Native Fish Society is fighting to recover Oregon's most imperiled wild fish by building a groundswell of public supporter to advocate a Roadmap for Recovery for the Willamette's iconic salmon and steelhead. And we are challenging the management agencies in court, assuring that the legally required recovery actions are implemented in the basin.

Willamette fish provide a multitude of benefits including supporting healthy ecosystems that supply drinking water to our communities, the cultural heritage needs of indigenous people and tribal nations, and commercial and recreational fishing economies. The Willamette River in Oregon flows 180 miles out of the Cascades and Coast Range Mountains to its confluence with the Columbia River in the city of Portland.The river drains 11,487 square miles, nearly 12% of the state, flowing through a wide, fertile valley that is home to 75% of Oregon’s population and is the state’s agricultural powerhouse. The Willamette has been important to many Native American tribes that have relied on the river for millennia for salmon, as a trading hub, and as a source of water and other critical resources.

Restoring natural processes that have been altered by dams will benefit our fish, our ecosystems, and our communities that depend on these homewaters.

The Threat:

Built and operated by the U.S. Army Corps of Engineers, a network of thirteen dams are located throughout the Willamette basin blocking access to critical salmon and steelhead spawning habitat. Adult Chinook and steelhead cannot get over the dams—there are no functioning fish ladders. Juvenile fish struggle to migrate downstream through the large reservoirs and often cannot move past the dams without being forced through turbines.

Along with the physical barriers these dams impose, they further harm fish and the river by altering natural flows, contributing to diminished water quality, and degrading riparian environments.

Because Willamette Chinook and steelhead are listed as threatened under the Endangered Species Act, the Army Corps has a duty to ensure the dams do not jeopardize their survival and recovery. National Marine Fisheries Service issued a complete list of actions in 2008, identified in a Biological Opinion, that the Army Corps must take to protect these species and ensure recovery. The agency said that the critical actions needed to recover Willamette salmon and steelhead are fish passage for adults & juveniles, improved water temps & flows downstream of dams, downstream habitat restoration, and completed Hatchery Genetic Management Plans.

Over ten years later, many of the required actions have not been undertaken. Many of the deadlines in the Biological Opinion and agreed to by the Army Corps have been missed. The result: Willamette salmon and steelhead populations are circling the drain.

In 2018, fewer than 5,000 wild spring Chinook and less than 1,000 wild winter steelhead made it back to the river. This represents just one to two percent of the historic populations that once returned to spawn in the system’s cold, forested streams like the Molalla, Santiam and McKenzie Rivers.

Willamette salmon and steelhead face a high probability of disappearing forever with a ninety-nine percent chance of local extinction in some tributaries. Without drastic action now, we will lose these icons of our landscapes and northwest heritage forever.

Key problems caused by dams:

1) Lack of passage:

In the mid 1900’s, the Corps built a series of thirteen dams throughout the basin with the primary purpose of flood control. These dams failed to provide fish passage along the east side of the Willamette valley, thus blocking access to much of the highest quality habitat in the most historically productive systems. This further diminished a wild salmonid population already stressed by the impacts of hatchery competition, overharvest, and habitat destruction. The North Santiam, once home to an estimated 23% of the Willamette's spring Chinook and 34% of systems winter steelhead, lost an estimated 70% of its anadromous fish habitat with the construction of the Big Cliff and Detroit dams.

For nearly two decades efforts to re-establish Spring Chinook above several of the dams through an adult outplanting ‘trap and haul’ program have provided non-volitional fish passage to the highest quality habitat within the historical anadromous range. Though this program has achieved some success despite the lack of safe downstream fish passage, the population has thus far been comprised purely of hatchery fish. Wild fish will not be utilized in this program until downstream fish passage issues are addressed at the dam. What’s troubling is that these runs are entirely dependent on human intervention and will never meet the definition a self-sustaining population. Only with volitional fish passage can viable, self-sustaining abundance be achieved.

Of key importance is establishing effective downstream passage for juvenile fish attempting to migrate to the ocean. The reservoirs created by dam operations and the lack of safe and effective passage through the dams has been identified in the Biological Opinion as a significant barrier to recovery.

2) Altered flows:

Operation of dams for flood control and other purposes, including hydropower and recreation, have resulted in unnatural flow patterns downstream of Corps projects. Normal operations result in a reduction of natural flows in the spring, when fish need higher flows for downstream and upstream migration and higher summer and early fall flows that can dewater redds when river levels drop in late fall and early winter.

3) Water quality impacts:

Discharge from the dams has resulted in unseasonable water temperatures degrading the aquatic habitat below, diminishing potential for both spawning and rearing of salmon, altering the biological timing of key lifecycle processes, and resulting in high rates of pre-spawn mortality. Operational adjustments at several dams including Detroit Dam have resulted in some improvement to water temperatures in downstream reaches. A Water Temperature Control Tower has been proposed to fully meet the downstream temperature needs of the North Santiam but is significantly behind schedule while a temperature control facility has been built and is operational for Cougar Dam on the McKenzie River.

Our key area of focus for the Willamette River is Hydropower. Learn more about the science behind the 5 H’s and their importance to the revival of wild abundance here.

Our Goals:

Reverse the decline of threatened wild winter steelhead and spring Chinook salmon in the Upper Willamette River basin by:

  • Establishing effective adult and juvenile passage at Army Corps dams with a focus on volitional passage.

  • Improving water quality, specifically temperature regimes, dissolved oxygen, and disease/parasitic loading

  • Securing adequate flows and modifying flow timing.

  • Improve volitional downstream passage for juvenille fish.

    • Draw down Detroit reservoir to the regulating outlets (elevation 1,370') by November 15 and hold until December 15, and prioritize use of the regulating outlets over power turbines for that time.*

    • Draw down Cougar reservoir to the regulating outlets (elevation 1,505') by November 15 and hold until December 15. Maintain Cougar reservoir at minimum conservation pool (1,532') from March 1 to May 1 and prioritize use of regulating outlets over power turbines for that time.*

    • Draw down Lookout Point reservoir to the regulating outlets (elevation 750') by November 15 and hold until at least December 15. Conduct free, ungated spill at Lookout Point dam for 2-4 weeks in spring.*

    • Conduct additional draw down at Fall Creek dam to 685' by April 1 and hold through June 30.*

    • Outplant adult hatchery Chinook salmon above Green Peter dam to study spawning success and juvenile downstream migration through Green Peter.

  • Improve Flows:

    • Re-model OMET (Operational Measures Evaluation Team) alternatives: drawdown of Detroit reservoir from fall through April, run-of-the-river operation at Cougar dam, and run-of-the-river operation at Lookout Point dam without assuming that the Corps must fulfill all authorized purposes of the Project.

    • Re-evaluate and establish new flow targets beyond minimum biological flows before providing water allocation to other water users.

  • Improve water quality:

    • Reduce water temperatures . below Lookout Point and Detroit dams in fall-winter by using the lowest regulating outlets to discharge colder water during draw down operations.*

    • Adopt and strictly follow maintenance schedules and emergency protocols provided by NMFS and ODFW to reduce water quality impacts during such events.*

  • Reform, reduce, or eliminate hydropower operations to eliminate power peaking and benefit listed fish.

  • Approve and follow Hatchery Genetic Management Plans to protect wild fish from hatchery fish and reduce the rates of hatchery fish spawning in the wild. Read more about hatcheries effects here.

  • Conduct a basin-wide assessment to identify anchor habitats and opportunities to correct smaller passage barriers to access those reaches.

  • Fund and implement habitat restoration and improvement in undammed tributaries like the Molalla, Yamhill, Marys, and Coast Fork Willamette.

*Indicates an action that has been included as a requested interim measure in our Preliminary Injunction

How is NFS working to achieve our goal?

We are working on reformations to ensure that harvest and hatchery management of Spring Chinook salmon throughout Oregon coastal rivers does not exceed the biological limits for the population.

Successes & Accomplishments to Date:

  • MAJOR MILESTONE! Congressional directive to Corps to begin disposition study, the first step in deauthorizing hydropower production, included in the Water Resources Development Act of 2022 and signed into law via Defense Authorizations Act. 

  • Worked in alignment with Bonneville Power Administration and the Public Power Council to draft and submit legislative language to deauthorize hydropower production.

  • Bonneville Power Administration (BPA) announces they are suspending funding hydropower-related maintenance and capital improvement projects on the Willamette system.

  • MAJOR MILESTONE! Court order directing the Army Corps to pursue explicit remedies requiring operational changes at 8 dams to benefit fish passage, water quality, and water flows. Implementation began Fall 2021.

  • MAJOR MILESTONE! Corps implements interim measures (outside of our litigation) at several dams with the goal of increasing downstream passage survival and efficiency, improve water quality, and restore degraded habitats.

  • MAJOR MILESTONE! Court rules in favor of Willamette wild fish in our litigation finding that the Army Corps violated all three of our ESA claims.

  • MAJOR MILESTONE! Hydropower decommissioning report requirement for Cougar and Detroit dams included in Water Resources Development Act of 2020.

  • MAJOR MILESTONE! Provision requiring Army Corps to comply with Willamette Basin Review Biological Opinion of 2019 included in Water Resources Development Act of 2020. This requires the Army Corps to prioritize storage water for fish needs, even in water shortage years.

  • Forced the Army Corps to create new operations and maintenance plan for the first time in more than three decades. This plan will require a new Biological Opinion governing the actions required of the agency to recover Willamette threatened salmon and steelhead.

  • Cocreated and lead the Willamette Salmon and Steelhead Recovery Coalition focused on activating members and supporters in advocating for reforms to Corps operations

  • Engaging Congressional offices and bringing delegation attention to fish passage, operational issues, and hydropower reform.

  • Successfully getting the Corps to reassess volitional fish passage at Cougar Dam

  • Beneficial court ruling stating that we are likely to win our case on the merits

  • With conservation partners and River Stewards, requested uplisting of upper Willamette fish to endangered and submitted extensive comments for the NMFS 5-year status review.

  • Shared our Willamette work with broad audiences through presentations and public events including a panel discussion at the Public Interest Environmental Law Conference and through virtual partnership events with our conservation partners.

How Can You Help?

Get involved!

You can help make a difference in protecting the incredible and essential Spring Chinook fish by volunteering, making a donation, or spreading the word about the importance of reviving these vital native fish. Send us a message if you have any questions, or would like to be notified of any upcoming volunteer opportunities and/or Action Alerts for the protection and revival of Spring Chinook on the Oregon Coast.

Northwest Environmental Defense Center, WildEarth Guardians, and Native Fish Society v. U.S. Army Corps of Engineers and National Marine Fisheries Service.. Case 3:18-cv-00437-PK Filed 03/13/18

Preliminary Injunction

Motion for Preliminary Injunction and Memorandum in Support, Case 3:18-cv-00437-JR, Filed 11/30/18

Declaration of Kirk Schroeder In Support of Plaintiffs’ Motion for Preliminary Injunction

Declaration of John Johnson In Support of Plaintiffs’ Motion for Preliminary Injunction

Declaration of Richard Domingue In Support of Plaintiffs’ Motion for Preliminary Injunction

Summary Judgement

Motion for Summary Judgement

Reply Brief - In support of Plaintiffs' Motion for Summary Judgement

Opinion & Order

Injunctive Relief

Plaintiffs' Remedy Proposal

Plaintiffs' Opening Brief on Remedy

Declaration of Richard Domingue In Support of Plaintiffs' Request for Permanent Injunctive Relief

Declaration of Kirk Schroeder In Support of Plaintiffs' Request for Permanent Injunctive Relief

State of Oregon's Motion for Leave to Appear as Amicus Curiae

Brief of Amicus Curiae - State of Oregon in Support of Plaintiffs' Proposed Remedies

Declaration of Jeffrey Ziller - In Support of State of Oregon Amicus Brief

Declaration of Dr. Elise Kelley - In Support of State of Oregon Amicus Brief


Northwest Environmental Defense Center, WildEarth Guardians, and Native Fish Society v. U.S. Army Corps of Engineers and National Marine Fisheries Service


1999 - Chinook salmon and winter steelhead listed as “Threatened” under Endangered Species Act

2008 - Biological Opinion issued by NMFS. NMFS required the Corps to complete numerous actions by specific deadlines in order to recover Upper Willamette Chinook and steelhead. These deadlines would not be met.

2009 - Water temperature and gas level improvements were expected for Detroit and Big Cliff Dams

2010 - Water temperature and gas level improvements were expected for all dams

2014 - Improved passage at Cougar Dam was expected to be complete

2017 - The Corps stopped funding required monitoring efforts

March 2018 - Northwest Environmental Defense Center, WildEarth Guardians, and Native Fish Society file suit against U.S. Army Corps of Engineers and National Marine Fisheries Service

April 2018 - The Corps sends letter to NMFS formally requesting to reinitiate ESA consultation and develop a new BiOp

November 2019 - NFS and our partners file a Preliminary Injunction against the Corps asking the court to direct the agency to immediately implement feasible and achievable operational adjustments to Willamette dams to benefit threatened wild fish.

April 4, 2019 - Preliminary Injunction hearing in U.S. District Court

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