Of Swan Lake's four original mounds, three were arranged in a line running parallel to the lake. Of these, only Mound B is visible today. Mound A is located a short distance to the northeast. Sixteen feet in height, Mound A is oblong in shape and has a ramp extending from its summit towards Mound B. Reports from the 1940s demolition of Mound C suggest that it was once a burial mound. Artifacts collected from the surface of the site indicate that Native Americans lived here from ca. AD 400 to 1500.
