't even have to be filled in to prevent the damage, if there had been an effective flood gate to keep the storm surge out of it, and/or if the levees along the MR-GO itself had been built for Category 5 hurricanes. The flooding from MR-GO wasn't a surprise, either, since other hurricanes, like Betsy in 65, did the same thing.
But Katrina didn't miss New Orleans. The eye may have, but the northwest quadrant hit New Orleans. New Orleans East and the shore of Lake Pontchartrain flooded, not because of MR-GO, but because the storm surge entered the lake and topped the outdated and undersized levees. That same surge destroyed the Twin Spans between NOLA and Slidell, nowhere near MR-GO. The lawyer he mentions wasn't flooded because of MR-GO, but because of the levees along Lake Pontchartrain, most likely.
Further, the rain and the flooding from all fronts overpowered the outdated and poorly maintained pumping stations of New Orleans. New Orleans is low-lying (it's not all below sea level, contrary to rumors), and needs pumps to pump rain water into a series of canals that empty into the lake. The pumps failed, and then some of the levees along the canals failed, notably the 17th Street Canal. Since New Orleans is low lying, and the Lake was overfull from the storm surge (it's slower to empty than to fill) and from flooding of streams that empty into it further inland, the lake flowed through the openings in the canal levees until the water in the lake was even with the water in New Orleans--that equalization came with most of New Orleans under water, stopping just short of the French Quarters.
If no levees had failed, and if all levees had been built to withstand a Category 5, most of the flooding wouldn't have happened. Metairie, right on the other side of the 17th Street Canal, was barely touched, since the levee only broke on the NOLA side. Algiers, across the River, was barely touched. It was the failure of the levees that killed New Orleans, but it wasn't just MR-GO.
And it wasn't just a mild rainstorm that broke the levees. Katrina was still a Category 3 with an unprecedented storm surge where it entered Lake Pontchartrain and struck New Orleans East. In New Orleans proper, it was probably only a Category 1, but the storm surge topping the levees along the lake and rushing up MR-GO were generated by the full force of the hurricane.
Another failure of the Army Corp and of government in general was in the wetlands. For forty years, the wetlands have been systematically destroyed by the oil industry and by population growth. Wetlands reduce a storm surge by a about half a foot every two miles. Ten more miles of wetlands might have kept the surge from topping the levees. When Camille, a much stronger hurricane, followed the same path, it had a 22 foot storm surge, which at the time was unprecedented, and was seen as the limit for how high a storm surge could go. Growing up there, we were always told that a 30 foot storm surge--while often rumored--was impossible, or Camille would have done it. With the destruction of the wetlands, the surge had less to slow it down, and perhaps that played a role in the damage even to Mississippi (although there may have been other factors in the unprecedented surge, too).
Anyway, I'd love to know what Obama is thinking, too.
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