Clipper Windpower has struggled to compete against big wind turbine makers like General Electric, Siemens and Vestas.

FORBES: A Powerful New Rival For GE In Wind

Acciona Energia, Clipper Windpower and Siemens USA now operate wind manufacturing facilities in the state, and last month Culver's office announced that TPI Composites will open a plant in Iowa to build turbine blades for GE Energy.

FORBES: Magazine Article