Penstocks for Alto Maipo hydroelectric project 531 MW

ATB Riva Calzoni has been chosen by Strabag for the manufacture of penstocks.

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Project: Alto Maipo hydroelectric project
Developer company: ATB Riva Calzoni Colombia
Place: Alto Maipo (Chile)
Category: Hydropower Project
Customer: Strabag Spa
End User: Aes Gener
Year: 2017-2018

Cajon del Maipo: in this area, Aes Gener, Chile's production and distribution company, has planned the construction of two hydroelectric plants, which will produce a total of 531 MW, including three vertical shafts: the two 160 m high of Las Lajas (using penstocks made of S690 QL high yield structural steel with a diameter of 3700 mm) and the 600 m high of Alfalfal, (450 m penstock made also of S 690 QL diameter 2400 mm with a thickness up to 57 mm), one of the longest shafts in the hydroelectric industry.

The project is located on the Maipo River, 50 kilometers from Santiago de Chile, the load center of Chile´s power grid, and once completed, will be able to meet much of Chile's energy demand. The intervention required the experience and skills of ATB Riva Calzoni, chosen by Strabag, Austrian general contractor, for the manufacture of penstocks made of S690 QL, a high-strength steel subject to high probability of cold cracking.

To simplify the activities on the territory ATB Riva Calzoni has established the subsidiary, ATB Chile, in charge of monitoring the work and management of the logistics aspects of the contract.