About Us

Guardian Pipeline, L.L.C. is owned by ONEOK Inc.

Guardian Pipeline originates from the Chicago Hub, near Joliet, Illinois, and extends to Green Bay, Wisconsin. The pipeline has approximately 263 miles of 36, 30, & 20 inch mainline, 100,225 HP of compression and 18 meter stations. The current design capacity of Guardian Pipeline, L.L.C. is 1,287,000 Dth/day. Guardian accesses all major North American supply basins, multiple upstream firm transportation providers and multiple providers of storage and related services. We offer competitive short-term and long-term firm transportation rates and firm transportation service with significant flexibility and accelerated flow allowances at no additional cost. Interruptible transportation and park and loan services are also available.

ONEOK, Inc. (pronounced ONE-OAK) (NYSE: OKE) is a leading midstream service provider and owner of one of the nation's premier natural gas liquids (NGL) systems, connecting NGL supply in the Rocky Mountain, Mid-Continent and Permian regions with key market centers and an extensive network of natural gas gathering, processing, storage and transportation assets.

ONEOK is a FORTUNE 500 company and is included in the S&P 500.