Potter Valley diversion – Enviro Updates

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

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.

SuzanneJuly 16, 2023July 17, 2023Water, Wildlifedam removal, Eel River, endangered species, PG&E, Potter Valley diversion, Russian River, salmon, water supply

Op-Ed: Eel River dam debate echoes nationally

Cameron Nielson & Sarah Bardeen, THE PRESS DEMOCRAT

On paper, California’s Eel River is a prime candidate for restoration.

It’s a remote river that runs through rugged, lightly populated terrain in Northern California. As with many rivers in the region, a combination of logging, overfishing and dams decimated its once-plentiful salmon and steelhead runs. The introduction of a native predator, the pikeminnow, only made things worse.

But some of that could be put to rights: two aging dams in the Eel’s upper reaches are reaching the end of their life span — and one has been declared seismically unsafe. PG&E, which owns the dams, has chosen not to renew their licenses, setting the stage for removal if no new owner steps forward.

Eel River residents overwhelmingly support dam removal, the tribes are adamantly in favor, and a constellation of NGOs is pushing hard for it. If those dams come down, 150 square miles of cold-water habitat will open up to struggling populations of steelhead and salmon, offering needed refuge from the warming climate.

So why is it so hard to get done?

Part of the answer lies in the dam’s history. Part lies in the challenges of coping with a surfeit of aging infrastructure. And part lies in the complexities of who exactly constitutes the river’s community. Finding a solution has implications not just for the state but for the nation.

SuzanneMay 18, 2023July 11, 2023Water, WildlifeEel River, endangered species, Lake Pillsbury, PG&E, Potter Valley diversion, Russian River, salmon, Scott Dam, water diversion

PG&E plans to remove both Potter Valley Project Dams—Mendo, Humboldt, Lake and Sonoma Fight

Sarah Reith, REDHEADED BLACKBELT

A planning group for the Russian River Water Forum, which is preparing for life after PG&E decommissions the Potter Valley Project, met for the first time yesterday in Ukiah. PG&E said in a town hall last month that its version of decommissioning means removing both dams. That’s unless an entity that is capable of running them steps forward before it submits a draft of the decommissioning plan to the Federal Energy Regulatory Commission, or FERC.

Tony Gigliotti, PG&E’s senior licensing project manager, laid out the timeline at a town hall about Scott Dam and Lake Pillsbury on April 27th.

“When we say decommissioning in this case, both dams will be removed as part of that, unless somebody comes forward with a proposal that PG&E looks at and accepts,” he said. “We need to ensure they can operate the dams after we give up ownership. In terms of timelines for the surrender application, there will be an initial draft November, 2023. A second draft, also available for public review, May 2024, and then the final application will be filed with FERC in January, 2025.”

Janet Walther, PG&E’s senior manager of hydro licensing, qualified that timeline a little.

“When PG&E submits our final surrender application to FERC, that would be the point of no return,” in terms of decommissioning, she said. “And really, the draft. We are looking to know, sooner than later, if there’s an entity interested in taking over the dam because that will change our surrender application and what we put in that surrender application. So I think we are looking and would like to see some initial proposals later this year, if there is interest. And we are talking with folks, as we have been since 2016, about potential interest in future ownership of Scott, and/or Cape Horn Dam.”

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.

SuzanneJanuary 10, 2022March 8, 2022Water, WildlifeEel River, endangered species, hydroelectric, PG&E, Potter Valley diversion, Russian River, salmon, Scott Dam, steelhead, water supply

Russian River flows at risk: New studies show potential path forward for Potter Valley project

Mother of All Groups (MOAG), SONOMA COUNTY GAZETTE

PG&E’s license to operate the Potter Valley Project expires in April of 2022. For more information until then: http://pottervalleyproject.org/

A group of studies released last month paint a clearer picture of how Sonoma and Mendocino counties can meet future water needs while reducing environmental impacts in the face of a decision by PG&E to cease operation of an aging hydroelectric power project.

The Potter Valley Project (PVP) is located approximately 15 miles north of the City of Ukiah on the Eel River. The Project’s facilities include two dams, a diversion tunnel and a hydroelectric plant located in Potter Valley in the headwaters of the Russian River. The 100-year-old project produces little electricity by modern standards and is a net money loser, but Sonoma and Mendocino County water users have grown accustomed to the water diverted by the Project which flows from the Eel River into the Russian River watershed where it is stored in Lake Mendocino – ultimately flowing down the Russian River where it benefits agricultural interests and residents.

This arrangement was put in jeopardy when PG&E announced in 2019 that it would not seek to renew its federal license to operate the Project, which expires in April 2022. In recent weeks, PG&E also notified the public that the Project’s powerhouse had suffered a transformer failure, which eliminated its ability to generate electricity and reduced water diversions into the Russian River. Given PG&E’s goal to dispense with the Project, it is unlikely the powerhouse will be repaired or that the Project will ever function as it once did.

In response to PG&E’s decision to divest from the Project, a diverse group of stakeholders called the Two-Basin Partnership was formed to develop a plan to take over and modify the Project in a way that reflects regional needs and priorities in both basins. Among these priorities are fisheries recovery in the Eel River – one of the few major rivers left in California that has the potential to support abundant, self-sustaining wild populations of salmon and steelhead – and water supply reliability for Russian River water users. The Partnership’s proposed plan included the removal of Scott Dam, restoration of the drained Lake Pillsbury footprint and modifications or the replacement of Cape Horn Dam to maintain a diversion.

SuzanneSeptember 22, 2021September 22, 2021WaterEel River, PG&E, Potter Valley diversion, Russian River

Upper Russian River flow decisions being delayed

Rollie Atkinson, SOCONEWS

The long-term picture for reliable water flows in the Russian River, above Healdsburg to Mendocino County, will remain uncertain for at least two more years, if not longer. The hold up stems from ongoing studies and multi-agency negotiations over the future of the Scott Dam on the Eel River and the century-old Potter Valley Project (PVP) that diverts Eel River water into the Russian River and Lake Mendocino.

On Sept. 2, the five-member Two-Basin Partnership asked the Federal Energy Regulatory Commission (FERC) for a one-year abeyance to continue evaluations of a proposed takeover of the PVP from Pacific Gas and Electric (PG&E) which has announced it will not renew its FERC permit after 2022. The Two-Basin Partnership is seeking removal of the Scott Dam but continued Eel River diversions into the East Fork of the Russian River. The proposal would add 288 river miles of access to salmon and steelhead while assuring an annual diversion of 62,500 acre/feet of water.

The partnership is citing a shortage of funds to operate the PVP and said last week “we have made substantial efforts but have not yet secured public and philanthropic funds for that work.” In May, PG&E declined to fund the project and by statute the utility is barred from seeking a new license.

SuzanneJune 25, 2021July 4, 2021WaterEel River, endangered species, Lake Mendocino, Potter Valley diversion, Russian River, water supply

Limbo for Mendocino County water transfer clouds outlook for key Russian River source

Mary Callahan, PRESS DEMOCRAT

The Russian River’s sprawling, manmade delivery system for drinking and irrigation water has for decades relied on a share of the flow in the Eel River, miles to the north in Lake County.

In years past, up to 22 million gallons have been siphoned from the Eel through a system of pumps, pipes and reservoirs and sent south into the East Fork of the Russian River through a mile-and-a-half tunnel blasted into a mountain more than a century ago.

But the future of that cog in the Russian River machine, long seen as critical for farmers, ranchers and rural residents reliant on the river in Mendocino County and northern Sonoma County, is now in limbo.

The water transfer also has generated hydroelectricity as it passed through a small powerhouse in rural Potter Valley and on into Lake Mendocino near Ukiah.

Efforts by federal fisheries regulators to bolster declining salmon and steelhead runs in the Eel River have slashed those diversions in half since 2007. And the drought cut those diversions by another fifth this year, as water regulators seek to maintain supplies in Lake Pillsbury, formed by a dam across the Eel River.

They may be eliminated permanently in the future as a result of PG&E’s decision not to renew its license for the 113-year-old Potter Valley powerhouse when it expires next year, leaving the state of all water transfers from the Eel River uncertain.

SuzanneApril 23, 2021April 23, 2021Water, WildlifeEel River, lampreys, Potter Valley diversion, salmon, steelhead, Wiyot

Eel River to some, Wiya’t to the tribe that fishes it

Arthur Dawson, PRESS DEMOCRAT

The Eel River runs through Lake, Mendocino, and Trinity counties before reaching the Pacific Ocean in southern Humboldt County. Its name was given by Josiah Gregg in 1850 as he was exploring and looking for land to settle. Coming upon a group of Indigenous Wiyot fishermen, he traded a frying pan for some Pacific lampreys, which he mistook for eels.

Those Wiyot fishermen had probably been up most of the night — a good time for catching lamprey. Some of the best fishing spots were in the breaking waves at the river’s mouth. Waving redwood-splinter torches over the water, they attracted the lamprey with the flames. With quick reflexes and a carved stick, they snatched them from the water. And because lampreys are so slippery, the Wiyot twirl them over their heads before setting them on dry ground — otherwise they can slide off back into the river.

Environmental Center of Sonoma County

Tag: Potter Valley diversion