Block Island Wind Farm generates electricity

Deepwater Wind tweeted this picture of the completed five-turbine wind farm off Block Island.

Deepwater Wind said Monday that its Block Island Wind Farm has begun commercial operations.

The company said it is the first offshore wind farm to make energy for the American power grid.

Power is transmitted to the mainland by an underwater cable.

The construction of five turbines in the water off Block Island was completed in August.

The $300 million project is expected to power about 17,000 homes.

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