The Manduriacu Hydroelectric Plant uses the waters of the Guayllabamba River and has 60 MW of installed power.
The main structure of the powerhouse is 66,2 m in length and 17,7 m in width. It rises between the 459,0 level (the foundation of the alignment B columns) to the 481,70 level (maximum height of the roof). The main structure will house two generating units with vertical axis turbines. The floor at 459,0 level is an assembly area and at the 465,0 level is the main floor. Additionally, at the 474,2 level, will be installed the overhead crane, which will serve to the equipment assembly and maintenance, culminating in the deck at the 481,70 level, at its highest point. Additionally, the structure has two side galleries, with approximately 5 m wide and variable lengths, for the settlement of workshops, control rooms and secondary support equipment.
Structurally, the steel structure of the powerhouse is constituted by ten transverse frames which support part of the floor at the 459,0 level, the overhead crane rails and the roof.
The roof is a metal structure made up of a metallic coating, supported by metal bracing beams type G, which rest on the main beams on each of the transverse frames. The roof coating consists on a trapezoidal base steel plate pre-painted (inner plate), thermal and acoustic insulation on the inside and a system of profiled metal sheets on the outside.