Glendoe underground hydroelectric power station, Scotland


Scottish and Southern Energy plc

Superior Contractor

Hochtief Glendoe Joint Venture

Construction period

April 2006 – April 2008

Objects description:

  • main access tunnel
  • tailrace tunnel
  • adit tunnel
  • underground powerhouse
  • headrace tunnels

Construction technology:
Tunnel was driven by using drilling and blasting works, by NMT (Norwegian Tunnelling Method).

Executed works:

  • driving of the main access tunnel, profile 43,74 m2, length 1 250 m
  • driving of the tailrace tunnel, profile 43,10 m2, length 315 m
  • driving of adit tunnel, profile 35,80 m2, length 120 m
  • driving of cavern for the powerhouse, height 32,9 m, width 19,5 m, length 46,8 m
  • driving of headrace tunnels, profile 20 m2, length 7 117 m
  • primary support of underground objects by using of steel fibre reinforced shotcrete and rock anchors