ONEOK Partners LP’s Midwestern Gas Transmission Pipeline is a relatively small natural gas pipeline at 366 miles, but its connections to larger systems and ability to move gas bilaterally from Chicago and the Ohio River Valley makes it a major piece of the Midwestern gas market.

The system has a total capacity of 650 million cubic feet per day and seven compressor stations. The pipeline is connected to Alliance Pipeline, Northern Border Pipeline, Tennessee Gas Pipeline, Trunkline and Texas Gas Transmission. It provides service to markets in Kentucky, Indiana, southern ...