NW Natural files $59.4M Oregon rate case; extends credit facilities to 2027

Northwest Natural Holding Co

NW Natural subsidiary filed Oregon rate case requesting $59.4M annual revenue increase (~5.79% above current rates).
Filing assumes 52% equity, 10.4% ROE, 7.658% cost of capital, average rate base of $2.29B.
$204M rate base increase driven by distribution system upgrades, IT/cybersecurity, and Mist gas storage investments.
OPUC review expected up to 10 months; new rates targeted to take effect November 1, 2025.
NW Holdings $200M and NW Natural $400M credit facilities extended to November 2027 from November 2026.

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