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Gotthard Base Tunnel. Central Swiss Alps, Switzerland. 57,104 m (35.483 mi) and 57,017 m (35.429 mi) 2016. Longest conventional railway tunnel. It is also the world's longest transit tunnel by geodetic distance; 55.782 km (34.661 mi) between the two portals. Total 151.84 km (94.35 mi) of broken out tunnels through solid rocks.
St. Clair Tunnel, also opened later in 1890, linked the elements of the Greathead tunnels on a larger scale. [66] In 1906 the fourth Alpine tunnel opened, the Simplon Tunnel, between Switzerland and Italy. It is 19.8 km (12.3 mi) long, and was the longest tunnel in the world until 1982.
The Eisenhower Tunnel, officially the Eisenhower–Edwin C. Johnson Memorial Tunnel, [ 1] is a dual-bore, four-lane vehicular tunnel in the western United States, approximately 60 miles (97 km) west of Denver, Colorado. The tunnel carries Interstate 70 (I-70) under the Continental Divide in the Rocky Mountains. With a maximum elevation of ...
Mule Pass Tunnel, 1,400-ft long, road SR 80, Bisbee, Arizona. Deck Park Tunnel, 2,887-ft twin road tunnels, Interstate 10, Phoenix. Queen Creek Tunnel, 1,200-ft road US 60, just east of Superior. Verde Canyon Railroad Tunnel, 680-foot-long (210 m) railway tunnel, Yavapai County.
The Moffat Tunnel was cut under a shoulder of James Peak. A small pilot tunnel was bored parallel with and 75 feet (23 m) south of the main tunnel to facilitate the work and was eight feet (2.4 m) high and eight feet (2.4 m) wide. [3] [9] In 1925, bad rock at the west end of the tunnel delayed construction, and costs soared.
A slippery slope argument is typically a negative argument where there is an attempt to discourage someone from taking a course of action because if they do it will lead to some unacceptable conclusion. [ 5] Some writers point out that an argument with the same structure might be used in a positive way in which someone is encouraged to take the ...
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Poola Subbaiah Veligonda Project Tunnel - II [66] [61] Andhra Pradesh, India: 18.83 km (11.7 mi) 2021 [needs update] Irrigation Poola Subbaiah Veligonda Project Tunnel - I [66] [61] Andhra Pradesh, India: 18.82 km (11.7 mi) 2020 [needs update] [67] Irrigation Many more tunnels that are shorter than 15 kilometres (9 mi) are under construction