As each passing storm delivers more snowpack to the mountains and fills many California reservoirs to above-average levels, operators of the federal Central Valley Project remain cautious about projecting agricultural water supplies for the coming year. In preparation for its initial 2017 water supply announcement, expected next month, the U.S. Bureau of Reclamation, which operates the CVP, released an update of water conditions for its reservoirs. The largest, Shasta Lake, stood at 82 percent of capacity and 124 percent of average as of last week.