 Hundreds of tree-ring dates from Salmon indicate that the first and perhaps second stories were built between 1090 and 1095, using wood cut over a decade.The plan of the Salmon great house is very similar to that of Hungo Pavi in Chaco Canyon and nearby Aztec Ruins, built after Salmon between 1100 and 1125.The Chacoan occupation of Salmon ended by 1125, but the site was not abandoned.