Room 127B is the southern (southeast and southwest) interstitial space around the 127A kiva ventilator tunnel and between the original Chacoan walls. Five strata were identified in 127B: roof-fall and artificial fill layers. Room 127B had one burial feature from the San Juan occupation. The burial was apparently interred after the 127A kiva was constructed and before the end of occupation of the site in the 1280s.