Upper Trishiuli 3A Hydroelectric Project

Upper Trishiuli 3A Hydroelectric Project

Upper Trishiuli 3A Hydroelectric Project

 Project Background


Upper Trishiuli 3A Hydroelectric Project (UT3AHEP) is a run of river project with an installed capacity of 60 MW. The project is located in Rasuwa and Nuwakot districts of Bagmati zone with the head works located at Salletar 20 km north of Trishuli bazaar. The construction of this project was initiated in FY 2010/11. This project is under implementation with financing from China Exim Bank, Government of Nepal & Nepal Electricity Authority. An agreement was signed between the Government of Nepal and China Exim Bank for a concessional loan of120 million US Dollars. The estimated cost of the project is 125.775 Million US$ and the loan from China Exim Bank is expected to cover the cost of the major project works including Civil, Electro-Mechanical, Hydro-Mechanical and Transmission Line works. Project Status Contract for the major construction work (Civil, electro-mechanical & hydro-mechanical works) was signed on 28 May 2010 with China Gezhouba Group Company Ltd., China (CGGC) at a cost of 89.1779 Million US$. The Contract has become effective since 1 June 2011 and the construction work going on since then.


Contract for construction supervision of the project has been signed with Northwest Hydro Consulting Engineers, China (NWH) on September 2010. The supervision work had also started since 1st June 2011.






Land acquisition for the major Project work has been basically completed including leasing of land for the temporary facilities. CGGC has completed construction of steel bridge and a pedestrian bridge over Trishuli River, temporary camp at headworks, excavation of 127.5m long adit no.1, 134.5m long adit no.2, 234.6 m long audit no.3 and 109.32m long adit no.4. At headworks, CGGC has completed first phase of river diversion with installation of 2 numbers Gates, construction of Intake works and 106 m of approach channel. Second stage River diversion work was commenced on February 8, 2014. Cable tunnel and access tunnel for underground powerhouse are already completed. Excavation of underground powerhouse cavern excavation, upper and lower drainage tunnel, switch yard and tailrace tunnel has been completed. About 95% of headworks (Intake, weir, stilling basin and gravel trap) concreting work has been completed. About 97% of desander concreting work has also been completed. Excavation of 3867 m out of 4076 m long headrace tunnel (~95%) has been completed together with. About 23% of Concrete lining in the headrace tunnel. Excavation work of vertical and horizontal pressure shaft and about 57% of excavation of surge shaft has been completed. Concreting of draft tube unit-1 & 2 and upper conical part of unit 1 has been completed. Concreting of crane beam and crane installation has been completed. About 33% of concrete lining in the tailrace tunnel has been completed. About 35% of steel lining in penstock branch pipe has been completed. The Transmission line comprises of 44.7 km long 220 kV line from powerhouse switchyard to Matatirtha substation in Kathmandu. In addition about 1 km of 220 kV underground cable route leads to the Matatirtha Substation and two 132 kV line bay extension works will be done for interconnection with existing Matatirtha substation. Contract for the Transmission line work was awarded to China International Water & Energy Corporation (CWE) at a contract price of 22.6 million US$ excluding VAT. The Contract for the transmission line has become effective from 26 February 2012 after the loan agreement between GoN and China Exim Bank was signed on 17 August 2011. 400 km ACSR ‘BISON’ Conductor and Anchor Bolt for tower foundations have already arrived at the site. 132 kV Line bay equipment is ready for dispatch to the site from China. Land acquisition for tower foundation has also been completed and approval for tree cutting has been obtained from the relevant district forest offices. Tree-cutting works has been completed for 6 out of 26 community forest. Till date 34 tower foundation concrete work has been completed and other 10 are on progress. The project has conducted skill enhancement training to 60 persons from which include four school buildings, two water supply systems, upgrading of road from Trishuli to Champani, road improvement to Trishuli hospital, Supply of hospital equipment, Irrigation drain works and pedestrian trail, various village roads in project-affected areas. Through under Public Support Program. Aftermath of the earthquake of 25 April 2015 and 12 May 2015, the access road to the project site, 11 kV transmission line to the headworks and many construction equipment have been heavily damaged. Due to the influence of the earthquake, Contractor has retreated all Chinese labor back to China and dismissed all local labors. Although the access road to Powerhouse has been opened, the access road to surge shaft and headworks are still to be cleared. A high level team shall be mobilized for detail assessment of the damage due to the impact of earthquake project site, which will perform Safety Inspection of the project. Resumption of the construction work shall take place after considering the recommendation of such high level team.

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