Waste Management of Seattle, Inc. v. the Utilities and Transportation Commission

Summary

The court held that the disposal-fee statute unambiguously requires the Commission to include qualifying disposal charges in a solid waste company's permanent rates, subject only to determining whether the charges fall within the statute. The Commission could substantively review the charges under the affiliated-interest statute only if they arose from a direct contract or arrangement between the regulated company and its affiliate, which was absent here. The court also held that appellate review of agency adjudications proceeds on the agency record rather than the superior court's findings and conclusions.