Under terms of the agreement, Constellation Energy will purchase from Clipper Windpower the Criterion project and 28 of Clipper’s 2.5MW Liberty wind turbines. The Criterion project has received the necessary state approvals.

The agreement, which is subject to certain terms and conditions, is expected to close in the first quarter of 2010. Commercial operation of the wind energy facility is anticipated in the fall of 2010.

Mayo Shattuck III, chairman, president and CEO of Constellation Energy, said: “Constellation Energy remains committed to pursuing clean, green energy generation and conservation projects in Maryland. These projects have the potential to produce high-paying construction jobs while increasing and diversifying energy supply in the state of Maryland. The Criterion project is an ideal example of the kind of innovative and sustainable energy project that can help Maryland meet its ambitious renewable energy objectives.”

The Criterion project has entered into a 20-year power purchase agreement with the Old Dominion Electric Cooperative for energy and renewable energy credits produced by the wind facility. Old Dominion is a not-for-profit wholesale power provider serving public electric cooperatives in Maryland, Delaware and Virginia.

The proposed Western Maryland wind project is one of several renewable energy initiatives Constellation Energy has developed or is pursuing on behalf of public and private sector customers in the state.