MountainWest Pipeline is an interstate natural gas pipeline company that provides transportation and underground storage services in Utah, Wyoming and Colorado. Questar Pipeline owns and operates slightly more than 2,500 miles of pipeline with total daily capacity of 2,530 Mdth. Questar Pipeline’s system is strategically located in the Rocky Mountains near large reserves of natural gas in six major producing areas, including the Greater Green River, Uinta and Piceance basins.