This paper presents the results of an instrumented block-faced geogrid wall built in São José dos CamposSPBrazil. Fine-grained tropical soils were used as a backfill for the wall construction. The performance of the wall was good. Laboratory tests were carried out to determine the parameters. The wall height at the instrumented section was 4.2m. Monitoring was carried out for two months, including during the construction period. Reinforcement tension was measured through load cells at different locations in four different layers. A specific device was designed and used for monitoring vertical and horizontal internal loads on the blocks that composed the wall face. Topography, inclinometers and magnetic settlement plates were used for the measurement of internal and external movement. Total pressure cells at five different locations near the foundation level measured vertical stress. Comparisons between theoretical and measured values of tension in the reinforcement are also presented.