Two arborists who were working to take down shade covers from the Pickathon Festival in Happy Valley were killed when a boom-lift fell over.
The incident happened Thursday afternoon at Pendarvis Farms where the music festival was held last weekend.
The Clackamas County Sheriff's Office reports the arborists had been ascending in a boom lift before climbing further up trees to get to ropes holding up the complex shade installation. They were wearing safety equipment and were roped to the boom lift, which was reportedly positioned on an incline.
The arborists were approximately 40 feet in the air when the boom lift tilted and fell.
Oregon OSHA is investigating.