The co-generation plants are also likely to be successful.

The Grumman Corporation, for example, is expected to complete a $63 million co-generation plant by July.

"Dirty power" can be imported for coal-fired co-generation plants, and there is also gas.

In addition, the company develops two biogas-fuelled co-generation plants in Estonia.

The improvements include a $7.5 million co-generation plant, allowing it to generate its own electricity.

In 1985, the company chose to diversify into related, nonregulated businesses that include co-generation plants, land development and electrical construction.

Some will improve efficiency by building more co-generation plants, which use excess steam from electricity generation as a heat source.

The company has also diversified into nonregulated businesses that include co-generation plants, land development and electrical construction.

Propane is also a growing fuel source in electric co-generation plants.

Mr. Belmont said the utility was not trying to stop the construction of all co-generation plants.