The concrete tower, to go up at MidAmerican’s 154MW Adams wind project in Iowa, will hold a 2.3MW Siemens nacelle that will measure 377 feet (115 metres) from ground to hub. Its blades will reach a height of 554 feet – as tall as the Washington Monument.

Most of the wind turbines in MidAmerican’s existing fleet stretch 263 feet from ground to hub.

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