Investor Presentaiton

Appendix 32 ▼ NWE Capacity as compared to Regional Peers Percent of Peak +Reserve Margin 140% 120% 32% 100% 80% 1% 10% 9% 6% 24% 46% %2 60% 101% 93% 88% 87% 85% 40% 64% 42% 20% 0% Avista Portland General Electric Idaho Power Rocky Mountain Power Pacific Power Puget Sound NorthWestern Energy Energy Utility-Owned NWE's capacity deficit exposes our customers to greater market exposure (price and availability) than any of our regional peers. PPA/Long-Term Contract Market Exposure NorthWestern Energy Delivering a Bright Future

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