Under the terms of the transaction agreement, TES affiliate, Talen Montana, LLC ("TM"), which currently owns a 30% share (approximately 222 megawatts) of Colstrip Unit 3 and serves as the plant operator, will assume PSE's 25% ownership share in Units 3 and 4 (approximately 370 megawatts) on December 31, 2025. PSE will retain its share of environmental remediation and other asset retirement obligations, decommissioning costs and other appropriate costs associated with Units 3 and 4 that accrue through December 31, 2025.