<Li> The London Avenue Canal in the Gentilly neighborhood breached on both sides--on the west side near Robert E. Lee Boulevard and on the east near the Mirabeau Avenue Bridge </Li> <P> Storm surge caused breaches in 20 places on the Mississippi River - Gulf Outlet Canal ("MR - GO") in Saint Bernard Parish, flooding the entire parish and the East Bank of Plaquemines Parish . </P> <P> The original residents of New Orleans settled on the high ground along the Mississippi River . Later developments eventually extended to nearby Lake Pontchartrain, built upon fill to bring them above the average lake level . Navigable commercial waterways extended from the lake to downtown . After 1940, the state decided to close those waterways following the completion of a new Industrial Canal for waterborne commerce . Closure of the waterways resulted in a drastic lowering of the water table by the city's drainage system, causing some areas to settle by up to 8 feet (2 m) due to the compacting and desiccation of the underlying organic soils . </P> <P> After the Great Mississippi Flood of 1927, Congress passed the Flood Control Act of 1928 which authorized the Corps of Engineers to design and construct flood control structures, along with levees, on the Mississippi River to protect populated areas from floods . It also affirmed the principle of local participation in federally funded projects but acknowledged that the $292 million already spent by local interests was sufficient to cover local participatory costs . It is instructive to note that, in addition, sovereign immunity was given to the Corps of Engineers under Section 3 of the Flood Control Act of 1928, which states "no liability of any kind would attach or rest upon the United States for any damage from or by floods or flood waters at any place, provided that if on any stretch of the banks of the Mississippi River it was impracticable to construct levees ." 33 U.S.C. § 702c . Section 702c is sometimes referred as "Section 3 of the act," based on where it appears in the public law . </P>

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