Footbridge over the Kotmale Oya
|Native name||කොත්මලේ ඔය (Sinhala)|
|Source||Horton Plains National Park|
|⁃ location||Central Province, Sri Lanka|
|Length||70 km (43 mi)|
The Kotmale River : කොත්මලේ ඔය) is the longest tributary of Mahaweli River. The river begins as the Agra Oya, in the Horton Plains. The Central Plains have an annual rainfall of between 125 and 200 inches a year. The river is approximately 70 km (43 mi) long and drains a basin of about 58,534 ha (226 square miles). The river flows through a traditional area of ancient villages and tea plantations. King Dutugemunu spent his youth here. The Kotmale Oya flows into the Mahaweli shortly at Pallegama. Tributaries of the Kotmale Oya include the Nanu Oya, the Pundalu Oya, the Puna Oya, and the Dambagastalawa Oya.(Sinhala
The river was dammed between 1979 and 1985 as part of a hydro-electric project within the Accelerated Mahaweli Ganga scheme. The opening ceremony took place in August 1985. Some 3,000 families had to be relocated top higher ground. The area has a history of geological instability.
The Snake River is a major river of the greater Pacific Northwest region in the United States. At 1,078 miles (1,735 km) long, it is the largest tributary of the Columbia River, in turn the largest North American river that empties into the Pacific Ocean. The Snake River rises in western Wyoming, then flows through the Snake River Plain of southern Idaho, the rugged Hells Canyon on the Oregon–Idaho border and the rolling Palouse Hills of Washington, emptying into the Columbia River at the Tri-Cities, Washington.
The Mahaweli River, is a 335 km (208 mi) long river, ranking as the longest river in Sri Lanka. It has a drainage basin of 10,448 km2 (4,034 sq mi), the largest in the country, which covers almost one-fifth of the total area of the island. The real creation of Mahaweli ganga starts at Polwathura(at 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. The bay includes the first of a number submarine canyons, making Trincomalee one of the finest deep-sea harbors in the world.
Pussellawa Sinhala: පුස්සැල්ලාව. Tamil: புசல்லாவை, is a small town in Kandy District, Sri Lanka. It is located along the A5 road between Gampola and Nuwara Eliya.
St. Clair's Falls is one of the widest waterfalls in Sri Lanka and is commonly known as the "Little Niagara of Sri Lanka". It is one of six waterfalls affected by the Upper Kotmale Hydropower Project.
Salmon Falls Creek is a tributary of the Snake River, flowing from northern Nevada into Idaho in the United States. Formed in high mountains at the northern edge of the Great Basin, Salmon Falls Creek flows northwards 121 miles (195 km), draining an arid and mountainous basin of 2,103 square miles (5,450 km2). The Salmon Falls Creek valley served as a trade route between the Native American groups of the Snake River Plain and Great Basin. Today, most of its water is used for irrigation.
The Upper Kotmale Dam is located in Talawakele, within the Nuwara Eliya District, in the Central Province of Sri Lanka. The dam feeds the third largest hydroelectric power station in the country.
Somawathiya National Park is one of the four national parks designated under the Mahaweli River development project. Somawathiya Chaitya, a stupa said to be containing a relic of the tooth of the Buddha, is situated within the park. The park was created on 2 September 1986, having been originally designated a wildlife sanctuary on 9 August 1966. The park is home to many megaherbivores. The national park is located 266 kilometres (165 mi) north-east of Colombo.
Maduru Oya National Park is a national park of Sri Lanka, established under the Mahaweli development project and also acts as a catchment of the Maduru Oya Reservoir. The park was designated on 9 November 1983. Providing a sanctuary to wildlife, especially for elephants and protecting the immediate catchments of five reservoirs are the importance of the park. A community of Vedda people, the indigenous ethnic group of Sri Lanka lives within the park boundary in Henanigala. The park is situated 288 kilometres (179 mi) north-east of Colombo.
Kotmale is a village in Sri Lanka in Central Province. Kotmale forms part of a mountainous region that the Sinhalese kings left forested to generate sufficient rainfall for rice cultivation in the valleys below.
Pallegama is a village in Sri Lanka. It is located within Central Province. The Kotmale Oya drains into the Mahaweli River at this location.
The Rambakan Oya Dam is an embankment dam in Maha Oya, Eastern Province, Sri Lanka. The reservoir was designed and constructed by the Sri Lanka Mahaveli Authority and currently functions under the direction of the Ministry of Irrigation and Water Resources Management. It have been created by building an Earthen dam of which is about 1225m in length across the river of Mundeni Aru.
Nanu Oya is a 27 km (17 mi) long stream in the Central Province of Sri Lanka It originates from Pidurutalagala at an elevation of over 2,000 m (6,562 ft) and drains into the Kotmale Oya at an elevation of approximately 1,200 m (3,937 ft). The Kotmale Oya is a tributary of the Mahaweli River, the longest river in Sri Lanka, which finally discharges at Trincomalee after a combined distance of nearly 350 km (217 mi). The river was dammed in 1873 to create the popular Lake Gregory in Nuwara Eliya. The Nanu Oya discharges into the Kotmale Oya 2.5 km (1.6 mi) upstream of the Upper Kotmale Dam.
Dunsinane Falls is a waterfall in Nuwara Eliya District of Sri Lanka. It is situated in Pundaluoya village and between the Tea estates known as Dunsinan and Shin. Therefore sometimes this falls is called as Dunsinance Shine falls. The water fall is created by the river called Pundalu Oya which is a tributary of Kotmale Oya.
Kadadora Vihara was a Buddhist temple, situated in Kadadora, Nuwara Eliya District, Sri Lanka. The temple was abandoned and ruined as the construction of Kotmale Dam in 1979 by Mahaweli Development programme. The ruins of Vihara still can be seen when the water level of Kotmale Reservoir is low, but the sight is very rare.
The Mahaweli Development programme is known as the largest multipurpose national development programme in the history of Sri Lanka and is also considered as the keystone of the government's development programme that was initiated in 1961.
The Maduru Oya Dam is an irrigation dam built across the Maduru Oya. The embankment dam measures 1,090 m (3,580 ft) in length, 41 m (135 ft) in height, and creates the Maduru Oya Reservoir. The reservoir has a catchment area of 453 km2 (175 sq mi) and a storage capacity of 596,000,000 cubic metres (2.10×1010 cu ft) The proposed Maduru Oya Solar Power Station is to be built over the surface of the Maduru Oya reservoir.
The Moragolla Dam is a planned hydroelectric dam in Moragolla, Sri Lanka. The dam is to be 35 m (115 ft) high and is planned to create the 1,980,000 m3 (70,000,000 cu ft) Moragolla Reservoir with a maximum supply level at 548 m (1,798 ft) MSL. Upon completion, the Moragolla Power Station would have a gross installed capacity of 30 megawatts from two francis turbines, capable of generating approximately 85 GWh annually.
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