When it comes to gold mining during the California Gold Rush, what many people visualize is a gold miner hunched over at a river panning for gold with a tin pan. For placer mining during the Gold Rush, using a gold pan didn’t last long and more environmentally destructive practices were used. In this video, Kathy discusses hydraulic mining. Hydraulic mining involved using large high-pressure water cannons to wash away hill sides looking for gold veins in quartz. Although it was successful in ext