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December 19, 2007

U.S. Department of the Interior Bureau of Reclamation. State of California Department of Water Resources. North-of-the-Delta Offstream Storage Project Overview. December 19, 2007. Feasibility Study Phases. Initial Alternatives. Plan Formulation. Feasibility Study.

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December 19, 2007

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  1. U.S. Department of the Interior Bureau of Reclamation State of California Department of Water Resources North-of-the-Delta Offstream StorageProject Overview December 19, 2007

  2. Feasibility Study Phases Initial Alternatives Plan Formulation Feasibility Study

  3. Feasibility Study Phase • Refine and compare alternatives • Refine operations • Complete feasibility-level design and cost estimates • Evaluate environmental effects • Perform benefit/cost analysis • Prepare feasibility report and environmental documents (EIS/EIR)

  4. Planning Objectives • Primary Objectives: • Increase water supply and water supply reliability and Sacramento Valley water management flexibility • Improve Delta water quality • Increase the survival of anadromous fish populations in the Sacramento River, as well as the health and survivability of other aquatic species • Secondary Objectives: • Provide ancillary hydropower generation • Provide additional recreational opportunities • Provide incremental flood damage reduction benefits

  5. Facilities Sites Reservoir Storage Capacity: 1,800 TAF

  6. Potential Benefits • Support ecosystem restoration • Increase water supply and water supply reliability for: • Urban • Agricultural • Environmental • Improve Delta water quality • Improve system flexibility • Provide ancillary hydropower generation • Improve flood protection • Increase recreational opportunities • Provide for Delta emergency response

  7. Improve System Flexibility • Sites can provide much needed flexibility to the state’s constrained water management system • Sites can be operated to contribute to the long-term sustainability of the Delta ecosystem, maintain water quality and supply reliability, and mitigate the effects of Delta levee failure • Restoration Action storage could be adaptively managed to support restoration actions in the Sacramento River and the Delta • Added flexibility from Sites can also improve the viability and effectiveness of conjunctive management, water exchanges and transfers

  8. Shasta Sites Oroville Folsom Ecosystem Restoration Actions • Provide Stable Flows – Keswick to Colusa • Increase Cold Water Pool in Shasta Lake • Improve Fish Passage at RBDD • Reduce Diversions at TC and GCID Canals • Provide Supplemental Flows for Cottonwood Establishment 9

  9. Planning Schedule Plan Formulation Report Initial Alternatives Information Report Final Feasibility Report & EIS/EIR Draft Feasibility Report & EIS/EIR Define Initial Alternatives Develop & Evaluate Alternatives 20052006 2007 2008 2009

  10. Sacramento RiverDaily Operations Model(DOM)

  11. Sacramento River DOM Will provide the foundational daily flow dataset for a number of recently developed models: • Reclamation’s Sacramento River Water Quality Model • TNC Sacramento River Ecological Flows Tool • Reclamation’s Models on Physical River Processes and Riparian Habitat on the Sacramento River • DWR (NODOS) Winter-Run and Spring-Run Life Cycle IOS Models

  12. Sacramento River DOM Status • Reservoir operations calibrated based on historical flood and uncontrolled release operations of 1995 – 2003 • QA / Agency review and CALSIM II interface need to be completed to support scenario (i.e. project or program) analyses • Methodology has been applied to develop a “hindcast” of the daily flows for 1964 – 2003

  13. DOM Hindcast • Useful for calibration and verification of models (specifically model efforts that require daily flows from Keswick Dam to Knights Landing)  • Some concerns remain about the routing and operations between Ord Ferry and Knights Landing due to sparseness in observations • Does not provide scenario testing capability, but will inform the DOM development as it is integrated with the CALSIM II model

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