List of dams and reservoirs in Sri Lanka - wikipedia List of dams and reservoirs in Sri Lanka Hydroelectricity accounts for nearly half of the installed power capacity of Sri Lanka. The following page lists most dams in Sri Lanka. Most of these dams are governed by the Mahaweli Authority, while the Ceylon Electricity Board operates dams used for hydroelectric power generation. Hydroelectric dams, including small hydros accounts for nearly half of the installed power capacity of Sri Lanka. Sri Lanka is pockmarked with a large number of irrigation dams with its water resource distributed across nearly the entirety of the island for agricultural purposes via artificial canals and streams. Utilization of hydro resources for agricultural production dates back pre-Colonial era, with current crop productions now largely dependand on these water resources. Dams in Sri Lanka The Victoria Dam on 15 April 2011. Three days after its 26th anniversary of opening. Randenigala Dam in 2013. Upstream view of the Kotmale Dam. Open spillways of the Rajanganaya Dam. Irrigation dams with a length and height of more than 100 m ( 330 ft ) and 10 m ( 33 ft ) are listed, including all the state - run hydroelectric power stations. Privately owned `` small - hydro '' facilities ( which are limited to a maximum nameplate capacity of 10 MW ), are not included in this list. Nearly all hydroelectric dams are also used for providing water resource for irrigation purposes, hence for the sake of identifying the hydroelectric dams, any dam with hydroelectric involvement is stated as such in the below table, even if the primary purpose of building the dam is to retain water for irrigation. Dam Location Purpose Length ( m ) Height ( m ) Gen. Type Ref Bowatenna 07 ° 40 ′ 00 '' N 80 ° 40 ′ 00 '' E ﻿ / ﻿ 7.66667 ° N 80.66667 ° E ﻿ / 7.66667 ; 80.66667 ﻿ ( Bowatenna Dam ) Hydroelectricity 226 30 40 Gravity Broadlands 06 ° 58 ′ 50 '' N 80 ° 27 ′ 09 '' E ﻿ / ﻿ 6.98056 ° N 80.45250 ° E ﻿ / 6.98056 ; 80.45250 ﻿ ( Broadlands Hydropower Project ) Hydroelectricity 114 24 35 Gravity Canyon 06 ° 52 ′ 18 '' N 80 ° 31 ′ 34 '' E ﻿ / ﻿ 6.87167 ° N 80.52611 ° E ﻿ / 6.87167 ; 80.52611 ﻿ ( Canyon Dam ) Hydroelectricity 100 Arch - gravity Castlereigh 06 ° 52 ′ 24 '' N 80 ° 33 ′ 59 '' E ﻿ / ﻿ 6.87333 ° N 80.56639 ° E ﻿ / 6.87333 ; 80.56639 ﻿ ( Castlereigh Dam ) Hydroelectricity 50 Gravity Deduru Oya 07 ° 43 ′ 06 '' N 80 ° 16 ′ 28 '' E ﻿ / ﻿ 7.71833 ° N 80.27444 ° E ﻿ / 7.71833 ; 80.27444 ﻿ ( Deduru Oya Dam ) Hydroelectricity 2,400 20 1.5 Embankment Dyraaba 06 ° 53 ′ 13 '' N 80 ° 57 ′ 23 '' E ﻿ / ﻿ 6.88694 ° N 80.95639 ° E ﻿ / 6.88694 ; 80.95639 ﻿ ( Dyraaba Dam ) Hydroelectricity 165 50 120 Gravity Gal Oya 07 ° 12 ′ 37 '' N 81 ° 32 ′ 10 '' E ﻿ / ﻿ 7.21028 ° N 81.53611 ° E ﻿ / 7.21028 ; 81.53611 ﻿ ( Gal Oya Dam ) Hydroelectricity 1,100 43 12 Embankment Inginimitiya 07 ° 56 ′ 40 '' N 80 ° 07 ′ 54 '' E ﻿ / ﻿ 7.94444 ° N 80.13167 ° E ﻿ / 7.94444 ; 80.13167 ﻿ ( Inginimitiya Dam ) Irrigation 4,880 18 N / A Embankment Kalu Ganga 07 ° 33 ′ 35 '' N 80 ° 50 ′ 09 '' E ﻿ / ﻿ 7.55972 ° N 80.83583 ° E ﻿ / 7.55972 ; 80.83583 ﻿ ( Kalu Ganga Dam ) Irrigation 546 67 N / A Gravity Kandalama 07 ° 53 ′ 00 '' N 80 ° 41 ′ 40 '' E ﻿ / ﻿ 7.88333 ° N 80.69444 ° E ﻿ / 7.88333 ; 80.69444 ﻿ ( Kandalama Dam ) Irrigation 1,600 21 N / A Embankment Kantale 08 ° 21 ′ 40 '' N 80 ° 59 ′ 29 '' E ﻿ / ﻿ 8.36111 ° N 80.99139 ° E ﻿ / 8.36111 ; 80.99139 ﻿ ( Kantale Dam ) Irrigation 4,200 15 N / A Embankment Kotmale 07 ° 03 ′ 39 '' N 80 ° 35 ′ 50 '' E ﻿ / ﻿ 7.06083 ° N 80.59722 ° E ﻿ / 7.06083 ; 80.59722 ﻿ ( Kotmale Dam ) Hydroelectricity 600 87 201 Gravity Kukule Ganga 06 ° 34 ′ 48 '' N 80 ° 19 ′ 37 '' E ﻿ / ﻿ 6.58000 ° N 80.32694 ° E ﻿ / 6.58000 ; 80.32694 ﻿ ( Kukule Ganga Dam ) Hydroelectricity 110 20 80 Gravity Laxapana 06 ° 55 ′ 08 '' N 80 ° 29 ′ 22 '' E ﻿ / ﻿ 6.91889 ° N 80.48944 ° E ﻿ / 6.91889 ; 80.48944 ﻿ ( Laxapana Dam ) Hydroelectricity 75 Gravity Lunugamwehera 06 ° 21 ′ 11 '' N 81 ° 12 ′ 09 '' E ﻿ / ﻿ 6.35306 ° N 81.20250 ° E ﻿ / 6.35306 ; 81.20250 ﻿ ( Lunugamwehera Dam ) Irrigation N / A Embankment Maduru Oya 07 ° 38 ′ 53 '' N 81 ° 12 ′ 50 '' E ﻿ / ﻿ 7.64806 ° N 81.21389 ° E ﻿ / 7.64806 ; 81.21389 ﻿ ( Maduru Oya Dam ) Irrigation 1,090 41 N / A Embankment Maskeliya 06 ° 50 ′ 37 '' N 80 ° 32 ′ 56 '' E ﻿ / ﻿ 6.84361 ° N 80.54889 ° E ﻿ / 6.84361 ; 80.54889 ﻿ ( Maskeliya Dam ) Hydroelectricity 60 Gravity Moragahakanda 07 ° 42 ′ 17 '' N 80 ° 46 ′ 59 '' E ﻿ / ﻿ 7.70472 ° N 80.78306 ° E ﻿ / 7.70472 ; 80.78306 ﻿ ( Moragahakanda Dam ) Hydroelectricity 65 25 Gravity Moragolla Hydroelectricity 35 30 Gravity Norton 06 ° 54 ′ 50 '' N 80 ° 31 ′ 18 '' E ﻿ / ﻿ 6.91389 ° N 80.52167 ° E ﻿ / 6.91389 ; 80.52167 ﻿ ( Norton Dam ) Hydroelectricity 50 Gravity Nilambe 07 ° 11 ′ 18 '' N 80 ° 37 ′ 52 '' E ﻿ / ﻿ 7.18833 ° N 80.63111 ° E ﻿ / 7.18833 ; 80.63111 ﻿ ( Nilambe Dam ) Hydroelectricity 70 3.2 Gravity Polgolla 07 ° 19 ′ 18 '' N 80 ° 38 ′ 42 '' E ﻿ / ﻿ 7.32167 ° N 80.64500 ° E ﻿ / 7.32167 ; 80.64500 ﻿ ( Polgolla Barrage ) Hydroelectricity 144 14.6 40 Gravity Puhulpola 06 ° 54 ′ 51 '' N 80 ° 56 ′ 00 '' E ﻿ / ﻿ 6.91417 ° N 80.93333 ° E ﻿ / 6.91417 ; 80.93333 ﻿ ( Puhulpola Dam ) Irrigation 175 45 NA Gravity Rajanganaya 08 ° 08 ′ 30 '' N 80 ° 13 ′ 23 '' E ﻿ / ﻿ 8.14167 ° N 80.22306 ° E ﻿ / 8.14167 ; 80.22306 ﻿ ( Rajanganaya Dam ) Irrigation N / A Embankment Randenigala 07 ° 12 ′ 00 '' N 80 ° 55 ′ 30 '' E ﻿ / ﻿ 7.20000 ° N 80.92500 ° E ﻿ / 7.20000 ; 80.92500 ﻿ ( Randenigala Dam ) Hydroelectricity 485 94 126 Embankment Rambakan Oya 07 ° 33 ′ 53 '' N 81 ° 27 ′ 17 '' E ﻿ / ﻿ 7.56472 ° N 81.45472 ° E ﻿ / 7.56472 ; 81.45472 ﻿ ( Rambakan Oya Dam ) Irrigation 1225 24.7 N / A Embankment Rantembe 07 ° 12 ′ 00 '' N 80 ° 57 ′ 00 '' E ﻿ / ﻿ 7.20000 ° N 80.95000 ° E ﻿ / 7.20000 ; 80.95000 ﻿ ( Rantembe Dam ) Hydroelectricity 420 42 52 Gravity Ratkinda 07 ° 30 ′ 30 '' N 81 ° 03 ′ 24 '' E ﻿ / ﻿ 7.50833 ° N 81.05667 ° E ﻿ / 7.50833 ; 81.05667 ﻿ ( Ratkinda Dam ) Irrigation 4,960 25 N / A Embankment Samanala 06 ° 40 ′ 54 '' N 80 ° 47 ′ 54 '' E ﻿ / ﻿ 6.68167 ° N 80.79833 ° E ﻿ / 6.68167 ; 80.79833 ﻿ ( Samanala Dam ) Hydroelectricity 530 110 124 Embankment Udawalawe 06 ° 26 ′ 02 '' N 80 ° 51 ′ 15 '' E ﻿ / ﻿ 6.43389 ° N 80.85417 ° E ﻿ / 6.43389 ; 80.85417 ﻿ ( Udawalawe Dam ) Hydroelectricity 3,900 6 Embankment Ulhitiya 07 ° 28 ′ 20 '' N 81 ° 03 ′ 17 '' E ﻿ / ﻿ 7.47222 ° N 81.05472 ° E ﻿ / 7.47222 ; 81.05472 ﻿ ( Ulhitiya Dam ) Irrigation N / A Embankment Upper Kotmale 06 ° 56 ′ 48 '' N 80 ° 39 ′ 29 '' E ﻿ / ﻿ 6.94667 ° N 80.65806 ° E ﻿ / 6.94667 ; 80.65806 ﻿ ( Upper Kotmale Dam ) Hydroelectricity 180 35 150 Gravity Victoria 07 ° 14 ′ 29 '' N 80 ° 47 ′ 05 '' E ﻿ / ﻿ 7.24139 ° N 80.78472 ° E ﻿ / 7.24139 ; 80.78472 ﻿ ( Victoria Dam ) Hydroelectricity 520 122 210 Arch See also Map all coordinates using OSM Map all coordinates using Google Export all coordinates as KML Export all coordinates as GPX Map all microformatted coordinates Place data as RDF Electricity sector in Sri Lanka List of power stations in Sri Lanka List of rivers of Sri Lanka References Jump up ^ `` About the Broadlands Hydropower Project ''. BHPCEB.lk. Retrieved 2 October 2013. Jump up ^ P. Krishnaswamy ( 12 January 2014 ). `` Deduru Oya Reservoir Project commissioning, a landmark event ''. Sunday Observer. Retrieved 4 November 2015. ^ Jump up to : Sriyananda, Shanika ( 27 March 2015 ). `` Uma Oya Project : More damages than benefits ? ''. Daily FT. Retrieved 1 July 2017. Jump up ^ Principal project features of the Moragahakanda Dam and appurtenant structures, retrieved 2010 - 09 - 22 Jump up ^ Moragahakanda & Kaluganga Development Project, retrieved 2010 - 09 - 22 Jump up ^ Saudi gives Rs. 5,332 M for Kaluganga Project, retrieved 2010 - 09 - 22 Jump up ^ `` Moragolla Hydropower ''. Ministry of Power and Renewable Energy. Retrieved 2 July 2017. Jump up ^ Ratkinda / Ulhitiya Dam Jump up ^ Upper Kotmale Dam, retrieved 2010 - 08 - 08 Jump up ^ Upper Kotmale power project to be completed soon, retrieved 2010 - 08 - 08 Jump up ^ Victoria Dam, retrieved 2010 - 08 - 08 External links Mahaweli Authority of Sri Lanka Electricity in Sri Lanka Sustainable power stations Hydro power Laxapana Complex Broadlands Canyon Castlereigh Laxapana Maskeliya Norton Mahaweli Complex Bowatenna Deduru Oya Kotmale Moragahakanda Nilambe Polgolla Randenigala Rantembe Upper Kotmale Victoria Samanala Complex Gal Oya Kukule Ganga Samanala Udawalawe Solar power Hambantota Wind power Ambewela Aitken Spence Hambantota Madurankuliya Mampuri - I Mampuri - II Mampuri - III Mannar Island Nala Danavi Nirmalapura Pawan Danavi Pollupalai Seguwantivu Uppudaluwa Vallimunai Vidatamunai Willwind Fossil - fuel power stations Operational / UC Aitken Spence Asia Power Sapugaskanda Colombo Port Kelanitissa Lakdhanavi Lakvijaya Northern Sampur Sapugaskanda Uthuru Janani Yugadanavi Decommissioned Ace Horana Ace Matara Aggreko Chunnakam Embilipitiya Heladhanavi Koolair Organizations Ceylon Electricity Board Ministry of Power and Energy Public Utilities Commission of Sri Lanka Sustainable Energy Authority India -- Sri Lanka HVDC Interconnection List of dams and reservoirs in Sri Lanka List of power stations in Sri Lanka Inland waters of Sri Lanka Dams and reservoirs With hydroelectric capabilities Bowatenna Broadlands Canyon Castlereigh Deduru Oya Dyraaba Gal Oya Kotmale Kukule Ganga Laxapana Maskeliya Moragahakanda Moragolla Nilambe Norton Polgolla Randenigala Rantembe Samanala Udawalawe Upper Kotmale Victoria Irrigation - only ( incl. ancient tanks ) Beira Lake Diyawanna Giant 's Tank Giritale Tank Inginimitiya Iranamadu Tank Kala Wewa Kalu Ganga Kandalama Kandy Lake Kantale Lake Gregory Lunugamwehera Maduru Oya Minneriya Tank Muthuiyankaddu Kulam Puhulpola Rajanganaya Rambakan Oya Ratkinda Tissa Wewa ( Anuradhapura ) Tissa Wewa ( Tissamaharama ) Ulhitiya Vavuni Kulam Lagoons East coast Batticaloa Lagoon Chalai Lagoon Chundikkulam Lagoon Kokkilai Lagoon Kokkilai Lagoon Nai Aru Lagoon Nanthi Lagoon Ullackalie Lagoon Upaar Lagoon Vadamarachchi Lagoon Valaichchenai Lagoon West coast Jaffna Lagoon Mundal Lagoon Negombo Lagoon Puttalam Lagoon Uppu Aru Lagoon Southern coast Koggala Lagoon Rekawa Lagoon Malala - Ambilikala Lagoons Rathgama Lake Rivers ≥ 100 km Deduru Oya Gal Oya Gin Ganga Kala Oya Kalu Ganga ( Kukule Ganga ) Kelani River ( Kehelgamu Oya Maskeliya Oya Pusweli Oya ) Kirindi Oya Kumbukkan Oya Maduru Oya Maha Oya Mahaweli River ( Amban Ganga Kotmale Oya Nanu Oya ) Malvathu River Menik Ganga Mi Oya Walawe River ( Belihul Oya ) Yan Oya < 100km Akkarayan Aru Kanakarayan Aru Kodalikkallu Aru Madu Ganga Mandekal Aru Mavil Aru Nay Aru ( Mannar ) Nay Aru ( Mullaitivu ) Netheli Aru Pali Aru Pallavarayankaddu Aru Parangi Aru Per Aru Piramenthal Aru Theravil Aru Valukkai Aru Verugal Aru Yodha Ela Related organizations Mahaweli Authority Ministry of Irrigation and Water Resources Management List of dams and reservoirs in Sri Lanka List of rivers of Sri Lanka Retrieved from `` https://en.wikipedia.org/w/index.php?title=List_of_dams_and_reservoirs_in_Sri_Lanka&oldid=788606118 '' Categories : Hydroelectric power stations in Sri Lanka Dams in Sri Lanka Reservoirs in Sri Lanka Lists of dams and reservoirs by country Hidden categories : Lists of coordinates Geographic coordinate lists Articles with Geo Talk About Wikipedia සිංහල Edit links This page was last edited on 2 July 2017, at 11 : 14. 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Question: what is the largest dam in sri lanka
Answer: Ratkinda