Here is the Dam in Cameroon Causing Annual Flooding in Nigeria..

Communities in Benue, Adamawa, Taraba, Anambra, Rivers, Bayelsa, Nasarawa and other states have also been devastated by the flooding that has destroyed many homes and lives in Kogi state.

In 1977, construction of the Lagdo Dam, located in Northern Cameroon began and was completed in 1982.

Initially, the Cameroonian and Nigerian Government's had agreed to build two dams so that when excess water is released from the Cameronian dam, it will be contained by the Nigerian dam which would be two and a half times bigger and won't result in flooding

However, the Nigerian Government agreed to construct the Dasin Hausa Dam in Adamawa State to lessen the impact of any potential flooding from the Lagdo dam in Cameroon.

But regrettably, the Dasin Hausa dam has not been completed since 1982 and this has led to the yearly flooding in Nigeria.

Hmmmn

So a dam of such national significance had not been completed since 1982!