The Pharr Mounds have become an important archaeological site. The National Park Service excavated four of the mounds in 1966. There were various internal features discovered within the mounds, including fire pits and clay platforms. There were also human remains found inside, both cremated and unburned. Ceremonial artifacts were also discovered inside, including copper spools, ceramic vessels, a greenstone platform pipe, mica, and lumps of galena, which is a shiny lead ore.
Several items found within the mounds are not known to originate in Mississippi, implying the existence of trade networks that reached distant places. The copper items and the greenstone are not native to the area, and neither are the galena and mica. These items were likely imported through long distance trade routes, meaning the tribe had access to items from outside the Mississippi area.