Santiago Antunez de Mayolo is a 798MW hydro power project. It is located on Mantaro river/basin in Huancavelica, Peru. According to GlobalData, who tracks and profiles over 170,000 power plants worldwide, the project is currently active. It has been developed in a single phase. The project construction commenced in 1967 and subsequently entered into commercial operation in 1973. Buy the profile here.


The project was developed by Webuild and is currently owned by Empresa Electricidad del Peru with a stake of 100%.

Santiago Antunez de Mayolo is a reservoir based project. Santiago Antunez de Mayolo underwent through rehabilitation & modernization during 1979, 2015-2017. The project generated 5,356.55 GWh of electricity.

Development status

The project construction commenced in 1967 and subsequently entered into commercial operation in 1973.

Contractors involved

Ansaldo Energia was selected as the turbine supplier for the hydro power project. The company provided 7 units of pelton turbines, each with 114MW nameplate capacity.

The electric generators for the project were procured from Ansaldo Energia and Ercole Marelli Power.

For more details on Santiago Antunez de Mayolo, buy the profile here.

About Webuild

Webuild SpA (Webuild), is a heavy construction contractor. It specializes in executing large and complex projects. The company offers design, engineering and construction services for dams, hydroelectric plants, canals, railways, metros, bridges, roads, motorways, civil and industrial buildings and airports. It also executes underground works, and civil engineering works for waste-to-energy plants and environmental protection projects. The company also carries out concession activities related to motorways, metros and car parks. Webuild primarily serves water, renewable energy, transport and urban infrastructure sectors. It has operations in several countries across Europe, North America, Latin America, the Middle East, Africa, Asia and Oceania. Webuild is headquartered in Milan, Italy.

This content was updated on 20 July 2023

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GlobalData, the leading provider of industry intelligence, provided the underlying research used to produce this article.

This information is drawn from GlobalData’s Power Intelligence Center, which provides detailed profiles of over 170,000 active, planned and under construction power plants worldwide from announcement through to operation across all technologies and countries worldwide.