» Suction Dredging for Gold
“Covering the Basics of Suction Gold Dredging” The Suction Dredge. Dredging on Bedrock. Most gold mining today is done in small operations — one or two persons working at a time — often with the use of suction dredges. A suction dredge is a powerful underwater-type of vacuum cleaner. It sucks up streambed material (rocks, sand, gravel,Studies of Suction Dredge Gold-Placer Mining Operations,,Studies of Suction Dredge Gold-Placer Mining Operations Along the Fortymile River, Eastern Alaska USGS Fact Sheet FS–154–97 October 1997 U.S. Department of the Interior U.S. Geological Survey The U.S. Geological Survey (USGS) and the Alaska Department of Natural Resources (AKDNR) are investigating the environmental geochemistry of theGold dredge - Wikipedia,A gold dredge is a placer mining machine that extracts gold from sand, gravel, and dirt using water and mechanical methods. The original gold dredges were large, multi-story machines built in the first half of the 1900s. Small suction machines are currently marketed as "gold dredges" to individuals seeking gold: just offshore from the beach of Nome, Alaska, for instance.