Salient Feature

1. General Information

  • Capacity: 42 MW
  • Type of Scheme: Peaking Run-off-River (RoR)
  • River: Lapche Khola
  • Province: Bagmati
  • District: Dolakha
  • Project Location: Bigu Rural Municipality

2. Hydrology

  • Catchment Area: 644.85 Km²
  • Design Discharge: 17.70 m³/s (Q 42.7%)
  • Design Flood Discharge: 527 m³/s (100 Yrs. Flood)

3. Headworks

  • Type of Weir: Barrage
  • Barrage Length: 18 m
  • Barrage FSL level: 2367.00 m amsl
  • Barrage MDDL Level: 2362.00 m amsl
  • Barrage 100 yrs High Flood Level: 2368.75 m amsl
  • Barrage gate size: 5.5 m x 6 m (WxH)
  • Sluice Opening Nos: 1
  • Sluice Opening Size: 3m x 6m (W x H)
  • Intake and Gravel Trap Size: 3.5 m x 2.5 m (W x H)
  • Intake Nos: 3 nos
  • Gravel Trap (L x W): 20 m x Avg. 9 m (L x W)
  • Conveyance tank Size (L x W): 19 m x Avg. 9 m (L x W)

4. Waterways

  • Headrace Tunnel:
    • Type: Inverted D-shaped
    • Size: 4.20 m x 4.20 m (Excavation diameter)
    • Length: 2380 m (Upto vertical shaft including tunnels from each settling bays)