MidAmerican Energy Co. has completed the three Iowa wind projects that were under construction in 2012. 

The projects, totaling 407 megawatts, further solidify MidAmerican’s ranking as the No. 1 rate-regulated utility in the U.S. in terms of ownership of wind-powered capacity, the company said in a news release.

With the completed projects, wind makes up 30 percent of the company’s generation portfolio, CEO Bill Fehrman said in the release.

In January, MidAmerican announced that it had acquired the 106-megawatt Vienna wind project, located in Marshall and Tama counties; the 200-megawatt Eclipse wind project, located in Guthrie and Audubon counties; and the 101-megawatt Morning Light wind project, located in Adair County. The three projects consist of 176 wind turbines.

The turbines were supplied by Siemens AG, with the blades manufactured at its Fort Madison plant. The Vienna project was constructed by M.A. Mortenson Co., and the Eclipse and Morning Light wind projects were constructed by Wanzek Construction.

In 2011, MidAmerican added 594 megawatts of new wind-powered generation in Iowa.

The company’s other owned wind projects are located in Buena Vista, Carroll, Crawford, Floyd, Hamilton, Polk, Pottawattamie, Sac and Wright counties, totaling 1,284 megawatts of wind generation capacity.

MidAmerican now owns 2,285 megawatts of wind generation. It began building wind energy projects in 2004 and has invested approximately $3.9 billion in wind-powered generation projects in Iowa.