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3 天前 · The Baltimore Harbor (1957) and Fort McHenry (1985) tunnels and Francis Scott Key Bridge (1977) cross the Patapsco River. The Francis Scott Key Bridge collapsed on March 26, 2024, after being struck by a ship. There is a dense network of interstate
- The Editors of Encyclopaedia Britannica
Truss bridge, bridge with its load-bearing structures composed of a series of wooden or metal triangles, known as trusses. Trusses are capable of supporting considerable external loads over a large span and use a relatively small amount of material, making them particularly useful for railroad and military bridges.
- The Editors of Encyclopaedia Britannica
2024年4月26日 · It was opened to traffic in 1952 and is 4 miles (6.4 km) long. The Chesapeake Bay Bridge-Tunnel was completed across the lower bay in 1964. The bay forms part of the Atlantic Intracoastal Waterway. Baltimore is the chief port on the upper (northern) portion of
- The Editors of Encyclopaedia Britannica
Warren truss bridge. Pratt truss bridge. truss bridge, bridge with its load-bearing structures composed of a series of wooden or metal triangles, known as trusses. Given that a triangle cannot be distorted by stress, a truss gives a stable form capable of supporting considerable external loads over a large span.
Mason-Dixon Line, originally the boundary between Maryland and Pennsylvania in the United States. In the pre-Civil War period it was regarded, together with the Ohio River, as the dividing line between slave states south of it and free-soil states north of it. Learn more about the Mason-Dixon Line.
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United States. Participants: United Kingdom. United States. Context: War of 1812. The Star-Spangled Banner. Battle of Baltimore, (12–14 September 1814), land and sea battle of the War of 1812 that spurred the writing of the “The Star-Spangled Banner,” the U.S. national anthem.
2024年5月17日 · The Chesapeake Bay Bridge-Tunnel, Virginia. Chesapeake Bay Bridge-Tunnel, complex of trestles, artificial islands, tunnels, and bridges that runs across the entrance to Chesapeake Bay in Virginia, providing a vehicular roadway between the Norfolk–Hampton Roads area (southwest) and Cape Charles at the tip of the Delmarva Peninsula ...
