Portland Harbor Superfund Cleanup

The Superfund: Decades of Industrial Pollution

The Portland Harbor Superfund site stretches for more than ten miles along the Willamette River and is one of the most complex and costly environmental cleanups in Oregon history. Decades of industrial activity left behind polluted river sediments, harming water quality, fish and wildlife, and the health of nearby communities.

Portland Harbor was designated a federal Superfund site in 2000. While years of investigation and planning have followed, the most disruptive and expensive phase of cleanup is now approaching. Decisions made in the next few years will determine how the cleanup is carried out, how much it costs, and who ultimately bears the burden.

The Cleanup Plan and Why It Matters

The Environmental Protection Agency’s Record of Decision calls for a combination of dredging and capping polluted sediments. Under the current approach, a significant portion of dredged material would be transported out of the region for disposal.

According to EPA materials, cleanup could involve roughly 3 million cubic yards of sediment, or about 5 million tons by weight translating to 200,000 truckloads of sentiment that would be trucked out of Portland. Transportation and disposal are the single largest drivers of cleanup costs, and the details of how material is moved and where it goes are still being refined.

These unresolved decisions have major implications for Portland residents, surrounding communities, and ratepayers across the region.

Cleaning Up Smart, Cleaning Up Right

The Portland Harbor cleanup must not shift environmental, health, or financial burdens from polluters onto Portland residents or other Oregon communities. Polluters must bear the costs, and cleanup decisions must protect people, public health, and the environment.

Transparency, accountability, and community protection must guide every step of this process.

A Cost Effective Clean Up

Portland families should not be forced to shoulder the financial and health burdens of cleaning up pollution they did not create.
The City of Portland is a Potentially Responsible Party for the Portland Harbor Superfund cleanup, which means residents are already paying toward cleanup costs through a dedicated line item on their utility bills. As the most expensive phase of cleanup approaches, the lack of clear cost transparency puts Portland ratepayers at risk.

Total cleanup costs remain undetermined, but they are already projected to far exceed the original $1.3 billion estimate. Under transportation-heavy cleanup scenarios, total costs could exceed $6 billion dollars with as much as 70 percent driven by moving contaminated sediment out of the region.

This approach also carries serious air quality and public health consequences. EPA materials show that transporting sediment could require approximately 200,000 truckloads over more than a decade, averaging around 120 trucks per day during dredging seasons. That level of diesel truck traffic would generate substantial carbon emissions and diesel particulate pollution linked to asthma, heart disease, and other serious health impacts.

For families already struggling with housing, energy, and utility costs, this creates a dual risk: higher bills and increased exposure to air pollution. Any cleanup plan must include firm protections to ensure polluters pay their fair share and that Portland residents are not left holding the bag.