The dataset contains records of freshwater bivalves (Mollusca, Bivalvia) collected in the rivers Sabor. Maçãs and Angueira, and included in the Complementary Measures Program of the Baixo Sabor and Feiticeiro Hydroelectric Dams - AHBS (Complementary Measure MC10), promoted by EDP – Energias de Portugal, S.A. Data were collected between June 2015 and July 2020, during field visits to 60 fixed stations. The target species were Unio delphinus, Anodonta anatina and Potomida littoralis. A total of 14135 specimens if the three species was recorded.