The SouthOK gathering system is located in the Ardmore and Anadarko Basins and includes the Golden Trend, SCOOP, and Woodford Shale areas of southern Oklahoma. The gathering system has approximately 1,500 miles of active pipelines.
The SouthOK system includes five separate operational processing plants: Velma, Velma V-60, Coalgate, Stonewall and Tupelo. The SouthOK processing operations currently have a total nameplate capacity of 560 MMcf/d. The 150 MMcf/d Hickory Hills Plant is currently under construction and expected to begin operations in the second half of 2018. The Coalgate, Stonewall, and Hickory Hills facilities are owned by Centrahoma. The SouthOK system has access to natural gas takeaway pipelines owned by affiliates of Enable Midstream Partners, L.P. (“Enable”); MPLX, LP; Kinder Morgan; ONEOK; and Southern Star Central Gas Pipeline, Inc. (“Southern Star”).


The following table lists the South Oklahoma Gas Gathering & 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 gass 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) Plant natural gas inlet and NGL production volumes represent 100% of ownership interests.