Middle Mewa Hydropower Project 

Project in brief

Located at a distance of 700 Km northeast of Kathmandu, Middle Mewa HPP 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 18.76 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. 

Progress Updates

Civil Works

  1. ● Headworks excavation works completed.
  2. ● High-pressure jet grouting at right side dam completed, ongoing at intake and left side dam.
  3. ● Jet grouting pile integrity test completed at right side dam.
  4. ● Pile load test and Composite load test completed successfully.
  5. ● Concrete works at the headpond, settling basin and spillway ongoing.
  6. ● Rebar and formwork works at the right side dam ongoing.
  7. ● Cutoff wall percussion drilling and concrete work completed on 5 panels out of 6, last panel concrete planned for November.
  8. ● Headrace tunnel 5209m length excavation works completed out of 5724m length.
  9. ● Concrete infill work at the vertical shaft is ongoing.
  10. ● Powerhouse excavation and all three unit turbine second stage concreting works completed.
  11. ● Tailrace tunnel invert and shear wall concreting works completed.
  12. ● Switchyard foundation and protection works ongoing

Hydromechanical Works

●  Fabrication of first-stage and second-stage embedded parts of settling basin inlet-outlet gateand stop logs, settling basin flushing gates and stop logs, turbine outlet gate, release andscouring sluice stop logs, gravel flushing gates/stop logs completed.
● Fabrication of second stage embedded parts of scour and release sluice radial gates completed.
● Fabrication works of Bifurcations are completed and Bellmouth in progress.
● Penstock pipe steel plates 1260 MT delivered to the site and fabrication works for penstocks in progress.
● Fabrication of 747.92m penstock pipe completed.
● Erection of penstock pipe at upper-pressure tunnel ongoing, 121.85 m completed.
● Erection of penstock pipe at intermediate pressure tunnel ongoing, 70 m completed.
● Erection of 210.54 m of penstock pipe at vertical shaft-1 and bend 4 completed.
● Erection of 7 m of penstock pipe at bend 6 and 133.5 m of penstock pipe at vertical shaft-2 completed.
● Erection of 24.65 m of branch penstock pipe at LPT competed.

, , Electromechanical Works

 Manufacturing of all major equipment completed and delivered to site.
● Turbine housing/bifurcation installation for all three units along with second stage concreting completed.
● Installation of turbine nozzles of all three units completed.
● Installation of Unit-1 Turbine runner ongoing.
● Installation of all three MIVs completed.
● Installation of all three units of generators completed.
● Three units main Transformer installation completed.
● Bus duct installation ongoing.
● 11kV switchgear panels, LVAC panels, DC system panels, cable trays manufactured and reached at site. Installation ongoing.
● Switchyard equipment like Lightning Arrestors, Circuit Breakers, Current Transformer, Potential Transformers, Disconnecting Switches, etc. reached site. Installation of the steel structures and switchyard equipment is ongoing.
● Installation of three numbers of 132kV bays completed.

Transmission Line Works

All transmission line tower stubs, tower sets and accessories delivered to the site store.
● Excavation for 33 tower foundation completed, ongoing in 1 tower.
● Concrete works completed for 33 tower foundations.
● Tower erection completed for 26 towers.
● Tower protection works completed for 7 towers and ongoing for remaining towers