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The Old River Control Structure is a complex containing the original low-sill [6] and overbank [7] structures, as well as the auxiliary structure that was constructed after the low-sill structure was damaged during the Mississippi River Flood of 1973. The complex also contains a navigation lock and the Sidney A. Murray Jr. Hydroelectric Station.
It was designed to rely on the Mississippi River's natural flow and elevation drop at the Old River Control Structure, therefore not needing a large impound dam. It was also built in accordance with the U.S. Army Corps of Engineers existing water management objective with minimal impacts on the surrounding environment.
The last use was in 1973, when a potentially catastrophic failure arose at the Old River Control Structure. The model was used to show that the untested Morganza Spillway could be opened effectively, without diverting polluted water through New Orleans and Baton Rouge, as well as identifying levees that required topping up.
Formation of the Atchafalaya River and construction of the Old River Control Structure. The river is formed near Simmesport at the confluence of the Red River with the Mississippi, where the Mississippi connects to the Red River by the 7-mile-long (11 km) canalized Old River (part of the Old River Control Structure). It receives 30% of the ...
The Old River Control Structure, a dam which regulates the outflow from the Mississippi into the Atchafalaya, was completed by the Army Corps of Engineers in 1963. The dam is intended to prevent the Atchafalaya from capturing the main flow of the Mississippi and stranding the ports of Baton Rouge and New Orleans .
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. [8] The control structure, located between the towns of Montz and Norco , is a mechanically controlled concrete weir that extends for over a mile and a ...
Old River Control Structure, connecting the Red River to the Atchafalaya and Mississippi Rivers Topics referred to by the same term This disambiguation page lists articles about distinct geographical locations with the same name.
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 ...