Company Facts

Idaho Power is an electric utility engaged in the generation, transmission, distribution, sale and purchase of electric energy and is regulated by the Federal Energy Regulatory Commission (FERC) and the state regulatory commissions of Idaho and Oregon. The company is involved in the following business activities:

Generation — we rely on our 17 hydroelectric generating plants on the Snake River and its tributaries, natural gas-fired plants and shares of three jointly-owned coal-fired plants.
Transmission — to get electricity generated at Hells Canyon, for example, to homes and businesses, it’s first transmitted over long distances on transmission lines to substations.
Distribution – distribution lines are smaller than transmission lines and are used to bring electricity from substations to homes and businesses.
Sales — of electricity to retail (residential, business and irrigation) and wholesale (other utilities, energy marketing companies and incorporated municipalities) customers.
Purchases — we purchase from the wholesale market when additional energy is needed to serve customer loads or when purchasing from the market is less costly than running our generating plants.

With 17 low-cost hydroelectric projects as the core of our generation portfolio, our residential, business and agricultural customers pay some of the nation’s lowest prices for electricity.

Service Area

As of Dec. 31, 2018

Our unique service area spans some of the most rugged and remote landscape across southern Idaho and eastern Oregon.

Population of Service Area: 1,200,000 (estimate)

Square Miles of Service Area: 24,000 (estimate) in southern Idaho and eastern Oregon

Percent of operating revenues by jurisdiction:
Idaho 95 percent
Oregon 5 percent


Total: 557,645

Residential Customers added in 2017: 11,065

Commercial and Industrial Customers added in 2017: 1,270

Irrigation Customers added in 2017: 243

Learn more about our customers.

Transmission and Distribution:

Number of Step-Up Transmission Substations (1): 24

Number of Energized Distribution Substations (Excluding Mobile Substations and Dispatch Centers) (2): 223

Number of Transmission Substations (3): 24

Number of Switching Stations (4): 9

Transmission Line Pole Miles: 4,816

Distribution Line Pole Miles (Underground & Overhead): 27,569

(1) Increases voltage from power plants to higher voltage transmission line levels for long distance transmission of power.
(2) Reduces voltage from higher voltage transmission line levels to lower voltage for safe distribution to customers.
(3) Stations connecting two or more transmission lines with at least one transformer converting one transmission voltage level to another transmission voltage level (i.e., 230 kV to 138 kV).
(4) Stations connecting two or more transmission lines of the same voltage (no voltage transformation).


Number of Full-Time Employees: 1,964
Learn more about our employees.

Sales and Load Facts (2018)

Total Annual Sales: 17,450,159 Megawatt-Hours

Peak Summer Load (July 9, 2018): 3,392 Megawatts

Peak Winter Load (Dec. 6, 2018 at 8 a.m.): 2,267 Megawatts

All-time Summer System Peak (July 7, 2017 at 5 p.m.): 3,422 Megawatts

All-time Winter System Peak (Dec. 10, 2009 at 8 a.m.): 2,528 Megawatts

Nameplate Generation: 3,660

Idaho Power is regulated by:

The Federal Energy Regulatory Commission
The Idaho Public Utilities Commission
The Oregon Public Utility Commission

Idaho Power is the chief operating subsidiary of holding company IDACORP Inc., traded on the New York Stock Exchange under the ticker symbol IDA.