Tamakoshi River

The Tamakoshi River (Nepali: तामाकोशी) is part of the Koshi or Sapta Koshi river system in Nepalese Himalayas. It originates from the Rongshar Chu [zh] (or Rongshar Tsangpo^[1]) and Lapchi Gang rivers close to the Lamabagar Nepal-Tibet border. It flows in a southern direction through Bagmati Province in Nepal, namely through Dolakha District and Ramechhap District.

Tamakoshi
Tamakoshi River at Nayapool
Native name	तामाकोशी (Nepali)
Location
Country	Nepal
Province	Bagmati Province
City	Dolakha District
Physical characteristics
Source	Rongshar Chu and Lapchi Gang
• coordinates	27°57′54″N 86°13′9″E
Mouth	Confluence with Sun Kosi
• coordinates	27°21′6″N 85°58′58″E
Length	92 km (57 mi)
Basin features
Tributaries
• left	Rolwaling Chu, Khimti Khola
• right	Chyadu Khola

Infrastructures

Hydropower

• Just above the confluence of Rolwaling Chu, Upper Tamakoshi Hydroelectric Project has been operating since July 2021; currently it is the largest hydroelectric project in Nepal, with a power output equivalent to two-thirds of Nepal's current power generation.^[2]
• Down the river in the bank, Khimti Power Plant, which was built between 1996 and 2000 is located in Khimti providing 60 MW from Khimti River.^[3][4]
• Sipring Khola Hydropower Station (10 MW)