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U.S. Bureau of Reclamation Outlines CVP Water Supply Conditions


The U.S. Bureau of Reclamation on Jan. 20 provided an update on water supply conditions for the federal Central Valley Project, announcing that the CVP’s reservoir carryover storage from Water Year 2016 to Water Year 2017 was 4.9 million acre-feet, which was 41% of capacity and 82% of the 15-year average for that date.

The water supply conditions indicate capacity in six key CVP reservoirs: Shasta, New Melones, Trinity, Folsom, Millerton, and the federal portion of San Luis.

“Since October 2016, precipitation throughout the Central Valley has been significantly above average in every month with the exception of November,” said Mid-Pacific Regional Director David Murillo. “In particular, a series of strong storms have brought significant amounts of rain and snow during January. We hope conditions remain wet. Regardless, we must be prudent as we develop our initial CVP water allocation since we know that weather patterns can change.”

As of Jan. 18, DWR reported that the Northern Sierra 8-Station Precipitation Index Water Year total was 46.2 inches, which is about 201% of the seasonal average to date and 92% of an average water year (which is 50.0 inches). The San Joaquin 5-Station Precipitation Index Water Year total was 35.5 inches, which is 204% of the seasonal average to date and 87% of an average water year (which is 40.7 inches).

As required by the exchange and settlement contracts, an initial declaration of whether 2017 is a Shasta critical year will be announced on or before Feb. 15. Water supply updates will be made monthly or as appropriate and will be posted on the Bureau’s website at http://www.usbr.gov/mp/cvp-water.