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About Project

About Project

Tanahu Hydropower Limited (THL) is a subsidiary companyofNepalElectricityAuthority(NEA) established in 2012 to develop 140 MW Tanahu Hydropower Project ("the Project") (formerly, Upper Seti Hydropower Project). The Project site is situated 150 km west of Kathmandu on Seti River near Damauli of Tanahu District in Gandaki Zone.
 
The Project is the storage type hydropower project with the capacity of 140MW with an estimated average annual energy generation of 587.7 GWh (Years 1-10) and 489.9 GWh (Year 11 onwards). The Project is situated on Seti river of Vyas municipality near Damauli, the district headquarter of Tanahun District. Eight VDCs and Vyas municipality of Tanahun district are directly affected by the project. The estimated cost of the Project is US$ 505 million.
 
The main components of the Project are 140 m high concrete gravity dam with crest length of 175m on the Seti River and reservoir with a total surface area of 7.26 km2. The elevation of Full Supply Level(FSL) is 415m above sea level. The waterway consists of 7.4 m diameter and 1,203m long headrace tunnel on the right bank for the river. An underground powerhouse measuring 27m wide x 46m high x 97m long will be built approximately 6 km (along the river course) downstream of the dam site. A 190 m long tailrace tunnel will discharge the tail water back into the Seti River. Two permanent and primary access roads (totaling 7.3 km) and several temporary and secondary access roads will provide access to the Project area. Temporary facilities include contractor's camps, equipment and maintenance yard, office areas, project staff's camp area, Construction Power Sub-station etc.
 
The project area covers 8 Village Development Committees (VDCs) and Vyas Municipality. The VDCs are (i) Chhang, (ii) Majhkot, (iii) Bhimad, (iv) JamuneBhanjyang, (v) Kotdarbar, (vi) RishingRanipokhari, (vii) SabhungBhagawatipur, and (viii) KahuShivapur. The Vyas Municipality, with Damauli Town as district headquarter of Tanahun district, is a major urban settlement. The reservoir will extend about 25 km upstream inundating the low-lying lands (415 m) along the Seti River. The Project will also include Rural Electrification (RE) and Transmission Lines (TL) component. A new 220 kV double circuits TL will evacuate the generated power to the new Bharatpur Substation.The length of the transmission line corridor is 37 km. Additionally, The Project will electrify 18 VDCs through its Rural Electrification (RE) Program.
 
THL signed the contract agreement with M/S Lahmeyer International in association with Manitoba Hydro. International, Canada (“the Consultant”) as Project Supervision Consultant (PSC)on June 29, 2015. The contract period of PSC is twelve years. The consultant will assist one year for pre-construction activities, six years for project construction and last five years for project operation and maintenance.