Feature 129 is a large, rectangular basin with a short projection located in the northeastern quadrant of the Miami Circle, near the eastern side of the Circle’s arc. Eight smaller holes were found in the bottom of the basin. Like many of the other basins in this area, Feature 129 contained a large number of limestone cobbles. The excavation notes indicate that the midden contained a large number of conch shells and shell fragments, as well as animal bone and fragments of concreted midden.