Located in the catchment basin of the river Vouga, this plant abstracts water from the Águas Frias stream and returns it to the river Sul. Construction on the plant began in November 2001 with operations beginning in November 2002. Equipped with one Francis turbine, the facility has an installed capacity of 2.2 MW and an expected annual production of 4.5 GWh (average is 4.5GWh). Head is 115m and flow 2.5 m3/s. The concession for the Águas Frias was granted in November 2002 and matures in 2037.