This document discusses planning for the South Delta Improvement Program (SDIP) in California. SDIP aims to reduce juvenile salmon movement into the south Delta and maintain water supplies and quality for agriculture. However, the program has faced many challenges over its history from 1982 to present due to changing environmental regulations, endangered species protections, and scientific understanding. Ongoing modeling, design modifications, and interim actions aim to balance water delivery and environmental goals in this complex system.

1. Acceptable Solutions Don’t Come Easyfor theSAME Conference October 2009

2. Delta Conveyance and the South Delta State Water Project H. O. Banks and Central Valley Project Jones Pumping Plant rely on through Delta Conveyance

3. In-Delta water users rights must be protected

4. State Water Resources Control Board Decision 1641SDIP Objectives/PurposeStage IReduce the movement of San Joaquin River watershed Central Valley fall‑/late fall–run juvenile Chinook salmon into the south Delta via Old River;

5. Maintain adequate water levels and, through improved circulation, water quality available for agricultural diversions in the south Delta, downstream of the head of Old River; andStage II Increase water deliveries and delivery reliability for SWP and CVP water contractors south of the Delta and provide opportunities to convey water for fish and wildlife purposes by increasing the maximum permitted level of diversion through the existing intake gates at CCF to 8,500 cfs. (The planning and environmental process for Stage II is currently suspended.)SDIP History1982 South Delta Water Agency lawsuit against the Bureau of Reclamation and DWR. DWR’s principle involvement is water levels.

6. 2000 CALFED Record of Decision calls for construction of operable gates and dredging in the south Delta as well as increasing diversion limits

7. 2004 DWR and Reclamation decouple increasing the permitted SWP diversion capacity to 8500 cfs from the operable gates and dredging construction

8. November 2005 SDIP Draft EIS/EIR released

9. December 2006 DWR certifies Final SDIP EIS/EIR

10. 2007 Reclamation restarts Section 7 ESA for the Operations Criteria and Plan (OCAP); SDIP operations are linked to OCAP thus halting progress

11. June 2009 National Marine Fisheries Service OCAP Biological Opinion SDIP Planning CALSIM IIGeneralized Hydrologic Simulation Model

12. Sacramento and San Joaquin River Systems

13. Evaluate Water Operation Scenarios Including Delta Operations

14. Used to Simulate Current and Future Operations

15. Supply and Demands EvaluatedState Water ProjectCentral Valley Project (Federal)LocalSDIP Planning CALSIM IIStatewide CVP & SWP Water Allocation ModelCALSIM

16. SDIP Planning CALSIM IIDelta operations simulated based on supply, demand, and operational rules

17. Exports determined for baseline, future without project conditions, and alternatives using current and future demandsSacramentoMartinezStocktonImage from USBR GIS GroupSDIP Planning DSM2 CalSim II Time Series Data Input

18. Simulates Delta Hydraulics

19. Includes in Delta Consumptive Use

20. Simulates Water Quality (EC)

21. Gate Operations ModeledSDIP Planning DSM2 Delta Hydraulics

22. Models Salinity

23. Used for Planning and Water Operations SDIP Physical Features