Towards the east, in what was probably a low area, a series of radiating mud-brick retaining walls were built to contain rubble that was used as a foundation for later structures, only fragments of which are preserved.

Structures in this part of Harappa were sometimes made of a combination of mud-bricks and baked bricks, sometimes mixed in the same wall as seen here in the case of both the southern part of the western wall and part of the northernmost wall.