2023 Tri-State Investor Presentation

LONG-TERM WHOLESALE POWER CONTRACTS CREATE A STABLE AND PREDICTABLE REVENUE STREAM RESILIENCE Wholesale power contracts • 42 member contracts extend to 2050 Contract obligations • Contracts obligate Tri-State members to pay all of Tri-State's costs and expenses, including debt service, associated with owning and operating its power supply business Contract flexibility • Each member system has the option to provide up to 5% of its energy requirements from generation it owns or controls In addition, Tri-State has allocated 300 MW for members to self-supply up to 50% of their load. This allocation was granted to six members who participated in the application process 2023 TRI-STATE INVESTOR PRESENTATION | 14

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