Sai River (Thailand)

Sai River (Thai: แม่สาย or แม่น้ำสาย; RTGS: Mae Sai or Maenam Sai; Thai pronunciation: [mɛ̂ː.sǎːj / mɛ̂ː.náːm.sǎːj]), formerly known as the River of Lawa (Thai: แม่ละว้า; RTGS: Mae Lawa),[1] is a river that forms the natural border between Thailand and Myanmar at Tachileik and Mae Sai Districts. Mae Sai town, where the bridge crossing the international border is located, is named after this river. It is a tributary of the Ruak River, itself a tributary of the Mekong.

Sai River
View of the river swollen by the rainy season
Location
CountryMyanmar and Thailand
Physical characteristics
Source 
 • locationDaen Lao Range, Shan Hills
Mouth 
 • location
Ruak River SE of Tachileik Airport
 • coordinates
20°27′52″N 99°57′17″E
 • elevation
380 m (1,250 ft)

Course

The river has its sources in the Daen Lao Range, in Shan State, Myanmar. Then it flows southeastwards, bending eastwards at the feet of the northern end of the Doi Nang Non ridge before flowing through the Tachileik/Mae Sai urban area, where there is a sign marking the northernmost point of Thailand just east of the border-crossing bridge —at the meeting point of Thailand Route 1 and National Highway 4 (Burma)— over the river. Finally it flows northeastwards before joining the right side of the Ruak River, a tributary of the Mekong, less than 3 kilometres (2 mi) southeast of Tachileik Airport.[2]

References
  1. Chotsukrat, Sa-nguan (2012). Prachum Tamnan Lanna Thai ประชุมตำนานล้านนาไทย [Collection of Thai Lanna Historical Archives] (in Thai). Nonthaburi: Si Panya. p. 112. ISBN 9786167146362.
  2. GoogleEarth


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