Increase Atchafalaya Flow to Terrebonne Governor’s Advisory Commission Meeting 7 August 2013 committed to our coast

Coastal Protection and Restoration Authority of Louisiana Master Plan Projects

Coastal Protection and Restoration Authority of Louisiana Dredging of GIWW east of the Atchafalaya River and installation of a bypass structure at the Bayou Boeuf Lock to increase freshwater and sediment flows from the Atchafalaya River to Terrebonne marshes Modeled to maintain a minimum of 20,000 cfs east along the GIWW towards the HNC Included in the 1 st Implementation Period ( ). Engineering and design, construction, and operations and maintenance 50 year budget of $299M. Projected to build, sustain, or maintain square miles of land Master Plan Assumptions Specific Project Details

Study Area Map

Projected Future Land Loss – Master Plan Moderate Scenario

Target Area Map

Coastal Protection and Restoration Authority of Louisiana Purpose: Utilize freshwater and sediment from the Atchafalaya River in order to build, sustain, and maintain wetlands within the Terrebonne Basin Objective 1: Distribute Atchafalaya River resources to the Terrebonne Basin in order to increase the potential to build, sustain, and maintain wetlands Objective 2: Use material dredged from the GIWW as a component of this project to directly create additional wetlands within the project area Need: This project is needed in order to achieve, in part, the goals of the 2012 Louisiana Coastal Master Plan and address hydrologic alterations within the Terrebonne Basin. The lack of both freshwater and sediment inputs due to hydrologic alterations have resulted in increased saltwater intrusion and high subsidence rates, thus significantly contributing to wetland loss within the Basin. Project Specific Purpose and Need

Coastal Protection and Restoration Authority of Louisiana Project Kick Off Site Visit – May 30, 2013 Toured: Bubba Dove Flood Control Structure in the Houma Navigational Canal and potential future Houma Navigational Canal Lock site

Coastal Protection and Restoration Authority of Louisiana Project Kick Off Site Visit – May 30, 2013 Wetlands in the vicinity of Minor’s Canal to Marmande Ridge near Lake Theriot, Lake Decade, Lake Penchant, and Bayou Penchant

Coastal Protection and Restoration Authority of Louisiana Project Kick off Meeting Held – 23 May 2013 Data Gap Analysis Compete – September 2013 Alternatives Formulation, Evaluation, & Comparison - Summer 2013 – Summer 2014 Plan Selection – Summer 2014 DRAFT Project Schedule

Coastal Protection and Restoration Authority of Louisiana Questions/Comments

Coastal Protection and Restoration Authority of Louisiana Master Plan – Increase Atchafalaya Project Potential Marsh Creation Component

Coastal Protection and Restoration Authority of Louisiana Creation of approximately 1,190 acres of marsh along the GIWW in Terrebonne Basin (through sediment dredging of the GIWW) to create new wetland habitat, restore degraded marsh, and reduce wave erosion Included in the 1 st Implementation Period ( ). Engineering and design, construction, and operations and maintenance 50 year budget of $37M. Master Plan Assumptions Specific Project Details