The historic town of Allahabad (now called Prayagraj) and also known as the Sangam City is known for its dense population, congested roads and the famous Kumbha Mela, where thousands throng to take a holy dip in the Ganges. Also with the influx of more and more people everyday demand for support services like water supply, drainage, sewerage, garbage collection and disposal is rising alarmingly.

Massive amount of per capita waste from domestic and industrial activities are generated and allowed to be discharged into the Ganga river without being treated, thus polluting not only the water and creating various kinds of diseases but also the biodiversity of the river was being badly effected. The lack of periodic maintenance and the renovation of the old sewerage systems created further problems for the city.

Emergency to rehabilitate the two sewers of Georgetown and Bairahana had risen just before the huge event of Kumbh Mela due to the same problem of ground water infiltration and blockage at various areas due to which there would be overflow and flooding in the low lying areas causing unhealthy environment. Onsite India was awarded the work of rehabilitation of Bairahana which was specially the main sewerage of the district, which had all the flow coming into it and making it hundred percent silted and a massive volume to control. Due to lot of “petha” (Indian sweet) manufacturing units releasing their wastes into this sewer it had a lot of calcium deposits making it particularly difficult for us to work. To top all this the areas were extremely congested, sewers passing mainly under the bylanes of the residential areas.