This operation aims to implement Waste Water Drainage Systems in three locations in the municipality of Chaves, namely in Argemil da Raia (Union of parishes of Travancas and Roriz), Avelelas (in the parish of Águas Frias) and Vila Nova de Monforte (Planalto de Monforte - Union of Parishes of Oucidres de Bobadela), in order to provide the populations with adequate drainage and sewage treatment networks.