Current Projects

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Stonehenge Energy Resources II, L.P. was formed in 2012, following the transaction with MarkWest Energy Partners, focusing on natural gas midstream opportunities in the U.S. Appalachia and Rocky Mountain regions. In April of 2015, Stonehenge II announced the formation of Stonehenge Appalachia, LLC. Stonehenge II is a 100% owner and manager/operator of Stonehenge Appalachia.

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Stonehenge Appalachia and Rex Energy Corporation entered into an agreement in May of 2015 for Stonehenge Appalachia to construct a natural gas gathering and compression system (Butler Pipeline System) to transport natural gas production from the Moraine East Area in Butler County, Pennsylvania. Drilling and environmental work have already begun, the Year 0 facilities are targeted for in-service by January 1, 2016. Read Full Release

Stonehenge Appalachia – Butler Pipeline System

Previous Projects

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Stonehenge Energy Resources L.P. was formed in late 2007 to design, build, own and operate midstream assets, such as natural gas gathering, treating and processing. Stonehenge offers considerable engineering, operating and financial resources that can be applied to the midstream needs of natural gas producers. This allows our customers/partners to focus their resources on other important functions, while enjoying less risk and enhanced project economics.

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In 2009, Keystone Midstream Services, LLC was formed. Stonehenge Energy Resources, L.P. was 60% owner and manager/operator of Keystone while Rex Energy Corporation owned 28% and Sumitomo Corporation owned 12%. Rex and Sumitomo produce NGL‐rich gas from the Marcellus Shale formation in Butler County, Pennsylvania, north of Pittsburgh. Keystone was sold to MarkWest Liberty Midstream & Resources, LLC for $512 Million in 2012. Read Full Release

Keystone – Sarsen Gas Processing Plant & Bluestone Processing Plant