The Joint Monitoring Index Blocks Response of the Dam (IMCRB) was created by analysing the series of sensors for monitoring the displacements of structures and foundations, from two buttresses blocks in Excerpt D located in Itaipu’s dam, considering the action of the ambient temperature and the water level of the reservoir. This index contributes to the diagnosis of changes in the standard behaviour of the dam structure, and after its formulation was validated in this same section. In the following study, the IMCRB is reformulated and validated for the two blocks of Excerpts F and other two Excerpt I, the manual measurement data of the following tools: pendulum, ancillary bases, shaft extensometer and Piezometers acquired between January 1990 until November of 2017. The IMCRB reworking involved the using of statistical methods: factor analyses, analyses of series, confidence intervals, with a big participation in the modeling and the remaining set for index validation. The reworked Joint Monitoring Index Blocks Responses (IMCRB) of dam can help in the overall performance analyses of selected blocks concrete structures, preview its behavior and help in the anomalies data identification, felicitating in the decision making.