Overview
Dam Removal

Author:
Brook Thompson (Yurok)
Yurok Tribe, Oregon State University, Oregon SeaGrant
Save California Salmon: (SCS) is dedicated to policy change and community advocacy for Northern California’s salmon and fish dependent people. We support the fisheries and water protection work of the local communities, and advocate effective policy change for clean water, restored fisheries and vibrant communities.
Maggie Peters (Yurok/Karuk), NASMC Learning Specialists Humboldt County Office of Education
Grade(s): 6-8
Suggested Amount of Time: Three 55-60 minute sessions
Curriculum Themes
- History
- Relationship to Place
- Cross Curricular Integration
Learning Goals
Analyze - Causes and effects of placing a dam on a river and the effects on river health, salmon, and tribes.
Apply - Our existing understanding of water, biology, and history to the story of dam removal on the Klamath River.
Demonstrate - An understanding of human impact on the environment and Native American tribes.
Compare - Pros and cons of dams.
Lesson Overview
In this lesson, students will explore the purpose, function, and impact of dams, with a special focus on how they affect river ecosystems, salmon populations, and Native American communities in California. This lesson supports California State Standards MS-LS2-1: Interdependent Relationships in Ecosystems by examining how changes in water flow, temperature, and habitat caused by dams affect the balance of life in aquatic environments. It also connects to MS-ESS3-3: Human Impacts on Earth Systems by highlighting how human structures like dams can significantly alter natural systems—and how people can work to restore them. As well as looking at cause and effects through the lens of dams and river health.
Students will begin by sharing prior knowledge and building key vocabulary related to ecosystems and dam removal. They will watch a short video featuring Indigenous leaders advocating for the health of the Klamath River and learn about the environmental and cultural significance of dam removal. The lesson emphasizes how dams disrupt the natural relationships between species—such as salmon and their spawning grounds—by blocking migration, increasing parasites, and reducing oxygen levels.
Through the case study of the Klamath River, students will gain a timeline of environmental activism, tribal leadership, and collaboration among governments, nonprofits, and local communities that led to the successful removal of multiple dams. They will also analyze how art and protest have played powerful roles in raising awareness and calling for justice. By the end of the lesson, students will better understand the deep connections between human actions and environmental health, and how restoring ecosystems can involve science, policy, culture, and community efforts.
Teacher Background
The Klamath River—which flows through southern Oregon and northern California—is one of the most ecologically and culturally significant rivers in the western United States. It is home to some of the last remaining runs of wild salmon and steelhead in California and holds deep spiritual and cultural meaning for multiple Native American tribes, including the Yurok, Karuk, Hupa, Klamath, and Shasta peoples.
Historical Context of the Dams
In the early 20th century, a series of hydroelectric and irrigation dams were built along the Klamath River to supply electricity, water for agriculture, and flood control. These dams—Link River (1921), Copco 1 (1918), Copco 2 (1925), Iron Gate (1964), JC Boyle (1958), and Keno (1967)—altered the river's flow, raised water temperatures, and blocked over 400 miles of historic salmon spawning habitat.
As a result, salmon populations declined dramatically. For tribes whose economies, diets, ceremonies, and worldviews are deeply tied to the salmon and the river itself, this was not just an environmental crisis—it was a cultural and spiritual catastrophe.
The Role of Native American Activism
For decades, tribal communities led the fight to remove the dams and restore the river. Native American activism along the Klamath River has taken many forms, including:
Legal battles to assert water rights and fishing rights.
Public protests and rallies highlighting environmental justice.
Youth and intertribal organizing, emphasizing the importance of salmon for future generations.
Scientific contributions, including tribal biologists conducting salmon health studies and habitat restoration planning.
Storytelling and art, such as activist posters and digital media that spread awareness nationally and globally.
In 2002, a major fish kill—caused by poor water management and warm, low-flow conditions—led to the deaths of an estimated 60,000 adult salmon. This galvanized tribal-led advocacy and marked a turning point in the dam removal movement. For many, this was not only a wake-up call but a symbol of broken systems and the urgent need for Indigenous leadership in environmental decision-making.