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In-Delta Storage Program

In-Delta Storage Program. Outline. Background and history Evolution of the fish screens Proposed Re-engineered Delta Wetlands Project operations Fish screen structure. Why are DWR and Reclamation Involved?. CALFED ROD

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In-Delta Storage Program

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  1. In-Delta Storage Program

  2. Outline • Background and history • Evolution of the fish screens • Proposed Re-engineered Delta Wetlands Project operations • Fish screen structure

  3. Why are DWR and Reclamation Involved? • CALFED ROD • Reclamation and DWR ‘98-’99 evaluations concluded proposed locations meet CALFED’s environmental restoration and water supply reliability objectives • December 2001 DWR/Reclamation completed a joint planning study

  4. DWR/Reclamation Involvement • Joint planning study concluded that for ownership by DWR/Reclamation, the Delta Wetlands Project requires modifications and additional analyses before it is appropriate to initiate negotiations with Delta Wetlands or other land owners. • Joint planning study work was reviewed by a CALFED Science Panel and the Independent Board of Consultants. • June 2003 complete Feasibility Study (state version).

  5. Delta WetlandsBacon and Webb (Storage) Holland and Bouldin (Habitat)

  6. Delta Wetlands Proposed Project • Delta Wetlands Properties, Inc., a private company, made a proposal in July 1987 for storage on Webb Tract and Bacon Islands with habitat development on Holland and Bouldin Islands • The Final Operations Criteria were completed in January 1997 • USFWS and NMFS biological opinions were issued in May 1997 • EIR was completed in May 2000 • DFG’s Incidental Take Permit was issued in June 2001 • EIS was completed in July 2001

  7. Decision 1643 from the SWRCB SWRCB CWA Section 401 Water Quality Certification ACOE 404 Permit Permits Received

  8. Permit Fisheries Requirements • Final Operations Criteria • Diversion measures • Discharge measures • Other measures • Fish monitoring program • Exports limited to 250,000 AF per year

  9. FOC Diversion Measures • Timing and duration of diversions are dictated by the position of X2. • No diversions can occur in April and May. • Diversions linked to the delta smelt Fall Midwater Trawl index. • Limited by percentage of available surplus water. • Can not exceed a set percentage of previous day’s net Delta outflow rate and a percentage of the San Joaquin River inflow rate.

  10. FOC Diversion Measures - continued • Diversion rates are reduced by 50% if delta smelt are detected by in-channel monitoring from December – August. • Linked to operation of the DCC gates. • Maximum topping-off rates are set.

  11. FOC Discharge Measures • No discharges for export or rediversion from Webb Tract can occur from January – June. • February – July discharges for export are limited by percentages of available unused capacity at CVP and SWP. • Provides for environmental water releases December – June. • Discharges for export are reduced by 50% if delta smelt are detected by daily in-channel monitoring April - August.

  12. Other Measures • Fish screen final design and installation guidelines are subject to the approval of the regulatory agencies. • 200 acres of shallow water habitat protected by conservation easement • Boat wake erosion fee • Mitigation ratio of 3:1 for aquatic habitat impacts from siphon and pumping stations and boat docks • Temperature and DO limits for discharges • Incidental entrainment compensation

  13. Re-engineered Delta Wetlands ProjectBacon and Webb (Storage) Holland and Bouldin (Habitat)

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