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December 19, 2007December 19, 2007

North-of-the-Delta Offstream Storage

Project Overview

North-of-the-Delta Offstream Storage

Project Overview

State of CaliforniaDepartment of Water Resources

U.S. Department of the InteriorBureau of Reclamation

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Feasibility Study PhasesFeasibility Study Phases

Initial Alternatives Initial Alternatives

Plan Formulation Plan Formulation

Feasibility StudyFeasibility Study

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Feasibility Study Phase 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)

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)

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Planning ObjectivesPlanning 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

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

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See detail map

New Pipeline

FacilitiesFacilities

Sites Reservoir Storage Capacity: 1,800 TAF

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Potential Benefits 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

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

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Improve System Flexibility 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

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

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ShastaShasta

SitesSitesOrovilleOroville

FolsomFolsom

●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

●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

Ecosystem Restoration ActionsEcosystem Restoration Actions

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Planning SchedulePlanning Schedule

2005 2006 2007 2008 2009

Initial Alternatives Information Report

Plan Formulation Report

Final Feasibility Report & EIS/EIR

DefineInitial

AlternativesDevelop & Evaluate

Alternatives

Draft Feasibility Report & EIS/EIR

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Sacramento RiverDaily Operations Model

(DOM)

Sacramento RiverDaily Operations Model

(DOM)

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Sacramento River DOMSacramento River DOMWill provide the foundational daily flow dataset for a

number of recently developed models:Reclamation’s Sacramento River Water Quality

ModelTNC 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

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

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Sacramento River DOM StatusSacramento 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

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

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DOM HindcastDOM 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

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