The Rentembe dam and power station from the most downstream
project of a cascade of reservoirs and hydro power stations on the
Mahaweli ganga in the Dumbara Valley. Rhe rantambe dam is located
just downsream of the confluence of Uma Oya with Mahaweli Ganga,
about 3 kms downstream of the Randenigala dam and 2.5 kms upstream
of the Minipe anicut. The primary function of the project is the
generation electrical energy using the water releases from
Randenigala reservvoir and the natural flow of the Uma Oya.
construction work of the project was commenced in January 1987. Most
of the civil construction wok was completed by February 1990. The
valuable timber within the reservoir bed was extracted and the
reservoir bed cleared of even shrub and stumps, by the State Timber
Corporation. The impounding of the reservoir commenced on 2nd
February 1990. and the power generating units 1 and 2 were
successfully put into commercial operation on 10th March and 10th
April 1990 respectively.
The foreign cost of the project is financed by a loan of 230 Million DM provided on concessionary terms by the Federal Republic of Germany approximating to Rs.3,027 million. Ceylon Electricity Board (CEB) is financing the local component amounting to Rs.1050 million. The project was competed as scheduled in May 1990.
The consultancy services are provided by Joint Venture Randenigala (JVR) which were a consortium of three consultancy firms namely Salzgitter Consult GmbH. Agrar Und Hydrotechnik GmbH of the Federal Republic of Germany and Electrowatt Enginerring services Ltd., of Switzerland, in association with the Central Engineering Consultancy Bureau (CECB).
A dam at Randenigala site consists with two turbaine-generator units of total installed capacity 52 MW and the power station generated 180 GWh of firm energy and 73 GWh of secondary energy.
area – 3,118 Km 2
Dam Length -
capacity – 10,235 m 3/ s
Tunnel Bottom & Irrigation Outlet
capacity – 300 m3/