PLTA Sigura-gura Inalum
The Sigura-gura Hydroelectric Power Plant (PLTA Sigura-gura) is the first and second largest underground hydroelectric power plant in Indonesia. Located in Paritohan Village, Toba Regency, North Sumatra, this plant is managed by PT Indonesia Asahan Aluminum (INALUM) and supplies electricity to the aluminum smelter in Kuala Tanjung. Info: 081375564611 Herman TV, Wak Herman, Herman Travel.

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