Keystone Project
June 1st, 2012

Keystone constructed and started up the 40 MMscfd Sarsen Gas Processing Plant along with a gathering system in Butler County, Pennsylvania, in 2010. These greenfield facilities were permitted, designed, constructed and started up within one year of execution of the definitive agreements. Due to the lack of ethane infrastructure in the region, Stonehenge developed and implemented a unique design modification to a typical cryogenic facility, thereby maximizing the value of the wellhead stream and ensuring compliance with residue gas and NGL specifications. The Keystone plant included propane fractionation to supply propane to the local markets and provide an additional upgrade to the value of the natural gas liquid stream.

Given the strong success of our producing partners, Keystone added 50 MMscfd of processing capacity in 2012 by constructing the Bluestone Gas Processing Plant, field compression and continued expansions of the gas gathering system.

The Keystone venture is an example of Stonehenge’s ability to meet the technical, commercial, schedule and growth challenges associated with maximizing the value of an early‐mover position. This effort provides an experience platform to build on.

Sarsen Gas Processing Plant

Bluestone Gas Processing Plant