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San Francisco LTMS : Accomplisments And New Challenges PowerPoint Presentation
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San Francisco LTMS : Accomplisments And New Challenges

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  1. San Francisco LTMS: Accomplisments And New Challenges SFBJV, March 29, 2011

  2. Origin of the LTMS The San Francisco Estuary Project’s CCMP • Five Key Challenges Facing the Estuary: • Decline of biological resources (especially wetlands and related habitats) • Increased pollution • Freshwater diversions and altered flow regime • Intensified land use and population • Dredging and waterway modification • The San Francisco Bay LTMS • Implementing arm of the CCMP for Dredging and Waterway Modification

  3. The LTMS Goals • Maintain…those channels necessary for navigation…and eliminate unnecessary dredging • Conduct dredged material disposal in the most environmentally sound manner • Maximize use of dredged material as a resource • Establish a cooperative permitting framework

  4. The LTMS Plan Minimize In-Bay Disposal Maximize Beneficial Reuse Percent of all Disposal Plan

  5. Initial: LTMS annual limit less than 1/2 previous limits Long-term Goal How To Get There Step 2: 12-Year Transition Period Systematically Reduces In-Bay Disposal 1/1/10: Annual limit reduced by another 1,135,500 cy

  6. How Are We Doing? The LTMS Transition is On Track • In-Bay Disposal • Significantly reduced: disposal limits have been met every year • Mostly done successfully within Environmental Work Windows • Ocean Disposal • Successful low-impact alternative • Over 15 million cy diverted from in-Bay disposal to date • Beneficial Reuse • ~20 million cy has already been reused • Current and near-term capacity for many millions cy more • Beach Nourishment • ~1 million cy sand placed nearshore for Ocean Beach demo project • EPA/USACE preparing to designated official reuse site “SF-17”

  7. Montezuma Wetlands Project Sonoma Baylands & Carneros River Ranch Hamilton Army Airfield/BMK Middle Harbor Habitat Area SF-8/Ocean Beach Nourishment Site Bair Island Major Bay Area Beneficial Reuse Sites Cullinan Ranch S. Bay Salt Ponds?

  8. But Today We Face New Challenges that the LTMS Plan Did Not Foresee: • Short Term: • Escalating costs for: • Ocean disposal • Hydraulic offloading at reuse sites • Flat or decreasing dredging budgets • Long Term: • Sediment deficit (habitat erosion, Bay water quality) • Climate change – especially sea level rise – will accelerate habitat loss and other changes

  9. Changed Situation The New World: Sediment Deficit Point San Pablo, mid-depth, Dave Schoellhamer, USGS

  10. Changed Situation Sediment Supply Shift: from the Delta to local tributaries Oakland Museum Creek Guide

  11. Changed Situation The New World: Sea Level Rise Area subject to high tide with 16 inches of sea level rise 55 inches of sea level rise and Current 100-year flood plain

  12. Shorelines, Marshes and Beaches need sediment to keep up with sea level rise PWA & PRBO in review

  13. Sand mining removing sand Sand appears slow to replenish Patrick Barnard & Rikk Kvitek

  14. Ocean Disposal Removes Sediment from the System

  15. Is the LTMS Approach to Sediment Management too Narrow? • Minimizes in-Bay disposal • Emphasizes large-scale tidal wetland projects • Ocean disposal for remaining dredged material Or Does It Need to be Re-Framed?

  16. How can LTMS help in this New World? • RSM planning: coordinate sediment sources and needs beyond navigation dredging? • Sand miners • Flood control districts • Watershed management • Less reliance on mega-projects? • New kinds of Beneficial Reuse, including in-Bay? • New policies/laws to facilitate reuse? • Your Ideas?

  17. LTMS RSM • While still working under the LTMS Management Plan for dredging: • Funding local tributaries study • Funding sediment modeling (“UnTRIM” combined with “Sedmorph” and “SWAN”) • State of the Sediment Workshop 2010 • Spring 2011 RSM Stakeholders Workshop • Stakeholder listening sessions • Work toward 2010 program review

  18. Contact Information • Brian Ross (EPA): 415.972.3475 • Ross.Brian@epa.gov • Brenda Goeden (BCDC): 415.352.3623 • brendag@bcdc.ca.gov • Al Paniccia (USACE): 415.503.6735 • Al.Paniccia@usace.army.mil • Beth Christian (Water Board) 510.622.2335 • echristian@waterboards.ca.gov