Client: Sierra Club
Authors: Liz Stanton, PhD and Joshua R. Castigliego
June 2026
AEC assisted Sierra Club with its submission of Comments on the Missouri Public Service Commission’s draft Integrated Resource Planning (IRP) Rule in File No. EW-2026-0091. Sierra Club’s comments propose revisions to strengthen the IRP process by increasing transparency, clarifying regulatory requirements, enhancing stakeholder participation and access to information, and promoting more robust, data-driven utility planning.