Charles E. Wilkinson

Charles E. Wilkinson 720-889-9933
Principal, Stonehenge Energy Resources II, L.P.

Charles E. Wilkinson joined Stonehenge Energy Resources, L.P. at its inception in 2008 and served as its President until 2015. Stonehenge developed and built Keystone Midstream Services, LLC which gathered and processed NGL-rich gas in Pennsylvania. Keystone was sold in 2012 for $512 million. Subsequently, Stonehenge Energy Resources II, L.P. was formed to develop new midstream projects in the Appalachian and Rocky Mountain regions. His current responsibilities include sourcing potential investments and developing new midstream projects.

Mr. Wilkinson has more than 35 years of experience in the energy industry, primarily in the natural gas midstream sector. Prior to Stonehenge, he was with Enron Corporation for 23 years, and MidAmerican Energy Holdings Company for 5 years, in engineering, business development and asset management positions, involving a broad range of facilities including gas gathering, compression, dehydration, processing, treating; NGL transportation, fractionation and storage; interstate natural gas transportation and storage; and CO2 transportation.

Mr. Wilkinson began his career in 1975 with Black & Veatch Consulting Engineers, primarily designing civil and structural facilities for gas turbine and nuclear power plants and electrical transmission lines. He received his B.S. in Civil Engineering from the University of Nebraska and his M.B.A. from Houston Baptist University.

Patrick A. Redalen

Patrick A. Redalen 720-889-9953
President, Stonehenge Energy Resources II, L.P.

Patrick A. Redalen joined Stonehenge Energy Resources, L.P. in 2010, and helped execute the successful Keystone Project. He now serves as President of Stonehenge Energy Resources II, L.P. In 2015 and 2017 respectively, Stonehenge Appalachia, LLC and Stonehenge Laurel Gathering, LLC were formed to gather and compress natural gas in western Pennsylvania.

Mr. Redalen has more than 25 years of experience in the petroleum industry. Prior to Stonehenge, he started and ran a consulting firm, Energy Business Solutions, LLC, for three years. He served five years, the last two as President, at Pearl Development Company, LLC, a midstream engineering firm, and 14 years at Conoco. His responsibilities spanned commercial, strategic planning and engineering aspects across the petroleum spectrum from wellhead to retail.

Mr. Redalen received his B.S. in Chemical Engineering from the University of Arkansas. He completed Conoco’s Management Development Program.

Philip C. Rutledge

Philip C. Rutledge            720-889-4062
Director of Operations, Stonehenge Energy Resources II, L.P.

Philip C. Rutledge joined Stonehenge Energy Resources II, L.P. in 2017.  He is responsible for the field operations of Stonehenge’s operating companies.

Mr. Rutledge has 37 years of experience in oil and gas operations, primarily in gas plant and field operations, supervision, management and measurement of hydrocarbons.  Prior to Stonehenge, he served in a variety of leadership roles at Anadarko Petroleum and Western Gas Resources.

After serving 4 years in the U.S, Air Force as a surgical technician, Mr. Rutledge earned certification in welding and metallurgy.  He graduated summa cum laude with a Bachelor’s Degree in Business Communication from Jones International University.

Rex Energy and Stonehenge Energy Resources Announce Moraine East Gathering Agreement

STATE COLLEGE, Pa, May 19, 2015 (GLOBE NEWSWIRE)–Rex Energy Corporation (Nasdaq: REXX) and Stonehenge Energy Resources II, L.P. announced that their respective affiliates, R.E. Gas Development, LLC (“Rex”) and Stonehenge Appalachia, LLC (“Stonehenge”) have entered into an agreement for Stonehenge to construct a natural gas gathering and compression system to transport natural gas production from the Moraine East Area in Butler County, Pennsylvania.

Stonehenge will build the system in 2015 to gather Rex’s production in the Moraine East Area, where drilling commenced during the first quarter of 2015. The initial part of the system will consist of a 20-mile trunkline, various gathering lines and a compressor station, which will fully support the early production from the area. The system’s initial capacity of 400 MMcf/d could also be expanded to facilitate future development and growth in the Moraine East Area. The Stonehenge system will deliver gas to the Bluestone processing plant owned and operated by a subsidiary of MarkWest Energy Partners, L.P. (MarkWest) (NYSE: MWE).

This agreement is a critical component of our development strategy for the Moraine East Area, and we are excited to once again be partnering with Stonehenge for these essential services,” said Tom Stabley, Chief Executive Officer of Rex Energy. “The initial gathering system will provide ample capacity for our 2015 and 2016 development program, and the potential for expansion provides us with greater flexibility to support our future growth in the Moraine East Area.”

“This project allows Stonehenge to return to Butler County, again in support of the dominant producer in the area, Rex Energy. Work on the new midstream system is well underway, and we are focused on meeting the substantial production needs in this and subsequent years,” said Chuck Wilkinson, President of Stonehenge.

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Keystone Project

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

Stonehenge Energy Resources Sells Midstream Assets to MarkWest Energy Partners for $512 Million & Announces Formation of Stonehenge Energy Resources II

DENVER–(BUSINESS WIRE)–Stonehenge Energy Resources, L.P. (“Stonehenge”) announced today that it, together with its partners in Keystone Midstream Services, LLC (“Keystone”), closed on a transaction with a subsidiary of MarkWest Energy Partners, L.P. (NYSE: MWE) whereby MarkWest has acquired Keystone for a purchase price of $512 million, subject to adjustment for working capital. Stonehenge ( held a 60% interest in Keystone, with the remaining 40% owned by affiliates of Rex Energy Corporation (NASDAQ: REXX) and Sumitomo Corporation. Evercore Partners acted as exclusive financial adviser to Keystone on the transaction.

The Keystone system includes the Sarsen and Bluestone cryogenic gas processing plants with a combined 90 MMcf/d of capacity, a gas gathering system and associated field compression located in Butler County, Pennsylvania. The Bluestone plant has a nominal capacity of 50 MMcf/d and is in the final stage of commissioning.

Stonehenge, headquartered in Westminster, Colorado, is backed by Energy Spectrum Capital ( and supported by Kahuna Ventures LLC ( Energy Spectrum is a leading private equity firm located in Dallas, Texas. Kahuna is a midstream-focused engineering consulting company located in Westminster, Colorado.

Stonehenge Energy Resources II, L.P. (“Stonehenge II”) was recently formed to pursue natural gas midstream opportunities, focusing on the U.S. Appalachia and Rocky Mountain regions. Additionally, Stonehenge Ohio Partners, LLC (“Stonehenge Ohio”) has been formed to develop midstream projects in eastern Ohio. Stonehenge Ohio is owed by Stonehenge II and Hawk Midstream, LLC, an Ohio-based midstream company.

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