ONEOK North System, L.L.C. operates FERC-regulated NGL pipelines that span 1,585 miles and has a capacity to transport up to 134,000 barrels per day, with additional capacity under lease. The pipeline transports NGL purity products and various refined products, including unleaded gasoline and diesel fuel throughout the Midwest markets, particularly near Chicago, Illinois. This system includes approximately 978,000 barrels of storage capacity, both cavern and above-ground tanks, and eight NGL terminals. The system also incorporates a 50 percent ownership of the Heartland Pipeline Company, which consists of three refined products terminals and connecting pipelines.