Archaeologists often discover that significant historic and prehistoric sites lie in the path of development. Such was the case when the 760-mile-long Overland Pass Pipeline was built to transport natural gas liquids between southwestern Wyoming and west-central Kansas. The book provides a cultural overview of the past 13,000 years of human history in southern Wyoming, northwestern Colorado, and western Kansas. The results of the archaeological investigations are integrated into the broader picture of of regional history and prehistory and are summarized in "timelines" that graphically compare developments in the project area, across North America, and throughout the world.