The WestOK gathering system is located in north central Oklahoma and southern Kansas’ Anadarko Basin and includes the Woodford shale and the STACK. The gathering system expands into 13 counties with approximately 6,500 miles of natural gas gathering pipelines.
The WestOK system processes natural gas through three separate cryogenic natural gas processing plants located at the Waynoka I and II and Chester facilities, and one refrigeration plant at the Chaney Dell facility, with total nameplate capacity of 458 MMcf/d. The WestOK system has access to natural gas takeaway pipelines owned by affiliates of Enable; Energy Transfer; and Southern Star.


The following table lists the West Oklahoma system processing plants and related volumes for the year ended December 31, 2017


(1) Gross processing capacity represents 100% of ownership interests and may differ from nameplate processing capacity due to multiple factors including items such as compression limitations, and quality and composition of the gas being processed.
(2) Certain processing facilities in these business units are capable of processing more than their name-plate capacity and when capacity is exceeded the facilities will off-load volumes to other processors, as needed.  The gross plant natural gas inlet throughput volume includes these off-load volumes.
(3) Plant natural gas inlet represents the volume of natural gas passing through the meter located at the inlet of the natural gas processing plant, except for Badlands which represents the total wellhead gathered volume.
(4) Per day Gross Plant Natural Gas Inlet and NGL Production statistics are based on the number of days operational during 2017. 

(5) The Chaney Dell plant was idled in December 2015 due to lower volumes in the WestOK system.