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Dredging for Gold in California - by D'Arcy Weatherbe - Large River Dredges once worked up and down the major tributaries of the California Mother Lode and Klamath Mountains. These Dredges moved massive amounts of material but where not all that efficient leaving plenty behind. Today Metal dectorists find lots of gold left behind by these behemoths. This book covers specifically the River Dredges that worked in California. In addition to the great historical resource, this book covers the geology of where these dredges worked, whether or no they could get to bedrock or not, the types of recovery methods they used to recover the gold and much more. Lots of great historical pictures, maps of the areas worked, diagrams for sluice box design and more.