Tangga is a 318MW hydro power project. It is located on Asahan river/basin in North Sumatra, Indonesia. 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. Post completion of construction, the project got commissioned in 1982. Buy the profile here.


The project is developed and owned by PT Indonesia Asahan Aluminium.

Development status

The project got commissioned in 1982.

Contractors involved

Mitsubishi Heavy Industries was selected as the turbine supplier for the hydro power project. The hydro power project consists of 4 turbines.

Mitsubishi Electric supplied electric generator(s) for the project.

For more details on Tangga, buy the profile here.

About PT Indonesia Asahan Aluminium

PT Indonesia Asahan Aluminium (INALUM), is an aluminium products manufacturer and distributor. The company offers products such as aluminium billet, aluminium ingot, and aluminium alloy products. It provides services such as metal trading, metal smelting, metal transportation, and technical support services, among others. INALUM constructs and develops aluminium smelting plants, mosques, power plants, sport hall, hospital, churches, sport facilities, supermarket, post office, and telecommunication facilities, among others. The company also operates Siguragura Intake Dam, Regulating Dam, and Tangga Intake Dam. It has its operations in Asahan, Jakarta, Paritohan, and Medan, Indonesia. INALUM is headquartered in South Jakarta, Indonesia.


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.