by Kara Glenwright, CalTrout Communications Associate
Dr. Ann Willis currently serves as the California Regional Director for American Rivers. Her former position was Senior Research Engineer at the UC Davis Center for Watershed Sciences.
While dam removal on the Klamath River is now certain, what happens after the dams come out is less certain. A dam removal and river restoration project of this scale has never been done before. As a scientist, Dr. Ann Willis is excited to see just how dramatically we may have underestimated the potential of the Klamath once the river is freed.
“These rivers are so complex. The different pieces of them come together in such a mysterious and miraculous way. It’s foolish to try and predict the outcome of [dam removal], and I think it’s almost more magical to be surprised by it and to choose to be open to learning what we don’t know,” Willis said.
As a former Senior Research Engineer at the UC Davis Center for Watershed Sciences, Willis spent much of her time researching California rivers to inform statewide water management. Her research delved into watersheds across the state including the Shasta River, a tributary to the Klamath River, and the Little Shasta River which feeds into the Shasta. Both the Shasta and Little Shasta rivers are located within the larger Klamath River watershed. Today, Ann serves as California Regional Director for American Rivers where she will continue important watershed work across the state.
“Dam removal [on the Klamath] is exciting because it’s such an obvious next step,” Willis said. In addition to the economic unviability of the Klamath River dams, infrastructure that cannot be maintained is risky, she added. Unmaintained dams can pose significant public safety threats. And the benefits that dam removal can provide for rivers are tremendous – not just in the Klamath, but in its tributaries as well.
“When you consider how disruptive dams are on rivers, and how rapidly we’ve seen rivers recover after dam removal, my sense is that all the benefits that we see in the Klamath will also translate to benefits in the Shasta. You’re going to have more pieces of this ecological puzzle that are functioning, and when we put these pieces together, they really outperform as a group what they do individually,” Willis said.
Historically, the Shasta River contributed about 1% of the total annual flow to the Klamath River. But not all streams are created equal, and some have a much greater ability to support cold-water ecosystems and the fish that depend on that cold water, Willis explained. Of the salmon that make their way into the Klamath River, the Shasta historically contributed about 50%.
“It’s useful to recognize that some tributaries have a huge impact, even if they are relatively modest in terms of their flow contributions and the amount of habitat they provide, because it helps us focus our efforts on a place where we can really have an impact,” Willis said.
In Northern California, CalTrout collaborates with Willis and UC Davis on several different projects including work in the Upper Shasta and Little Shasta rivers. In the Shasta watershed, science plays an integral role in guiding the community through difficult water management questions. Because so much of the watershed is privately owned (roughly 80%), the only way to achieve large scale conservation success is to work directly with these landowners, Willis explained.
In the Little Shasta, Willis first got involved with CalTrout’s work partnering with the Hart Ranch. Sections of the river had run dry, and the project was able to improve irrigation efficiencies on the ranch to leave more water instream in those dry sections of the river.
While most rivers are fed by either snowmelt, rain, or springs, the Little Shasta is fed by all three. This makes the river a dynamic habitat that can support many different types of ecosystems, and its diversity is resilient to local disturbances and bigger ones like climate change. “You’re in a place where normally if fish were to get stuck, there aren’t a lot of opportunities for them to persist,” Willis said. “The Little Shasta provides opportunity.”
In the Upper Shasta, Willis and UC Davis worked with CalTrout and rancher Frank Cardoza to improve his ranch’s diversion to be more efficient and ecologically friendly. The improvements included opening up passage to some of the most important cold-water tributaries on the portions of the Upper Shasta that run through Cardoza’s property.
“I went on a tour with [Frank Cardoza], regulators, and other landowners, and [Frank] spoke specifically about these projects,” Willis recalled. “He said they changed his life. Efficiencies have made things easier and more manageable for him to do what he wants to do while also being aligned with the environment — and that was so meaningful to him.”
For too long, the dominant mindset viewed rivers through an extractive lens — something to take, something to use, and something to extract value out of without recognizing the inherent value that rivers offer, Willis said. Through CalTrout and UC Davis’s work to restore rivers and connect communities with them, Willis hopes we can convey that the landscape isn’t an “other”. Natural spaces are not separate from how we live our day-to-day lives, but instead they are all part of an environment that we are participating in. Within human community, this shift in how individuals view natural places is not necessarily new, especially within Indigenous Californian communities.
“I was raised and educated with language that referred to rivers as resources, but others might say they were raised to see rivers as relatives. Seeing that recognition of a different perspective, and the buy in and truth to the reality of that perspective, gives me a lot of hope,” Willis said.
Having healthy functioning ecosystems, watersheds, and fish populations will enhance the health of our human communities and our human livelihoods. And there is perhaps no better case study for this than on the Klamath.
“I can’t begin to tell you how excited I am to see the Klamath dam removal because I believe it is going to validate what we have come to advocate about rivers — that free rivers function better and that free rivers can heal communities and ecosystems,” Willis said. “We’ve never seen anything happen on this scale, and as scientists we have almost always underestimated what we think the outcomes will be. I’m so eager to learn how this plays out.”
December 14, 2022
Don’t make the mistake many environmentalist make when they remove a dam on a trout stream.
When a dam is removed – all of the collected mud, sediment, debris, junk, etc. from many decades will be also released. When that material is released in mass it will cover all of the gavel spawning beds and insect life and the “new” down river below the dam will become a ‘waste land’ for trout & salmon and insect life for decades and the fly fishing will be destroyed as well. River Guides be prepared for disappointing fly fishing results after dam removal.
I know from experience when this was done on a famous Michigan trout stream. I was an officer on the Board of Michigan Trout, and a member of “Anglers of the AuSable”, West Michigan TU, and several Michigan Fly Fishing clubs, etc. I am a Life Member of FFI and TU. I was the only one on the board who strongly cautioned about the immediate removal of the dam on the Ausable River. I predicted a disaster and guess what? ~ I was right. No one would listen to engineering wisdom – the dam was removed and fly fishing has been a disaster for many, many years. All of the holes, runs, channels, spawning beds, riffles, and insect beds were covered with sediment and that suffocated the insect life. The down stream water temperature increased almost 10 degrees for many years after the dam removal. The state and environmental groups paid for dredging & tree planting after the fact to mediate the mess that occurred. True, eventually the river will all come back to normal – decades later. I have fly fished the Klamath River many dozens of times over past years and I love the river. I am not looking forward to fishing it in coming years after the dams are removed, unless those in power and control take appropriate ACTION!
As a degreed engineer, I predict dire consequences for fly fishing on the Klamath River unless you do the following appropriate action:
1. Release the’ dammed up’ water very slowly! – over the course of one to two years – not weeks or months.
2. Plant erosion control trees, shrubbery, willows, etc., and install other erosion devices along the bank of the newly exposed stream bank (prior under water stream bed) and also along the bank below the old dams, because the water level will be much higher due to sediment, especially during spring run-off.
3. Be prepared to go into the river below the old dam sites – with back hoes, cranes, etc. on shallow water barges, etc. to dredge out the sediment that filled up all the holes, channels, runs, etc. because they will all be filled up and covered with debris and the river level will be higher causing more bank erosion.
4. Whatever other ideas ‘wise men can think of’ to mediate this event and issues.
I wish Cal Trout, Trout Unlimited and others well in this endeavor, but unless you find a way to mediate the above facts of river life, you will have destroyed good tail water fly fishing for decades below the present dams. I read all about the effort to remove the dams, but I do not hear or read anything about how you are going to prevent the dam disaster when the water is released from the dams. What are you planning on doing to prevent this?
I hate to be the “Canary in the Mine” or the “I told you so” fly fisherman; however, I hope you and others will not turn a blind eye to these facts and will address these issues before the fact rather than after the fact. Only then will you have a chance of salvaging good fly fishing on the Klamath River in the near future after dam removal.
Lots of Strikes & Tight Lines,
Gene ~ B.S., BSE, MSE
Thank you for your comment, Eugene. We like to hear that members of the public are involving themselves in projects like these and want to ensure that they are done right.
Please trust that CalTrout and partners are following best practices and relying on sound scientific data and past examples of dam removal to ensure that the removal of the Klamath dams has the least amount of impact on fish, the rivers, angling, and the surrounding communities. We do not take these projects lightly and have been working on this endeavor for over 20 years. Our team of restoration experts and scientists are ones to trust. We understand that a science-based approach for dam removal is critical. Dr. Rob Lusardi, the California Trout-UC Davis Wild and Coldwater Fish Scientist, has been researching the Klamath River for many years. His research is discussed here: https://therevelator.org/klamath-dam-science/, and an interview from him on the Klamath is here: https://caltrout.org/voices-of-the-watershed/robert-lusardi.
Please see the following link for more information as well:
Independent Peer Review Says Klamath Dam Removal Science “Sound” and “Reliable”: https://caltrout.org/regions/mount-shasta-klamath/independent-peer-review-says-klamath-dam-removal-science-sound-and-reliable (this is from 2012, though still relevant)
The following links are to papers and studies on Klamath dam removal, completed by CalTrout’s partners. Please click on the PDFs next to ‘file’ to access them:
LOWER KLAMATH PROJECT SEDIMENT DEPOSIT REMEDIATION PLAN: https://ifrmp.net/file/lower-klamath-project-ferc-project-no-14803-sediment-deposit-remediation-plan/
LOWER KLAMATH PROJECT RESERVOIR DRAWDOWN AND DIVERSION PLAN: https://ifrmp.net/file/lower-klamath-project-ferc-project-no-14803-reservoir-drawdown-and-diversion-plan/
KLAMATH DAM REMOVAL OVERVIEW REPORT: AN ASSESSMENT OF SCIENCE AND TECHNICAL INFORMATION: https://ifrmp.net/file/klamath-dam-removal-overview-report-for-the-secretary-of-the-interior-an-assessment-of-science-and-technical-information-2/
KLAMATH DAM REMOVAL SCIENCE COORDINATION WORKSHOP SUMMARY REPORT: https://ifrmp.net/file/klamath-dam-removal-science-coordination-workshop-summary-report/
I read a recent article on the removal of a dam out east where they hired barges and removed the mud, sediment, debris, etc. with cranks on the barge above the dam before the dam was breached which resulted in much improved conditions vs. other dam removal projects. I encourage those in control of this removal also hire barges to remove the soil, etc. behind the dam before the removal occurs. Looking for a favorable outcome. All the Best – Gene ~ BS, BSE, MSE