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

Geology
Dark limestone phyllite

General data

Project
Gemeinschaftskraftwerk Inn (GKI) Prutz/Ried

Client
Tiroler Wasserkraft (Tirolean Hydropower)/
EKW-OEE/Verbund

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

Construction period
2014 to 2018

Construction costs
€ 56 million

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