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Author: Clark C. Spence Publisher: University Press of Colorado ISBN: 1607324741 Category : History Languages : en Pages : 342
Book Description
"A revolution in placer mining from inception in the 1880s until its demise in the 1960s and its impact on Idaho, the nation's fourth leading producer of dredged gold which provides a lens through which to observe the practice and history of gold dredging around the world"--
Author: Clark C. Spence Publisher: University Press of Colorado ISBN: 1607324741 Category : History Languages : en Pages : 342
Book Description
"A revolution in placer mining from inception in the 1880s until its demise in the 1960s and its impact on Idaho, the nation's fourth leading producer of dredged gold which provides a lens through which to observe the practice and history of gold dredging around the world"--
Author: Charles Janin Publisher: ISBN: 9781331938842 Category : Technology & Engineering Languages : en Pages : 324
Book Description
Excerpt from Gold Dredging in the United States Types of hand drills; Empire drill; New type of light power drill; Determining period of dredging project; Selection of dredge for a given project; Use of unusual type of drill in Alaska; Details of construction of gold dredges; Determining suitable size of dredge; Bucket line and tumblers; Pins; Lower tumbler; Upper tumbler; Main drive; Winches; Ladder-hoist winch; Swing winch; Spuds and spud supports; Hulls and superstructures; Bow gantry; Ladder rollers and bearings; Main hopper, save-all, and bucket idlers; Screen and screen drive; Distributor; Stacker; Belts; Guide rollers; Wire ropes; General details of dredge construction; Special steels for dredge parts; Properties of alloys of steel; Manganese steel; Nickel steel; Nickel-chrome steel; High-carbon steel; Electrical equipment on dredges; Bucket-drive motor; Power consumption by electrical equipment; Recent type of direct-connected motor drive; Kind of electric current used; Voltage of current used on dredges; Rebuilt dredges; Feasibility of moving dredges or machinery; Examples of second use of dredges or machinery; Tin Cup dredge; Scott River dredge; Butte dredge; El Oro No. 1 dredge; Dredge near Leadville, Colo; Castle Creek dredge; Feature to be considered in removal of dredging equipment; Other examples of moving dredge; Operation of gold dredges; Essentials of dredge operation; Ample spare parts should be available About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: Clark C. Spence Publisher: University of Illinois Press ISBN: 9780252022180 Category : Alaska Languages : en Pages : 512
Book Description
The Northern Gold Fleet is the story of how new gold-dredging technology was applied to the rich placers of the Far North from 1899 to the present, leading to mass production and economies of scale that made previously unprofitable resources profitable. The bucket-ladder dredge was a single, complex apparatus that rivaled ocean freighters in size. At once ugly, spectacular, and awesome, the dredges dug, classified materials, and performed gold-saving and tailing-disposal functions. A richly illustrated and comprehensive history. The Northern Gold Fleet is part environmental, part technological, part corporate, part labor, and part Alaskan in its thrust, offering a picture - both dazzling and absorbing - of how new technology simultaneously helped build the economy and lay waste the resources of Alaska.
Author: Maria Reeves Publisher: Epicenter Press ISBN: 9780578011592 Category : Gold dredging Languages : en Pages : 0
Book Description
Gold Dredge No. 8 is one of the most significant relics of mining history in Alaska. Currently located at her final resting place, just north of Fairbanks, dredge No. 8 was dubbed the "Queen of the Fleet" during her years of operation in the Goldstream Valley. Gold Dredge No. 8 is the only landmark of its kind that is open to the public. Every summer, she provides a wonderful experience to thousands of visitors who come to Fairbanks looking for adventure and the chance to experience firsthand the history for which Fairbanks's mining pioneers are renowned. Author Maria Reeves explores the history of Gold Dredge No. 8 as well as visionary men, lie Norman C. Stines and James M. Davidson, who made dredging in the Fairbanks district not only a reality, but also provided enough economic stability to bring the struggling town of Fairbanks back to life. Gold Dredge No. 8 was a placer mine that drew water from another local engineering landmark, the Davidson Ditch. In this book, you'll learn about the crew that operated Gold Dredge No. 8 as well as the hardships these dredge men faced on a daily basis. You'll be able to take a photographic tour of Gold Dredge No. 8 as she is now, and learn about efforts to preserve Pleistocene fossil remains that were unearthed during the stripping process. You'll learn why the gold standard initially helped mining and find out why Gold Dredge No. 8 was shut down in 1959.
Author: Clark C. Spence Publisher: University Press of Colorado ISBN: 160732475X Category : History Languages : en Pages : 342
Book Description
A History of Gold Dredging in Idaho tells the story of a revolution in placer mining—and its subsequent impact on the state of Idaho—from its inception in the early 1880s until its demise in the early 1960s. Idaho was the nation’s fourth-leading producer of dredged gold after 1910 and therefore provides an excellent lens through which to observe the practice and history of gold dredging. Author Clark Spence focuses on the two most important types of dredges in the state—the bucket-line dredge and the dragline dredge—and describes their financing, operation, problems, and effect on the state and environment. These dredges made it possible to work ground previously deemed untouchable because bedrock where gold collected could now be reached. But they were also highly destructive to the environment. As these huge machines floated along, they dumped debris that harmed the streams and destroyed wildlife habitat, eventually prompting state regulations and federal restoration of some of the state’s crippled waterways. Providing a record of Idaho’s dredging history for the first time, this book is a significant contribution to the knowledge and understanding of Western mining, its technology, and its overall development as a major industry of the twentieth century.
Author: Clark C. Spence
Author: Clark C. Spence
Author: Charles Janin
Author: Clark C. Spence
Author: United States. Bureau of Mines
Author: 
Author: United States Gold Dredging and Rubber Company
Author: CHARLES. JANIN
Author: Maria Reeves
Author: Clark C. Spence
Author: Henry Stanhope Bunting