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Feasibility Study Overview Louisiana Coastal Area Ecosystem Restoration 19 September 2000.

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Presentation on theme: "Feasibility Study Overview Louisiana Coastal Area Ecosystem Restoration 19 September 2000."— Presentation transcript:

1 Feasibility Study Overview Louisiana Coastal Area Ecosystem Restoration 19 September 2000

2 USACE Recon Report:USACE Recon Report: –Supports Coast 2050 Plan –Approved for feasibility study start May 99 General Investigations study authorizationGeneral Investigations study authorization –LCA: 1967 multi-purpose authority –Current use: ecosystem restoration (no B/C ratio) –LA Dept. of Natural Resources non-Fed Sponsor –Feb 00 study start: 50/50 cost share Project authorization and funding vehicle: Water Resources Development Act (WRDA)Project authorization and funding vehicle: Water Resources Development Act (WRDA) Louisiana Coastal Area (LCA) Feasibility Study

3 Mississippi Texas Gulf of Mexico I-10 I-12 Causeway Hwy 1 Hwy 301 Hwy 90 Hwy 46 Hwy 82 Hwy 23 Hwy 1 Mississippi River Bayou Lafourche Hwy 27 Louisiana Red River Atchafalya River GIWW GIWW Louisiana Coastal Area (LCA) Authorized Study Area

4 DNR/COE PartneringDNR/COE Partnering –Executive Committee –Senior Management Committee –Project Management Committee Multi-agency and stakeholder representationMulti-agency and stakeholder representation –Technical Advisory Committee Study Data and Information ManagementStudy Data and Information Management –USGS National Wetlands Research Center (NWRC) LCA Study Organization

5 AgenciesAgencies –FWS, NMFS, WLF, MMS, DNR, EPA, COE LawsLaws –NEPA compliance –F&W Coordination Act –Endangered Species Act –Essential Fish Habitat –Use of U.S. offshore sand resources –Coastal Zone Management LCA Study EIS Partnering

6 Start with Coast 2050 PlanStart with Coast 2050 Plan Develop Purpose and Need Statements for critical strategiesDevelop Purpose and Need Statements for critical strategies Conduct public scoping to shape studyConduct public scoping to shape study Perform data collectionPerform data collection Formulate alternative restoration plansFormulate alternative restoration plans Analyze alternative restoration plansAnalyze alternative restoration plans Compare plansCompare plans Recommendation Plan(s)Recommendation Plan(s) LCA Study Steps -- General

7 DNR/COE organizes/prepares for each stepDNR/COE organizes/prepares for each step –Ensures all facets to conduct work in place –Keeps study on course Conduct Technical Advisory Committee workshopsConduct Technical Advisory Committee workshops –Team interaction on technical level –Shapes study direction Conduct meetings with Barataria-Terrebonne National Estuary ProgramConduct meetings with Barataria-Terrebonne National Estuary Program –Receive valuable input on regional issues –Shapes study direction Conduct public meetingsConduct public meetings –Receive valuable input on public concerns/interests –Shapes study direction LCA Study Interaction Process

8 GIS/Database SupportGIS/Database Support –Reservoir for data/info storage/recall –Analytical tool for organized data/info queries Web Site SupportWeb Site Support –24-hr interface with public Study info postedStudy info posted Receipt of commentsReceipt of comments –24-hr interface with Technical Advisory Committee Draft study data postedDraft study data posted Two-way transfer medium -- technical infoTwo-way transfer medium -- technical info “Going Hi-Tech” with NWRC

9 Approach for Barataria Study Phase I Report: Phase I Report: Focus -- Coastal perimeter:Focus -- Coastal perimeter: –Wetland creation and restoration –Barrier shoreline restoration –River diversion Ecosystem Restoration Objectives:Ecosystem Restoration Objectives: –Rebuild, protect shoreline, back marshes –Provide support to basin interior for restoration

10 Approach for Barataria Study Prep for Phase II Study: Prep for Phase II Study: Develop Hydrodynamic basin modelDevelop Hydrodynamic basin model – Existing conditions Objective:Objective: –Prepare to analyze water-related interior basin strategies

11 Barrier Island Restoration, Marsh Creation, and River Diversion, Barataria Basin R2-16. Dedicated Dredging for Marsh Creation along Hwy. 1 R2-17. Dedicated Dredging for Marsh Building in Caminada Bay R2-11. Delta Building Diversion at Bastian Bay R2-22. Restore/maintain Barrier Shoreline, Port Fourchon to Sandy Point Phase I Study - currentPotential Addition

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13 Alternatives for Investigation Marsh Creation Strategies Marsh Creation Alternatives:Marsh Creation Alternatives: –Dredged materials placement –Terracing –Vegetative Plantings Borrow site alternativesBorrow site alternatives –Adjacent lakes and bays –Offshore Three scales of analysis — each alternativeThree scales of analysis — each alternative

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15 Alternatives for Investigation Barrier Island Restoration Strategy Barrier Island Restoration AlternativesBarrier Island Restoration Alternatives –Dredge and place (e.g. beach, dune, back marsh) –Coastal structures (e.g. breakwaters, groins, revetments, geotubes) Borrow site sand alternativesBorrow site sand alternatives –Ship Shoal –Mississippi River –Barataria Basin ebb-tide shoals and relic distributaries Three scales of analysis — each alternativeThree scales of analysis — each alternative

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17 Alternatives for Investigation Diversion Strategy Location on lower riverLocation on lower river Converge LCA Study with prior study workConverge LCA Study with prior study work –Miss. River Sediment, Nutrient, and Freshwater Redistribution Study (MRSNFR) –Barrier Shoreline Feasibility Study (BSFS)

18 Data collection nearing completionData collection nearing completion Early stage of planning plan formulation workshopsEarly stage of planning plan formulation workshops Study Status Barataria Basin Phase I Early stage of initiating model development for existing conditionsEarly stage of initiating model development for existing conditions Barataria Basin Phase II

19 Study Website:

20 Barataria Basin Study Strategies R2-10. Delta Building Diversion at Myrtle Grove R2-1. Small River Diversion R2-6. Enrich Existing Diversions with Sediment R2-19. Gap Spoil Banks/Plug Canals in Lower Bay Marshes R2-16. Dedicated Dredging for Marsh Creation along Hwy. 1 R2-24. Preserve Land Bridge R2-8 Small Diversions Phase II Study R2-17. Dedicated Dredging for Marsh Building in Caminada Bay R2-11. Delta Building Diversion at Bastion Bay R2-2. Restore Natural Drainage Patterns R2-3b. Remove Flood Waters from the Upper Basin R2-22. Restore/maintain Barrier Shoreline, Port Fourchon to Sandy Point R2-9. Sediment Trap for Marsh Creation R2-4. Divert Through Existing Locks R2-5. Manage Outfall of Existing Diversions R2-25. Maintain Shoreline Integrity R2-26. Dedicated Dredging Phase I Study - current R2-3a. Provide Diversion Related Flood Protection R2-23. Extend Barrier Shoreline, Sandy Point to Southwest Pass Phase I Study - to be added R2-20. Wave Absorbers and Reef Zone (R2-1) R2-18. Parallel Conveyance Channel and Delta Lobe


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