Possibly a leveling fill to support a floor that has completely disappeared: suggested by fairly even top limit against wall, accompanied by a line of mortar. Alternately a support for a basin feature of which no direct evidence survives. Excavation of adjacent wall plug may reveal more. Underlying rubble slope may represent an earlier fill?

To be excavated in 2017. Rubble deposit likely due to an intentional fill in Room I-4 rather than a collapse. Possibly a leveling layer for a raised flow surface - the high level of the foundation in adjacent wall 8076 also supports this. Perhaps, due to the shape of the deposit and its overlap with wall foundations, deposit was related to a later basin-type use of the western part of Room I-4.