List of longest tunnels

Columns: Type | Name | Location | Length | Year | Comment
Mineral transportation | Woodsmith Mine Tunnel Potash Project Mineral Transport System ( MTS ) | North York Moors , United Kingdom | 36,700 m ( 22.8 mi ) | 2021 | 6 m in diameter incorporating conveyor and maintenance access . Start of construction was planned for 2016 , but actually started in April 2019 | Railway | Gaoligongshan Tunnel | Yunnan , China | 34,586 m ( 21.5 mi ) | 2022 | Railway between Dali and Ruili . Construction started in August 2017 | Railway Twin Tube | Koralm Tunnel | Koralpe , Austria | 32,900 m ( 20.4 mi ) | 2025 | Part of Koralm Railway ; boring of main tunnel started at the west portal May 2010 | Railway Twin Tube | Semmering Base Tunnel | Lower Austria / Styria , Austria | 27,300 m ( 17.0 mi ) | 2026 | Construction of the first contract section started January 2014 . Will cut travel time between Vienna and Graz by 30 minutes and is part of the Baltic-Adriatic Corridor | Road | Rogfast | Harestad - Arsvågen , Norway | 26,700 m ( 16.6 mi ) | 2026 | Construction started in January 2018 . Will be the longest road tunnel in the world , and also the deepest undersea tunnel , 392 meters below sea level | Water Supply | Melamchi Water Tunnel | Melamchi to Kathmandu , Nepal | 26,000 m ( 16.2 mi ) | 2015 ( ? ? ) | Under construction , financed by Asian Development Bank | Railway | Musil Tunnel | Wonju - Jecheon ( Jungang Line ) , South Korea | 25,080 m ( 15.6 mi ) | 2018 | Work slated to start June 2011

Example questions:
What was dedicated in 1952 in the same area as the tunnel also known as the Mineral Transport System ? | How many tunnels will the tunnel that will be the longest railway tunnel of a landlocked East Alpine country have ? | What is the population of the country that has the tunnel with the predominately underground motorway scheme ? | How many kilometres are being built underground of the tunnel in the country that is 450,295 square kilometres ?

Answers:
North York Moors National Park | two | 26 million | 17