enXco Signs Agreement with Wisconsin Public Service to Build a 99 MW Wind Farm

Escondido, CA.—April 22, 2008—enXco, an EDF Energies Nouvelles Company, has signed an agreement to build a 99-megawatt wind facility for Wisconsin Public Service Corporation, a subsidiary of Integrys Energy Group, Inc. Located near Riceville in Howard County, Iowa, the Crane Creek Wind Project will consist of 66 GE 1.5 megawatt wind turbines and is expected to generate electricity to provide for the energy needs of approximately 27,000 homes serviced by WPSC. The project recently won the approval of Wisconsin state regulators and is now subject to standard Iowa state and local permits.

enXco began working with members of the Community in the Spring of 2002, and expects to complete the final stage of development in 2008, with construction in 2009. Crane Creek Wind Project will then be transferred to Wisconsin Public Service upon completion.

"enXco is very pleased to be developing and constructing this project for WPSC. This is a culmination of a great cooperative effort by all involved and we look forward to working with the community as we move into the construction phase of the project." said Steve Peluso, Director of the Midwest Region for enXco.

About enXco, an EDF EN Company

enXco, Inc. (www.enxco.com) an EDF-EN Company (www.edf-energies.nouvelles.com) develops, constructs, operates and manages renewable energy projects throughout the United States. For more than two decades, we have been a leader in wind-energy focusing on large-scale wind projects. Today enXco's portfolio includes solar and biomass technologies, in an effort to help drive our nation's transition to a sustainable energy economy. enXco is a significant owner and developer of wind-energy installations in the United States, and is the largest third-party operations & maintenance provider for wind farms in North America.

About Wisconsin Public Service (WPS)

Wisconsin Public Service Corporation, a wholly owned subsidiary of Integrys Energy Group, Inc. (NYSE: TEG), is an investor-owned electric and natural gas utility headquartered in Green Bay, Wisconsin. It serves approximately 420,000 electric customers and 309,000 retail natural gas customers in residential, agricultural, industrial, and commercial markets, as well as wholesale customers. The company's service area includes northeastern and central Wisconsin, as well as an adjacent portion of Upper Michigan. Information is available online at www.wisconsinpublicservice.com.

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