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Reservoir Storage & Operations:

Water supply information provided by Sonoma Water (find more water storage info here).

• Sonoma Valley Sun: Sonoma Water Reports Water Supplies Are High As the Rainy Season Draws To a Close 4/10/25

PG&E and PVP

• RRFC's website page on the PG&E Draft Surrender Application & Decommissioning Plan for PVP. (including public comments submitted.)
• PG&E Submits License Amendment
• PG&E Submits 2025 temporary license flow amendment (flow variance.)
• RRFC's website page on the Partnership.

Uploaded recently:

• Mendocino Voice Opinion: Major earthquake could instantly destroy Scott Dam, scientists warn in op-ed 4/7/25
• Lost Coast Outpost: Farm Bureaus in Russian River Counties Issue Plea to President Trump to Keep the Potter Valley Dams in Place 4/9/25

2025 Russian River and Lake Mendocino Operations

Sonoma Water Agency has submitted Petitions for Temporary Urgency Change (TUCP) to modify the criteria for establishing the water supply conditions and the minimum instream flow requirements for the Russian River watershed that were established by Decision 1610. Read more here.

Lake Mendocino’s Coyote Valley Dam General Investigation Study  

“State and local politicians, tribal officials and representatives from the U.S. Army Corps of Engineers met Friday at Lake Mendocino to formalize a cost-sharing agreement for the Coyote Valley Dam General Investigation Study.”

“A new partnership between three organizations will explore options for raising the dam at Lake Mendocino to boost the water supply supporting agriculture and recreation.”

• Mendocino Voice: New study by three organizations could boost water supply at Lake Mendocino  4/12/25
• Mendo Fever: A new chapter for Lake Mendocino: Dam-raising study officially underway, 4/14/25

State Water Resources Control Board Notice of Proposed Rulemaking on Water Measurement and Reporting Regulations (SB88)- Public Hearing April 16, 2025 & Comments due April 23, 2025

The State Water Resources Control Board is proposing (Notice of Proposed Action) to revise the regulations for measuring and reporting surface water diversions. The proposed revisions require diverters to report data in a standardized format, provide an email address, identify measurement locations, and make other minor accompanying changes. The revisions are needed to align regulatory requirements with the Board’s new online water rights data system, California Water Accounting, Tracking, and Reporting System (CalWATRS). A detailed explanation of the proposed regulation revisions and rulemaking process are available on the Water Measurement and Reporting Regulation Rulemaking webpage.

The Office of Administrative Law (OAL) has published the Notice of Proposed Action, beginning a 45-day comment period on the proposed changes.  Comments are due to the Water Board by 5:00 p.m. on April 23, 2025.  A public hearing will be held on April 16, 2025, at 10:00 a.m. by Zoom only.  Register here.

More information: Maven's NOTEBOOK FEATURE: From paper to progress: The $60 million project transforming California’s water rights data 3/27/25

Sonoma – Marin Saving Water Partnership Eco-Friendly Garden Tour: Sat May 10th 1-4

Whether you’re a seasoned gardener or simply someone who enjoys the beauty of nature, this tour will open your eyes to the endless possibilities of sustainable gardening practices and give you some ideas to bring home to your own space. Many of the gardens on the tour will have educational tables, plant/seed giveaways, demonstrations and more! We can’t wait to see the incredible native gardens in our community and celebrate the beauty of eco-friendly landscaping together. RSVP: https://www.savingwaterpartnership.org/eco-friendly-garden-tour/

In the press:

• CA Water Plan eNews 4/9/25
• Maven's Notebook Weekly 4/6-4/11/25
• Maven's Notebook Weekend Edition 4/13/25
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• PPIC: How to Set Up Groundwater Agencies for Recharge Success 4/7/25
• Union of Concerned Scientists: FIRO to Avoid Water FOMO: How to Save Every Drop with Smart Reservoir Operations in California 4/8/25
• Maven's Notebook: CDFW sees ecosystem engineers at work in beaver restoration pilot projects 4/8/25
• Water Education Foundation (various articles): ‘Really unusual’: New study shows why salmon vanished in NorCal 4/11/25
• Water Education Foundation (various articles): The La Niña that never truly was, is over. Here’s what comes next 4/11/25
• Legal Planet: More state and local attention to financing can advance sustainable groundwater management, 4/11/25