Structure UU1 was a residential structure located a little over 100 meters south of the southwest corner of Structure BB1. This was relatively small residence. We began the excavation with a 3 x 3 meter block, which encountered some (sparse) evidence of Postclassic use of the area. We then excavated a 1 x 1 meter unit into the platform to test its Preclassic period use. The unit did not reach bedrock (for safety reasons), but it did encounter a number of constructions phases. One Mamom phase construction included two burials.