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Benton County planning commission continues Coffin Butte landfill expansion hearing; staff recommends approval with conditions

5340743 · July 9, 2025

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Summary

The Benton County Planning Commission continued public hearings on Republic Services' Coffin Butte expansion (LU‑24‑027). Planning staff reported a revised supplemental staff report recommending approval with more than 80 conditions; commissioners set a decision timeline and pressed staff and the applicant on monitoring and enforcement details.

The Benton County Planning Commission continued its quasi‑judicial public hearing on the Coffin Butte landfill expansion (LU‑24‑027), heard an expanded staff analysis and heard an applicant presentation, and set a decision date. Planning consultant Jesse Winterbrook told the commission the supplemental staff report—expanded to include nearly 2,000 public comments, agency letters and 32 new applicant exhibits—now recommends approval of the conditional use permit with conditions.

The recommendation matters because the commission must complete the evidentiary record before formal deliberations. Chair Fowler reminded attendees the commission must finish the record by the next hearing so it can meet deadlines for deliberation and a final decision tentatively scheduled for July 22. The supplemental staff report was prepared to incorporate public testimony and agency input received after the April 22 staff recommendation, bringing more detail on noise, odor, water quality, wildlife and other issues.

Planning staff told the commission they relied on third‑party reviewers (Winterbrook Planning, Moll Foster and associates, and others) to evaluate technical studies submitted by Republic Services and to propose conditions intended to mitigate impacts. Staff said the supplemental report identifies more than 80 proposed conditions tied to specific approval criteria in the Benton County development code, and adds findings on Goal 5 natural resource issues related to nearby heron rookeries.

Commissioners used the staff presentation to ask clarifying questions on enforcement, monitoring and the county's capacity to follow up if conditions are violated. Several commissioners raised concerns about the county's limited staffing for compliance work and the role of state agencies—most notably the Oregon Department of Environmental Quality (DEQ) and the U.S. Environmental Protection Agency (EPA)—in overseeing air and water quality matters. Planning staff said state and federal agencies have primary jurisdiction for many technical air and water matters and that conditions could require state approvals and monitoring reports to be submitted to the county.

The applicant, Republic Services, told the commission it generally agrees with the staff report and the conditions but proposed a small number of clarifications to three operational conditions. Both staff and the applicant emphasized that approval of the land use permit would not relieve the project of subsequent, separate state permitting (for example DEQ permitting) required before construction or changes in operation.

The hearing was recessed at the end of the night and continued the next day with applicant technical presentations and public testimony scheduled. No final action was taken at the session summarized here.

Provenance: Planning consultant Jesse Winterbrook presented the supplemental staff report and stated the staff recommendation for approval with conditions; the commission then discussed procedure, deadlines and the role of state agencies.