Pueblo del Arroyo
	Between 1025 and 1075 the population of Chaco Canyon doubled. There were as many as 6,000 people living in some 400 sites scattered in and around the canyon. Construction of Pueblo del Arroyo began during this period. It was 3 or 4 stories high, had nearly 300 rooms, and 14 kivas. Its most notable feature is one of very few tri-walled kivas ever discovered.