Room 89W is an original Chacoan room located along Salmon's back wall in the northeast sector of Salmon Pueblo. It measures 5.8 x 2.2 m. Nine strata were identified in Room 89W, including post-occupational fill, roof-fall, unstructured San Juan trash fill, occupational fill, and a floor. A mix of Chacoan and San Juan ceramics was found under the floors. Eight features were identified in 89W, including a Chacoan doorway in the south wall, upright posts, and four vent windows located in the upper east and west portions of the north and south walls. The windows were sealed at some point during the occupation. Its location along the back wall and the absence of floor features indicate a probable storage function during both periods of occupation. Upright posts were installed on either side of the Chacoan door during the San Juan occupation to make the room easier to seal off as a storage facility. Given its location and assemblage, Room 89W was built during the initial occupation, around 1090. Later San Juan use of the room continued from the mid-1100s into the 1280s.