アイアンキング
One of the early important mines was the nearby Iron King Mine, but its over promotion in the early 1900s, with the panic of 1907, caused it to close temporarily. It was reopened during the high mineral market prices of World War I. After World War I, a post-war economic down turn caused the smelter and mine to close again. Revival came by the mid-1920s and the local farm and mine economy prospered until the Wall Street crash of 1929 hit. Mines and the smelter closed, and by 1930 the population of Humboldt had dwindled to 300. Humboldt had a second but smaller boom in 1934 when the mine reopened, but its duration of operation would be longer under the Shattuck-Denn company of Bisbee, Arizona fame. The Iron King became the most productive mine in the Bradshaws, and produced $100 million in gold, silver, lead and zinc before its closure in 1968.