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LCA Medium Diversion at Myrtle Grove Study Update

LCA Medium Diversion at Myrtle Grove Study Update. Governor’s Advisory Commission on Coastal Protection, Restoration, and Conservation December 5, 2012. LCA Study Goal & Objectives. Goal: Use river resources (diversion and dedicated dredging) to increase wetlands quantity and quality

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LCA Medium Diversion at Myrtle Grove Study Update

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  1. LCA Medium Diversion at Myrtle Grove Study Update Governor’s Advisory Commission on Coastal Protection, Restoration, and Conservation December 5, 2012

  2. LCA Study Goal & Objectives • Goal: • Use river resources (diversion and dedicated dredging) to increase wetlands quantity and quality • Objectives: • Establish geomorphic connection from the river to the estuary to introduce sediments to build and sustain wetlands • Deposit and retain riverine resources to maintain marsh over the 50-year period of analysis

  3. LCA Myrtle Grove StudyCurrent Activities • Hydrodynamic modeling • Initiate alternatives modeling in January 2013 • Consider 15,000 to 125,000 cfs alternatives • Dedicated dredging component • Determine benefits • Assess impacts • Induced flooding in receiving basin • Cumulative effects of diversion on navigation • Effects of changes in salinity/turbidity to aquatic species • Effects of diversion on Gulf hypoxia • Potential for “scouring” the receiving area • Effects of nutrient rich river water on basin water quality

  4. LCA Myrtle Grove StudySchedule • Tentatively Selected Plan (TSP) – July 2013 • Complete Draft EIS – Dec 2013 • Alternative Formulation Briefing (AFB) – Dec 2013 • Chef’s Report – Dec 2014

  5. CPRA “Dual Path” Approach • USACE advancing LCA Myrtle Grove Study IAWFCSA • CPRA advancing design of the Mid-Barataria Diversion • Early/continual coordination with USACE Regulatory is critical • Establish requirements/expectations for permit application • Section 10 of the Rivers and Harbors Act • Section 404 of the Clean Water Act • Section 408 process – will be a major modification to Federal system • Requirements of other Federal agencies/key stakeholders • First meeting between State contractor and USACE Regulatory scheduled for Dec 6 • USACE Regulatory and Civil Works coordinating LCA and CPRA efforts

  6. CPRA “Dual Path” Approach Implications for LCA study • CPRA Mid-Barataria Diversion design effort will be evaluated under the LCA study • Timing of critical State actions • Could impact Federal interest • Selection of LCA recommended plan not to be influenced by CPRA design effort • CPRA design efforts are not currently eligible for LCAWIK credit

  7. Ram Terminals Permit Application • Permit application submitted to USACE • USACE review on-going • USACE awaiting additional information from applicant

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