Web Results

en.wikipedia.org/wiki/Dredging

Dredging is the operation of removing material from one part of the water environment and ... Dredging can be done to recover materials of commercial value; these may be ... trailing suction hopper dredge; but for rock works, drilling and blasting along ... Seabed mining: is a possible future use, recovering natural metal ore ...

www.loc.gov/resource/hhh.ak0008.photos/?sp=7

... ONE OF TWO DREDGES OPERATED BY ALASKA GOLD COMPANY - Hammon ... mining: - gold mining: - excavation: - dredges: - drilling & boring machinery ...

www.mining-technology.com/contractors/dredge/ihc

IHC Merwede companies have been building wet mining tools since the late 19th century. Among the first were, in 1887 the gold dredger DANAE (Italy) and in ...

www.norcalvaluation.com/drilling-dredging-aggregate-recycling-equipment-appraisal

Equipment appraisal for extractive industries—whether dredging, mining, drilling or recycling—demands an understanding of the extractive process and the ...

www.nap.edu/read/10318/chapter/5

The three major components of mining (exploration, mining, and processing) ... With the exception of proprietary data held by companies, detailed geologic ..... Almost all mineral exploration involves drilling to discover what is below the surface. .... quarrying, strip mining, contour mining, dredging, and hydraulic mining.

www.nytimes.com/1987/10/13/us/dredging-the-bering-sea-for-some-of-what-glitters.html

Oct 13, 1987 ... Bima, built in Singapore in 1978 and 1979 to dredge up tin ore from ... Inspiration Gold Company, a subsidiary of Inspiration Resources ... This includes the cost of mining rights to 21,000 acres of Bering Sea floor and drilling ...

www.tchistory.org/tchistory/more_gold.htm

Gold Mining in the US. ... By 1909, gold dredging had become big business and although there were a number of small one-dredge operators, the bulk of the ...

www.911metallurgist.com/placer-gold-dredges

Sep 12, 2017 ... This dredge was built for working the Mambuloa Placer Company's .... with the exploitation of the Chiksan Gold Mining Company's property in Korea. ... Drills and then in turn checked up these drilling results by pits and shafts.

www.commerce.alaska.gov/web/Portals/6/pub/NomeSuctionDredgeStudy.pdf

LARGE-SCALE COMMERCIAL OFFSHORE DREDGE OPERATIONS and recreational suction dredge mining have grown significantly in Nome since. 2011 . ..... Results of seismic surveys and drilling campaigns by the U.S. Geological Survey,.