These stones originally appeared to be related to the drain 7201, since they matched in alignment, but there was no physical relationship between these stones and the shoulder of the drain. The first two are clearly reused paving stones. Current purpose is unclear at the end of the 2017 season.
Linear feature of three basalt stones in the center of room 5, running parallel to wall su 7108 and abutting cut su 7151.
View from south (1/3)
View from south (2/3)
View from south (3/3)