Energias de Portugal to Hold Press Conference on Its Acquisition of Horizon Wind Energy.

Goldman Sachs & Co.:

WHAT:        On Tuesday, July 10, 2007 there will be a press
             conference coinciding with the closing of Energias de
             Portugal's, S.A. ("EDP") acquisition of Horizon Wind
             Energy LLC ("Horizon"), a leading developer, owner and
             operator of wind power generation in the United States,
             from The Goldman Sachs Group. The transaction values the
             equity of Horizon at USD 2.74 billion. Antonio Mexia,
             CEO, EDP, will both discuss the transaction and take
             questions from reporters.

WHEN:        Tuesday - July 10, 2007
             9:30 a.m. - Lobby gathering and registration with
             continental breakfast
             10:00 a.m. - Antonio Mexia discusses the transaction
             10:30 a.m. - Kenneth Pontarelli, a Goldman Sachs
             managing director, and Antonio Mexia to sign final
             agreements for the deal's close
             10:35 a.m. - Antonio Mexia takes questions from reporters

WHERE:       Rainbow Room - 30, Rockefeller Center Plaza, 65th floor,
             NY 10112

ONSITE MEDIA
CONTACTS:    Rui Cabrita (EDP): [phone]
             Michael DuVally (Goldman Sachs): 914-649-9174
             Sarah Bray (Horizon Wind Energy): 832-226-2116

WHO:         Energias de Portugal (EDP), CEO - Antonio Mexia
             Goldman Sachs Group, Inc., Managing Director -
             Kenneth Pontarelli
             Horizon Wind Energy, Chief Development Officer -
             Michael Skelly

RSVP:        Sarah Bray, Horizon Wind Energy
             Cell: 832-226-2116
             Email: [e-mail]

About Energias de Portugal (EDP)

EDP is a vertically-integrated utility active in the electricity and gas industries across the entire value chain - generation, distribution and supply - in Portugal, Spain, and Brazil. Based in Portugal, EDP is the third largest integrated Iberian electric utility and one of the leading generators of electricity from renewable sources globally. In Portugal and Spain EDP has over 13,500MW of installed generation capacity and up to 7 million customers. EDP also has significant investments in energy generation and distribution assets in Brazil where it holds 62% of Energias de Brazil. In the renewables business, EDP currently owns over 1,600 MW of operating energy capacity in Iberia and France, with an additional 3,000 MW expected to be installed or in construction by the end of 2008. More information is available at: www.edp.pt

About Goldman Sachs & Co.

Goldman Sachs is a leading global investment banking, securities and investment management firm that provides a wide range of services worldwide to a substantial and diversified client base that includes corporations, financial institutions, governments and high net-worth individuals. Founded in 1869, it is one of the oldest and largest investment banking firms. The firm is headquartered in New York and maintains offices in London, Frankfurt, Tokyo, Hong Kong and other major financial centers around the world. More information is available at www.gs.com.

About Horizon Wind Energy:

Horizon Wind Energy develops, constructs, owns, and operates wind farms throughout the United States. Horizon is expected to be the third largest owner of wind power generation facilities in the United States by the end of 2007, with 1,324 net MW of generating capacity in operation. Horizon also has a high-quality portfolio of development projects across fifteen states, with combined aggregate generating potential of over 9,000 MW. More information is available at: www.horizonwind.com