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Water Planning & Stewardship Committee Item #6b Summary

Water Planning & Stewardship Committee Item #6b Summary. Subject: Review of Long-Term Delta Actions & Water Supply Planning Implications Purpose: To open discussions with board members for further direction or recommendations regarding long-term Delta actions. 1.

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Water Planning & Stewardship Committee Item #6b Summary

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  1. Water Planning & Stewardship CommitteeItem #6bSummary Subject: Review of Long-Term Delta Actions & Water Supply Planning Implications Purpose: To open discussions with board members for further direction or recommendations regarding long-term Delta actions. 1

  2. Water Planning & Stewardship CommitteeItem #6b Summary: Recent actions to protect Delta smelt is likely to challenge MWD and other water users with more prolonged curtailments. In addition, two ongoing efforts (Bay Delta Conservation Plan & Governor’s Delta Vision) are developing long-term solutions, with a recommendation targeted for the end of 2007. This Board Report provides more detailed information on potential long-term actions, and water supply planning implications. 2

  3. Delta Long-Term Options Water Planning and Stewardship Committee 6b August 20, 2007 Delta Vision Process -- Long-Term Options Other Stakeholder Vision Statements

  4. Delta Long-Term Options Water Planning and Stewardship Committee 6b August 20, 2007 Delta Vision Process -- Long-Term Options Other Stakeholder Vision Statements

  5. Sac River Long-Term VisionAlternative ‘A’ – Existing Delta with Fortified Levees Yolo Bypass Sacramento Suisun Marsh Stockton A SWP Pumps CVP Pumps

  6. Long-Term VisionAlternative ‘A’ – Existing Delta with Fortified Levees • Performance • Fishery and water supply conflict remain • Continued vulnerability to seismic risks and sea-level rise

  7. Sac River Long-Term VisionAlternative ‘B’ – Eco-Crescent / Middle River Corridor Sacramento B Stockton Delta Smelt Habitat SWP Pumps CVP Pumps

  8. Sac River Long-Term VisionAlternative ‘B’ – Eco-Crescent / Middle River Corridor Sacramento Old River Middle River B Stockton Delta Smelt Habitat SWP Pumps CVP Pumps

  9. Sac River Long-Term VisionAlternative ‘B’ – Eco-Crescent / Middle River Corridor Yolo Bypass Sacramento Suisun Marsh B Stockton Delta Smelt Habitat SWP Pumps CVP Pumps

  10. Long-Term VisionAlternative ‘B’ – Eco-Crescent / Middle River Corridor • Performance • Stop-gap measure to benefit delta smelt • Continued vulnerability to seismic risks and sea-level rise • Near-term ecosystem and water supply benefits

  11. Sac River Long-Term VisionAlternative ‘C’ - Dual-Intake Conveyance(Eco-Crescent + Conveyance Canal) Sacramento C B Stockton SWP Pumps CVP Pumps

  12. Long-Term VisionAlternative ‘C’ - Dual-Intake Conveyance(Eco-Crescent + Conveyance Canal) • Performance • Addresses vulnerability to seismic risks & sea-level rise • Operational flexibility • Reduction of fish mortality • Near-term ecosystem and water supply benefits

  13. Sac River Long-Term VisionAlternative ‘D’ - Fully Isolated Conveyance Sacramento D Stockton SWP Pumps CVP Pumps

  14. Long-Term VisionAlternative ‘D’ - Fully Isolated Conveyance • Performance • Reduces vulnerability to seismic risks and sea-level rise • Improved export water quality • Enhances fishery habitat throughout Delta • Enhances ability to screen fish

  15. Alternative Planning, Design, Construction Existing Delta (w/ Fortified Levees) Levee Rehab Costs TBD Eco-Crescent $0.1 – 0.3 billion Fully Isolated $3.3 – 3.8 billion Dual-Intake (Eco-Crescent + Conveyance Canal) $3.8 – 4.4 billion Cost Comparison Long-Term Alternatives

  16. Water Quality Comparison Long-Term Alternatives

  17. Water Reliability Comparison Long-Term Alternatives (SWP Deliveries) * Current supplies at risk due to fishery declines ** Preliminary studies – alternative capacities/sizes being modeled

  18. Delta Long-Term Options Water Planning and Stewardship Committee 6b August 20, 2007 Delta Vision Process -- Long-Term Options Other Stakeholder Vision Statements

  19. Stakeholder Vision Statements • Environmental Caucus • In-Delta Agriculture • Allied Fishing Groups • Restore the Delta Coalition • Environmental Justice Coalition for Water • Contra Costa Council (Business) • DWR and US Bureau of Reclamation • Other Individuals

  20. Sacramento Stockton SWP Pumps CVP Pumps

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