Technical specifications

Project description

  • Length and Cross-section: power descent,
    inclined shaft approx. 400 m
  • Gradient less than 31%
  • Surge chamber plumb vertical shaft
  • Excavation and securing works, T=100m, Ø 15 m
  • Concrete works vertical shaft, inner Ø 14 m
  • Return Drive (in opposite direction) approx. 1,000 m
  • Concrete works return drive inner lining bottom and roof Access tunnel, caverns

Construction method
Drill and blast method and tunnel excavator

Dark limestone phyllite

General data

Gemeinschaftskraftwerk Inn (GKI) Prutz/Ried

Tiroler Wasserkraft (Tirolean Hydropower)/

Wayss & Freytag Ingenieurbau AG
Southern Division in a joint venture (GKI Prutz/Ried JV)

Construction period
2014 to 2018

Construction costs
€ 56 million

Water/ Sewerage tunnel
Supply tunnel
400 m + approx. 1,000 m
Construction Method
Drill and blast method
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