CHARLOTTE, N.C. (

TheStreet

) --

Duke Energy

(DUK) - Get Report

is adding to its stable of wind farms in Wyoming.

According to a press release today, the Charlotte-based electric power provider says it will build a 200-megawatt wind project on around 17,000 acres near Casper, Wyoming. It's expected to be up and running by the end of 2010 with construction expected to begin later this year or early next, and may generate enough electricity to power 50,000 to 60,000 homes per year.

PacifiCorp

will buy power from the so-called "Top of the World" project in a 20-year power-purchase deal.

Further, Duke Energy says this will be the company's ninth U.S. wind farm, marking a total of four in the Cowboy state.

Shares of Duke were down 12 cents, or 0.8%, at $15.49.

General Electric

(GE) - Get Report

, which is providing at least 66 turbines for the project, was losing 22 cents at $13.86. Duke is still negotiating for the remaining turbines needed for the project.

Elsewhere in the wind technology sector, shares of

Siemens

(SI) - Get Report

, which also makes wind turbines, were down 66 cents at $86.64.

-- Reported by Sung Moss in New York

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