Absolute fuel-specific wind-generation increased by 27.6%, according to the U.S. Department of Energy's Energy Information Administration. Washington, Wyoming and Colorado showed the largest increases. The higher total in Wyoming is primarily attributable to the generation from the Top of the World and Dunlap projects, which came online in October 2010.
Conventional hydroelectric generation increased by 16.2%, with the largest rises in Washington, California and Oregon.
Meanwhile, coal-fired generators showed the largest fuel-specific decline from January 2010 to January 2011, as their generation was down 1.3%. The drops in West Virginia and Florida accounted for 76.3% of the national decline in coal-fired generation.
In January, coal-fired plants contributed 47.1% of the power generated in the U.S. Natural gas-fired plants contributed 20.4%, and nuclear plants contributed 20%.
Conventional hydroelectric sources provided 7.1% of the total, while other renewables (wind, biomass, geothermal and solar) generated the remaining 4.5% of electric power.