page_title: Old River Control Structure
hierarchical_section_title: Old River Control Structure
caption_attribution_description: English: The Old River Control Structure at the juncture of the Mississippi River and the Atchafalaya River. In this photograph, the Mississippi River enters from the left and curves away to the right in the distance. The Atchafalaya River meets the Mississippi at three points and runs off to the bottom right. Control structures (dams) at each of the three forks of the Atchafalaya prevent most of the waters of the Mississippi from running into the Atchafalaya. The design of the structures is intended to keep 70% of the water in the Mississippi and 30% flowing into the Atchafalaya. View is to the east-southeast. The control structures are located at river mile 315 on the Mississippi (315 miles from the Gulf of Mexico). On the left of the river in this photograph is Wilkinson County in the State of Mississippi. Concordia Parish, Louisiana is on the right. Français&#160;: La structure de régulation des eaux d'Old River, au défluent du Mississippi et de l'Atchafalaya. Sur cette photographie, le Mississippi coule depuis la gauche vers l'arrière-plan à droite. L'Atchafalaya part du Mississippi depuis trois points et coule vers l'avant-plan à droite. Les ouvrages de régulation (barrages) à chacune des branches de l'Atchafalaya empêchent la plupart des eaux du Mississippi de se déverser dans l'Atchafalaya. Ces structures sont conçues pour conserver 70% du débit dans le Mississippi et 30% dans l'Atchafalaya. La vue est vers l'est-sud-est. Les structures de régulation sont situées au point mile 315 à 506 km en amont de l'embouchure du Mississippi. Sur le côté gauche du Mississippi se trouve le comté de Wilkinson dans l'État du Mississippi. Sur le côté droit se trouve la paroisse de Concordia, en Louisiane.
context_page_description: The Old River Control Structure is a floodgate system in a branch of the Mississippi River in central Louisiana. It regulates the flow of water from the Mississippi into the Atchafalaya River, thereby preventing the Mississippi River from changing course. Completed in 1963, the complex was built by the U.S. Army Corps of Engineers in a side channel of the Mississippi known as "Old River", between the Mississippi's current channel and the Atchafalaya Basin, a former channel of the Mississippi. The Old River Control Structure is a complex containing the original low-sill and overbank 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.
context_section_description: The Old River Control Structure is a floodgate system in a branch of the Mississippi River in central Louisiana.  It regulates the flow of water from the Mississippi into the Atchafalaya River, thereby preventing the Mississippi River from changing course.  Completed in 1963, the complex was built by the U.S. Army Corps of Engineers in a side channel of the Mississippi known as "Old River", between the Mississippi's current channel and the Atchafalaya Basin, a former channel of the Mississippi.  The Old River Control Structure is a complex containing the original low-sill and overbank 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.
caption: The Old River Control Structure complex.  View is to the east-southeast, looking downriver on the Mississippi, with the three dams across channels leading to the Atchafalaya River to the right of the Mississippi. Concordia Parish, Louisiana is in the foreground, on the right, and Wilkinson County, Mississippi, is in the background, across the Mississippi on the left.
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