Completed the installation of the penstock at Alto Maipo HPP

Friday, 18 June 2021

ATB Riva Calzoni completed the installation of the vertical shaft penstock at Alto Maipo Hydropower Project (Chile), 531 MW.

Installation completed in Alto Maipo

The 2.4m penstock is installed in a 551 m deep shaft, named Alfalfal II, one of the deepest shafts in hydropower projects all over the world.

The penstock is manufactured with high tensile strength steel (S 690 QL), has a design head of 1,280 m and a maximum wall thickness of 57mm.

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