• United States Gold Mining Claim - Arizona - 2017

    The United States mine is located just outside of Cottonwood, Arizona, in the North Verde Mining District. The mine was worked as an open pit, therfore there are no underground workings. The mine has an extensive history of production and a massive amount of work was done at the site. Historically, the United States mine was worked for gold, copper, and silver, and the entire area is littered with copper ore. The ores are rich and in good supply, but will need to be processed in bulk to be profitable.

    published: 26 May 2017
  • Mining in the USA:" United States: A Ten Talent Nation" 1922 American Motion Picture Corp.

    more at http://scitech.quickfound.net Good overview of mining and mineral resources in the US as of 1922, with many nice film clips and lots of statistics. Public domain film from the Prelinger Archives, slightly cropped to remove uneven edges, with the aspect ratio corrected, and mild video noise reduction applied. The film was silent. I have added music created by myself using the Reaper Digital Audio Workstation and the Independence and Proteus VX VST instrument plugins. http://creativecommons.org/licenses/by-sa/3.0/ http://en.wikipedia.org/wiki/Mining Mining is the extraction of valuable minerals or other geological materials from the earth from an orebody, lode, vein, seam, or reef, which forms the mineralized package of economic interest to the miner. Ores recovered by mining i...

    published: 18 Nov 2013
  • How Is Uranium Mining Conducted in the United States?

    Uranium Resources' Mark Pelizza explains how uranium is mined--either through a conventional or in situ uranium mining process--to provide fuel for U.S. nuclear energy facilities. He also discusses where the uranium comes from that is used to power U.S. nuclear plants. For more information on uranium mining, see NEI's website: http://www.nei.org/howitworks/nuclearpowerplantfuel/.

    published: 10 Jul 2012
  • Coal Mining: The Dangerous Job on EARTH - DOCFILMS

    Coal Mining: The Dangerous Job on EARTH - DOCFILMS The objective of coal mining is to obtain coal from the ground. Coal is valued for its power material, and, given that the 1880s, has actually been extensively made use of to produce electricity. Steel and also cement industries utilize coal as a gas for removal of iron from iron ore and for cement manufacturing. In the United States, United Kingdom, as well as South Africa, a coal mine and also its structures are a colliery. In Australia, "colliery" normally refers to an underground coal mine. Coal mining has had several developments over the recent years, from the very early days of males tunneling, excavating and by hand extracting the coal on carts to huge open cut and long wall surface mines. Mining at this scale needs the use of dr...

    published: 06 Aug 2015
  • A look inside America's largest Bitcoin mining operation

    Start mining Bitcoin today: https://pool.bitcoin.com/index.html?code=xNF8r7 Video: Inside America’s largest Bitcoin mining operation http://bitshare.cm/news/inside-americas-largest-bitcoin-mining-operation/

    published: 10 Mar 2014
  • Visit Dragon Mine USA! A REAL Ethereum & Bitcoin Mining Facility!

    Visit Dragon Mine USA! A REAL Ethereum & Bitcoin Mining Facility! Andrew, one of our leaders from South-Africa, visits the dragon mine in the USA on an undisclosed location. The location can not be revealed for safety reasons. Many of my collegues visited this mine, as you can see it is 100% real and bitcoin and other cryptocurrencies are being mined here continuously. Don't get scammed and mine your own bitcoins with a REAl bitcoin mining company! Start mining your own cryptocurrencies from as little as $25 up to $500http://start.dragonminingsystems.com/ If you found this video valuable, give it a like. If you know someone who needs to see it, share it. Leave a comment below with your thoughts. Add it to a playlist if you want to watch it later. Click here to subscribe: ➤https://www...

    published: 17 Jan 2017
  • MOST Mysterious Ghost Towns in the US

    From abandoned mining towns with no more gold, to haunted places, here are 10 Mysterious Ghost towns in the US GET TO DYNAMITE TV AND SUBSCRIBE ! https://www.youtube.com/channel/UCJf35rv_-9uZiXjOi51t3JQ Subscribe to American Eye http://goo.gl/GBphkv 5. Thurmond West Virginia Once a thriving center of Coal mining in West Virginia, Thurmond was a prosperous place of commerce and businesses along the Ohio Railway. It popped up in the 1880’s in the center of the state and consisted of popular hotels, casinos, banks, schools. It was a fairly well organized city with strict laws on drinking. In 1888 a rail station was built which allowed for tourism in the area and also to carry the coal out of the hills. The population reached a peak of 462 people 1930 but steady downfall would occur not t...

    published: 18 Jun 2017
  • Mining Gemstones with North America's most famous Gem miner...Frank Perham

    Frank Perham, a miner and mineral collector for over 45 years is one of the most renowned experts on Maine Pegmatites. His experience with granite pegmatite has lead to the success of the famous 1972 Tuesday Pocket at the Dunton Quarry in Newry, ME which a majority of some of best Maine tourmaline has been extracted from this pocket including massive green tourmaline crystals on display at the Smithsonian and Harvard Natural History museums. The other successes include the Harvard Quarry, Mt. Mica, and the Tamminen Quarry. A true rockhound legend! and I got to dig with him..woo-hoo!!

    published: 08 Jun 2010
  • Eye On Luminant: Safest Large Mining Operation in the United States

    Luminant’s mining employees are digging into the record books. The team recently achieved the lowest injury rate in the nation among the largest mining companies, according to a review of the 2015 MSHA Recordable Injury Rates. Learn more at http://ow.ly/JUhG300va59.

    published: 17 Mar 2016
  • Asia biggest Bitcoin & Ethereum mining company coming to the US!

    Bitconnect free account: https://goo.gl/7m4xRd "BITCCONNECT - Turn $100 to $250k" YouTube https://youtu.be/iUVZsh96ubs Capital release proof https://youtu.be/NPWZEe9aiYg USI TECH free account http://www.usiview.com/?ref=rocksolar8 Hashing24 best mining site: https://goo.gl/5QqYsy Get $10 worth of Bitcoin for when you set up your coinbase wallet http://goo.gl/EtDjEl Free Litecoin https://goo.gl/LDkr9q Use the code R8avSs and get 3% every time you purchase hashpower to mine Bitcoin and Ethereum and a ton of other Cryptocurrencies at https://www.genesis-mining.com 3% discount code: R8avSs My BTC address for donations: Bitcoin: 19CqQXd58TkeR9yGtoRtp5oVwc961ZLvXh BITCONNECT 8RkWB1hDsZiS4i9Eea6nrV2bfad3wLhRc3 NEO AaxzAxcTWj6pqcsSAP1mBcaKsuZciuZHkB Ethereum: 0x16F39bF8fAF7D4B5711...

    published: 30 Aug 2017
  • Modern Mining - How Eagle Mine produces nickel and copper

    This video will take you step-by-step through Eagle's mining process. In addition, the video explains the techniques we use to find nickel and copper. About us: Eagle Mine is a nickel-copper mine located in Michigan's Upper Peninsula. The underground mine is expected to produce 360 million pounds of nickel, 295 million pounds of copper and small amounts of other metals over its estimated eight year mine life. Eagle Mine is owned and operated by Lundin Mining Corporation.

    published: 19 Feb 2015
  • AMERICA REVEALED | Where Does Our Coal Come From? | PBS

    See the full episode at http://video.pbs.org/video/2226356267/ Did you know coal supplies nearly half of America's electricity? Visit Black Thunder Mine with Yul Kwon and discover how we mine this pivotal material. See more in the four-part AMERICA REVEALED, Wednesdays, April 11- May 2 at 10/9c on PBS.

    published: 24 Apr 2012
  • Diamond Mining in Arkansas: 12-Year-Old Finds 5.16-Carat Diamond at Arkansas' Crater of Diamonds

    Diamond found by Michael Dettlaff in Arkansas' Crater of Diamonds may be worth thousands of dollars. For more on this story, click here: http://abcnews.go.com/Entertainment/wireStory/55-carat-diamond-temporary-view-nyc-19651103

    published: 12 Aug 2013
  • Exploring Idaho's Abandoned Mines and Experiencing Totality During the Solar Eclipse

    While in Idaho exploring some abandoned mines, I found myself in the path of totality for the recent solar eclipse that swept across the United States. Enjoy this exploration and documentation of the small, abandoned Whitewater Mine as well as my footage of the stunning solar eclipse. See what I experienced as the moon's shadow swept over me and my campsite in a remote canyon far from any crowd.

    published: 25 Aug 2017
  • EXCLUSIVE: 1-ON-1 W/Keith Neumeyer: MY BIGGEST GOLD POSITION!

    Get Immediate Access To Our Full Report on First Mining Gold (TSX: FF& US: FFMGF) AT: https://www.wealthresearchgroup.com/Mineral/ https://www.wealthresearchgroup.com/gold2000/

    published: 18 Apr 2018
  • National Geographic - Gold mining in Alaska - Megastructure Documentary

    Gold mining in Alaska, a state of the United States, has been a major industry and impetus for exploration and settlement since a few years after the United States acquired the territory from Russia. Russian explorers discovered placer gold in the Kenai River in 1848, but no gold was produced. Gold mining started in 1870 from placers southeast of Juneau, Alaska. Gold is found and has been mined throughout Alaska; except in the vast swamps of the Yukon Flats, and along the North Slope between the Brooks Range and the Beaufort Sea. Areas near Fairbanks and Juneau, and Nome are responsible for most of Alaska's historical and all current gold production. Nearly all of the large and many of the small placer gold mines currently operating in the US are in Alaska.[2] Six modern large-scale hard ...

    published: 03 Jul 2017
  • 12 Biggest Mines

    These huge open-pits in the ground can either be called mines or quarry and they give us amazing things like gold, silver, and copper! Subscribe to Talltanic http://goo.gl/wgfvrr 7. The Barrick Goldstrike Mine Owned and operated by Barrick Gold, which is the largest gold mining company, the goldstrike mine happens to be the largest gold mine in all of North America. Located in Eureka County, Nevada, the goldstrike mine is comprised of 3 different mines, the larger of the three is the Betze-Post open-pit mine, the Meikle, and the Rodeo, both of which are found underground. This complex of mines is also the largest Carlin-type mine in the world. First opened way back in 1986, the mine not only produces gold but silver as well, which just so happens to be where Nevada gets its famous nickna...

    published: 03 Oct 2016
  • American Gold Rush History Documentary

    The first significant gold rush in the United States was in Cabarrus County, North Carolina (east of Charlotte), in 1799 at today's Reed's Gold Mine. Thirty years later, in 1829, the Georgia Gold Rush in the southern Appalachians occurred. It was followed by the California Gold Rush of 1848–55 in the Sierra Nevada, which captured the popular imagination.

    published: 22 Dec 2014
  • Gold Mining in South Dakota | Largest Gold Mine in North America | Documentary | 1940 HD NATURAL 201

    HD NATURAL 2016 2016 My channel: ▻SUBSCRIBE: ▻Facebook: . The first significant gold rush in the United States was in Cabarrus County, North Carolina (east of Charlotte), in 1799 at today's Reed's Gold Mine. Thirty years . You can follow Alex Stanczyk on Twitter @alexstanczyk You can follow Jim Rickards on Twitter @JamesGRickards You can listen to the Gold Chronicles on . GOLD is a chemical element with the symbol Au and atomic number 79. It is a dense, soft, malleable, and ductile metal with a bright yellow color and luster that .

    published: 01 Nov 2016
  • The History of Silver Mines documentary

    Used in technology, photography, and decorative arts, silver is one of the most versatile metals known to man. In this episode of Modern Marvels we'll explore the methods, men and machines that extract this precious resource from the earth. In Northern Idaho's Lucky Friday mine, workers toil more than a mile underground in an around-the-clock cycle of blasting and hauling silver laden rock. While in the wilds of northern Nevada, large machines and even larger ore loads make the vast Rochester open pit mine one of the most productive silver mines in the United States. Both these facilities owe their methods to the silver strike that started it all: Nevada's famous Comstock Lode of the mid 19th Century. From some of the largest steam engines ever built, to robotic mining machines that work w...

    published: 25 Aug 2017
  • Minnesota Iron Mining Process

    published: 06 Jun 2016
  • How Copper is Mined and Refined: A Story Of Copper 1951 US Bureau of Mines

    more at http://scitech.quickfound.net/geology_news_and_links.html "Tells the story of the mining and manufacture of copper from the crude ore to the finished product. lots of footage of giant machines, some blasting." Public domain film, slightly cropped to remove uneven edges, with the aspect ratio corrected, and mild video noise reduction applied. The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original). http://creativecommons.org/licenses/by-sa/3.0/ https://en.wikipedia.org/wiki/Copper_extraction_techniques Copper extraction techniques refers to the methods for obtaining copper from its ores. The conversion of copper consists of a series of che...

    published: 07 Aug 2015
  • Sago Mine Disaster

    Thirteen men sat in the best barricade they could build, enduring...hoping. They had used their single hour of oxygen from the only Self Contained Self Rescuer issued to them by the company. Their families waited outside living through one of the most difficult times of their lives, praying to see their loved ones once again. As time wore on, we would learn the ultimate fate of those men, those husbands, those fathers, those grandfathers, brothers, uncles, nephews. One was alive, barely holding on…the others had perished in the thick poisoned air of the mine. The miners of Sago were like so many of us. They took one of the few jobs available to them, jobs that would allow them to live in the places they had long called home, jobs that would pay enough to support their families. If only ...

    published: 04 Jan 2015
  • Canary used for testing for carbon monoxide 1926 US Bureau of Mines

    In the early part of the 20th century, miners in Great Britain and the United States took caged canaries into coalmines in order to provide warning of the presence of toxic gases including carbon monoxide and methane. Canaries would visibly show distress and sway on their perches in the presence low concentrations of carbon monoxide before toppling over. The concept of the "canary in the coal mine" giving warning of a human health hazard is based on several principles. First, canaries were found to be more sensitive than both humans and other animals such as mice to the toxic effects of carbon monoxide. Second, the birds were allowed to share the same air exposures as the humans. Third, the occurrence of carbon monoxide poisoning in a bird was quite recognizable to the miners, since sick...

    published: 07 Nov 2012
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United States Gold Mining Claim - Arizona - 2017
3:49

United States Gold Mining Claim - Arizona - 2017

  • Order:
  • Duration: 3:49
  • Updated: 26 May 2017
  • views: 941
videos
The United States mine is located just outside of Cottonwood, Arizona, in the North Verde Mining District. The mine was worked as an open pit, therfore there are no underground workings. The mine has an extensive history of production and a massive amount of work was done at the site. Historically, the United States mine was worked for gold, copper, and silver, and the entire area is littered with copper ore. The ores are rich and in good supply, but will need to be processed in bulk to be profitable.
https://wn.com/United_States_Gold_Mining_Claim_Arizona_2017
Mining in the USA:" United States: A Ten Talent Nation" 1922 American Motion Picture Corp.
13:23

Mining in the USA:" United States: A Ten Talent Nation" 1922 American Motion Picture Corp.

  • Order:
  • Duration: 13:23
  • Updated: 18 Nov 2013
  • views: 2204
videos
more at http://scitech.quickfound.net Good overview of mining and mineral resources in the US as of 1922, with many nice film clips and lots of statistics. Public domain film from the Prelinger Archives, slightly cropped to remove uneven edges, with the aspect ratio corrected, and mild video noise reduction applied. The film was silent. I have added music created by myself using the Reaper Digital Audio Workstation and the Independence and Proteus VX VST instrument plugins. http://creativecommons.org/licenses/by-sa/3.0/ http://en.wikipedia.org/wiki/Mining Mining is the extraction of valuable minerals or other geological materials from the earth from an orebody, lode, vein, seam, or reef, which forms the mineralized package of economic interest to the miner. Ores recovered by mining include metals, coal and oil shale, gemstones, limestone, and dimension stone, rock salt and potash, gravel, and clay. Mining is required to obtain any material that cannot be grown through agricultural processes, or created artificially in a laboratory or factory. Mining in a wider sense includes extraction of any non-renewable resource such as petroleum, natural gas, or even water. Mining of stone and metal has been done since pre-historic times. Modern mining processes involve prospecting for ore bodies, analysis of the profit potential of a proposed mine, extraction of the desired materials, and final reclamation of the land after the mine is closed. The nature of mining processes creates a potential negative impact on the environment both during the mining operations and for years after the mine is closed. This impact has led to most of the world's nations adopting regulations to moderate the negative effects of mining operations. Safety has long been a concern as well, and modern practices have improved safety in mines significantly... Mining in the United States became prevalent in the 19th century, and the General Mining Act of 1872 was passed to encourage mining of federal lands. As with the California Gold Rush in the mid 19th century, mining for minerals and precious metals, along with ranching, was a driving factor in the Westward Expansion to the Pacific coast. With the exploration of the West, mining camps were established and "expressed a distinctive spirit, an enduring legacy to the new nation;" Gold Rushers would experience the same problems as the Land Rushers of the transient West that preceded them. Aided by railroads, many traveled West for work opportunities in mining. Western cities such as Denver and Sacramento originated as mining towns. As new areas were explored, it was usually the gold (placer and then load) and then silver that were taken first, with other metals often waiting for railroads or canals. Coarse gold dust and nuggets do not require smelting, is easy to identify and is easily transported. Modern period In the early 20th century, the gold and silver rush to the western United States also stimulated mining for base metals such as copper, lead, and iron as well as coal. Areas in modern Montana, Utah, Arizona, and later Alaska became predominate suppliers of copper to the world, which was increasingly demanding copper for electrical and households goods. Canada's mining industry grew more slowly than the United States due to limitations in transportation, capital, and U.S. competition; Ontario was the major producer of the early 20th century with nickel, copper, and gold. Meanwhile, Australia experienced the Australian gold rushes and by the 1850s was producing 40% of the world's gold, followed by the establishment of large mines such as the Mount Morgan Mine, which ran for nearly a hundred years, Broken Hill ore deposit (one of the largest zinc-lead ore deposits), and iron ore mines at Iron Knob. After declines in production, another boom in mining occurred in the 1960s and in the 21st century Australia remains a major world mineral producer. Into the 21st century, a globalized mining industry of large multinational corporations has arisen. Peak minerals and environmental impacts have also become a concern. Different elements, particularly rare earth minerals, have begun to increase in demand as a result of new technologies...
https://wn.com/Mining_In_The_USA_United_States_A_Ten_Talent_Nation_1922_American_Motion_Picture_Corp.
How Is Uranium Mining Conducted in the United States?
4:49

How Is Uranium Mining Conducted in the United States?

  • Order:
  • Duration: 4:49
  • Updated: 10 Jul 2012
  • views: 107472
videos
Uranium Resources' Mark Pelizza explains how uranium is mined--either through a conventional or in situ uranium mining process--to provide fuel for U.S. nuclear energy facilities. He also discusses where the uranium comes from that is used to power U.S. nuclear plants. For more information on uranium mining, see NEI's website: http://www.nei.org/howitworks/nuclearpowerplantfuel/.
https://wn.com/How_Is_Uranium_Mining_Conducted_In_The_United_States
Coal Mining: The Dangerous Job on EARTH - DOCFILMS
43:21

Coal Mining: The Dangerous Job on EARTH - DOCFILMS

  • Order:
  • Duration: 43:21
  • Updated: 06 Aug 2015
  • views: 380592
videos
Coal Mining: The Dangerous Job on EARTH - DOCFILMS The objective of coal mining is to obtain coal from the ground. Coal is valued for its power material, and, given that the 1880s, has actually been extensively made use of to produce electricity. Steel and also cement industries utilize coal as a gas for removal of iron from iron ore and for cement manufacturing. In the United States, United Kingdom, as well as South Africa, a coal mine and also its structures are a colliery. In Australia, "colliery" normally refers to an underground coal mine. Coal mining has had several developments over the recent years, from the very early days of males tunneling, excavating and by hand extracting the coal on carts to huge open cut and long wall surface mines. Mining at this scale needs the use of draglines, vehicles, conveyors, jacks and shearers. Check our Channel https://www.youtube.com/channel/UCd8wsuBa96synSLc5Mk6Whg More DOCFILMS THEDOCFILMS.blogspot.com
https://wn.com/Coal_Mining_The_Dangerous_Job_On_Earth_Docfilms
A look inside America's largest Bitcoin mining operation
1:38

A look inside America's largest Bitcoin mining operation

  • Order:
  • Duration: 1:38
  • Updated: 10 Mar 2014
  • views: 892189
videos
Start mining Bitcoin today: https://pool.bitcoin.com/index.html?code=xNF8r7 Video: Inside America’s largest Bitcoin mining operation http://bitshare.cm/news/inside-americas-largest-bitcoin-mining-operation/
https://wn.com/A_Look_Inside_America's_Largest_Bitcoin_Mining_Operation
Visit Dragon Mine USA! A REAL Ethereum & Bitcoin Mining Facility!
2:15

Visit Dragon Mine USA! A REAL Ethereum & Bitcoin Mining Facility!

  • Order:
  • Duration: 2:15
  • Updated: 17 Jan 2017
  • views: 17434
videos
Visit Dragon Mine USA! A REAL Ethereum & Bitcoin Mining Facility! Andrew, one of our leaders from South-Africa, visits the dragon mine in the USA on an undisclosed location. The location can not be revealed for safety reasons. Many of my collegues visited this mine, as you can see it is 100% real and bitcoin and other cryptocurrencies are being mined here continuously. Don't get scammed and mine your own bitcoins with a REAl bitcoin mining company! Start mining your own cryptocurrencies from as little as $25 up to $500http://start.dragonminingsystems.com/ If you found this video valuable, give it a like. If you know someone who needs to see it, share it. Leave a comment below with your thoughts. Add it to a playlist if you want to watch it later. Click here to subscribe: ➤https://www.youtube.com/c/cryptominingchannel?sub_confirmation=1 Why should you mine with Galaxy mine? ↪ bit.ly/WhyYouShouldMineWithGalaxyMine ✓ We are the safest and most generous bitcoin mine in the world. ✓ Best price value for money in terms of GH/s ✓No electricity costs ✓ Galaxy mine makes bitcoin mining as wel as multimining (zcash, ethereum, expanse and soon monero) available for everyone ✓ We use the latest mining equipment to produce bitcoins and other cryptocurrencies, therefore our output is higher than other miners ✓ Advanced Galaxy multimining technology (GPU Multi-Cryptocurrency Mining): Mine multiple coins with your GPU hardware equipment ✓You do not have to worry that your equipment crashes, overheats, goes outdated or has to be reconfigured – Galaxy Mine takes care of everything ✓No Pool- or Cloudmining, YOU own the equipment ✓ Our number one goal is to be the most trusted and reliable bitcoin mine in the world ✓ The founder of the company, David Martin, has a strong proven record of integrity, honesty and a shared vision of helping others, Galaxy Mine will be around for a long time and is here to stay! The mining contracts last for 3 years. You can repurchase (compound) your earnings from 35% - 100% daily. After 3 years the original GH/s of your contract expires, but with the accumulated extra GH/s you keep on mining bitcoins as long as it is profitable! *You can register through invitation ONLY, the field "Username of sponsor" must be filled in with "start" so you can enter and start mining!* Payments have to be done in bitcoin so you need a bitcoin wallet, it's free (http://www.xapo.com). Choose to mine bitcoins or multimining ➙ select the mining contract of your choice ➙ pay with bitcoin ➙ Galaxy Mine buys the hardware from the manufacturer ➙ after 12 days your hardware is installed in our bitcoin mine and you start mining ↪ All Playlists: ➤http://bit.ly/GalaxyMine ➤bit.ly/VisitGalaxyMine ➤bit.ly/MonthlyMiningProfits ➤bit.ly/BitcoinAndCryptoMining ➤bit.ly/AllYouNeedToKnowAboutBitcoin ➤ bit.ly/ValueClubMemberContent ➤bit.ly/ChallengeDragonGames ➤bit.ly/HowToMakeMoneyPlayingGames
https://wn.com/Visit_Dragon_Mine_USA_A_Real_Ethereum_Bitcoin_Mining_Facility
MOST Mysterious Ghost Towns in the US
10:53

MOST Mysterious Ghost Towns in the US

  • Order:
  • Duration: 10:53
  • Updated: 18 Jun 2017
  • views: 297725
videos
From abandoned mining towns with no more gold, to haunted places, here are 10 Mysterious Ghost towns in the US GET TO DYNAMITE TV AND SUBSCRIBE ! https://www.youtube.com/channel/UCJf35rv_-9uZiXjOi51t3JQ Subscribe to American Eye http://goo.gl/GBphkv 5. Thurmond West Virginia Once a thriving center of Coal mining in West Virginia, Thurmond was a prosperous place of commerce and businesses along the Ohio Railway. It popped up in the 1880’s in the center of the state and consisted of popular hotels, casinos, banks, schools. It was a fairly well organized city with strict laws on drinking. In 1888 a rail station was built which allowed for tourism in the area and also to carry the coal out of the hills. The population reached a peak of 462 people 1930 but steady downfall would occur not too long after. A popular hotel was burnt to the ground which which had startled much of the population and would finally reach 0 in the year 2000. You can see the contrast between the cities built out in the west and out in the east during this time. There was much more technological advancements and the addition of coal to a city at this period of time would allow them to heat their homes. Surprisingly the city hasn’t received too many vandals and much of it’s past is preserved. 4. Salton Sea Gallons of water were sent gushing into a dry lake bed after a storm caused an irrigation canal to flood and break in the Colorado River. So the Salton Sea is basically lucky to exist in that sense. A resort town was built near this body of water, which became a popular location for boating. Many people once flocked here to soak up the sun, go jet skiing and drive fancy yachts in the booming 50’s and 60’s. Stars like the Beach Boys and Bono would encore this lake, right in the heart of California’s desert. It’s probably now the last place you’d want to go on vacation unless you enjoy putrid odors and some of those boats are left abandoned on this decaying lake.. Not all good things last forever and this place quickly turned into an ecological nightmare due to pesticides and fertilizers from nearby farms and the irrigation system. It’s seen as one of California’s biggest environmental blunders of all time It became much too polluted to sustain life even for fish. The inhabitants quickly fled once the smell of the water became unbearable. To this day, dead fish litter the once popular beaches, leaving a rotten egg like smell that would be enough to scare off any urban explorer and it’s certainly not good for tourism. The size of the lake continues to shrink even in 2017 and the smell of rotting fish will continue to get worse. 3. St Elmo Colorado Don’t forget the rockie mountains also have their fair share of gold as well. And where there was once gold, there are abandoned towns.This places is located in the Sawatch Mountains and features well-preserved wooden buildings from the 1880’s after the gold and silver mines sprung up. The town had a general store, a town hall, 5 hotels, dancing halls and saloons during it’s peak around the 1890’s the resources were mined and not much else was left, the railroad was closed so no one kept on coming here. Some residents seemed to stay until 1952 when the postal service was cut off. If you don’t mind high elevation at 9,961 feet, this might be an enjoyable place to visit and it’s our ghost town with the highest elevation on this list.. It’s also one of Colorado’s maintained ghost towns. 2. Virginia City, Nevada Virginia city grew quickly in the 1850’s and 60’s after the huge discovery of the comstock lode which was a major silver deposit in the sierra nevada mountains,. But once the silver was gone, everyone fled the city. You can actually explore one of our most mysterious ghost towns in the US on google maps. Check out the entire well preserved ghost town of Virginia City, which is also rumored to be one of the most haunted places in the US. Besides some of the modern day vehicles, this place is exactly the way it was over 100 years ago and it’s the most haunted place in Nevada. Some ghost towns are quite as accessible on google maps, and this is one of the more detailed ones we were able to find. Ignore the motorcycles and get a good feel for how historic site would have looked, when miners were sifting the the hills in search of gold. Drop into the Silver Terrace cemetery for a creepy flash from the past!
https://wn.com/Most_Mysterious_Ghost_Towns_In_The_US
Mining Gemstones with North America's most famous Gem miner...Frank Perham
5:23

Mining Gemstones with North America's most famous Gem miner...Frank Perham

  • Order:
  • Duration: 5:23
  • Updated: 08 Jun 2010
  • views: 205743
videos
Frank Perham, a miner and mineral collector for over 45 years is one of the most renowned experts on Maine Pegmatites. His experience with granite pegmatite has lead to the success of the famous 1972 Tuesday Pocket at the Dunton Quarry in Newry, ME which a majority of some of best Maine tourmaline has been extracted from this pocket including massive green tourmaline crystals on display at the Smithsonian and Harvard Natural History museums. The other successes include the Harvard Quarry, Mt. Mica, and the Tamminen Quarry. A true rockhound legend! and I got to dig with him..woo-hoo!!
https://wn.com/Mining_Gemstones_With_North_America's_Most_Famous_Gem_Miner...Frank_Perham
Eye On Luminant: Safest Large Mining Operation in the United States
4:06

Eye On Luminant: Safest Large Mining Operation in the United States

  • Order:
  • Duration: 4:06
  • Updated: 17 Mar 2016
  • views: 1343
videos
Luminant’s mining employees are digging into the record books. The team recently achieved the lowest injury rate in the nation among the largest mining companies, according to a review of the 2015 MSHA Recordable Injury Rates. Learn more at http://ow.ly/JUhG300va59.
https://wn.com/Eye_On_Luminant_Safest_Large_Mining_Operation_In_The_United_States
Asia biggest Bitcoin & Ethereum mining company coming to the US!
2:40

Asia biggest Bitcoin & Ethereum mining company coming to the US!

  • Order:
  • Duration: 2:40
  • Updated: 30 Aug 2017
  • views: 41820
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Bitconnect free account: https://goo.gl/7m4xRd "BITCCONNECT - Turn $100 to $250k" YouTube https://youtu.be/iUVZsh96ubs Capital release proof https://youtu.be/NPWZEe9aiYg USI TECH free account http://www.usiview.com/?ref=rocksolar8 Hashing24 best mining site: https://goo.gl/5QqYsy Get $10 worth of Bitcoin for when you set up your coinbase wallet http://goo.gl/EtDjEl Free Litecoin https://goo.gl/LDkr9q Use the code R8avSs and get 3% every time you purchase hashpower to mine Bitcoin and Ethereum and a ton of other Cryptocurrencies at https://www.genesis-mining.com 3% discount code: R8avSs My BTC address for donations: Bitcoin: 19CqQXd58TkeR9yGtoRtp5oVwc961ZLvXh BITCONNECT 8RkWB1hDsZiS4i9Eea6nrV2bfad3wLhRc3 NEO AaxzAxcTWj6pqcsSAP1mBcaKsuZciuZHkB Ethereum: 0x16F39bF8fAF7D4B5711d78A2be73d567669478E9 Litecoin: LXH6A6qEuSCZPsBLEzREQXDmUE13CvaV6K Connect with me on steem: https://steemit.com/@rocksolar bitcoin Bitcoin cash Bitcoin atm bitcoin wallet bitcoin mining Bitconnect Bitconnect lending Bitconnect mining Bitconnect scam Bitconnect ponzi Coinbase crypto cryptocurrency cypto wallet cryptocurrency wallet crypto currency mining ethereum ethereum mining buy bitcoin bitcoins Bitcoin cash top bitcoin bitcoin site bitcoin sites doge coin coins blockchain blockchains blockchain mining bitcoin price litecoin monero auger maidsafe maidsafecoin steem steemit factom lisk coinbase genesis mining cloud mining ethereum classic ripple Irs Bitcoin crash Ethereum crash High school dropout NBA draft Lonzo Ball Prodigy Mob Deep Facts Mark Cuban Capitol hill Government Microsoft Summer league Kardashian Jay Z Janet Yellen Bitcoin crashed Pump and dump Master nod Firesale game of thrones hbo Zion Williamson Blockchain Ron Paul Donald Trump Goldman Sachs group Inc Arirang News Asian Markets Asian Crypto marketing best free bitcoin mining best free bitcoin mining pool best free bitcoin mining software bitcoin cloud mining free trial bitcoin mining free electricity bitcoin mining free heating bitcoin mining free money bitcoin mining hack free download bitcoin mining software free download bitcoin mining with free electricity free bitcoin cloud mining bitzfree free bitcoin cloud mining sites free bitcoin cloud mining software free bitcoin mining free bitcoin mining 2015 free bitcoin mining 2016 free bitcoin mining 2017 free bitcoin mining android free bitcoin mining apk free bitcoin mining app free bitcoin mining bot free bitcoin mining cloud free bitcoin mining contract free bitcoin mining fast free bitcoin mining faucet free bitcoin mining for android free bitcoin mining free free bitcoin mining game free bitcoin mining game (earn real bitcoin) free bitcoin mining generator free bitcoin mining hack free bitcoin mining hardware free bitcoin mining india free bitcoin mining legit free bitcoin mining mac free bitcoin mining no deposit free bitcoin mining no investment free bitcoin mining online free bitcoin mining online 2017 free bitcoin mining pc free bitcoin mining philippines free bitcoin mining pool free bitcoin mining pool url free bitcoin mining power free bitcoin mining program free bitcoin mining reddit free bitcoin mining rig free bitcoin mining robot free bitcoin mining script free bitcoin mining server free bitcoin mining sites free bitcoin mining sites 2017 free bitcoin mining sites list free bitcoin mining sites without investment free bitcoin mining software free bitcoin mining software for android free bitcoin mining software for windows free bitcoin mining software mac free bitcoin mining software windows free bitcoin mining software windows 10 free bitcoin mining software windows 7 free bitcoin mining tools free bitcoin mining trial free bitcoin mining trusted free bitcoin mining tutorial free bitcoin mining vps free bitcoin mining websites free bitcoin mining without investment free energy bitcoin mining free ghs bitcoin mining free power for bitcoin mining free vps for bitcoin mining how to mining bitcoin free *Copyright Disclaimer Under Section 107 of the Copyright Act 1976, allowance is made for "fair use" for purposes such as criticism, comment, news reporting, teaching, scholarship, and research. Fair use is a use permitted by copyright statute that might otherwise be infringing. Non-profit, educational or personal use tips the balance in favor of fair use. No copyright infringement intended.ALL RIGHTS BELONG TO THEIR RESPECTIVE OWNERS*
https://wn.com/Asia_Biggest_Bitcoin_Ethereum_Mining_Company_Coming_To_The_US
Modern Mining - How Eagle Mine produces nickel and copper
5:44

Modern Mining - How Eagle Mine produces nickel and copper

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  • Duration: 5:44
  • Updated: 19 Feb 2015
  • views: 56173
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This video will take you step-by-step through Eagle's mining process. In addition, the video explains the techniques we use to find nickel and copper. About us: Eagle Mine is a nickel-copper mine located in Michigan's Upper Peninsula. The underground mine is expected to produce 360 million pounds of nickel, 295 million pounds of copper and small amounts of other metals over its estimated eight year mine life. Eagle Mine is owned and operated by Lundin Mining Corporation.
https://wn.com/Modern_Mining_How_Eagle_Mine_Produces_Nickel_And_Copper
AMERICA REVEALED | Where Does Our Coal Come From? | PBS
6:44

AMERICA REVEALED | Where Does Our Coal Come From? | PBS

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  • Duration: 6:44
  • Updated: 24 Apr 2012
  • views: 69809
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See the full episode at http://video.pbs.org/video/2226356267/ Did you know coal supplies nearly half of America's electricity? Visit Black Thunder Mine with Yul Kwon and discover how we mine this pivotal material. See more in the four-part AMERICA REVEALED, Wednesdays, April 11- May 2 at 10/9c on PBS.
https://wn.com/America_Revealed_|_Where_Does_Our_Coal_Come_From_|_Pbs
Diamond Mining in Arkansas: 12-Year-Old Finds 5.16-Carat Diamond at Arkansas' Crater of Diamonds
1:50

Diamond Mining in Arkansas: 12-Year-Old Finds 5.16-Carat Diamond at Arkansas' Crater of Diamonds

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  • Duration: 1:50
  • Updated: 12 Aug 2013
  • views: 680330
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Diamond found by Michael Dettlaff in Arkansas' Crater of Diamonds may be worth thousands of dollars. For more on this story, click here: http://abcnews.go.com/Entertainment/wireStory/55-carat-diamond-temporary-view-nyc-19651103
https://wn.com/Diamond_Mining_In_Arkansas_12_Year_Old_Finds_5.16_Carat_Diamond_At_Arkansas'_Crater_Of_Diamonds
Exploring Idaho's Abandoned Mines and Experiencing Totality During the Solar Eclipse
8:50

Exploring Idaho's Abandoned Mines and Experiencing Totality During the Solar Eclipse

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  • Duration: 8:50
  • Updated: 25 Aug 2017
  • views: 43926
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While in Idaho exploring some abandoned mines, I found myself in the path of totality for the recent solar eclipse that swept across the United States. Enjoy this exploration and documentation of the small, abandoned Whitewater Mine as well as my footage of the stunning solar eclipse. See what I experienced as the moon's shadow swept over me and my campsite in a remote canyon far from any crowd.
https://wn.com/Exploring_Idaho's_Abandoned_Mines_And_Experiencing_Totality_During_The_Solar_Eclipse
EXCLUSIVE: 1-ON-1 W/Keith Neumeyer: MY BIGGEST GOLD POSITION!
26:09

EXCLUSIVE: 1-ON-1 W/Keith Neumeyer: MY BIGGEST GOLD POSITION!

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  • Duration: 26:09
  • Updated: 18 Apr 2018
  • views: 76
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Get Immediate Access To Our Full Report on First Mining Gold (TSX: FF& US: FFMGF) AT: https://www.wealthresearchgroup.com/Mineral/ https://www.wealthresearchgroup.com/gold2000/
https://wn.com/Exclusive_1_On_1_W_Keith_Neumeyer_My_Biggest_Gold_Position
National Geographic - Gold mining in Alaska - Megastructure Documentary
47:47

National Geographic - Gold mining in Alaska - Megastructure Documentary

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  • Duration: 47:47
  • Updated: 03 Jul 2017
  • views: 3788
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Gold mining in Alaska, a state of the United States, has been a major industry and impetus for exploration and settlement since a few years after the United States acquired the territory from Russia. Russian explorers discovered placer gold in the Kenai River in 1848, but no gold was produced. Gold mining started in 1870 from placers southeast of Juneau, Alaska. Gold is found and has been mined throughout Alaska; except in the vast swamps of the Yukon Flats, and along the North Slope between the Brooks Range and the Beaufort Sea. Areas near Fairbanks and Juneau, and Nome are responsible for most of Alaska's historical and all current gold production. Nearly all of the large and many of the small placer gold mines currently operating in the US are in Alaska.[2] Six modern large-scale hard rock mines operate in Alaska in 2008; four of those are gold-producing mines (an additional gold mine suspended production in late 2007). There are also some small-scale hard rock gold-mining operations. Alaska currently produces more gold (in 2015: 873,984 troy oz from hard rock mines, and 74,360 troy oz (five-year average) from placer deposits) than any state except Nevada.[3] In 2015, gold worth $1.01 billion accounted for 37% of the mining wealth produced in Alaska. Zinc and lead, mainly from the Red Dog mine, accounted for 53%; silver, mainly from the Greens Creek mine, accounted for 8.5%; and coal accounted for 1.5%. Alaska produced a total of 40.3 million troy ounces of gold from 1880 through the end of 2007
https://wn.com/National_Geographic_Gold_Mining_In_Alaska_Megastructure_Documentary
12 Biggest Mines
7:39

12 Biggest Mines

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  • Duration: 7:39
  • Updated: 03 Oct 2016
  • views: 423043
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These huge open-pits in the ground can either be called mines or quarry and they give us amazing things like gold, silver, and copper! Subscribe to Talltanic http://goo.gl/wgfvrr 7. The Barrick Goldstrike Mine Owned and operated by Barrick Gold, which is the largest gold mining company, the goldstrike mine happens to be the largest gold mine in all of North America. Located in Eureka County, Nevada, the goldstrike mine is comprised of 3 different mines, the larger of the three is the Betze-Post open-pit mine, the Meikle, and the Rodeo, both of which are found underground. This complex of mines is also the largest Carlin-type mine in the world. First opened way back in 1986, the mine not only produces gold but silver as well, which just so happens to be where Nevada gets its famous nickname, the “Silver State”, from. 6. The Oyu Tolgoi Mine The name for this combined open-pit mining project translates to Turquoise Hill and is located in the southern region of the Gobi Desert in Mongolia. The mines that are filled with gold-copper ore deposits are actually relatively new and were only recently discovered back in 2001 by the Canadian company Ivanhoe Mines. It’s expected that the mine will reach full capacity in the year 2021. It’s believed that this mine contains around 2,700,000 tons of copper and another 1.7 million ounces of gold. Like with all other mines, the environmental impact that the Oyu Tolgoi mine is often criticized since it is located in such a dry area and uses more than one billion gallons of water each month. 5. The Chuquicamata (choo-kee-kə-mah-tə) Mine In terms of volume, the chuquicamata mine, or the “Chuqui” mine as it’s more commonly known is the second deepest open-pit mine on the planet. This mine can be found in the northern area of Chile where its main export is that of copper. This has been the country’s main export and staple that is crucial to how the people of Chile rely on an income and it’s here that the metal is called “Chile’s salary” ever since they became dependent on the copper industry back when the first World War ended. Copper actually makes up about a third of all the country’s foreign trade but that 33 percent was once at a high percentage of 75% a few years earlier. 4. The Dionysos Marble Quarry This quarry lies on the Penteli Mountain in the town and municipality of Dionysos, Attica in Greece. It’s here that the world famous Dionysos pentelicon marble is extracted. The quarry has been opened for more than a 100 years and it was back in 1949 that it was owned by the Dionysos Marble Company. The quarry currently has 2 underground sites and 9 above ground sites where the marble is extracted. The marble here is protected by law and is solely used for the Acropolis Restoration Project and other ancient buildings in Athens. 3. The Udachnaya Pipe The name of this open-pit mine literally translates to lucky pipe and can be found right outside of the Arctic Circle in Sakha Republic, Russia. This mine was discovered way back in June of 1955 and is believed to contain around 225.8 million carats of diamonds with an estimated 10.4 million carats harvested annually. The diamond mine was taken over by the Russian diamond company Alrosa back in 2010. This is mine also happens to be the third deepest open-pit mine in the world at a depth of 1,970 feet. 2. The Mir Mine Occasionally called the Mirny Mine, this was once a former open-pit diamond mine that is located in Mirny, Eastern Siberia, Russia. This mine reaches a depth of 1,722 feet deep, along with a diameter of 3,900 feet making it one of the largest excavated holes to ever exist. The mine was first discovered back in June of 1955 by a group of three Soviet geologists. It proved to be rather difficult as it seemed like there was always one problem arising after another. The cold winter months provided harsh conditions that slowed production, the mine suffered a flood in the 90’s, and surface operations would cease in June of 2001 with underground operations still moving forward until the whole mine was permanently shut down in 2004. 1. The Bingham Canyon Mine Known by the locals at the Kennecott Copper Mine, the Bingham Canyon Mine is located in the southwest region of Salt Lake City, Utah, in the United States. This massive chasm is known for being the largest man-made excavation in all of the world. Owned by the Rio Tinto Group, the production of this mine was started an astonishing 110-years ago and since then the mine measures at being 2.5 miles long, 0.6 miles deep, and covers a distance of 1,900 acres. The mine endured a tremendous landslide back in 2013 and then a smaller one later that same year.
https://wn.com/12_Biggest_Mines
American Gold Rush History Documentary
1:53:44

American Gold Rush History Documentary

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  • Duration: 1:53:44
  • Updated: 22 Dec 2014
  • views: 128352
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The first significant gold rush in the United States was in Cabarrus County, North Carolina (east of Charlotte), in 1799 at today's Reed's Gold Mine. Thirty years later, in 1829, the Georgia Gold Rush in the southern Appalachians occurred. It was followed by the California Gold Rush of 1848–55 in the Sierra Nevada, which captured the popular imagination.
https://wn.com/American_Gold_Rush_History_Documentary
Gold Mining in South Dakota | Largest Gold Mine in North America | Documentary | 1940 HD NATURAL 201
1:10:58

Gold Mining in South Dakota | Largest Gold Mine in North America | Documentary | 1940 HD NATURAL 201

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  • Duration: 1:10:58
  • Updated: 01 Nov 2016
  • views: 753
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HD NATURAL 2016 2016 My channel: ▻SUBSCRIBE: ▻Facebook: . The first significant gold rush in the United States was in Cabarrus County, North Carolina (east of Charlotte), in 1799 at today's Reed's Gold Mine. Thirty years . You can follow Alex Stanczyk on Twitter @alexstanczyk You can follow Jim Rickards on Twitter @JamesGRickards You can listen to the Gold Chronicles on . GOLD is a chemical element with the symbol Au and atomic number 79. It is a dense, soft, malleable, and ductile metal with a bright yellow color and luster that .
https://wn.com/Gold_Mining_In_South_Dakota_|_Largest_Gold_Mine_In_North_America_|_Documentary_|_1940_Hd_Natural_201
The History of Silver Mines documentary
44:19

The History of Silver Mines documentary

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  • Duration: 44:19
  • Updated: 25 Aug 2017
  • views: 198817
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Used in technology, photography, and decorative arts, silver is one of the most versatile metals known to man. In this episode of Modern Marvels we'll explore the methods, men and machines that extract this precious resource from the earth. In Northern Idaho's Lucky Friday mine, workers toil more than a mile underground in an around-the-clock cycle of blasting and hauling silver laden rock. While in the wilds of northern Nevada, large machines and even larger ore loads make the vast Rochester open pit mine one of the most productive silver mines in the United States. Both these facilities owe their methods to the silver strike that started it all: Nevada's famous Comstock Lode of the mid 19th Century. From some of the largest steam engines ever built, to robotic mining machines that work without human intervention, we'll examine the past, present and future of silver mines.
https://wn.com/The_History_Of_Silver_Mines_Documentary
Minnesota Iron Mining Process
6:15

Minnesota Iron Mining Process

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  • Duration: 6:15
  • Updated: 06 Jun 2016
  • views: 67492
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https://wn.com/Minnesota_Iron_Mining_Process
How Copper is Mined and Refined: A Story Of Copper 1951 US Bureau of Mines
33:35

How Copper is Mined and Refined: A Story Of Copper 1951 US Bureau of Mines

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  • Duration: 33:35
  • Updated: 07 Aug 2015
  • views: 48328
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more at http://scitech.quickfound.net/geology_news_and_links.html "Tells the story of the mining and manufacture of copper from the crude ore to the finished product. lots of footage of giant machines, some blasting." Public domain film, slightly cropped to remove uneven edges, with the aspect ratio corrected, and mild video noise reduction applied. The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original). http://creativecommons.org/licenses/by-sa/3.0/ https://en.wikipedia.org/wiki/Copper_extraction_techniques Copper extraction techniques refers to the methods for obtaining copper from its ores. The conversion of copper consists of a series of chemical, physical, and electrochemical processes. Methods have evolved and vary with country depending on the ore source, local environmental regulations, and other factors. As in all mining operations, the ore must usually be beneficiated (concentrated). To do this, the ore is crushed. Then it must be roasted to convert sulfides to oxides, which are smelted to produce matte. Finally, it undergoes various refining processes, the final one being electrolysis. For economic and environmental reasons, many of the byproducts of extraction are reclaimed. Sulfur dioxide gas, for example, is captured and turned into sulfuric acid — which is then used in the extraction process... History The earliest evidence of cold-hammering of native copper comes from the excavation at Çaÿonü Tepesi in eastern Anatolia. The radiocarbon date is 7250 ± 250 BCE. Among the various items considered to be votive or amulets there was one that looked like a fishhook and one like an awl. An archaeological site in southeastern Europe (Serbia) contains the oldest securely dated evidence of copper making at high temperature, from 7,000 years ago. The find in June 2010 extends the known record of copper smelting by about 500 years, and suggests that copper smelting may have been invented in separate parts of Asia and Europe at that time rather than spreading from a single source. Copper smelting technology gave rise to the Copper Age and then the Bronze Age. Concentration Most copper ores contain only a small percentage of copper metal bound up within valuable ore minerals, with the remainder of the ore being unwanted rock or gangue minerals, typically silicate minerals or oxide minerals for which there is often no value. The average grade of copper ores in the 21st century is below 0.6% copper, with a proportion of economic ore minerals (including copper) being less than 2% of the total volume of the ore rock. A key objective in the metallurgical treatment of any ore is the separation of ore minerals from gangue minerals within the rock. The first stage of any process within a metallurgical treatment circuit is accurate grinding or comminution, where the rock is crushed to produce small particles... Subsequent steps depend on the nature of the ore containing the copper. For oxide ores, a hydrometallurgical liberation process is normally undertaken, which uses the soluble nature of the ore minerals to the advantage of the metallurgical treatment plant. For sulfide ores, both secondary (supergene) and primary (hypogene), froth flotation is used to physically separate ore from gangue. For special native copper bearing ore bodies or sections of ore bodies rich in supergene native copper, this mineral can be recovered by a simple gravity circuit... Until the latter half of the 20th century, smelting sulfide ores was almost the sole means of producing copper metal from mined ores (primary copper production)... The copper is refined by electrolysis. The anodes cast from processed blister copper are placed into an aqueous solution of 3–4% copper sulfate and 10–16% sulfuric acid. Cathodes are thin rolled sheets of highly pure copper or, more commonly these days, reusable stainless steel starting sheets (as in the IsaKidd process). A potential of only 0.2–0.4 volts is required for the process to commence. At the anode, copper and less noble metals dissolve. More noble metals such as silver, gold, selenium, and tellurium settle to the bottom of the cell as anode slime, which forms a salable byproduct. Copper(II) ions migrate through the electrolyte to the cathode. At the cathode, copper metal plates out, but less noble constituents such as arsenic and zinc remain in solution unless a higher voltage is used. The reactions are: At the anode: Cu(s) → Cu2+(aq) + 2e− At the cathode: Cu2+(aq) + 2e− → Cu(s)...
https://wn.com/How_Copper_Is_Mined_And_Refined_A_Story_Of_Copper_1951_US_Bureau_Of_Mines
Sago Mine Disaster
43:34

Sago Mine Disaster

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  • Duration: 43:34
  • Updated: 04 Jan 2015
  • views: 125316
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Thirteen men sat in the best barricade they could build, enduring...hoping. They had used their single hour of oxygen from the only Self Contained Self Rescuer issued to them by the company. Their families waited outside living through one of the most difficult times of their lives, praying to see their loved ones once again. As time wore on, we would learn the ultimate fate of those men, those husbands, those fathers, those grandfathers, brothers, uncles, nephews. One was alive, barely holding on…the others had perished in the thick poisoned air of the mine. The miners of Sago were like so many of us. They took one of the few jobs available to them, jobs that would allow them to live in the places they had long called home, jobs that would pay enough to support their families. If only the company had given them more than one SCSR—if only there had been a law—but we know how much power money holds over the hearts of men. It would be the suffering and tragic loss of life of those 12 brave souls—the pain of constant loss felt by their families—that would finally see to it that every coal miner in the United States would never face the same crisis. Millions of Americans became outraged at the events that played out on their televisions, and the ensuing public outcry would accomplish a feat that has seldom been accomplished in the history of US coal mining—the power of coal industry lobbyists was outweighed by the voice of the public in the halls of government. Laws were passed and now additional SCSRs must be purchased by coal companies, underground safe havens must be built and supply miners with three day of oxygen, food, and water. Each time my crew passed a safe haven and SCSR stash on our way to the section, I would think of those men, I would think of their final hours. I would pay my respects to them in my own way and wish that the corruption of the coalfields had not taken their lives. I hope that other miners do the same and remember the day the miners of Sago perished and the hearts of their families were forever broken. May you all rest in peace. God Bless.
https://wn.com/Sago_Mine_Disaster
Canary used for testing for carbon monoxide 1926 US Bureau of Mines
0:52

Canary used for testing for carbon monoxide 1926 US Bureau of Mines

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  • Duration: 0:52
  • Updated: 07 Nov 2012
  • views: 7418
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In the early part of the 20th century, miners in Great Britain and the United States took caged canaries into coalmines in order to provide warning of the presence of toxic gases including carbon monoxide and methane. Canaries would visibly show distress and sway on their perches in the presence low concentrations of carbon monoxide before toppling over. The concept of the "canary in the coal mine" giving warning of a human health hazard is based on several principles. First, canaries were found to be more sensitive than both humans and other animals such as mice to the toxic effects of carbon monoxide. Second, the birds were allowed to share the same air exposures as the humans. Third, the occurrence of carbon monoxide poisoning in a bird was quite recognizable to the miners, since sick birds would tend to fall off of their perches and appear visibly ill. An article appearing in a 1914 issue of the Journal of Industrial and Engineering Chemistry provides a simple description of the concept (Burrell G, Seibert F. Experiments with small animals and carbon monoxide. Jl Indust Eng Chem. 1914;6:241--244.): Birds and mice may be used to detect carbon monoxide, because they are much more sensitive to the poisonous action of the gas than are men. Experiments by the Bureau of Mines show that canaries should be used in preference to mice, sparrows, or pigeons, because canaries are more sensitive to the gas. Rabbits, chickens, guinea pigs, or dogs, although useful for exploration work in mines, should be used only when birds or mice are unobtainable, and then, cautiously, because of their greater resistance to carbon monoxide poisoning. . . . Breathing apparatus must be used where birds show signs of distress, and, for this reason, birds are of great value in enabling rescue parties to use breathing apparatus to best advantage. For more on the use of animals as sensitive indicators of environmental hazards, providing an early warning system for public health, read the 2011Public Health Report - Animal Sentinels for Environmental and Public Health (http://www.publichealthreports.org/issueopen.cfm?articleID=2645 ) by John S. Reif, DVM, MSc, at Colorado State University, Department of Environmental and Radiological Health Sciences. This is clipped from the 1926 film by the US Bureau of Mines titles, Oxygen Breathing Apparatus. The film shows the kinds of breathing apparatus used in mine rescues and explains their various parts. A mine rescue team explores a mine, testing for low oxygen content and carbon monoxide. The entire film is posted to my channel. This US Bureau of Mines film and many others are available at the US National Archive in College Park, Maryland.
https://wn.com/Canary_Used_For_Testing_For_Carbon_Monoxide_1926_US_Bureau_Of_Mines