Looking south along the street to the east of the Great Bath. In the foreground is a unique brick platform with hollow sockets used to place upright beams that may have formed a gate or traffic control device.
As structures were filled and street levels were raised, the drains eventually became useless and were blocked with debris and brick walls.
In some neighborhoods, large courtyards were connected to numerous smaller buildings built at different levels. The pilastered wall on the left supported houses at a higher level.
Many large covered drains were constructed with corbelled arches. These drains ran beneath streets and lanes and were large enough for workmen to enter and clear any obstructions.
The corbelled arch drain from the great bath is large enough to walk into. It has a small ledge on either side of the actual drain channel.
This drain cuts through the edge of the so-called granary. If the entire drain were constructed along with the Great Bath, this feature would indicate that the original "granary" was built before the great bath.
The floor slopes down to the southwest corner where a small outlet (top right) leads to a brick drain, which takes the water to the edge of the mound.
At the southwestern corner of the sloping floor, a small drain first passes through the massive walls of the tank and connects to a corbelled arch drain that curves along the edge of the northern terrace of the granary to the west.