| Marimbondo Dam | |
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| Official name | Usina de Marimbondo |
| Location | Fronteira, Minas Gerais, Brazil |
| Coordinates | |
| Construction began | 1971 |
| Opening date | 1975 |
| Dam and spillways | |
| Type of dam | Embankment |
| Height | 94 m (308 ft) |
| Length | 3,100 m (10,200 ft) |
| Crest width | 10 m (33 ft) |
| Volume | 14,400,000 m3 (510,000,000 cu ft) |
| Impounds | Grande River |
| Type of spillway | Service, gate-controlled |
| Spillway capacity | 21,400 m3/s (760,000 cu ft/s) |
| Reservoir | |
| Creates | Marimbondo Reservoir |
| Capacity | 6,150,000,000 m3 (2.17×1011 cu ft) |
| Surface area | 438 km2 (169 sq mi) |
| Power station | |
| Commission date | 1975-1977 |
| Type | Yes |
| Turbines | 8 x Francis-type |
| Installed capacity | 1,440 MW |
The Marimbondo Dam is an embankment dam on the Grande River near Fronteira in Minas Gerais, Brazil. The dam serves an associated hydroelectric power plant with a 1,440 MW installed capacity.[1]
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Owned and maintained by Eletrobrás Furnas, the dam was their fourth power plant constructed. Construction began in 1971 and was complete in 1975 when the first generator went online. The last of the eight generators went online in January 1977.[2]
The Marimbondo Dam is a 3,100 m (10,200 ft) long and 94 m (308 ft) high earth-fill embankment dam with a concrete spillway and power house section. The total structural volume of materials for the dam is 14,400,000 m3 (510,000,000 cu ft). The dam's spillway contains nine floodgates that are 15 m (49 ft) wide and 18.85 m (61.8 ft) high each. In total, the spillway has a 21,400 m3/s (760,000 cu ft/s) discharge capacity. The reservoir created by the dam has a surface area of 438 km2 (169 sq mi) and capacity of 6,150,000,000 m3 (2.17×1011 cu ft) with 5,260,000,000 m3 (1.86×1011 cu ft) serving as live (active or "useful") storage. The normal reservoir level is 446.3 m (1,464 ft) above sea level and the maximum is 447.36 m (1,467.7 ft). The dam's power house is 25.3 m (83 ft) wide and 250.2 m (821 ft) long and contains eight 180 MW generators that are powered by Francis turbines.[2]