Coal power did account for about half of electricity production in the United States about 10 years ago. The utilities did buy more than 90 percent of the coal mined in the United States.
In 2006, there were 1493 coal-powered generating units at electrical utilities across the US, with total nominal capacity of 335.8 GW (compared to 1024 units at nominal capacity of 278 GW in 2000). Actual power generated from coal in 2006 was 227.1 GW (1.991 trillion kilowatt-hours per year), the highest in the world and still slightly ahead of China (1.95 trillion kilowatt-hours per year) at that time. Back in 2000, US production of electricity from coal was 224.3 GW (1.966 trillion kilowatt-hours per year). In 2006, the U.S. consumed 1,026,636,000 short tons (931,349,000 metric tons) or 92.3% of coal mined for electricity generation.