Lake Mendocino – Enviro Updates

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.

SuzanneApril 21, 2024April 22, 2024Waterdrought, Eel River, Lake Mendocino, Potter Valley diversion, Russian River, water storage

Op-Ed: Diversion won’t guarantee a healthy Russian River

Don McEnhill and Ed Burdett, PRESS DEMOCRAT

When PG&E announced that it would remove Scott and Cape Horn dams on the Eel River as part of the Potter Valley hydroelectric project decommissioning, it put a continuing water diversion to the Russian River in question.

A Press Democrat editorial praised Eel and Russian River stakeholders coming together to endorse the possibility of a new fish friendly diversion from the Eel River (“Progress toward water security,” March 27), and we at Russian Riverkeeper concur. However, a continued diversion from the Eel River is not a solution in and of itself when it comes to ensuring long-term water reliability in the upper Russian River watershed. A continued diversion will not solve all the region’s water issues.

Russian Riverkeeper, a Healdsburg-based nonprofit organization founded in 1993 to ensure that river water is drinkable, swimmable, fishable and equitably shared, is supportive of the effort to create a wintertime diversion that allows salmon and Pacific lamprey in the Eel River maximum recovery potential, while still making surplus flows available to the Russian.
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The Russian River in Monte Rio on Feb. 5. (BETH SCHLANKER / The Press Democrat)
Close to Home: Saving rainwater for sunny days to come

At the same time, we don’t advocate putting all our eggs in one basket by solely relying on a diversion from another river.

SuzanneApril 17, 2024April 17, 2024Waterdrought, flooding, Lake Mendocino, Lake Pillsbury, Lake Sonoma, water supply, weather forecasts

Op-Ed: Saving rainwater for sunny days to come

Grant Davis, PRESS DEMOCRAT

The current water year, which began Oct. 1, has been wetter than usual, with the Russian River watershed accumulating 119% of the yearly average rainfall, totaling 49.38 inches since October.

In the past, we might have celebrated our good fortune and watched lake levels rise only to watch much of it sent downriver to the Pacific Ocean as reservoirs reached an inflexible upper threshold. Today, we get to continue enjoying that ample rainfall long after summer sunshine arrives.
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Grant Davis

With almost a decade of data under its belt, the Russian River Forecast-Informed Reservoir Operations program has been making great strides by demonstrating the viability of this strategy to operate reservoirs more effectively using modern technology and forecasting.

This year, we expect the new method to ensure an additional 19,000 acre-feet of water in the Lake Sonoma reservoir heading into the summer, just as it did last year, thanks to our ability to leverage weather forecasting techniques and adapt how we manage our reservoirs. Add to that another 9,000 acre-feet stored in Lake Mendocino. An acre-foot equates to 325,851 gallons.

That 28,000 acre-feet represents a substantial savings, or almost 65% of Sonoma Water’s annual demand, given that the agency is projecting its three-year average annual water sales to be just under 43,000 acre-feet.

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.

SuzanneAugust 7, 2023November 6, 2023WaterEel River, endangered species, Lake Mendocino, Potter Valley diversion, salmonids, water supply

Sonoma, Mendocino county water managers propose pathway for continued Eel River diversions

Mary Callahan, PRESS DEMOCRAT

Water managers in Sonoma and Mendocino counties seek to preserve water transfer infrastructure as part of PG&E license surrender for Potter Valley power plant.

Water managers in Sonoma and Mendocino counties have submitted a conceptual proposal to PG&E to buy and maintain portions of the utility’s defunct Potter Valley power plant to enable future water transfers.

The move would be a critical step toward preserving seasonal diversions of Eel River water to supplement supplies in Lake Mendocino and the Russian River.

Working with the Mendocino County Inland Water and Power Commission and the Round Valley Indian Tribes, the Sonoma County Water Agency is seeking to preserve elements of the power plant through which water is channeled from the Eel River to the East Fork Russian River. No electricity would be generated as a part of the plan.

Pacific Gas & Electric has planned to surrender its license for the 1908 plant with the intent of decommissioning it. Without a proposal to save it, the diversion infrastructure would eventually be removed, leaving upper Russian River communities and agriculture users without sufficient water.

SuzanneMay 27, 2022June 6, 2022Waterdrought, Lake Mendocino, Lake Sonoma, Russian River, water supply

Sonoma Water petitions state for critical water condition for Russian River as severe drought enters third consecutive year

SONOMA WATER

On Wednesday, May 25 Sonoma Water (Sonoma County Water Agency) filed Temporary Urgency Change Petitions (TUCP) with the State Water Resources Control Board to establish a Critical water supply condition for both the upper and lower Russian River as the drought continues.

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. If approved, 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.

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.

SuzanneApril 18, 2022April 19, 2022Water, WildlifeEel River, endangered species, Lake Mendocino, Potter Valley diversion, Russian River, salmon, steelhead, water supply

Fishery groups plan to sue PG&E over Potter Valley plant and related Scott, Cape Horn dams

Mary Callahan, THE PRESS DEMOCRAT

A coalition of fishery groups has formally notified PG&E that it plans to file suit under the Endangered Species Act, alleging the continued injury to once abundant federally protected salmon and steelhead trout as a result of operations at the utility’s aging Potter Valley powerhouse.

The legal maneuver is part of an effort to expedite removal of Scott and Cape Horn dams, which pose a threat to vulnerable fish species in the Eel River and block access to hundreds of miles of prime habitat upstream.

The plaintiffs contend that last Thursday’s expiration of PG&E’s license for the project means the utility is no longer protected from liability and must be found in violation of the Endangered Species Act — a point the utility disputes.

A formal notice filed Friday by the coalition gives PG&E 60 days to remedy the situation or face litigation. It also echoes comments about project inadequacies made in a March 16 letter from the National Marine Fisheries Service to the Federal Energy Regulatory Commission in advance of the expiration of the utility’s license.

SuzanneAugust 31, 2021September 5, 2021WaterHealdsburg, Lake Mendocino, Russian River, UWMP, water supply, water use

Healdsburg residents call for more specific Urban Water Management Plan

Katherine Minkiewicz-Martine, SOCONEWS

The city of Healdsburg’s draft 2020 Urban Water Management Plan (UWMP) is still a work in progress.

The sentiment was echoed by community members and city council members during a recent council workshop and review of the plan where people expressed concern that the plan is a bit too broad and doesn’t adequately consider climate change in its analysis.

There were also concerns centered around the data points used to inform the plan, especially water usage data, which is not segregated into single family home usage and multi family home usage.

“What we’ve assembled is forecasted demand and supply for a 25-year period. This is a really high-level overview of the city’s supply and demand needs,” Healdsburg Utility Director Terry Crowley said during the virtual, Aug. 23 city council work session.

The outlook for Healdsburg’s forecasted demand and supply levels doesn’t look too sunny. If there’s a single dry year the city may find itself in a position similar to what we’re experiencing now and considering population growth, by 2045, water supply would not meet demands particularly during the drier years.

SuzanneAugust 2, 2021August 2, 2021Waterdrought, Lake Mendocino, Russian River, State Water Board

Lake Mendocino water levels trigger curtailments for all water rights in Upper Russian River

MAVEN’S NOTEBOOK

Curtailments likely for Lower Russian River within a week

From the State Water Board:

With California experiencing a historic drought amid worsening climate change impacts, the state is responding urgently to address acute water supply shortfalls in affected areas. Water in Lake Mendocino is below minimum storage levels and dropping at an alarming rate, threatening supplies for drinking water and endangered fisheries.

In response, the State Water Resources Control Board issued curtailment orders today to all 861 water right holders in the Upper Russian River. The orders make it illegal to draw or divert water from the Upper Russian River, except as needed to ensure human health and safety.

The State Water Board also released an analysis of the Lower Russian River demonstrating that approximately 222 right holders need to be curtailed to meet demands on the river. The board anticipates issuing orders to these right holders next week.

To maintain flows in the Upper Russian River, water is released from Lake Mendocino, a reservoir north of Ukiah. The supplemental water protects multiple fish species and municipal and agricultural uses, and during drought, accounts for all the water in the river. Currently, about 200 acre-feet is released from the lake into the river each day, enough to meet the needs of 400 households per year.

“The lake is declining much faster than anticipated,” said Erik Ekdahl, Deputy Director for the Division of Water Rights. “If the depletions continue at this rate, the 20,000 acre-feet, end-of-season minimum storage level could be reached almost six weeks ahead of schedule. The lake could be entirely empty by the end of the year, putting both people and wildlife in harm’s way.”
Continue reading “Lake Mendocino water levels trigger curtailments for all water rights in Upper Russian River”

SuzanneAugust 2, 2021August 5, 2021Agriculture/Food System, Waterag water use, drought, endangered species, Lake Mendocino, Russian River, urban water, water diversion, water rights, water storage

State cuts off hundreds of Russian River growers, ranchers and others in drastic bid to save water

Mary Callahan, THE PRESS DEMOCRAT

A day long dreaded by hundreds of ranchers, grape growers, farmers, water providers and towns arrived Monday as the state ordered them to stop diverting water from the Russian River watershed or be fined $1,000 a day.

State regulators issued orders effective Tuesday prohibiting about 1,500 water rights holders in the upper river — including the cities of Cloverdale and Healdsburg — from diverting water in an effort to preserve rapidly diminishing supplies in Lake Mendocino.

The State Water Resources Control Board also announced plans to curtail another 310 claims in the lower river watershed as early as Aug. 9 to try to slow the drawdown of Lake Sonoma. Another 500 or so rights in the lower river region between Healdsburg and Jenner remain subject to curtailment as conditions deteriorate.

The order is enforceable by fines up to $1,000 a day or $2,500 for each acre foot diverted. Violations also could draw cease-and-desist demands that could result in fines of up to $10,000 per day, according to the State Water Board.

The restrictions are part of a sweeping, unprecedented attempt to confront a historic drought that water managers fear could extend into a third dry winter.

That would leave the region to struggle through another year using only the water already captured in the two reservoirs. That water is not just for basic human health and safety. It also must be used to keep the river flowing for fish and other wildlife and provide for water rights holders along the way.

Environmental Center of Sonoma County

Tag: Lake Mendocino