Room 88W was built during the San Juan period and was originally thought to be a completely enclosed structure. Further investigation indicated that it was an extramural, partially enclosed plaza workspace. The area had enclosing walls from adjacent complete rooms on the north and east and an expedient partial wall on top of San Juan deposits on the west but no wall on the south. The space enclosed by the wall measured 3.6 x 3.3 m. Ten strata were identified in 8W including post-occupational fill, structured trash, feature fill, and floor and floor contact layers. Three features were defined in the room including two burials and a San Juan era subdividing wall. The room space and function are not clear. Given the ceramic assemblage, Room 88W was probably built late in the occupation of Salmon, after 1200.