This is an local earth dam which boasts a concrete middle section, of a total 4,347 m in length, and a width of 10 m at the crown and 216 m at the foundation. The dam meant that the flow of water of the Rio Dulce could be controlled for the purposes of the power plant as well as irrigation and flood mitigation.
The upstream bank has a slope with a gradient of 1:4 from 149,25 m to 268.52 m elevation and a gradient of 1:3 from the latter to 278.5 m. There were three protection layers. The first, is 30 cm thick and made of sand and clean gravel. The second has the same thickness and is made of pebbles (with a diameter between 1/4″ to 4″) and the third is made of cast stone or rip-rap and is 75 cm thick as a defense against the surf.
The downstream bank has a slope with a gradient of 1:3 with two 3 m berms at 258.50 m and 268.52 m.