West Atchafalaya Floodway West Atchafalaya Floodway The West Atchafalaya Floodway is a flood control structure of the Mississippi River and Tributaries Project located in the Lower Atchafalaya Basin in south-central Louisiana. It has a project design flood flow capacity of . The Atchafalaya Basin system comprises three floodways. Two of these, the West Atchafalaya Floodway and the Morganza Floodway, are at the northern end. Together with the Atchafalaya River, these floodways are designed to pass flood waters into the third component, the Lower Atchafalaya Basin Floodway, which is in size and is bounded on the north by U.S. Route 190, on the east
Morganza to the Gulf benefits to the marshes and wetlands in the Terrebonne Basin. Safe Harbor: Fishermen will no longer have to leave the area in a storm event. A Reconnaissance Study for the Morganza, Louisiana to the Gulf of Mexico Hurricane Protection Project was authorized by Congress in 1992. Following completion of this report, the United States Congress authorized a Feasibility Study in the Energy and Water Development Appropriations Act of 1995 (Public Law 103-316). The Feasibility Study was completed in March 2002 and the Chief of Engineers letter was forwarded to the Secretary of the Army in August 2002 and supplemented in