
	Where results make sense

Topic: Hydraulic mining

Related Topics

Old growth forest

Rail terminology

Logging

Los Angeles International Airport

Northumberland

In the News (Tue 14 Feb 12)

EXECUTIVE POWER

Iran

ANALYSIS

Pakistan

Family compact

	The Gold Ledge - River Mining
		iver mining is a branch of placer mining that is carried on in the channels and beds of rivers and large streams.
		Hydraulic mining from 1857-58 practically extinguished river mining in many of the rivers by reason of tailings covering up the river claims, and it is only since 1880, coincident with the restriction of hydraulic mining, that the attention of mining men has been directed to the river channels.
		The winter floods, with the cessation of hydraulic mining, are now ground sluicing on a tremendous scale, washing the tail-ings that have been slacking and disintegrating for years, and concentrat-ing the gold they contain into a smaller bulk of gravel.
	www.goldledge.com /history/docs_html/river_mineralogists_report.html (966 words)

	Hydraulic Mining - CPRR Photographic History Museum
		Hydraulic mining uses jets of water to break down gold-laden gravel banks and to wash the material through gold-separating devices (sluices and under-currents).
		During those 30 years, it is estimated that hydraulic mining yielded over $100 million in gold, or one third of the total gold produced by California in that period.
		Drift mining (tunneling into the bottom of the Tertiary gravel beds) was a costly and risky way to reach the richest deposits, but most of the gold was scattered as fines throughout the gravels.
	cprr.org /Museum/Hydraulic_Mining (1381 words)

	Tailings.info ::: Hydraulic mining of tailings
		Hydraulic mining monitors used today were first developed back in the early sixties by English China Clays, Cornwall, England.
		It can be noted that the use of hydraulic mining for tailings can be to either reprocess the waste, mine the waste as a product, or for moving of the tailings to a more suitable location.
		During the mining operation the screened material is then pumped to a header tank almost 5km away at a height elevation of 200m.
	tailings.info /hydraulic.htm (681 words)

	California Gold Mining Terms and Procedures - 1876
		Thus originate the “river-bed claims,” to mine which the streams are turned from their courses; “bar-claims,” where the gold is mined at low water; “bench-claims,” where the bars are on narrow table-lands, once the beds of rivers; and “flat-claims,” where the wash of rivers has been spread over a level space of country.
		Before describing the modes of mining at present generally adopted, it will not be amiss to state the methods of obtaining the gold in the “Fall of ‘49 and the Spring of ‘50.” It was not until about 1852 that what has become known as hydraulic mining was begun.
		The mining interests should not be overlooked, neither should the soil of the State be irreparably injured for the gold which is obtained by hydraulic mining.
	www.sfmuseum.org /hist9/turrillgold.html (4309 words)

	Untitled Document
		Hydraulic Mining produced large amounts of gold, and toward the end of the 1860's hydraulic mining got underway at a large-scale producing large amounts of tailings.
		Hydraulic mining was extremely expensive, so mine owners sought investors in order to operate their mines.
		Hydraulic mining stripped the land of all vegetation creating the perfect condition for disaster as the rains came and the snow melted in the spring; flooding was a common site as mud came rushing down from the mountains into the towns and valleys.
	www.hopiidesign.com /PhotoEssay.html (734 words)

	Summit Historical Society of Summit County (Site not responding. Last check: 2007-10-13)
		Placer mining methods were used to recover gold nuggets and flakes that had been eroded from the rocks of the surrounding mountains and had been deposited in streams and rivers.
		Hydraulic mining techniques used very large, high capacity water hoses and nozzles to wash loose, unconsolidated gravels through placer mining recovery equipment.
		Additionally, the mine has a fully equipped assay office from a former mining operation in which SHS guides will explain how "fire assays" were done in the 1860 - 1900 mining era to determine the gold and silver content of samples brought in by miners and prospectors.
	www.summithistorical.org /Lomax.html (407 words)

	Hydraulic mining - Wikipedia, the free encyclopedia
		Hydraulic mining, or hydraulicking, is a form of mining that employs water under pressure to dislodge rock material or move sediment.
		Insofar as California hydraulic mining exploited primarily river gravels, it was one form of placer mining; that is, working of alluvium (river sediments).
		North Bloomfield Gravel Mining Company made its way to the United States District Court in San Francisco where Judge Lorenzo Sawyer decided in favor of the farmers in 1884, declaring that hydraulic mining was “a public and private nuisance” and enjoining its operation in areas tributary to navigable streams and rivers.
	en.wikipedia.org /wiki/Hydraulic_mining (905 words)

	gold rush
		Hydraulic mining was particularly successful due to the relatively low labor costs coupled with the fact that many hundreds of cubic yards of gravel could be processed in a matter of hours.
		Mines that had formerly measured tunnel and shaft lengths in the hundreds of feet could now boast of miles of tunnels (the Kennedy Mine had 150 miles; the nearby Argonaut Mine had 62).
		One of the most enduring problems of the gold rush mines is the contamination of the soil and water by the mercury and arsenic, as well as by the acids released during the milling process.
	virtual.yosemite.cc.ca.us /ghayes/goldrush.htm (2601 words)

	Hydraulic Mining
		Hydraulic mining is another kind of surface mining.
		This was used in the 1800s to find gold after placer mining had already been used.
		Even though a few mines kept working until the 1960s, hydraulic mining was stopped because it hurt the environment.
	library.thinkquest.org /05aug/00461/hydraulic.htm (193 words)

	North Bloomfield
		Although hydraulic mining, described as “a devilishly successful method of blasting gold from the ground,” was born when Antoine Chabot first used a hose to wash loose gravel on his claim at Buckeye Hill, it was here at the Malakoff Mine that the method realized its full potential.
		This method of mining consists of simply blasting a hillside with tremendous, high-pressure streams of water shot from a giant nozzle known as a “monitor.” These jets of water were so powerful that a strong man could not strike a crowbar through a six-inch stream.
		The farmers, who were not about to let hydraulic mining destroy their land, fought back and by June of 1883 a landmark case was being heard in the courtroom of Judge Lorenzo Sawyer.
	www.malakoff.com /goldcountry/northblo.htm (1230 words)

	Colorado mining history photographs Mining Bureau History gold silver
		During the early years, when mining was confined to the gravels and to the gossans of the veins and the ores obtained were soft and free milling, they could be cheaply mined and amalgamated with the aid only of such simple devices as sluices, cradles, arrastres, and crude stamp mills.
		As mining progressed and depths of 50 to 100 feet were attained on the veins, the oxidized ore began to give way to sulphide ores, which could not be treated profitably by such simple methods.
		Collier #167 Hydraulic mining also known as booming back then is a mining method that uses hoses carrying high pressure water to spray the gravel deposits, which washes all but the largest rocks into the sluice boxes where most of the gold is recovered.
	miningbureau.com /mining/index.htm (2205 words)

	Mercury Contamination from Historic Goldmining in California
		High mercury levels in fish, amphibians, and invertebrates downstream of the hydraulic mines are a consequence of historic mercury use.
		As mining progressed into deeper gravels, tunnels were constructed to facilitate drainage and to remove debris from the bottom of hydraulic mine pits.
		Hydraulic mines operated on a large scale from the 1850s to the 1880s in California's northern Sierra Nevada region, where more than 1.5 billion cubic yards of gold-bearing placer gravels were worked.
	ca.water.usgs.gov /mercury/fs06100.html (2327 words)

	Gold Fever Giant Gold Machines - Hydraulic Mining
		Hydraulic monitors blasted 1.5 billion cubic yards of soil and rocks from the Sierra hillsides.
		It was a battle cry in the war between the hydraulic miners and the valley farmers in the 1870s and 1880s.
		The rivers remained the dumping-ground for mining debris.
	www.museumca.org /goldrush/fever19-hy.html (482 words)

	Hydraulic Mine Report
		The hydraulic mining method enjoyed its greatest success in the 15 m thick No. 10 Seam in the South Balmer Mine (operated in succession by Kaiser Resources, B.C. Coal and Westar) where coal was produced for more than 12 years with better costs and productivities than the adjoining surface mine.
		One considerable advantage of the use of hydraulic mining methods is that if it is employed, it significantly increases the amount of high quality coking coal that can be recovered from Western Alberta.
		Surface mines will be fought tooth and nail by environmentalists, and the technologies required for safe and economic operation of underground mines in steep thick seams are outdated.
	www.rokdok.com /mining/pubs/hyd.htm (757 words)

	Surface Mining Method - Hydraulicking (Site not responding. Last check: 2007-10-13)
		In hydraulic mining, or "hydraulicking," a stream of water under great pressure is directed against the base of the placer gravel bank using pipes and large nozzles called giants.
		Hydraulic mining totally disturbs large surface areas, puts much loose debris into the drain age system, and involves large surface water runoff that may cause substantial damage downstream.
		Many of the western States passed laws years ago to closely control "hydraulicking," and few substantial deposits of placer gravel remain that could be mined economically within the restraints of this legislation.
	www.digistar.mb.ca /minsci/surf/hydraulic.htm (112 words)

	Historical Bathymetric Change in Suisun Bay 1867 - 1990
		Hydraulic mining involved aiming jets of water at a mountainside through nozzles.
		Hydraulic mining removed over one billion cubic meters of sediment from the foothills of the Sierra Nevada during the gold rush.
		Because of the devastation and damage caused by the influx of this debris to farms and towns downstream from the mining, hydraulic mining was banned in 1884.
	sfbay.wr.usgs.gov /sediment/suisunbay/mining.html (321 words)

	Welcome to Deer Creek School's "Our Town" Project - Mining - Hydraulic
		By 1866 an area of land near the town of North Bloomfield was purchased for hydraulic mining.
		After many years the hydraulic mines washed tons of dirt and silt into the creeks, rivers, and streams.
		It is believed that hydraulic mining was a selfish act because it caused so much damage to the environment.
	www.ncgold.com /goldrushtown/hydraulic.html (400 words)

	Types of Mining (Site not responding. Last check: 2007-10-13)
		Placer mining involves any type of mining where raw minerals are depostied in sand or gravel or on the surface and are picked up without having to drive, use dynamite or any other signifigant means.
		Hardrock mining entails diging into solid rock to fine minerals usually in their ore form (the metal plus oxygen).
		Mining operations of this scale were not done too often in the 19th century.
	www.frontiertrails.com /oldwest/typesmining.html (324 words)

	Placer mining Summary
		A fourth method of mining is used with deposits underwater, as in a lake or along the seashore.
		Placer mining (pronounced "plass-er") is an open-pit or open-cast form of mining by which certain valuable minerals are extracted from the surface of the earth without tunneling.
		In California, from 1853 to 1884, placer mining removed an enormous amount of material from the mountainsides that was carried downstream and raised the level of the Central Valley by some seven feet in some areas, and settled in a huge layer at the bottom of San Francisco Bay.
	www.bookrags.com /Placer_mining (1250 words)

	Mining Review Africa - Issue 1 2003
		The 82-million tonne stockpile, mined by PMC over a period of many years during the course of its open pit mining operations, will now be drawn on by Foskor to supplement its own production.
		The new hydraulic shovel is the ideal loading tool for these dump trucks as they are loaded in three to four pass cycles.
		All the mining equipment deployed at the Orapa/Letlhakane mines are diesel-powered due to the absence of electrical power supply into the pits at these operations.
	www.miningreview.com /archive/031/08_1.htm (1025 words)

	Mining Technology - WT Hydraulics - Hydraulic Systems, Hydraulic Components, Hydraulic Circuits and Hydraulic Repairs (Site not responding. Last check: 2007-10-13)
		Established in 1996, WT Hydraulics remains focused on the mining sector of the Goldfields of Western Australia — the hub of gold and nickel mining in Australia.
		The hydraulic circuits provided by WT Hydraulics are well accepted by the industry and gained goodwill for the company.
		In December 1999, WT Hydraulics won the contract to supply hydraulic hose and fittings to Bymecut Mining.
	www.mining-technology.com /contractors/hydraulics/wt (510 words)

	Rabbit Creek Journal
		Hydraulic mining was carried on without a thought to the ultimate disposition of the tons of mining waste material it created.
		Mining entities didn’t care what happened to all that dirt, rock rubble, and muddy silt that was created as long as it didn’t get in the way of gold mining.
		Gold mining was one of the most important industries west of the Rocky Mountains and was the first major industrial-corporate industries in California.
	www.rcj.net /englebright6.htm (971 words)

	Hope Mining
		The Resurrection Creek Valley is an historic mining district; the first recorded discovery of gold was in 1888 and some historians believe that the Russians mined the area even before that date.
		By 1900, thousands of people occupied a thriving mining community in the Hope area, which was one of the principal mining camps in the state before the more widely known gold rushes in the Klondike and the Nome area drew the more foot-loose of the Hope miners away.
		Hydraulic mining utilizes large, high-pressure water nozzles to move and wash the placer deposits and to stack the tailings.
	www.hopemining.com /reserves.html (1629 words)

	Gold Mining series - Bowie
		Hydraulic mining used jets of water to break down gravel banks and to wash the gold-laden soil, sand, gravel, and cobble through gold-separating devices (sluices and under-currents).
		It was first published in 1885, just a year after the collapse of this premier gold mining sector, and at a time when the industry hoped to revive itself by lobbying, or by building dams to control mining debris.
		He describes the use of mercury and other mining practices that made hydraulicking pay at "an ounce of gold per ton of gravel." And he tells of the long hard-rock tunnels that were required to drain the pits and to house the sluices and undercurrents that caught the gold.
	www.sharinghistory.com /GOB.htm (389 words)

	LearnCalifornia.org - Hydraulic Mining Online Lesson
		Hydraulic mining became the most efficient and most used mining method until 1884 when a court case brought by farmers and valley cities curtailed the practice.
		It would be helpful if the group explaining hydraulic mining was the first to testify.
		Students could write about the benefits of hydraulic mining for California and the nation (gold to treasury and water for irrigation and water supplies for the towns.)
	www.learncalifornia.org /doc.asp?id=411 (501 words)

	Hydraulic mining (Site not responding. Last check: 2007-10-13)
		Hydraulic mining was a form of mining that was very profitable.
		You can see the results of hydraulic mining in Columbia across from the Wells Fargo building where there are many oddly shaped limestone formations.
		Hydraulic mining would wash away tons of dirt to get at the gold inside the earth.
	imet.csus.edu /imet3/odell/gold_rush/hydraulic.html (144 words)

	"Pale Rider" by Joseph K. Heumann and Robin L. Murray
		His detailed description of this mining technique engineered around 1850 is juxtaposed with images of falling trees and soil devastated by the water shooting out of monitors, the water cannons used to strip the hills of topsoil and growth to make the gold beneath easier to find.
		Huie oversees a park in the Sierra Nevada mountain range where the topography wears the mark of hydraulic mining from the 1850s to the 1880s, a mining technique so effective it was used in areas all over the western United States.
		It seems self-evident, then, that hydraulic mining hurt not only the environment—the mountains bared by water—but also the economic welfare of those flooded out by the dammed rivers and streams.
	www.ejumpcut.org /archive/jc47.2005/palerider/index.html (1230 words)

	Who Owns The West? Mining Claims in America's West
		Mono Lake Hydraulic Mining Co is one of 92,125 beneficiaries of a 132-year-old federal mining law that gives away precious metals, minerals, and even the title to the land itself for less than $10 an acre.
		Mono Lake Hydraulic Mining Co is one of 63,768 beneficiaries of a long-standing federal subsidy called "patenting" that allows mining interests to purchase public land for no more than $5 an acre.
		Since acquiring title to the land, Mono Lake Hydraulic Mining Co may have mined it, sold it, leased it, or passed it on to heirs or other corporate interests.
	www.ewg.org /mining/owners/overview.php?cust_id=1088952 (413 words)

	Welcome to Deer Creek School's "Our Town" Project - Mining
		Placer mining was one of the earliest mining methods discovered by the miners.
		This type of mining used manual techniques and tools such as sluice boxes, pans, and rockers located near rivers and streams.
		Hydraulic mining was the most destructive type, leaving the land unusable as a result.
	www.ncgold.com /goldrushtown/mining.html (171 words)

Try your search on: Qwika (all wikis)