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Water Planning & Stewardship CommitteeItem #6bSummary
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.
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Water Planning & Stewardship CommitteeItem #6b
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.
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Delta Long-Term OptionsDelta Long-Term OptionsWater Planning and Stewardship CommitteeWater Planning and Stewardship Committee
6b6bAugust 20, 2007August 20, 2007
Delta Long-Term OptionsDelta Long-Term OptionsWater Planning and Stewardship CommitteeWater Planning and Stewardship Committee
6b6bAugust 20, 2007August 20, 2007
Delta Vision Process -- Long-Term OptionsDelta Vision Process -- Long-Term Options
Other Stakeholder Vision StatementsOther Stakeholder Vision Statements
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Delta Long-Term OptionsDelta Long-Term OptionsWater Planning and Stewardship CommitteeWater Planning and Stewardship Committee
6b6bAugust 20, 2007August 20, 2007
Delta Long-Term OptionsDelta Long-Term OptionsWater Planning and Stewardship CommitteeWater Planning and Stewardship Committee
6b6bAugust 20, 2007August 20, 2007
Delta Vision Process -- Long-Term OptionsDelta Vision Process -- Long-Term Options
Other Stakeholder Vision StatementsOther Stakeholder Vision Statements
Sac River
Sac River
Sac River
Sac RiverSacramentoSacramentoSacramentoSacramento
StocktonStocktonStocktonStockton
Long-Term VisionLong-Term VisionAlternative ‘Alternative ‘AA’ – Existing Delta with Fortified Levees ’ – Existing Delta with Fortified Levees
Long-Term VisionLong-Term VisionAlternative ‘Alternative ‘AA’ – Existing Delta with Fortified Levees ’ – Existing Delta with Fortified Levees
SWP PumpsSWP PumpsSWP PumpsSWP Pumps
CVP PumpsCVP PumpsCVP PumpsCVP Pumps
AA
Suisun MarshSuisun MarshSuisun MarshSuisun Marsh
Yolo BypassYolo BypassYolo BypassYolo Bypass
55
Performance– Fishery and water supply conflict remain– Continued vulnerability to seismic risks and
sea-level rise
66
Long-Term VisionLong-Term VisionAlternative ‘Alternative ‘AA’ – Existing Delta with Fortified Levees ’ – Existing Delta with Fortified Levees
Long-Term VisionLong-Term VisionAlternative ‘Alternative ‘AA’ – Existing Delta with Fortified Levees ’ – Existing Delta with Fortified Levees
Sac River
Sac River
Sac River
Sac RiverSacramentoSacramentoSacramentoSacramento
StocktonStocktonStocktonStockton
Long-Term VisionLong-Term VisionAlternative ‘Alternative ‘BB’ – Eco-Crescent / Middle River Corridor ’ – Eco-Crescent / Middle River Corridor
Long-Term VisionLong-Term VisionAlternative ‘Alternative ‘BB’ – Eco-Crescent / Middle River Corridor ’ – Eco-Crescent / Middle River Corridor
SWP PumpsSWP PumpsSWP PumpsSWP Pumps
CVP PumpsCVP PumpsCVP PumpsCVP Pumps
Delta Smelt Delta Smelt HabitatHabitat
Delta Smelt Delta Smelt HabitatHabitat
BB
77
Sac River
Sac River
Sac River
Sac RiverSacramentoSacramentoSacramentoSacramento
StocktonStocktonStocktonStockton
Long-Term VisionLong-Term VisionAlternative ‘Alternative ‘BB’ – Eco-Crescent / Middle River Corridor ’ – Eco-Crescent / Middle River Corridor
Long-Term VisionLong-Term VisionAlternative ‘Alternative ‘BB’ – Eco-Crescent / Middle River Corridor ’ – Eco-Crescent / Middle River Corridor
SWP PumpsSWP PumpsSWP PumpsSWP Pumps
CVP PumpsCVP PumpsCVP PumpsCVP Pumps
Delta Smelt Delta Smelt HabitatHabitat
Delta Smelt Delta Smelt HabitatHabitat
BB
Old RiverOld RiverMiddle RiverMiddle River
88
Sac River
Sac River
Sac River
Sac RiverSacramentoSacramentoSacramentoSacramento
StocktonStocktonStocktonStockton
Long-Term VisionLong-Term VisionAlternative ‘Alternative ‘BB’ – Eco-Crescent / Middle River Corridor ’ – Eco-Crescent / Middle River Corridor
Long-Term VisionLong-Term VisionAlternative ‘Alternative ‘BB’ – Eco-Crescent / Middle River Corridor ’ – Eco-Crescent / Middle River Corridor
SWP PumpsSWP PumpsSWP PumpsSWP Pumps
CVP PumpsCVP PumpsCVP PumpsCVP Pumps
Suisun MarshSuisun MarshSuisun MarshSuisun Marsh
Yolo BypassYolo BypassYolo BypassYolo Bypass
Delta Smelt Delta Smelt HabitatHabitat
Delta Smelt Delta Smelt HabitatHabitat
BB
99
Performance– Stop-gap measure to benefit delta smelt– Continued vulnerability to seismic risks and
sea-level rise– Near-term ecosystem and water supply
benefits
1010
Long-Term VisionLong-Term VisionAlternative ‘Alternative ‘BB’ – Eco-Crescent / Middle River Corridor ’ – Eco-Crescent / Middle River Corridor
Long-Term VisionLong-Term VisionAlternative ‘Alternative ‘BB’ – Eco-Crescent / Middle River Corridor ’ – Eco-Crescent / Middle River Corridor
Sac River
Sac River
Sac River
Sac RiverSacramentoSacramentoSacramentoSacramento
StocktonStocktonStocktonStockton
Long-Term VisionLong-Term VisionAlternative ‘Alternative ‘CC’ - Dual-Intake Conveyance’ - Dual-Intake Conveyance
(Eco-Crescent + Conveyance Canal)(Eco-Crescent + Conveyance Canal)
Long-Term VisionLong-Term VisionAlternative ‘Alternative ‘CC’ - Dual-Intake Conveyance’ - Dual-Intake Conveyance
(Eco-Crescent + Conveyance Canal)(Eco-Crescent + Conveyance Canal)
SWP PumpsSWP PumpsSWP PumpsSWP Pumps
CVP PumpsCVP PumpsCVP PumpsCVP Pumps
CC
BB
1111
Performance– Addresses vulnerability to seismic risks &
sea-level rise– Operational flexibility– Reduction of fish mortality– Near-term ecosystem and water supply benefits
1212
Long-Term VisionLong-Term VisionAlternative ‘Alternative ‘CC’ - Dual-Intake Conveyance’ - Dual-Intake Conveyance
(Eco-Crescent + Conveyance Canal)(Eco-Crescent + Conveyance Canal)
Long-Term VisionLong-Term VisionAlternative ‘Alternative ‘CC’ - Dual-Intake Conveyance’ - Dual-Intake Conveyance
(Eco-Crescent + Conveyance Canal)(Eco-Crescent + Conveyance Canal)
Sac River
Sac River
Sac River
Sac RiverSacramentoSacramentoSacramentoSacramento
StocktonStocktonStocktonStockton
Long-Term VisionLong-Term VisionAlternative ‘Alternative ‘DD’ - Fully Isolated Conveyance ’ - Fully Isolated Conveyance
Long-Term VisionLong-Term VisionAlternative ‘Alternative ‘DD’ - Fully Isolated Conveyance ’ - Fully Isolated Conveyance
SWP PumpsSWP PumpsSWP PumpsSWP Pumps
CVP PumpsCVP PumpsCVP PumpsCVP Pumps
DD
1313
Performance– Reduces vulnerability to seismic risks and
sea-level rise– Improved export water quality– Enhances fishery habitat throughout Delta– Enhances ability to screen fish
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Long-Term VisionLong-Term VisionAlternative ‘Alternative ‘DD’ - Fully Isolated Conveyance ’ - Fully Isolated Conveyance
Long-Term VisionLong-Term VisionAlternative ‘Alternative ‘DD’ - Fully Isolated Conveyance ’ - Fully Isolated Conveyance
Alternative Alternative Planning, Design, Planning, Design, ConstructionConstruction
Existing Delta Existing Delta (w/ Fortified Levees)(w/ Fortified Levees)
Levee Rehab Costs TBDLevee Rehab Costs TBD
Eco-CrescentEco-Crescent $0.1 – 0.3 billion$0.1 – 0.3 billion
Fully IsolatedFully Isolated $3.3 – 3.8 billion$3.3 – 3.8 billion
Dual-Intake Dual-Intake (Eco-Crescent + Conveyance (Eco-Crescent + Conveyance
Canal)Canal)$3.8 – 4.4 billion$3.8 – 4.4 billion
Cost ComparisonCost ComparisonLong-Term AlternativesLong-Term AlternativesCost ComparisonCost ComparisonLong-Term AlternativesLong-Term Alternatives
1515
Water Quality ComparisonWater Quality ComparisonLong-Term AlternativesLong-Term Alternatives
Water Quality ComparisonWater Quality ComparisonLong-Term AlternativesLong-Term Alternatives
ExistingExisting Eco-CrescentEco-CrescentDual-Intake/Fully Dual-Intake/Fully Isolated Facility Isolated Facility
(5,000 – 15,000 cfs)(5,000 – 15,000 cfs)
SalinitySalinity (TDS)(TDS) 234 mg/l234 mg/l
5% 5% improvementimprovement
(222 mg/l)(222 mg/l)
32 – 57% 32 – 57% improvementimprovement
(159 to 100 mg/l)(159 to 100 mg/l)
BromideBromide 200 ug/l200 ug/l5% 5%
improvementimprovement(190 ug/l)(190 ug/l)
56 – 90% 56 – 90% improvementimprovement
(88 to 20 ug/l)(88 to 20 ug/l)
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Water Reliability ComparisonWater Reliability ComparisonLong-Term Alternatives (SWP Deliveries)Long-Term Alternatives (SWP Deliveries)
Water Reliability ComparisonWater Reliability ComparisonLong-Term Alternatives (SWP Deliveries)Long-Term Alternatives (SWP Deliveries)
Existing *Existing * Eco-CrescentEco-Crescent Dual-Intake/Fully Dual-Intake/Fully Isolated FacilityIsolated Facility
Low Low ReliabilityReliability
(2.4 - 3.0 MAF)(2.4 - 3.0 MAF)
MediumMediumReliabilityReliability(2.6 –2.8 MAF)(2.6 –2.8 MAF)
HighHighReliabilityReliability(3.0+ MAF **)(3.0+ MAF **)
* Current supplies at risk due to fishery declines** Preliminary studies – alternative capacities/sizes being modeled* Current supplies at risk due to fishery declines** Preliminary studies – alternative capacities/sizes being modeled
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Delta Long-Term OptionsDelta Long-Term OptionsWater Planning and Stewardship CommitteeWater Planning and Stewardship Committee
6b6bAugust 20, 2007August 20, 2007
Delta Long-Term OptionsDelta Long-Term OptionsWater Planning and Stewardship CommitteeWater Planning and Stewardship Committee
6b6bAugust 20, 2007August 20, 2007
Delta Vision Process -- Long-Term OptionsDelta Vision Process -- Long-Term Options
Other Stakeholder Vision StatementsOther Stakeholder Vision Statements
Stakeholder Vision StatementsStakeholder Vision StatementsStakeholder Vision StatementsStakeholder 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
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