The report was submitted in 1882. On June 11, 1859, after the Comstock Lode was discovered [this is the date given by Mines and Quarries 1902 by the U.S. Census Office, William Mott Steuart, United States.

The Comstock Lode was first discovered by Evan and Hosea Grosh in 1857. Between 1873 and 1882 the Comstock Lode and its “Big Bonanza,” yielded more than $100,000,000 and during the same time, two adjacent mines of the Bonanza Group produced the same amount. Comstock Lode Comstock Lode, rich deposit of silver in Nevada, U.S., named for Henry Comstock, part-owner of the property on which it was discovered in June 1859. In all, the group produced nearly 400 million dollars in ore by 1882 … They were prospecting brothers, but they died before they could officially... See full answer below. At one time Virginia City had a population of 40,000 people. Fieldwork began promptly in April 1880 and concluded in March 1881. Geology of the Comstock Lode (1882) On March 6, 1880 George Becker received instructions from Clarence King, Director of the U.S. Geological Survey to "report upon the Geology, Mineralogy, Chemistry, and Physics of the Comstock Lode." Today it’s America’s largest Historic District.