Thread: Red river

The water flow from the Red River has little effect on the flow in the Atchafalaya River. By federal law, the flow in the Atchafalaya is maintained to 30% of the flow in the Mississippi above the Old River control structure. When the flow in the Red increases the Old River control structure reduces the flow from the Mississippi into the Atchafalaya to keep the Atchafalaya's flow at 30% of the Mississippi's flow.