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Robertson Tunnel
The Robertson Tunnel is a twin-bore light rail tunnel through the Tualatin Mountains west of Portland, Oregon, United States, used by the MAX Blue and Red Lines. The tunnel is long'' Light Rail and Modern Tramway'', November 1993, p. 302. UK: Ian Allan Publishing/ Light Rail Transit Association. and consists of twin tunnels. There is one station within the tunnel at Washington Park, which at deep is the deepest subway station in the United States and the fifth-deepest in the world. Trains are in the tunnel for about 5 minutes, which includes a stop at the Washington Park station. The tunnel has won several worldwide engineering and environmental awards. It was placed into service September 12, 1998. The tunnels pass through basalt layers up to 16 million years old. Due to variations in the rock composition, the tunnel curves mildly side to side and up and down to follow the best rock construction conditions. The tunnels vary from 80 to 300 feet (24–91 m) below the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tualatin Mountains
The Tualatin Mountains (also known as the West Hills or Southwest Hills of Portland) are a range on the western border of Multnomah County, Oregon, United States. A spur of the Northern Oregon Coast Range, they separate the Tualatin Basin of Washington County, Oregon, from the Portland Basin of western Multnomah County and Clark County, Washington. The highest peak in the range is Dixie Mountain at . Other notable peaks include Cornell Mountain at 1,270 feet (390m), Council Crest at , and Pittock Hill, location of the Pittock Mansion. Despite steep slopes, periodic landslides, and multiple earthquake faults, many residences have been built in the Tualatin Mountains, though much of the northern portion is undeveloped land within the Forest Park. The landscape, inside and outside the park, is predominantly forested. History The hills date from the late Cenozoic era, and range up to over . Composed mainly of basalt, the mountains were formed by several flows of the Grande Ron ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Basalt
Basalt (; ) is an aphanitic (fine-grained) extrusive igneous rock formed from the rapid cooling of low-viscosity lava rich in magnesium and iron (mafic lava) exposed at or very near the surface of a rocky planet or moon. More than 90% of all volcanic rock on Earth is basalt. Rapid-cooling, fine-grained basalt is chemically equivalent to slow-cooling, coarse-grained gabbro. The eruption of basalt lava is observed by geologists at about 20 volcanoes per year. Basalt is also an important rock type on other planetary bodies in the Solar System. For example, the bulk of the plains of Venus, which cover ~80% of the surface, are basaltic; the lunar maria are plains of flood-basaltic lava flows; and basalt is a common rock on the surface of Mars. Molten basalt lava has a low viscosity due to its relatively low silica content (between 45% and 52%), resulting in rapidly moving lava flows that can spread over great areas before cooling and solidifying. Flood basalts are t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Department Of Transportation
The United States Department of Transportation (USDOT or DOT) is one of the executive departments of the U.S. federal government. It is headed by the secretary of transportation, who reports directly to the President of the United States and is a member of the president's Cabinet. The department's mission is "to develop and coordinate policies that will provide an efficient and economical national transportation system, with due regard for need, the environment, and the national defense." History Prior to the creation of the Department of Transportation, its functions were administered by the under secretary of commerce for transportation. In 1965, Najeeb Halaby, administrator of the Federal Aviation Agency (predecessor to the Federal Aviation Administration, FAA), suggested to President Lyndon B. Johnson that transportation be elevated to a cabinet-level post, and that the FAA be folded into the DOT. It was established by Congress in the Department of Transportatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Urban Mass Transportation Administration
The Federal Transit Administration (FTA) is an agency within the United States Department of Transportation (DOT) that provides financial and technical assistance to local public transportation systems. The FTA is one of ten modal administrations within the DOT. Headed by an Administrator who is appointed by the President of the United States, the FTA functions through Washington, D.C headquarters office and ten regional offices which assist transit agencies in all states, the District of Columbia, and the territories. Until 1991, it was known as the Urban Mass Transportation Administration (UMTA). Public transportation includes buses, subways, light rail, commuter rail, monorail, passenger ferry boats, trolleys, inclined railways, and people movers. The federal government, through the FTA, provides financial assistance to develop new transit systems and improve, maintain, and operate existing systems. The FTA oversees grants to state and local transit providers, primarily ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beaverton–Hillsdale Highway
Oregon Route 10 is an Oregon state highway which serves Portland and some of its western suburbs. Route description OR 10 begins as Naito Parkway in Downtown Portland starting where Naito Parkway interchanges with U.S. Route 26. It heads south out of downtown, multiplexed with Oregon Route 99W. After passing under the Portland Aerial Tram, Naito Parkway ends at an interchange with Barbur Boulevard; the two routes continue south out of Portland on Barbur. OR 10 separates from OR 99W a few miles south of downtown, and proceeds along Capitol Highway through the Portland neighborhood of Hillsdale. Along here, it is a surface street, which cuts through the southern part of Portland's West Hills. It separates from Capitol Highway in Hillsdale, which continues unnumbered, and becomes the Beaverton-Hillsdale Highway, highway number 40, a surface street with frequent traffic signals. The highway continues west into Washington County. In the community of Raleigh Hills, OR 10 int ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hillsboro, Oregon
Hillsboro ( ) is the fifth-largest city in the U.S. state of Oregon and is the county seat of Washington County. Situated in the Tualatin Valley on the west side of the Portland metropolitan area, the city hosts many high-technology companies, such as Intel, locally known as the Silicon Forest. At the 2020 census, the city's population was 106,447. For thousands of years the Atfalati tribe of the Kalapuya lived in the Tualatin Valley near the later site of Hillsboro. The climate, moderated by the Pacific Ocean, helped make the region suitable for fishing, hunting, food gathering, and agriculture. Settlers founded a community here in 1842, later named after David Hill, an Oregon politician. Transportation by riverboat on the Tualatin River was part of Hillsboro's settler economy. A railroad reached the area in the early 1870s and an interurban electric railway about four decades later. These railways, as well as highways, aided the slow growth of the city to about 2,000 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beaverton, Oregon
Beaverton is a city in Washington County, in the U.S. state of Oregon with a small portion bordering Portland in the Tualatin Valley. The city is among the main cities that make up the Portland metropolitan area. Its population was 97,494 at the 2020 census, making it the second-largest city in the county and the seventh-largest city in Oregon. Beaverton is an economic center for Washington County along with neighboring Hillsboro. It is home to the world headquarters of Nike, Inc., although it sits outside of city limits on unincorporated county land. The hunter–gatherer Atfalati tribe of the Kalapuya people inhabited the Tualatin Valley prior to the arrival of European–American settlers in the 19th century. They occupied a village near the Beaverton and Fanno creeks called Chakeipi, which meant "place of the beaver", and early white settlers referred to this village as Beaverdam. Lawrence Hall took up the first land claim in 1847 and established a grist mill. The e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Downtown Portland, Oregon
Downtown Portland is the city center of Portland, Oregon, United States. It is on the west bank of the Willamette River in the northeastern corner of the southwest section of the city and where most of the city's high-rise buildings are found. The downtown neighborhood extends west from the Willamette to Interstate 405 and south from Burnside Street to just south of the Portland State University campus (also bounded by I-405), except for a part of northeastern portion north of SW Harvey Milk Street and east of SW 3rd Ave that belongs to the Old Town Chinatown neighborhood. High-density business and residential districts near downtown include the Lloyd District, across the river from the northern part of downtown, and the South Waterfront area, just south of downtown in the South Portland neighborhood. Portland's downtown features narrow streets— wide—and square, compact blocks on a side, to create more corner lots that were expected to be more valuable. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metro (Oregon Regional Government)
Metro is the regional government for the Oregon portion of the Portland metropolitan area, covering portions of Clackamas, Multnomah, and Washington Counties. It is the only directly elected regional government and metropolitan planning organization in the United States. Metro is responsible for overseeing the Portland region's solid waste system, general planning of land use and transportation, maintaining certain regional parks and natural areas, and operating the Oregon Zoo, Oregon Convention Center, Portland's Centers for the Arts, and the Portland Expo Center. It also distributes money from two voter-approved tax measures: one for homeless services and one for affordable housing. History and evolution Metro in its current form evolved from Columbia Region Association of Governments (CRAG) (1966–1978) and a predecessor Metropolitan Service District (MSD) (1957–1966). Measure 6, a 1978 statewide ballot measure established Metro, effective January 1, 1979. In 1992 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Washington County, Oregon
Washington County is one of 36 counties in the U.S. state of Oregon and part of the Portland metropolitan area. The 2020 census recorded the population as 600,372, making it the second most populous county in the state and most populous "Washington County" in the United States. Hillsboro is the county seat and largest city, while other major cities include Beaverton, Tigard, Cornelius, Banks, Gaston, Sherwood, North Plains, and Forest Grove, the county's oldest city. Originally named Twality when created in 1843, the Oregon Territorial Legislature renamed it for the nation's first president in 1849 and included the entire northwest corner of Oregon before new counties were created in 1854. The Tualatin River and its drainage basin lie almost entirely within the county, which shares its boundaries with the Tualatin Valley. It is bordered on the west and north by the Northern Oregon Coast Range, on the south by the Chehalem Mountains, and on the north and east by the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Robertson Core
Robertson may refer to: People * Robertson (surname) (includes a list of people with this name) * Robertson (given name) * Clan Robertson, a Scottish clan * Robertson, stage name of Belgian magician Étienne-Gaspard Robert (1763–1837) Places Australia * Division of Robertson, electoral district in the Australian House of Representatives, in New South Wales * Robertson, New South Wales * Robertson, Queensland * Robertson Barracks, an Australian Army base near Darwin, Northern Territory United States * Robertson Boulevard (Los Angeles), California * Robertson Gymnasium, University of California, Santa Barbara * Robertson Field (Connecticut), a public airport * Robertson County, Kentucky * Robertson Field (North Dakota), a public airport * Robertson Tunnel, Portland, Oregon, a light rail transit tunnel * Robertson County, Tennessee * Robertson County, Texas * Robertson Stadium, University of Houston, Houston, Texas * Robertson's Colony, Texas * Robertson, Wyoming Elsewhere ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oregon Route 217
Oregon Route 217 is an Oregon state highway which serves the western suburbs of Portland. OR 217 is a controlled-access highway which connects U.S. Route 26 with Interstate 5. OR 217 consists of the Beaverton-Tigard Highway 144 (see Oregon highways and routes). Route description For most of its length, OR 217 is a freeway with two travel lanes in each direction, with a third weave lane for exiting and merging, with the exception of its two termini. The southern terminus of OR 217 is an interchange with I-5. From there, OR 217 proceeds north, through suburbs of Tigard and Beaverton. The northern terminus of OR 217 is an interchange with US 26, at that point a freeway known as the Sunset Highway. Commuters heading towards either terminus will find themselves on surface streets if they fail to exit. Indeed, southbound travelers wishing to get onto northbound I-5 have to turn left at a traffic signal; southbound travelers of I-5 wishing to become northbound travelers of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
