Carrapatelo Dam (Portuguese: Barragem do Carrapatelo) is a concrete gravity dam on the Douro, where the river forms the border line between the districts of Porto and Viseu. It is located in the municipalities of Marco de Canaveses, in Porto District, and Cinfães, Viseu District, Portugal. Construction of the dam began in 1964. The dam was completed in 1972. It is owned by Companhia Portuguesa de Produção de Electricidade (CPPE).