Khun Tan Tunnel
The Khun Tan Tunnel is 1362.10 metres long, between kilometre 681.57870 and 682.94080 on the Northern line from Bangkok to Chiang Mai, between Mae Tan Noi, Wiang Tan, and Khun Tan stations. The tunnel runs under the boundary between Lampang and Lamphun Provinces.
Historically the Khun Tan Range was a formidable natural barrier between the Kingdom of Chiang Mai and the Central Plain of Siam. The Khun Tan Tunnel was built in 1907 under the southern part of the range. It reduced the difficulties of travel between the cities of Bangkok and Chiang Mai. The tunnel took eleven years to complete. Construction was disrupted owing to the arrest of its German engineers in World War I.
- From a list of tunnel data provided by the Information Bureau of the State Railway of Thailand
- อุโมงค์รถไฟถ้ำขุนตาน จากเว็บไซต์สำนักงานสรรพากรพื้นที่ลำพูน]
- The White Bridge: Celebrating the 80th birthday of His Majesty King Bhumibol
- Historical Thai Railroads/SRT News 2003-2006
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