Editing Hydromanagement in Ancient India (section)

=== '''Mohenjodaro: The Great Bath''' ===
The Great Bath was part of what appears to have been a vast hydropathic establishment and the most imposing of all the remains unearthed at Mohenjo-daro. Its plan is simple: an open quadrangle with verandahs on its four sides, a large swimming pool sunk 8 feet below the paving of the court, and a flight of steps at either end. The walls of the bathing pool were uniformly 1.36 meters thick and made waterproof by a regular lining of bitumen (tar) 2.4 centimeters thick. A drain was found in the southwest corner inside the bath. This was a hole in the brick facing that goes through two baked-brick walls and an intervening packing of clay. The end of the drain has been removed by erosion of the western edge of the mound and cannot be traced. Marshall proposes that the impressive corbelled arch of the bath drain "may have served as a secret exit in times of need." It was surrounded by a colonnade, seven across the width and ten along each side, with a roof that would have opened to the sky along with drains for the disposal of dirty water (Jansen, 1989)<sup>15</sup>.