Questar Corp. is a natural gas-focused energy company with three major lines of business: retail gas distribution, interstate gas transportation and gas production. The company operates through its three subsidiaries: Questar Gas, Questar Pipeline and Wexpro. Questar Gas provides retail natural gas-distribution service in Utah, southwestern Wyoming and southeastern Idaho. Questar Pipeline transports and stores natural gas. It owns and operates the Clay Basin storage facility located in the Rocky Mountain region. Wexpro develops and produces natural gas on behalf of Questar Gas. It develops and produces cost-of-service reserves for gas utility affiliate Questar Gas under the terms of the Wexpro Agreement, a long-standing comprehensive agreement with the states of Utah and Wyoming. Questar was founded in 1922 and is headquartered in Salt Lake City, UT.