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The U.S. Department of Energy has awarded nearly $400 million to fund hundreds of projects across the country that advance affordable, domestic transportation fuels and technologies.


Project Initiative/Award Awardee Status Date
Mammoth Cave National Park National Parks Initiative In progress Sep 2015

States impacted:

  • Kentucky

Mammoth Cave National Park

Mammoth Cave National Park started using E85 in 1999 and today runs all its vehicles on alternative fuels. Thanks to new funding, the park is adding four propane-powered school buses, two propane-powered pickup trucks, and one electric utility vehicle to its fleet. In addition, park personnel are partnering with the Kentucky Clean Cities Partnership to enhance efforts to educate visitors, employees, and the media about the benefits of using alternative fuels.

Learn more about the National Parks Initiative.


  • Kentucky Clean Cities Partnership