History of the oil shale industry in the United States Act of 1985 which among other things abolished the United States' Synthetic Liquid Fuels Program. Union finally bowed to continued low oil prices and closed the project in 1991, rather than complete the US$2 billion project. Over several decades, some of the world's largest oil companies (Amoco, Arco, Chevron, Exxon, Gulf, Phillips, Shell, Sohio, Sunoco, Texaco, Union Oil) had spent billions of dollars to start an oil shale industry in the Green River Formation, the world's largest oil shale resource. But in the end, cheap petroleum prices drove oil shale out of business. Even after the oil shale bust, some
Heltne Oil Company after the war." It has two-toned decorative brickwork, which, "together with ornamental pilasters blend nicely with the more modern and functional aspects of the design. Large windows to display company products and accessories together with more spacious enclosed service bays reflect the changes taking place in the service station industry during the late 1930's." It was deemed "significant for its association with automobile travel along US 2 from the late 1930s through the early post-war era, as well as for its architecture. Heltne Oil Company The Heltne Oil Company is a site on the National Register of Historic Places located