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Alto Maipo hydroelectric project

Project Stages

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Early Works
Environmental evaluation
Start: 05/2008
Completion: 03/2009
In Construction
Current Stage Under Construction
Start: 12/2013
Completion: 12/2020
In operation
Project Details


The project entails the construction and operation of two run-of-the-river underground plants that will supply Chile's central SIC power grid. The Alfalfal II and Las Lajas plants will be situated along the same hydrographic system. The project will require a workforce of 2,050 workers.

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Principal Works

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  • * Figures and dates are as per the latest publicly available information, as well as information gathered by BNamericas reporters and analysts and are subject to change.

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Key Specs

Full Name
Alto Maipo hydroelectric project
Project Type
Development Phase
Under Construction
Project Status
Project Capacity
517  MW (megawatt)  Hydro
US$ 2.05bn
Completion Date

Maipo river's upper basin in San José de Maipo, about 150km from Santiago in the Cordillera province. The plants will be located in the Colorado river sub-basin.

* The map coordinates represent the approximate latitude and longitude, and not the exact location of the project.

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Owner / operator
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Project Director
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Logistics Manager
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General Manager
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