The Kotmale Dam is a large hydroelectric and irrigation dam in Kotmale, Sri Lanka. The dam generates power from three 67 MW turbines, totalling the installed capacity to 201 MW, making it the second largest hydroelectric power station in Sri Lanka. Construction on the dam began in August 1979 and was ceremonially completed in February 1985.[1] The dam forms the Kotmale Reservoir, which was renamed to Gamini Dissanayake Reservoir on 11 April 2003 following a request by Prime Minister Ranil Wickramasinghe.[2][3]

Kotmale Dam
UG-LK Photowalk - 2018-03-24 - Kotmale Dam (4).jpg
Right bank of the dam, with spillways
Kotmale Dam is located in Sri Lanka
Kotmale Dam
Location of Kotmale Dam in Sri Lanka
CountrySri Lanka
Coordinates07°03′39″N 80°35′50″E / 7.06083°N 80.59722°E / 7.06083; 80.59722Coordinates: 07°03′39″N 80°35′50″E / 7.06083°N 80.59722°E / 7.06083; 80.59722
Construction beganFebruary 1979 (1979-02)
Opening dateAugust 1985 (1985-08)
Owner(s)Mahaweli Authority
Dam and spillways
Type of damEmbankment dam
ImpoundsKotmale Oya
Height (foundation)87 m (285 ft)
Length600 m (1,969 ft)
CreatesGamini Dissanayake Reservoir
Kotmale Power Station
Coordinates07°07′41″N 80°34′42″E / 7.12806°N 80.57833°E / 7.12806; 80.57833
Operator(s)Ceylon Electricity Board
Turbines3 × 67 MW
Installed capacity201 MW

See alsoEdit


  1. ^ "Kotmale Dam". Archived from the original on 8 May 2011. Retrieved 21 April 2011.
  2. ^ Thenabadu, Sunil (18 October 2009). "A visionary politician who played the game as it should be played". The Sunday Times. Retrieved 25 August 2018.
  3. ^ Thenabadu, Sunil (22 October 2015). "Superlative revelation of a supreme politician". Daily News. Retrieved 25 August 2018.