April 11, 2023--Researched by Industrial Info Resources (Sugar Land, Texas)--Following a lawsuit by two environmental advocacy groups, a Montana judge has vacated a state air quality permit for the natural gas-fired, 175-megawatt (MW) $275 million Yellowstone County Generating Station in Laurel, Montana being built by NorthWestern Energy (Sioux Falls, South Dakota), forcing the company to halt construction.