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.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.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.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.royalihc.com/en/products/mining/dredge-and-marine-mining

Royal IHC is your ideal partner for wet mining, construction, operation and ... Integrated services and equipment for the dredge and marine mining markets.

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.nefsc.noaa.gov/publications/tm/tm209/pdfs/ch6.pdf

Raritan Bay that, although the mining company was required to refill the pit, remains .... to commercial shipping, offshore gas and oil exploration and drilling,.

www.nps.gov/yuch/learn/historyculture/drilling-rigs.htm

Dec 24, 2015 ... He would need not only a dredge but a specialized drill. ... In the early 1930s, Hillman began manufacturing gasoline-powered drills for the mining industry ... The company's larger model was the “Prospector,” which could be ...

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

Oct 13, 1987 ... This includes the cost of mining rights to 21,000 acres of Bering Sea floor and drilling through winter ice to determine whether profitable ...