Additional costs were made to correct engineering errors, and to finance repairs to tunnel damage in the first year of operation, resulting in substantial over-budgeting.

[3] The construction of the dam, and its reservoir, displaced several local communities with a total population of 3,445 people.

[4] Community resettlement efforts were poorly handled by the consecutive military governments at the time.

Subsequent popular protests and claims were met with extremely brutal repression by government forces, and culminated in what is known as the Río Negro Massacres.

[7] A 26 km long tunneling system with an elevation difference of 433 m, feeds the water to the plant's turbines.