United States wind energy policy
There are currently 5,600 MW of projects under construction in 2011. The U.S. Department of Energy's 2011 report "20% Wind Energy by 2030" envisioned that wind power could supply 20% of all U.S. electricity, which included a contribution of 4% from offshore wind power.
MidAmerican Energy Company
In addition to traditional power plants, MidAmerican Energy began investing in green energy
generation in 2004. As of March 2014, approximately 2,285 megawatts, or nearly 30 percent, of MidAmerican Energy’s total owned generation capacity came from energy generated by the company’s 1,267 wind turbines. In May 2013, MidAmerican Energy announced plans to invest up to $1.9 billion to expand its wind generation fleet and add up to 1,050 megawatts of wind generation in Iowa by year-end 2015. Siemens Wind Power, the manufacturer of the turbines, states that at the time (December 2013) this was the largest single order of onshore wind power turbines that any company had ever received. Components for the turbines are manufactured at two different sites in Iowa and Kansas, and all turbines are to be sited in Iowa. Once the expansion is complete, approximately 3,335 megawatts, or approximately 39 percent, of MidAmerican Energy’s total owned generation capacity will come from wind-powered generation from 1,715 wind turbines. MidAmerican Energy projects that wind power will supply one third of its energy generation by 2020. As of 2016, MAE operates 2 GW of SWP turbines and 1 GW GE Wind. In June 2016 MAE signed up for 2 GW in Iowa (Wind XI) supplied by Vestas in Colorado, estimated at $2.2 billion. On July 26, 2016, MAE agreed to supply power to Facebook, Microsoft and Google datacenters in Iowa from Wind XI.