| Rio Grande Hydroelectric Complex | |
| Coordinates: | -32.2218°N -64.6365°W |
| Country: | Argentina |
| Location: | Calamuchita Department, Córdoba Province |
| Status: | O |
| Construction Began: | 1976 |
| Opening: | 1986 |
| Cost: | US$315 million |
| Owner: | Provincial Power Company Córdoba |
| Res Name: | Cerro Pelado Reservoir |
| Res Capacity Total: | 3675000m2 |
| Lower Res Name: | Arroyo Corto Reservoir |
| Lower Res Capacity Total: | 1600000m2 |
| Plant Turbines: | 4 x 187.5 MW reversible Francis-type |
| Plant Hydraulic Head: | 185m (607feet) |
| Plant Capacity: | 750MW |
| Plant Annual Gen: | 977GWh |
The Rio Grande Hydroelectric Complex is a pumped-storage hydroelectric power station in the Calamuchita Department of Córdoba Province, Argentina. The complex consists of two dams and a power station in the Cerro Pelado Valley. Aside from power generation, the complex also serves to control floods and provide municipal water. The two dams on the Tercero River are the Cerro Pelado Dam which forms the upper reservoir and the Arroyo Corto Dam which forms the lower reservoir. The Cerro Pelado dam is 104m (341feet) high and long while the Arroyo Corto is tall and in length. Water from the upper reservoir is sent to the underground power station during periods of high power demand. The power station contains four reversible Francis turbine-generators. Water from the power station is discharged into the lower reservoir. During periods of lower power demand such as at night, water is pumped with the same turbines back up to the upper reservoir for use in peak hours. The difference in elevation between the two reservoirs affords a hydraulic head of .[1] Construction on the complex began in 1976 and the generators were commissioned in 1986.[2]