Dams and power plants

The Miguillas Hydroelectric Project

Ayesa was responsible for the engineering of the Miguillas Hydroelectric Project.

It consisted of two linked increments, with machinery rooms in Umapalca and Palillada, taking advantage of a total catchment basin of 582 km2.

The Umapalca system takes water from four rivers, with intakes in each of them. Moreover, upstream from one of the intakes, on the Calachaka- Jahuira River, it also included a dam for regulating the flows and preventing flooding. The water taken at each point is then transported by various tunnels to the machinery room area.

The Palillada system takes the water from this power plant in Umapalca from the return channel and transports it via a tunnel to the Palillada power plant. Water taken from the other four intakes is also transported via this tunnel. Each power plant has a loading chamber with a capacity of 80,000 m3, from which pressurized pipes exit.

Unique features:

  • A hardfill dam, with a capacity of 4.04 hm3, a height of 29 m and a crest length of 321 m. 
  • Five headworks
  • Hydraulic tunnels 
  • A 142 and 26-metre aqueduct 
  • The Umapalce power plant
  • The Palillada power plant
  • 16 access roads spanning 98 kilometres.
Location
Bolivia

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