Avista Service Territory

Kettle Falls Sandpoint MONTANA Seattle Noxon QUICK FACTS Spokane Coeur d’Alene QUICK FACTS Missoula Olympia Jackson Prairie Othello Helena Natural Gas Storage Pullman Moscow Goldendale Clarkston Lewiston Stevenson Electric Annual Revenue per Customer Grangeville Portland Retail Electric Revenues ...... $ 759,781,000 (Residential) ...... $ 649.01 La Grande Salem Wholesale Electric Revenues ...... $ 112,071,000 Peak Day Demand (Dth) ...... 285,960

Retail Energy Sales (Thousands of MWhs) ...... 8,497 AVISTA SERVICE TERRITORY Wholesale Energy Sales (Thousands of MWhs) ...... 2,998 Utility Power Supply Mix Boise Roseburg Electric Retail Electric Customers (Avg/Period) ...... 374,384 Total Hydro (Includes Long-Term Contracts) ...... 49% Medford Natural Gas Annual Use per Residential Customer (kWh)...... 10,667 Company-Owned Hydro ...... 41.5% Klamath Falls Electric and Natural Gas Revenue per kWh (Residential) ...... $ 0.0962 Long-Term Hydro Contracts ...... 7.5% Annual Revenue per Customer Natural Gas ...... 35%as of 12/31/2014 (Residential) ...... $ 1,025.74 Coal ...... 9.5% AVISTA HEADQUARTERS INVESTOR INFORMATION 1411 East Mission Avenue 800.222.4931 Biomass ...... 2% Spokane, WA 99202 Natural Gas Wind Contract ...... 4.5% 509.489.0500 EXCHANGE LISTING Ticker Symbol: AVA, Retail Natural Gas Revenues ...... $ 293,780,000 MAILING ADDRESS Stock Exchange Wholesale Natural Gas Revenues ...... $ 153,446,000 100% PO Box 3727 Spokane, WA 99220-3727 WEBSITES Retail Therms Delivered ...... 310,185,000 www.avistacorp.com Transportation Therms Delivered ...... 178,377,000 24/7 MEDIA LINE www.avistautilities.com 509.495.4174 Avista serves electric and natural gas customers Wholesale Therms Delivered ...... 684,317,000 FIND US ON Retail Natural Gas Customers (Avg/Period) ...... 336,043 in eastern Washington and northern Idaho, REPORT AN OUTAGE FACEBOOK & TWITTER 800.227.9187 www.facebook.com/ Annual Use per Residential Customer (Therms) ...... 620 and natural gas customers in southern and View Outage Updates avistautilities Revenue per Therm (Residential) ...... $ 1.05 eastern Oregon. www.avistautilities.com www.twitter.com/ avistautilities PRINTED ON RECYCLED PAPER QUICK FACTS EMBRACING WEA BRIGHTER HAVE ENERGY FUTURE FOR TOGETHER THAT

AVISTA CORP. FINANCIAL DATA AVISTA UTILITIES GENERATION CAPABILITY OF COMPANY- Coyote Springs 2 ...... 295.0 YEAR ENDED 12/31/16 OWNED RESOURCES (MEGAWATTS) Kettle Falls (Biomass) ...... 53.5 Population of Service Area ...... 1,600,000 Kettle Falls CT ...... 6.9 Total Annual Revenue ...... $1,442,483,000 Miles of Transmission Line Hydroelectric Northeast CT ...... 64.8 Net Income ...... $ 137,228,000 230kV ...... 685 Cabinet Gorge (Clark Fork) ...... 273.0 Rathdrum CT ...... 166.5 Earnings Common Share Diluted ...... $ 2.15 115kV ...... 1,565 Little Falls ...... 35.6 Total Thermal Capability ...... 833.3 Dividends Paid per Common Share ...... $ 1.37 500kV ...... 500 Long Lake ...... 88.0 Total Generation Capability ...... 1,861.9 Book Value per Common Share ...... $ 25.69 Miles of Distribution Lines ...... 19,000 Monroe Street ...... 15.0 Stock Price as of 12/31/16 ...... $ 39.99 Miles of Natural Gas Distribution Mains ...... 7,700 Nine Mile ...... 29.0 Electric Load 2016 Range Percent of Utility Operating Revenues by Noxon Rapids (Clark Fork) ...... 562.4 Electric Average Hourly Load (aMW) ...... 1,033 High...... $ 44.97 Jurisdiction—Retail Revenue Post Falls ...... 15.4 Peak Electric Native Load Required for 2016 Low ...... $ 34.67 (Actual Sales to Customers) Upper Falls ...... 10.2 Retail—Winter ...... 1,655 Return on Average Common Equity Washington ...... 62.88% Total Hydroelectric Capability ...... 1,028.6 Retail—Summer ...... 1,587 (Total Company) ...... 8.60% Idaho ...... 28.90% Employees (Avista Utilities Employees Only) ...... 1,742 Oregon ...... 8.22% Thermal Generation Forecasted Electric Energy Employee Community Volunteer Hours ...... 47,800 Boulder Park ...... 24.6 Requirements (aMW) Colstrip Units 3 and 4 ...... 222.0 System Load—2017 ...... 1,078