Out-of-state developers want to bury and operate a transmission cable under the Columbia River from The Dalles to Portland.
Our goal: ensure federal and state decision-makers protect the salmon, river health, and Tribal treaty rights. We are advocating for full transparency and robust environmental processes to ensure all impacts are clear before decision-makers.
Cascade Renewable Transmission wants to bury a 100-mile, 320-kilovolt electrical transmission cable (think: a massive, high-voltage power line) under the Columbia River from The Dalles to Portland. If approved, this would be the first in-water electrical transmission cable in the Pacific Northwest.
Our Concerns
To date, very little is known about the actual impacts of this project on the health of the Columbia. We are concerned with the short-term and long-term impacts of dredging a giant trench through the river. Issues we are tracking include, but are not limited to:
- Impacts on salmon and other aquatic species
- Concerns about the projected 40- to 50-year lifespan of the project
- Lack of clarity on the project’s decommissioning, maintenance, and repairs, especially in sensitive ecological areas
- Impacts from potential seismic events or vessel strikes
- Water quality concerns, particularly heat pollution from the in-water cable
The Bigger Picture
This project could set a staggering precedent: allowing developers to turn the Columbia River itself into a transmission corridor. This region and river are unlike any in the world and contain a rich, vibrant history. Turning the Columbia into a utility corridor could vastly alter the use of the Columbia River and impact the species and communities that rely upon it.
Prioritizing a Just Transition
We approach all our energy work by advocating for a just transition away from fossil fuels. New energy development should not repeat the mistakes of old energy systems. In the Pacific Northwest, these mistakes include placing disproportionate burdens on salmon and the communities that rely on them.
Our energy system must be upgraded if we are to achieve our climate goals, and many energy experts believe that more and better electrical transmission is key to realizing the promise of wind and solar energy. However, it remains unclear whether, and how much, the Cable Under the Columbia would actually transmit or support clean, renewable energy energy. And assuming that more transmission lines are helpful, we are not convinced that the Columbia River is the best place for them—especially because this massive power line could be sited in the existing transportation or electrical corridors that already exist on both sides of the river.
For all energy projects, Columbia Riverkeeper aims to understand how development will impact Tribal Nations and all people who rely on the Columbia River for salmon, clean water, and beyond. Please see CRITFC’s Energy Vision for the Columbia River Basin for more information about how our energy future can support salmon recovery.