An inlet channel 1.7 meters above the bottom level of the 4.26 meter deep tank allowed excess water to escape. Other inlets prevented siltation of the tanks and erosion of the banks.
The rooms of the upper town were obviously built for upper classes. They had private pathed brick baths and a remarkable network of drains and cesspools.
The proximity of the seat of power to the warehouse may have ensured that the ruler and his entourage could inspect stocks easily. An ivory workshop in the acropolis suggests that elephants may have been domesticated to produce the raw material.