The circle is composed of an earthen wall, approximately 1 foot (0.30 m) high. Its interior, which is slightly raised above the surrounding terrain, can be accessed through a small opening in the wall that appears to have housed a gate at one time. Because the circle has never been excavated, its contents and uses are uncertain; however, archaeologists have speculated that postholes or other evidence of a house or similar structure may be contained within the circle.[3]: 103
In 1975, the circle's archaeological value was recognized when it was added to the National Register of Historic Places. The landmarked area includes approximately 3 acres (1.2 ha) of land,[1] due to the possibility of finding related artifacts in the close vicinity of the circle.[3]: 103
