|Pueblo del Arroyo|
Located just above the modern channel of the Chaco wash, Pueblo del Arroyo was constructed in four identifiable stages between A. D. 1065 and perhaps as late as 1140.
Its most unique feature, the Tri-Wall which has a single tree-ring date of 1109, suggests a connection with the northern populations of the Animas. As with other Tri-wall structures, its function is uncertain.
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