Investor Presentaiton

Powering Arizona 3,377MW Peak Electricity Demand 13 PJ Natural Gas Sales Volume 685MW Renewable Energy FORTISIN Kingman N Navajo Four Corners Flagstaff Cottonwood Prescott Black Mountain Show Low Springerville Lake Havasu City Arizona Gila River San Juan SERVICE AREAS / CUSTOMERS Tucson Electric Power Service Area UNS Gas Service Area UNS Electric Service Area UNS Gas & Electric Service Area Transmission Line Coal-Fired Power Plant Natural Gas-Fired Power Plant Community-Scale Solar Power Company Offices Community-Scale Wind Power Tucson Sundt Luna Nogales Valencia 16

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