These architectural resources date from the Archaic Period (circa 7000BC to AD1) and represent the archaic stage in Colorado. This stage is generalized by a lifestyle of hunting and gathering.
The architectural resources include ruins of several types of human construction in association with various artifacts. Most frequently occurring are pit structures, timbered lodges, surface mud-and-stick buildings, and surface masonry buildings. (Cover documentation accepted by National Register in 1991, accepted for the State Register 6/9/2004.)