salmon habitat – Enviro Updates

SuzanneFebruary 12, 2025February 17, 2025Habitats, Water, WildlifeEel River, Lake Mendocino, PG&E, Potter Valley diversion, Russian River, salmon, salmon habitat, Scott Dam, water flows, watersheds

Historic pact reached on future Eel River water flows into Russian River

Mary Callahan, PRESS DEMOCRAT

A historic agreement has been reached to manage water flow from the Eel River to the Russian River.
The deal establishes limits on diversions, focusing on fish protection.
Water rights are transferred to the Round Valley Tribes, supporting river restoration efforts.

Officials from three counties and the Round Valley Indian Tribes have reached a historic agreement that paves the way for continued diversions from the Eel River to bolster flows in the Russian River.

The agreement represents a critical development for anyone whose water comes from the Russian River.

The complex accord resulted from years of negotiations to preserve supplemental flows in the Russian River, the water lifeline for residents, ranchers and wildlife in Sonoma and Mendocino counties. The agreement also supports the restoration and fish recovery in the Eel River, which was crucial to securing support from environmental interests, tribes and Humboldt County residents.

It is, at last, the “two-basin solution” envisioned by regional stakeholders in 2019 and even earlier, when Pacific Gas & Electric first raised questions about whether to continue operating the small, aging hydroelectric plant in Potter Valley through which Eel River flows have been redirected.

The utility is now on track to decommission the plant, tear down Scott Dam, which impounds Lake Pillsbury in Lake County, and Cape Horn Dam 12 miles downstream, where Eel River water has long been diverted.

SuzanneDecember 20, 2024December 27, 2024Habitats, Water, WildlifeChinook salmon, fish hatchery, salmon habitat, San Pablo Bay, Sonoma Creek, Sugarloaf Ridge State Park

Spawning Chinook salmon return to Sonoma Creek in wake of recent storms

Martin Espinoza, PRESS DEMOCRAT

Copious early rainfall and efforts aimed at restoring local salmon and steelhead trout habitat have made such scenes possible, local ecologists say.

A female Chinook salmon swam steadily against the current in a shallow section of Sonoma Creek as several male fish splashed about behind her, jockeying for position, waiting for her to lay her eggs.

Just a few yards downstream on Wednesday, near the bank of the creek, another female rolled onto her side and smacked the gravel and rocks with her tail, doing her part to dig a “redd” or nest as the current flushed away silt and sediment that can be harmful to egg development.

This spawning scene for Chinook, or king salmon, in the headwaters of Sonoma Creek within Sugarloaf Ridge State Park is an uncommon sight for most local residents.

But since late November, hundreds of Chinook have traveled up the watershed from San Pablo Bay and been spotted in numerous tributaries that drain Sonoma Valley and its surrounding elevations.

Heavy rains in November and December have created ideal stream flows that have allowed spawning salmon to make their way into the region’s headwaters, said Steven Lee, research program manager of the Sonoma Ecology Center, which monitors the health of the Sonoma Creek watershed.

SuzanneSeptember 2, 2024February 17, 2025Water, Wildlifegroundwater, salmon habitat, stream dewatering, streams, water flows, well monitoring, well ordinance

Court orders Sonoma County to ensure groundwater pumping doesn’t harm streams and fish

Ian James, LOS ANGELES TIMES

Every year in Sonoma County, steelhead trout and coho salmon return to spawn in creeks along the Russian River that are fed by groundwater.

Environmental advocates have long urged the county to adopt measures that would prevent groundwater pumping and well drilling from drying up these streams and damaging vital fish habitat.

Now, a Sonoma County Superior Court judge has sided with environmental groups, ruling that the county violated state law and failed to meet its obligations to protect so-called public trust resources when officials adopted rules for wells under an amended local ordinance.

“We have long known that excessive well pumping can harm our public trust resources, such as salmon and steelhead,” says Don McEnhill, executive director of the nonprofit group Russian Riverkeeper. “We’re seeing major degradation in habitat.”

SuzanneJune 9, 2024June 24, 2024Habitats, Water, Wildlifeendangered species, salmon habitat, salmonids, watershed restoration

Salmon and the subsurface

David Dralle, Gabe Rossi, Phil Georgakakos, Jesse Hahm, Daniella Rempe, Monica Blanchard, Mary Power, Bill Dietrich, and Stephanie Carlson, CALIFORNIA WATERBLOG

Our central hypothesis is that we will not recover salmon abundance without recovering a diversity of paths through the watershed and through the life cycle and, moreover, that the strategies that are missing or only weakly contributing today are ones that relied on the mainstem and other non-natal habitats for rearing / as stop over sites…

You’ve probably noticed that some streams flow year-round while others are seasonally dry, despite receiving similar amounts of rainfall. Through a recent NSF-funded effort (“Eel River Critical Zone Observatory”), we learned several things about how landscapes filter climate to produce such diverse flow behavior–and the implications for how salmon live their lives.

Our 25-year field study revealed that belts of California’s Eel River watershed underlain by different geologies have different Critical Zones (CZs) – Earth’s permeable surface layers from the top of the vegetation canopy down to fresh bedrock, where water can be stored and exchanged.

SuzanneMay 7, 2024May 8, 2024Water, WildlifeArmy Corps of Engineers, Coyote Dam, endangered species, Endangered Species Act, flood control, Lake Mendocino, Russian River, salmon habitat, sediment, water supply

Federal judge: Russian River dam releases are violating Endangered Species Act

Andrew Graham, PRESS DEMOCRAT

A federal judge ruled Monday that the U.S. Army Corps of Engineers has violated the Endangered Species Act by disturbing salmon populations through flood-control releases from Coyote Valley Dam into the Russian River.

Those releases, which relieve pressure upstream from the 66-year-old dam during rainy months, kick up sediment from the bottom of Lake Mendocino, a reservoir that serves as critical water storage for Sonoma County.

The sediment increases turbidity in the river that harms and harasses coho and chinook salmon and steelhead trout in violation of the Endangered Species Act’s mandate to protect the imperiled species, U.S. District Court of Northern California Judge Jacqueline Scott Corley ruled.

Corley ruled on a lawsuit brought by Sean White, who has spent much of his career involved in the Russian River in one way or another, serving as general manager of the Russian River Flood Control and Water Conservation Improvement District before moving in 2015 to direct sewage and water services for the city of Ukiah.

White brought the lawsuit as a private citizen. The Endangered Species Act, one of the nation’s bedrock environmental laws, allows for citizens to sue governments, businesses or individuals they believe to be violating the act.

SuzanneMarch 1, 2024March 1, 2024Habitats, Watercoho, endangered species, Laguna de Santa Rosa, migratory birds, salmon habitat, vernal pools, watershed restoration, wetlands ecosystem

New restoration plan for Laguna de Santa Rosa

Laura Hagar Rush, SEBASTOPOL TIMES

The Laguna de Santa Rosa held an open house on Wednesday, February 21, to celebrate the release of the Laguna de Santa Rosa Restoration Plan. Funded by a grant from the California Department of Fish and Wildlife with matching funds from Sonoma Water, this document examines six potential restoration projects in the Laguna de Santa Rosa watershed.

Presented by Neil Lassettre of Sonoma Water and Scott Dusterhoff of the San Francisco Estuary Institute (SFEI), this plan was several years in the making.

“So six years ago, we were here with folks from the public, many of you here in this hall, saying ‘Well, we were going to do this restoration planning effort.’ And here we are six years later, unveiling this restoration plan to you all. So this is really an exciting time for us,” Dusterhoff said.

Dusterhoff explained the two major phases of the project this way: “The first component was developing an understanding of how the Laguna used to look and how it used to function and the habitats that it was supporting. So that’s developing an understanding of the historical ecology,” he said. “And then after we understand how the Laguna used to look and how it used to function, we can understand the landscape change—so the magnitude of change from what was to what is. So that was part number one. Part number two then was using that information to develop this long term restoration vision—this long term idea of all of the habitats we want to bring back in the Laguna. So then, we took that vision and we dove deep on a few areas, and we came up with this master restoration plan,” he said.

SuzanneNovember 17, 2023November 19, 2023Habitats, Water, Wildlifedams, Eel River, Lake Mendocino, Lake Pillsbury, PG&E, Potter Valley diversion, salmon, salmon habitat, steelhead

PG&E formalizes plan to take down dams on Eel River

Mary Callahan, PRESS DEMOCRAT

In a landmark moment, Pacific Gas & Electric Co. formalized its plans to tear down two more-than-century-old dams on the Eel River — removing the barrier that forms Lake Pillsbury, freeing the waters of the river and restoring the lake footprint to a more natural state.

The moves are part of a 94-page draft surrender application submitted to federal regulators and made public Friday as part of the utility’s plan to decommission its Potter Valley powerhouse and all the infrastructure that comes with it — including Scott and Cape Horn dams, sited slightly downstream.

PG&E has said work deconstructing the dams could begin as early 2028, depending on regulatory approval and environmental review of the plan.

Scott Dam, built in 1921, would come down first, either in phases or all in one season.

Pacific Gas & Electric Co. initial draft plan

The plan fulfills long-held dreams of conservationists and fishery groups to see the cold, clear headwaters of the Eel River, part of the Mendocino National Forest, reopened to migrating fish and to restore natural river flows in hopes of reversing the decline of native fish stocks.

Environmental Center of Sonoma County

Tag: salmon habitat