Room 143W is an original Chacoan room in the western sector of Salmon, west of the Tower Kiva (Room 64W). In the San Juan period, a kiva (Room 143A) was added to the room. The Chacoan room (143W) measures 6.2 x 5.8 m and the later kiva (143A) was 5m in diameter. Four strata were defined as the upper portion of the room was excavated. One feature, a burial, was recorded. The limited data available suggest the room was used throughout Salmon's 200-year history.