Alabama utility pumps air into a cave?

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Alabama utility pumps air into a cave?

Postby William Bagwell » Sep 9, 2018 8:11 pm

Reading a blog by the owner of a solar panel company in Florida. (Not going to link it) One sentence in a long post caught my eye.
"One Alabama utility pumps air into a cave and then brings it out through a turbine engine."

No other details then it jumps to what other utilities are trying for energy storage. Seems a bit odd to me... If true hoping someone here knows more?
William Bagwell
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