 While it once stood at forty feet above sea level, a combination of public works projects on the nearby roads and natural erosion have reduced the height of the mound by about 10 feet.The mound was built by Native Americans of the late St. Johns II cultural period, as indicated by the finding of pre-Columbian "chalky ware" ceramics dating to later than 800 AD.These overlie earlier relics of the St. Johns I cultural period, the cultural period following the Archaic period.