MC-3 Power House

Construction of Head Race Tunnel (from Surge Shaft end), Surge Shaft, Butterfly Valve Chamber, Pressure Shafts, Power House and Tail Race Tunnel including Hydro-Mechanical works was awarded to M/s Hindustan Construction Company Limited.

   The Contract Package MC-3 consist of the following key components:

  • 10 m dia, 1.5 km long Head Race Tunnel from Surge Shaft end
  • 24.5 m dia, 117 m deep with Orifice Slab, underground Surge Shaft with 40.1m x 31.2 m Dome.
  • 80 m (L) x 12.3 (W) x 21.5 m (H) Butterfly Valve Chamber
  • 99 m (L) x 11.8 m (W) x14 m (H) Ferrule Erection Chamber
  • 6 m dia, 2 nos Steel Lined Pressure Shafts, 1460m long & 6 nos Penstocks of 3.32 m dia
  • 236.5 m (L) x 22.9 m (W) x 53 m (H) Power House Cavern to House 6 (six), 200 MW units
  • 215.7 m (L) x 14.3 m (W) x 26.3 m (H) Transformer Hall Cavern
  • 166 m (L) x 12.6 m (W) x 59m (H) Downstream Surge Gallery Cavern
  • 7 m dia 118 m & 158 m long unit Tail Race Tunnels & 10m dia, 1.3 km long Tail Race Tunnel
  • 5 m (W) x 6.1 m (H), 668 m long D-Shaped Cable Tunnel
  • 8 m (W) x 11 m (H), 52.5 m long, 3 nos D-Shaped Bus Ducts
  • 5.5 m dia, 107 m long, 6 nos. Draft Tube tunnels
  • 200 m (L) x 50 m (W) Pot Head Yard
  • 720 m long Main Access Tunnel to Power House Cavern & 3.7 km long Adits/Access Tunnels to various components
  • 2 nos. Surge Shaft, 6 nos Draft Tube & 2 nos. TRT Outfall Gates

Power House Construction in Pictures

Tail Race Tunnel Outfall
Construction of Blower Room Building
Construction of equipment & tower foundations of Pothead Yard in progress
Fixing of ventilation duct underway in adit to Downstream Surge Gallery
2x6a8059
Surge shaft bottom
Concreting of Piers & wall lining in Downstream Surge Gallery in progress.
Concrete lining of Bus Ducts in progress
Service Bay
Pressure Shaft
Tail Race Tunnel Outfall Construction of Blower Room Building Construction of equipment & tower foundations of Pothead Yard in progress Fixing of ventilation duct underway in adit to Downstream Surge Gallery 2x6a8059 Surge shaft bottom Concreting of Piers & wall lining in Downstream Surge Gallery in progress. Concrete lining of Bus Ducts in progress Service Bay Pressure Shaft

   Special Features/Uniqueness of the Package:

  • The underground Surge Shaft Dome (40.1 x 31.2m) is the biggest Dome in hydropower development in this part of the World.
  • 6m dia. steel-lined Pressure Shafts are one of the biggest underground Shafts constructed in this part of the world.