Energy Private Equity Veteran, John J. Moon, Joins Riverstone Holdings from Metalmark Capital

Business Wire, March 7, 2007

NEW YORK -- Global energy investment firm Riverstone Holdings LLC announced today that John J. Moon has joined as a Managing Director. Riverstone currently invests in energy private equity from its $3.8 billion Global Energy and Power Fund III, L.P. and in renewable energy from its $685 million Renewable Energy Infrastructure Fund I, L.P. Mr. Moon will be engaged in all investment activities of the funds and will serve on the Investment Committee of both funds.

David M. Leuschen, Co-Founder of Riverstone, said, "In John, we have found both an experienced private equity investor who knows the energy industry and a person of integrity whom I have known for many years. I'm sure he will make a significant and immediate positive contribution to our business."

Pierre F. Lapeyre Jr., Co-Founder of Riverstone, said, "John is an experienced private equity investor with a proven record of success in the energy industry. John will bring new relationships and new perspectives as we continue to selectively expand our investment team and continue to focus on delivering attractive risk adjusted returns to our investors."

Mr. Moon joins Riverstone from Metalmark Capital LLC, where he served as a Managing Director. Metalmark Capital is a leading private equity firm established by the principals of Morgan Stanley Capital Partners to manage the Metalmark Capital and Morgan Stanley Capital Partners funds. Mr. Moon was a Managing Director involved principally with the energy investment activities at both Metalmark Capital and at Morgan Stanley Capital Partners. Mr. Moon served on the Investment Committees of both Metalmark Capital and Morgan Stanley Capital Partners. Prior to joining Morgan Stanley, Mr. Moon worked in the Investment Banking Division of Goldman, Sachs & Co.

Mr. Moon said, "Riverstone represents a truly unique platform for global energy investing. Its talented professionals and the scope of the organization are unparalleled in the energy investment field. I have known David and Pierre for a number of years as friends and friendly competitors. Now I am delighted to have the opportunity to join them as a business partner."

Mr. Moon earned his A.B. magna cum laude in Economics and his A.M. and Ph.D. in Business Economics from Harvard University. He is an adjunct professor of finance at the Columbia Business School.

About Riverstone Holdings LLC

Riverstone is a New York-based global energy and power focused private equity firm founded in 2000 by David Leuschen and Pierre Lapeyre. Riverstone has over $7.9 billion currently under management. Riverstone conducts buyout and growth capital investments in the midstream, upstream, power, oilfield service, and renewable energy sectors of the energy industry. To date, the firm has committed $5.4 billion to 34 investments across these five sectors. For more information on Riverstone, see www.riverstonellc.com.