Archaeologists documented a series of three public structures (buildings that served the community at-large) beneath the western mound. None appeared to have been roofed. These Fort Ancient submound structures reflect continuity with earlier Woodland period Adena and Hopewell mound sites, such as Robbins, Wright, Crigler, and Bullock, beneath which archaeologists also have documented roofless circular or rectangular submound structures.
The earliest submound structure at Cleek-McCabe was circular and measured 43 feet in diameter. It was followed by a rectangular structure that measured 40 by 80 feet. This second structure was followed, in turn, by a third, even larger, rectangular structure that measured 56 by 95 feet. Investigators documented several burials, a rectangular fire basin, and an area covered with charred twigs, bark, and grass enclosed within the largest submound structure.
Also of note were three very large pole-pits (pits dug for poles that were not part of the structure). One pole-pit was in the center of all three structures, suggesting that a central pole was an important element likely linked to religious activities carried out within all three structures. Residents erected poles in the other two pole-pits after building the first rectangular submound structure.