100 miles south of Salt Lake City, a giant mound of salt reaches thousands of feet down into the Earth. It could play a major role in L.A.’s energy future.
A new, old type of energy storage
A gate blocks access to land controlled by Magnum Development across the street from the coal-fired Intermountain Power Plant outside Delta, Utah. Magnum has already built several hollow caverns in the salt dome to store butane and propane.. It’s a partnership between North Carolina-based electricity giant Duke Energy, Sammons Enterprises of Dallas and American Transmission Co., whose headquarters is in Wisconsin.
Siemens’ Bailie, who has worked for both Magnum and Range, estimated a compressed air project in Utah would use about half the natural gas as a modern gas-fired power plant with the same capacity.
The key is the 488-mile power line running from Utah to Southern California, known as the Southern Transmission System.
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