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May 18, 2016

Old quarry keeps airport cool, saves $430K a year

  • Nashville airport officials say the $10 million geothermal system — the largest of its kind in North America — should last 100 years.
    • By TRAVIS LOLLER
    Associated Press

    NASHVILLE, Tenn. — An abandoned rock quarry near a runway at Nashville International Airport was thought to be such a liability that authorities considered filling it in a decade ago. Now, the water-filled pit is enabling the airport to save $430,000 a year.

    By taking advantage of the quarry reservoir's year-round 50-degree temperature, the airport will be able to halve its cooling costs, said Christine Vitt, the airport authority's vice president of strategic planning and sustainability.


     
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