About Us

Guardian Pipeline, L.L.C. is owned by ONEOK Partners, L.P. and operated by ONEOK Partners GP, L.L.C.

Guardian Pipeline originates from the Chicago Hub, near Joliet, Illinois, and extends to Green Bay, Wisconsin. The pipeline has approximately 252 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 Partners, L.P. (NYSE: OKS) is one of the largest publicly traded master limited partnerships, and is a leader in the gathering, processing, storage and transportation of natural gas in the U.S. and owns one of the nation’s premier natural gas liquids (NGL) systems, connecting NGL supply in the Mid-Continent and Rockie Mountain regions with key market centers.

Our sole general partner is a subsidiary of ONEOK Inc., an energy company founded in 1906 that's involved in natural gas distribution and energy services, and owns 42.8 percent of the partnership. ONEOK is one of the largest natural gas distributors in the country, and its energy services operation focuses primarily on marketing natural gas and related services throughout the U.S.