SU 5100 is a rubble wall built to block off the street from the area north of the area F structure. It abuts the corner of the building and cuts through the construction trench of wall 5009, so must be later than the building. This is suggested also by the different construction technique. Some of the stones in the eastern face appear to be "quasi-polygonal", similar to wall SU 5008 and 5009 - however, this does not continue all the way across the eastern face, so it remains unclear as to whether these are reused blocks incorporated opportunistically into the rubble wall or those could possibly represent an earlier phase (wall documented here as a single SU). Interestingly, what appears to be a fill of a construction cut on the east side continues south for wall SU 5008, perhaps suggesting more or less simultaneous construction (?). The rubble on the west side, on the other hand, appears to have been built contraterra.