WDAY: The News Leader

Published April 11, 2011, 08:10 AM

Companies say ND wind turbine accident unique

BISMARCK, N.D. (AP) — Experts said a North Dakota wind turbine's rotor and blades crashed to the ground because they weren't properly aligned with a power shaft atop the turbine's steel tower, which caused the rotor's connecting bolts to fail.

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