The Colorado Silver Boom was a dramatic expansionist period of

silver Silver is a chemical element; it has Symbol (chemistry), symbol Ag () and atomic number 47. A soft, whitish-gray, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal. ...

mining Mining is the Resource extraction, 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 agriculture, agricultural processes, or feasib ...

activity in the

U.S. state In the United States, a state is a constituent political entity, of which there are 50. Bound together in a political union, each state holds governmental jurisdiction over a separate and defined geographic territory where it shares its so ...

Colorado Colorado is a U.S. state, state in the Western United States. It is one of the Mountain states, sharing the Four Corners region with Arizona, New Mexico, and Utah. It is also bordered by Wyoming to the north, Nebraska to the northeast, Kansas ...

in the late 19th century. The boom started in 1879 with the discovery of silver at

Leadville Leadville ( ) is a List of municipalities in Colorado#Statutory city, statutory city that is the county seat, the most populous community, and the only List of municipalities in Colorado, incorporated municipality in Lake County, Colorado, Lak ...

. Over 82 million dollars worth of silver was mined during the period, making it the second great mineral boom in the state, and coming 20 years after the earlier and shorter Colorado Gold Rush of 1859. The boom was largely the consequence of large-scale purchases of silver by the

United States Government The Federal Government of the United States of America (U.S. federal government or U.S. government) is the Federation#Federal governments, national government of the United States. The U.S. federal government is composed of three distinct ...

authorized by

Congress A congress is a formal meeting of the representatives of different countries, constituent states, organizations, trade unions, political parties, or other groups. The term originated in Late Middle English to denote an encounter (meeting of ...

in 1878. The boom endured throughout the 1880s, resulting in an intense increase in both the population and wealth of Colorado, especially in the mountains. It came to an end in 1893 in the wake of the collapse of silver prices caused by the repeal of

Sherman Silver Purchase Act The Sherman Silver Purchase Act was a United States federal law enacted on July 14, 1890, which increased the amount of silver the government was required to purchase on a recurrent monthly basis to 4.5 million ounces, roughly the entirety of the ...

.Voynick, S.M., 1992, Colorado Gold, Missoula: Mountain Press Publishing Company, Silver had been discovered in Colorado in the 1860s, with early mining in Clear Creek Canyon at Georgetown in 1864. In the early days, the mineral was overshadowed by gold, and the low price of mineral meant that most mines were not profitable enough to operate. In 1878, responding to pressure from western interests, the United States Congress passed the Bland–Allison Act authorizing the free coinage of silver. The government demand raised the price of the metal to the point where many additional mines were profitable. The discovery of the Leadville district the following year resulted in a flood of new immigrant prospectors to many of the same mountain gullies that had been the site of the gold rush. The resulting opulence was most lavish in Leadville itself. The repeal of the Sherman Act in 1893 conversely led to a collapse of silver prices, bringing an end to the boom as. Beginning in 1889,

Creede, Colorado Creede is a List of municipalities in Colorado#Statutory town, Statutory Town and the county seat of Mineral County, Colorado, Mineral County, Colorado, United States. It is the most populous community and the only List of municipalities in Colo ...

was the site of another big silver boom. The first discovery was made at the Alpha mine in 1869, but the silver could not be extracted at a profit from the complex ores. The great “Boom Days” started with the discovery of rich minerals in Willow Creek Canyon. The town leapt from a population of 600 in 1889 to more than 10,000 people in December 1891. The mines operated continuously until 1995. Creede was the last silver boom town in Colorado in the 19th century. The boom continued unabated throughout the 1880s and early 1890s, years that gave the state many of the historic structures in its cities and towns. The boom also drove many extensions of the railway network in the mountains, including such lines as the Denver, South Park and Pacific, which built an early

narrow-gauge A narrow-gauge railway (narrow-gauge railroad in the US) is a railway with a track gauge (distance between the rails) narrower than . Most narrow-gauge railways are between and . Since narrow-gauge railways are usually built with tighter curv ...

line to Leadville. Likewise the extension of the railroad network up the

Roaring Fork Valley The Roaring Fork Valley is a geographical region in western Colorado in the United States. The Roaring Fork Valley is one of the most affluent regions in Colorado and the U.S. as well as one of the most populous and economically vital areas of th ...

to the previously failed mining town of

Aspen Aspen is a common name for certain tree species in the Populus sect. Populus, of the ''Populus'' (poplar) genus. Species These species are called aspens: * ''Populus adenopoda'' – Chinese aspen (China, south of ''P. tremula'') * ''Populus da ...

in the late 1880s made the extraction of silver ore there economically feasible, and saved the town from near extinction. The government purchases of silver were subsequently nearly doubled by the 1890 Sherman Silver Purchase Act, further extending the boom into the early 1890s. The repeal of the act in 1893 resulted in a collapse of silver prices, bringing about an end to the boom. After 1893, many mining camps became

ghost town A ghost town, deserted city, extinct town, or abandoned city is an abandoned settlement, usually one that contains substantial visible remaining buildings and infrastructure such as roads. A town often becomes a ghost town because the economi ...

s. The accompanying collapse in statewide economic activity was ameliorated somewhat by the simultaneous emergence of agriculture, previously derided as not feasible, as a large component of the state economy. The working conditions inside the mines were often very dangerous.

Silicosis Silicosis is a form of occupational lung disease caused by inhalation of crystalline silica dust. It is marked by inflammation and scarring in the form of Nodule (medicine), nodular lesions in the upper lobes of the lungs. It is a type of pneum ...

, which at the time was incurable, ruined miners' lungs quickly. Many other hazards existed. Apart from the lanterns or tallow candles the miners carried, the mines were otherwise completely dark. Miners at the time were also subject to the threat of tunnel collapse, flooding, and the lack of oxygen in the deeper areas of the mines. Often the miners brought caged canaries down with them; when the bird passed out, it indicated that the oxygen levels were dangerously low in the area. Mines were commonly very small and tightly spaced to save on the cost, effort, and time it would take to expand the tunnels, and so resulted in the use of people of smaller stature and even children.

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