Room 5W refers to the original Chacoan square room, which measures 5.8 x 4.4 m. The western Chacoan wall, at one point, extended farther east; this wall was removed when the San Juan kiva (Room 5A) was constructed. Five Chacoan strata were defined for Room 5W including a floor surface, occupational level, and feature fill. Room 5W had a single feature, an oval, clay-lined hearth. Room 5W was impacted by pot-hunting activities. It is estimated that Room 5W was built around 5–10 years after the initial construction period at Salmon Pueblo, by 1095