The Wyoming Rolling Hills Wind farm is located near Glenrock in Converse county and has 66 turbines with a total nameplate capacity of 99 megawatts.
It is built on a former coal strip mine, and is owned by PacifiCorp, a subsidiary of MidAmerican Energy Holdings.
It has a nameplate capacity of 443.9 megawatts of power and was completed in December 2011.
The project was built for MidAmerican Energy Company, a Des Moines, Iowa-based company and subsidiary of MidAmerican Energy Holdings.
With 193 Siemens 2.3 MW wind turbines, it was the largest wind farm in Iowa when built.