MidAmerican Energy Co., which in May announced plans to develop up to 1,050 megawatts of additional wind energy generation capacity in the state, on Wednesday listed the companies it will partner with to complete those projects. Construction activity is now underway at each of the five project sites. The Des Moines-based utility company recently reached agreements with:

  • Highland Wind Energy LLC, an Invenergy Wind LLC company, for the acquisition of the approximate 500-megawatt Highland wind project site in O'Brien County;
  • EDF Renewable Energy for the acquisition of the approximate 250-megawatt Lundgren wind project site in Webster County;
  • Two RPM Access LLC companies for the acquisitions of the approximate 138.6-megawatt Wellsburg wind project site in Grundy County and the approximate 117-megawatt Macksburg wind project site in Madison County.

In addition, MidAmerican Energy's existing Vienna wind farm, constructed in 2012, is being expanded by 44.6 megawatts in Marshall County. MidAmerican Energy has selected Siemens Energy through a competitive bid process as the turbine supplier for all project sites. All of the blades for the expansion will be manufactured at Siemens' Fort Madison facility, while the nacelles will be manufactured at Siemens' Hutchinson, Kan., plant.


The Highland, Macksburg and Wellsburg wind projects will be constructed by Mortenson Construction, which is based in Minnesota, while the Lundgren and Vienna wind projects will be constructed by Wanzek Construction Inc., which is based in North Dakota.


Once complete, the new wind projects, which will consist of 448 wind turbines, will generate enough electricity to power the equivalent of approximately 317,000 average Iowa households.


About 1,000 construction jobs will be added to Iowa's economy during the two-year construction period, and approximately 40 new permanent jobs will be added when the expansion is complete.