Installed electrical capacity (utility and nonutility) was 3.02 million kW in 1999; total production (entirely hydroelectric) was 14.4 billion kWh. About half of Idaho's irrigation depends on electric pumping, and electrical energy consumption regularly exceeds the state's supply. Large dams used to generate electricity include the Dworshak on the north fork of the Clearwater, the Anderson Ranch on the south fork of the Boise, and the Brownlee on the Snake at the Oregon border.
Idaho's large size, widespread and relatively rural population, and lack of public transportation foster reliance on motor vehicles and imported petroleum products. Natural gas is also imported. Hot water from thermal springs is used to heat buildings in Boise. In 2000 Idaho's total per capita energy consumption was 395 million Btu (99.5 million kcal), ranking it 15th among the 50 states.