It happened at Camp Illiana in Washington, Indiana on Monday morning.
60-year-old David Ira-Mitchell Bean and camp staff member Cody Chapman were trying to remove a large, dead tree near a water slide.
They cut the tree at its base and Chapman was trying to pull it down with a rope attached to a tractor.
The rope broke and a large tree limb fell, hitting Bean's head.
Camp staff gave first aid while calling 911.
Bean was later pronounced dead at the scene.
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