 In 1983, comprehensive architectural studies by Lekson and McKenna and dendrochronological reanalysis by Dean and Warren largely verified Hawley's construction phases, with significant additions and clarifications.Lekson, Thomas C. Windes, and Patricia Fournier, authors of "The Changing Faces of Chetro Ketl", date the beginning of construction to 990–1000; they based their estimate on 1,285 dated elements from the great house.In their opinion, Chetro Ketl was largely complete by 1075, with periodic construction occurring there until the mid-1110s, when the great kiva was remodeled.