| Tsiazompaniry Dam | |
| Location Map: | Madagascar |
| Coordinates: | -19.2546°N 47.8457°W |
| Country: | Madagascar |
| Location: | Tsiazompaniry, Analamanga Region |
| Purpose: | Power, water supply |
| Status: | O |
| Owner: | Jirama |
| Dam Type: | Buttress |
| Dam Crosses: | Varahina-South River |
| Dam Height: | 27m (89feet) |
| Res Capacity Total: | 260000000m2 |
| Res Surface: | 31km2 |
The Tsiazompaniry Dam is a buttress dam on the Varahina-South River, a tributary of the Ikopa River, near Tsiazompaniry in the Analamanga Region of Madagascar. The dam was constructed by a French firm in 1956. It creates Lake Tsiazompaniry, the largest reservoir in the country, which has a surface area of 31km2 and a storage volume of 260000000m2. A second buttress dam, 1km (01miles) northwest of the main dam helps withhold the reservoir. Water released from the dam supplies a regulated flow to hydroelectric power station at the Antelomita Dam downstream.[1] [2] Efforts to install a 5.25 MW power station at the base of the dam began in 2011.[3]