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2. Wrights tunnel - Wikipedia

   en.wikipedia.org/wiki/Wrights_Tunnel

   The tunnel was repaired thereafter and widened to make way for standard gauge trains, which would begin using the tunnel in 1909. The western portal was also replaced due to the earthquake and a brick ceiling was installed for the first three hundred feet of the tunnel to prevent collapse from the sandstone present there. The brick ceiling is ...

3. Woodhead Tunnel - Wikipedia

   en.wikipedia.org/wiki/Woodhead_Tunnel

   Woodhead 2 was completed in 1853. Both tunnels were difficult to maintain because of their narrowness and heavy traffic, estimated to be around 250 trains per day in either direction. As both tunnels were too narrow to allow for electrification, it was decided to construct a third tunnel in the 1950s. Woodhead 3 opened in 1953, almost 100 years ...

4. Lötschberg railway - Wikipedia

   en.wikipedia.org/wiki/Lötschberg_railway

   For the construction of the Lötschberg line and the main tunnel two special railways had to be constructed to bring material from Frutigen or the junction at Naters near Brig to the portals of the Lötschberg tunnel. The gauge of the railways was 750 mm (2 ft 5 + 1 ⁄ 2 in), the maximum gradient was 60 per thousand (6%) and the minimum curve ...

5. Kingwood Tunnel - Wikipedia

   en.wikipedia.org/wiki/Kingwood_Tunnel

   Dangerous rock conditions at the east end of the tunnel and accidents with black powder caused many casualties, with a total of about 30 deaths and 300 injuries in the excavation of the Kingwood Tunnel and the contemporaneous Board Tree Tunnel on the same line. [1] The west portal of the original tunnel in 1974

6. List of tunnels in the United Kingdom - Wikipedia

   en.wikipedia.org/wiki/List_of_tunnels_in_the...

   Great Northern Railway. West tunnel Up & Down Slow, Central tunnel Up & Down Fast, East Tunnel disused since 1977: 1877, 1850, 1886: London: Crossrail Royal Oak Portal to Victoria Dock portal: Railway: 15,390: 16,830: Twin tunnels 6.2m in diameter [45] 2022: London: Crossrail Pudding Mill Lane Portal to Stepney Green: Railway: 2,720: 2,974 ...

7. Gallitzin Tunnel - Wikipedia

   en.wikipedia.org/wiki/Gallitzin_Tunnel

   Gallitzin Tunnel 0 (1 track 1904-1995), Allegheny Tunnel 2 (1 track 1904-1995), New Portage Tunnel 1 (2 tracks 1898-1971) Track gauge: 4 feet, 8 and one-half inches (56.5 inches) Highest elevation: Gallitzin and Allegheny Tunnels 2,167 feet (at west tunnel portals), New Portage Tunnel 2,198 feet (at AR tower west of west tunnel portal)