 Because Chetro Ketl has only been partially excavated definitive conclusions remain elusive.In 1937, W. W. Postlethwaite, who had for three seasons directed Hewett's excavation of Chetro Ketl's great kiva, oversaw the final work at the site conducted by the University of New Mexico and the School of American Research.Lekson describes Chetro Ketl as "notoriously sterile", and states that "it is impossible to say how much material was recovered during the many seasons" of excavation there.