Siemens is lined up to install its 2.3MW turbines on the Adams County project after it was selected as the preferred supplier for the development.
The utility said that it expects to complete the project by the end of 2015. It is yet to agree a power purchase agreement (PPA) for the sale of the energy. Obtaining construction consent will be the next key step for the project.
MidAmerican is also developing the Wind VIII 1.1GW project cluster in Iowa and has agreed for some of the power from this devlopment to be bought by Google under a PPA. The company expects to have 3.5GW of wind projects operating in the state by the end of 2015.
MidAmerican said that Siemens will manufacture the blades for the Adams County development at its plant in Fort Madison, Iowa. The companies have worked together on a number of projects previously, with Siemens 2.3MW turbines also to be used on the Wind VIII project.