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Arthur De Wint Foote
Arthur De Wint Foote (1849–1933) was an American civil engineer and mining engineer who impacted the development of the American West with his innovative engineering works and entrepreneurial ventures. In Northern California in the late 1890s, he designed and built the North Star Mine Powerhouse, the highest capacity impulse-turbine power-plant of the time, and now a California historic landmark; within that plant he designed and installed the then-largest Pelton wheel turbine. Later, he designed and built Foote's Crossing, a high bridge, and Foote's Crossing Road, both now memorialized as California and U.S. landmarks. Early years Born in Guilford, Connecticut, Foote's ancestry was English—from Yorkshire before 1630. After preparatory schooling as a youth, he attended Yale College's Sheffield Scientific School, but left in 1868 before graduating. From there he began his early career in business and construction ventures along the eastern seaboard of the US and in the We ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Guilford, Connecticut
Guilford is a town in New Haven County, Connecticut, United States, that borders Madison, Branford, North Branford and Durham, and is situated on I-95 and the Connecticut seacoast. The population was 22,073 at the 2020 census. History Guilford was named after the town of Guildford, in England, the native home of a share of its first settlers. In early maps of the Connecticut Colony, the town is seen on several maps as Gilford. First settled by Europeans in 1639 after a treaty with the “Sachem Squaw” Shaumpishuh. Guilford is considered by some to have the third largest collection of historic homes in New England, with important buildings from the 17th, 18th, and 19th centuries. There are five historic house museums, including Dudley Farm and the Henry Whitfield House (1639), the oldest dwelling house in Connecticut and the oldest stone house built by English settlers in North America. The Comfort Starr House (1695) is one of the oldest wooden framed private dwellings in C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydraulic Mining
Hydraulic mining is a form of mining that uses high-pressure jets of water to dislodge rock material or move sediment.Paul W. Thrush, ''A Dictionary of Mining, Mineral, and Related Terms'', US Bureau of Mines, 1968, p.560. In the placer mining of gold or tin, the resulting water-sediment slurry is directed through sluice boxes to remove the gold. It is also used in mining kaolin and coal. Hydraulic mining developed from ancient Roman techniques that used water to excavate soft underground deposits. Its modern form, using pressurized water jets produced by a nozzle called a "monitor", came about in the 1850s during the California Gold Rush in the United States. Though successful in extracting gold-rich minerals, the widespread use of the process resulted in extensive environmental damage, such as increased flooding and erosion, and sediment blocking waterways and covering farm fields. These problems led to its legal regulation. Hydraulic mining has been used in various forms aroun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The New York Times
''The New York Times'' (''the Times'', ''NYT'', or the Gray Lady) is a daily newspaper based in New York City with a worldwide readership reported in 2020 to comprise a declining 840,000 paid print subscribers, and a growing 6 million paid digital subscribers. It also is a producer of popular podcasts such as '' The Daily''. Founded in 1851 by Henry Jarvis Raymond and George Jones, it was initially published by Raymond, Jones & Company. The ''Times'' has won 132 Pulitzer Prizes, the most of any newspaper, and has long been regarded as a national " newspaper of record". For print it is ranked 18th in the world by circulation and 3rd in the U.S. The paper is owned by the New York Times Company, which is publicly traded. It has been governed by the Sulzberger family since 1896, through a dual-class share structure after its shares became publicly traded. A. G. Sulzberger, the paper's publisher and the company's chairman, is the fifth generation of the family to head the pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Colorado Silver Boom
The Colorado Silver Boom was a dramatic expansionist period of silver mining activity in the U.S. state of Colorado in the late 19th century. The boom started in 1879 with the discovery of silver at Leadville. 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 authorized by Congress 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.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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leadville, Colorado
The City of 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, Lake County, Colorado, United States. The city population was 2,602 at the 2010 United States Census, 2010 census and an estimated 2,762 in 2018. It is situated at an elevation of . Leadville is the highest United States Cities and Towns above 10,000 feet, incorporated city in the United States and it is surrounded by two of the tallest Fourteener, 14,000 foot peaks in the state. Leadville is a former silver mining town that lies among the headwaters of the Arkansas River within the Rocky Mountains. The Leadville Historic District, designated a National Historic Landmark in 1961, contains many historic structures and sites of Leadville's mining era. In the late 19th century, Leadville was the second most populous city in Colorado, after ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Homestake Mine (South Dakota)
The Homestake Mine was a deep underground gold mine (8,000 feet or 2,438 m) located in Lead, South Dakota. Until it closed in 2002 it was the largest and deepest gold mine in North America. The mine produced more than of gold during its lifetime. This is about or a volume of gold roughly equal to 18,677 US gallons. The Homestake Mine is famous in scientific circles because of the work of a deep underground laboratory that was established there in the mid-1960s. This was the site where the solar neutrino problem was first discovered, in what is known as the Homestake Experiment. Raymond Davis Jr. conducted this experiment in the mid-1960s, which was the first to observe solar neutrinos. On July 10, 2007, the mine was selected by the National Science Foundation as the location for the Deep Underground Science and Engineering Laboratory (DUSEL). It won over several candidates, including the Henderson Mine near Empire, Colorado. History The Homestake deposit was discovered by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Deadwood, South Dakota
Deadwood (Lakota: ''Owáyasuta''; "To approve or confirm things") is a city that serves as county seat of Lawrence County, South Dakota, United States. It was named by early settlers after the dead trees found in its gulch. The city had its heyday from 1876 to 1879, after gold deposits had been discovered there, leading to the Black Hills Gold Rush. At its height, the city had a population of 25,000, attracting Old West figures such as Wyatt Earp, Calamity Jane, and Wild Bill Hickok (who was killed there). The population was 1,156 at the 2020 census. The entire town has been designated as a National Historic Landmark District, for its well-preserved Gold Rush-era architecture. Deadwood's proximity to Lead often prompts the two towns being collectively named "Lead-Deadwood". History 19th century The settlement of Deadwood began illegally in the 1870s, on land which had been granted to the Lakota people in the 1868 Treaty of Fort Laramie. The treaty had guaranteed owners ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Santa Clara County, California
Santa Clara County, officially the County of Santa Clara, is the sixth-most populous county in the U.S. state of California, with a population of 1,936,259, as of the 2020 United States Census, 2020 census. Santa Clara County and neighboring San Benito County, California, San Benito County together form the U.S. Census Bureau's San Jose-Sunnyvale-Santa Clara metropolitan statistical area, which is part of the larger San Jose-San Francisco-Oakland, California, Oakland combined statistical area. Santa Clara is the most populous county in the San Francisco Bay Area and in Northern California. The county seat and largest city is San Jose, California, San Jose, the List of United States cities by population, 10th-most populous city in the United States, List of cities and towns in California, California's third-most populous city and the List of cities and towns in the San Francisco Bay Area, most populous city in the San Francisco Bay Area. Home to Silicon Valley, Santa Clara County ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New Almaden
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National Historic Civil Engineering Landmark
__NOTOC__ The following is a list of Historic Civil Engineering Landmarks as designated by the American Society of Civil Engineers since it began the program in 1964. The designation is granted to projects, structures, and sites in the United States (National Historic Civil Engineering Landmarks) and the rest of the world (International Historic Civil Engineering Landmarks). As of 2019, there are over 280 landmarks that have been approved by the ASCE Board of Direction. Sections or chapters of the American Society of Civil Engineers may also designate state or local landmarks within their areas; those landmarks are not listed here. See also *[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Railfan
A railfan, rail buff or train buff (American English), railway enthusiast, railway buff or trainspotter (Australian/British English), or ferroequinologist is a person who is recreationally interested in trains and rail transport systems. Railfans often combine their interest with other hobbies, especially photography and videography, radio scanning, railway modelling, studying railroad history and participating in railway station and rolling stock preservation efforts. There are many magazines and websites dedicated to railfanning and railway enthusiasts, including ''Trains'', ''Railfan & Railroad ''Railfan & Railroad'' is an American monthly magazine that has been in publication since the 1970s. It was the first magazine title established in-house by Carstens Publications. As a magazine dedicated to trains and rail transportation, it stands ...'', ''The Railway Magazine'', ''Locomotive Publishing Company, Locomotive Magazine'', and ''Railway Gazette International''. Other n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Railway Spiral
A spiral (sometimes called a spiral loop or just loop) is a technique employed by railways to ascend steep hills. A railway spiral rises on a steady curve until it has completed a loop, passing over itself as it gains height, allowing the railway to gain vertical elevation in a relatively short horizontal distance. It is an alternative to a zig-zag, and avoids the need for the trains to stop and reverse direction while ascending. If the train is longer than the length of each loop it may be possible to view it looping above itself. The term "loop" is also often used for a railway that curves sharply and goes back on itself: if the railway crosses itself, then it forms a spiral or helix; otherwise, it forms the much more common horseshoe curve or bend. List of spirals Argentina * Two spirals between Tacuara and Meseta at and on the heritage ''Tren a las Nubes'' section of the Salta–Antofagasta railway part of the General Manuel Belgrano Railway. Australia * Spiral on the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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