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The Morganza Spillway, a 4,159-foot (1,268 m) controlled spillway using a set of flood gates to control the volume of water entering the Morganza Floodway from the Mississippi River, consists of a concrete weir, two sluice gates, seventeen scour indicators, and 125 gated openings which can allow up to 600,000 cubic feet per second (17,000 cubic metres per second) of water to be diverted from ...
The Morganza to the Gulf Hurricane Protection Project is a flood protection system for Terrebonne Parish and Lafourche Parish in the U.S. state of Louisiana.The targeted area is bounded on the west by Bayou Du Large and LA 311 (Louisiana State Highway 311) and on the east by Bayou Lafourche. [1]
Levee breaches or "crevasses" occurred at Morganza and Grand Levee just downriver in 1850, 1865, 1867, and 1890. The Morganza Spillway, a major flood diversion project of the U.S. Army Corps of Engineers, is located immediately north of the town. Construction on this mammoth work began in 1939 and was completed in 1955.
English: United States Army Corps of Engineers estimated Inundation Map Scenario 1a depicts the anticipated impacts from operation of the Morganza Floodway at 25% of its capacity with full operation of the Bonnet Carre’ Spillway.
The floodway can reduce stress by diverting additional water from the Mississippi into the Atchafalaya. [15] The Morganza Floodway was never used before the construction of Old River Control Structure, and as of 2016 has been opened only twice [16] for flood control since completion of the Old River Control Structure.
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Elliot City was abandoned in 1939 when its residents were forced to leave due to the construction of the Morganza Spillway. This area is inside the floodway levee system and was entirely underwater when the floodway gates at the Morganza control structure were opened in 1973 and 2011 to relieve the high water level of the Mississippi River.