New Delhi: The ambitious interceptor sewer project aimed at controlling pollution in Yamuna by preventing flow of untreated water into it was on Thursday launched by Delhi
Chief Minister Sheila Dikshit.

A 59-km-deep sewer at the depth of 20 to 60 feet will be laid at a cost of Rs 1,978 crore along the river as part of the project to contain pollutants being released into the river by three major drains.

"In coming 2-3 years, the water which reaches Yamuna from various areas will become cleaner and pollution free due to this plant," Dikshit said.

The interceptor sewer will be laid along Najafgarh, Supplementary and Shahdara drains to intercept sewage flowing from the subsidiary small drains. This sewage will be conveyed to the nearest Sewage Treatment Plant (STP) to ensure that only treated sewage is discharged into the river, Delhi Jal Board Chief Ramesh Negi said.

DJB will oversee implementation of the entire project.    

Negi said the plant will also trap sewage flowing from over 1,600 un-authorised colonies and other un-sewered areas including slum clusters and treat them in the nearest Sewage Treatment Plant (STP) before releasing them into the major drains.

"The project will ensure that the three major drains, which release 75 percent of the total affluents into Yamuna, release only treated water," he said.

In Delhi, only 55 percent areas have sewage system.

Engineers India Ltd has been appointed as project management consultant for the project.