Uma Oya Hydropower Complex

The Uma Oya Hydropower Complex (also internally called Uma Oya Multipurpose Development Project or UOMDP) is an irrigation and hydroelectric complex in the Badulla District of Sri Lanka. Early assessments of the project date back to 1989, when the first studies was conducted by the country's Central Engineering and Consultancy Bureau. The complex involves building a dam across Dalgolla Oya, and channelling water over a 3,975 m (13, 041 ft) tunnel to Mathatilla Oya, both of which are tributaries of the Uma Oya. At Mathatilla Oya, another dam is constructed to channel 145,000,000 m3 (5.1×109 ft3) of water per annum, via a 15,290 m (50, 160 ft) headrace tunnel to the Uma Oya Power Station, where water then discharged to the Alikota Aru via a 3,335 m (10, 942 ft) tailrace tunnel. The construction of the complex was inaugurated in April 2008 by former President Mahinda Rajapaksa and Iranian President Mahmoud Ahmadinejad. The total project cost is estimated to be approximately US$529 million (approximately Rs. 80 billion), 85% of which is provided by the Government of Iran. The project was officially inaugurated by the President of Iran Dr. Ebrahim Raisi and President of Sri Lanka Ranil Wickremasinghe on 24 April 2024.

Power station data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).