Adolph Heinrich Joseph Sutro (April 29, 1830 - August 8, 1898) was born in Prussia (now Germany) and emigrated to San Francisco, California, arriving on the steamship California on November 21, 1850. He set up stores in San Francisco and Stockton. In 1859, when the Comstock Lode was discovered, he went into mining, setting up the Sutro Metallurgical Works, in East Dayton, Nevada. He also built the Sutro Tunnel, which allowed drainage and ventilation of the many mines in the Comstock Lode and to permit the miners to safely bring out the rich silver ore.