A rare geologic feature underneath the plant will allow them to store the gas in copious amounts, making it the perfect place for that transformation to bear fruit.

For four decades, the Intermountain Power Project (IPP) has kept the lights on for hundreds of thousands of Americans in six states. But with an eye on an energy transition to reduce carbon emissions, its contracts for supplying electricity will very soon come to an end.

In 2015, the Intermountain Power Agency (IPA), a union of 23 municipalities that together own both the plant and its grid connection assets, began examining whether or not it would be feasible to replace the coal burners with Mitsubishi gas turbines which could run on a blend of natural gas and hydrogen gas.