Fixed-Income Investor Presentation

39 • DIVERSE RESOURCE PORTFOLIO Gas Supply • 60% supply from Canada • 40% supply from the Rockies KINGSVALE SUMAS Southern Crossing TransCanada KINGSGATEO • Natural gas serves territory through one bi-directional pipeline LNG Peaking Facilities • Portland LNG - 0.6 Bcf • Newport LNG - 1.0 Bcf Mist Gas Storage Facility • Valuable asset - limited storage in the Pacific Northwest 17.5 Bcf facility with 11.7 Bcf serving utility customers and 5.8 Bcf primarily under long-term contracts Utility can recall 5.8 Bcf to support customer demand North Mist Storage Expansion • 4.1 Bcf expansion serves a single customer under long-term contract Mist Gas Storage PORTLAND Portland LNG Newport LNG Malin GTN Williams OSTANFIELD Ruby Paiute Williams NW NaturalⓇ

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