Interventions in the canals on the left bank of the S. Domingos river, namely channel 1 (the main channel for collecting runoffs from the slopes to the east of the S. Domingos stream), with 8.616 km in length, and in channel 2 (marginal secondary channel to the reservoir of Tapada de São Bento), with 0.856 km of extension, and complementary hydraulic works (hydraulic passages, protective structures in gabion and special protective structures).