Kehelgamu Oya

The Kehelgamu Oya (translated into Kehelgamu River from Sinhala) is a major upstream tributary of the Kelani River. The tributary measures 50 km (31 mi) in length, originating from the hills of the Horton Plains National Park, before passing through the Castlereigh Reservoir. Kehelgamu Oya converges with the Maskeliya Oya at Kalugala, forming the 100 km (62 mi) long Kelani River. The river is heavily used for hydroelectric power generation.[1][2]

Kehelgamu Oya
Downstream view of the Kehelgamu Oya, as seen from the bridge near Kalugala, Sri Lanka.
Physical characteristics
SourceHorton Plains
 • location
 • coordinates
06°58′58″N 80°27′00″E / 6.98278°N 80.45000°E / 6.98278; 80.45000
Length50 km (31 mi)
Basin features
River systemKelani

Features on the riverEdit

The following table lists the features along the Kehelgamu Oya, from its origins further upstream. Some dams hold back water, and transfer a percentage of it to hydroelectric power stations located further downstream, via tunnels.

Type Subject Location
Water airport Castlereigh Water Airport 06°51′33″N 80°35′00″E / 6.85917°N 80.58333°E / 6.85917; 80.58333 (Castlereigh Water Airport (IATA: NUF))
Dam Castlereigh Dam 06°52′24″N 80°33′59″E / 6.87333°N 80.56639°E / 6.87333; 80.56639 (Castlereigh Dam)
Power station Wimalasurendra Power Station 06°54′31″N 80°31′30″E / 6.90861°N 80.52500°E / 6.90861; 80.52500 (Wimalasurendra Power Station)
Dam Norton Dam 06°54′50″N 80°31′18″E / 6.91389°N 80.52167°E / 6.91389; 80.52167 (Norton Dam)
Waterfall Aberdeen Falls 06°56′55″N 80°30′07″E / 6.94861°N 80.50194°E / 6.94861; 80.50194 (Aberdeen Falls)
Dam Kehelgamu Weir 06°59′07″N 80°27′24″E / 6.98528°N 80.45667°E / 6.98528; 80.45667 (Kehelgamu Weir)
Confluence Kelani River 06°58′58″N 80°27′00″E / 6.98278°N 80.45000°E / 6.98278; 80.45000 (Confluence of Kehelgamu Oya and Maskeliya Oya)

See alsoEdit

Map all coordinates using: OpenStreetMap 
Download coordinates as: KML


  1. ^ "Issues of Kelani River Basin" (PDF). Retrieved 21 January 2014.
  2. ^ "CEB Hydropower Generation". Ceylon Electricity Board. Archived from the original on 18 January 2014. Retrieved 18 January 2014.