Mining is the extraction of valuable geological materials and minerals from the surface of the Earth . Mining is required to obtain most materials that cannot be grown through agricultural processes , or feasibly created artificially in a laboratory or factory. Ores recovered by mining include metals , coal , oil shale , gemstones , limestone , chalk , dimension stone , rock salt , potash , gravel , and clay . The ore must be a rock or mineral that contains valuable constituent, can be extracted or mined and sold for profit. Mining in a wider sense includes extraction of any non-renewable resource such as petroleum , natural gas , or even water .
135-606: William Andrews Clark Sr. (January 8, 1839 – March 2, 1925) was an American entrepreneur, involved with mining , banking , and railroads , as well as a politician. Clark was born in Connellsville, Pennsylvania . He moved with his family to Iowa in 1856 where he taught school and studied law at Iowa Wesleyan College . In 1862, he traveled west to become a miner. After working in quartz mines in Colorado, in 1863 Clark made his way to new gold fields to find his fortune in
270-506: A special election to fill vacancies in the Senate . It also allows a state's legislature to permit its governor to make temporary appointments, which last until a special election is held to fill the vacancy. Currently, all but four states (North Dakota, Oregon, Rhode Island, and Wisconsin) permit such appointments. The Constitution does not set out how the temporary appointee is to be selected. Oklahoma , admitted to statehood in 1907, chose
405-477: A Senate seat for Delaware went unfilled from 1899 until 1903. The business of holding elections also caused great disruption in the state legislatures, with a full third of the Oregon House of Representatives choosing not to swear the oath of office in 1897 due to a dispute over an open Senate seat. The result was that Oregon's legislature was unable to pass legislation that year. Zywicki again argues that this
540-637: A U.S. senator legislatively. The first election subject to the Seventeenth Amendment was a late election in Georgia held June 15, 1913 . Augustus Octavius Bacon was however unopposed. The first direct elections to the Senate following the Seventeenth Amendment being adopted were: In Trinsey v. Pennsylvania (1991), the United States Court of Appeals for the Third Circuit was faced with
675-465: A concern as well, and where enforced, modern practices have significantly improved safety in mines. Unregulated, poorly regulated or illegal mining , especially in developing economies , frequently contributes to local human rights violations and environmental conflicts . Mining can also perpetuate political instability through resource conflicts . Since the beginning of civilization, people have used stone , clay and, later, metals found close to
810-466: A constitutional amendment would be pointless. The reform was considered by opponents to threaten the rights and independence of the states, who were "sovereign, entitled ... to have a separate branch of Congress ... to which they could send their ambassadors." This was countered by the argument that a change in the mode in which senators were elected would not change their responsibilities. The Senate freshman class of 1910 brought new hope to
945-506: A convention without formally calling for one. In 1911, the House of Representatives passed House Joint Resolution 39 proposing a constitutional amendment for direct election of senators. The original resolution passed by the House contained the following clause: The times, places, and manner of holding elections for Senators shall be as prescribed in each State by the legislature thereof. This so-called "race rider" clause would have strengthened
1080-636: A hopper and a shaking screen or trommel which frees the desired minerals from the waste gravel. The minerals are then concentrated using sluices or jigs. Large drills are used to sink shafts, excavate stopes, and obtain samples for analysis. Trams are used to transport miners, minerals and waste. Lifts carry miners into and out of mines, and move rock and ore out, and machinery in and out, of underground mines. Huge trucks, shovels and cranes are employed in surface mining to move large quantities of overburden and ore. Processing plants use large crushers, mills, reactors, roasters and other equipment to consolidate
1215-418: A less permanent and a less trusted body than state legislatures, and moving the responsibility for the election of senators to them would see it passing into the hands of a body that "[lasted] but a day" before changing. Other counterarguments were that renowned senators could not have been elected directly and that, since a large number of senators had experience in the House (which was already directly elected),
1350-582: A major of a battalion that pursued Chief Joseph and his band in the Nez Perces invasion of 1877." Between 1884 and 1888, Clark constructed a 34-room, Tiffany-decorated home on West Granite Street, incorporating the most modern inventions available, in Butte, Montana . This home is now the Copper King Mansion bed-and-breakfast, as well as a museum. In 1899, Clark built Columbia Gardens (amusement park) for
1485-597: A majority. In reaction, the Congress passed a bill in July 1866 that required state legislatures to elect senators by an absolute majority. By the 1890s, support for the introduction of direct election for the Senate had substantially increased, and reformers worked on two fronts. On the first front, the Populist Party incorporated the direct election of senators into its Omaha Platform , adopted in 1892. In 1908 , Oregon passed
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#17328586847961620-875: A mass of actual rock. Both types of ore deposit, placer or lode, are mined by both surface and underground methods. Some mining, including much of the rare earth elements and uranium mining , is done by less-common methods, such as in-situ leaching : this technique involves digging neither at the surface nor underground. The extraction of target minerals by this technique requires that they be soluble, e.g., potash , potassium chloride , sodium chloride , sodium sulfate , which dissolve in water. Some minerals, such as copper minerals and uranium oxide , require acid or carbonate solutions to dissolve. Explosives in Mining Explosives have been used in surface mining and sub-surface mining to blast out rock and ore intended for processing. The most common explosive used in mining
1755-426: A mining operation. Once the analysis determines a given ore body is worth recovering, development begins to create access to the ore body. The mine buildings and processing plants are built, and any necessary equipment is obtained. The operation of the mine to recover the ore begins and continues as long as the company operating the mine finds it economical to do so. Once all the ore that the mine can produce profitably
1890-503: A more sustainable future, the demand for metals is set to skyrocket. Between 2022 and 2050, an estimated 7 billion metric tons of metals will need to be extracted. Steel will account for the largest portion of this total at 5 billion tons, followed by aluminum at 950 million tons, copper at 650 million tons, graphite at 170 million tons, nickel at 100 million tons, and other metals. Notably, the energy expenditure required to extract these metals will soon surpass that of coal mining, highlighting
2025-707: A much larger and more extravagant 121-room mansion on Fifth Avenue in New York City, the William A. Clark House . He died on March 2, 1925, and is interred in Woodlawn Cemetery in the Bronx , New York City. Clark served as president of both Montana state constitutional conventions in 1884 and 1889. Clark yearned to be a statesman and used his newspaper, the Butte Miner , to push his political ambitions. At this time, Butte
2160-600: A senator by legislative election three times: twice in 1907, when admitted, and once in 1908. In 1912, Oklahoma reelected Robert Owen by advisory popular vote. Oregon held primaries in 1908 in which the parties would run candidates for that position, and the state legislature pledged to choose the winner as the new senator. New Mexico , admitted to statehood in 1912, chose only its first two senators legislatively. Arizona , admitted to statehood in 1912, chose its first two senators by advisory popular vote. Alaska , and Hawaii , admitted to statehood in 1959, have never chosen
2295-444: A similar method. William Randolph Hearst opened a nationwide popular readership for direct election of U.S. senators in a 1906 series of articles using flamboyant language attacking "The Treason of the Senate" in his Cosmopolitan magazine. David Graham Philips, a muckraker , described Nelson Aldrich of Rhode Island as the principal "traitor" among the "scurvy lot" in control of the Senate by theft, perjury, and bribes corrupting
2430-495: A situation where, following the death of Senator John Heinz of Pennsylvania , Governor Bob Casey had provided for a replacement and for a special election that did not include a primary . A voter and prospective candidate, John S. Trinsey Jr., argued that the lack of a primary violated the Seventeenth Amendment and his right to vote under the Fourteenth Amendment . The Third Circuit rejected these arguments, ruling that
2565-431: A state's Senate election years were perceived to have become so dominated by the business of picking senators that the state's choice for senator distracted the electorate from all other pertinent issues. Senator John H. Mitchell noted that the Senate became the "vital issue" in all legislative campaigns, with the policy stances and qualifications of state legislative candidates ignored by voters who were more interested in
2700-408: A strong inducement to extract these metals or to lease the deposits and collect royalties from mine operators. English, German , and Dutch capital combined to finance extraction and refining . Hundreds of German technicians and skilled workers were brought over; in 1642 a colony of 4,000 foreigners was mining and smelting copper at Keswick in the northwestern mountains. Use of water power in
2835-457: A substantial benefit to the states. Notwithstanding controversies over the effects of the Seventeenth Amendment, advocates have emerged to reform or repeal the amendment. At the beginning of President Barack Obama 's administration in 2009, four sitting Democratic senators left the Senate for executive branch positions: Obama himself (President), Joe Biden (Vice President), Hillary Clinton (Secretary of State), and Ken Salazar (Secretary of
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#17328586847962970-635: Is ammonium nitrate . Between 1870 and 1920, in Queensland Australia, an increase in mining accidents lead to more safety measures surrounding the use of explosives for mining. In the United States of America, between 1990 and 1999, about 22.3 billion kilograms of explosives were used in mining quarrying and other industries; Moreover " coal mining used 66.4%, nonmetal mining and quarrying 13.5%, metal mining 10.4%, construction 7.1%, and all other users 2.6%". Artisanal and small-scale mining (ASM)
3105-811: Is a blanket term for a type of subsistence mining involving a miner who may or may not be officially employed by a mining company but works independently, mining minerals using their own resources, usually by hand. While there is no completely coherent definition for ASM, artisanal mining generally includes miners who are not officially employed by a mining company and use their own resources to mine. As such, they are part of an informal economy . ASM also includes, in small-scale mining, enterprises or individuals that employ workers for mining, but who generally still use similar manually-intensive methods as artisanal miners (such as working with hand tools). In addition, ASM can be characterized as distinct from large-scale mining (LSM) by less efficient extraction of pure minerals from
3240-413: Is a major cause of the " swamp ". In September 2020, Senator Ben Sasse of Nebraska endorsed the repeal of the Seventeenth Amendment in a Wall Street Journal opinion piece . Politics, like nature, abhorred a vacuum, so senators felt the pressure to do something, namely enact laws. Once senators were no longer accountable to and constrained by state legislatures, the maximizing function for senators
3375-506: Is dependent on investment, labor, energy, refining, and transportation cost. Mining operations can create a negative environmental impact, both during the mining activity and after the mine has closed. Hence, most of the world's nations have passed regulations to decrease the impact; however, the outsized role of mining in generating business for often rural, remote or economically depressed communities means that governments often fail to fully enforce such regulations. Work safety has long been
3510-476: Is done by removing surface vegetation, dirt, and bedrock to reach buried ore deposits. Techniques of surface mining include: open-pit mining , which is the recovery of materials from an open pit in the ground; quarrying , identical to open-pit mining except that it refers to sand, stone and clay; strip mining , which consists of stripping surface layers off to reveal ore underneath; and mountaintop removal , commonly associated with coal mining, which involves taking
3645-699: Is home to the Verde Canyon Railroad wilderness train ride which follows the historic route that Clark had constructed in 1911 and home to the Copper Art Museum. Mining 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 or restoration of the land after the mine is closed. Mining materials are often obtained from ore bodies, lodes , veins , seams , reefs , or placer deposits . The exploitation of these deposits for raw materials
3780-613: Is mining upward, creating a sloping underground room, long wall mining , which is grinding a long ore surface underground, and room and pillar mining, which is removing ore from rooms while leaving pillars in place to support the roof of the room. Room and pillar mining often leads to retreat mining , in which supporting pillars are removed as miners retreat, allowing the room to cave in, thereby loosening more ore. Additional sub-surface mining methods include hard rock mining , bore hole mining, drift and fill mining, long hole slope mining, sub level caving, and block caving . Heavy machinery
3915-484: Is much more common, and produces, for example, 85% of minerals (excluding petroleum and natural gas) in the United States, including 98% of metallic ores. Targets are divided into two general categories of materials: placer deposits , consisting of valuable minerals contained within river gravels, beach sands, and other unconsolidated materials ; and lode deposits , where valuable minerals are found in veins, in layers, or in mineral grains generally distributed throughout
4050-413: Is not of immediate interest to the miner. The total movement of ore and waste constitutes the mining process. Often more waste than ore is mined during the life of a mine, depending on the nature and location of the ore body. Waste removal and placement is a major cost to the mining operator, so a detailed characterization of the waste material forms an essential part of the geological exploration program for
4185-584: Is recovered, reclamation can begin, to make the land used by the mine suitable for future use. Technical and economic challenges notwithstanding, successful mine development must also address human factors. Working conditions are paramount to success, especially with regard to exposures to dusts, radiation, noise, explosives hazards, and vibration, as well as illumination standards. Mining today increasingly must address environmental and community impacts, including psychological and sociological dimensions. Thus, mining educator Frank T. M. White (1909–1971), broadened
William A. Clark - Misplaced Pages Continue
4320-634: Is the largest producer of diamonds in Africa, with an estimated 12 million carats in 2019. Other types of mining reserves in Africa include cobalt , bauxite , iron ore , coal, and copper . Gold and coal mining started in Australia and New Zealand in the 19th century. Nickel has become important in the economy of New Caledonia . In Fiji , in 1934, the Emperor Gold Mining Company Ltd. established operations at Vatukoula , followed in 1935 by
4455-423: Is to conduct a feasibility study to evaluate the financial viability, the technical and financial risks, and the robustness of the project. This is when the mining company makes the decision whether to develop the mine or to walk away from the project. This includes mine planning to evaluate the economically recoverable portion of the deposit, the metallurgy and ore recoverability, marketability and payability of
4590-419: Is used in mining to explore and develop sites, to remove and stockpile overburden, to break and remove rocks of various hardness and toughness, to process the ore, and to carry out reclamation projects after the mine is closed. Bulldozers, drills, explosives and trucks are all necessary for excavating the land. In the case of placer mining , unconsolidated gravel, or alluvium , is fed into machinery consisting of
4725-550: The Amalgamated Copper Mining Company , portrayed Clark as the very embodiment of Gilded Age excess and corruption: He is as rotten a human being as can be found anywhere under the flag; he is a shame to the American nation, and no one has helped to send him to the Senate who did not know that his proper place was the penitentiary, with a ball and chain on his legs. To my mind he is the most disgusting creature that
4860-513: The Greek author Diodorus Siculus , who mentions fire-setting as one method used to break down the hard rock holding the gold . One of the complexes is shown in one of the earliest known mining maps. The miners crushed the ore and ground it to a fine powder before washing the powder for the gold dust known as the dry and wet attachment processes. Mining in Europe has a very long history. Examples include
4995-606: The House of Representatives , a body elected by popular vote, and was described as an uncontroversial decision; at the time, James Wilson was the sole advocate of popularly electing the Senate, but his proposal was defeated 10–1. There were many advantages to the original method of electing senators. Prior to the Constitution, a federal body was one where states effectively formed nothing more than permanent treaties, with citizens retaining their loyalty to their original state. However, under
5130-608: The Montana gold rush . He settled in the capital of Montana Territory , Bannack, Montana , and began placer mining . Though his claim paid only moderately, Clark invested his earnings in becoming a trader, driving mules back and forth between Salt Lake City and the boomtowns of Montana to transport eggs and other basic supplies. He soon changed careers again and became a banker in Deer Lodge, Montana . He repossessed mining properties when owners defaulted on their loans, placing him in
5265-463: The November 1914 election ; it was complete on March 4, 1919, when the senators chosen by the November 1918 election took office. The Senate of the United States shall be composed of two Senators from each State, elected by the people thereof, for six years; and each Senator shall have one vote. The electors in each State shall have the qualifications requisite for electors of the most numerous branch of
5400-672: The Tea Party movement argued for repealing the Seventeenth Amendment entirely, claiming it would protect states' rights and reduce the power of the federal government. On March 2, 2016, the Utah legislature approved Senate Joint Resolution No. 2 asking Congress to offer an amendment to the United States Constitution that would repeal the Seventeenth Amendment. As of 2010 , no other states had supported such an amendment, and some politicians who had made statements in favor of repealing
5535-507: The argentiferous galena in the mines of Cartagena ( Cartago Nova ), Linares ( Castulo ), Plasenzuela and Azuaga , among many others. Spain was one of the most important mining regions, but all regions of the Roman Empire were exploited. In Great Britain the natives had mined minerals for millennia , but after the Roman conquest , the scale of the operations increased dramatically, as
William A. Clark - Misplaced Pages Continue
5670-806: The greenstone of the Langdale axe industry based in the English Lake District . The oldest-known mine on archaeological record is the Ngwenya Mine in Eswatini (Swaziland) , which radiocarbon dating shows to be about 43,000 years old. At this site Paleolithic humans mined hematite to make the red pigment ochre . Mines of a similar age in Hungary are believed to be sites where Neanderthals may have mined flint for weapons and tools. Ancient Egyptians mined malachite at Maadi . At first, Egyptians used
5805-409: The "better men" of society, but different as they would be conscientiously chosen by the upper houses of state legislatures for fixed terms, and not merely inherited for life. It was hoped they would provide abler deliberation and greater stability than the House of Representatives due to the senators' status. Those in favor of popular elections for senators believed two primary problems were caused by
5940-496: The "most prominent" proponent being Andrew Johnson , who raised the issue in 1868 and considered the idea's merits "so palpable" that no additional explanation was necessary. As noted above, in the 1860s, there was a major congressional dispute over the issue, with the House and Senate voting to veto the appointment of John P. Stockton to the Senate due to his approval by a plurality of the New Jersey Legislature rather than
6075-505: The 21st century begins, 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. In 2023, 8.5 billion metric tons of coal were extracted from the Earth's crust. However, as the global economy transitions away from fossil fuels and toward
6210-663: The 7th century to the 14th century. Gold was often traded to Mediterranean economies that demanded gold and could supply salt , even though much of Africa was abundant with salt due to the mines and resources in the Sahara desert . The trading of gold for salt was mostly used to promote trade between the different economies. Since the Great Trek in the 19th century, after, gold and diamond mining in Southern Africa has had major political and economic impacts. The Democratic Republic of Congo
6345-524: The Earth's surface. These were used to make early tools and weapons; for example, high quality flint found in northern France , southern England and Poland was used to create flint tools . Flint mines have been found in chalk areas where seams of the stone were followed underground by shafts and galleries. The mines at Grimes Graves and Krzemionki are especially famous, and like most other flint mines, are Neolithic in origin (c. 4000–3000 BC). Other hard rocks mined or collected for axes included
6480-644: The French crown to operate mines in 1733, becoming "the first practical miner on Lake Superior"; seven years later, mining was halted by an outbreak between Sioux and Chippewa tribes. Mining in the United States became widespread in the 19th century, and the United States Congress passed the General Mining Act of 1872 to encourage mining of federal lands. As with the California Gold Rush in
6615-569: The Interior). Controversies developed about the successor appointments made by Illinois governor Rod Blagojevich and New York governor David Paterson . New interest was aroused in abolishing the provision for the Senate appointment by the governor. Accordingly, Senator Russ Feingold of Wisconsin and Representative David Dreier of California proposed an amendment to remove this power; senators John McCain and Dick Durbin became co-sponsors, as did Representative John Conyers . Some members of
6750-630: The Loloma Gold Mines, N.L., and then by Fiji Mines Development Ltd. (aka Dolphin Mines Ltd.). These developments ushered in a “mining boom”, with gold production rising more than a hundred-fold, from 931.4 oz in 1934 to 107,788.5 oz in 1939, an order of magnitude then comparable to the combined output of New Zealand and Australia's eastern states. During prehistoric times, early Americans mined large amounts of copper along Lake Superior 's Keweenaw Peninsula and in nearby Isle Royale ; metallic copper
6885-481: The Montana legislature, Clark is reported to have said, "I never bought a man who wasn't for sale." Clark died at the age of 86 in his New York City mansion. His estate at his death was estimated to be worth $ 300 million, (equivalent to $ 4.15 billion in 2023), making him one of the wealthiest Americans ever. In a 1907 essay, Mark Twain , who was a close friend of Clark's rival, Henry H. Rogers , an organizer of
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#17328586847967020-431: The Montana legislature. But conservative analysts Bybee and Todd Zywicki believe this concern was largely unfounded; there was a "dearth of hard information" on the subject. In more than a century of legislative elections of U.S. senators, only ten cases were contested for allegations of impropriety. Electoral deadlocks were another issue. Because state legislatures were charged with deciding whom to appoint as senators,
7155-679: The Northeast by picking up new seats in New Mexico, Utah and Wyoming, retaining control of the Senate. Similarly, Bybee believes the Republican Revolution of 1994 would not have happened without direct election of Senators; instead, the Democrats would have controlled 70 seats in the Senate to the Republicans' 30. The reputation of corrupt and arbitrary state legislatures continued to decline as
7290-477: The Romans needed Britannia 's resources, especially gold , silver , tin , and lead . Roman techniques were not limited to surface mining. They followed the ore veins underground once opencast mining was no longer feasible. At Dolaucothi they stoped out the veins and drove adits through bare rock to drain the stopes. The same adits were also used to ventilate the workings, especially important when fire-setting
7425-550: The Senate had a beneficial effect on the states, as it led state legislative campaigns to focus on local rather than national issues. New Deal legislation is another example of expanding federal regulation overruling the state legislatures promoting their local state interests in coal, oil, corn and cotton. Ure agrees, saying that not only is each senator now free to ignore his state's interests, senators "have incentive to use their advice-and-consent powers to install Supreme Court justices who are inclined to increase federal power at
7560-417: The Senate into a body that could counter the populism of the House. While the representatives operated in a two-year direct election cycle, making them frequently accountable to their constituents, the senators could afford to "take a more detached view of issues coming before Congress". State legislatures retained the theoretical right to "instruct" their senators to vote for or against proposals, thus giving
7695-416: The Senate joined the House of Representatives in implementing popular reforms. Bybee has argued that the amendment led to complete "ignominy" for state legislatures without the buttress of a state-based check on Congress. In the decades following the Seventeenth Amendment, the federal government was enabled to enact progressive measures. However, Schleiches argues that the separation of state legislatures and
7830-458: The Senate. On the second national legislative front, reformers worked toward a constitutional amendment, which was strongly supported in the House of Representatives but initially opposed by the Senate. Bybee notes that the state legislatures, which would lose power if the reforms went through, were supportive of the campaign. By 1910, 31 state legislatures had passed resolutions calling for a constitutional amendment allowing direct election, and in
7965-441: The Senate. Bryan and the reformers argued for popular election through highlighting flaws they saw within the existing system, specifically corruption and electoral deadlocks, and through arousing populist sentiment. Most important was the populist argument; that there was a need to "Awaken, in the senators ... a more acute sense of responsibility to the people", which it was felt they lacked; election through state legislatures
8100-506: The Seventeenth Amendment does not require primaries. Another subject of analysis is whether statutes restricting the authority of governors to appoint temporary replacements are constitutional. Vikram Amar , writing in the Hastings Constitutional Law Quarterly , claims Wyoming's requirement that its governor fill a senatorial vacancy by nominating a person of the same party as the person who vacated that seat violates
8235-410: The Seventeenth Amendment. This is based on the text of the Seventeenth Amendment, which states that "the legislature of any state may empower the executive thereof to make temporary appointments". The amendment only empowers the legislature to delegate the authority to the governor and, once that authority has been delegated, does not permit the legislature to intervene. The authority is to decide whether
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#17328586847968370-472: The South was de facto one-party states. The "rider" was intended to enable these states to continue these practices, protected from any federal interference. When the resolution came before the Senate, Senator Joseph L. Bristow (R-KS) proposed an amendment which eliminated the rider. This amendment was approved by 45 votes to 44 after Vice President Sherman cast a tie-breaking "yea" vote. The amended resolution
8505-589: The Spanish to pulverize ore after being mined. This device was powered by animals and used the same principles used for grain threshing . Much of the knowledge of medieval mining techniques comes from books such as Biringuccio 's De la pirotechnia and probably most importantly from Georg Agricola 's De re metallica (1556). These books detail many different mining methods used in German and Saxon mines. A prime issue in medieval mines, which Agricola explains in detail,
8640-481: The State legislatures. When vacancies happen in the representation of any State in the Senate, the executive authority of such State shall issue writs of election to fill such vacancies: Provided, That the legislature of any State may empower the executive thereof to make temporary appointments until the people fill the vacancies by election as the legislature may direct. This amendment shall not be so construed as to affect
8775-730: The Umm el-Sawwan site; gypsum was used to make funerary items for private tombs. Other minerals mined in Egypt from the Old Kingdom (2649-2134 BC) until the Roman Period (30 BC-AD 395) including granite , sandstone , limestone , basalt , travertine , gneiss , galena , and amethyst . Mining in Egypt occurred in the earliest dynasties. The gold mines of Nubia were among the largest and most extensive of any in Ancient Egypt. These mines are described by
8910-696: The amendment had subsequently reversed their position on this. On July 28, 2017, after Republican senators John McCain , Susan Collins and Lisa Murkowski voted against the Health Care Freedom Act , which would have repealed the Affordable Care Act , former Arkansas governor Mike Huckabee endorsed the repeal of the Seventeenth Amendment. He claimed that senators chosen by state legislatures "will work for their states and respect [the Tenth Amendment]", and also that direct election of senators
9045-521: The auction block at Christie's in June 2014, over three years after her death. Clark's nephew, Walter Miller Clark, son of James Ross and Miriam Augusta (Evans) Clark, along with Walter's wife, Virginia (McDowell) Clark, were passengers on the RMS Titanic . They were on their honeymoon. He was among the 1,514 who died on April 15, 1912, after the ship struck an iceberg at 2:20 a.m. Walter's wife, Virginia,
9180-457: The basis for the 2013 bestselling book Empty Mansions: The Mysterious Life of Huguette Clark and the Spending of a Great American Fortune. by investigative reporter Bill Dedman and Paul Clark Newell, Jr. Her final residence was Beth Israel Medical Center , where she died on the morning of May 24, 2011, age 104. Huguette's extraordinary collection of arts and antiquities were consigned to go on
9315-521: The bright green malachite stones for ornamentations and pottery . Later, between 2613 and 2494 BC, large building projects required expeditions abroad to the area of Wadi Maghareh in order to secure minerals and other resources not available in Egypt itself. Quarries for turquoise and copper were also found at Wadi Hammamat , Tura , Aswan and various other Nubian sites on the Sinai Peninsula and at Timna . Quarries for gypsum were found at
9450-502: The chambers would meet in "joint assembly" to assess the results, and if a majority in both chambers had voted for the same person, he would be elected. If not, the joint assembly would vote for a senator, with each member receiving a vote. If no person received a majority, the joint assembly was required to keep convening every day to take at least one vote until a senator was elected. Nevertheless, between 1891 and 1905, 46 elections were deadlocked across 20 states; in one extreme example,
9585-481: The children of Butte. It included flower gardens, a dance pavilion, an amusement park, a lake, and picnic areas. An evening scene between characters Arline Simms (played by Anne Francis ) and Buz Murdock (played by George Maharis ) from the Route 66 television series 1961 episode "A Month of Sundays" was shot on location at Columbia Gardens where she emotionally falls into his arms on the grand staircase. Clark later built
9720-656: The construction of a new wing for the Corcoran, known appropriately as the Clark Wing. The city of Las Vegas was established as a maintenance stop for Clark's San Pedro, Los Angeles and Salt Lake Railroad . He subdivided 110 acres (45 ha) into 1200 lots, some of which on the corner of Fremont Street in Las Vegas sold for as much as $ 1750. The Las Vegas area was organized as Clark County, Nevada , in Clark's honor. Clark's involvement in
9855-417: The cutter-head is progressively launched further into the coal seam. High wall mining can produce thousands of tons of coal in contour-strip operations with narrow benches, previously mined areas, trench mine applications and steep-dip seams. Sub-surface mining consists of digging tunnels or shafts into the earth to reach buried ore deposits. Ore, for processing, and waste rock, for disposal, are brought to
9990-452: The election of John P. Stockton (D-NJ), which happened after the New Jersey legislature changed its rules regarding the definition of a quorum and was thus by plurality instead of by absolute majority. In 1866, Congress acted to standardize a two-step process for Senate elections. In the first step, each chamber of the state legislature would meet separately to vote. The following day,
10125-538: The election or term of any Senator chosen before it becomes valid as part of the Constitution. Originally, under Article I, Section 3 , Clauses 1 and 2 of the Constitution , each state legislature elected its state's senators for a six-year term. Each state, regardless of size, is entitled to two senators as part of the Connecticut Compromise between the small and large states. This contrasted with
10260-513: The expense of state sovereignty". Over the first half of the 20th century, with a popularly elected Senate confirming nominations, both Republican and Democratic, the Supreme Court began to apply the Bill of Rights to the states , overturning state laws whenever they harmed individual state citizens. It aimed to limit the influence of the wealthy. The Seventeenth Amendment requires a governor to call
10395-419: The first law basing the selection of U.S. senators on a popular vote. Oregon was soon followed by Nebraska . Proponents for popular election noted that ten states already had non-binding primaries for Senate candidates, in which the candidates would be voted on by the public, effectively serving as advisory referendums instructing state legislatures how to vote; reformers campaigned for more states to introduce
10530-698: The focus to the “total environment of mining”, including reference to community development around mining, and how mining is portrayed to an urban society, which depends on the industry, although seemingly unaware of this dependency. He stated, “[I]n the past, mining engineers have not been called upon to study the psychological, sociological and personal problems of their own industry – aspects that nowadays are assuming tremendous importance. The mining engineer must rapidly expand his knowledge and his influence into these newer fields.” Mining techniques can be divided into two common excavation types: surface mining and sub-surface (underground) mining . Today, surface mining
10665-481: The form of water mills was extensive. The water mills were employed in crushing ore, raising ore from shafts, and ventilating galleries by powering giant bellows . Black powder was first used in mining in Selmecbánya , Kingdom of Hungary (now Banská Štiavnica , Slovakia) in 1627. Black powder allowed blasting of rock and earth to loosen and reveal ore veins. Blasting was much faster than fire-setting and allowed
10800-423: The founding of Las Vegas is recounted in a decidedly negative light by Chris Romano in the "Las Vegas" episode of Comedy Central 's Drunk History , with Rich Fulcher portraying Clark. Clarkdale, Arizona , named for Clark, was the site of smelting operations for Clark's mines in nearby Jerome, Arizona . The town includes the historic Clark Mansion, which sustained severe fire damage on June 25, 2010. Clarkdale
10935-426: The governor shall have the power to appoint temporary senators, not whom the governor may appoint. Sanford Levinson , in his rebuttal to Amar, argues that rather than engaging in a textual interpretation, those examining the meaning of constitutional provisions should interpret them in the fashion that provides the most benefit, and that legislatures' being able to restrict gubernatorial appointment authority provides
11070-400: The growing importance of sustainable metal extraction practices. The process of mining from discovery of an ore body through extraction of minerals and finally to returning the land to its natural state consists of several distinct steps. The first is discovery of the ore body, which is carried out through prospecting or exploration to find and then define the extent, location and value of
11205-447: The indirect Senate election. To remedy this, some state legislatures created "advisory elections" that served as de facto general elections, allowing legislative campaigns to focus on local issues. Calls for a constitutional amendment regarding Senate elections started in the early 19th century, with Henry R. Storrs in 1826 proposing an amendment to provide for popular election. Similar amendments were introduced in 1829 and 1855, with
11340-525: The metals due to the difficulties of transporting them, but the copper was eventually traded throughout the continent along major river routes. In the early colonial history of the Americas, "native gold and silver was quickly expropriated and sent back to Spain in fleets of gold- and silver-laden galleons", the gold and silver originating mostly from mines in Central and South America. Turquoise dated at 700 AD
11475-753: The mid-19th century, mining for minerals and precious metals, along with ranching , became a driving factor in the U.S. Westward Expansion to the Pacific coast. With the exploration of the West, mining camps sprang up 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 people traveled West for work opportunities in mining. Western cities such as Denver and Sacramento originated as mining towns. When new areas were explored, it
11610-492: The mid-sixteenth century. On the continent, mineral deposits belonged to the crown, and this regalian right was stoutly maintained. But in England, royal mining rights were restricted to gold and silver (of which England had virtually no deposits) by a judicial decision of 1568 and a law in 1688. England had iron , zinc , copper , lead , and tin ores. Landlords who owned the base metals and coal under their estates then had
11745-432: The minehead, where the water was stored in large reservoirs and tanks. When a full tank was opened, the flood of water sluiced away the overburden to expose the bedrock underneath and any gold-bearing veins. The rock was then worked by fire-setting to heat the rock, which would be quenched with a stream of water. The resulting thermal shock cracked the rock, enabling it to be removed by further streams of water from
11880-645: The mineral-rich material and extract the desired compounds and metals from the ore. Seventeenth Amendment to the United States Constitution The Seventeenth Amendment ( Amendment XVII ) to the United States Constitution established the direct election of United States senators in each state. The amendment supersedes Article I, Section 3 , Clauses 1 and 2 of the Constitution, under which senators were elected by state legislatures . It also alters
12015-546: The mining industry. He made a fortune with copper mining, small smelters , electric power companies, newspapers, railroads (trolley lines around Butte and the San Pedro, Los Angeles and Salt Lake Railroad from Salt Lake City , Utah to San Pedro and Los Angeles , California ), and other businesses, becoming known as one of three " Copper Kings " of Butte, Montana , along with Marcus Daly and F. Augustus Heinze . The November 1903 Congressional Directory notes that Clark "was
12150-431: The mining of previously impenetrable metals and ores. In 1762, one of the world's first mining academies was established in the same town there. The widespread adoption of agricultural innovations such as the iron plowshare , as well as the growing use of metal as a building material, was also a driving force in the tremendous growth of the iron industry during this period. Inventions like the arrastra were often used by
12285-420: The new Constitution, the federal government was granted substantially more power than before. Having the state legislatures elect the senators reassured anti-federalists that there would be some protection against the federal government's swallowing up states and their powers, and providing a check on the power of the federal government. Additionally, the longer terms and avoidance of popular election turned
12420-405: The ore body. This leads to a mathematical resource estimation to estimate the size and grade of the deposit. This estimation is used to conduct a pre-feasibility study to determine the theoretical economics of the ore deposit. This identifies, early on, whether further investment in estimation and engineering studies is warranted and identifies key risks and areas for further work. The next step
12555-462: The ore concentrates, engineering concerns, milling and infrastructure costs, finance and equity requirements, and an analysis of the proposed mine from the initial excavation all the way through to reclamation. The proportion of a deposit that is economically recoverable is dependent on the enrichment factor of the ore in the area. To gain access to the mineral deposit within an area it is often necessary to mine through or remove waste material which
12690-442: The ore, lower wages, decreased occupational safety, benefits, and health standards for miners, and a lack of environmental protection measures. Artisanal miners often undertake the activity of mining seasonally. For example, crops are planted in the rainy season , and mining is pursued in the dry season . However, they also frequently travel to mining areas and work year-round. There are four broad types of ASM: Surface mining
12825-441: The original provisions: legislative corruption and electoral deadlocks. There was a sense that senatorial elections were "bought and sold", changing hands for favors and sums of money rather than because of the competence of the candidate. Between 1857 and 1900, the Senate investigated three elections over corruption. In 1900, for example, William A. Clark had his election voided after the Senate concluded that he had bought votes in
12960-556: The overhead tanks. The Roman miners used similar methods to work cassiterite deposits in Cornwall and lead ore in the Pennines . Sluicing methods were developed by the Romans in Spain in 25 AD to exploit large alluvial gold deposits, the largest site being at Las Medulas , where seven long aqueducts tapped local rivers and sluiced the deposits. The Romans also exploited the silver present in
13095-443: The powers of states over senatorial elections and weakened those of Congress by overriding Congress's power to override state laws affecting the manner of senatorial elections. Since the 1890s, nearly all blacks in the South, and many poor whites, had been disenfranchised by new provisions in state constitutions that were discriminatory in practice. This meant that these millions of people had no political representation, and most of
13230-585: The procedure for filling vacancies in the Senate , allowing for state legislatures to permit their governors to make temporary appointments until a special election can be held. The amendment was proposed by the 62nd Congress in 1912 and became part of the Constitution on April 8, 1913, on ratification by three-quarters (36) of the state legislatures. Sitting senators were not affected until their existing terms expired. The transition began with two special elections in Georgia and in Maryland , then in earnest with
13365-481: The process for electing United States senators and changed the way vacancies would be filled. Originally, the Constitution required state legislatures to fill Senate vacancies. According to Judge Bybee, the Seventeenth Amendment had a dramatic impact on the political composition of the U.S. Senate. Before the Supreme Court required " one man, one vote " in Reynolds v. Sims (1964), malapportionment of state legislatures
13500-450: The reformers. Fourteen of the thirty newly elected senators had been elected through party primaries, which amounted to popular choice in their states. More than half of the states had some form of primary selection for the Senate. The Senate finally joined the House to submit the Seventeenth Amendment to the states for ratification, nearly ninety years after it first was presented to the Senate in 1826. By 1912, 239 political parties at both
13635-541: The remainder of her life lived in various New York City hospitals. In February 2010, she became the subject of a series of reports on MSNBC after it was reported that the caretakers of her three residences (including a $ 24 million estate in Connecticut , a sprawling seaside estate in Santa Barbara, California and her Fifth Avenue apartments valued at $ 100 million) had not seen her in decades. These articles were
13770-431: The remaining part of a coal seam previously exploited by other surface-mining techniques has too much overburden to be removed but can still be profitably exploited from the side of the artificial cliff made by previous mining. A typical cycle alternates sumping, which undercuts the seam, and shearing, which raises and lowers the cutter-head boom to cut the entire height of the coal seam. As the coal recovery cycle continues,
13905-559: The republic has produced since Tweed's time. Clark was married twice. His first marriage was to Katherine Louise "Kate" Stauffer in 1869 until her death in 1893. Together, they had seven children, including Charles Walker Clark and William Andrews Clark Jr. After Kate's death in 1893, William married his second wife, the woman who had been his teenage ward, Anna Eugenia La Chapelle (March 10, 1878, Michigan – October 11, 1963, New York). They claimed to have been married in 1901 in France. Anna
14040-427: The same year ten Republican senators who were opposed to reform were forced out of their seats, acting as a "wake-up call to the Senate". Reformers included William Jennings Bryan , while opponents counted respected figures such as Elihu Root and George Frisbie Hoar among their number; Root cared so strongly about the issue that after the passage of the Seventeenth Amendment he refused to stand for re‑election to
14175-446: The shafts could no longer be pumped dry with the available technology. Although an increased use of banknotes , credit and copper coins during this period did decrease the value of, and dependence on, precious metals , gold and silver still remained vital to the story of medieval mining. Due to differences in the social structure of society, the increasing extraction of mineral deposits spread from central Europe to England in
14310-558: The silver mines of Laurium , which helped support the Greek city state of Athens . Although they had over 20,000 slaves working them, their technology was essentially identical to their Bronze Age predecessors. At other mines, such as on the island of Thassos , marble was quarried by the Parians after they arrived in the 7th century BC. The marble was shipped away and was later found by archaeologists to have been used in buildings including
14445-479: The state and national level had pledged some form of direct election, and 33 states had introduced the use of direct primaries. Twenty-seven states had called for a constitutional convention on the subject, with 31 states needed to reach the threshold; Arizona and New Mexico each achieved statehood that year (bringing the total number of states to 48), and were expected to support the motion. Alabama and Wyoming , already states, had passed resolutions in favor of
14580-415: The state legislatures to gain election to the Senate. A few state legislatures began to petition the Congress for direct election of senators. By 1893, the House had the two-thirds vote for just such an amendment. However, when the joint resolution reached the Senate, it failed from neglect, as it did again in 1900, 1904 and 1908; each time the House approved the appropriate resolution, and each time it died in
14715-581: The states both direct and indirect representation in the federal government. The Senate was part of a formal bicameralism , with the members of the Senate and House responsible to completely distinct constituencies; this helped defeat the problem of the federal government being subject to "special interests". Members of the Constitutional Convention considered the Senate to be parallel to the British House of Lords as an "upper house", containing
14850-474: The surface through the tunnels and shafts. Sub-surface mining can be classified by the type of access shafts used, and the extraction method or the technique used to reach the mineral deposit. Drift mining uses horizontal access tunnels, slope mining uses diagonally sloping access shafts, and shaft mining uses vertical access shafts. Mining in hard and soft rock formations requires different techniques. Other methods include shrinkage stope mining , which
14985-407: The system relied on their ability to agree. Some states could not, and thus delayed sending senators to Congress; in a few cases, the system broke down to the point where states completely lacked representation in the Senate. Deadlocks started to become an issue in the 1850s, with a deadlocked Indiana legislature allowing a Senate seat to sit vacant for two years. The tipping point came in 1865 with
15120-590: The tomb of Amphipolis. Philip II of Macedon , the father of Alexander the Great , captured the gold mines of Mount Pangeo in 357 BC to fund his military campaigns. He also captured gold mines in Thrace for minting coinage, eventually producing 26 tons per year. However, it was the Romans who developed large-scale mining methods, especially the use of large volumes of water brought to the minehead by numerous aqueducts . The water
15255-448: The top of a mountain off to reach ore deposits at depth. Most placer deposits, because they are shallowly buried, are mined by surface methods. Finally, landfill mining involves sites where landfills are excavated and processed. Landfill mining has been thought of as a long-term solution to methane emissions and local pollution. High wall mining, which evolved from auger mining, is another form of surface mining. In high wall mining,
15390-614: The top slats. Many examples of such devices have been found in old Roman mines and some examples are now preserved in the British Museum and the National Museum of Wales . Mining as an industry underwent dramatic changes in medieval Europe . The mining industry in the early Middle Ages was mainly focused on the extraction of copper and iron . Other precious metals were also used, mainly for gilding or coinage. Initially, many metals were obtained through open-pit mining , and ore
15525-461: 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 the iron ore mines at Iron Knob . After declines in production, another boom in mining occurred in the 1960s. In the early 21st century, Australia remains a major world mineral producer. As
15660-468: The world, which was increasingly demanding copper for electrical and household goods. Canada's mining industry grew more slowly than did 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
15795-610: Was 23 and William was 62. They had two children: In early 1946, Anna commissioned the Paganini Quartet , and acquired the four famous Stradivarius instruments once owned by Niccolo Paganini for their use. Clark donated 135 acres to the Girl Scouts in honor of his elder daughter (by his second wife), Louise Amelia Andrée (who died at age 16 of meningitis ), who had been very happy there. The Girl Scout camp in Briarcliff Manor
15930-418: Was common. For example, rural counties and cities could be given "equal weight" in the state legislatures, enabling one rural vote to equal 200 city votes. The malapportioned state legislatures would have given the Republicans control of the Senate in the 1916 Senate elections . With direct election, each vote represented equally, the Democrats held their stronghold in the South and offset net Republican gains in
16065-612: Was mined in pre-Columbian America; in the Cerillos Mining District in New Mexico , an estimate of "about 15,000 tons of rock had been removed from Mt. Chalchihuitl using stone tools before 1700." In 1727 Louis Denys (Denis) (1675–1741), sieur de La Ronde – brother of Simon-Pierre Denys de Bonaventure and the son-in-law of René Chartier – took command of Fort La Pointe at Chequamegon Bay ; where natives informed him of an island of copper. La Ronde obtained permission from
16200-800: Was named Camp Andree Clark . Clark's son, William Andrews Clark Jr., founder of the Los Angeles Philharmonic in 1919, left his library of rare books and manuscripts to the regents of the University of California, Los Angeles . Today, the William Andrews Clark Memorial Library specializes in English literature and history from 1641 to 1800, materials related to Oscar Wilde and his associates, and fine printing . Huguette (pronounced oo- GETT ), born in Paris, France in June 1906,
16335-587: Was not a serious issue. Deadlocks were a problem, but they were the exception rather than the norm; many legislatures did not deadlock over elections at all. Most of those that did in the 19th century were the newly admitted western states, which suffered from "inexperienced legislatures and weak party discipline ... as western legislatures gained experience, deadlocks became less frequent." While Utah suffered from deadlocks in 1897 and 1899, they became what Zywicki refers to as "a good teaching experience", and Utah never again failed to elect senators. Another concern
16470-450: Was one of the largest cities in the West. He became a hero in Helena, Montana , by campaigning for its selection as the state capital instead of Anaconda . This battle for the placement of the capital had subtle Irish vs. English, Catholic vs. Protestant, and non-Masonic vs. Masonic elements. Clark's long-standing dream of becoming a United States senator resulted in scandal in 1899 when it
16605-576: Was primarily extracted from shallow depths, rather than through deep mine shafts. Around the 14th century , the growing use of weapons , armour , stirrups , and horseshoes greatly increased the demand for iron. Medieval knights , for example, were often laden with up to 100 pounds (45 kg) of plate or chain link armour in addition to swords , lances and other weapons. The overwhelming dependency on iron for military purposes spurred iron production and extraction processes. The silver crisis of 1465 occurred when all mines had reached depths at which
16740-497: Was ratified by: The Utah legislature rejected the amendment on February 26, 1913. No action on the amendment has been completed by Florida , Georgia , Kentucky , Mississippi , South Carolina , or Virginia . Alaska and Hawaii were not yet states at the time of the amendment's proposal, and therefore ratified the amendment along with the rest of the Constitution as part of joining the Union in 1959. The Seventeenth Amendment altered
16875-701: Was rescued by the RMS Carpathia , and arrived in New York City a widow. Some of Mr. Clark's personal items were retrieved in the debris field during an expedition to the site of the sinking in 1994. They were identified by engraved initials. They included shaving soap, toiletry items, cuff links, and gambling chips. Clark's art collection was donated to the Corcoran Gallery in Washington, D.C. after his death, greatly enriching that museum's holdings of European as well as American art. The Clark donation also included
17010-609: Was revealed that he bribed members of the Montana State Legislature in return for their votes. At the time, U.S. senators were chosen by their respective state legislatures. The corruption of his election contributed to the passage of the Seventeenth Amendment . The U.S. Senate refused to seat Clark because of the 1899 bribery scheme, but a later senate campaign was successful, and he served a single term from 1901 until 1907. In responding to criticism of his bribery of
17145-433: Was seen as an anachronism that was out of step with the wishes of the American people, and one that had led to the Senate becoming "a sort of aristocratic body—too far removed from the people, beyond their reach, and with no special interest in their welfare". The settlement of the West and continuing absorption of hundreds of thousands of immigrants expanded the sense of "the people". Hoar replied that "the people" were both
17280-406: Was still present near the surface in colonial times. Indigenous peoples used Lake Superior copper from at least 5,000 years ago; copper tools, arrowheads, and other artifacts that were part of an extensive native trade-network have been discovered. In addition, obsidian , flint , and other minerals were mined, worked, and traded. Early French explorers who encountered the sites made no use of
17415-499: Was that when deadlocks occurred, state legislatures were unable to conduct their other normal business; James Christian Ure, writing in the South Texas Law Review , notes that this did not in fact occur. In a deadlock situation, state legislatures would deal with the matter by holding "one vote at the beginning of the day—then the legislators would continue with their normal affairs". Eventually, legislative elections held in
17550-411: Was the removal of water from mining shafts. As miners dug deeper to access new veins, flooding became a very real obstacle. The mining industry became dramatically more efficient and prosperous with the invention of mechanically- and animal-driven pumps. Iron metallurgy in Africa dates back over four thousand years. Gold became an important commodity for Africa during the trans-Saharan gold trade from
17685-423: Was the youngest child of Clark with his second wife, Anna Eugenia La Chapelle. She married once but divorced less than a year later. She led a reclusive life thereafter, seldom communicating with the public nor with her extended family. For many years, she lived in three combined apartments, with a total of 42 rooms, on New York's Fifth Avenue at 72nd Street, overlooking Central Park . In 1991, she moved out and for
17820-404: Was then adopted by a vote of 64 to 24, with four not voting. Nearly a year later, the House accepted the change. The conference report that would become the Seventeenth Amendment was approved by the Senate in a 42 to 36 vote on April 12, 1912, and by the House 238 to 39, with 110 not voting on May 13, 1912. Having been passed by Congress, the amendment was sent to the states for ratification and
17955-403: Was used for a variety of purposes, including removing overburden and rock debris, called hydraulic mining , as well as washing comminuted , or crushed, ores and driving simple machinery. The Romans used hydraulic mining methods on a large scale to prospect for the veins of ore, especially using a now-obsolete form of mining known as hushing . They built numerous aqueducts to supply water to
18090-461: Was used. At other parts of the site, they penetrated the water table and dewatered the mines using several kinds of machines, especially reverse overshot water-wheels . These were used extensively in the copper mines at Rio Tinto in Spain, where one sequence comprised 16 such wheels arranged in pairs, and lifting water about 24 metres (79 ft). They were worked as treadmills with miners standing on
18225-539: Was usually the gold ( placer and then lode ) and then silver that were taken into possession and extracted first. Other metals would often wait for railroads or canals, as coarse gold dust and nuggets do not require smelting and are easy to identify and transport. In the early 20th century, the gold and silver rush to the western United States also stimulated mining for coal as well as base metals such as copper, lead, and iron. Areas in modern Montana, Utah, Arizona, and later Alaska became predominant suppliers of copper to
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