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- Otira_Tunnel abstract "The Otira Tunnel is a railway tunnel on the Midland Line in the South Island of New Zealand, between Otira and Arthur's Pass. It runs under the Southern Alps from Arthur's Pass to Otira - a length of over 8.5 kilometres (5.3 mi). The gradient is mainly 1 in 33, and the Otira end of the tunnel is over 250 m (820 ft) lower than the Arthur's Pass end. Construction started in 1907 and it opened on 4 August 1923; at the time of its construction, it was one of the longest tunnels in the world.Because of its length and gradient, gases such as carbon dioxide and carbon monoxide could easily build up, potentially making the tunnel both unhealthy for the train's occupants and unworkable with steam engines. Thus, the tunnel was electrified with a 1500V DC overhead system. A small coal-fired power station was built near Otira to provide electricity until 1941, when it was replaced by a connection to the national grid. The locomotives used were the EO class, then from 1968 the EA class.Because of the increasing age of the electrification and the availability of upgraded DX Class diesel locomotives, the electrification was decommissioned in 1997 and the equipment removed. This marked the end of electrification in the South Island.To overcome the fume problem, a combination of a door and fans is used, similar to that used in the Cascade Tunnel in the USA, which was also once electrified. After a train enters the tunnel from the Otira end the door closes off the entrance, and a large fan extracts the fumes behind the train. Once the fumes have been extracted, the door is reopened. Because of the fumes, the TranzAlpine's observation cars are closed for the trip through the tunnel.".
- Otira_Tunnel lineLength "8566.0".
- Otira_Tunnel location South_Island.
- Otira_Tunnel location Southern_Alps.
- Otira_Tunnel openingDate "1923-08-04".
- Otira_Tunnel openingYear "1923".
- Otira_Tunnel operatedBy KiwiRail.
- Otira_Tunnel operatedBy KiwiRail_Scenic_Journeys.
- Otira_Tunnel owner KiwiRail.
- Otira_Tunnel railGauge "1.067".
- Otira_Tunnel railwayLineUsingTunnel Midland_Line,_New_Zealand.
- Otira_Tunnel routeEndLocation Arthur's_Pass.
- Otira_Tunnel routeStartLocation Otira.
- Otira_Tunnel routeStartLocation West_Coast_Region.
- Otira_Tunnel thumbnail Otira_Tunnel_(Arthur's_Pass),_ca_1910.jpg?width=300.
- Otira_Tunnel wikiPageExternalLink itemdetail.cfm?itemid=63.
- Otira_Tunnel wikiPageExternalLink Gov01_04Rail-fig-Gov01_04Rail033a.html.
- Otira_Tunnel wikiPageExternalLink Gov01_05Rail-fig-Gov01_05Rail038a.html.
- Otira_Tunnel wikiPageExternalLink Gov01_07Rail-fig-Gov01_07Rail074a.html.
- Otira_Tunnel wikiPageExternalLink Gov01_10Rail-fig-Gov01_10Rail022a.html.
- Otira_Tunnel wikiPageExternalLink Gov03_01Rail-fig-Gov03_01Rail039a.html.
- Otira_Tunnel wikiPageExternalLink tei-Gov03_01Rail-t1-body-d18.html.
- Otira_Tunnel wikiPageID "5551049".
- Otira_Tunnel wikiPageRevisionID "588442172".
- Otira_Tunnel caption "Otira Tunnel during construction, ca 1910".
- Otira_Tunnel character "Single bore rail tunnel".
- Otira_Tunnel coordinates "East portal:".
- Otira_Tunnel coordinates "North portal:".
- Otira_Tunnel end Arthur's_Pass.
- Otira_Tunnel end Canterbury_Region.
- Otira_Tunnel gauge "1067.0".
- Otira_Tunnel hasPhotoCollection Otira_Tunnel.
- Otira_Tunnel line Midland_Line,_New_Zealand.
- Otira_Tunnel linelength "8566 m".
- Otira_Tunnel location "Southern Alps, South Island, New Zealand".
- Otira_Tunnel name "Otira Tunnel".
- Otira_Tunnel open "1923-08-04".
- Otira_Tunnel operator KiwiRail.
- Otira_Tunnel operator KiwiRail_Scenic_Journeys.
- Otira_Tunnel owner KiwiRail.
- Otira_Tunnel start Otira.
- Otira_Tunnel start West_Coast_Region.
- Otira_Tunnel subject Category:Rail_transport_in_the_West_Coast_Region.
- Otira_Tunnel subject Category:Railway_tunnels_in_New_Zealand.
- Otira_Tunnel subject Category:Tunnels_completed_in_1923.
- Otira_Tunnel subject Category:Westland_District.
- Otira_Tunnel point "-42.8625 171.5487".
- Otira_Tunnel type Artifact100021939.
- Otira_Tunnel type Object100002684.
- Otira_Tunnel type Passage103895293.
- Otira_Tunnel type Passageway103895585.
- Otira_Tunnel type PhysicalEntity100001930.
- Otira_Tunnel type RailwayTunnelsInNewZealand.
- Otira_Tunnel type Tunnel104497962.
- Otira_Tunnel type TunnelsCompletedIn1923.
- Otira_Tunnel type TunnelsInNewZealand.
- Otira_Tunnel type Way104564698.
- Otira_Tunnel type Whole100003553.
- Otira_Tunnel type YagoGeoEntity.
- Otira_Tunnel type YagoPermanentlyLocatedEntity.
- Otira_Tunnel type ArchitecturalStructure.
- Otira_Tunnel type Infrastructure.
- Otira_Tunnel type Place.
- Otira_Tunnel type RailwayTunnel.
- Otira_Tunnel type RouteOfTransportation.
- Otira_Tunnel type Wikidata:Q532.
- Otira_Tunnel type Place.
- Otira_Tunnel type Location.
- Otira_Tunnel type _Feature.
- Otira_Tunnel type SpatialThing.
- Otira_Tunnel comment "The Otira Tunnel is a railway tunnel on the Midland Line in the South Island of New Zealand, between Otira and Arthur's Pass. It runs under the Southern Alps from Arthur's Pass to Otira - a length of over 8.5 kilometres (5.3 mi). The gradient is mainly 1 in 33, and the Otira end of the tunnel is over 250 m (820 ft) lower than the Arthur's Pass end.".
- Otira_Tunnel label "Otira Tunnel".
- Otira_Tunnel label "Otira-Tunnel".
- Otira_Tunnel sameAs Otira-Tunnel.
- Otira_Tunnel sameAs m.0ds49l.
- Otira_Tunnel sameAs Q2037030.
- Otira_Tunnel sameAs Q2037030.
- Otira_Tunnel sameAs Otira_Tunnel.
- Otira_Tunnel lat "-42.8625".
- Otira_Tunnel long "171.5487".
- Otira_Tunnel wasDerivedFrom Otira_Tunnel?oldid=588442172.
- Otira_Tunnel depiction Otira_Tunnel_(Arthur's_Pass),_ca_1910.jpg.
- Otira_Tunnel isPrimaryTopicOf Otira_Tunnel.
- Otira_Tunnel name "Otira Tunnel".