1. Water Supply: Early Precipitation Below Average, Don Pedro Above Historical Storage Chris Fisher, Assistant General Manager of Water Operations, reported that the Tuolumne River watershed received about 31 inches of precipitation in the 2026 water year, roughly 90% of its historical average. Don Pedro Reservoir held approximately 1.47 million acre-feet, or about 73% of capacity and 113% of its historical average for the date. The reported water level was about 4 feet lower than at the same time last year; staff cited an uncapped irrigation allocation, one of the warmest Marches on record, and approximately 2,400 acre-feet supplied to the GRP program. Early precipitation in the new water year stood at 1.8 inches, or 71% of average. An approaching storm could bring high-elevation snow above 7,000 feet.
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