Machadinho Hydroelectric Power Plant

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Machadinho Dam
Machadinho Hydroelectric Power Plant is located in Brazil
Machadinho Hydroelectric Power Plant
Location of Machadinho Dam in Brazil
Official name Machadinho Hydroelectric Power Plant
Location Machadinho, Santa Catarina/Rio Grande do Sul, Brazil
Coordinates 27°31′31″S 51°47′07″W / 27.52528°S 51.78528°W / -27.52528; -51.78528Coordinates: 27°31′31″S 51°47′07″W / 27.52528°S 51.78528°W / -27.52528; -51.78528
Construction began March 2, 1998
Opening date 2002
Construction cost $1.4 billion USD
Owner(s) Machadinho Energetica
Dam and spillways
Type of dam Embankment, concrete face rock-fill
Impounds Pelotas River
Height 126 m (413 ft)
Length 700 m (2,300 ft)
Spillway type Service, controlled
Spillway capacity 35,703 m3/s (1,260,800 cu ft/s)
Creates Itá Reservoir
Total capacity 3,300×10^6 m3 (2,700,000 acre⋅ft)
Catchment area 32,500 km2 (12,500 sq mi)
Surface area 79 km2 (31 sq mi)
Power Station
Commission date 2002
Type Conventional
Turbines 3 x 380 MW (510,000 hp) Francis turbines
Installed capacity 1,140 MW (1,530,000 hp)
Machadinho Energetica

The Machadinho Hydroelectric Power Plant is a dam and hydroelectric power plant on the Pelotas River near Machadinho on the border of Santa Catarina and Rio Grande do Sul, Brazil. The power station has a 1,140 MW (1,530,000 hp) capacity and is supplied with water by a concrete face rock-fill embankment dam. It is owned and operated by Machadinho Energetica and produces the equivalent of 37% of the energy consumed in Santa Catarina.[1]


Since 1966 and 1981, a series of studies were carried out on the Machadinho Dam and by 1982 a design was submitted and approved. The plant was slated to being commercial operations in 1993 but the project was delayed because of environmental concerns. The designers reevaluated the project and moved the dam's location further upstream on the river. After a new series of studies and new design were submitted, the project was approved in 1995. The design was prepared by Coyne et Bellier.[2] Construction began on March 2, 1998 and by October 26, 1999, the river diversion was complete. By August 28, 2001, the dam was near completion and it began to impound the Pelotas River. On February 16, 2002, the first generator began to operate and by August 31, 2002 the dam was completed.[3]

Machadinho Dam[edit]

The Machadinho Dam is a 700-metre (2,300 ft) long and 126-metre (413 ft) high concrete face rock-fill embankment dam with a crest elevation of 480 metres (1,570 ft) above sea level. The dam's reservoir has a capacity of 3,300×10^6 m3 (2,700,000 acre⋅ft), a surface area of 79 square kilometres (31 sq mi) and a catchment area of 32,500 square kilometres (12,500 sq mi). The dam supports a spillway with eight floodgates measuring 21.8 metres (72 ft) wide and 18 metres (59 ft) tall with maximum capacity of 35,703 cubic metres per second (1,260,800 cu ft/s).[3][4]

Power plant[edit]

The above ground power station is 130.2 metres (427 ft) long and 37.5 metres (123 ft) wide and contains three 136 ton, 380 megawatts (510,000 hp) generators powered by Francis turbines. The first generator was commissioned February 16, 2002, the second on April 30 and the final on December 7 of that same year.[3]

See also[edit]


  1. ^ "Plant". Machadinho Energia. Retrieved 12 September 2010. 
  2. ^ "Plant -> Deployment" (in Portuguese). Machadinho Energia. Retrieved 12 September 2010. 
  3. ^ a b c "Plant - > Technical" (in Portuguese). Machadinho Energia. Retrieved 12 September 2010. 
  4. ^ "Hydroelectric Plants in Brazil - Santa Catarina". Indust Cards. Archived from the original on 20 August 2010. Retrieved 12 September 2010.