Benton County planning commission hears hours of testimony on Coffin Butte landfill expansion; hearing continued to May 8

The Benton County Planning Commission heard more than three hours of public testimony on May 6 over Republic Services’ application (LU-24-027) for a conditional-use permit to expand the Coffin Butte Landfill. Speakers for and against the proposal described competing risks: proponents said expansion would avoid shifting waste long distances and preserve county revenue; opponents cited odors, methane “super-emitter” findings by the EPA, PFAS in leachate and landfill gas, water-well and arsenic concerns, traffic and wildfire risks and long-term visual impacts on the area.

The commission opened the hearing by announcing the case, LU-24-027, and explaining the proceeding is quasi-judicial and governed by Benton County development code sections 51.705–51.725. Chair Fowler and staff said testimony should address the code criteria and noted the staff report had been available a week earlier. After the applicant’s initial presentation (not part of the public testimony phase on May 6), the commission took statements from more than 70 people who had signed up to speak; roughly two-thirds of those on the roster opposed the expansion.

Why it matters: The project would change the footprint and operations at a landfill that serves the region. Opponents argued the county’s land-use standards — including the conditional-use criteria in Chapter 53 — require denial because expansion would “seriously interfere” with adjacent uses and the character of the area; proponents argued that closing the facility would increase long-haul truck traffic, raise disposal costs and shift environmental impacts elsewhere.

Most prominent points raised

- Odor and air emissions: Residents, local scientists and nonprofit advocates said odor episodes are…