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A Bering Strait crossing is a hypothetical bridge or tunnel that would span the relatively narrow and shallow Bering Strait between the Chukotka Peninsula in Russia and the Seward Peninsula in the U.S. state of Alaska. The crossing would provide a connection linking the Americas and Afro-Eurasia.
Crossing the Red River near Granite, Oklahoma in 1921 Crossing the Milkhouse ford through Rock Creek in 1960 A ford next to a bridge that can only support 1.5 tonnes in Aufseß, Germany. A ford is a shallow place with good footing where a river or stream may be crossed by wading, or inside a vehicle getting its wheels wet. [1]
This type of crossing is much cheaper to build than a high bridge that keeps the road surface consistently above the highest water level, and is usually deployed in semi-arid areas where high-volume rainfall is rare and the existing channel is shallow (which requires extra ramping on the banks to build a more elevated bridge and thus costs more ...
The Bering Strait has been the subject of the scientific theory that humans migrated from Asia to North America across a land bridge known as Beringia when lower ocean levels – a result of glaciers locking up vast amounts of water – exposed a wide stretch of the sea floor, [1] both at the present strait and in the shallow sea north and ...
Several engineers have designed bridges on various alignments and with differing structural configurations. A proposal by Professor T.Y. Lin for a crossing between Point Oliveros and Point Cires featured deep piers, a length of 14 kilometres (9 miles), 910-metre-tall (3,000 ft) towers, and a 5,000-metre (16,000-foot) span, more than twice the length of the current longest bridge span. [5]
Historical map of Adam's Bridge and environs, before the cyclone of 1964 Pearl fishing in the Gulf of Mannar, c. 1926. In the vicinity of Adam's Bridge/Rama Setu, the water is typically only 1–3 m (3 ft 3 in – 9 ft 10 in) deep. [5] Due to the shallow waters, Adam's Bridge presents a formidable hindrance to navigation through the Palk Strait.
The original Tacoma Narrows Bridge was the first to be built with girders of carbon steel anchored in concrete blocks; preceding designs typically had open lattice beam trusses underneath the roadbed. [26] This bridge was the first of its type to employ plate girders (pairs of deep I-beams) to support the roadbed. [26]
A pontoon bridge (or ponton bridge), also known as a floating bridge, uses floats or shallow-draft boats to support a continuous deck for pedestrian and vehicle travel. The buoyancy of the supports limits the maximum load that they can carry.