Room 99W is an original Chacoan room located in the northeast corner of Salmon Pueblo. It measures 2.2 x 2.2 m. Much of Salmon's back two rows of rooms collapsed as a unit at some point after abandonment. Thus, little of the room's walls were present at the time of excavation and not much accumulated fill was present. Five strata were identified including two post-occupational fill layers and a floor complex. The floor had few artifacts and no features. The only feature was a Chacoan doorway. Given its location, 99W was likely built around 1090 in the initial wave of Chacoan construction.