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Fort McHenry Tunnel
The Fort McHenry Tunnel is a four-tube, bi-directional tunnel that carries traffic on Interstate 95 (I-95) underneath the Baltimore Harbor. Named for nearby Fort McHenry, the tunnel is the lowest point in the Interstate Highway System under water. Construction began in May 1980; the tunnel opened on November 23, 1985. Having consumed some $750 million (equivalent to $ billion in ), it was the most expensive Interstate project until surpassed by the Big Dig in Boston.DCRoads.net"Fort McHenry Tunnel: Historic Overview" Accessed 2011-07-11. , it was used by 43.4 million vehicles annually. Tolls are collected in both directions. The toll for cars is $3 with a Maryland E-ZPass and $4 with another state's E-ZPass. Vehicles without an E-ZPass pay more, as do those with more than two axles—up to $45 for a 6+ axle vehicle without an E-ZPass. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Interstate 95 In Maryland
Interstate 95 (I-95) is an Interstate Highway running along the East Coast of the United States from Miami, Florida, north to the Canada–United States border, Canadian border at Houlton, Maine. In Maryland, the route is a major highway that runs diagonally from southwest to northeast, entering from the District of Columbia and Virginia at the Woodrow Wilson Bridge over the Potomac River, northeast to the Delaware state line near Elkton, Maryland, Elkton. It is the longest Interstate Highway within Maryland and is one of the most traveled Interstate Highways in the state, especially between Baltimore and Washington, D.C., despite alternate routes along the corridor, such as the Baltimore–Washington Parkway, U.S. Route 1 in Maryland, U.S. Route 1 (US 1), and U.S. Route 29 in Maryland, US 29. I-95 also has eight auxiliary routes in the state, the most of any state along the I-95 corridor. Portions of the highway, including the Fort McHenry Tunnel and the Mi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baltimore
Baltimore is the most populous city in the U.S. state of Maryland. With a population of 585,708 at the 2020 census and estimated at 568,271 in 2024, it is the 30th-most populous U.S. city. The Baltimore metropolitan area is the 20th-largest metropolitan area in the country at 2.84 million residents. The city is also part of the Washington–Baltimore combined statistical area, which had a population of 9.97 million in 2020. Baltimore was designated as an independent city by the Constitution of Maryland in 1851. Though not located under the jurisdiction of any county in the state, it forms part of the central Maryland region together with the surrounding county that shares its name. The land that is present-day Baltimore was used as hunting ground by Paleo-Indians. In the early 1600s, the Susquehannock began to hunt there. People from the Province of Maryland established the Port of Baltimore in 1706 to support the tobacco trade with Europe and established the Town ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Patapsco River
The Patapsco River ( ) mainstem is a 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 Eastern Algonquian languages, Algonquian ''pota-psk-ut'', which translates to "backwater" or "tide covered with froth". History John Smith of Jamestown, Captain John Smith was the first European to explore the river, noting it on his 1612 map as the Bolus River. The "Red river", named after the clay color, 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 significant path of commerce; in 1723, only one ship was listed as serving the northern branch, and four others operating around the mouth. The first land record regarding Parr's Springs, the source of the South Branch, dates from 1744, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hanover Street Bridge
The Hanover Street Bridge, officially the Vietnam Veterans Memorial Bridge, is a double leaf bascule bridge crossing the middle branch of the Patapsco River along Hanover Street (Maryland Route 2) in Baltimore, Maryland. Description The Hanover Street Bridge is a -long Beaux-Arts-style double leaf bascule bridge spanning the middle branch of the Patapsco River in the outer harbor of Baltimore, linking the downtown and the community of Westport. It has 38 spans. History The Hanover Street Bridge replaced the Light Street Bridge, a wooden "long bridge" built in 1858, which had burnt down in 1914. Around the time of the construction of the bridge, trucks had begun to overtake steamboats as the preferred means of transferring goods. It was designed by the J. E. Greiner Company on the behalf of the Maryland State Roads Commission, becoming the longest reinforced concrete bridge in Maryland at its opening in 1916. The bridge's construction spurred residential and indus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
I-95
Interstate 95 (I-95) is the main north–south Interstate Highway on the East Coast of the United States, running from U.S. Route 1 (US 1) in Miami, Florida, north to the Houlton–Woodstock Border Crossing between Maine and the Canadian province of New Brunswick. The highway largely parallels the Atlantic coast and US 1, except for the portion between Savannah, Georgia, and Washington, D.C., and the portion between Portland and Houlton in Maine, both of which follow a more direct inland route. I-95 serves as the principal road link between the major cities of the Eastern Seaboard. Major metropolitan areas along its route include Miami, Jacksonville, and Savannah in the Southeast; Richmond, Washington, Baltimore, Wilmington–Philadelphia, Newark, and New York City in the Mid-Atlantic; and New Haven, Providence, Boston, and Portland in New England. The Charleston, Wilmington, and Norfolk–Virginia Beach metropolitan areas, the three major coast ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Francis Scott Key Bridge (Baltimore)
The Francis Scott Key Bridge (informally, Key Bridge or Beltway Bridge) was a steel arch continuous through truss bridge that spanned the lower Patapsco River and outer Baltimore Harbor/Port. Opened on March 23, 1977, it carried the Baltimore Beltway ( Interstate 695 or I-695) between Dundalk and Hawkins Point. It collapsed on March 26, 2024, after a container ship struck one of its piers. Officials have announced plans to replace the bridge by fall 2028. Initially named the Outer Harbor Crossing, the bridge was renamed in 1976 for poet Francis Scott Key, who wrote the lyrics to "The Star-Spangled Banner", the U.S. national anthem. At , it was the second-longest bridge in the Baltimore metropolitan area, after the Chesapeake Bay Bridge. Its main span of was the third-longest of any continuous truss in the world.Durkee, JacksonWorld's Longest Bridge Spans, National Steel Bridge Alliance, May 24, 1999. Operated by the Maryland Transportation Authority (MDTA), the bridg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Francis Scott Key Bridge Collapse
On March 26, 2024, at 1:28a.m. Eastern Time Zone, EDT (05:28 UTC), the main Span (engineering), spans and the three nearest northeast approach spans of the Francis Scott Key Bridge (Baltimore), Francis Scott Key Bridge across the Patapsco River in the Baltimore metropolitan area of Maryland, United States, collapsed after the container ship ''MV Dali, Dali'' struck one of its Pier (architecture), piers. Six members of a maintenance crew working on the roadway were killed, while two more were rescued from the river. The collapse blocked most shipping to and from the Port of Baltimore for 11 weeks. Maryland Governor Wes Moore called the event a "global crisis" that had affected more than 8,000 jobs. The economic impact of the closure of the waterway has been estimated at $15 million per day. Maryland officials have said they plan to Francis Scott Key Bridge replacement, replace the bridge by fall 2028 at an estimated cost of $1.7 billion to $1.9 billion. Background The Fran ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baltimore Harbor Tunnel
The Baltimore Harbor Tunnel is a pair of two-lane road tunnels carrying I-895 under the Patapsco River southeast of downtown Baltimore, Maryland. Description The pair of tunnels is long, stretching from the south shore of the Patapsco River to the north shore near Dundalk. Each tunnel is wide and high, and accommodates two lanes of traffic. The maximum speed within the tunnel is . Two-way traffic may occur in either tunnel for overnight roadwork or during emergencies that close down one of the tunnels. The Tunnel has lane control signals to control which lanes are open, closed or as contra-flow traffic. Both portals have ventilation buildings, with a total of 32 fans in place to replace the air within the tunnels, which is drawn in through the tunnel floors and exhausted through the tunnel ceilings. The tubes themselves range from a depth of below ground to below ground. As of July 1, 2015, the toll rate for cars is $4.00 cash or $3.00 E-ZPass, paid in both directions ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kiewit Corporation
Kiewit Corporation is an American construction company based in Omaha, Nebraska founded in 1884. In 2021, it was ranked 243rd on the Fortune 500. Privately held, it is one of the largest construction and engineering organizations in North America. It is an employee-owned company. History The company was founded in 1884 as Kiewit Brothers Masonry Contractors by Peter and Andrew Kiewit, who were of Dutch descent. Their father, John Kiewit, emigrated from The Hague in 1857, where he learned the trade of brickmaking. John Kiewit established a brickyard in Omaha, Nebraska where his sons worked and learned the skills for their masonry business. Early projects included the seven-story Lincoln Hotel in Lincoln as stonemasons and the Bekins warehouse as general contractor. It is an employee-owned company. The original brothers dissolved their partnership in 1904 and the founding Peter Kiewit continued as a sole proprietorship. In 1912, two of his sons, Ralph and George Kiewit, joined ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Joint Venture
A joint venture (JV) is a business entity created by two or more parties, generally characterized by shared ownership, shared returns and risks, and shared governance. Companies typically pursue joint ventures for one of four reasons: to access a new market, particularly emerging market; to gain scale efficiencies by combining assets and operations; to share risk for major investments or projects; or to access skills and capabilities.' Most joint ventures are incorporated, although some, as in the oil and gas industry, are "unincorporated" joint ventures that mimic a corporate entity. With individuals, when two or more persons come together to form a temporary partnership for the purpose of carrying out a particular project, such partnership can also be called a joint venture where the parties are "''co-venturers''". A joint venture can take the form of a business. It can also take the form of a project or asset JV, created for the purpose of pursuing one specific project, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Immersed Tube
An immersed tube (or immersed tunnel) is a kind of undersea tunnel composed of segments, Modular construction, constructed elsewhere and floated to the tunnel site to be sunk into place and then linked together. They are commonly used for road and rail crossings of rivers, Estuary, estuaries and sea channels/harbours. Immersed tubes are often used in conjunction with other forms of tunnel at their end, such as a cut and cover or Boring (earth), bored tunnel, which is usually necessary to continue the tunnel from near the water's edge to the entrance (portal) at the land surface. Construction The tunnel is made up of separate elements, each Prefabrication, prefabricated in a manageable length, then having the ends sealed with Bulkhead (partition), bulkheads so they can be floated. At the same time, the corresponding parts of the path of the tunnel are prepared, with a trench on the bottom of the channel being dredged and graded to fine tolerances to support the elements. The next ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Federal Highway Administration
The Federal Highway Administration (FHWA) is a division of the United States Department of Transportation that specializes in highway transportation. The agency's major activities are grouped into two programs, the Federal-aid Highway Program and the Federal Lands Highway Program. Its role had previously been performed by the Office of Road Inquiry, Office of Public Roads and the Bureau of Public Roads. History Background With the coming of the bicycle in the 1890s, interest grew regarding the improvement of streets and roads in America. The traditional method of putting the burden on maintaining roads on local landowners was increasingly inadequate. In 1893, the federal Office of Road Inquiry (ORI) was founded; in 1905, it was renamed the Office of Public Roads (OPR) and made a division of the United States Department of Agriculture. Demands grew for local and state government to take charge. With the coming of the automobile, urgent efforts were made to upgrade and moderniz ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
