Bonnet Carré Spillway until 1883. The Bonnet Carré Spillway consists of two basic components: a control structure along the east bank of the Mississippi River and a floodway that transfers the diverted flood waters to the lake. The control structure is a mechanically-controlled concrete weir that extends for over a mile and a half parallel to the river. When opened, the control structure allows overflow volume to flow into Lake Pontchartrain. The lake's opening to the gulf is sufficient to absorb and dissipate any conceivable volume of flood flow. Thus, the flood surcharge portion of the water from the Mississippi is divided between
Morganza to the Gulf the inspiration for Isle de Charles Doucet in the 2012 film Beasts of the Southern Wild. Morganza to the Gulf 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. The U.S. Army Corps of Engineers is the federal sponsor for this project, and the Louisiana Department of Transportation and Development with the Terrebonne Levee and Conservation District jointly