ArcLight Completes $518 Million Co-Investment Transaction Supporting Enogex Investment

BOSTON, July 7, 2011 /PRNewswire/ -- ArcLight Capital Partners, LLC ("ArcLight") today announced that its affiliate, Bronco Midstream Holdings, LLC ("Bronco"), has closed $518 million of co-investor commitments to support ArcLight's investment in Enogex Holdings, LLC.  The co-investor group was led by affiliates of China Investment Corporation, Government of Singapore Investment Corporation Pte Ltd, John Hancock Financial Services and The Northwestern Mutual Life Insurance Company among a total group of 11 investors. Including commitments from funds managed by ArcLight and the co-investor group, Bronco will be able to support Enogex with over $1 billion of growth capital.

Daniel Revers, Co-Founder and Managing Partner of ArcLight, stated, "We are pleased to complete this important co-investment transaction with leading global institutions recognized for their sophistication and active participation as investors in the US energy infrastructure market.  The transaction is representative of the value that ArcLight is able to bring to its limited partners, portfolio companies and corporate partner relationships."

As initially announced in October 2010, Enogex Holdings is a joint venture between OGE Energy Corp. ("OGE") and ArcLight.  The joint venture owns Enogex LLC ("Enogex"), an integrated midstream infrastructure company which provides natural gas gathering, processing, pipeline transportation and storage services in the Mid-Continent of the United States.

"Enogex's established asset base and strategic position within the US natural gas network provide the company significant and attractive growth opportunities from the continued development of the large unconventional natural gas resource plays now being actively pursued in the Mid-Continent and elsewhere," said Robb Turner, Co-Founder and Senior Partner of ArcLight.  "We and our co-investor partners are excited to be working with OGE and the management of Enogex during this unique period of opportunity for the company."

About ArcLight Capital Partners, LLC 

ArcLight is one of the world's leading energy investment firms having invested over $8.5 billion of equity since its inception a decade ago. ArcLight has successfully sourced, managed and realized investments through multiple energy industry cycles. The Firm's investment team has extensive energy expertise, investing experience, industry relationships, and specialized asset level value creation capabilities.  ArcLight is headquartered in Boston, Massachusetts with offices in NewYork City, Barcelona and Luxembourg. More information about ArcLight can be found at http://www.arclightcapital.com.

SOURCE ArcLight Capital Partners, LLC