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The Mahaweli Ganga starts at Polwathura (in the Mahawila area), a remote village of Nuwara-Eliya District in bank Nawalapitiya of Kandy District by further joining of Hatton Oya and Kotmale Oya. The river reaches the Bay of Bengal on the southwestern side of Trincomalee Bay.
There are two words meaning "river" in the Sinhala language, namely Ganga (ගඟ) and Oya (ඔය), of which the usage of both terms is arbitrary. At 335 km (208 mi), the Mahaweli River is the longest river on the island, its drainage basin covering more than one-fifth of the island. It is estimated that there are 103 rivers in Sri Lanka.
The main purposes of carrying out the program were the generation of hydroelectric power, controlling flood, making irrigation facilities for dry zone cultivation, settlement of landless and unemployed families by constructing and developing the physical and social infrastructure required for human habitation by using the waters of the Mahaweli River.
Mahaweli Authority is a state-owned operator in Sri Lanka for managing the Mahaweli River and its projects. It was established in 1979. [2]The primary objective of the Mahaweli Authority is to implement the Mahaweli River development scheme.
The Kalu Ganga Dam is a large gravity dam, and the second vital component of the larger and more complex Moragahakanda — Kalu Ganga Project across the Kalu Ganga at Pallegama, in the Matale District of Sri Lanka. The Kalu Ganga is a tributary of the Amban Ganga which in turn is a tributary of the Mahaweli River, the
Victoria Dam (Sinhala: වික්ටෝරියා වේල්ල Viktoriya Vella) is an arch dam located 130 mi (209 km) upstream of the Mahaweli River's mouth and 4 mi (6 km) from Teldeniya in Sri Lanka. It is named in honour of Queen Victoria of the United Kingdom. Its main purposes are irrigation and hydroelectric power production.
Moragolla is the last major Hydro Power Plant in Mahaweli Ganga Hydro Power Scheme. The project site is located on the upper reaches of the Mahaweli Ganga in the Central Highlands, approximately 22 km south of Kandy City, close to the village of Ulapane in Kandy district and about 130 km north-east of Colombo.
The Polgolla Barrage (also erroneously known as the Polgolla Dam) is a barrage built across the Mahaweli River at Polgolla, in the Central Province of Sri Lanka.The main purpose of the barrage is to maintain the water level of Mahaweli river at a constant height to provide a uniform potential head at the intake to the underground tunnel which conveys water to Ukuwela powerplant.