Hydrologic Restoration

Increase Atchafalaya Flow into Terrebonne Marshes

  • Project TypeFreshwater Diversion, Hydrologic Restoration
  • Project BasinTerrebonne-Atchafalaya Basin
  • ParishLafourche, St. Mary, Terrebonne

This hydrologic diversion project stretches from the Atchafalaya River to the Houma Navigation Canal, which is part of the Gulf Intracoastal Waterway system. The marshes in the influence area are nearly equidistant between the Mississippi and Atchafalaya rivers and are blocked from significant amounts of river water and sediment. As a result of saltwater intrusion and sediment starvation, these marshes have been rapidly converted to open water. This project would dredge and deepen the Gulf Intracoastal Waterway to increase the flow of fresh water from the Atchafalaya River, to help sustain Terrebonne Marsh.