Related Links: The U.S. Energy Policy Finally Emerges California Plant To Double U.S. Solar Thermal Power Production Solar Sees Growth But Clouds Loom In December, MidAmerican Energy Holdings Co. placed the world's largest-ever order for onshore wind turbines, estimated at $1 billion for 448 units totaling 1,050 MW, to be installed on five Iowa wind farms. Despite its size, the large capacity is not unusual for Iowa, which already boasts 5,571 MW of installed wind capacity, generating 27.4% of its electricity mix.Amid growth in wind-generation nationwide, Iowa's is the highest proportion for any state. According to the Energy Information Administration,
The market is generally healthy and steadily growing, and margins are up for large specialty contractors. Further, advances in design tools and owner demand for collaboration are giving subcontractors a seat at the table early on in projects.