At the time of the designation in 1964, it was stated:
Mitchell Site is the only reliably dated site (c. 1000) pertaining to the Lower James River Phase (Initial Variant) of the migration of late Woodland-Mississippian culture to the Middle Missouri Valley. It is distinctive for its evidence relating mortuary practices to other intra-site practices.
The site contains what was once a village made of lodges surrounded by palisades. The site is managed by a nonprofit organization and is open to the public.
The people who once lived on the Mitchell site acquired their food from many different sources. The discovery of food processing tools and carbonized seeds suggest that these people were growing much of their food. Artifacts, such as hoes and squash knives are also good indicators that they were farmers. Various types of carbonized seeds and corn cobs show they were growing corn, beans, squash, sunflowers and tobacco. 
^ abc"Mitchell Site". National Historic Landmark summary listing. National Park Service. Retrieved 2008-06-22.
^Note: A National Register of Historic Places Inventory-Nomination document should be available upon request from the National Park Service for this site, but it appears not to be available on-line from the NPS Focus search site.