Northern Natural Gas operates an interstate natural gas pipeline that extends from the Permian Basin in Texas to the Upper Midwest. The system is comprised of more than 16,000 miles of natural gas pipeline and five natural gas storage facilities. NNG provides transportation and storage services to approximately 75 utilities and numerous end-use customers in the Upper Midwest. It also provides cross-haul and grid transportation between other interstate and intrastate pipelines in the Permian, Anadarko and Hugoton, Texas, areas and the Midwest. Northern Natural Gas accesses its supply from every major Mid-Continent basin, as well as the Rocky Mountain and Western Canadian basins. Northern Natural Gas is a subsidiary of MidAmerican Energy Holdings Company, a global leader in the production of energy from diversified fuel sources, including geothermal, natural gas, hydroelectric, nuclear and coal. Northern Natural Gas maintains a location in Omaha.