Carrapatelo Dam

Carrapatelo Dam is a 57 m tall (height above foundation) and 400 m long gravity dam with a crest altitude of 55 m. The volume of the dam is 190,000 m³. The spillway is part of the dam body (maximum discharge 22,000 m³/s). There is also a bottom outlet. ==Reservoir==

At full reservoir level of 46.5 m the reservoir of the dam has a surface area of 9.52 km² and its total capacity is 148.4 mio. m³. The active capacity is 9 (15,6 or 16) mio. m³. ==Power plant ==

The run-of-the-river hydroelectric power plant went operational in 1971. It is owned by CPPE, but operated by EDP. The plant has a nameplate capacity of 201 (180) MW. Its average annual generation is 806.1 (783, 870.6 or 882) GWh. The power station contains 3 Kaplan turbine-generators with 63.4 MW each in a dam powerhouse. The turbine rotation is 115.4 rpm. The minimum hydraulic head is 20 m, the maximum 37 m. Maximum flow per turbine is 290 m³/s. The first 2 machines went operational in 1971, the third in 1972. The turbines were provided by Kværner, the generators by Brown, Boveri & Cie. ==Lock==

On the right side of the dam is a lock, which can handle ships with the following maximum properties: 83 m in length, 11.40 m on the beam, 3.8 m load-draught and a cargo capacity of 2500 tons. The water level change through the lock is about 35 m. ==See also==