Questar Corporation is an integrated natural gas holding company with three lines of business operated through wholly owned subsidiaries: Wexpro Company, Questar Pipeline and Questar Gas. Questar Gas distributes natural gas as a public utility in Utah, southwestern Wyoming and a small portion of southeastern Idaho. Questar Gas has the necessary regulatory approvals to serve the areas and has long-term franchises granted by communities and counties within its service area. Questar Gas currently does not face direct competition from other distributors of natural gas for residential and commercial customers in its service territory. Wexpro develops, produces and delivers natural gas from cost-of-service reserves for gas utility affiliate Questar Gas under the terms of the Wexpro Agreement and the Wexpro II Agreement (Wexpro agreements), comprehensive agreements with the states of Utah and Wyoming. Wexpro delivers natural gas production to Questar Gas at cost of service. Wexpro's properties are located in the Rocky Mountain region, in the Vermillion, Pinedale, Moxa Arch, and Uinta Basin producing fields. Wexpro faces competition in its business, including the marketing of oil and NGL, and obtaining goods, services and labor. Questar Pipeline provides natural gas transportation and underground-storage services in Utah, Wyoming and Colorado. Questar Pipeline and its subsidiaries operate 2,667 miles of interstate pipeline, including 10 miles owned by a third party. Questar Pipeline's core transportation system is strategically located near large reserves of natural gas in six Rocky Mountain producing areas. Questar Pipeline transports natural gas from these producing areas to other pipeline systems, Questar Gas's distribution system and other utility systems. In addition to this core system, Questar Pipeline, through wholly-owned subsidiaries, owns and operates the Overthrust Pipeline in southwestern Wyoming and the eastern segment of Southern Trails Pipeline, a 487-mile line that extends from the Blanco hub in New Mexico's San Juan Basin to just inside the California state line near the Arizona border. An additional 96miles of Southern Trails Pipeline in California is not in service.