ABC News reports that “an alliance of four companies proposed an $8 billion project Tuesday that within a decade could send wind power generated on the plains of Wyoming to households in Southern California.”  

“If approved and financed, the sprawling venture would produce clean power equivalent to the output of a large nuclear power plant by creating one of the country’s largest wind farms near Cheyenne, a huge energy storage site inside Utah caverns and a 525-mile electric transmission line connecting them.”  

“‘This would certainly be one of the most ambitious and expensive energy infrastructure projects we have seen,’ said Travis Miller, an industry analyst for investment research giant Morningstar Inc. ‘Energy storage, paired with renewable energy, has been the holy grail of utilities and energy companies.'”