Released On: February 14, 2003
Reclamation traditionally expresses the monthly outlook as a percentage (see summary table) of the contract total for each of the contract categories. Allocations are also compared to the recent historic 5-year average of the final forecasts.
Decisions on the allocation are made based on the following: - Meeting D-1641 standards set by the State Water Resources Control Board - Meeting water supply and water rights contracts and agreements - Satisfying Endangered Species Act requirements - Implementing Section 3406(b)(2) of the Central Valley Project Improvement Act (CVPIA) as clarified by court decisions - Implementing the CALFED Record of Decision - Implementing the Trinity River Mainstem Restoration Record of Decision as limited by a recent court decision
Factors and conditions that influence the allocation include: - Changes to hydrology - Opportunities to exercise operational flexibility of the CVP - Upstream CVP storage and San Luis Reservoir storage conditions
The CVP and California State Water Project will be operated to support the minimum storage needs in San Luis Reservoir through the summer months. Reclamation will review the delivery schedules submitted by the CVP contractors and coordinate the operations with the California Department of Water Resources to achieve the storage targets in San Luis Reservoir. As the water year progresses and the water supply situation becomes more certain, the allocation to all contractors will be modified to fully utilize available resources. Agriculture and Municipal & Industrial (M&I) contractors with conserved 2002 CVP supplies in San Luis Reservoir will be able to augment their 2003 deliveries.
Mid-Pacific Region Initial Water Year 2003 Supply Allocation February 14, 2003
Probability of Exceedence Forecasts Percent of Historical Average Sacramento Valley Index & Year Type North of Delta Allocation South of Delta Allocation
Ag M&I R WR Ag M&I R WR
90% 74% Dry 100 100 100 100 60* 85* 100 100
50% 99% Above Normal 100 100 100 100 60* 85* 100 100
Recent Historic Average (5-Year Average Allocation) 92 96 100 100 61 86 100 100
Municipal and Industrial supply is based on historical deliveries. *The allocation percentage for both the 50 and 90 percent forecasts is the same. This is due to uncertainties in the Water Quality Control Plan actions and actions for protection of endangered species.
Reclamation is looking at actions in cooperation with other State and Federal agencies within the CALFED Bay-Delta Program to improve south-of-the-Delta allocations to 65-70 percent in normal years as called for under the CALFED Record of Decision. Reclamation intends to focus efforts through the CALFED process in the coming months to address the long-term challenges of balancing the need to export to south-of-the-Delta contractors and provide environmental protection and restoration. Reclamation and the other agencies in CALFED remain committed to working closely with the State to resolve both short-term and long-term water reliability and operational flexibility issues.
In the 90-percent exceedence forecast, there is no water supply allocation for CVP East Side Division contractors (Stanislaus River). In the 50 percent exceedence forecast, the allocation is projected to be approximately 4 percent of the contracted amount.
The Friant Division deliveries for Water Year 2003 are projected to be 560,000 acre-feet, or 37 percent of the historic water supply of 1.5 million acre-feet. The allocation for Friant Division contractors will be 70 percent of Class 1 water and 0 (zero) percent of Class 2 water. The projected Friant Division delivery of 560,000 acre-feet is based on the DWR 90 percent exceedence forecast. Through February 13, 2003, precipitation in the San Joaquin River watershed was 22.50 inches compared to 25.61 inches this time last year.
Throughout the precipitation season, updated information will be provided as conditions warrant. For additional information on the Initial Water Year 2003 Allocation press release, contact the Public Affairs Office at 916-978-5100, TDD 916-978-5608. In the coming months, additional information will continue to be posted on the Mid-Pacific Region's website at www.mp.usbr.gov .
DOI | Recreation.gov | USA.gov
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