It can process as much gravel as a larger three hundred-pound dredge, some twenty years ago.
Two Divers operating a New Keene 4 inch Dredge in shallow water.Ī small portable backpack dredge of today can weigh as little as forty pounds and cost around eight hundred dollars. Dredges of today are lighter, more portable and more efficient than ever. The divers worked futility on the bottom of the rivers with heavy diving helmets and cumbersome diving suits.Īlthough history reveals that dredging has been in existence throughout the world for many years, it is just recently that it has reached such a high degree of popularity due to advanced technology in dredging equipment. As time progressed and as they became more experienced, they realized that the deeper gavels in the riverbeds were often richer than the surface gravel along the banks.In the early 1900s, several crudely built steam powered dredges were active on some of the northern rivers of California. Their equipment was limited to gold pans, sluice boxes and rockers. In the beginning of the Gold Rush, the miners were limited because they could only work the areas that were accessible to hand tools along the banks of the streams and rivers. You might try the link as it has pictures I could not get to upload
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