A blade on one of the 20 NedWind 500 kW turbines from the Netherlands, currently being erected in Palm Springs in California, has been severely damaged by turbulent winds. The rotor failed to cope with the region's feared horizontal wind shear, when two wind stratas blow in opposite directions within a narrow band. According to Raoul van Lambalgen, project leader for the California development, NedWind knew about the level of expected turbulence in Palm Springs but had not calculated with its destructive force. NedWind is now strengthening all the blades for the project and has changed the control programme for the turbines. By the end of June all 20 machines were due back on line.