The company's principal activity is the transportation, storage and gathering of natural gas and related services. The company is an indirect wholly owned subsidiary of el paso corporation. The company's two interconnected, large-diameter multiple pipeline systems transport natural gas from natural gas producing fields in Louisiana, Oklahoma, Texas, and the gulf of Mexico to markets in the midwestern and northeastern regions of the United States, including the metropolitan areas of Chicago, detroit and milwaukee. The system consists of 10,600 miles of pipeline with a design capacity of approximately 6,414 mmcf/d.