SPOKANE, Wash., March 24, 2026 (GLOBE NEWSWIRE) -- Avista Utilities, an operating division of Avista Corp. (NYSE: AVA), announced today that the Washington Utilities and Transportation Commission has formally approved Avista’s 2025 Clean Energy Implementation Plan (CEIP). The plan builds on Avista’s long-standing clean energy foundation while outlining the path forward to meet Washington’s non-carbon emitting energy requirements. “We built a plan designed to meet the demands of a rapidly evolving energy sy ...