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American Legion Memorial Bridge (Maryland)
The American Legion Memorial Bridge, also known as the American Legion Bridge and formerly as the Cabin John Bridge, is a bridge carrying Interstate 495 (Capital Beltway) across the Potomac River between Montgomery County, Maryland and Fairfax County, Virginia in the United States. It is an American Water Landmark. Plummers Island is located immediately downstream of the bridge. The bridge has five traffic lanes in each direction. The outermost lane in each direction is an entrance/exit-only lane for traffic to/from the Clara Barton Parkway in Maryland and the George Washington Memorial Parkway and Georgetown Pike ( State Route 193) in Virginia. There are no facilities for pedestrians or cyclists, which are prohibited. History Opened on December 31, 1962, the bridge was originally named the "Cabin John Bridge" because of its proximity to the community of Cabin John on the Maryland side of the Potomac River. The bridge opened without a ceremony due to the cold weathe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Potomac River
The Potomac River () drains the Mid-Atlantic United States, flowing from the Potomac Highlands into Chesapeake Bay. It is long,U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map. Retrieved August 15, 2011 with a drainage area of 14,700 square miles (38,000 km2), and is the fourth-largest river along the East Coast of the United States and the 21st-largest in the United States. Over 5 million people live within its watershed. The river forms part of the borders between Maryland and Washington, D.C. on the left descending bank and between West Virginia and Virginia on the right descending bank. Except for a small portion of its headwaters in West Virginia, the North Branch Potomac River is considered part of Maryland to the low-water mark on the opposite bank. The South Branch Potomac River lies completely within the state of West Virginia except for its headwaters, which lie in Virginia. Course The Potomac River runs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Virginia Route 28
State Route 28 (SR 28) in the U.S. state of Virginia is a primary state highway that traverses the counties of Loudoun, Fairfax, Prince William, and Fauquier in the U.S. state of Virginia. The route serves as a major artery in the Northern Virginia region, with it being an important two-lane highway in rural Fauquier and Prince William Counties, the main thoroughfare through Manassas and Manassas Park, and a high-capacity freeway through Fairfax and Loudoun Counties. Route description From SR 28's southern terminus to Nokesville, it is a two-lane rural highway, called Catlett Road through Fauquier County and Nokesville Road in Prince William County where it becomes a 4-lane divided highway up to Manassas. Through downtown Manassas, the route follows one-way streets, with VA 28 westbound following Church Street and eastbound following Center Street and Zebedee Street. From thereon to Centreville in Fairfax County, the road is called Centreville Road. Between Fairfax and Loud ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Loudoun County, Virginia
Loudoun County () is in the northern part of the Commonwealth of Virginia in the United States. In 2020, the census returned a population of 420,959, making it Virginia's third-most populous county. Loudoun County's seat is Leesburg. Loudoun County is part of the Washington–Arlington–Alexandria, DC–VA–MD–WV Metropolitan Statistical Area. As of 2020, Loudoun County had a median household income of $147,111. Since 2008, the county has been ranked first in the U.S. in median household income among jurisdictions with a population of 65,000 or more. Between 1952 and 2008, Loudoun was a Republican-leaning county. However, this has changed in recent years with Democrats winning Loudoun in all statewide campaigns after 2014 and Democrats holding a two-thirds majority on the county Board of Supervisors, reflective of an ongoing realignment of affluent and college-educated voters towards the party. __TOC__ History Loudoun County was established in 1757 from Fairfax Count ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Washington, D
Washington commonly refers to: * Washington (state), United States * Washington, D.C., the capital of the United States ** A metonym for the federal government of the United States ** Washington metropolitan area, the metropolitan area centered on Washington, D.C. * George Washington (1732–1799), the first president of the United States Washington may also refer to: Places England * Washington, Tyne and Wear, a town in the City of Sunderland metropolitan borough ** Washington Old Hall, ancestral home of the family of George Washington * Washington, West Sussex, a village and civil parish Greenland * Cape Washington, Greenland * Washington Land Philippines *New Washington, Aklan, a municipality *Washington, a barangay in Catarman, Northern Samar *Washington, a barangay in Escalante, Negros Occidental *Washington, a barangay in San Jacinto, Masbate *Washington, a barangay in Surigao City United States * Washington, Wisconsin (other) * Fort Washington (other) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chain Bridge (Potomac River)
The Chain Bridge is a viaduct which crosses the Potomac River at Little Falls in Washington, D.C. The steel girder bridge carries close to 22,000 cars a day. It connects Washington with affluent sections of Arlington and Fairfax counties in Virginia. On the Washington side, the bridge connects with Canal Road. Left turns onto the Clara Barton Parkway from the Chain Bridge are prohibited, but the reverse is permitted. On the Virginia side, the bridge connects with State Route 123 (Chain Bridge Road), which provides access to the George Washington Memorial Parkway. The Chain Bridge has three lanes (of which the center is reversible) and can be safely accessed by pedestrians and cyclists. The pedestrian sidewalk provides access to the Chesapeake and Ohio Canal towpath via a ramp. The bridge also carries water mains which provides Arlington County with water from the Washington Aqueduct. History The first bridge at the location was opened on July 3, 1797. It was a wooden c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Point Of Rocks Bridge
U.S. Route 15 (US 15) is a part of the U.S. Highway System that runs from Walterboro, South Carolina to Painted Post, New York. In Maryland, the highway runs from the Virginia state line at the Potomac River in Point of Rocks north to the Pennsylvania state line near Emmitsburg. Known for most of its length as Catoctin Mountain Highway, US 15 is the primary north–south highway of Frederick County. The highway connects the county seat of Frederick with Point of Rocks, Leesburg, Virginia, and Charles Town, West Virginia (via US 340), to the south and with Thurmont, Emmitsburg, and Gettysburg, Pennsylvania, to the north. US 15 is a four-lane divided highway throughout the state except for the portion between the Point of Rocks Bridge and the highway's junction with US 340 near Jefferson. The highway is a freeway along its concurrency with US 340 and through Frederick, where the highway meets US 40 and Interstate 70 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
High Tech
High technology (high tech), also known as advanced technology (advanced tech) or exotechnology, is technology that is at the cutting edge: the highest form of technology available. It can be defined as either the most complex or the newest technology on the market. The opposite of high tech is '' low technology'', referring to simple, often traditional or mechanical technology; for example, a slide rule is a low-tech calculating device. When high tech becomes old, it becomes low tech, for example vacuum tube electronics. The phrase was used in a 1958 ''The New York Times'' story advocating "atomic energy" for Europe: "... Western Europe, with its dense population and its high technology ...." Robert Metz used the term in a financial column in 1969, saying Arthur H. Collins of Collins Radio "controls a score of high technology patents in a variety of fields." and in a 1971 article used the abbreviated form, "high tech." A widely used classification of high-technological manuf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Edge City
''Edge city'' is a term that originated in the United States for a concentration of business, shopping, and entertainment outside a traditional downtown or central business district, in what had previously been a suburban residential or rural area. The term was popularized by the 1991 book ''Edge City: Life on the New Frontier'' by Joel Garreau, who established its current meaning while working as a reporter for ''The Washington Post''. Garreau argues that the edge city has become the standard form of urban growth worldwide, representing a 20th-century urban form unlike that of the 19th-century central downtown. Other terms for these areas include ''suburban activity centers'', ''megacenters'', and ''suburban business districts''. These districts have now developed in many countries. Definitions In 1991, Garreau established five rules for a place to be considered an edge city: * Has five million or more square feet (465,000 m²) of leasable office space * Has 600,000 squar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cabin John Creek (Potomac River)
Cabin John Creek is a tributary stream of the Potomac River in Montgomery County, Maryland. The watershed covers an area of . The headwaters of the creek originate in the city of Rockville, and the creek flows southward for U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map, accessed August 15, 2011 to the Potomac River. History Early land records in 1715 cite Captain John's Run, now Cabin John Creek. The toponym "Cabin John" is thought to be a corruption of the name "Captain John", but the origin of the name remains unresolved. Course The headwaters of the creek originate in the city of Rockville. The Cabin John Stream Valley Trail follows the course of the creek for , passing through Cabin John Regional Park and Cabin John Local Park. The Union Arch Bridge carries MacArthur Boulevard and the Washington Aqueduct over the stream about 1/4 mile before the creek flows through a culvert under the Chesapeake and Ohio Canal and empties ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Washington Aqueduct
The Washington Aqueduct is an aqueduct that provides the public water supply system serving Washington, D.C., and parts of its suburbs, using water from the Potomac River. One of the first major aqueduct projects in the United States, the Aqueduct was commissioned by Congress in 1852, and construction began in 1853 under the supervision of Montgomery C. Meigs and the US Army Corps of Engineers. Portions of the Aqueduct went online on January 3, 1859, and the full pipeline began operating in 1864. The system is owned and operated by the Corps of Engineers and has been in continuous use ever since. It is listed as a National Historic Landmark, and the Union Arch Bridge within the system is listed as a Historic Civil Engineering Landmark. Design and facilities The centerpiece of the Aqueduct is a 12-mile (19 km) pipeline which connects the system's dam at Great Falls with the Dalecarlia Reservoir on the border with Montgomery County, Maryland. Portions of the Aqueduct went onlin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Union Arch Bridge
The Union Arch Bridge, also called the "Cabin John Bridge", is a historic masonry structure in Cabin John, Maryland. It was designed as part of the Washington Aqueduct. The bridge construction began in 1857 and was completed in 1864. The roadway surface was added later. The bridge was designed by Alfred Landon Rives, and built by the United States Army Corps of Engineers under the direction of Lieutenant Montgomery C. Meigs. The Union Arch Bridge was designated as a National Historic Civil Engineering Landmark by the American Society of Civil Engineers in 1972 and was listed in the National Register of Historic Places in 1973. Bridge design The bridge, with an overall length of and width of , is constructed of Massachusetts granite and red sandstone quarried at the nearby Seneca Quarry, and rises above Cabin John Creek. The main arch span is long and rises . The bridge has an internal spandrel wall structure that contains nine additional smaller arches, which are concealed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
