Andekaleka Dam
Dam in Andekaleka, Madagascar
From Wikipedia, the free encyclopedia
The Andekaleka Dam is a gravity dam on the Vohitra river near Andekaleka in eastern Madagascar. The primary purpose of the dam is hydroelectric power generation and it diverts water from the Vohitra east into a 4 kilometres (2.5 mi) headrace tunnel where it reaches a 91 megawatts (122,000 hp) underground power station. After water charges the turbine-generators, it travels down a 500 metres (1,600 ft) tailrace tunnel before it reenters the Vohitra River. The drop in elevation between the dam and power station affords a hydraulic head of 235 metres (771 ft).[1][2] The dam and power station were funded by the World Bank at a cost of US$142.1 million. It was constructed between 1978 and 1982.[3] The power station can house up to four generators. The first two were operational in 1982 and a third in 2012.[4] Generator one and two host Vevey and Jeumont turbines while the third is made by HEC.[5][6] They all use Francis reaction turbines[7] which typically range from 10 to 700MW [8] and with water head operating from 10 to 600 meters.[9]
| Andekaleka Dam | |
|---|---|
  Andekaleka Dam Location within Madagascar | |
| Country | Madagascar |
| Location | Andekaleka, Analamanga Region |
| Coordinates | 18°47′39.02″S 48°37′09.49″E |
| Purpose | Power |
| Status | Operational |
| Construction began | 1978 |
| Opening date | 1982 |
| Construction cost | US$142.1 million |
| Owner | Jirama |
| Dam and spillways | |
| Type of dam | Gravity |
| Impounds | Vohitra River |
| Height | 10 m (33 ft) |
| Length | 125 m (410 ft) |
| Andekaleka Hydroelectric Power Station | |
| Coordinates | 18°48′12.20″S 48°39′20.03″E |
| Commission date | 1982, 2012 |
| Hydraulic head | 235 m (771 ft) |
| Turbines | 2 x 29 MW (39,000 hp), 1 x 33 MW (44,000 hp) Francis-type |
| Installed capacity | 91 MW (122,000 hp) |
Fire
On 2 January 2022 a fire broke out in its power plant. This caused many black-outs in Antananarivo and its surroundings. The power units will be again functional around mid-June 2022.[10]
