The performance of the Ituango Dam is analyzed in this document by comparing the results of geotechnical instrumentation with analytical and numerical models.Ituango Hydropower Plant Project has an Earth Core Rockfill Dam with modifications in its upper 50 meters.These modifications include a bentonite cement cutoff wall.The analyses focus on the behavior of pore pressures, settlements, and total stresses to identify the level of performance of the dam fills, the foundation, and important elements such as the cutoff wall indicated above.The field measurements (considering their range of statistical variation) are compared with the outcomes from analytical and finite element models in 2D and 3D.The geotechnical performance analysis of the dam corresponds to the current state, 3 years after its construction was completed.Through this research, it was found that the degree of correlation between field measurements and numerical calculations is high and, therefore, the measured variables are within what was expected.This information has also been of particular importance for the identification of anomalous behaviors, which complements the project's risk management plan.