| Andekaleka Dam | |
| Location Map: | Madagascar |
| Coordinates: | -18.7942°N 48.6193°W |
| Country: | Madagascar |
| Location: | Andekaleka, Analamanga Region |
| Purpose: | Power |
| Status: | O |
| Construction Began: | 1978 |
| Opening: | 1982 |
| Cost: | US$142.1 million |
| Owner: | Jirama |
| Dam Type: | Gravity |
| Dam Crosses: | Vohitra River |
| Dam Length: | 125m (410feet) |
| Dam Height: | 10m (30feet) |
| Plant Name: | Andekaleka Hydroelectric Power Station |
| Plant Coordinates: | -18.8034°N 48.6556°W |
| Plant Commission: | 1982, 2012 |
| Plant Turbines: | 2 x 29MW, 1 x 33MW Francis-type |
| Plant Hydraulic Head: | 235m (771feet) |
| Plant Capacity: | 91MW |
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 headrace tunnel where it reaches a underground power station. After water charges the turbine-generators, it travels down a tailrace tunnel before it reenters the Vohitra River. The drop in elevation between the dam and power station affords a hydraulic head of .[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]
On 02 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]