List of dams and reservoirs in 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, account for nearly half of the installed power capacity of Sri Lanka.

Sri Lanka is pockmarked with many 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 to the pre-Colonial era, with the current crop production now largely dependent on these water resources. __NOTOC__

Dams in Sri Lanka

Irrigation dams with a length and height of more than and are listed, including all the state-run hydroelectric power stations. Privately owned "small-hydro" facilities (which are limited to a maximum nameplate capacity of ), 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) Type Bowatenna Hydroelectricity 226 30 40 Gravity Broadlands Hydroelectricity 114 24 35 Gravity Canyon Hydroelectricity 100 Arch-gravity Castlereigh Hydroelectricity 50 Gravity Deduru Oya Hydroelectricity 2,400 20 1.5 Embankment Dyraaba Hydroelectricity 165 50 120 Gravity Gal Oya Hydroelectricity 1,100 43 12 Embankment Inginimitiya Irrigation 4,880 18 N/A Embankment Kalu Ganga Irrigation 546 67 N/A Gravity Kandalama Irrigation 1,600 21 N/A Embankment Kantale Irrigation 4,200 15 N/A Embankment Kotmale Hydroelectricity 600 87 201 Gravity Kukule Ganga Hydroelectricity 110 20 80 Gravity Laxapana Hydroelectricity 75 Gravity Lower Malvathu Oya Irrigation Lunugamwehera Irrigation N/A Embankment Maduru Oya Irrigation 1,090 41 N/A Embankment Maskeliya Hydroelectricity 60 Gravity Moragahakanda Hydroelectricity 65 25 Gravity Moragolla Hydroelectricity 35 30 Gravity Norton Hydroelectricity 50 Gravity Nilambe Hydroelectricity 70 3.2 Gravity Polgolla Hydroelectricity 144 14.6 40 Gravity Puhulpola Irrigation 175 45 NA Gravity Rajanganaya Irrigation N/A Embankment Randenigala Hydroelectricity 485 94 126 Embankment Rambakan Oya Irrigation 1225 24.7 N/A Embankment Rantembe Hydroelectricity 420 42 52 Gravity Ratkinda Irrigation 4,960 25 N/A Embankment Ratkinda/Ulhitiya Dam Samanala Hydroelectricity 530 110 124 Embankment Udawalawe Hydroelectricity 3,900 6 Embankment Ulhitiya Irrigation N/A Embankment Upper Kotmale Hydroelectricity 180 35 150 Gravity Victoria Hydroelectricity 520 122 210 Arch

List of dams and reservoirs in Sri Lanka

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