The company brought the 29 MW Happy Jack Wind power Project in Cheyenne on line in September 2008 and plans to complete its 99-MW Campbell Hill Wind power project near Casper by the end of 2009.

As part of the Silver Sage project, Duke Energy entered into 20-year power purchase agreements to sell all of the electricity generated at the site to Cheyenne Light Fuel & Power (CLF&P), a utility subsidiary of Black Hills Corp., and Colorado-based Platte River Power Authority.

The purchase of these turbines will enable Duke Energy to start construction at Silver Sage this spring and target the end of 2009 for the project’s completion.

The Silver Sage project is another sign of the momentum we’re building in our renewable energy business, said Wouter van Kempen, president of Duke Energy Generation Services, a business unit of Duke Energy that owns and develops renewable power assets. Projects such as Silver Sage are helping Duke Energy meet the growing demand for electricity produced from clean, inexhaustible sources like wind.

We are pleased to continue our partnership with Duke Energy, said David R. Emery, Black Hills chairman, president and chief executive officer. This agreement affirms our commitment to be an environmental steward and use a diversified portfolio to deliver economical energy to our customers. Black Hills buys all of the output from Duke Energy’s Happy Jack project under a separate power purchase agreement.

Our arrangement with Duke Energy on Silver Sage illustrates how we’re using environmentally progressive, renewable sources to meet the energy needs of the communities we serve, said Platte River general manager Brian Moeck.