Hydro power plants in Sri Lanka

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Hydro power plants in Sri Lanka

                      *Victoria

The Victoria Reservoir was built across the Mahaweli River and the Victoria Dam was built for the Victoria Reservoir. The dam and tunnel were built by Balfor Beatty and Edmund Natal, a British joint venture. The dam is 122 meters high, 520 meters long, 6 meters wide and 25 meters wide. It was inaugurated in 1985 by then President J.R. Jayewardene.

The Victoria Reservoir was created by the dam, which covers an area of ​​22.7 square kilometers, has a water capacity of 722,000,000 cubic meters and a catchment area of ​​1869 square kilometers. The water from the reservoir is carried to the power plant by a 5646 meter long tunnel. It has three port doors with a diameter of 6.2 m each, which create a net water pressure of 190 m and discharge water to three turbines. These turbines can generate up to 780 gigawatt hours of electricity annually. It contributes about 210 megawatts.

                             *Kotmale



Located in the Kotmale area. The Kotmale Reservoir has been created by crossing the Kotmale River. Kotmale Dam is the second largest water and irrigation dam in the Kotmale area. It is the second largest hydroelectric dam in Sri Lanka. Construction began in February 1979 and opened in August 1985. It is a gravity type dam with a height of 87 meters and a length of 600 meters. The power plant is owned by the Sri Lanka Electricity Board and has three 67 MW water wheels. Installed capacity is up to 201 MW.

                        *Randenigala



The dam creates the Randenigala reservoir. This is located in the Central Province of Sri Lanka. It has a catchment area of ​​2,330 km2 and a total storage capacity of 861,000,000 m3. The annual rainfall of the reservoir is approximately 1,250–3,000 mm. The reservoir also receives water from the Victoria Reservoir and the Mahaweli River. It is 94 m high, 485 m long, 10 m high and 303 m wide at the base and base, respectively. The dam is mostly made of rock and the core is said to be made of clay. Its length is 270 m and joint width is 48 m. Water is supplied to the power plant by a single steel tunnel 886 feet and 20.3 feet in length and diameter. With a combined capacity of 126 MW, the power plant produces 428 gigawatt hours annually.

             Butterfly Hydro Power Plant


Construction began in 1986 and opened in 1992. It was built with financial assistance from Japan and the United Kingdom. This rocky dam is 110m high and 530m long. Designed to cross the Walawe River. The capacity of the sluice gates is 3,600 m3 / s. The reservoir has 218,000,000 m3 and a water holding capacity of 372 km2. Speaking of the power plant, it is powered by two 62 MW water wheels. The installed capacity is 124 MW. The annual generation is 405 gigawatt hours.

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