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Cabin John Creek
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 emptie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rockville, Maryland
Rockville is a city that serves as the county seat of Montgomery County, Maryland, and is part of the Baltimore–Washington metropolitan area. The 2020 census tabulated Rockville's population at 67,117, making it the fifth-largest community in Montgomery County. Rockville, along with neighboring Gaithersburg and Bethesda, is at the core of the Interstate 270 Technology Corridor which is home to numerous software and biotechnology companies as well as several federal government institutions. The city, one of the major retail hubs in Montgomery County, also has several upscale regional shopping centers. History Early history Situated in the Piedmont region and crossed by three creeks ( Rock Creek, Cabin John Creek, and Watts Branch), Rockville provided an excellent refuge for semi-nomadic Native Americans as early as 8000 BC. By the first millennium BC, a few of these groups had settled down into year-round agricultural communities that exploited the native flora, includi ... [...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] |
List Of Maryland Rivers
List of rivers of Maryland (U.S. state). The list is arranged by drainage basin from east to west, with respective tributaries indented under each larger stream's name and ordered from downstream to upstream. By drainage basin Delaware River *Christina River Atlantic Ocean * Ayres Creek * Greys Creek * St. Martin River *Turville Creek * Trappe Creek Chesapeake Bay Eastern Shore * Pocomoke River ** Dividing Creek ** Nassawango Creek *Little Annemessex River *Big Annemessex River *Manokin River * Monie Creek * Wicomico River ** Beaverdam Creek * Nanticoke River **Barren Creek *** Mockingbird Creek **Marshyhope Creek *** Big Creek ***Stony Bar Creek ***Krafts Creek *** Spears Creek ***Becky Taylor Branch *** Mill Branch *** Mill Creek *** Puckum Branch *** Wrights Branch ***Skinners Run ***Davis Millpond Branch **** North Davis Millpond Branch **** South Davis Millpond Branch *** Miles Branch *** Tanyard Branch *** Faulkner Branch *** Tull Branch ***Sullivan Branch **** Raccoon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cabin John Parkway
Cabin John Parkway is an automobile parkway in the U.S. state of Maryland. The parkway runs from Clara Barton Parkway in Cabin John north to Interstate 495 (I-495) in Bethesda in southwestern Montgomery County. Cabin John Parkway is a four-lane freeway that serves as a connector between Clara Barton Parkway in the direction of Washington and I-495 in the direction of Rockville and Silver Spring. The parkway was constructed in the mid-1960s and passes under the historic Union Arch Bridge, the longest masonry arch span in America. Route description Cabin John Parkway begins at a partial interchange with Clara Barton Parkway in the unincorporated area of Cabin John. The interchange allows access from southbound Cabin John Parkway to eastbound Clara Barton Parkway and from westbound Clara Barton Parkway to northbound Cabin John Parkway. Each direction of the parkway crosses Cabin John Creek before the roadways come together to pass under the Union Arch Bridge, which carries the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stream Restoration
Stream restoration or river restoration, also sometimes referred to as river reclamation, is work conducted to improve the environmental health of a river or stream, in support of biodiversity, recreation, flood management and/or landscape development. Stream restoration approaches can be divided into two broad categories: form-based restoration, which relies on physical interventions in a stream to improve its conditions; and process-based restoration, which advocates the restoration of hydrological and geomorphological processes (such as sediment transport or connectivity between the channel and the floodplain) to ensure a stream's resilience and ecological health. Form-based restoration techniques include deflectors; cross-vanes; weirs, step-pools and other grade-control structures; engineered log jams; bank stabilization methods and other channel-reconfiguration efforts. These induce immediate change in a stream, but sometimes fail to achieve the desired effects if degradatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stormwater Management
Stormwater, also spelled storm water, is water that originates from precipitation (storm), including heavy rain and meltwater from hail and snow. Stormwater can soak into the soil ( infiltrate) and become groundwater, be stored on depressed land surface in ponds and puddles, evaporate back into the atmosphere, or contribute to surface runoff. Most runoff is conveyed directly as surface water to nearby streams, rivers or other large water bodies (wetlands, lakes and oceans) without treatment. In natural landscapes, such as forests, soil absorbs much of the stormwater. Plants also reduce stormwater by improving infiltration, intercepting precipitation as it falls, and by taking up water through their roots. In developed environments, such as cities, unmanaged stormwater can create two major issues: one related to the volume and timing of runoff (flooding) and the other related to potential contaminants the water is carrying (water pollution). In addition to the pollutants carried ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Water Quality
Water quality refers to the chemical, physical, and biological characteristics of water based on the standards of its usage. It is most frequently used by reference to a set of standards against which compliance, generally achieved through treatment of the water, can be assessed. The most common standards used to monitor and assess water quality convey the health of ecosystems, safety of human contact, extend of water pollution and condition of drinking water. Water quality has a significant impact on water supply and oftentimes determines supply options. Categories The parameters for water quality are determined by the intended use. Work in the area of water quality tends to be focused on water that is treated for potability, industrial/domestic use, or restoration (of an environment/ecosystem, generally for health of human/aquatic life). Human consumption Contaminants that may be in untreated water include microorganisms such as viruses, protozoa and bacteria; inorganic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Suburbanization
Suburbanization is a population shift from central urban areas into suburbs, resulting in the formation of (sub)urban sprawl. As a consequence of the movement of households and businesses out of the city centers, low-density, peripheral urban areas grow. Sub-urbanization is inversely related to urbanization, which denotes a population shift from rural areas into urban centers. Many residents of metropolitan regions work within the central urban area, but live outside of it, in satellite communities called suburbs, and commute to work by car or mass transit. Others have the opportunity to work from home, due to technological advances. Suburbanization often occurs in more economically developed countries. The United States is believed to be the first country in which the majority of the population lived in suburbs rather than cities or rural areas. Proponents of containing the urban sprawl argue that the sprawl leads to urban decay and a concentration of lower-income residents ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cabin John, Maryland
Cabin John is a census-designated place and an unincorporated area in Montgomery County, Maryland, United States. Its original southern boundary encompassed a section of the Chesapeake and Ohio Canal (C&O) including locks 8–12, and the northern shore of the Potomac River. It is also the access point to Plummers Island, originally owned by The Washington Biologists’ Field Club and called “the most thoroughly studied island in North America.” Cabin John is the location of the Union Arch Bridge built between 1857 and 1864; at the time of its completion, the bridge embodied the longest single-span masonry arch in the world and remains the longest in the United States. 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. Immediately adjacent to the west end of the Union Arch Bridge, overlooking the river, was the historic ... [...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] |
Culvert
A culvert is a structure that channels water past an obstacle or to a subterranean waterway. Typically embedded so as to be surrounded by soil, a culvert may be made from a pipe, reinforced concrete or other material. In the United Kingdom, the word can also be used for a longer artificially buried watercourse. Culverts are commonly used both as cross-drains to relieve drainage of ditches at the roadside, and to pass water under a road at natural drainage and stream crossings. When they are found beneath roads, they are frequently empty. A culvert may also be a bridge-like structure designed to allow vehicle or pedestrian traffic to cross over the waterway while allowing adequate passage for the water. Culverts come in many sizes and shapes including round, elliptical, flat-bottomed, open-bottomed, pear-shaped, and box-like constructions. The culvert type and shape selection is based on a number of factors including requirements for hydraulic performance, limitations on up ... [...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] |
