Pumped Storage Plant Kühtai

Project objectives

The pumped storage plant Kühtai is an extension of the existing power station group Sellrain-Silz by adding a second upper stage. Thus both utilisation efficiency and total performance coefficient of the power station group will be increased.

Project description

For the environmental impact statement, a specialist report on vibrations and structure borne noise was prepared, outlining the project’s effects during the operational and construction phases. The project, located in the alps, posed special requirements on monitoring equipment. Air quality measurements (PM10, NOx, dust deposition) and meteorological measurements were carried out at two sites to monitor compliance with air pollutant limit values during the construction phase. 

Project data

• Total output of two turbines: 130 MW
• Power generation from natural inflow: 216 million kWh/year
• Natural drainage basin: 7.6 km²
• Drainage basin from collection tunnels: 60.7 km²
• Usable volume, Kühtai basin: 31 million m³
• Collection tunnels: 25.2 km/4.2 m diameter

Services

• Environmental Impact Assessment (EIA) phase: preparation of technical reports & forecasts
• Vibration measurements
• Noise measurements
• Air quality measurements
• Specialist report
• Advising the client on matters relating to vibration and air quality
• Public relations work and responses to statements in the official approval procedures