Daivões Dam

Daivões Dam (Barragem de Daivões) is a concrete arch-gravity dam on the Tâmega River. It is located in the municipalities of Ribeira de Pena and Cabeceiras de Basto, in Vila Real and Braga Districts, respectively, Portugal and it is part of the wider Tâmega Electricity-Generating Group formed of 3 dams and 3 plants

Iberdrola signed a 70 year concession with the Government of Portugal in July 2014 for the design, construction and operation of three projects: Alto Tâmega, Daivões and Gouvães dams.

Construction of the dam completed in July 2022.

Dam
Daivões Dam is a 77.5 m tall, 264 m long dam.

Reservoir
The reservoir surface area for the dam has 1.76 km2.

Power plant
The generating unit of the dam consists of two 57 MW Francis turbine units with a maximum flow rate of 220m³/s and a small 4.1 MW unit to turbine the ecological flow, producing 159 GWh of electricity a year. The spillways are located over the dam and consist of four radial gates with a width of 11.5 m and height of 9 m each with a maximum discharge capacities of 3,400 m³/s.