Middle Mewa Hydropower Project - 73.5 MW

Project Developed By
Salient Features
  • Installed capacity: 73.5 MW
  • Project Location: Mikhwa Khola & Meringden Rural Municipality, Taplejung district, Province - 1
  • Type of Scheme: Peaking Run-of-River (PRoR)
  • Gross Head: 475 m
  • Net Rated Head: 464.5 m
  • Design Discharge: 19.02 m3/s
  • Net Annual Energy: 432.31 GWh
  • Headrace tunnel: 5430 m
  • Power Evacuation to: Dhungesanghu Substation (Approx. 11 km from Powerhouse)
Project Brief

Located at a distance of 700 Km northeast of Kathmandu, Middle Mewa Hydropower project is one of the very few Peaking Run of River (PROR) type projects in Nepal. The project is proposed in Mewa river in Taplejung District of eastern Nepal. The project shall utilize the design discharge of 12.56 m3/s to generate 73.5 MW of electricity with daily peaking of 6 hours. The project is accessible through a 32 km of access road from Banande Bazar located at Mechi Highway. After the award of civil contract on January 2020, mobilization of civil works contractor commenced. Infrastructure works and site enabling works has been completed and construction works are ongoing in a full-fledged manner from multiple work fronts.


Progress Updates

Project Studies and Approval

  • Initial Environmental Examination (IEE) study report approved; Environmental Impact Assessment (EIA) for 73.5 MW ongoing
  • Detailed Engineering Design completed and preparation of construction drawings ongoing concurrently
  • Sediment sampling and laboratory analysis completed
  • Physical Modeling of headworks structures completed
  • Contract Awarded for Transmission line
  • Contract Awarded for Hydromechanical works
  • Contract Awarded for Electromechanical works

Physical Works

•    All the site-enabling works and supporting infrastructure is completed
•    33 kV transmission line for construction power supply completed
•    Civil works contractor mobilization commenced in January 2020; Construction works advancing from different work fronts
•    Diversion Tunnel completed and river diversion commenced
•    Excavation work at the headworks area completed
•    Construction works at headworks started; Grouting tunnels works ongoing
•    Jet grouting in Desander area has been started
•    Slope protection work is completed at the Settling Basin area
•    Adit-1 tunnel, Adit-2 tunnel , Adit-3 tunnel, Adit-4 tunnel, Ventilation tunnel, Intermediate Pressure Tunnel, Lower Pressure Tunnel, and Upper-          Pressure Tunnel completed
•    3167 m Headrace tunnel has been excavated out of 5314 m
•    Pilot hole for the Surge shaft has been completed; Widening and support work ongoing
•    Pilot holes of Vertical Shaft 1 and Vertical Shaft 2 completed; Widening and excavation works of Vertical Shaft 1 completed whereas works for Vertical Shaft 2 ongoing;
•    Main Access Tunnel to Powerhouse completed
•    Powerhouse cavern excavation completed; Installation of Earthing and grounding system has been installed; Rebar placing at bottom raft of Turbine pit ongoing
•    Excavation of Tailrace tunnel completed including 3 branch tunnels
•    Detailed design of Electromechanical works ongoing; Earthing and Grounding system has been delivered; Bus duct is planned to be dispatched shortly
•    Detailed design of Hydromechanical works ongoing; Bifurcation and Penstock pipe fabrication will start shortly
•    Soil investigation completed for 132 KV Transmission line; Detail Design of Towers and Foundation work in final stage; Foundation works have been started

 

Key Milestones
Power Purchase Agreement - Aug 2018

Power Purchase Agreement was signed with Nepal Electricity Authority in August 2018.

Financial closure - Nov 2019

Financial closure was concluded in November 2019 with Himalayan Bank Ltd. as a lead bank, Nepal Infrastructure Bank Ltd. as a Co-lead bank and Kumari Bank Ltd., Nepal SBI Bank Ltd., NCC Bank Ltd., and Sanima Bank Ltd. as member banks.

Generation License -  Jan 2020

Generation License was obtained from the Department of Electricity Development in January 2020.

Start of construction - Jan 2020

The project embarked on construction in January 2020 after the award of civil works contract to CE construction.

Project Commissioning - Oct 2023

The project is advancing in a full-fledged manner to meet the target project commissioning date of October 2023.

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