What to know about the Coffin Butte Landfill expansion proposal
Republic Services has asked Benton County for a conditional use permit to expand the 178-acre landfill.
Seven Oregon counties could join together to build and manage solid waste infrastructure and services, under a proposal being considered by a legislative task force.
The aim is to lower costs, provide stability, and ensure that one or two counties don’t bear the financial and environmental costs of taking the entire region’s garbage, Rep. Sarah Finger McDonald, D-Corvallis, told the 12-member Joint Task Force on Municipal Solid Waste in the Willamette Valley.
The Oregon Legislature created the task force last year, to identify solutions for solid waste disposal in the valley, after the region’s garbage disposal options were thrown into flux.
The Reworld incinerator in Brooks, where most of Marion County’s garbage was burned for four decades, closed at the end of 2024.
And residents in nearby Benton County are fighting an expansion of Coffin Butte Landfill, which takes much of Marion County’s and the region’s waste. Even with an expansion, the landfill is expected to close in little more than a decade.
The task force has met six times since mid-December 2025. It must submit a report to interim legislative committees related to the environment by Dec. 15. The task force sunsets on Dec. 31.
Finger McDonald’s proposal, which is the only one yet considered by the task force, would create a voluntary state and local partnership program designed to help counties, cities and regional governments finance and build garbage, recycling, composting and waste-reduction infrastructure.
It would include Marion, Polk, Yamhill, Linn, Benton, Lincoln and Tillamook counties.
“The cities and counties will come together to make a plan. The cities and the counties in this region know what the problem is,” McDonald Finger said. “Whatever is going to be built is going to be expensive.”
The proposal authorizes local governments and regional authorities to direct waste into approved systems when necessary to support infrastructure financing and long-term system stability.
Marion County is currently the only county in the state with a law giving it control over waste disposal, although Oregon Metro manages garbage and recycling for the three-county Portland Metro area.
The proposal would allow the state to help local governments with bonding assistance, matching grants, technical assistance and more. Local governments could choose to build transfer stations, recycling facilities, composting systems, methane capture projects or other infrastructure projects.
“And then those cities and counties would build that infrastructure they need, and would have the option of establishing a fee,” she said.
The proposal also could allow public-private partnerships and collaboration with private waste operators, Finger McDonald said.
The earliest the legislature could pass a bill authorizing the plan would be 2027, Finger McDonald said, meaning it would not go into effect until 2028.
Tracy Loew covers the environment at the Statesman Journal. Send comments, questions and tips: tloew@statesmanjournal.com or 503-399-6779. Follow her on X at @Tracy_Loew