Alcoa in Brazil
Hydroelectrics 
Barra Grande
Estreito
Machadinho
The environment
Community
Main features
Serra do Facão

Location 
Pelotas River between Piratuba (SC) and Maximiliano de Almeida (RS) 
Municipality on the right bank: Piratuba (SC)
Municipality on the left bank: Maximiliano de Almeida (RS)
Start of the building work: March, 1998
Conclusion: July, 2003

Reservoir
Total area: 79 km2 
Normal maximum level of the water: 480 m. 
Minimum operating level: 465 m. 
Maximum level: 485.36 m. 
Flooded area: 56.7 km2 
Lake perimeter: 500 km
Total stored volume: 3.3 km3 
Useable stored volume: 1 km3 
Average depth: 30 m. 
Basin drainage area: 32,050 km2 

Dam
Type of structure / material: Junction, faced with concrete
Height of the crest: 485.50 m. 
Maximum height: 126 m. 
Length of the crest: 700 m. 

Socio-environmental actions
Families resettled and compensated: 2,076
Rural nuclei covered: 3
Reforestation and conservation of native forest vegetation: 1.1 million saplings

Infrastructure
Properties affected: 1,272
Electricity network rebuilt: 24 km 
Roads relocated and improved: 185 km 
Water collection and distribution network: 27 km 

Spillway
Type: surface
Maximum outflow (exceptional): 35,703 m³/sec
Number of sluice gates: 8
Dimensions of sluices: 8

Intake channel
Type: alleviated gravity
Length: 61.20 m. 
Maximum height: 47.20 m. 
Number of individual inlets: 3

Dikes
Number: 2 (on land)
Length of the crest: 394/336 m 
Maximum height: 22/31 meters

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