The Indus Civilization c5.54

c5.54

Another feature of the Indus Valley drainage system was the large brick culverts with corbelled roofs which were constructed on the outskirts of the city to carry away storm water, for much more rain fell in Sind five thousand years ago. The culverts, some as large as two and a half feet wide and between four and five feet high, had a channel of ordinary size in the floor to carry off the normal flow of water, while the larger area above only came into use at times of heavy weather. Their very fine masonry and clever workmanship make these culverts excellent examples of sanitary engineering, and they show to what a high degree of civilization their builders must have attained.