The dockyard at Lothal is roughly 223 m. in length, 35 m. in width and 8 m. in depth. The dockyard is a trapezoidal basin that's bound by baked bricks on all sides. It's located at the eastern edge of the township.

A sluice gate and a spill channel [12.30 m. wide ] maintained a consistent water level in the dockyard so that if there is excess water can be drained out.  A direct link between Lothal and the former course of the River Sabarmati has also been identified.