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Patterson Viaduct
The Patterson Viaduct was built by the Baltimore and Ohio Railroad (B&O) as part of its Old Main Line during May to December 1829. The viaduct spanned the Patapsco River at Ilchester, Maryland. It was heavily damaged by a flood in 1866 and subsequently replaced with other structures. History and design Original bridge The viaduct was constructed during the first building phase of the railroad, which extended from Baltimore, Maryland, to Ellicott's Mills (today's Ellicott City). The Patterson span at Ilchester, the third initial stone bridge built for the B&O, was similar in construction to the company's first bridge, the nearby Carrollton Viaduct further east spanning the Gwynns Falls and was named for B&O director and well known civic leader and merchant William Patterson who also donated land for Patterson Park in east Baltimore. It was designed by Caspar Wever and built under the supervision of John McCartney, one of Wever's assistants. McCartney's good work on the Patte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Patapsco River
The Patapsco River mainstem is a U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map , accessed April 1, 2011 river in central Maryland that flows into the Chesapeake Bay. The river's tidal portion forms the harbor for the city of Baltimore. With its South Branch, the Patapsco forms the northern border of Howard County, Maryland. The name "Patapsco" is derived from the Algonquian ''pota-psk-ut'', which translates to "backwater" or "tide covered with froth." History Captain John Smith was the first European to explore the river noting it on his 1612 map as the Bolus River. The "Red river", was named after the clay color, and is considered the "old Bolus", as other branches were also labeled Bolus on maps. As the river was not navigable beyond Elkridge, it was not a major path of commerce with only one ship listed as serving the northern branch, and four others operating around the mouth in 1723. The Patapsco River is referre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chord (geometry)
A chord of a circle is a straight line segment whose endpoints both lie on a circular arc. The infinite line extension of a chord is a secant line, or just ''secant''. More generally, a chord is a line segment joining two points on any curve, for instance, an ellipse. A chord that passes through a circle's center point is the circle's diameter. The word ''chord'' is from the Latin ''chorda'' meaning '' bowstring''. In circles Among properties of chords of a circle are the following: # Chords are equidistant from the center if and only if their lengths are equal. # Equal chords are subtended by equal angles from the center of the circle. # A chord that passes through the center of a circle is called a diameter and is the longest chord of that specific circle. # If the line extensions (secant lines) of chords AB and CD intersect at a point P, then their lengths satisfy AP·PB = CP·PD (power of a point theorem). In conics The midpoints of a set of parallel chords of a coni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Bridges Documented By The Historic American Engineering Record In Maryland
__NOTOC__ This is a list of bridges documented by the Historic American Engineering Record in the US state of Maryland. Bridges See also *List of bridges on the National Register of Historic Places in Maryland This is a list of bridges and tunnels on the National Register of Historic Places in the U.S. state of Maryland. References {{NRHP bridges Bridges on the National Register of Historic Places in Maryland, Lists of bridges on the Nationa ... * List of covered bridges in Maryland * List of tunnels documented by the Historic American Engineering Record in Maryland References {{HAER list, structure=bridge Bridges in Maryland, *List Historic American Engineering Record in Maryland, *List Lists of bridges documented by the Historic American Engineering Record, Maryland Lists of buildings and structures in Maryland, Bridges Maryland transportation-related lists, Bridges ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Howard County Properties In The Maryland Historical Trust
The Maryland Historical Trust serves as the central historic preservation office in Maryland. The properties listed reside within the boundaries of modern Howard County. Prior to 1851, sites would have been part of Anne Arundel County. Sites settled prior to 1650 would have been part of St Mary's County in the Province of Maryland which was settled in 1632 by Europeans. Maryland Historical Trust properties in Howard County *HO-1, Cherry Grove, 2937 Jennings Chapel Road, Woodbine *HO-2, Oakdale, 16449 Edwin Warfield Road, Woodbine *HO-3, Pleasant Valley (Lost by Neglect), 13893 Forsythe Road, Cooksville *HO-4, Red House Tavern, Hoods Mill Road (MD 97), Cooksville *HO-5, Roberts Inn, 14610 Frederick Road (MD 144), Cooksville *HO-6, Ellerslie, 2761 Roxbury Mills Road (MD 97), Cooksville *HO-7, Union Chapel (St. Andrew's Episcopal Church), Roxbury Mills Road (MD 97), Glenwood *HO-8, Longwood (The Dependency), 3188 Roxbury Mills Road (MD 97), Glenwood *HO-9, Round About Hills ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grist Mill Trail
The Grist Mill Trail is a 5.0 mile long hiking and biking trail located in Patapsco Valley State Park in the Baltimore County side of the Patapsco Valley near Catonsville, Maryland. The paved pathway runs parallel to the Baltimore and Ohio Railroad to the north, and the Patapsco River to the south. The original segment of the path connected the Lost Lake to the Patapsco Swinging Bridge in the Avalon area of the park. In 2006, the trail was expanded to Ilchester Road, where a second swinging bridge was built as a connection. All together, the Grist Mill Trail travels from River Road in Relay, Maryland to Ilchester Road/River Road in Ellicott City, Maryland Ellicott City is an unincorporated community and census-designated place in, and the county seat of, Howard County, Maryland, United States. Part of the Baltimore metropolitan area, its population was 65,834 at the 2010 census, making it the mo .... References {{coord missing, Maryland Bike paths in Maryland Catons ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cable-stayed Bridge
A cable-stayed bridge has one or more ''towers'' (or ''pylons''), from which cables support the bridge deck. A distinctive feature are the cables or stays, which run directly from the tower to the deck, normally forming a fan-like pattern or a series of parallel lines. This is in contrast to the modern suspension bridge, where the cables supporting the deck are suspended vertically from the main cable, anchored at both ends of the bridge and running between the towers. The cable-stayed bridge is optimal for spans longer than cantilever bridges and shorter than suspension bridges. This is the range within which cantilever bridges would rapidly grow heavier, and suspension bridge cabling would be more costly. Cable-stayed bridges were being designed and constructed by the late 16th century, and the form found wide use in the late 19th century. Early examples, including the Brooklyn Bridge, often combined features from both the cable-stayed and suspension designs. Cable-stayed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grist Mill Walking Bridge 02
Grist is grain that has been separated from its chaff in preparation for grinding. It can also mean grain that has been ground at a gristmill. Its etymology derives from the verb ''grind.'' Grist can be ground into meal or flour, depending on how coarsely it is ground. Maize made into grist is called grits when it is coarse, and corn meal when it is finely ground. Wheat, oats, barley, and buckwheat are also ground and sifted into flour and farina. Grist is also used in brewing and distillation to make a mash. "Grist for the mill" The proverb "all is grist for the mill" means "everything can be made useful, or be a source of profit." There are some minor variations, such as "all's grist that comes to his mill", meaning that the person in question can make something positive out of anything that comes along. A miller ground whatever grain was brought to him, and charged a portion of the final product for the service. Therefore, all grain arriving at the mill represented incom ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Patterson Viaduct Footbridge 2020a
Patterson may refer to: People * Patterson (surname) Places ;Canada *Pattersons Corners, Ontario *Patterson Township, Ontario *Patterson, Calgary a neighbourhood in Calgary, Alberta. ;United States of America * Patterson, Arkansas *Patterson, California *Patterson, California, former name of Trigo, Madera County, California *Patterson, California, former name of Cherokee, Nevada County, California *Patterson, Georgia * Patterson, Idaho *Patterson, Iowa *Patterson, Louisiana * Patterson, Missouri * Patterson, New Mexico *Patterson, New York * Patterson, Ohio *Lake Patterson, a lake in Minnesota *Patterson Springs, North Carolina * Patterson Heights, Pennsylvania * Patterson Tract, California Other uses * ''Bob Patterson'' (TV series), American sitcom * C.R. Patterson and Sons, American car manufacturer from 1915 until 1939. * ''Patterson'' (radio series), British radio series by Malcolm Bradbury * Patterson Companies, a medical supplies conglomerate based in Minnesota * Patterso ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Register Of Historic Places
The National Register of Historic Places (NRHP) is the United States federal government's official list of districts, sites, buildings, structures and objects deemed worthy of preservation for their historical significance or "great artistic value". A property listed in the National Register, or located within a National Register Historic District, may qualify for tax incentives derived from the total value of expenses incurred in preserving the property. The passage of the National Historic Preservation Act (NHPA) in 1966 established the National Register and the process for adding properties to it. Of the more than one and a half million properties on the National Register, 95,000 are listed individually. The remainder are contributing resources within historic districts. For most of its history, the National Register has been administered by the National Park Service (NPS), an agency within the U.S. Department of the Interior. Its goals are to help property owners and inte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ilchester Tunnel
Ilchester is a village and civil parish, situated on the River Yeo or Ivel, five miles north of Yeovil, in the English county of Somerset. Originally a Roman town, and later a market town, Ilchester has a rich medieval history and was a notable settlement in the county; around the 12th and 13th centuries it was effectively the county town. It had, however, declined in size and importance by the beginning of the 18th century, and the last markets were held in 1833.Local Histories Ilchester In 1889 the historic corporation that had governed the town (the Bailiff and Burgesses) was dissolved.Ilchester Parish Council - Ilchester Town Trust ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wing Wall
A wing wall (also "wingwall" or "wing-wall") is a smaller wall attached or next to a larger wall or structure. Bridges In a bridge, the wing walls are adjacent to the abutments and act as retaining walls. They are generally constructed of the same material as those of abutments. The wing walls can either be attached to the abutment or be independent of it. Wing walls are provided at both ends of the abutments to retain the earth filling of the approaches. Their design depends upon the nature of the embankment and does not depend upon the type or parts of the bridge. The soil and fill supporting the roadway and approach embankment are retained by the wing walls, which can be at a right angle to the abutment or splayed at different angles. The wing walls are generally constructed at the same time and of the same materials as the abutments. Classification of wing walls Wing walls can be classified according to their position in plan with respect to banks and abutments. The classif ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Abutment
An abutment is the substructure at the ends of a bridge span or dam supporting its superstructure. Single-span bridges have abutments at each end which provide vertical and lateral support for the span, as well as acting as retaining walls to resist lateral movement of the earthen fill of the bridge approach. Multi-span bridges require piers to support ends of spans unsupported by abutments. Dam abutments are generally the sides of a valley or gorge, but may be artificial in order to support arch dams such as Kurobe Dam in Japan. The civil engineering term may also refer to the structure supporting one side of an arch, or masonry used to resist the lateral forces of a vault.Pevsner, N. (1970) ''Cornwall''; 2nd ed. Harmondsworth: Penguin; p. 245 The impost or abacus of a column in classical architecture may also serve as an abutment to an arch. The word derives from the verb "abut", meaning to "touch by means of a mutual border". Use in engineering An abutment may be us ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
