But Evandro Miguel, president of Inambari Geração de Energia — which is charged with overseeing the construction of the $4bn, 2.2-gigawatt dam — is clear on the issue.

The Inambari is the first of five dams totalling 6GW — to be built at an estimated cost of $16bn — that Brazil is negotiating with Peru. Brazil hopes to build up to 15 hydro projects in Peru totalling 20GW as it searches for more electricity for its rapidly expanding economy.

Miguel