"Operations for the extraction of gold from the gravels of this river, were started about ten years ago, at which time it was attempted by means of hydraulic elevators, later by means of the early type dredge, Risdon design, of which three were installed, and later still, an early type Bucyrus Dredge. These all resulted in failure, some alleged to have been due to impossibility of reaching bed-rock; small yardage capacity; and fraility [sic] of design. these have been overcome in the latest type of dredge constructed by the Bucyrus Company, description of which follow later. Dredging here, differs from that in California, and most places, owing to the fact that the digging must be done on the original channel of the stream; the course of the stream at the time of the deposition of the gold. The present stream is at times, several hundred feel of original channel. As practiced elsewhere, the entire area is dredged. Here, away from the channel, dredging could not be conducted at a profit"--page 1.
Mining and Nuclear Engineering
Professional Degree in Mining Engineering
Missouri School of Mines and Metallurgy
20 pages, 5 plates
Swan River (Colo.)
© 1910 Henry W. Lohman, All rights reserved.
Thesis - Open Access
Library of Congress Subject Headings
Gold dredging -- Colorado
Gold dredging -- Colorado -- Swan River
Gold mines and mining
Print OCLC #
Electronic OCLC #
Link to Catalog Recordhttp://laurel.lso.missouri.edu/record=b2610054~S5
Lohman, Henry William, "Dredging, Swan River, Colorado" (1910). Professional Degree Theses. 160.