There are about 30 mounds in this area, 7 of which are large, ranging in
height from 5 to 15 feet. With one exception, all are flat-topped
platform mounds. The one having a different form is an oval-shaped
burial mound.
The mounds were excavated in 1934 under the direction of the Smithsonian
Institution. Quantities of broken pottery, bone implements, stone tools,
and weapons were removed. Twelve skeletons were found in the oval burial
mound.
The effigy pipe, now on display at park headquarters, was removed from
the burial mound in 1899 under the direction of the Park Commission.