In 1999, Montana generated 31.5 billion kWh of electricity (utility and nonutility), 44% from hydropower and 54% by coal burning; total installed capacity was 5.8 million kW.
In 2002, the state produced 46,000 barrels per day crude oil; proved reserves totaled 260 million barrels in 2001 (10th-largest among the states). Natural gas production in 2002 totaled 84.3 billion cu ft (2.39 billion cu m), with proved reserves in 2001 amounting to 898 billion cu ft (25.4 billion cu m). As of 2001, recoverable coal reserves were estimated at 1.2 billion tons. Production of coal in 2000 totaled 38.3 million tons. In 2000 Montana's total per capita energy consumption was 659 million Btu (166 million kcal), ranking it 4th among the 50 states.