![]() ![]() 14,500 cu-yd of paydirt could be processed per day by a big dredge, scooped by bucket line, washed in an internal wash plant, caught in an internal sluice box system, with tailings dumped out the back on a conveyor. They were in great use for a half century before that. Prior to Tony's attempt, no industrial floating dredge had been used in the Klondike for a quarter century. It scoops or pumps/vacuums the bottom of the watercourse and pushes it onto the wash plant.įloating industrial dredges had been used in the Klondike for a long time, since 1901. It should be assumed that all mines are on private property.A dredge is a piece of mining equipment used on watercourses. The locations and other information in this database have not been verified for accuracy. Plumas County has eight gold mines that the USGS identifies as significant producers, which is notable given that it is not uncommon for many counties in the West to have no mines considered significant.Įl Dorado County contains at least 20 historically important gold mining districts.Įl Dorado County historical mining featuresĪll mine locations were obtained from the USGS Mineral Resources Data System. Gold mines are the most common mine type, with 2,334 mines being listed with gold as a primary commodity. Image from the WMH Mine Discovery Tools for Google Earth illustrates gold mine distribution in part of El Dorado CountyĮl Dorado County has 2,599 mine records in the USGS MRDS database, making it one of the top mining counties in the nation. ![]() WMH Mine Discovery Tools for Google Earth are available for El Dorado county El Dorado County is the site of the 1848 gold discovery at Coloma that initiated the great California Gold Rush. ![]()
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