This submersible robot executes submerged inspection with high precision for hydroelectrics dam. It uses exclusive high-technology to inspect lintels, sills, recesses valves, girders and traps of the dam of the upstream and downstream faces. It evaluates the condition of the structures and track anomalies detected to establish a deterioration profile. It also makes the measurement of flatness, parallelism and squareness of the structure to anticipate, prevent and solve problems such as leaks and jammed components. It uses AMD 3D geo-referenced site laser imaging system. This robot system reduces costs and downtimes. It improves worker safety and results accuracy.