Twentymile Pumped Storage is a significant energy project located in Hayden, Colorado, with a capacity of 266 megawatts. Operated by Rye Development and owned by US Renewables Group, this facility utilizes advanced pumped storage technology, primarily harnessing water as its fuel source. The project operates within the Public Service Company of Colorado’s power control area and is classified as unregulated under US regulatory standards. While the expected online year for the project is not available, its strategic positioning and capacity contribute to the growing emphasis on renewable energy solutions in the region.