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Keystone Wye
Keystone Wye is an interchange of U.S. Route 16 (US 16) and US 16A located in the Black Hills of South Dakota, featuring two unique structural glued laminated timber bridges. The Keystone Wye is a three-level Directional T interchange for the two divided highways, constructed in 1967-1968 as part of a project by the South Dakota Department of Transportation (SDDOT) to convert US 16 to a four-lane highway between Rapid City and Keystone. It was designed by Clyde Jundt and Kenneth C. Wilson. The high bridge (see photo in external reference) is supported by three wooden, single-hinged arches; six separate glued laminated timber pieces are used in the construction. Three more pieces were built but failed quality assurance tests; they were assembled into an interesting pyramidal sculpture which for years was located just off US 16 on the then-south edge of Rapid City (a site today occupied by a motel and convenience store), and which was moved to a new l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South Dakota Department Of Transportation
The South Dakota Department of Transportation (SDDOT) is a state government organization in charge of maintaining public roadways of the U.S. state of South Dakota. South Dakota has 82,447 miles of highways, roads and streets, as well as 5,905 bridges. The SDDOT is responsible for 7,830 miles of the roadway system. The DOT budgets roughly $15,700,000 for winter snow and ice removal each year. The Department of Transportation was formerly known as the South Dakota Department of Highways. Historic bridges A number of its bridges have been deemed historic, and some are listed on the U.S. National Register of Historic Places. In particular, several were listed on the National Register pursuant to a 1993 Multiple Property Submission titled "Historic Bridges in South Dakota, 1893-1943." The listed works include (with varying attribution): * Kemp Avenue Bridge, Kemp Avenue over the Sioux River, Watertown, South Dakota (South Dakota Highway Commission), NRHP-listed * Pig Tail Bridge, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Rushmore
Mount Rushmore National Memorial is a national memorial centered on a colossal sculpture carved into the granite face of Mount Rushmore (Lakota: ''Tȟuŋkášila Šákpe'', or Six Grandfathers) in the Black Hills near Keystone, South Dakota, United States. Sculptor Gutzon Borglum created the sculpture's design and oversaw the project's execution from 1927 to 1941 with the help of his son, Lincoln Borglum. The sculpture features the heads of four United States Presidents recommended by Borglum: George Washington (1732–1799), Thomas Jefferson (1743–1826), Theodore Roosevelt (1858–1919) and Abraham Lincoln (1809–1865). The four presidents were chosen to represent the nation's birth, growth, development and preservation, respectively. The memorial park covers and the mountain itself has an elevation of above sea level. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bridges Of The United States Numbered Highway System
A bridge is a structure built to span a physical obstacle (such as a body of water, valley, road, or rail) without blocking the way underneath. It is constructed for the purpose of providing passage over the obstacle, which is usually something that is otherwise difficult or impossible to cross. There are many different designs of bridges, each serving a particular purpose and applicable to different situations. Designs of bridges vary depending on factors such as the function of the bridge, the nature of the terrain where the bridge is constructed and anchored, and the material used to make it, and the funds available to build it. The earliest bridges were likely made with fallen trees and stepping stones. The Neolithic people built boardwalk bridges across marshland. The Arkadiko Bridge (dating from the 13th century BC, in the Peloponnese) is one of the oldest arch bridges still in existence and use. Etymology The ''Oxford English Dictionary'' traces the origin of the w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Road Bridges In South Dakota
A road is a linear way for the conveyance of traffic that mostly has an improved surface for use by vehicles (motorized and non-motorized) and pedestrians. Unlike streets, the main function of roads is transportation. There are many types of roads, including parkways, avenues, controlled-access highways (freeways, motorways, and expressways), tollways, interstates, highways, thoroughfares, and local roads. The primary features of roads include lanes, sidewalks (pavement), roadways (carriageways), medians, shoulders, verges, bike paths (cycle paths), and shared-use paths. Definitions Historically many roads were simply recognizable routes without any formal construction or some maintenance. The Organization for Economic Co-operation and Development (OECD) defines a road as "a line of communication (travelled way) using a stabilized base other than rails or air strips open to public traffic, primarily for the use of road motor vehicles running on their own wheels", which in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wooden Bridges In The United States
Wood is a porous and fibrous structural tissue found in the stems and roots of trees and other woody plants. It is an organic materiala natural composite of cellulose fibers that are strong in tension and embedded in a matrix of lignin that resists compression. Wood is sometimes defined as only the secondary xylem in the stems of trees, or it is defined more broadly to include the same type of tissue elsewhere such as in the roots of trees or shrubs. In a living tree it performs a support function, enabling woody plants to grow large or to stand up by themselves. It also conveys water and nutrients between the leaves, other growing tissues, and the roots. Wood may also refer to other plant materials with comparable properties, and to material engineered from wood, or woodchips or fiber. Wood has been used for thousands of years for fuel, as a construction material, for making tools and weapons, furniture and paper. More recently it emerged as a feedstock for the production ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Open-spandrel Deck Arch Bridges In The United States
A spandrel is a roughly triangular space, usually found in pairs, between the top of an arch and a rectangular frame; between the tops of two adjacent arches or one of the four spaces between a circle within a square. They are frequently filled with decorative elements. Meaning There are four or five accepted and cognate meanings of the term ''spandrel'' in architectural and art history, mostly relating to the space between a curved figure and a rectangular boundary – such as the space between the curve of an arch and a rectilinear bounding moulding, or the wallspace bounded by adjacent arches in an arcade and the stringcourse or moulding above them, or the space between the central medallion of a carpet and its rectangular corners, or the space between the circular face of a clock and the corners of the square revealed by its hood. Also included is the space under a flight of stairs, if it is not occupied by another flight of stairs. In a building with more than one floor, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Super Two
A super two, super two-lane highway or wide two-lane is a two-lane surface road built to highway standards with wide lanes and other safety features normally present on a freeway with more lanes, typically including partial control of access, occasional passing lanes and hard shoulders. It is often built for eventual conversion to freeway or at least divided-highway status once traffic volumes rise. Super twos have also been employed because of environmental concerns, such as where Interstate 93 becomes a super two in Franconia Notch, New Hampshire, United States. Ireland In the Republic of Ireland, the term ''wide two-lane'' is used by the National Roads Authority. In policy documents, the designation WS2 is used, which is also used in the UK for a wide single carriageway. Wide two-lane roads are common on national roads, both on less important but medium-capacity routes, and on more important routes not yet upgraded to dual carriageway or motorway. Wide two-lane roads in th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Three Forks, South Dakota
Three Forks is an unincorporated community in Pennington County, South Dakota, United States. It lies at the intersection of U.S. Routes 16 and 385, just north of Hill City along Spring Creek. A small general store featuring fuel is open year-round; other businesses are open seasonally, including a campground, a motel, a miniature golf-course, and an ice-cream stand. The campground is the site of an annual Octoberfest event, and the area is heavily patronized during the Sturgis Motorcycle Rally in August of each year. In recent years, considerable residential development of the immediate area has swollen its population. From Three Forks: *East (US 16) to the Keystone Wye and Rapid City. *North (US 385) to Sheridan Lake, Lead, and Deadwood. *South (US 16 and US 385 multiplexed) to Hill City and Custer. Three Forks is one of several places in the Black Hills where there are two routes indicated by highway signage directing travelers to Mount Rushmore National Memorial. See al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tunnel
A tunnel is an underground passageway, dug through surrounding soil, earth or rock, and enclosed except for the entrance and exit, commonly at each end. A pipeline is not a tunnel, though some recent tunnels have used immersed tube construction techniques rather than traditional tunnel boring methods. A tunnel may be for foot or vehicular road traffic, for rail traffic, or for a canal. The central portions of a rapid transit network are usually in the tunnel. Some tunnels are used as sewers or aqueducts to supply water for consumption or for hydroelectric stations. Utility tunnels are used for routing steam, chilled water, electrical power or telecommunication cables, as well as connecting buildings for convenient passage of people and equipment. Secret tunnels are built for military purposes, or by civilians for smuggling of weapons, contraband, or people. Special tunnels, such as wildlife crossings, are built to allow wildlife to cross human-made barriers safely. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Single Carriageway
A single carriageway (British English) or Undivided highway (American English) is a road with one, two or more lanes arranged within a one carriageway with no central reservation to separate opposing flows of traffic. A single-track road has a single lane with passing places for traffic in both directions. Road traffic safety is generally worse for high-speed single carriageways than for dual carriageways due to the lack of separation between traffic moving in opposing directions. Countries Ireland The term ''single carriageway'' is used for roads in the Republic of Ireland. Speed limits on single-carriageway roads vary depending on their classification: national primary roads and national secondary roads have a general speed limit of , while regional roads and local roads have a general speed limit of . In urban areas, the general speed limit is . United Kingdom The maximum UK speed limit for single-carriageway roads is lower than the maximum for dual-carriageway roads. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rest Area
A rest area is a public facility located next to a large thoroughfare such as a motorway, expressway, or highway, at which drivers and passengers can rest, eat, or refuel without exiting onto secondary roads. Other names include motorway service area (UK), services (UK), travel plaza, rest stop, oasis (US), service area, rest and service area (RSA), resto, service plaza, lay-by, and service centre (Canada). Facilities may include park-like areas, fuel stations, public toilets, water fountains, restaurants, and dump and fill stations for caravans / motorhomes. A rest area with limited to no public facilities is a lay-by, parking area, scenic area, or scenic overlook. Along some highways and roads are services known as wayside parks, roadside parks, or picnic areas. Overview The standards and upkeep of service station facilities vary by jurisdiction. Service stations have parking areas allotted for cars, trucks, articulated trucks, buses and caravans. Most state-run ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Black Elk Peak
Black Elk Peak is the highest natural point in the U.S. state of South Dakota and the Midwestern United States. It lies in the Black Elk Wilderness area, in southern Pennington County, in the Black Hills National Forest. The peak lies west-southwest of Mount Rushmore. At , it has been described by the Board on Geographical Names as the highest summit in the United States east of the Rocky Mountains. Though part of the North American Cordillera, it is generally considered to be geologically separate from the Rocky Mountains. Lost Mine peak in the Chisos Mountains of Texas, at an elevation of 7,535 feet, is the easternmost peak within the continental United States above 7,000 feet. It is also known as ''Hiŋháŋ Káǧa'' ('owl-maker' in Lakota) and ''Heȟáka Sápa'' ('elk black'). The U.S. Board on Geographic Names, which has jurisdiction in federal lands, officially changed the mountain's name from Harney Peak to Black Elk Peak on August 11, 2016, honoring Black Elk, the note ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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