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Great Falls Park
Great Falls Park is a small National Park Service (NPS) site in Virginia, United States. Situated on along the banks of the Potomac River in northern Fairfax County, the park is a disconnected but integral part of the George Washington Memorial Parkway. The Great Falls of the Potomac River are near the northern boundary of the park, as are the remains of the Patowmack Canal, the first canal in the United States that used locks to raise and lower boats. History Native American petroglyphs have been discovered within the park on cliffs overlooking Difficult Run. The Patowmack Canal, which George Washington partially funded, was a one-mile (1.6 km) bypass canal that began operating in 1785 to give small barges the opportunity to skirt around the falls and to distribute manufactured goods upstream and raw materials downstream. The park visitor center has the bottom portions of two wooden canal lock gates excavated in the 1980s from the canal. The gates survived from at least ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fairfax County, Virginia
Fairfax County, officially the County of Fairfax, is a county in the Commonwealth of Virginia. It is part of Northern Virginia and borders both the city of Alexandria and Arlington County and forms part of the suburban ring of Washington, D.C. The county is predominantly suburban in character with some urban and rural pockets. As of the 2020 census, the population was 1,150,309, making it Virginia's most populous jurisdiction, with around 13% of the Commonwealth's population. The county is also the most populous jurisdiction in the Washington-Arlington-Alexandria, DC-VA-MD-WV Metropolitan Statistical Area, with around 20% of the MSA population, as well as the larger Washington-Baltimore-Arlington, DC-MD-VA-WV-PA Combined Statistical Area, with around 13% of the CSA population. The county seat is Fairfax, although because it is an independent city under Virginia law, the city of Fairfax is not part of Fairfax County. Fairfax was the first U.S. county to reach a six-figure ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Native Americans In The United States
Native Americans, also known as American Indians, First Americans, Indigenous Americans, and other terms, are the Indigenous peoples of the mainland United States ( Indigenous peoples of Hawaii, Alaska and territories of the United States are generally known by other terms). There are 574 federally recognized tribes living within the US, about half of which are associated with Indian reservations. As defined by the United States Census, "Native Americans" are Indigenous tribes that are originally from the contiguous United States, along with Alaska Natives. Indigenous peoples of the United States who are not listed as American Indian or Alaska Native include Native Hawaiians, Samoan Americans, and the Chamorro people. The US Census groups these peoples as " Native Hawaiian and other Pacific Islanders". European colonization of the Americas, which began in 1492, resulted in a precipitous decline in Native American population because of new diseases, wars, ethni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tram
A tram (called a streetcar or trolley in North America) is a rail vehicle that travels on tramway tracks on public urban streets; some include segments on segregated right-of-way. The tramlines or networks operated as public transport are called tramways or simply trams/streetcars. Many recently built tramways use the contemporary term light rail. The vehicles are called streetcars or trolleys (not to be confused with trolleybus) in North America and trams or tramcars elsewhere. The first two terms are often used interchangeably in the United States, with ''trolley'' being the preferred term in the eastern US and ''streetcar'' in the western US. ''Streetcar'' or ''tramway'' are preferred in Canada. In parts of the United States, internally powered buses made to resemble a streetcar are often referred to as "trolleys". To avoid further confusion with trolley buses, the American Public Transportation Association (APTA) refers to them as "trolley-replica buses". In the Unit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trolley Park
Trolley may refer to: Vehicles and components * Tram, or trolley or streetcar, a rail vehicle that runs on tramway tracks * Trolleybus, or trolley, an electric bus drawing power from overhead wires using trolley poles ** Trolleytruck, a trolleybus-like vehicle used for carrying cargo * Tourist trolley, a rubber-tired bus designed to resemble an old-style streetcar or tram * Trolley (horse-drawn), a goods vehicle with four wheels of equal size mounted underneath it * Rail push trolley, a small vehicle for inspecting rail lines Tools * Airline service trolley, a small serving cart used by flight attendants inside an aircraft * Boat dolly, or trolley, a device for launching small boats into the water * Creeper (tool), a low-profile, wheeled platform used by auto mechanics * Flatbed trolley, or dray, for freight transport in distribution environments ** Piano trolley, a device for moving pianos * Golf trolley, a trolley designed for carrying a golf equipment * Laptop charging trolle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amusement Park
An amusement park is a park that features various attractions, such as rides and games, as well as other events for entertainment purposes. A theme park is a type of amusement park that bases its structures and attractions around a central theme, often featuring multiple areas with different themes. Unlike temporary and mobile funfairs and carnivals, amusement parks are stationary and built for long-lasting operation. They are more elaborate than city parks and playgrounds, usually providing attractions that cater to a variety of age groups. While amusement parks often contain themed areas, theme parks place a heavier focus with more intricately-designed themes that revolve around a particular subject or group of subjects. Amusement parks evolved from European fairs, pleasure gardens, and large picnic areas, which were created for people's recreation. World's fairs and other types of international expositions also influenced the emergence of the amusement park industry ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Washington And Old Dominion Railroad
The Washington and Old Dominion Railroad (colloquially referred to as the W&OD) was an intrastate short-line railroad located in Northern Virginia, United States. The railroad was a successor to the bankrupt Washington and Old Dominion Railway and to several earlier railroads, the first of which began operating in 1859. The railroad closed in 1968. The Railroad's oldest line extended from Alexandria on the Potomac River northwest to Bluemont at the base of the Blue Ridge Mountains near Snickers Gap, not far from the boundary line between Virginia and West Virginia. The railroad's route largely paralleled the routes of the Potomac River and the present Virginia State Route 7. The single-tracked line followed the winding course of Four Mile Run upstream from Alexandria through Arlington to Falls Church. At that point, the railroad was above the Fall Line and was able to follow a more direct northwesterly course in Virginia through Dunn Loring, Vienna, Sunset Hills (now in Rest ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Great Falls And Old Dominion Railroad
The Great Falls and Old Dominion Railroad (GF&OD) was an interurban trolley line that ran in Northern Virginia during the early 20th century. History Chartered in 1900 by a group of local landowners and acquired in 1902 by John Roll McLean (owner of ''The Washington Post'') and Senator Stephen Benton Elkins, the 15-mile electrified railroad began operating from Georgetown in Washington, D.C., in 1906. The first scheduled car reached Great Falls Park in Fairfax County, Virginia, on July 3 of that year. From Georgetown, the railroad crossed the Potomac River on a superstructure built on the upstream side of the old Aqueduct Bridge to Rosslyn in Arlington, where it made connections with an older electric trolley line, the Washington, Arlington & Falls Church Railway (see Northern Virginia trolleys). From Rosslyn, the railroad traveled northwest along the north side of Lee Highway (now part of U.S. Route 29) to Cherrydale and then on its own right-of-way (now Old Dominion D ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Matildaville, Virginia
Matildaville is a ghost town located along the Patowmack Canal near present day Great Falls, Virginia, United States. It was named for the wife of Light Horse Harry Lee, on 40 acres of land owned at the time by Bryan Fairfax, 8th Lord Fairfax of Cameron, and served as headquarters for the Patowmack Company from 1785 until 1799. Now, all that remains of the town are a series of ruins on the grounds of Great Falls Park. History Although both the Maryland and Virginia legislatures issued charters for the Patowmack Company in 1785, and George Washington became its first president (as well as owner of 50 shares of stock), the Virginia General Assembly did not issue a charter for this town until 1790. Its first trustees were: George Gilpin, Albert Russell, Josiah Clapham, Richard Bland Lee, Leven Powell and Samuel Love. It began as a staging and headquarters area for construction of the canal. At its height the town included the residence of the Patowmack Canal Company superintendent, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Civil Engineering
Civil engineering is a professional engineering discipline that deals with the design, construction, and maintenance of the physical and naturally built environment, including public works such as roads, bridges, canals, dams, airports, sewage systems, pipelines, structural components of buildings, and railways. Civil engineering is traditionally broken into a number of sub-disciplines. It is considered the second-oldest engineering discipline after military engineering, and it is defined to distinguish non-military engineering from military engineering. Civil engineering can take place in the public sector from municipal public works departments through to federal government agencies, and in the private sector from locally based firms to global Fortune 500 companies. History Civil engineering as a discipline Civil engineering is the application of physical and scientific principles for solving the problems of society, and its history is intricately linked to advances in t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Railroad
Rail transport (also known as train transport) is a means of transport that transfers passengers and goods on wheeled vehicles running on rails, which are incorporated in tracks. In contrast to road transport, where the vehicles run on a prepared flat surface, rail vehicles (rolling stock) are directionally guided by the tracks on which they run. Tracks usually consist of steel rails, installed on sleepers (ties) set in ballast, on which the rolling stock, usually fitted with metal wheels, moves. Other variations are also possible, such as "slab track", in which the rails are fastened to a concrete foundation resting on a prepared subsurface. Rolling stock in a rail transport system generally encounters lower frictional resistance than rubber-tyred road vehicles, so passenger and freight cars (carriages and wagons) can be coupled into longer trains. The operation is carried out by a railway company, providing transport between train stations or freight customer facili ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chesapeake And Ohio Canal
The Chesapeake and Ohio Canal, abbreviated as the C&O Canal and occasionally called the "Grand Old Ditch," operated from 1831 until 1924 along the Potomac River between Washington, D.C. and Cumberland, Maryland. It replaced the Potomac Canal, which shut down completely in 1828, and could operate during months in which the water level was too low for the former canal. The canal's principal cargo was coal from the Allegheny Mountains. Construction on the canal began in 1828 and ended in 1850 with the completion of a stretch to Cumberland, although the Baltimore and Ohio Railroad had already reached Cumberland in 1842. Rising and falling over an elevation change of , it required the construction of 74 Lock (water transport), canal locks, 11 Navigable aqueduct, aqueducts to cross major streams, more than 240 culverts to cross smaller streams, and the Paw Paw Tunnel. A planned section to the Ohio River at Pittsburgh was never built. The canalway is now maintained as the Chesapeake ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gunpowder
Gunpowder, also commonly known as black powder to distinguish it from modern smokeless powder, is the earliest known chemical explosive. It consists of a mixture of sulfur, carbon (in the form of charcoal) and potassium nitrate (saltpeter). The sulfur and carbon act as fuels while the saltpeter is an oxidizer. Gunpowder has been widely used as a propellant in firearms, artillery, rocketry, and pyrotechnics, including use as a blasting agent for explosives in quarrying, mining, building pipelines and road building. Gunpowder is classified as a low explosive because of its relatively slow decomposition rate and consequently low brisance. Low explosives deflagrate (i.e., burn at subsonic speeds), whereas high explosives detonate, producing a supersonic shockwave. Ignition of gunpowder packed behind a projectile generates enough pressure to force the shot from the muzzle at high speed, but usually not enough force to rupture the gun barrel. It thus makes a good propellan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
