The mining industry was dominated by foreign born men. Of the 665 men listing their occupation as miner, 37 percent were of European birth and almost 28 percent were from China. Of course, it was primarily U.S. born men who comprised the gold rush of 1849. The initial gold rush wave of miners scoured the river beds of placer gold. The majority of mining in 1860 was the washing of high and dry ground for placer gold with water supplied by the Natoma ditch system.
