Exhibit 99(a)(5)(vi)

                 TRIGEN AND ELYO ANNOUNCE DEFINITIVE AGREEMENT

WHITE PLAINS, N.Y. and NANTERRE, France, Jan. 19 /PRNewswire/ -- Trigen Energy
Corporation (NYSE: TGN) and ELYO, an energy subsidiary of the Suez Lyonnaise des
Eaux Group, jointly announced today that they have entered into a definitive
agreement for ELYO to purchase all the outstanding shares of Trigen it does not
already own for $23.50 a share in cash. ELYO's subsidiaries currently own
approximately 53% of Trigen common stock.

The Trigen Board of Directors approved the merger agreement after a Special
Committee of independent directors, with the advice of Credit Suisse First
Boston and legal counsel, Troutman Sanders, had determined that the transaction
was fair to Trigen shareholders.

Trigen will retain its name and headquarters in White Plains, N.Y.

Trigen also announced that effective today, Richard E. Kessel, currently
executive vice president, chief operating officer and a director of Trigen,
was elected president and chief executive officer. Mr. Kessel joined Trigen
in 1993, when the company acquired United Thermal Corporation (UTC: NASDAQ)
where he was CEO. He also serves as chairman of the board's executive
committee. He succeeds Thomas R. Casten who has resigned to pursue other
interests.

Michel Bleitrach, chairman and chief executive officer of ELYO, said, "We
appreciate the invaluable contribution that Tom Casten has made to Trigen's
success. Tom has built an experienced management team, which will now be led by
Rich Kessel. We have every confidence that Rich and his team possess the skills
and vision needed to address the energy outsourcing needs of customers in the
rapidly evolving energy markets of North America."

Tom Casten stated,"It has been an honor to lead Trigen employees in developing
energy systems that reduce costs and pollution. In this daunting pursuit, the
men and women of Trigen have continually exceeded my own expectations in
changing the way the world makes power. Society will benefit from Trigen's
continued success. I wish Trigen well as I address new challenges."

Christine Morin-Postel has been elected a Trigen director and appointed to the
post of non-executive chairman, replacing George Keane, who will remain a
director of Trigen. Ms. Morin-Postel co-founded Trigen with Mr. Casten in 1986
and currently serves as chief executive officer of Societe Generale de Belgique,
the parent company of ELYO and Tractebel. She also is a member of the executive
committee of the Suez Lyonnaise des Eaux Group.

Ms. Morin-Postel commented, "I am looking forward to my new role at Trigen,
working with Rich and all the employees of Trigen. I would also like to
acknowledge Tom Casten's leadership at Trigen for these many years."

Trigen is a leading developer, owner and operator of industrial, commercial and
institutional district energy and combined heat and power (CHP) systems in North
America. The company serves more than 1,500 customers with energy produced at 49
plants in 20 states, Canada and Mexico.