The Bureau of Reclamation's Central Valley Project (CVP) is carrying over approximately 3.9 million acre-feet of water, 35 percent of capacity, into Water Year (WY) 2009. This is little more than half the 15-year carry-over average.
The Bureau of Reclamation's water year runs from Oct. 1 to Sept, 30. The 15-year carry-over average is 6.7 million acre-feet. Carry-over storage is the combined amount of water remaining at the end of the water year in Shasta, Trinity, Folsom, and New Melones reservoirs and the Federal share of the joint Federal/State San Luis Reservoir.
Precipitation in California this year was only about 80 percent of average. In the Northern Sierra Nevada, the eight-station index of precipitation in for the water year currently ending is 35 inches. The seasonal average is 50 inches.
The total 2008 deliveries for the CVP are estimated at 5.7 million acre-feet. Historically, the CVP supplies annually about 7 million acre-feet of water for agriculture, cities, and the environment. Reservoir releases throughout the summer were made to meet downstream and fishery flow management objectives, Delta water quality requirements, and CVP water supply demands.
The Friant Division deliveries for this season were 75 percent (870,000 acre-feet) of the historic water supply of 1.15 million acre-feet. The precipitation total for the San Joaquin River watershed was 28.24 inches.
As the new water gets under way, the bureau will be monitoring and evaluating hydrologic conditions. All major reservoirs will meet the prescribed flood-control objectives for the beginning of the 2008-2009 flood season. Preliminary CVP water allocation for 2009 will be made in mid-January.