On May 25, 2022, Sonoma Water filed Temporary Urgency Change Petitions (TUCPs) with the State Water Resources Control Board (State Water Board) Division of Water Rights requesting changes to establish a Critical water supply condition in the Russian River. Under critical water supply conditions, the Russian River would have minimum instream flow requirements of 25 cfs and 35 cfs in the upper and lower river, respectively.
This change will allow Sonoma Water to continue the minimum instream flows that the river is currently operating under and preserve water supply in both Lake Mendocino and Lake Sonoma. It will also help avoid violating the Incidental Take Statement for Dry Creek established in the Russian River Biological Opinion.
The current petitions also commit Sonoma Water and its retail customers to a (the cities of Cotati, Petaluma, Rohnert Park, Santa Rosa and Sonoma; the town of Windsor; and Valley of the Moon and North Marin water districts) 20-percent reduction in total diversions from the Russian River between July 1 and October 31 compared to the same time period in 2020.
“The Russian River watershed is facing severe drought conditions for the third year in a row and filing Temporary Urgency Change Petitions is essential to ensure the water supply for more than 600,000 people and the environment in Sonoma and Marin counties,” said Sonoma Water Director James Gore.