Quick Facts

Service area details
Population of Service Area                                       1,600,000
Miles of Transmission Line
230kV 685
115kV 1,565
500kV 500
Miles of Distribution Lines 19,000
Miles of Natural Gas Distribution Mains 7,700
Percent of Utility Operating Revenues by Jurisdiction—Retail Revenue (Actual Sales to Customers)
Washington                                                        62.88%
Idaho 28.90%
Oregon 8.22%
Our Power Supply Mix
Total Hydro (Includes Long-Term Contracts) 49%
    › Company-Owned Hydro 41.5%  
    › Long-Term Hydro Contracts 7.5%  
Natural Gas 35%
Coal 9.5%
Biomass 2%
Wind Contract 4.5%


Generation Capability of Company-Owned Resources (Megawatts)

Cabinet Gorge (Clark Fork)                      273.0
Little Falls 35.6
Long Lake 88.0
Monroe Street 15.0
Nine Mile 29.0
Noxon Rapids (Clark Fork) 562.4
Post Falls 15.4
Upper Falls 10.2
Total Hydroelectric Capability 1,028.6

Thermal Generation
Boulder park                                                      24.6
Colstrip Units 3 and 4
Coyote Springs 2 295.0
Kettle Falls (Biomass) 53.5
Kettle Falls CT 6.9
Northeast CT 64.8
Rathdrum CT 166.5
Total Thermal Capability 833.3
Total Generation Capability 1,861.9

Electric Load
Electric Average Hourly Load (aMW) 1,033
Peak Electric Native Load Required for 2016
Retail—Winter 1,655
Retail—Summer 1,587

Forecasted Electric Energy Requirements (aMW)
System Load—2017 1,078

For more quick facts, including financial information for both electricity and gas, download the brochure.

We provide electricity to nearly 340,000 customers and natural gas to about 300,000 customers across 30,000 square miles and four northwestern states.

Avista Service Territories

Our diverse generation system allows us to produce energy that consistently ranks among the nation’s most competitively priced. It includes:

  • Eight hydroelectric generating plants on two rivers.
  • Coal, natural gas and wood-waste combustion plants in five eastern Washington, northern Idaho, and eastern Montana locations.
  • Pipeline access to domestic natural gas, as well as Canadian supplies, that allows us to capture market opportunities and increase cost efficiencies for our growing number of natural gas customers.