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Marin County Watershed Stewardship Program - Protecting and Enhancing Natural Resources

The Marin County Watershed Stewardship Program integrates flood protection, restoration, fish passage, and water quality improvements in Marin's watersheds. Find out why this approach is crucial, its key stakeholders, objectives, and next steps. Visit www.marinwatersheds.org for more information.

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Marin County Watershed Stewardship Program - Protecting and Enhancing Natural Resources

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  1. Marin County Watershed Stewardship Program Marin County Department of Public Works

  2. Countywide Watershed Program The watershed program provides a framework to integrate flood protection, creek and wetland restoration, fish passage and water quality improvements with public and private partners to protect and enhance Marin’s watersheds.

  3. Why A Watershed Approach? • Why now? We have momentum and support from our partners and the County. • The issues identified by the community aren’t going away so this program allows us to be ready when the economy recovers and new funding programs come on line. • Supports and guides protection and enhancement of significant natural resources • Ensuresalignment with State and Federal resource agency goals which should support timely project implementation • Leveragesfunding to attract State and Federal sources • Dedicatesstaff to search for and pursue funding

  4. Board of Supervisors Flood Control and Water Conservation District • Policy Advisory Committee: • BOS FC District Rep • City Council Reps • Flood Zone Advisory Board Reps • Water and Sanitary Board Reps • Operations and Finance Committee: • City Managers & County DPW Director • Technical Working Group: • Municipal Directors • Local, State & Federal Agency Reps • Watershed Groups • Homeowner’s Association Reps Stakeholder Process

  5. Objectives • Provide an increased level of flood protection • Reduce on-going maintenance costs and impacts • Develop projects that provide multiple benefits i.e restoration and flood protection • Ability to permit as a self-mitigating project • Respond to sea level rise • Opportunities to improve ecological benefits • Ability to meet multiple partner agency objectives

  6. Next Steps • Continued improvements to the website • Watershed-level planning • Habitat Assessments • Hydrology and Hydraulics studies • Watershed Master Plans • Continued review of grants and other funding opportunities

  7. Habitat Assessment • 2009 Fish and Game creek assessments • Goal is to translate their data into an informative and accessible manner • Spatial or GIS analysis is the tool • Fish passage barriers • Pipelines and other infrastructure • Storm drain system • Restoration opportunities • Habitat features • Flow history and stream persistence • Other relevant information

  8. Hydrology and Hydraulics • Collecting field data including topography, rainfall, stream flow, and sediment transport • Using the field data, a model is developed to show: • How water moves in the creek • Water depth outside the creek • How will the model be used? • Representation of past and predicted storms • Depict the footprint and elevation of flood waters • Show the benefit of any proposed alternative • Can be altered to include new information in the future

  9. Hydrologic model development Model is a predictive tool to test the effectiveness of various flood control measures 5,400 cfs 1700 cfs

  10. H & H Study outcomes • Understanding of the flood benefit and estimated cost for all proposed projects. • Clear understanding of the current flood impacts for a series of storm events • Model will be a tool that quantifies the flood impact • Shows the extent and depth of flooding before and after for a given alternative or a suite of alternatives • Can be adapted for future conditions

  11. www.marinwatersheds.org For more information contact: Liz Lewis, Principal Planner 499-7226 Chris Choo, Senior Planner 499-7586

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