風力發電廠
In 2017, construction was started on the third wind farm of MidAmerican Energy's Wind XI project. The North English Wind farm in Poweshiek County will consist of 170 2.0 MW Vestas turbines. The project is scheduled to be completed at the end of 2018. Work on two other wind farms in the project, the Beaver Creek wind farm and the Prairie wind farm, is expected to be finished the end of 2017.