West Qinling Tunnel
The 19th longest tunnel in the world
The West Qinling Tunnel (pinyin: Xīqínlǐng Suìdào) is in the middle of the Lanzhou–Chongqing railway, crossing the Qinling. It is a 28236 metre dual-bore railway tunnel in Wudu District, Longnan City, Gansu, north-west China. It is the second longest railway tunnel in China, slightly shorter than the New Guanjiao Tunnel. The construction started in August 2008, and went on for a duration of about five months and five years using both Tunnel boring machines (TBM) and drill and blast methods.
Tunnel data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).