Tocoma Dam

Name of Project:

Tocoma Dam


Corporación Venezolana de Guayana (C.V.G.), Electrificación del Caroní C.A. (EDELCA)

Total value:
€2,832 million, share €1,333 million

Start of works:
March 2007

Expected duration:
76 months

The project, located in the south-eastern area of the Bolivarian Republic of Venezuela, on the Caroní River, a tributary of the Orinoco River, is an integral part of the Basso Caroní Hydroelectric Project.

The main civil works include:

  • Concrete dam, 300 m long, 78 m wide and 82 m high, with a built-in plant housing 10 x 216 MW Kaplan generating units, with an installed capacity of 2,160 MW
  • Right concrete transition dam, 201 m long and 61 m high
  • Left rock embankment dam with concrete surface, 3,800 m long and 41 m high
  • Right earth and rock embankment dam with clay core, 1,900 m long and 50 m high
  • Bottom drainage
  • Concrete surface spillway, equipped with 10 radial sluices with a 15.24 m opening, 176 m long, 75 m wide and 61 m high
  • Electromechanical equipment assembly building, adjacent to the plant (72 m x 60 m x h 60 m).
  • Control and operation building, located between the plant and the spillway (70 m x 75 m x h 40 m).
  • Drainage channel excavated in the rock, with a volume of approximately 4,700,000 m³.
  • Platform for electric substation 105,000 m².
  • Railway line, movement of track by approximately 9 km, including excavations, embankments and reinforcements.

Electromechanical works:

  • Supply of equipment and systems for the hydroelectric plant (water, fire-prevention, drainage, electrical, air conditioning, ventilation, compressed air, oil purification systems, lifts and roll-off frames, electrical and mechanical workshop, etc.), excluding the 10 generating units.
  • Supply of equipment and machinery for the spillway for the 10 units, including sluices and overhead cranes.
Excavations: 9,412,000 m3
Concrete: 1,372,250 m3
Metalwork: 4,320 tons

Last update: 26/02/2018