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Aviation Marker Ball Installation on the Big Eddy-Knight 500kV Transmission Line Transmission

Aviation Marker Ball Installation on the Big Eddy-Knight 500kV Transmission Line

Client Bonneville Power Administration (BPA)
Completion Date November 2016
Location The Dalles, Oregon
Completed by Sturgeon Electric Company, Inc.

Sturgeon Electric crews installed 23 aviation marker balls and associated hardware atop BPA’s Big Eddy-Knight 500kV Transmission Line. The project marked the first time a federal nonprofit agency allowed a transmission line contractor to use Class B Human External Cargo (HEC) helicopter methods, which involves flying line workers below a helicopter in an “air chair” to accomplish the required work.