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Liberty Tunnels
The Liberty Tunnels (also known as the Liberty Tubes) are a pair of tunnels located in Pittsburgh, Pennsylvania, United States that allow motorists to travel between the South Hills of Pittsburgh and the city, beneath Mt. Washington. The tunnels were vital in the expansion of the South Hills suburbs by providing a direct route to the city, eliminating the time-consuming task of navigating around or over Mt. Washington and its inclines. Opening in 1924, the Liberty Tunnels are the longest automobile tunnel in the City of Pittsburgh. Design The tunnels were designed by Amos D. Neeld, who would also supervise the construction of the adjoining Liberty Bridge, which gives travelers a way to cross the Monongahela River The Monongahela River ( , ), sometimes referred to locally as the Mon (), is a U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map accessed August 15, 2011 river on the Allegheny Plateau in nor ... after passi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Washington, Pittsburgh (mountain)
Mount Washington is a hill in Pittsburgh, on the southern banks of the Monongahela River and Ohio River. History In the early history of Pittsburgh, Mount Washington was known as Coal Hill, but Coal Hill was actually on the south bank of the Monongahela River. Easy access to the Pittsburgh coal seam's outcrop near the base of Mount Washington allowed several mines to operate there. Also, rock was quarried from the hill. Gray sandstone, for example, was quarried at Coal Hill for the second Allegheny County Courthouse. By 1876, the name had been changed to Mount Washington, and a year later, the view of the City of Pittsburgh was first drawn from Mount Washington. Many photos of the Pittsburgh skyline are from Mount Washington, due to the elevation of the hill overlooking the river valley and Downtown Pittsburgh below. Inclines The original switchback trails that wound up the steep slopes of Mount Washington were barely passable to a team of horses pulling a loaded ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saw Mill Run
Saw Mill Run is a tributary of the Ohio River in Pennsylvania. It is an urban stream, and lies entirely within Allegheny County, Pennsylvania. The stream enters the Ohio just downstream from the Forks of the Ohio in Pittsburgh, at a place that was founded as the town of Temperanceville in the 1830s. It provides an entry through the elevated plateau south of Pittsburgh known as the South Hills, and land transportation has paralleled the stream since the nineteenth century. The stream is named for an actual saw mill that operated near the mouth of the stream where it empties into the Ohio River. The first reference to the mill is in relation to the construction of Fort Pitt (1759–1761). The mill provided much of the lumber used in the construction of the new Fort, after the British claimed the area from the French and destroyed Fort Duquesne. Railroads The Coal Hill Coal Railroad crossed the stream on a trestle, and extended upstream in 1861. This railroad was purchase ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tunnels Completed In 1924
A tunnel is an underground or undersea passageway. It is dug through surrounding soil, earth or rock, or laid under water, and is usually completely enclosed except for the two portals common at each end, though there may be access and ventilation openings at various points along the length. A pipeline differs significantly from a tunnel, though some recent tunnels have used immersed tube construction techniques rather than traditional tunnel boring methods. A tunnel may be for foot or vehicular road traffic, for rail traffic, or for a canal. The central portions of a rapid transit network are usually in the tunnel. Some tunnels are used as sewers or aqueducts to supply water for consumption or for hydroelectric stations. Utility tunnels are used for routing steam, chilled water, electrical power or telecommunication cables, as well as connecting buildings for convenient passage of people and equipment.Salazar, Waneta. ''Tunnels in Civil Engineering''. Delhi, India : Wh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Road Tunnels In Pennsylvania
A road is a thoroughfare used primarily for movement of traffic. Roads differ from streets, whose primary use is local access. They also differ from stroads, which combine the features of streets and roads. Most modern roads are paved. The words "road" and "street" are commonly considered to be interchangeable, but the distinction is important in urban design. There are many types of roads, including parkways, avenues, controlled-access highways (freeways, motorways, and expressways), tollways, interstates, highways, and local roads. The primary features of roads include lanes, sidewalks (pavement), roadways (carriageways), medians, shoulders, verges, bike paths (cycle paths), and shared-use paths. Definitions Historically, many roads were simply recognizable routes without any formal construction or some maintenance. The Organization for Economic Co-operation and Development (OECD) defines a road as "a line of communication (travelled way) using a stabilized base other ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pittsburgh History & Landmarks Foundation Historic Landmarks
Pittsburgh ( ) is a city in Allegheny County, Pennsylvania, United States, and its county seat. It is the second-most populous city in Pennsylvania (after Philadelphia) and the 67th-most populous city in the U.S., with a population of 302,971 as of the 2020 census. The city is located in southwestern Pennsylvania at the confluence of the Allegheny River and Monongahela River, which combine to form the Ohio River. It anchors the Pittsburgh metropolitan area, which had a population of 2.457 million residents and is the largest metro area in both the Ohio Valley and Appalachia, the second-largest in Pennsylvania, and the 26th-largest in the U.S. Pittsburgh is the principal city of the greater Pittsburgh–Weirton–Steubenville combined statistical area which includes parts of Ohio and West Virginia. Pittsburgh is known as "the Steel City" for its dominant role in the history of the U.S. steel industry. It developed as a vital link of the Atlantic coast and Midwest, as t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Los Angeles Times
The ''Los Angeles Times'' is an American Newspaper#Daily, daily newspaper that began publishing in Los Angeles, California, in 1881. Based in the Greater Los Angeles city of El Segundo, California, El Segundo since 2018, it is the List of newspapers in the United States, sixth-largest newspaper in the U.S. and the largest in the Western United States with a print circulation of 118,760. It has 500,000 online subscribers, the fifth-largest among U.S. newspapers. Owned by Patrick Soon-Shiong and published by California Times, the paper has won over 40 Pulitzer Prizes since its founding. In the 19th century, the paper developed a reputation for civic boosterism and opposition to Trade union, labor unions, the latter of which led to the Los Angeles Times bombing, bombing of its headquarters in 1910. The paper's profile grew substantially in the 1960s under publisher Otis Chandler, who adopted a more national focus. As with other regional newspapers in California and the United Sta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Liberty Tunnel 1974
Liberty is the state of being free within society from oppressive restrictions imposed by authority on one's way of life, behavior, or political views. The concept of liberty can vary depending on perspective and context. In the Constitutional law of the United States, ordered liberty means creating a balanced society where individuals have the freedom to act without unnecessary interference (negative liberty) and access to opportunities and resources to pursue their goals (positive liberty), all within a fair legal system. Sometimes liberty is differentiated from freedom by using the word "freedom" primarily, if not exclusively, to mean the ability to do as one wills and what one has the power to do; and using the word "liberty" to mean the absence of arbitrary restraints, taking into account the rights of all involved. In this sense, the exercise of liberty is subject to capability and limited by the rights of others. Thus liberty entails the responsible use of freedom under t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Bureau Of Mines
The United States Bureau of Mines (USBM) was the primary Federal government of the United States, United States government agency in the 20th century that conducted scientific research and disseminated information on the extraction, processing, use, and conservation of mineral natural resource, resources. The Bureau was abolished in 1996. History The U.S. Bureau of Mines was established in the United States Department of the Interior, U.S. States Department of the Interior on May 16, 1910, pursuant to the Organic Act (Public Law 179), to deal with a wave of catastrophic Mining, mine disasters. The Bureau's mission was gradually expanded to include: * The conduct of research to enhance the safety, health, and environmental impact of mining and processing of minerals and materials. * The collection, analysis, and dissemination of information about mining and processing of more than 100 mineral commodities across the Nation and in more than 185 countries around the world. * Analy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Liberty Tunnel Ventilation Plant
Liberty is the state of being free within society from oppressive restrictions imposed by authority on one's way of life, behavior, or political views. The concept of liberty can vary depending on perspective and context. In the Constitutional law of the United States, ordered liberty means creating a balanced society where individuals have the freedom to act without unnecessary interference (negative liberty) and access to opportunities and resources to pursue their goals (positive liberty), all within a fair legal system. Sometimes liberty is differentiated from freedom by using the word "freedom" primarily, if not exclusively, to mean the ability to do as one wills and what one has the power to do; and using the word "liberty" to mean the absence of arbitrary restraints, taking into account the rights of all involved. In this sense, the exercise of liberty is subject to capability and limited by the rights of others. Thus liberty entails the responsible use of freedom under t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Booth And Flinn
Booth and Flinn (1876–1950) was one of the largest American general contracting companies of its era. It was established during the nineteenth century and was headquartered in Pittsburgh, Pennsylvania, United States. History Founded by William Flinn (1851–1924) as a sole proprietorship in 1876, Booth and Flinn merged with a similar venture in 1881 that was directed by James J. Booth. The business later operated under the name of Booth and Flinn, Ltd. and finally as Booth and Flinn Company. The firm's origins were entwined with the Republican Party machine of the political bosses Flinn and Christopher Magee (1848–1901), his partner in politics, that controlled the city of Pittsburgh for the final twenty years of the 19th century. As a result of politics and a "lowest responsible bidder" scheme, Booth and Flinn won most large construction and paving contracts in Pittsburgh and Western Pennsylvania, where they built streets, trolley lines, and bridges, usually amid charge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dormont, Pennsylvania
Dormont is a borough in Allegheny County, Pennsylvania, United States. The population was 8,244 at the 2020 census. It is a residential suburb of the Pittsburgh metropolitan area. Loosely translated, Dormont means "Mountain of Gold" in French. History The territory in which Dormont Borough is situated was held by the Delaware and Shawnee tribes until 1768, when the territory was part of the transaction in which Fort Stanwix was purchased from the Six Nations. In following years, Dormont's area was part of Cumberland County, Pitt Township in Bedford County, Penn Township in Washington County, and finally, St. Clair Township in Allegheny County in 1788. Dormont was originally fashioned from parts of Scott and Union Townships. An order of incorporation was signed on March 31, 1909, making Dormont the first independent municipality in the South Hills of Allegheny County. Municipal officials initially wanted to name the new community "Mt. Lebanon"; however, objections were ra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pittsburgh
Pittsburgh ( ) is a city in Allegheny County, Pennsylvania, United States, and its county seat. It is the List of municipalities in Pennsylvania#Municipalities, second-most populous city in Pennsylvania (after Philadelphia) and the List of United States cities by population, 67th-most populous city in the U.S., with a population of 302,971 as of the 2020 United States census, 2020 census. The city is located in Western Pennsylvania, southwestern Pennsylvania at the confluence of the Allegheny River and Monongahela River, which combine to form the Ohio River. It anchors the Greater Pittsburgh, Pittsburgh metropolitan area, which had a population of 2.457 million residents and is the largest metro area in both the Ohio Valley and Appalachia, the Pennsylvania metropolitan areas, second-largest in Pennsylvania, and the List of metropolitan statistical areas, 26th-largest in the U.S. Pittsburgh is the principal city of the greater Pittsburgh–New Castle–Weirton combined statistic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
