Bering Strait crossing

, Russia, is on the left, the two Diomede Islands are in the middle, and Cape Prince of Wales, Alaska, is on the right. 19th century The concept of an overland connection crossing the Bering Strait goes back to the 19th century. William Gilpin, first governor of the Colorado Territory, envisaged a vast "Cosmopolitan Railway" in 1890 that would connect the entire world through a series of railways. Two years later, Joseph Strauss, who went on to design over 400 bridges and then serve as the project engineer for the Golden Gate Bridge, put forward the first proposal for a Bering Strait rail bridge in his senior thesis. The project was presented to the government of the Russian Empire, but it was rejected. 20th century In 1904, a syndicate of American railroad magnates proposed (through a French spokesman) a SiberianAlaskan railroad from Cape Prince of Wales in Alaska through a tunnel under the Bering Strait and across northeastern Siberia to Irkutsk via Cape Dezhnyov, Verkhnekolymsk, and Yakutsk (around of railroad to build, plus over in North America). The proposal was for a 90-year lease and exclusive mineral rights for on each side of the right-of-way. It was debated by officials and finally turned down on March 20, 1907. Czar Nicholas II approved the American proposal in 1905 (only as a permission, not much financing from the Czar). Its cost was estimated at $65 million and $300 million, including all the railroads. There was a Nazi plan to create a wide-gauge railroad called the Breitspurbahn to connect the cities of Europe, India, China, and ultimately North America via the Bering Strait. Interest was renewed during World War II with the completion in 19421943 of the Alaska Highway, linking the remote territory of Alaska with Canada and the continental United States. In 1942, the Foreign Policy Association envisioned the highway continuing to link with Nome near the Bering Strait, linked by highway to the railhead at Yakutsk, using an alternative sea-and-air ferry service across the Bering Strait. At the same time, the road on the Russian side was extended by building the Kolyma Highway. In 1958, engineer Tung-Yen Lin suggested the construction of a bridge across the Bering Strait "to foster commerce and understanding between the people of the United States and the Soviet Union." Ten years later, he organized the Inter-Continental Peace Bridge, Inc., a nonprofit institution organized to further this proposal. In 1994, he updated the cost to more than $4 billion. Like Gilpin, Lin envisioned the project as a symbol of international cooperation and unity, and dubbed the project the Intercontinental Peace Bridge. 21st century According to a report in the Beijing Times in May 2014, Chinese transport experts had proposed building a roughly high-speed rail line from northeast China to the United States. The project would include a tunnel under the Bering Strait and connect to the contiguous United States via Wales, Alaska, along the river to Fairbanks, Alaska, and along the Alaska Highway to Edmonton, Alberta, Canada. Several American entrepreneurs have also advanced private-sector proposals, such as an Alaska-based limited-liability company, InterBering, founded in 2010 to lobby for a cross-straits connection, and a 2018 cryptocurrency offering to fund the construction of a tunnel. In 2005, investor Neil Bush, younger brother of U.S. President George W. Bush and son of President George H. W. Bush, traveled abroad with Sun Myung Moon of the Unification Church as he promoted a proposal to dig a transportation corridor beneath the Bering Strait. When questioned by Mother Jones during the Republican primary campaign of his brother Jeb Bush a decade later in 2015, he denied having supported the tunnel project and said that he had traveled with Moon because he supported "efforts by faith leaders to call their flock into service to others." ==Strategic military concerns==

Proposals to construct a strait crossing predate the 2022 Russian invasion of Ukraine and the Russo-Ukrainian war, which began in February 2014. Russia's actions have raised serious scepticism about its possible realization in the near future, especially regarding the proposed crossing's impact on the national security of the United States and Canada, considering that such a bridge or a tunnel would effectively enable Russian armed forces, paramilitary troops, spies, and saboteurs to gain a land bridge directly to North America. Even before the beginning of the Russian invasion of Ukraine, commentators on the proposed link have flagged strategic military concerns as a factor in any decision to build the crossing. ==Technical concerns==

Geologic faults Several major geologic faults run through the Bering Strait region, although some are offshore, and their exact offshore extent is still debated. Key faults include the Kaltag and Bendeleben faults on land, and the Bering Fracture Zone offshore, which is the site of significant seismic activity and tectonic plate boundaries. Distance The straight distance between Russia and Alaska is . If the two parts are connected by building a bridge, or, even more likely, a series of bridges, while using the Diomede Islands as intermediate points, the length of the three separate bridges, spanning across water from one island to another, would be at least , or in total. Depth of water The depth of the water is a minor problem, as the strait is no deeper than , In Lin's design, concrete covers all structures to simplify maintenance and to offer additional stiffening. ==Likely route and expenses==

as its western terminus. Bridge option If the bridge is chosen over the tunnel as a type of fixed-link crossing, the most technically and economically feasible option would be to connect Wales, Alaska, to a location south of Uelen. In this case, predictions suggest that the link would likely not consist of a single, uninterrupted bridge but would rather be divided into several bridges that would be interconnected with each other by the Diomede Islands, located in the middle of the Bering Strait. In 1994, Lin estimated the cost of a bridge to be "a few billion" dollars. Connections to the rest of the world This excludes the cost of new roads and railways to reach the bridge. Aside from the technical challenges of building two bridges or a more than tunnel across the strait, another major challenge is that, , there is nothing on either side of the Bering Strait to connect the bridge to. The Russian side of the strait, in particular, is severely lacking in infrastructure. No railways exist for over in any direction from the strait. The nearest major connecting highway is the M56 Kolyma Highway, which is currently unpaved and around from the strait. However, by 2042, the Anadyr Highway is expected to be completed, connecting Ola and Anadyr, which is only about from the strait. On the U.S. side, an estimated of highways or railroads would have to be built around Norton Sound, through a pass along the Unalakleet River, and along the Yukon River to connect to Manley Hot Springs Road – in other words, a route similar to that of the Iditarod Trail Race. A project to connect Nome, from the strait, to the rest of Alaska by a paved highway (part of Alaska Route 2) has been proposed by the Alaskan state government, although the very high cost ($2.3 to $2.7 billion, about $3 million per kilometer, or $5 million per mile) has so far prevented construction. In 2016, the Alaskan road network was extended westwards by to Tanana, from the strait, by building a relatively simple road. The Alaska Department of Transportation & Public Facilities project was supported by local indigenous groups such as the Tanana Tribal Council. Track gauge Another complicating factor is the different track gauges in use. Mainline rail in the US, Canada, China, and the Koreas uses a standard gauge of 1435 millimeters. Russia uses the slightly broader Russian gauge of 1520 mm. Solutions to this break of gauge include: • To have all cargo in containers, which are fairly easily reloaded from one train to another. This is used on the increasingly popular China–Europe rail freight route, which has two breaks of gauge. It is possible to transfer a 60-container train in one hour. • Another solution is variable gauge axles for locomotives and rolling stock, such as those made by Talgo. A gauge changer modifies the gauge of the wheels while the train traverses the GC equipment at a speed of , which is about 4 seconds per railcar. This is faster than is possible with the transfer of ISO containers. ==The TKMWorld Link==

in Russia to the Seward Peninsula in the United States. The Diomede Islands between the two are not shown. The TKMWorld Link (Russian: ТрансКонтинентальная магистраль, English: Transcontinental Railway), also called ICL-World Link (Intercontinental link), was a planned link between Siberia and Alaska to deliver oil, natural gas, electricity, and rail passengers to the United States from Russia. Proposed in 2007, the plan included provisions to build a tunnel under the Bering Strait, which, if built, would have been the longest tunnel in the world, surpassing the Line 3 (Guangzhou Metro) tunnel. The tunnel was intended to be part of a railway joining Yakutsk, the capital of the Russian republic of Yakutia, and Komsomolsk-on-Amur, in the Russian Far East, with the western coast of Alaska. The Bering Strait tunnel was estimated to cost between $10 billion and $12 billion, while the entire project was estimated to cost $65 billion. The cost was estimated as $66 billion. In late August 2011, at a conference in Yakutsk in eastern Russia, the plan was backed by some of President Dmitry Medvedev's top officials, including Aleksandr Levinthal, the deputy federal representative for the Russian Far East. In 2013, the Amur–Yakutsk Mainline connecting the Yakutsk railway ( from the strait) with the Trans-Siberian Railway was completed. However, this railway is meant for freight and is too tightly curved for high-speed passenger trains. Future projects include the and Kolyma–Anadyr highway. The Kolyma–Anadyr highway has started construction, but will be a narrow gravel road. ==USCanadaRussiaChina railway==

In 2014, China was considering the construction of a US-Canada-Russia-China bullet train that would be 13.000 kilometers (8,078 miles) long and would include a underwater tunnel crossing the Bering Strait, allowing passengers to travel between the United States and China in approximately two days. Although the press was skeptical of the project, China's government-run media agency, China Daily, claimed that China possessed the necessary technology. It was unknown who was expected to pay for the construction, although China had, in multiple other construction projects, offered money and assistance to build and finance them; however, upon the projects' completion, it regularly demanded the return of the money through fees or rents. ==Trans-Eurasian Belt Development==

In 2015, another possible collaboration between China and Russia was reported, part of the Trans-Eurasian Belt Development, a transportation corridor across Siberia that would also include a road bridge with gas and oil pipelines between the easternmost point of Siberia and the westernmost point of Alaska. It would link London and New York by rail and superhighway via Russia if it were to go ahead. China's Belt and Road Initiative has similar plans, so the project would work in parallel for both countries. ==See also==