flow control structure and the three stage sloping water outlets, Barragem de Odelouca in the Odelouca river valley, Algarve, Portugal. The structure is at the head of the Odelouca - Funcho - Alcantarilha tunnel which links and transports water along an 8 kilometer system to the water treatment plant at Alcantarilha along with a 12 kilometer branch tunnel fron the Barragem Funcho