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Pope's Creek Subdivision
The Pope's Creek Subdivision is a CSX Transportation railroad line in Maryland, running from Bowie to Morgantown where the Morgantown Generating Station is located and the Chalk Point Generating Station. History The Pope's Creek Subdivision was originally built by the Baltimore and Potomac Railroad. The company was organized on December 19, 1858, and began surveying the route May 3, 1859. Construction started in 1861 but progressed slowly until 1867, when the Pennsylvania Railroad (PRR) and its ally, the Northern Central Railway (NCRY), bought the company. The PRR at the time had access to Baltimore via its own lines: the NCRY from the north and the Philadelphia, Wilmington and Baltimore Railroad from the northeast. However, it used the Baltimore and Ohio Railroad (B&O) and its Washington Branch to continue southwest to Washington, D.C. The PRR and B&O were rivals, and the Maryland General Assembly refused to grant a charter to end the B&O's monopoly on Baltimore-Washington ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2008 01 16 - Rail Lines Beneath MD 564 In Old Bowie 4
8 (eight) is the natural number following 7 and preceding 9. In mathematics 8 is: * a composite number, its proper divisors being , , and . It is twice 4 or four times 2. * a power of two, being 2 (two cubed), and is the first number of the form , being an integer greater than 1. * the first number which is neither prime nor semiprime. * the base of the octal number system, which is mostly used with computers. In octal, one digit represents three bits. In modern computers, a byte is a grouping of eight bits, also called an wikt:octet, octet. * a Fibonacci number, being plus . The next Fibonacci number is . 8 is the only positive Fibonacci number, aside from 1, that is a perfect cube. * the only nonzero perfect power that is one less than another perfect power, by Catalan conjecture, Mihăilescu's Theorem. * the order of the smallest non-abelian group all of whose subgroups are normal. * the dimension of the octonions and is the highest possible dimension of a normed divisio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monopoly
A monopoly (from Greek language, Greek el, μόνος, mónos, single, alone, label=none and el, πωλεῖν, pōleîn, to sell, label=none), as described by Irving Fisher, is a market with the "absence of competition", creating a situation where a specific person or company, enterprise is the only supplier of a particular thing. This contrasts with a monopsony which relates to a single entity's control of a Market (economics), market to purchase a good or service, and with oligopoly and duopoly which consists of a few sellers dominating a market. Monopolies are thus characterized by a lack of economic Competition (economics), competition to produce the good (economics), good or Service (economics), service, a lack of viable substitute goods, and the possibility of a high monopoly price well above the seller's marginal cost that leads to a high monopoly profit. The verb ''monopolise'' or ''monopolize'' refers to the ''process'' by which a company gains the ability to raise ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coal
Coal is a combustible black or brownish-black sedimentary rock, formed as rock strata called coal seams. Coal is mostly carbon with variable amounts of other elements, chiefly hydrogen, sulfur, oxygen, and nitrogen. Coal is formed when dead plant matter decays into peat and is converted into coal by the heat and pressure of deep burial over millions of years. Vast deposits of coal originate in former wetlands called coal forests that covered much of the Earth's tropical land areas during the late Carboniferous ( Pennsylvanian) and Permian times. Many significant coal deposits are younger than this and originate from the Mesozoic and Cenozoic eras. Coal is used primarily as a fuel. While coal has been known and used for thousands of years, its usage was limited until the Industrial Revolution. With the invention of the steam engine, coal consumption increased. In 2020, coal supplied about a quarter of the world's primary energy and over a third of its electricity. Some iron ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brandywine, Maryland
Brandywine is the name of an unincorporated area in Prince George's County, Maryland, United States, that refers both to a census-designated place (CDP) and a zip code area which is much larger (20613), whose areas overlap. The population of Brandywine at the 2020 U.S. Census was 10,550 for the CDP, and the population of ZIP code 20613 was 11,860 in 2010. Brandywine is in the southernmost area of Prince George’s County, surrounded by a rural setting. It is in the Southern Maryland region. Brandywine is also a suburb of two cities: it lies within the outer suburban Washington D.C. area and is also a close suburb of Waldorf. Geography The CDP and town are adjacent to the southern border of Prince George's County, lying east and west of busy Maryland Route 5/ U.S. Route 301, which merge at Brandywine. Brandywine CDP is bordered by Accokeek to the west, Clinton and Rosaryville to the north, Croom to the northeast, and Cedarville to the southeast, all in Prince George's County ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Upper Marlboro, Maryland
Upper Marlboro, officially the Town of Upper Marlboro, is the seat of Prince George's County, Maryland. Aso of the 2020 census, the population was 652. although Greater Upper Marlboro is many times larger. Etymology Upper Marlboro was established in 1706 as "Marlborough Town", after John Churchill, 1st Duke of Marlborough. In 1744, the town was renamed to "Upper Marlborough". In the late 19th century, the town's name changed from Upper Marlborough to Upper Marlboro. The name change is linked to a postal clerk who felt that the last three letters, "ugh", did not properly fit on the rubber stamps being used at the time. By 1893, postal guides were referring to the town as Upper Marlboro and the name stuck, despite a proposed ballot to have it changed back in 1968. History The area of Upper Marlboro was first settled around 1695. It was named after John Churchill, 1st Duke of Marlborough, an ancestor of Winston Churchill. The land, which was to become the town, was part of sev ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Collington, Maryland
Collington is a now defunct settlement in Prince George's County, Maryland, United States, dating from colonial times. Collington has been subsumed by the city of Bowie. Geography Collington is located at 38°58'6" North, 76°45'35" West (38.9684441 -76.7596914). Collington stretched from the area near Holy Trinity Episcopal Church on MD 450 East toward the Belair Mansion, south to where MD 197, also called Collington Road, ends at US 301 and west past Church Road. History Originally referred to as "Collington Hundreds", the settlement was more recently known as "Collington". One of the earliest references to Collington, is in the proceedings of the Council of Maryland from 1696: Significant historic buildings in Collington In 1746, Colonial Governor of Maryland, Samuel Ogle built the Belair Mansion and Belair stables, in Collington, establishing his residence and the Belair Stud Farm. Baruch Duckett built Fairview Plantation around 1800 in Collington. Maryland Governor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Siding (rail)
A siding, in rail terminology, is a low-speed track section distinct from a running line or through route such as a main line, branch line, or spur. It may connect to through track or to other sidings at either end. Sidings often have lighter rails, meant for lower speed or less heavy traffic, and few, if any, signals. Sidings connected at both ends to a running line are commonly known as loops; those not so connected may be referred to as single-ended or dead-end sidings, or (if short) stubs. Functions Sidings may be used for marshalling (classifying), stabling, storing, loading, and unloading vehicles. Common sidings store stationary rolling stock, especially for loading and unloading. Industrial sidings (also known as spurs) go to factories, mines, quarries, wharves, warehouses, some of them are essentially links to industrial railways. Such sidings can sometimes be found at stations for public use; in American usage these are referred to as team tracks (after the use ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Single Track (rail)
A single-track railway is a railway where trains traveling in both directions share the same track. Single track is usually found on lesser-used rail lines, often branch lines, where the level of traffic is not high enough to justify the cost of constructing and maintaining a second track. Advantages and disadvantages Single track is significantly cheaper to build and maintain, but has operational and safety disadvantages. For example, a single-track line that takes 15 minutes to travel through would have capacity for only two trains per hour in each direction safely. By contrast, a double track with signal boxes four minutes apart can allow up to 15 trains per hour in each direction safely, provided all the trains travel at the same speed. This hindrance on the capacity of a single track may be partly overcome by making the track one-way on alternate days, if the single track is not used for public passenger transit. Long freight trains are a problem if the passing s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cab Car
A control car, cab car (North America), control trailer, or driving trailer (UK and Ireland) is a non-powered rail vehicle from which a train can be operated. As dedicated vehicles or regular passenger cars, they have one or two driver compartments with all the controls and gauges required to remotely operate the locomotive, including exterior locomotive equipment such as horns, bells, ploughs, and lights. They also have communications and safety systems such as GSM-R or European Train Control System (ETCS). Control cars enable push-pull operation when located on the end of a train opposite its locomotive by allowing the train to reverse direction at a terminus without moving the locomotive or turning the train around. Control cars can carry passengers, baggage, and mail, and may, when used together with diesel locomotives, contain an engine-generator set to provide head-end power (HEP). They can also be used with a power car or a railcar. European railways have used control ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wye (rail)
In railroad structures, and rail terminology, a wye (like the'' 'Y' ''glyph) or triangular junction (often shortened to just "triangle") is a triangular joining arrangement of three rail lines with a railroad switch (set of points) at each corner connecting to each incoming line. A turning wye is a specific case. Where two rail lines join, or in a joint between a railroad's mainline and a spur, wyes can be used at a mainline rail junction to allow incoming trains the ability to travel in either direction, or in order to allow trains to pass from one line to the other line. Wyes can also be used for turning railway equipment, and generally cover less area than a balloon loop doing the same job, but at the cost of two additional sets of points to construct, then maintain. These turnings are accomplished by performing the railway equivalent of a three-point turn through successive junctions of the wye, the direction of travel and the relative orientation of a locomotive or rai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Northeast Corridor
The Northeast Corridor (NEC) is an electrified railroad line in the Northeast megalopolis of the United States. Owned primarily by Amtrak, it runs from Boston through Providence, New Haven, Stamford, New York City, Philadelphia, Wilmington, and Baltimore to Washington, D.C. The NEC closely parallels Interstate 95 for most of its length, and is the busiest passenger rail line in the United States both by ridership and by service frequency as of 2013. The NEC carries more than 2,200 trains daily. The corridor is used by many Amtrak trains, including the high-speed Acela, intercity trains and several long-distance trains. Most of the corridor also has frequent commuter rail service, operated by the MBTA, Shore Line East, Hartford Line, Metro-North Railroad, Long Island Rail Road, New Jersey Transit, SEPTA and MARC. While large through freights have not run on the NEC since the early 1980s, several companies continue to run smaller local freights over some select few sections ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amtrak
The National Railroad Passenger Corporation, Trade name, doing business as Amtrak () , is the national Passenger train, passenger railroad company of the United States. It operates inter-city rail service in 46 of the 48 contiguous United States, contiguous U.S. States and nine cities in Canada. ''Amtrak'' is a portmanteau of the words ''America'' and ''trak'', the latter itself a sensational spelling of ''track''. Founded in 1971 as a quasi-public corporation to operate many U.S. passenger rail routes, Amtrak receives a combination of state and federal subsidies but is managed as a for-profit corporation, for-profit organization. The United States federal government, through the United States Secretary of Transportation, Secretary of Transportation, owns all the company's Issued shares, issued and Shares outstanding, outstanding preferred stock. Amtrak's headquarters is located one block west of Washington Union Station, Union Station in Washington, D.C. Amtrak serves more th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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