In-Delta Storage Program
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Transcript of In-Delta Storage Program
In-Delta Storage Program
• Background and historyBackground and history
• Evolution of the fish screensEvolution of the fish screens
• Proposed Re-engineered Delta Proposed Re-engineered Delta Wetlands Project operationsWetlands Project operations
• Fish screen structureFish screen structure
OutlineOutline
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
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).
Delta WetlandsBacon and Webb (Storage)
Holland and Bouldin (Habitat)
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
• Decision 1643 from the SWRCBDecision 1643 from the SWRCB
• SWRCB CWA Section 401 Water Quality SWRCB CWA Section 401 Water Quality CertificationCertification
• ACOE 404 PermitACOE 404 Permit
Permits ReceivedPermits Received
Permit Fisheries Requirements
• Final Operations Criteria– Diversion measures– Discharge measures– Other measures– Fish monitoring program– Exports limited to 250,000 AF per year
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.
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.
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.
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
Re-engineered Delta Wetlands ProjectBacon and Webb (Storage)
Holland and Bouldin (Habitat)