Franco liked to build dams. He had one build in the next province up from us, in Zamora, in a place called Ribadelago which he opened in 1956.
In 1959 it burst and killed 144 of the 549 inhabitants of the village in its shadow in a little under 15 minutes. They recovered just 28 of the bodies. The disaster wasn't exactly hushed up but it was certainly played down by the Government of the day. An Enquiry blamed the failiure on poor materials, poor construction and irresponsibility of the engineering team.
I noticed a small piece in the local paper that said some 500,000€ had been earmarked to improve the dam on the Agueda, the river that flows through Ciudad Rodrigo. If that one were to go it may cause us some problems. We drove up to have a look. It was built in 1931 and it looks sturdy enough.