Although only a modest 124 MW of new wind power was commissioned in the U.S. in the first quarter of 2007, the impressive number of projects currently under construction is expected to make this year the biggest one yet by far in terms of new capacity installations. Over 4,500 MW of wind power projects are in the process of being built for completion this year and early next year, according to reports from American Wind Energy Association (AWEA) member companies.

In the past, much of the development in the Midwest has taken place in Iowa and Minnesota, in part because of state regulations that encouraged wind power growth. Development in those states is not slowing down. In Minnesota, over 400 MW are under construction. Horizon is developing the 101-MW Prairie Star project; PPM Energy, the 150-MW Minn-Dakota project partially in Minnesota and partially in South Dakota; and enXco, the 205-MW Fentonwind farm.