Kok River, Mae Ai District, Chiang Mai Province
Map of the Thai highlands
|State||Shan State, Chiang Mai Province, Chiang Rai Province|
|District||Mae Ai, Mueang Chiang Rai, Mae Chan, Wiang Chai, Chiang Saen|
|City||Chiang Rai city|
|⁃ location||Daen Lao Range, Shan State, Burma|
|Sop Kok, Wiang Chai, Chiang Rai Province|
|358 m (1,175 ft)|
|Length||285 km (177 mi)|
|Basin size||10,875 km2 (4,199 sq mi)|
|⁃ location||Chiang Rai city|
|⁃ average||120 m3/s (4,200 cu ft/s)|
|⁃ minimum||5 m3/s (180 cu ft/s)|
|⁃ maximum||848 m3/s (29,900 cu ft/s)|
|⁃ location||Sob Kok|
|⁃ average||170 m3/s (6,000 cu ft/s)|
|⁃ right||Fang, Lao River|
The river originates in the Daen Lao Range, Shan State, Myanmar. It flows eastwards across the Myanmar-Thailand border, crossing at the Thai border town of Tha Ton (Thai: ท่าตอน, also spelled "Thaton" ). It flows to Mae Ai District, Chiang Mai Province. Most of its length in Thailand is in Chiang Rai Province where it passes Mueang Chiang Rai District after which it bends northeastwards and flows through Mae Chan, Wiang Chai and Chiang Saen districts.
It is a wide, shallow, and slow-moving river. There is about 600 metres (2,000 ft) of small-scale whitewater halfway between the towns of Tha Ton and Chiang Rai.
For several kilometres downriver from Chiang Rai, the river becomes a lake, until it reaches the irrigation dam near Wiang Chai.
Phahonyothin Road crosses this river near Chiang Rai City. Altogether, there are five bridges crossing the Kok River near Chiang Rai city.
There is a small dam with 11 gates which provides irrigation for rice fields east of Chiang Rai. The dam is 11 kilometres (7 mi) east of the Hwy 1 bridge. It turns the river into a lake, several miles long, for eight months of the year. Additionally, there is a dam planned on the Burmese side of where the river flows into Thailand, about 32 kilometres (20 mi) upstream from the border.
In October 2013 the cast and crew of the British television show Top Gear constructed a bridge over the Kok as part of their Burma Special. The bridge was originally planned to be built over the River Kwai, but the River Fang which flows into the Kok was chosen "accidentally". The show aired in two parts on 9 March 2014 and 16 March 2014.
- Tue Kell Nielsen, Kok River Basin, North Thailand
- Kok River Basin Archived 2016-01-13 at the Wayback Machine
- "Khiri Travel and Asia Film Fixers Make Top Gear Myanmar a Reality". Khiri Travel. 13 March 2014. Archived from the original on 2014-03-17. Retrieved 17 March 2014.
- "Top Gear: Trucking in Burma". AFF. 2014. Retrieved 17 March 2014.
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