The National Buildings Construction Corporation (NBCC) had been assigned the task of restoring the lake which is also famous for boating among Delhi residents. The restoration of the various facilities and the illumination of Purana Qila have been done at an estimated cost of Rs 30 crore.
Officials said the the lake will be recharged during the monsoon with rainwater. “If the monsoon this year is not good, we will talk to the Delhi Jal Board to supply water to the moat,” said an ASI engineer.
The present citadel at Purana Qila is believed to have been built under Sher Shah Suri. But according to ASI's Vasant Swarnkar, the excavations — the last one was in 2013-14 — point to traces from the 3rd century BC, the pre-Mauryan period.
The bench headed by NGT Chairperson Justice Swatanter Kumar said the lake, which used to attract tourists, is now covered with moss and has become a dumping ground. The NGT took exception to non-compliance of its May 19 order to expeditiously restore all water bodies in the city.