Consortium selected to build dam and hydroelectric plant in Portugal
April 28, 2017 – A consortium of Spanish conglomerate Acciona and Portuguese firms Mota Engil and Edivisa (Visabeira Group) have bagged a €110M contract from Iberdrola to build the Alto Tâmega dam and hydroelectric plant on the river Tâmega in Portugal.
The latest contract is in addition to the pre-existing €50M contract for the construction of the penstock at the Gouvães hydroelectric plant. Both contracts form part of the Tâmega River hydroelectric project that includes the construction of three hydroelectric plants: Gouvães, Alto Tâmega and Daivões.
The plants will have a combined power generation capacity of 1,158MW, which will allow Iberdrola to produce over 1,760GWh of electricity annually.
Acciona will build the Alto Tamega dam, a 106.5m-high double-curvature concrete arch, as well as the toe-of-dam hydroelectric plant, comprising two 80MW units. Furthermore, the company will construct the plant’s water circuit, river diversion works, and the plant access tunnel, among others.
For the Gouvães penstock, a 4.7km concrete-lined tunnel measuring 7.3m in diameter will be dug from four points simultaneously. Additional work includes the creation of water inlet structure in the Gouvães reservoir on the Torno River, the sluice structure and other ancillary components.