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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.
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 ...
The Mississippi River Basin Model was a large-scale hydraulic model of the entire Mississippi River basin, covering an area of 200 acres. [1] It is part of the Waterways Experiment Station, located near Clinton, Mississippi. The model was built from 1943 to 1966 and in operation from 1949 until 1973.
The Morganza Control Structure portion of the project was completed in 1954. [7] It subsequently became incorporated into the Mississippi River Commission's 1956 project design flood, [9] which added the Old River Control Structure (ORCS) in 1963 to the protections used to prevent Mississippi River flood. [10]
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 ...
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The river is, however, constrained by levees and dikes to control flooding and secure a navigation channel for barges. [3] The Old River Control Structure , the Bonnet Carré Spillway , the Mississippi River – Gulf Outlet Canal and other man-made structures on the lower reaches of the river seek to manipulate the flow of water in the vicinity ...
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 .