| Engineer Sérgio Motta (Porto Primavera) Dam | |
| Name Official: | Sérgio Motta Hydroelectric Power Plant |
| Dam Crosses: | Paraná River |
| Location: | Rosana, São Paulo, Brazil |
| Dam Type: | Embankment, concrete portion |
| Dam Length: | 11380m (37,340feet) |
| Dam Height: | 22m (72feet) |
| Spillway Type: | Service, gate-controlled |
| Construction Began: | 1980 |
| Opening: | 1999 |
| Cost: | $9 billion USD |
| Owner: | CESP |
| Res Name: | Sérgio Motta Reservoir |
| Res Capacity Total: | 19.9km3[1] |
| Res Surface: | 2250km2 |
| Plant Turbines: | 14 x 110MW Kaplan turbines |
| Plant Capacity: | 1540MW |
| Plant Annual Gen: | 10.5TWh[2] |
| Plant Type: | C |
| Plant Commission: | 1999 - 2003 |
| Location Map: | Brazil |
| Coordinates: | -22.4753°N -52.9583°W |
The Engineer Sérgio Motta Dam, formerly known as the Porto Primavera Dam, is an embankment dam on the Paraná River near Rosana in São Paulo, Brazil. It was constructed between 1980 and 1999 for hydroelectric power production, flood control and navigation. An estimated 11 million tropical trees were submerged.
The dam is named for Sergio Roberto Vieira da Motta, a prominent industrial engineer in São Paulo. At in length, it is the longest dam in Brazil.[3] [4]
The tall dam creates a reservoir with a 19.9km3 capacity and surface area of .The dam supports hydroelectric power plant on its southern end with an installed capacity of . The power plant contains 14 x Kaplan turbine generators.Although there are no plans to install them, the power plant has room to accommodate an additional four generators.[4] The dam also supports a 210m (690feet) long and 17m (56feet) wide navigation lock on its southern end with the ability to transport 27 million tons a year.[5]
Construction on the dam began in 1980 and the first filling of the reservoir to above sea level was complete by 1998. It was inaugurated in 1999 with the first three generators commissioned in March. In 2000, five more generators came online and by 2001, a total of ten were in operation. The second filling to above sea level was complete in March 2001 and by October 2003, all 14 generators were in operation.[6] [7]
The dam flooded of the Lagoa São Paulo Reserve and of the Great Pontal Reserve.In compensation, the Companhia Energética de São Paulo (CESP) created the Rio Ivinhema State Park, the Rio do Peixe State Park, the Aguapeí State Park and the Cisalpina Private Natural Heritage Reserve.
In 2005, an infestation of Hydrilla verticillata was discovered in the reservoir, the first time the invasive weed was discovered in Brazil. The dam has also had negative effects on downstream fish reproduction[8] and has a 520m (1,710feet) long fish ladder.[9]