Our Natural Gas Liquids segment owns and operates facilities that gather, fractionate, treat and distribute NGLs and store NGL products, primarily in Oklahoma, Kansas, Texas, New Mexico and the Rocky Mountain region, which includes the Williston, Powder River and DJ Basins. We provide midstream services to producers of NGLs and deliver those products to the two primary market centers: one in the Mid-Continent in Conway, Kansas, and the other in the Gulf Coast in Mont Belvieu, Texas.

We own or have an ownership interest in FERC-regulated NGL gathering and distribution pipelines in Oklahoma, Kansas, Texas, New Mexico, Montana, North Dakota, Wyoming and Colorado, and terminal and storage facilities in Missouri, Nebraska, Iowa and Illinois.  The majority of the pipeline-connected natural gas processing plants in the Williston Basin, Oklahoma, Kansas and the Texas Panhandle are connected to our NGL gathering systems.  We own and operate truck- and rail-loading and -unloading facilities connected to our NGL fractionation and pipeline assets.  We also own FERC-regulated NGL distribution pipelines in Kansas, Missouri, Nebraska, Iowa, Illinois and Indiana that connect our Mid-Continent assets with Midwest markets, including Chicago, Illinois.  A portion of our ONEOK North System transports refined petroleum products, including unleaded gasoline and diesel, from Kansas to Iowa.

Most natural gas produced at the wellhead contains a mixture of NGL components, such as ethane, propane, iso-butane, normal butane and natural gasoline. The NGLs that are separated from the natural gas stream at natural gas processing plants remain in a mixed, unfractionated form until they are gathered, primarily by pipeline, and delivered to fractionators where the NGLs are separated into NGL products. These NGL products are then stored or distributed to our customers, such as petrochemical manufacturers, heating fuel users, ethanol producers, refineries, exporters and propane distributors.

The Natural Gas Liquids segment owns 9,130 miles of gathering pipelines, 4,350 miles of distribution pipelines, eight NGL fractionators with combined operating capacity of 920,000 barrels per day of net capacity, and 6 storage facilities with approximately 30 million barrels of capacity.

ONEOK Hydrocarbon Products and Services

ONEOK Hydrocarbon, L.P., its affiliates, and the companies in which they have invested, process and transport a significant portion of total U.S. NGL production and market NGLs.

Natural Gas Liquids -- We employ an extensive system of pipelines, fractionators and underground storage facilities to gather, process and distribute natural NGLs.

Liquefied Petroleum Gas Marketing -- Our NGL marketing group purchases, stores and supplies NGLs through terminals located in the central U.S. We offer a variety of services to help manage risk, such as fixed-price forward sales contracts and secure-product supply.

NGL Marketing -- The trading group supports the marketing of product around the physical assets of ONEOK Hydrocarbon, L.P. and the companies in which it invests. The group also manages a marketing operation. ONEOK Hydrocarbon, L.P. trades in the physical markets.