Hydrologic Restoration

Increase Atchafalaya Flow into Terrebonne Marshes

  • Project TypeHydrologic Restoration
  • Project BasinTerrebonne-Atchafalaya Basin

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 an equal distance from the Mississippi and Atchafalaya rivers and are blocked from significant amounts of river water and sediment. These marshes have been rapidly converted to open water because of saltwater intrusion and sediment starvation. This project would dredge and deepen a portion of the Gulf Intracoastal Waterway to increase the flow of fresh water from the Atchafalaya River to help sustain Terrebonne marsh. Additional benefits from this project include using the dredged material to create marsh and increase flow capacity using two southern-flowing canals (Minor’s and Bayou Copasaw.)