The Gehring Site (11MS99) is a multi-component site located in the northern American Bottom at the base of the bluffs. The site is best known for its Middle Woodland component, with evidence of occupations ranging from the Paleoindian to historic time periods. Excavations by the Southern Illinois University Edwardsville archaeological field schools exposed two Mississippian wall trench structures, at the southern end of the site. While the basal portions of the structures remain, much of the structures and other Mississippian features are severely truncated due to historic plowing. Despite the damage, analysis indicates that the two structures are part of a small farmstead occupation that dates to the Moorehead and Stirling phases. Feature 212 dates to the Moorehead phase, while Feature 257 dates to the Stirling phase. The population was a small food production site with no evidence of being a cultural or political center of the region.