Mitchell Springs 

From about AD 500-900, The Montezuma Valley of southwestern Colorado was one of the most densely populated areas in the northern Southwest.  During the Pueblo I era, the largest populations in the northern Southwest could be found there.  After a period of outmigration beginning at the end of the 800s, population in the Valley remained low until it began to rebound after the first quarter of the 1000s.  Only a few very large sites were continuously occupied during the Basketmaker III-Pueblo III era and most of those were located near good soils,  a reliable available water source, and good resources.