Between 1500 and 1150 BCE San José Mogote grew from a few house structures to a
village occupying a land area of about 2000 m2 (five
acres), the largest of some 25 villages in the Valley of the Oaxaca and the only community in the area with public buildings (Price and Feinman 2005:320-321). The introduction of two methods of
irrigation may have been responsible for improving agricultural productivity. These included running irrigation
ditches from streams and "pot irrigation", which consisted of dipping water out of a number of shallow wells to pour onto the crops (Evans 2004, p. 145). Settlement at the site consists of a number of distinct
households that form the basic social units at San José Mogote. A typical household unit at San José Mogote contained
braziers, earth ovens and/or
hearths for cooking, stone
manos and
metates for grinding, and blackened
pottery. Food, including
maize, was stored in pits that were bell-shaped and located outside the house walls. Later, trash was dumped into these pits, forming
midden deposits. Burials and other activity areas were also located in areas adjacent to the house structures. Evidence of ritual includes human and animal figurines associated with burials. Basic indicators of long-distance trade include
obsidian chipped stone artifacts. Obsidian is a material not locally available in the Valley of Oaxaca. After 1150 BCE other settlements in the area remained small, but the village of San José Mogote increased in population and in the elaboration of its public structures, an indication of its role as the controlling capital over the other villages. Between 900 and 600 BCE, the population in the valley increased threefold to 2000 people living in 40 communities, with half of that number residing in San José Mogote, which grew to in size (Evans 2004, p. 145). A community building, which has been called a "men's home", is believed to have served as a place where the men of the village could gather for civic and ceremonial purposes. The building's ceremonial importance is signified by its orientation of eight degrees west of north.
La Venta, an important
Olmec site, has the same orientation, which indicates an understanding of astronomy and a calendar system (Evans 2004, pp. 122–123). Exclusively at San José Mogote
mirrors of polished
magnetite were made and traded to the Olmec Gulf Coast, some distant. Trade with other areas is also suggested by the greater quantities of obsidian and ceremonial objects, such as drums made from turtle shells, conch-shell trumpets, and stingray spines, as well as pottery designs associated with the Olmec groups, especially at the site of San José de Mogote (Price and Feinman 2005, p. 321). By 700 BC the population of San José Mogote continued to increase. Between 700 and 500 BC, 3500 people occupied the Valley of Oaxaca, with about 1000 living at San José Mogote, which covered approximately (Evans 2004, p. 187). Major public buildings constructed with adobe bricks and large blocks of stone were built on top of dirt mounds. The largest complex of the area prior to 500 BCE was Mound 1 at San José Mogote, which was constructed atop a hill that was augmented to a height of . ==Political organization==