 Several regional habitations are identifiable, including the Cahal Pech site and the unexcavated site at Chaa Creek.These sites were centroids for larger farming populations, and are deemed to be satellite cities that may have been under the influence of Tikal or Caracol.The Mayan urban society collapsed in this watershed in the ninth century AD, likely related to the exhaustion of agricultural resources, or reaching of the limited carrying capacity of this region of nutrient poor soils, with possible aggravation of social factors.