Our Work

Bay-Delta Plan released: On August 19, 2026, the State Water Board released the almost-final version of the update of the Bay-Delta Plan. The Plan allows the vast majority of water right holders in the Bay-Delta watershed from Stockton north to skate under “voluntary agreements” that marginally increase flows compared to existing conditions. Comments on the…

For two years, I did not fish once. For someone who spends most of his waking life trying to make conditions better for California’s fish, this is not the desired condition. I had the chance to partially correct this sorry situation this August when I returned to the Bridgeport (Mono County) area to fish a…

The spike-toothed salmon (Oncorhynchus rastrosus) was a roughly 7-foot-long species that lived along the Pacific Coast and Japan five million years ago. This history of this species, particularly its evolution and extinction, reveals that it is difficult to predict the results of climate change.  Data from spike-toothed salmon fossils, reviewed with information from biological studies…

Last month, I was back in the Silver Fork American River watershed, roughly 6 miles east of reaches covered in my previous article. The outing inspired me to write a sequel. But before I give you the skinny on the trip’s fly-fishing adventures, there is a bit of business to discuss. The Silver Fork American…

California is world-renowned as an environmental leader. Yet agencies are reluctant to enforce laws that ensure people and fish have clean water. Those who advocate for salmon recovery and track agency performance on reversing damage to aquatic ecosystems can attest: the enactment of environmental regulations does not guarantee that those laws will get enforced. Enforcement…

A July 11, 2026 article in Valley Ag Voice reports that Adam Nickels, acting Regional Director for the California-Great Basin region of the Bureau of Reclamation, is on record as proposing to improve “water supply reliability” by “updating” Water Rights Decision 1641. The article quotes Mr. Nickels as follows: “We actually know today that D-1641…

On July 22, 2026, the State Water Resources Control Board (State Water Board) held a workshop about Draft Guidance on designating Tribal Beneficial Uses (TBUs). The phrase “designating TBUs” means the State will officially identify and recognize specific tribal uses. The State will also call out specific water bodies in which those uses are explicitly…

Summertime allows me to venture into the high country of the Sierra Nevada mountain range and assess river and stream conditions for CSPA. Last week, I made my way up to the Silver Fork American River. The El Dorado Hydroelectric Project (Federal Energy Regulatory Commission Project no. 184) controls summer flows in the Silver Fork.…

In the mid to late 1980s, the Great Lakes region began addressing the spread of zebra and quagga mussels. These two species are not native to the U.S. They have done an enormous amount of ecological damage in the Great Lakes and their tributaries. The federal government and States in the Great Lakes region have…

One of the hats I wear at CSPA involves using the Federal Energy Regulatory Commission’s (FERC) relicensing of hydroelectric projects to improve conditions for some of California’s most cherished rivers and streams. I recently took on the North Fork Stanislaus Hydroelectric Project, FERC Project no. 2409. Last week, I decided to head back into the…

A funny thing happened on the way to the Capitol. On July 1, 2026, the author pulled Assembly Bill 2215, against which I was about to testify in a state Senate committee. If enacted, AB 2215 would have given the California Department of Water Resources (DWR) a special deal. It would have given DWR’s State…

This summer, the Ninth Circuit Court of Appeals denied the Trump Administration’s attempt to subordinate the needs of keystone species to private water contracts. The Court issued a summary judgment on June 17, 2026. Its opinion, authored by Justice Ronald M. Gould, stated that the Klamath Project operator, the U.S. Bureau of Reclamation (BOR), must enforce the…

https://mavensnotebook.com/2026/06/23/press-release-political-pressure-on-sites-reservoir-doesnt-change-the-facts From the San Francisco Baykeeper and the California Sportfishing Protection Alliance: In an overt act of political meddling, Governor Newsom and his deputies are pressuring a judge to retract her evidence-based findings on the Sites Reservoir Project The evidence shows the multi-billion-dollar Sites Reservoir project cannot operate as proposed without unreasonable harm to rivers, fish, and ecosystems.…

You may have seen golden mussels mentioned on your local news or on the website of a state agency. Wherever you heard of them first, you are now aware that California is at the beginning of a long fight. The objective is to protect waterways and water infrastructure from a takeover by golden mussels.  The…

The Marin Municipal Water District (Marin Water) is a public utility that provides water to 190,000 residents in central and south Marin County. Marin Water is proposing what it terms an “Atmospheric River Capture (ARC) Project” to divert rainwater from atmospheric river events (rainstorms) during the North Bay’s rainy season. The publicity for the Project…