Gold Hill's Yellow Jacket Disaster was probably the worst mining accident in Nevada history. On the morning of April 7, 1869, fire spread at the 800-foot level. As the day crew descended, smoldering timbers collapsed, flooding poisonous air into the Yellow Jacket and neighboring Kentuck and Crown Point Mines. Fortunately, shifts were changing or casualties would have been higher. Nevertheless, survivors described horrible scenes of miners desperately struggling for life.