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Benton County NRAC approves letter urging denial of Coffin Butte Landfill expansion CUP
Summary
At a special meeting, the Benton County Natural Resources Advisory Committee voted to finalize a report and send a letter to the planning commission recommending denial of the Conditional Use Permit for the Coffin Butte Landfill expansion, citing methane inspection infractions, an expired Title V air permit, and unresolved groundwater concerns.
At a special meeting of the Benton County Natural Resources Advisory Committee (NRAC), members approved a final report and a letter to the Benton County Planning Commission recommending denial of the Conditional Use Permit (CUP) for the proposed Coffin Butte Landfill expansion.
NRAC said the recommendation rests on several substantive concerns identified in its review: methane emissions and multiple Environmental Protection Agency (EPA) inspection infractions, an expired Title V air permit, unresolved questions about leachate and groundwater contamination (including arsenic and untested per- and polyfluoroalkyl substances, PFAS), and potential environmental justice and local economic impacts. The committee finalized language intended to make the recommendation and its rationale concise for the planning commission.
Committee members discussed the letter line by line and removed or tightened language they judged extraneous. They debated whether the document read like a conditional approval with mitigation measures or a recommendation for denial; the committee elected to make denial the clear recommendation so the planning commission retains final authority. Members also debated references to ongoing state legislative activity, an EPA subpoena, and Oregon Department of Environmental Quality (DEQ) involvement; NRAC retained a concise reference to those ongoing external actions as part of the rationale for denying the CUP.
On air quality, the committee noted that methane-related EPA inspections had produced infractions in at least two instances and recommended calling out the expired Title V air permit explicitly. On water issues, members emphasized that leachate testing has occurred (the City of Corvallis tested leachate and stopped accepting it), but surrounding groundwater wells have not been comprehensively tested for PFAS and other contaminants; NRAC said further comprehensive groundwater and toxicological analysis is needed but framed that analysis as part of the basis for denial of the CUP rather than as a set of conditions for approval.
NRAC also discussed societal and economic impacts on nearby residents and communities, noting that expansion would lift intake caps and could affect property values, schools and community health in nearby neighborhoods. The committee trimmed material on potential solutions (for example, rail reuse or sustainable materials management) as not directly supportive of a denial argument and removed language about further renewals to avoid introducing confusion.
After edits, the committee took a show-of-hands vote to finalize and send the report and letter to the planning commission. The chair (signatory logistics to be finalized) was authorized to sign the letter on behalf of NRAC. A committee member stated that no one recorded opposition during the vote.
NRAC members said the planning commission will make the final decision on the CUP; the letter serves as NRAC's written recommendation and supporting rationale. Committee members also noted some members were absent and agreed not to list absent members' names on the signed letter without prior consent. The committee adjourned after approving the document.
