MidAmerican, a regulated utility based in Des Moines, Iowa, first announced plans for Wind XI in April, and requested an expedited approval from regulators so it could capture the full value of the wind production tax credit (PTC).
Siemens, a major supplier to MidAmerican in the past, was expected by many to win the turbine order. But in June Vestas added to its momentum in the US by confirming it had conditionally won a supply deal for up to 1,000 of its V110-2.0MW
