Feature 77 is two joined basins located in the northwestern quadrant of the Miami Circle. The larger basin is oblong and the smaller basin is a rectangular extension from the larger feature. The sides of both basins are vertical and have vertical cut marks. Ten smaller holes are present in the bottom of Feature 77, including a few paired holes. The midden excavated from this feature included animal bone, some marine shell, burned limestone, at least two large limestone cobbles, concreted midden, sand-tempered plain sherds and at least one check stamped sherd.