 Whereas a late summer and early fall harvesting time has been documented at other Chacoan sites, the tree felling for Chetro Ketl was undertaken primarily during the spring and early summer.This may indicate that enough in-house labor was available during the farming season, or that specialized groups of Chacoans were dedicated to tree felling irrespective of the agriculture cycle, when most others were busy with field preparation and planting.One particularly well sampled room suggests that wood was cut during the relatively short span of a couple of weeks per season.