Power plant Parbati III

Underground Mining Power station construction

Cavern power plant, pressure shaft, underwater tunnel

Project data

Building Method
conventional tunnelling
Burst volume
420.000 m³
Order sum
68.4 million EUR (as part of a consortium)
Period of implementation
January 2006 - January 2011
Diameter / Cross-section
750 - 900 m²

Sekretariat Untertagebau
+43 5556 7181-817

For National Hydro Power Corp. (NHPC), a consortium under the technical direction of JÄGER carried out the excavation and concreting works for a 520 MW cavern power plant with a total excavation volume of 750,000 m³. The core of this construction project was the machine cavern at a remarkable 122 m in length, 22 m in width and 42 m in height. In addition to the 100-m-long transformer cavern and the over 50-metre-high underwater surge tank, further challenges were presented by 2 pressure shafts with a diameter of 4.50 m, 294 m deep, a surge tank with a diameter of 13 m, 147 m high, and a 1,976 m pressure tunnel plus an underwater tunnel of 2,696 m in length. At peak times, over 1000 employees from India and 12 Europeans were at work.

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