Room 102C is the western subdivided portion of 102A. As a lower room space below 102A, it has a short stratigraphic sequence. Five strata of Chacoan age were identified: two trash layers, a floor with few artifacts, a feature-based unit, and a wall foundation. Three features were found: a Chacoan pit, wall, and burial of probably San Juan origin. The room's original function is unclear but it was used as a trash-dumping area in the late Chacoan and San Juan periods.