The Tennessee Valley Authority is moving ahead with one of the first wind power projects in the Southeast as part of a larger plan to market “green” power to customers willing to pay a little extra on their monthly electricity bills. TVA has contracted with a California company, EnXco, to construct three 290-foot-high turbines on Lookout Mountain in Chattanooga, Tenn., on land owned by a local college. If the pilot program is successful, EnXco wants to build a larger windmill farm in the state. Some locals have voiced concerns about the noise and disturbed views that could result from the turbines, but most enviros have praised the TVA for moving toward clean energy.